ELAN MICROELECTRONICS CORPORATION Patent applications |
Patent application number | Title | Published |
20160110017 | METHOD OF IDENTIFYING PALM AREA OF A TOUCH PANEL AND A UPDATING METHOD THEREOF - A method of identifying a palm area for a touch panel has steps of: receiving sensing frame information having multiple touching sensing points from the touch panel; selecting one of the touching sensing points; outwardly extending a distance from an outline of the selected touching sensing point to define a searching range; checking whether other touching sensing points are within the searching range; marking the touching sensing points in the searching range and expanding the searching range based on the currently marked touching sensing points; sequentially selecting and checking each touching sensing point if it is within the present searching range; and finally merging all the outlines of the marked touching sensing points to form a final outline as a palm area. Other unmarked touching sensing points are defined as touching reference points. | 04-21-2016 |
20160098118 | CAPACITIVE TOUCH DEVICE AND EXCITATION SIGNAL GENERATING CIRCUIT AND METHOD THEREOF - The present invention is related to a capacitive touch device and excitation signal generating circuit and method thereof. The excitation signal generating circuit is connected to multiple sensing traces of the capacitive touch device, and has a storage unit storing at least one set of digital data. Each set of digital data is corresponding to a frequency. The PDM signal generator reads the set of digital data and converts the read set of digital data to a PDM signal according to the frequency of the read set of digital data. The PDM signal is recovered to an analog excitation signal since the PDM signal passes through a current transmission path, which is equivalent to a low pass filter. Therefore, the present invention can decrease a distortion of the sensing signal to increase accuracy of the sensing signal and to save power. | 04-07-2016 |
20160092019 | SCANNING METHOD AND DEVICE OF A SINGLE LAYER CAPACITIVE TOUCH PANEL - A scanning method and device of a single layer capacitive touch panel has a self and mutual capacitive scanning procedures. The single layer capacitive touch panel has multiple electrode groups and shielding units respectively formed between the two corresponding adjacent electrode groups. When the self capacitive scanning procedure is executed, a first driving signal is outputted to each of the electrode groups and each of the shielding units. A self capacitive sensing signal of the driven electrode group is received after then. When the mutual capacitive scanning procedure is executed, a second driving signal is outputted to each of the electrode group and each of the shielding unit is connected to a ground. A mutual capacitive sensing signal from each of the driven electrode groups is received after then. Therefore, the self capacitance value of the self capacitive sensing signal is not increased greatly since the shielding units are not connected to the ground. | 03-31-2016 |
20160062543 | TOUCH CONTROL DEVICE AND METHOD - A method for controlling a touch control device includes defining a first area and a second area on a touchpad, detecting whether a touched position on the touchpad that is touched by an operating object falls in the first area or the second area, and calculating the corresponding on-screen coordinates of the operating object with different sets of ratios depending on the touched position. | 03-03-2016 |
20160054831 | CAPACITIVE TOUCH DEVICE AND METHOD IDENTIFYING TOUCH OBJECT ON THE SAME - A capacitive touch device and a method identifying touch object on the touch device read sensing information of multiple traces of a touch panel corresponding to a touch object, in which the sensing information includes a sensing cluster corresponding to a portion on the touch panel touched by the touch object, identify a hover cluster of the sensing information corresponding to a portion adjacent to and surrounding the sensing cluster, determine if the hover cluster meets a first characteristic, and determine that the touch object is a specific touch object when the hover cluster meets the first characteristic. Given the foregoing device and method, a palm rejection operation can be more accurately performed and is also applicable to object detection at corners of the touch panel. | 02-25-2016 |
20160050758 | SCREEN CONTROL MODULE OF A MOBILE ELECTRONIC DEVICE AND CONTROLLER THEREOF - A screen control module of a mobile electronic device has at least one controller formed on a circuit board. The circuit board has multiple solder pads formed on the circuit board and respectively aligning along a first direction and a second direction. An amount of the solder pads along the first direction is greater than that along the second direction. The controller is formed by an integrated circuit with a package, and the aspect ratio of the package is not less than 2. The package has multiple electrical contacts respectively aligning along a length direction and a width direction. Each electrical contact aligns with and is electrically connected to a corresponding solder pad. Accordingly, the screen control module mounted within a side frame of a display of the mobile electronic device can increase the aspect ratio to meet the demand for narrowing the side frame of the display. | 02-18-2016 |
20160050378 | PIXEL SENSOR DEVICE AND OPERATING METHOD THEREOF - A pixel sensor device has a first sensing unit, a second sensing unit, a first control and reading unit, and a second control and reading unit. The first and second sensing units are disposed concentrically. The first and second control and reading units are connected respectively to the first and second sensing units for separately or simultaneously controlling the first and second sensing units to perform sensing. Since the first and second sensing units are formed by a single pixel sensing array and arranged concentrically, only a single focusing element is required to align centers of the first and second sensing units during the manufacturing process. This achieves high focus accuracy and increases precision in recognition. In the applications of fingerprint recognition and pulse measurement, the user only uses a single finger for sensing so that inaccurate focusing resulted from moving finger is avoided. | 02-18-2016 |
20160037095 | ACTIVE PIXEL SENSOR DEVICE AND OPERATING METHOD OF THE SAME - An active pixel sensor device and the method thereof include an active pixel sensing array and a synchronous reading circuit. The active pixel sensing array is formed by a plurality of sensing pixels disposed in a form of an array. Each sensing pixel has a power terminal. The synchronous reading circuit connects to the power terminals of all sensing pixels, detects a summation of currents flowing through all sensing pixels, converts the summation of currents to an output signal, and outputs the output signal that represents the optical sensing information. In addition to reading each sensing pixel, the active pixel sensor device further controls the synchronous reading circuit to read the output signal corresponding to the summation of currents of all sensing pixels. The active pixel sensor device using the same active pixel sensing array can be applied to large-area sensing. | 02-04-2016 |
20150346908 | HIGH NOISE IMMUNITY SENSING METHODS AND APPARATUS FOR A CAPACITIVE TOUCH DEVICE - High noise immunity sensing methods and apparatus are provided for a capacitive touch device, which sense the capacitive touch device for self capacitance or mutual capacitance or both with different scan frequencies in a frame, to thereby suppress certain frequency noise interference. By combining time domain and space domain noise-eliminating approaches, probabilities of noise interference are reduced, without compromising other parameters. | 12-03-2015 |
20150279775 | SCREEN CONTROL MODULE OF A MOBILE ELECTRONIC DEVICE AND CONTROLLER THEREOF - A screen control module of a mobile electronic device has at least one controller formed on a circuit board. The circuit board has multiple solder pads formed on the circuit board and respectively aligning along a first direction and a second direction. A count of the solder pads along the first direction is greater than that along the second direction. The controller is formed by an integrated circuit with a package, and the aspect ratio of the package is not less than 2. The package has multiple electrical contacts respectively aligning along a length direction and a width direction. Each electrical contact aligns with and is electrically connected to a corresponding solder pad. Accordingly, the screen control module mounted within a side frame of a display of the mobile electronic device can increase the aspect ratio to meet the demand for narrowing the side frame of the display. | 10-01-2015 |
20150261353 | CLUSTERED SCAN METHOD OF CAPACITIVE TOUCH DEVICE - A clustered scan method of a capacitive touch device is disclosed. According to the method, n drive lines of the capacitive touch device are divided into multiple clusters. Each of the clusters has a same number of drive lines. The clusters are driven by a clustered scan procedure in sequence. In each clustered scan procedure, the drive lines of the present cluster are driven for b times, wherein b is equal to the number of the drive lines of each cluster. If at least one bordering drive line exists, a bordering clustered scan procedure is executed, and a bordering drive line and some of drive lines of the previous clusters are driven. | 09-17-2015 |
20150234521 | CLUSTERED SCAN METHOD OF A CAPACITIVE TOUCH DEVICE - A clustered scan method of a capacitive touch device has steps of simultaneously providing driving signals in one driving cycle to multiple driving lines including the (i−j) | 08-20-2015 |
20150153901 | SCAN METHOD FOR A CAPACITIVE TOUCH PANEL - A scan method for a capacitive touch panel has steps of performing a relatively small first number of estimation scans on multiple sensing lines of a capacitive touch panel and recording results of the estimation scans, marking the sensing lines meeting a predetermined condition according to the results of the estimation scans, and performing a relatively large second number of practical scans on the marked sensing lines. Given the first-stage estimation scans and the second-stage practical scans, the sensing lines possibly touched by a touch object can be rapidly identified and marked, and the second-stage practical scans are performed on the marked sensing lines. Accordingly, noises and errors can be effectively reduced, accurate scan can be ensured, and higher frame rate can be achieved. | 06-04-2015 |
20150103040 | TOUCH DEVICE WITH FUNCTION SWITCH CONTROL, SYSTEM WITH THE TOUCH DEVICE, AND METHOD FOR CONTROLLING FUNCTION SWITCH OF THE TOUCH DEVICE - A method for controlling function switch of a touch device has steps of reading sensing information on a touch device when an object approaches or contacts the touch device, determining if the sensing information meets a function-switching condition, and if positive, switching the touch device from the first function mode to the second function mode. When executing an application and receiving a switch-on signal from the touch device, a host computer connected to the touch device activates a function to be switched, for example, an eraser function, a webpage button clicking function, a browser zoom function upon drawing in a drawing application. | 04-16-2015 |
20150077386 | SCANNING METHOD WITH ADJUSTABLE SAMPLING FREQUENCY AND TOUCH DEVICE USING THE SAME - A scanning method with adjustable sampling frequency includes steps of pre-scanning a sensing unit of a touch device to acquire capacitance offsets of sensor traces of the sensor unit aligned in at least one of a first-axis direction and a second-axis direction, determining sampling frequencies according to the capacitance offsets of the respective driven sensor traces, and sampling the sensing unit with the determined sampling frequencies. As the capacitance offsets reflect RC load values corresponding to the sensor traces in the first-axis direction, the sampling frequencies can be adjusted according to the actual RC load values when the sensing unit is scanned to receive sensed signals, thereby effectively raising a report rate of touch events. | 03-19-2015 |
20140375577 | METHOD OF IDENTIFYING EDGE SWIPE GESTURE AND METHOD OF OPENING WINDOW CONTROL BAR USING THE IDENTIFYING METHOD - A method of identifying edge swipe gesture has steps of respectively reading sensing signals on an edge area under a hover mode and on a non-edge area under a touch mode; determining if a touch object has appeared on the edge area after determining that the object has appeared on the non-edge area, calculating a displacement of the object moving from the edge area to the non-edge area within a preset time and determining if the displacement exceeds a preset distance, and determining that the movement of the touch is identified as an edge swipe gesture if the displacement meets the condition. Accordingly, the present invention can perform valid touch on the edge area, rendering effective identification of edge swipe gesture and an increased success rate of the identification. | 12-25-2014 |
20140347316 | TOUCH DEVICE AND MEASURING VOLTAGE DYNAMIC ADJUSTMENT METHOD THEREOF - A touch device and a measuring voltage dynamic adjustment method thereof are provided. The touch device comprises a touch panel, a touch sensing circuit and a processing unit. The touch sensing circuit electrically connected to the touch panel is configured to provide a first measuring voltage to the touch panel and sense capacitance variation of the touch panel to generate a plurality of sensing signals. The processing unit electrically connected to the touch sensing circuit is configured to receive the sensing signals, determine whether a touch is caused by a stylus according to the sensing signals and if yes, enable the touch sensing circuit to provide a second measuring voltage to the touch panel. The second measuring voltage is larger than the first measuring voltage. | 11-27-2014 |
20140327646 | TOUCH DEVICE AND MEASURING VOLTAGE DYNAMIC ADJUSTMENT METHOD THEREOF - A touch device and a measuring voltage dynamic adjustment method thereof are provided. The touch device comprises a touch panel, a touch sensing circuit and a processing unit. The touch sensing circuit electrically connected to the touch panel is configured to provide a measuring voltage to the touch panel and sense the touch panel to generate a sensing signal. The processing unit electrically connected to the touch sensing circuit is configured to receive the sensing signal, calculate a first ratio according to the sensing signal and dynamically adjust the measuring voltage according to the first ratio. | 11-06-2014 |
20140266258 | Circuit and Method for Sensing a Differential Capacitance - A circuit for sensing a differential capacitance includes a charge-storing circuit to generate a first output voltage and a second output voltage related to capacitances at two terminals of the differential capacitance, respectively, an operational amplifier to amplify the difference between the first and second output voltages to generate a sensing value, a first sampling capacitor having one terminal connected to the negative input terminal and the other terminal receiving the first or second output voltage, and a second sampling capacitor having one terminal connected to the negative input terminal and the other terminal switched to the output terminal of the operational amplifier. The second sampling capacitor stores a non-ideal error value to offset the non-ideal effect of the operational amplifier imparted on the sensing value. | 09-18-2014 |
20140184528 | METHOD FOR IDENTIFYING GESTURE - The method for identifying a gesture on a touch panel has steps of receiving position information of at least three touch objects; determining whether the position information of any one of the at least three touch objects has been changed; if the position information of any one of the at least three touch objects has been changed, calculating a first sum of distances between the at least three touch objects before moving, then calculating a second sum of distances between the at least three touch objects after moving, and calculating a variation between the first sum and the second sum; and determining whether the variation exceeds a default value, and if the variation exceeds a default value, a first gesture is identified. The first gesture is identified as a grab gesture or a spread gesture based on whether the variation is positive or negative. | 07-03-2014 |
20140170869 | SCREEN CONTROL MODULE OF A MOBILE ELECTRONIC DEVICE AND CONTROLLER THEREOF - A screen control module of a mobile electronic device has at least one controller formed on a circuit board. The circuit board has multiple solder pads formed on the circuit board and respectively aligning along a first direction and a second direction. A count of the solder pads along the first direction is greater than that along the second direction. The controller is formed by an integrated circuit with a package, and the aspect ratio of the package is not less than 2. The package has multiple electrical contacts respectively aligning along a length direction and a width direction. Each electrical contact aligns with and is electrically connected to a corresponding solder pad. Accordingly, the screen control module mounted within a side frame of a display of the mobile electronic device can increase the aspect ratio to meet the demand for narrowing the side frame of the display. | 06-19-2014 |
20140160060 | DETECTING METHOD FOR A TOUCH DEVICE - A detecting method for a touch device, the method includes the steps of reading all sensed values of a frame associated with the touch device, computing a difference between a maximum sensed value and a minimum sensed value of all the sensed values of the frame, comparing the difference with a base value to generate a comparison result and executing a corresponding operation based on the comparison result. | 06-12-2014 |
20140145978 | TOUCH PANEL HAVING VIRTUAL FUNCTION BUTTON, METHOD OF MANUFACTURING THE SAME, AND METHOD OF IDENTIFYING TOUCH CONFLICT ON THE SAME - A touch device capable of identifying touch conflict has at least one function button mounted on a touch panel of the touch device and at least one auxiliary button mounted around the at least one function button. The at least one function button and the at least one auxiliary button are touch-activated. When users simultaneously or sequentially touch the at least one function button and the at least one auxiliary button, the touch device determines that a touch conflict occurs and determines whether to execute a function originally defined by the at least one function button or to execute another function according to the touch conflict. | 05-29-2014 |
20140124351 | CAPACITIVE TOUCH PANEL AND METHOD FOR MANUFACTURING THE SAME - A method for manufacturing a capacitive touch panel has steps of providing a substrate, delimiting at least one preset zone on the substrate, forming multiple first-axis sensing units and multiple second-axis sensing units on one of the surfaces of the substrate, forming at least one set of connection circuit and at least one die pad on the other surface of the substrate, forming multiple first conductive vias through the substrate with at least one of the first conductive vias located within the preset zone for the second-axis sensing units to be mutually connected by the first conductive vias to form multiple second-axis sensing lines, and bonding a controller with an LQFP (Low Profile Quad) package or a TQFP (Thin Quad Flat) package on the at least one die pad within the preset zone to ensure enough space available to form the at least one first conductive via on the bottom of the controller. | 05-08-2014 |
20140111435 | CURSOR CONTROL DEVICE AND METHOD USING THE SAME TO LAUNCH A SWIPE MENU OF AN OPERATING SYSTEM - A cursor control device has a touch control module for users to perform a swipe gesture. The touch control module generates a control command according to the swipe gesture and transmits the control command to a host computer. The host computer then launches a swipe menu on an edge of a display screen thereof Accordingly, after a host computer with the Win8™ installed therein as the operating system receives the control command, the edge swipe function supported by the Win8™ can be launched. | 04-24-2014 |
20140108999 | METHOD FOR SCROLL BAR CONTROL ON A TOUCHPAD AND TOUCHPAD WITH A SCROLL BAR CONTROL FUNCTION - A touchpad includes a controller connected to a touch sensor. The controller detects the fingers touching on the touch sensor to determine to start up and terminate a scroll bar control function. In the scroll bar control function, the movement of the finger or fingers touching on the touch sensor is detected for scrolling on a window, and the vertical distance and the horizontal distance of the movement are evaluated for determining the scrolling amount of a vertical scroll bar or a horizontal scroll bar of the window. | 04-17-2014 |
20140015755 | METHOD AND APPARATUS FOR HANDWRITING INPUT USING A TOUCHPAD - A handwriting input method and apparatus use a determining process to determine whether or not to enter a handwriting mode according to a first touch when the first touch is detected by a touchpad, define and mark a writing frame corresponding to the touchpad on a screen upon entrance into the handwriting mode, and in the handwriting mode, when the touchpad detects a second touch, use a ratio to calculate coordinates of the second touch to generate corresponding coordinates for the writing frame according to an initial location of the second touch. | 01-16-2014 |
20140001659 | MANUFACTURING METHOD FOR AN INPUT MODULE BY PLASTIC INJECTION MOLDING | 01-02-2014 |
20130307822 | EQUALIZED CAPACITIVE TOUCHPAD AND TOUCH POSITIONING METHOD - An equalized capacitive touchpad and a touch positioning method for a capacitive touchpad use an equalizer to correct a sensed value of a mutual capacitance between two sensing lines of the capacitive touchpad, to thereby offset the attenuation of the sensed value due to the impedance of the two sensing lines. Thus, the sensed values generated from different positions along a sensing line are equalized, and the touch positioning accuracy of the capacitive touchpad is improved. | 11-21-2013 |
20130299330 | TOUCH PANEL HAVING A SINGLE-SIDED SENSING PATTERN - A touch panel has multiple first-axis sensing lines and multiple second-axis sub-sensing sets. Each first-axis sensing line has a second-axis sensing set formed therein with multiple second-axis sensing part of the second-axis sensing set spaced apart along the first axis. The second-axis sub-sensing parts at each identical coordinate of the second axis are connected to constitute a second-axis sensing line, and the first-axis sensing lines and the second-axis sensing lines are mutually crossed. As the second-axis sub-sensing parts constituting each second-axis sensing line are separately enclosed in different first-axis sensing lines, the capacitance values of capacitive coupling between the first-axis sensing lines and the second-axis sensing lines are relatively higher and more stable. | 11-14-2013 |
20130257797 | HIGH NOISE IMMUNITY SENSING METHODS AND APPARATUS FOR A CAPACITIVE TOUCH DEVICE - A sensing method and a sensing apparatus for a capacitive touch device sense variations of self capacitances of first traces in a first direction and second traces in a second direction and variations of mutual capacitances of intersections between the first traces and the second traces, and then generates fourth sensed values from the first, second and third sensed values to serve as sensed values of the changes of the mutual capacitances of the intersections between the first traces and the second traces for identifying one or more touch points. Therefore, noise interference is suppressed and real touch points can be easily to be identified. | 10-03-2013 |
20130257767 | HIGH NOISE IMMUNITY SENSING METHODS AND APPARATUS FOR A CAPACITIVE TOUGH DEVICE - High noise immunity sensing methods and apparatus are provided for a capacitive touch device, which sense the capacitive touch device for self capacitance or mutual capacitance or both with different scan frequencies in a frame, to thereby suppress certain frequency noise interference. By combining time domain and space domain noise-eliminating approaches, probabilities of noise interference are reduced, without compromising other parameters. | 10-03-2013 |
20130241870 | SCAN METHOD FOR INCREASING FRAME RATE OF TOUCH PANEL AND TOUCH PANEL DEVICE USING THE SAME - A scan method for increasing frame rate of a touch panel having multiple driving lines, multiple sensing lines and a scan cycle with multiple detection cycles, has steps of generating multiple sets of asynchronous excitation signals within each detection cycle with each set of excitation signals outputted to a corresponding driving line, and receiving capacitance sensing values from the sensing lines corresponding to the driving lines. In contrast to conventional scan methods only outputting one set of excitation signals within each detection cycle, the time required to scan entire driving lines is greatly reduced and the frame rate is increased. Additionally, as the multiple sets of asynchronous excitation signals are asynchronous, the interference to the capacitance sensing values sensed by the sensing circuit in response to the multiple sets of excitation signals won't occur. | 09-19-2013 |
20130222047 | DRIVING METHOD FOR CHARGER NOISE REJECTION IN TOUCH PANEL - A driving method for charger noise rejection in a touch panel has steps of: reading the sensing frame of the touch panel with a self-capacitance sensing mode, marking at least one first-axis sensing line having a recognizable sensing value, and driving the at least one marked first-axis sensing line with a mutual-capacitance sensing mode to acquire at least one sensing value corresponding to at least one sensing point on each one of the at least one marked first-axis sensing line. Accordingly, the charger noise is rejected in the touch panel by the driving method of the present invention. Additionally, a frame rate is further increased since the sensing lines are partially driven under the mutual-capacitance sensing mode. | 08-29-2013 |
20130215053 | ANTI-INTERFERENCE DRIVING METHOD OF TOUCH PANEL AND TOUCH PANEL DEVICE USING THE SAME - An anti-interference driving method of touch panel has steps of providing a touch panel and outputting multiple excitation signal sets to the respective driving lines of the touch panel. The touch panel has multiple driving lines and multiple receiving lines. Each driving line has multiple sub-driving lines. Each excitation signal set has multiple excitation signals sequentially outputted to the corresponding sub-driving lines. The excitation signals outputted to any adjacent two sub-driving lines are reversed in phase and a time gap between the excitation signals with reverse phases is less than a cycle of each excitation signal. Accordingly, two sensing signals having coupled capacitance values of a noise with different signs is obtained by using a receiving line to sense any adjacent two sub-driving lines and can be directly processed to remove the coupled capacitance value of the noise. | 08-22-2013 |
20130215047 | SCAN METHOD FOR A CAPACITIVE TOUCH PANEL - A scan method for a capacitive touch panel has steps of performing a relatively small first number of estimation scans on multiple sensing lines of a capacitive touch panel and recording results of the estimation scans, marking the sensing lines meeting a predetermined condition according to the results of the estimation scans, and performing a relatively large second number of practical scans on the marked sensing lines. Given the first-stage estimation scans and the second-stage practical scans, the sensing lines possibly touched by a touch object can be rapidly identified and marked, and the second-stage practical scans are performed on the marked sensing lines. Accordingly, noises and errors can be effectively reduced, accurate scan can be ensured, and higher frame rate can be achieved. | 08-22-2013 |
20130203495 | MULTI-FUNCTIONAL TOUCHPAD REMOTE CONTROLLER - A multi-functional touchpad remote controller has multiple functional modes to select therefrom and has a touchpad to support touch input. Different patterns may be shown on the touchpad for different functional modes. For the current operation mode, the specific pattern shown on the touchpad allows simple and intuitive to use the multi-functional touchpad remote controller. | 08-08-2013 |
20130181916 | SCAN METHOD FOR A TOUCH PANEL - A scan method for a touch panel has steps of: receiving a self-sensing frame; calculating sensing slopes between each sensing line and its neighboring sensing lines in the self-sensing frame; determining whether any sensing slope is larger than a slope threshold, and marking the sensing line if the sensing slope is larger than the slope threshold; and executing a mutual scan approach on the marked sensing lines to produce a mutual sensing frame without sensing point caused by noise. Further, the present invention also increases the frame rate since only a part of sensing lines need to be scanned. | 07-18-2013 |
20130176280 | METHOD OF DETECTING FLOATING MODE OF A TOUCH PANEL - A method of detecting floating mode of a touch panel has steps of reading a sensing cluster and presetting a detection window; taking each sensing point of the sensing cluster as a center point of the detection window; after determining that the center point has a negative sensing value qualifying to be generated under a floating mode, further determining a count of the sensing points other than the center point having the sensing values generated under a grounding mode and incrementing an accumulative number by one if the count exceeds a first critical value; keeping incrementing the accumulative number until each sensing point in the sensing cluster has been taken as the center point of the detection window for scanning; and determining if the accumulative number exceeds a second critical value, and if positive, further determining that the current sensing cluster is generated under the floating mode. | 07-11-2013 |
20130147771 | METHOD FOR PREVENTION AGAINST REMISS TOUCH ON A TOUCHPAD - A method for prevention against remiss touch on a touchpad includes dynamically adjusting the scope of an activating area on the touchpad according to a history record of operating the touchpad by the current user, so as to have the protection mechanism against remiss touch automatically adjusted to fit the current user. | 06-13-2013 |
20130106745 | TOUCH PAD OPERABLE WITH MULTI-OBJECTS AND METHOD OF OPERATING SAME | 05-02-2013 |
20130106732 | METHOD FOR IDENTIFYING MULTIPLE TOUCH OBJECTS | 05-02-2013 |
20130076700 | METHOD FOR IDENTIFYING TOUCH OBJECT - A method for identifying touch object has steps of presetting a range of slopes for noise signals, identifying multiple sensed signals, each having a slope higher than the range of slopes for noise signals in a sensing frame, and if the slope of each sensed signal is higher than an upper bound of the range of slopes for noise signals and is higher than each of those of the adjacent sensed signals, determining that the sensed signal is sensed from a corresponding sensed point touched by a stylus. Accordingly, the method can correctly identify a range touched by a stylus from the sensed signals combined with LCM noise signals. | 03-28-2013 |
20120299873 | SENSING METHOD FOR A CAPACITIVE TOUCH SYSTEM - A capacitive touch system uses at least two touch integrated circuits to simultaneously scan a touch panel, each of the touch integrated circuits only for scanning a portion of the traces of the touch panel. Therefore, the capacitive touch system can maintain a good frame rate, even the touch panel is a large scale touch panel. Sensing methods are provided to determine a sensed value for a boundary trace which is the last one of the traces connected to a first touch integrated circuit and prior to the first one of the traces connected to a second touch integrated circuit. | 11-29-2012 |
20120293454 | METHOD OF IDENTIFYING PALM AREA FOR TOUCH PANEL AND METHOD FOR UPDATING THE IDENTIFIED PALM AREA - A method of identifying a palm area for a touch panel has steps of: receiving sensing frame information having multiple touching sensing points from the touch panel; selecting one of the touching sensing points; outwardly extending a distance from an outline of the selected touching sensing point to define a searching range; checking whether other touching sensing points are within the searching range; marking the touching sensing points in the searching range and expanding the searching range based on the currently marked touching sensing points; sequentially selecting and checking each touching sensing point if it is within the present searching range; and finally merging all the outlines of the marked touching sensing points to form a final outline as a palm area. Other unmarked touching sensing points are defined as touching reference points. | 11-22-2012 |
20120280700 | CIRCUIT AND METHOD FOR SENSING A DIFFERENTIAL CAPACITANCE - A circuit for sensing a differential capacitance includes a charge-storing circuit to generate a first output voltage and a second output voltage related to capacitances at two terminals of the differential capacitance, respectively, an operational amplifier to amplify the difference between the first and second output voltages to generate a sensing value, a first sampling capacitor having one terminal connected to the negative input terminal and the other terminal receiving the first or second output voltage, and a second sampling capacitor having one terminal connected to the negative input terminal and the other terminal switched to the output terminal of the operational amplifier. The second sampling capacitor stores a non-ideal error value to offset the non-ideal effect of the operational amplifier imparted on the sensing value. | 11-08-2012 |
20120262429 | PEN FOR CAPACITIVE TOUCH INPUT - A pen for capacitive touch input includes a replaceable head and a conductive handle. The conductive handle is a tube having a tunnel or a rod having a stocking hole for receiving the replaceable head and exposing the conductive tip of the replaceable head to touch a capacitive touch control device. The pen is adaptive to different capacitive touch control devices for precision and sensitivity on position detection by using different replaceable heads. | 10-18-2012 |
20120262415 | TOUCH-CONTROLLED DEVICE, IDENTIFYING METHOD AND COMPUTER PROGRAM PRODUCT THEREOF - A touch-controlled device, an identifying method and a computer program product thereof are provided. The touch-controlled device comprises a touch panel and a processor. The processor is electrically connected to the touch panel, and is configured to detect a first touched region and a second touched region of the touch panel. The processor is further configured to identify one of the first touched region and the second touched region as being touched by a major input object and the other one as being touched by a non-major input object according to a ratio of a moving velocity to a touch area of each of the first and second touched regions. | 10-18-2012 |
20120256877 | TWO-DIMENSIONAL CAPACITIVE TOUCH PANEL WITH SINGLE SENSOR LAYER - A two-dimensional capacitive touch panel includes three electrodes made from a single sensor layer, with the first one of the electrodes between the other two of the electrodes to establish mutual capacitances between the first electrode and the other two, respectively. The mutual capacitance between the first and second electrodes increases along a direction, and the mutual capacitance between the first and third electrodes decreases along a direction. The first electrode is applied with an excitation signal for sensing variations in the mutual capacitances to calculate a position in the direction that is touched by an external conductor. | 10-11-2012 |
20120256876 | CAPACITIVE TOUCHPAD - A capacitive touchpad has insulating blocks provided above and below a resilient layer. The insulating blocks above the resilient layer are offset in position with respect to the insulating blocks below the resilient layer. Due to the insulating blocks, a plurality of gaps are formed in the capacitive touchpad. The gaps are filled with a fluid medium. When a conductive or non-conductive object touches the capacitive touchpad, the resilient layer is deformed at the touched position and thereby displaces the fluid medium completely from the affected gaps. As a result, the distance and the dielectric coefficient between the resilient layer or an electrode plate and a sensor layer are changed, causing variation in capacitance. | 10-11-2012 |
20120256875 | ELIMINATION OF ENVIRONMENTAL INTERFERENCE TO A CAPACITIVE TOUCH PAD BY A DUMMY TRACE - A capacitive touch pad includes a sensor layer for sensing a touch of an object and a dummy trace below the sensor layer. The dummy trace is sensed to obtain a sensed value while the dummy trace is shielded by the sensor layer from interference of the object such that the sensed value reflects only environmental variation. Therefore, environmental variation can be identified depending on the sensed value, and the sensor layer can be calibrated properly. | 10-11-2012 |
20120256647 | CAPACITANCE SENSOR STRUCTURE - A capacitance sensor structure includes a first sensor in a first direction and a second sensor in a second direction for sensing a variation in the mutual capacitance between the first sensor and the second sensor by applying an excitation signal to the first sensor and detecting a response signal from the second sensor. The sensing area of the second sensor is intentionally reduced to be much smaller than the sensing area of the first sensor for noise performance improvement of the mutual capacitance sensing. | 10-11-2012 |
20120182322 | Computing Device For Peforming Functions Of Multi-Touch Finger Gesture And Method Of The Same - A computing device for performing functions of multi-touch finger gesture is disclosed. The computing device includes a receiver to receive at least one of a first input from a first object or a second input from at least two second objects, a look-up-table (LUT) module to store a second set of functions associated with the at least two second objects, and a mapping module to map one type of the first input from the first object to a corresponding one of the second set of functions. The computing device is configured to perform a corresponding one of the second set of functions based on the type of the first input. | 07-19-2012 |
20120146726 | CIRCUIT AND METHOD FOR SENSING A CAPACITANCE - A transconductance amplifier mirror circuit is connected to an electrode for sensing the capacitance of the electrode with reference to ground, or the capacitance between the electrode and another electrode. A voltage level change is produced on the electrode connected to the transconductance amplifier mirror circuit to cause the transconductance amplifier mirror circuit to supply charges to or drain charges from a charge calculation circuit. The charge amount variation is converted to a signal for calculating the sensed capacitance. | 06-14-2012 |
20120092330 | CONTROL METHODS FOR A MULTI-FUNCTION CONTROLLER - In control methods for a multi-function controller, which includes a sensor having a ring operation region, the position of an object on the sensor is detected for generating a position information, and the force applied to the sensor by the object is detected for generating a force information. When the sensor detects multiple successive position information, which indicate that the object is circling along the ring operation region, a rotation information may be generated additionally. The position information, the force information and the rotation information are used to perform operation in various functional modes. | 04-19-2012 |
20120075215 | SINGLE LAYER IMPLEMENTED TWO DIMENSIONAL TOUCHPAD - A single-layer implemented two-dimensional touchpad includes two groups of sensing units arranged abreast along two directions, respectively. The first group of sensing units have one end adjacent to the connection region of the touchpad and are connected with wires routing to the connection region. The second group of sensing units are connected with wires bypassing the first group of sensing units and routing to the connection region. This arrangement decreases the number of wires routing through the margin of the circuit board of the touchpad to downsize the margin width and reduce the limitation to the touchpad size simultaneously, only by changing the layout of the sensing units, without increasing the manufacturing mask and steps. | 03-29-2012 |
20120062488 | PREVENTION AGAINST REMISS TOUCH ON A TOUCHPAD - A touchpad is defined with two or more detect regions thereon, and each of the defined detect regions has a respective remiss threshold for identifying remiss touch. When any of the defined detect regions is touched, the touchpad compares the touch area of the detected touch with the remiss threshold of the touched detect region to identify whether the detected touch is a remiss touch or not. Preferably, the location, range and threshold setting of the detect region is user defined, so that a user may adjust the remiss setting for optimized prevention against remiss touch. | 03-15-2012 |
20120044605 | ESD PROTECTION FOR HIGH-VOLTAGE-TOLERANCE OPEN-DRAIN OUTPUT PAD - A high-voltage NMOS transistor for ESD protection is coupled between a high-voltage I/O pad and a low-voltage terminal, and has a parasitic component between its source and drain. A trigger has an input coupled to the high-voltage I/O pad and an output coupled to the parasitic component. When the voltage on the high-voltage I/O pad raises above a threshold value, the trigger applies a voltage to trigger the parasitic component, so as to release an ESD current from the high-voltage I/O pad to the low-voltage terminal through the high-voltage NMOS transistor. | 02-23-2012 |
20120026130 | LINEARITY IMPROVEMENT OF A CAPACITIVE TOUCH PAD - A capacitive touchpad includes a first trace established by a string of first rhombic sensing cells successively in a first direction and a plurality of singular second rhombic sensing cells branched in a second direction from the string of first rhombic sensing cells, and a second trace established by a string of third rhombic sensing cells successively in the first direction and a plurality of singular fourth rhombic sensing cells branched in the second direction from the string of third rhombic sensing cells, and the second rhombic sensing cells are interleaved with the fourth rhombic sensing cells in the first direction. The capacitive touchpad is thus improved in its linearity. | 02-02-2012 |
20120021159 | TRANSPARENT TOUCH PANEL WITH IMPROVED CURED ADHESIVENESS - A transparent touch panel includes a light-pervious substrate, conductive traces on the light-pervious substrate, a protective layer on the conductive traces, and a cured adhesive between the conductive traces and the protective layer for bonding them together. The conductive trace has a light-pervious area to allow the ultraviolet light for curing the adhesive to pass and reach the adhesive behind the conductive trace during the ultraviolet light treatment to the adhesive, and thus improve the cured level of the adhesive. | 01-26-2012 |
20120019268 | CAPACITANCE SENSOR LAYOUT SCHEME FOR LINEARITY IMPROVEMENT - A capacitive touchpad includes a plurality of parallel traces configured in a capacitance sensor layout scheme such that the maximum sensor gap is smaller than the sensor pitch to improve the sensor response linearity of the capacitive touchpad. | 01-26-2012 |
20120013571 | THREE-DIMENSIONAL TOUCH SENSOR - A three-dimensional touch sensor is constructed from a two-dimensional capacitive touch sensor in association with a conductive layer and an elastic insulator or with an insulation layer and an elastic conductor. When the three-dimensional touch sensor is touched, the two-dimensional capacitive touch sensor positions the touch point in a sensing plane, and the elastic insulator or the elastic conductor deforms responsive to the pressure and thus generates a capacitance variation, from which a sensing value in the perpendicular direction is derived related to the magnitude of the pressure. | 01-19-2012 |
20110267312 | SENSING UNIT, SENSING ARRANGEMENT AND SENSING METHOD FOR TOUCH PANEL APPLICATION - Two sensing units are configured as an exciter and a sensor connected to two trace lines, respectively, for mutual capacitance sensing from the capacitance units including these two trace lines. The two sensing units connect the two trace lines together to balance them to a same voltage level first, and then disconnect them from each other. Thereafter, the exciter connects the first trace line to an excitation node to induce a charge change on the second trace line, and the sensor senses the charge change to detect the variation of the mutual capacitance between the two trace lines. | 11-03-2011 |
20110191723 | METHOD OF CONTROLLING A CURSOR ON A MULTI-TOUCH SCREEN BY USING ON-DEVICE OPERATION - A method of controlling a cursor on a screen by using a touch device includes changing a display coordinate set of the cursor on the screen representative of an object according to a relative coordinate set with respect to movement of the object on the touch device, hiding the cursor from the screen when the object leaves the touch device for a duration in excess of a predetermined time, and when the cursor is not displayed on the screen and an object touches the touch device, computing an initial display coordinate set of the cursor on the screen according to an absolute coordinate set of the object on the touch device and a resolution ratio between the touch device and the screen. With this method, the cursor on the screen can be intuitively operated by using the touch device. | 08-04-2011 |
20110122088 | PASSIVE ARCHITECTURE AND CONTROL METHOD FOR SCANNING A TOUCH PANEL - A passive architecture for scanning a touch panel includes a master IC and at least one passive touch IC connected to the master IC. The master IC generates a command to configure the scan parameters of the at least one passive touch IC, and the at least one passive touch IC scans the touch panel with the scan parameters in response to the command. | 05-26-2011 |
20110115743 | SENSING METHDO AND CALIBRATION METHOD FOR A CAPACITIVE TOUCH PANEL - Stimulus regions are defined based on the traces of a capacitive touch panel. A first signal is applied to a first trace in a first direction under a second signal applied to a second trace in a second direction to stimulate the second trace, to sense a stimulus region for an ADC value thereof. Calibration parameters for the traces are determined according to the ADC values of the traces without being touched, and are stored for later sensing the traces for position calculation and multi-finger calculation. | 05-19-2011 |
20110109575 | METHOD FOR CURSOR MOTION CONTROL BY A TOUCHPAD TO MOVE A CURSOR ON A DISPLAY SCREEN - A cursor control method using a touchpad triggers an automatic movement signal for a cursor when an object moves from a first defined region into a second defined region of a two-dimensional touch sensor, or when an object stays in the second defined region for a preset duration after it moves from the first defined region into the second defined region, and define the automatic movement signal with the direction identical to that of the object moving into the second defined region, so that the cursor will keep moving in its last moving direction. | 05-12-2011 |
20110093736 | METHOD AND CIRCUIT FOR TRIMMING AN INTERNAL OSCILLATOR OF A USB DEVICE - A circuit and method for trimming an internal oscillator of a USB device that generates a clock signal as a frequency source of the USB device detect an end of packet from an input data stream to initialize a counter, identify a token packet in the data stream to detect a start of frame token packet for the counter to carry out clock counting on the clock signal to thereby obtain a count value, and compare the count value with a reference value to determine a trimming code for trimming a clock frequency of the internal oscillator. | 04-21-2011 |
20110050635 | BOUNDARY RESOLUTION IMPROVEMENT FOR A CAPACITIVE TOUCH PANEL - A capacitive touch panel has a plurality of traces including a boundary trace, and a virtual trace is defined outward of the boundary trace and assigned with a virtual coordinate and a virtual capacitance for interpolation to position a touch point around the boundary of the capacitive touch panel, thereby eliminating the non-addressable region of the capacitive touch panel. | 03-03-2011 |
20110050634 | DETECTOR CIRCUIT AND DETECT METHOD OF A CAPACITIVE TOUCH PANEL - A detector circuit and detect method of a capacitive touch panel conditionally abort sensing of useless traces of the capacitive touch panel when the capacitive touch panel senses the traces thereof. For a selected trace, the trace voltage thereof is sampled to be compared with a threshold voltage. If the sampled voltage is lower than the threshold voltage, the sensing of this trace is aborted and thus the operation of the detector circuit is reduced to improve the performance of the capacitive touch panel. | 03-03-2011 |
20110050633 | DETECTOR CIRCUIT AND DETECT METHOD OF A CAPACITIVE TOUCH PANEL - A detector circuit and detect method of a capacitive touch panel conditionally abort detection of useless traces of the capacitive touch panel when the capacitive touch panel detects the traces thereof. For a selected trace, first several digital values obtained by detecting the selected trace are compared with a threshold value to identify whether the selected trace is useful or not, and if the selected trace is identified useless, an abort signal is triggered to abort detection of the selected trace. Therefore, the performance of the capacitive touch panel is improved with higher frame rate and less power consumption. | 03-03-2011 |
20110050632 | MULTI-FIELD SENSING OF A CAPACITIVE TOUCH PANEL - A detect method of a capacitive touch panel alternately senses the traces of the capacitive touch panel to generate two series of fields, interpolates with the first fields to obtain interpolation fields having temporal coordinates identical to that of the second fields, and combines the second fields and the interpolation fields to generate reconstructed frames for coordinate calculation. Therefore, the capacitance sensing sequence of the traces is scheduled in a multi-field way to reduce the operation of the detector circuit of the capacitive touch panel. | 03-03-2011 |
20110050614 | OBJECT POSITIONING FOR AN X-Y PROJECTED CAPACITIVE TOUCH PANEL - Methods are proposed for object positioning for an X-Y projected capacitive touch panel. In an embodiment, capacitance sensing under inphase excitation of traces is applied to set a base value when the capacitive touch panel is not touched and to obtain capacitances at intersections when the capacitive touch panel is touched, and the base value is compared with the measured capacitances to identify touch points. In other embodiments, X-Y projected sensing and all-point sensing are combined to reduce the amount of calculation and achieve the same positioning effect as an all-point capacitive touch panel. | 03-03-2011 |
20110037723 | FRONT-END SIGNAL DETECTOR AND METHOD FOR IMPROVING NOISE IMMUNITY OF A CAPACITIVE TOUCH SENSOR - A front-end signal detector and a method for improving noise immunity of a capacitive touch sensor start counting a preset time to trigger an interrupt signal responsive to a positive or negative edge of a periodic noise, to break the path through which a demodulated signal comes into a low-pass filter, to prevent noise from accumulating in the low-pass filter, and consequently mitigate the influence of the noise on the detection signal generated by the front-end signal detector. | 02-17-2011 |
20110022990 | METHOD FOR OPERATION TO A MULTI-TOUCH ENVIRONMENT SCREEN BY USING A TOUCHPAD - A method for operation to a multi-touch environment screen by using a touchpad defines a movable control window on the screen, calculates an inter-window coordinate set of the object mapped from the touchpad to the control window according to an absolute coordinate set of the object on the touchpad and a resolution ratio between the touchpad and the control window when the touchpad is detected being touched, defines a cursor on the screen representative of the object according to the inter-window coordinate set, and changes a coordinate set of the cursor on the screen representative of the object according to a number of the object on the touchpad and movement thereof. This method allows a user to intuitively operate the screen by using the touchpad. | 01-27-2011 |
20110018828 | TOUCH DEVICE, CONTROL METHOD AND CONTROL UNIT FOR MULTI-TOUCH ENVIRONMENT - A touch device for multi-touch environment generates a sensing signal in response to an object touch thereon, generates an event signal according to the sensing signal and a control signal, generates a cursor signal according to coordinate information of each touch point contained in the sensing signal and the event signal, and transmits the cursor signal and the event signal to the multi-touch environment. The cursor signal is used to control a cursor application to show a cursor at a screen for each touch point and changes appearances of the cursors. The cursors clearly inform a user of locations where his/her fingers correspond on the screen. By conducting touch events in the multi-touch environment through the cursors instead of actual fingers, the user can operate the touch device other than a touch screen in a multi-touch manner as operating a multi-touch screen. | 01-27-2011 |
20110012862 | SENSING METHOD AND CIRCUIT FOR A CAPACITIVE TOUCH PANEL - A sensing method for a capacitive touch panel includes charging a measure capacitor, setting the voltage across a mutual capacitor at the intersection of two traces of the capacitive touch panel, and then injecting partial charges of the measure capacitor into the mutual capacitor. When the intersection is touched, the capacitance value of the mutual capacitor is changed, and consequently the amount of charges injected into the mutual capacitor is changed. Hence, the voltage of the measure capacitor could be detected to determine whether or not the intersection is touched. | 01-20-2011 |
20100328262 | DETECTOR AND DETECTION METHOD FOR A CAPACITIVE TOUCHPAD TO IDENTIFY A REAL TOUCH POINT - A two-step detection for a capacitive touchpad to identify a real touch point first detects the self capacitances from multiple capacitance sensor traces of the capacitive touchpad to identify any touch point on the capacitive touchpad and then, if multiple touch points are detected, further detects the mutual capacitance at one of the detected touch points to identify whether it is a real touch point. | 12-30-2010 |
20100328260 | CAPACITIVE TOUCHPAD OF MULTIPLE OPERATIONAL MODES - A capacitive touchpad provides multiple operational modes including at least a key input mode, a handwriting input mode, and a mouse control mode. To switch the capacitive touchpad between the operational modes, a first pattern is defined as a mode switch for users to touch thereon. For each operational mode, specific second patterns are defined for indication of their corresponding functions, and several regions are defined corresponding to the positions of the second patterns to receive touch input from the second patterns. | 12-30-2010 |
20100302190 | MULTI-FUNCTIONAL TOUCHPAD REMOTE CONTROLLER - A multi-functional touchpad remote controller has multiple functional modes to select therefrom and has a touchpad to support touch input. Different patterns may be shown on the touchpad for different functional modes. For the current operation mode, the specific pattern shown on the touchpad allows simple and intuitive to use the multi-functional touchpad remote controller. | 12-02-2010 |
20100261505 | CONTROL METHOD FOR A CELL PHONE - Control methods for a cell phone are provided upon occurrence of a particular event, which receive a contact-related information from a touch screen of the cell phone, analyze the contact-related information to identify the contact position, the number of contact objects, or a gesture, to determine a further step to deal with the particular event. The particular event may include receipt of a call, sounding of an alarm of the cell phone, displaying of a short message on the touch screen, receipt of an interrupting call, or a standby mode of the cell phone. | 10-14-2010 |
20100200310 | GROUP SCANNING CIRCUIT AND METHOD FOR A CAPACITIVE TOUCH SENSOR - For object detection, a two-step group scan to the traces of a capacitive touch sensor is performed, thereby dramatically shortening the overall scanning time and reducing noise effect. After all the traces are scanned by the pre-scan step to find out the trace of a touch point, the trace of the touch point and traces adjacent thereto are scanned by the re-scan step for more accurate positioning of the touch point. | 08-12-2010 |
20100188364 | GHOST RESOLUTION FOR A CAPACITIVE TOUCH PANEL - Ghost resolution sensing methods are provided for capacitive touch panels. When ghost is detected involving two points on a capacitive touch panel, for each of the two points, the intersected traces at that one are concurrently charged to sense the capacitance value from either one of the intersected traces, and according thereto, a real point and a ghost point can be distinguished from each other. Alternatively, the intersected traces are crisscross driven by two synchronous and in phase signals or synchronous but out of phase signals, to sense the capacitance values at the two points. Preferably, intersectional calibration is performed in conjunction therewith, to recognize the real points. | 07-29-2010 |
20100177059 | SENSING CIRCUIT AND METHOD FOR A CAPACITIVE TOUCH PANEL - A sensing method and circuit for a capacitive touch panel sense the capacitance variation of a lateral capacitor formed at the intersection of two traces of the capacitive touch panel, to distinguish a real point from a ghost point. A sensing cycle includes two non-overlapping clock phases. In the first clock phase, the voltages across the lateral capacitor and across a sensing capacitor are set. In the second clock phase, the voltage at a first terminal of the lateral capacitor is changed, and a second terminal of the lateral capacitor is connected to a first terminal of the sensing capacitor, causing a voltage variation at a second terminal of the sensing capacitor. This voltage variation is used to determine whether the intersection is touched. The sensing method and circuit reflect the status of the lateral capacitor in real-time and prevent the location of the touch point from being misjudged. | 07-15-2010 |
20100170726 | ELECTRONIC STYLUS, CAPACITIVE TOUCHPAD MODULE, AND APPARATUS FOR TOUCH INPUT - An electronic stylus emits an excitation signal to apply to a trace of a capacitive touchpad module near a touch point when the electronic stylus touches the capacitive touchpad module, so as to change a waveform of a charging/discharging signal in the trace, and depending on the waveform variation, the capacitive touchpad module can identify the touch point. | 07-08-2010 |
20100090956 | OPTICAL MOUSE - Well-designed absolutely fixing mechanisms are provided for optical mice to avoid loose engagement between the optical components and base plate in an optical mouse, and eliminate shifting and out-of-focus of the light path in the optical mouse, thereby improving performance of the optical mouse. | 04-15-2010 |
20090310871 | DECODING METHOD FOR A TWO DIMENSIONAL DOT CODE - A decoding method for a two dimensional dot code includes the steps of defining coordinates of boundary dots in the two dimensional dot code, performing extrapolation and interpolation according to the coordinates of the boundary dots to create coordinates of a plurality of virtual code dots, and comparing a code dot in the two dimensional dot code with the virtual code dots to extract information intended to be reproduced from the two dimensional dot code. | 12-17-2009 |
20090302114 | TWO DIMENSIONAL DOT CODE, AND DECODING APPARATUS AND METHOD FOR A TWO DIMENSIONAL DOT CODE - A two dimensional dot code includes boundary dots, a direction dot and a code dot to regenerate an information therefrom. To decode the two dimensional dot code, the boundary dots and the direction dot are used to define coordinates of virtual code dots first and then, the code dot is compared with the coordinates of the virtual code dots. Thus, in order to retrieve the information represented by the two dimensional dot code, the position of the code dot can be rapidly determined without rotational correction of the image taken from the two dimensional dot code. | 12-10-2009 |