SITRONIX TECHNOLOGY CORP. Patent applications |
Patent application number | Title | Published |
20150261244 | Power Conversion System - A power conversion system in an electronic device is utilized for converting an input voltage of a power source terminal to a required voltage of a load circuit to provide power to the load circuit. The power conversion system includes a first voltage conversion circuit for converting the input voltage to the required voltage of the load circuit according to a first control signal; and a power control module for generating the first control signal according to a starting signal or a load voltage of the load circuit; wherein the load circuit receives the voltage outputted from the first voltage conversion circuit to perform operations. | 09-17-2015 |
20150205427 | DRIVING CIRCUIT, TOUCH DEVICE THEREOF, TOUCH MODULE THEREOF, AND METHOD FOR MANUFACTURING THE SAME - The present invention relates to a driving circuit, the touch device thereof the touch module thereof, and the method for manufacturing the same. The present invention comprises a control circuit, a scan circuit, a touch panel, and a detection circuit. The control circuit generates an input signal. The scan circuit comprises a plurality of signal generating circuits, which receive the input signal, generate a plurality of scan signals according to the input signal, and output the plurality of scan signals to the plurality of scan electrodes of the touch panel. The detection circuit detects the touch panel according to the plurality of scan signals and outputs a detection signal to the control circuit to let the control circuit know at least a touch point of the touch panel being touched. | 07-23-2015 |
20150137876 | Method of Reusing Electrical Energy and Related Electrical Energy reusing Circuit - The present disclosure provides a method of reusing electrical energy for a charge pump. The method comprises operating in a reusing phase after a boosting phase is completed; retrieving energy of parasitic capacitance in the reusing phase; and reusing the energy of the parasitic capacitance for an internal circuit. | 05-21-2015 |
20150116306 | METHOD OF REFRESHING MEMORY ARRAY, DRIVING CIRCUIT AND DISPLAY - A method of refreshing a memory array for a driving circuit includes generating a word-line scanning signal corresponding to a word-line of a memory array, and turning on a plurality of memory cells corresponding to the word-line of the memory array according to the word-line scanning signal to refresh the plurality of memory cells corresponding to the word-line of the memory array, wherein the memory has a first number of bit-lines and a second number of word-lines. | 04-30-2015 |
20150054810 | Voltage Calibration Circuit And Related Liquid Crystal Display Device - The present disclosure provides a voltage calibration circuit. The voltage calibration circuit includes a coupling voltage detection circuit and a common voltage circuit. The coupling voltage detection circuit is used for detecting a coupling voltage in an initial phase and generating a compensation voltage according to the coupling voltage. The common voltage circuit is used for adjusting a common voltage according to the compensation voltage and outputting the common voltage to a display module in a display phase. | 02-26-2015 |
20150049008 | POWER CIRCUIT OF DISPLAYING DEVICE - The present invention relates to a power circuit of displaying device, which comprises a timing controller, a control circuit, and a charge pump (single or multiple stages). The timing controller outputs a timing control signal to the control circuit. The control circuit outputs a clock signal or a capacitance adjusting signal according to the timing control signal. The charge pump receives the input voltage and outputs an output voltage according to the clock signal or the capacitance adjusting signal. The output voltage is provided to the scan driver for generating a plurality of scan driving signals. Accordingly, by increasing the rise rate of the output voltage of the charge pump in the voltage conversion time and reducing the rise rate of the output voltage close to the voltage holding time, the present invention can achieve the effect of reducing the power consumption. | 02-19-2015 |
20150048808 | VOLTAGE BOOSTING CIRCUIT CAPABLE OF MODULATING DUTY CYCLE AUTOMATICALLY - The present invention relates to a voltage boosting circuit capable of modulating duty cycle automatically, which comprises an inductor, a switching module, and a control circuit. The inductor is coupled to an input for receiving an input power. The switching module is coupled among the inductor, a ground, and an output for switching so that the input power can charge the inductor and produce charged energy, or for switching so that the charged energy of the inductor can discharge to the output and produce an output voltage. The control circuit outputs at least a control signal according to the charged energy and the output voltage for controlling the switching module to switch the inductor and provide the input power to the output, to switch the charged energy of the inductor to discharge to the output, or to switch the input power to charge the inductor. | 02-19-2015 |
20150048743 | POWER CIRCUIT HAVING MULTIPLE STAGES OF CHARGE PUMPS - The present invention discloses a power circuit having multiple stages of charge pumps. The power circuit comprises a first charge pump, a second charge pump, a voltage stabilizing capacitor, and an output capacitor. The first charge pump adjusts an input voltage and produces a first output voltage. The second charge pump adjusts the first output voltage, produces a second output voltage, and outputs the second output voltage for driving a loading. The voltage stabilizing capacitor is coupled between the first and second charge pumps and connected externally to the output of the first charge pump. The output capacitor is coupled to the second charge pump for providing the second output voltage. According to the present invention, the effect of supplying large transient currents to the loading can be achieved by connecting externally the voltage stabilizing capacitor to the output of the first charge pump. | 02-19-2015 |
20140368485 | DRIVING CIRCUIT OF DISPLAY PANEL AND DRIVING MODULE THEREOF, AND DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME - The present invention relates to a driving circuit for a display panel and the driving module thereof and a display device and the method for manufacturing the same. The present invention comprises a power generating module, a plurality of signal generating units, a power generating circuit, and a scan control circuit. The power generating module generates a supply power source according to an input power source. The plurality of signal generating units are coupled to the power generating module and generate a plurality of control signals according to the supply power source and a plurality of input signals. The power generating circuit generates a driving power source. The scan control circuit is coupled to the power generating circuit and the plurality of signal generating unit, and generates a plurality of scan signals according to the driving power source and at least one of the plurality of control signals. | 12-18-2014 |
20140192095 | AREA-SAVING DRIVING CIRCUIT FOR DISPLAY PANEL - The present invention relates to an area-saving driving circuit for a display panel, which comprises a plurality of digital-to-analog converting circuits convert input data, respectively, and produce a pixel signal. A plurality of driving units are coupled to the plurality of digital-to-analog converting circuits, respectively. They produce a driving signal according to the pixel signal and transmit the driving signal to the display panel for displaying. A plurality of voltage booster units are coupled to the plurality of driving units, respectively, and produce a supply voltage according to a control signal. Then the supply voltage is provided to the plurality of driving units. Thereby, by providing the supply voltage to the plurality of driving units of the display panel by means of the plurality of voltage booster units, the area of the external storage capacitor is reduced. Alternative, the external storage capacitor can be even not required. | 07-10-2014 |
20140192094 | DRIVING CIRCUIT OF DISPLAY PANEL AND DRIVING MODULE THEREOF, AND DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME - The present invention relates to a driving circuit of a display panel. A plurality of driving units produce a reference driving voltage according to a gamma voltage of a gamma circuit, respectively. A plurality of digital-to-analog converting circuits receive the reference driving voltages output by the plurality of driving units, and select one of the plurality of reference driving voltage as a data driving voltage according to pixel data, respectively. The plurality of digital-to-analog converting circuits transmit the plurality of data driving voltages to the display panel for displaying images. A voltage boost circuit is used for producing a first supply voltage and providing the first supply voltage to the plurality of digital-to-analog converting circuits. At least a voltage boost unit is used for producing a second supply voltage and providing the second supply voltage to the plurality of driving units. | 07-10-2014 |
20140145734 | Capacitor Sensing Circuit - The present invention provides a capacitor sensing circuit, comprising a driving unit, a switching unit, a differential integrator circuit, and a post-processing circuit. The driving unit is for providing driving signals and timing required by the capacitor sensing circuit, the switching unit switches signals according to two inverting timings, φ | 05-29-2014 |
20140118234 | DECODING AND SCAN DRIVER - The present invention relates to a decoding and scan driver, which comprises a level-shift circuit, a decoding circuit, an output driving circuit, and a control circuit. The level-shift circuit receives a plurality of input signals and shifts the voltage levels of the plurality of input signals for producing a plurality of decoding control signals. The decoding circuit is coupled to the level-shift circuit and produces a plurality of decoding signals according to the plurality of decoding control signals. The output driving circuit is coupled to the decoding circuit, produces a driving signal sequentially according to the plurality of decoding signals, and outputs the driving signal for driving a display panel. The control circuit is coupled to the output driving circuit, produces a control signal according to one of the plurality of input signals, and transmits the control signal to the output driving circuit for controlling the output driving circuit to output the driving signal. Thereby, the circuit area of the decoding and scan driver is saved and the cost is thus reduced. | 05-01-2014 |
20140105321 | TRANSMISSION INTERFACE DEVICE CAPABLE OF CALIBRATING TRANSMISSION FREQUENCY AUTOMATICALLY AND METHOD THEREOF - The present invention relates to a transmission interface device capable of calibrating the transmission frequency automatically, which comprises a clock generating unit, a data transmission unit, and a control unit. The clock generating unit is used for generating an operating clock, which determines a transmission frequency. The data transmission unit is used for connecting to a host and transmitting a plurality of data to the host or receiving the plurality of data from the host according to the operating clock. When the host or the data transmission unit detects transmission errors in the plurality of data, the host or the data transmission unit generates an error handling. The control unit generates an adjusting signal according to the error handling and transmits the adjusting signal to the clock generating unit for adjusting the transmission frequency of the operating clock. | 04-17-2014 |
20140098080 | DRIVER CIRCUIT FOR DOT INVERSION OF LIQUID CRYSTALS - A driver circuit for dot inversion of liquid crystals includes a positive source supplying a first positive signal and a second positive signal; a negative source supplying a first negative signal and a second negative signal; a first selector unit connected with the sources to receive the first positive signal and the first negative signal; a second selector unit connected with the sources to receive the second positive signal and the second negative signal; a first source connected with the selection unit to alternatively output a first positive voltage and a first negative voltage; a second source connected with the selection unit to alternatively output a second positive voltage and a second negative voltage. When the first source outputs the first positive voltage, the second source outputs the second negative voltage. When the first source outputs the first negative voltage, the second source outputs the second positive voltage. | 04-10-2014 |
20140049459 | AREA-SAVING DRIVING CIRCUIT FOR DISPLAY PANEL - The present invention relates to an area-saving driving circuit for a display panel, which comprises a plurality of digital-to-analog converting circuits convert input data, respectively, and produce a pixel signal. A plurality of driving units are coupled to the plurality of digital-to-analog converting circuits, respectively. They produce a driving signal according to the pixel signal and transmit the driving signal to the display panel for displaying. A plurality of voltage booster units are coupled to the plurality of driving units, respectively, and produce a supply voltage according to a control signal. Then the supply voltage is provided to the plurality of driving units. Thereby, by providing the supply voltage to the plurality of driving units of the display panel by means of the plurality of voltage booster units, the area of the external storage capacitor is reduced. Alternative, the external storage capacitor can be even not required. | 02-20-2014 |
20140021331 | PROXIMITY SENSING METHOD - The present invention relates to a proximity sensing method for proximity sensing unit in a mobile device. The proximity sensing method comprises steps of comparing a sensed value of the proximity sensing unit with a predetermined offset value or a first predetermined range to determine if the sensed value is smaller than the predetermined offset value or if the sensed value is within the first predetermined range; and providing an offset value for confirming if an object is near the mobile device according to the determination that if the sensed value is smaller than the predetermined offset value or within the first predetermined range. | 01-23-2014 |
20130321363 | SCAN DRIVING CIRCUIT - The present invention relates to a scan driving circuit, which comprises a decoding circuit, a plurality of level-shift driving circuits, and a control circuit. The decoding circuit produces a decoding signal according to a decoding control signal. The plurality of level-shift driving circuits are coupled to the decoding circuit and produce scan signal sequentially according to the decoding signal. The control circuit is coupled to the plurality of level-shift driving circuit. The control circuit produces a first control signal and a second control signal according to the decoding control signal and transmits the first and second control signals to the plurality of level-shift driving circuits for controlling their turning on and off. Accordingly, by means of the control circuit according to the present invention, the circuit area of each level-shift driving circuit can be reduced, and thus the cost can be reduced as well. | 12-05-2013 |
20130278639 | DISPLAY PANEL AND DRIVING CIRCUIT THEREOF - The present relates to a display panel and the driving circuit thereof. A scan driving circuit of the driving circuit of the display panel according to the present invention produces a plurality of scan signal for scanning a plurality of pixel structures of the display panel. In addition, a data driving circuit produces a plurality of data signals corresponding to the plurality of scan signals and transmits the plurality of data signals to the plurality of pixel structures, where a common electrode of the plurality of pixel structures is coupled to a ground. Moreover, the data driving circuit according to the present invention adjusts the signal levels of a plurality of gamma voltages according to a compensation signal of a compensation circuit, and thus further adjusting the levels of the data signals. | 10-24-2013 |
20130278584 | DRIVING CIRCUIT OF DISPLAY PANEL CAPABLE OF ELIMINATING FLASH - The present invention relates to a driving circuit of display panel capable of eliminating flash, which comprises a scan driving circuit and a data driving circuit. The scan driving circuit produces a plurality of scan signals for scanning a plurality of pixel structures of the display panel. The data driving circuit produces a plurality of data signals for transmitting the plurality of data signals to the plurality of pixel structures when the plurality of pixel structures are scanned. When the data driving circuit transmits the plurality of data signals to the plurality of pixel structures, the data driving circuit adjusts the voltage levels of the data signals of the plurality of pixel structures to be symmetrical to a common voltage of the plurality of pixel structures. | 10-24-2013 |
20130271446 | DRIVING CIRCUIT FOR DISPLAY PANEL - The present invention provides a driving circuit for display panel, which comprises a power supply circuit and a driving unit. The power supply circuit outputs a driving power supply voltage. The driving unit produces a driving signal according to a data signal and the driving power supply voltage for driving the display panel. In addition, the voltage level of the driving power supply voltage increases to a predetermined level. Thereby, during the process of charging the display panel by the data driving circuit, the driving power supply voltage output by the power supply circuit increases from a low level to a predetermined level for reducing the power consumption of the driving circuit. | 10-17-2013 |
20130234989 | TOUCH PANEL WITH DISCHARGING FUNCTION - The present invention relates to a touch panel with a discharging function, which comprises a scanning bus, a sensing bus, a control unit, and a discharging circuit. The scanning bus is used for scanning a touch frame. The sensing bus interleaves with the scanning bus, and senses at least a touched location on the touch frame. The control unit is coupled to the scanning bus and the sensing bus | 09-12-2013 |
20130234738 | SENSING STRUCTURE OF TOUCH PANEL - The present invention relates to a sensing structure of touch panel, which comprises a plurality of electrode groups disposed on a substrate. The substrate has a first side and a second side. Each electrode group comprises a first external electrode, a second external electrode, a plurality of internal electrodes, and a plurality of wires. The first external electrode is disposed on a first side; the second external electrode is disposed on the second side; the plurality of internal electrodes are disposed between the first external electrode and the second external electrode; and the plurality of wires are disposed on both sides of the electrode group alternately. Thereby, by disposing the first external electrode, the second external electrode, and the internal electrodes, all being zigzag, the disposable number of electrodes in each electrode group is increased. Accordingly, the sensitivity of touch sensing for the sensing structure of touch panel is enhanced. | 09-12-2013 |
20130181965 | DRIVING CIRCUIT FOR PANEL - The present invention provides a driving circuit for panel, which comprises a gamma voltage generating circuit, a plurality of selecting units, and at least a source driving circuit. The gamma voltage generating circuit generates a plurality of gamma voltages for the plurality of selecting units. The plurality of selecting units outputs the plurality of gamma voltages generated by the gamma voltage generating circuit using the time-division method according to selection data to the source driving circuit. According to display data, the source driving circuit selects to receive the gamma voltage of an output of the plurality of selecting units as a target voltage. In addition, the source driving circuit produces a driving signal according to the target voltage for driving a panel. | 07-18-2013 |
20130150001 | Mobile device - The present invention discloses a mobile phone comprising a gravity sensor, a processor, and a memory. The gravity sensor senses inertia data along a specific direction, the processor couples with the gravity sensor and receives a output signal from the gravity sensor, and the memory stores at least one personal information and operates under the processor's control. When either the gravity sensor or the processor detects a vertical free-fall motion, the processor performs a information security process to lock the personal information to become inaccessible. | 06-13-2013 |
20130135132 | ANALOG-TO-DIGITAL CONVERTER - The present invention provides an analog-to-digital converter, which comprises an integration circuit, a threshold signal generating circuit, a main comparison circuit, a sub comparison circuit, a counter, and a decoder. The integration circuit integrates an input signal and produces an integration signal. The threshold signal generating circuit generates a main threshold signal and a plurality of sub threshold signals. The main comparison circuit produces a plurality of main comparison signals according the integration signal and the main threshold signal. The sub comparison circuit produces a plurality of sub comparison signals according to the integration signal and the plurality of sub threshold signals. The counter counts the plurality of main comparison signals and produces a first counting signal. The decoder decodes the plurality of sub comparison signals and produces a second count signal. The first count signal and the second count signal are used for producing a digital signal. | 05-30-2013 |
20130127533 | OPERATIONAL AMPLIFIER HAVING LOW POWER CONSUMPTION - The present invention relates to an operational amplifier having low power consumption, which comprises a differential circuit, an output-stage circuit, and a floating bias generating circuit. The differential circuit receives an input signal and produces a control signal. The output-stage circuit is coupled to the differential circuit and produces an output signal according to the control signal. The floating bias generating circuit is coupled between the differential circuit and the output-stage circuit and generates a floating bias according to the control signal for controlling the rising or lowering of the voltage level of the output signal. Accordingly, the operational amplifier can charge and discharge rapidly, and thus extending the applications of the operational amplifier. Besides, the floating bias generating circuit can limit the output current while the operational amplifier is driving, and thus achieving the purpose of low power consumption. | 05-23-2013 |
20130113574 | OSCILLATING DEVICE - The present invention relates to an oscillating device, which comprises a driving module and an oscillating module. The driving module is used for producing a first driving voltage and a second driving voltage. The oscillating module comprises a first symmetric load circuit, a second symmetric load circuit, and a bias circuit. The first symmetric load circuit and the second symmetric load circuit produce a bias according to the first driving voltage. The bias circuit produces a bias current according to the second driving voltage. The oscillating module produces an oscillating signal according to the first driving voltage and the bias current, where the bias current is proportional to the bias. Thereby, by making the driving signal produced by driving module proportional to the bias of the oscillating module, simple compensation for temperature and process can be performed. Thereby, the frequency can be tuned using a few calibration bits. | 05-09-2013 |
20130093735 | DRIVING METHOD FOR LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING CIRCUIT THEREOF - A driving method and circuit for a liquid crystal display (LCD) device. The LCD device has a plurality of scan groups and data electrodes. Each scan group has scan electrodes. The scan driving circuit initially provides scan signals to the scan electrodes of the scan groups. Each scan signal includes a select signal and a non-select signal, a select cycle, and a non-select cycle. The select signal is located in the select cycle, while the non-select signal, the non-select cycle. When an Nth scan electrode is located in the select cycle, an (N−1)th or (N+1)th scan electrode of the scan electrodes is located in the non-select cycle. The data driving circuit then provides a data signal to each of the data electrodes according to display data for driving the LCD device to display an image by using the scan signals and the data signals. | 04-18-2013 |
20130068016 | APPARATUS AND METHOD FOR IDENTIFYING MOTION OF OBJECT - The present invention relates to an apparatus for identifying motions of an object, which is used for detecting motions of at least an object. A sensing plate senses the object and produces at least a sensing signal. A processing circuit is coupled to the sensing plate. It gives at least a moving speed along at least one axis, at least a variation in the sensed value between the object and the sensing plate, or at least a variation in the contact area according to the sensing signal. Then it produces a corresponding control signal according to the moving speed, the variation in the sensed value, or the variation in the contact area. Thereby, the present invention further produces a corresponding control signal by means of the variations in the sensed value. Hence, the control signal can be produced without touching the touch panel and thus increasing the lifetime of the touch panel. | 03-21-2013 |
20130042686 | INERTIA SENSING APPARATUS - The invention relates to an inertia sensing apparatus, comprising a substrate, a first and second inertia sensing elements. The first inertia sensing element is connected to a substrate and has a containment space. The second inertia sensing element is connected to the substrate and is disposed in the containment space of the first inertia sensing element, wherein the first inertia sensing element and the second sensing element are connected to the substrate, and the first inertia sensing element and the second sensing element are not connected to each other, the first inertia sensing element and the second sensing element individually and independently detect at least one inertia motion of the inertia sensing apparatus. Therefore, the invention is based on the second inertia sensing element disposed in the containment space of the first inertia sensing element and they individually and independently detect at least one inertia motion of the inertia sensing apparatus, so as to decrease an area of the inertia sensing apparatus, thus reducing the chip size and prevent the two inertia sensing elements from coupling to result in decreasing the sensing precision. | 02-21-2013 |
20130038394 | OPERATIONAL AMPLIFIER - The present invention relates to an operational amplifier comprising an input-stage circuit, a floating current mirror circuit, and an output-stage circuit. The input-stage circuit receives an input signal and produces a control signal. The floating current mirror circuit is coupled to the input-stage circuit, and produces a mirror current according to the control signal. The output-stage circuit is coupled to the floating current mirror circuit, and produces a driving signal according to the mirror current. When the operational amplifier is operating in the static mode, the output-stage circuit further produces a static current according to the mirror current. Thereby, by using the floating current mirror circuit, the purpose of low power consumption can be achieved while driving to the high-voltage mode or to the low-voltage mode. | 02-14-2013 |
20130009618 | VOLTAGE CONVERTER - The present invention relates to a voltage converter, which uses an inductor coupled between a power supply and a reference voltage for providing a supply voltage. A plurality of output capacitors are coupled to both sides of the inductor, respectively, and receive the supply voltage for producing a positive voltage and a negative voltage. A plurality of output switches are coupled to both sides of the inductor, respectively, and control the inductor to charge the plurality of output capacitors. A feedback control circuit produces a control signal according to the positive and negative voltages for controlling the plurality of output switches. Thereby, the present invention can produce positive and negative voltage by means of the inductor. Accordingly, the voltage converter according to the present invention avoids usage of multiple inductors and capacitors in producing voltages with different levels, and thus reducing the circuit area as well as the manufacturing cost. | 01-10-2013 |
20120313891 | DISTANCE SENSING CIRCUIT AND TOUCH-CONTROL ELECTRONIC APPARATUS - The present invention discloses a distance sensing circuit and a touch-control electronic apparatus. The touch-control electronic apparatus includes a distance sensing circuit. The distance sensing circuit comprises a distance sensing unit, a capacitive sensing unit, and an operation unit. The distance sensing unit senses the distance between an object and the touch-control electronic apparatus and generates a first sensing signal. The capacitive sensing unit generates a second sensing signal corresponding to the object. The operation unit judges the distance between the touch-control electronic apparatus and the object according to the first and the second sensing signals. The touch-control electronic apparatus according to the present invention can truly judge the distance between itself and the object by means of the distance sensing unit and the capacitive sensing unit for controlling touch-control functions of the touch-control electronic apparatus. | 12-13-2012 |
20120303295 | DIRECTION SENSING APPARATUS - The direction sensing apparatus according to the present invention comprises a sensing circuit, a computing module, and a judging unit. The sensing circuit detects the gravity direction of an object and produces at least a detecting signal. The computing module receives the detecting signal, and produces at least a computing value according to at least a threshold value and the detecting signal. The judging unit receives the computing value, and gives a state of gravity direction of the object according to the computing value. Thereby, the present invention shrinks the area of circuits and hence saving cost by means of the simple circuit structure of the computing module. | 11-29-2012 |
20120256873 | SENSING STRUCTURE OF TOUCH PANEL - The present invention relates to a sensing structure of touch panel, which comprises a plurality of first electrode groups are located on a first side of a substrate. The bottom of each first electrode is located on the first side and extends towards a second side. A plurality of extended electrode groups are connected to the plurality of first electrode groups, respectively. The bottom of each extended electrode is located on the second side and extends towards the first side. The plurality of second electrode groups are located on the substrate. A first sub-electrode of each second electrode is interleaved with and insulated electrically from each extended electrode. The plurality of third electrode groups are located on the substrate and have a plurality of third electrodes. A first sub-electrode of the third electrode is interleaved with and insulated electrically from the second sub-electrode of the second electrode. | 10-11-2012 |
20110291870 | ANALOG-TO-DIGITAL CONVERTING CIRCUIT - The present invention relates to an analog-to-digital converting circuit, which comprises an integrating circuit, a reference signal generating circuit, a comparator, and a first counting circuit. The integrating circuit integrates an input signal for producing an integration signal. The reference signal generating circuit produces a plurality of reference signals. The comparator receives the integration signal and the plurality of reference signals, and compares the integration signal to the plurality of reference signals sequentially for producing a plurality of comparison signals. The first counting circuit receives the plurality of comparison signals produced by the comparator, and starts to count the plurality of comparison signals for producing a reset signal and resetting the integrating circuit. Because the integrating circuit is not reset once until the comparator produces the plurality of comparison signals, the number of times of resetting the integrating circuit can be reduced, and hence reducing the integral nonlinearity effect. Accordingly, the accuracy of the analog-to-digital converting circuit is enhanced. | 12-01-2011 |
20110290987 | AMBIENT LIGHT SENSING MODULE - The present invention provides an ambient light sensing module, which comprises a sawtooth signal generating circuit, an optical sensing unit, and a comparing unit. The sawtooth signal generating circuit produces a sawtooth signal. The optical sensing unit senses a light source and produces a light-sensing signal. The comparing unit produces a pulse-width modulation (PWM) signal related to the intensity of the light source according to the light-sensing signal and the sawtooth signal so that the PWM signal can be used as the control signal of the electronic device. The ambient light sensing module further comprises at least a fuse for determining a processing parameter. A signal processing unit processes the light-sensing signal according to the processing parameter for outputting a converting signal. The comparing unit compares the converting signal with the sawtooth signal for producing the PWM signal. An adjusting unit produces an adjusting signal according to the PWM signal and the light intensity or according to the converting signal and the light intensity for controlling a trimming unit to trim the fuse and thus modifying the processing parameter. | 12-01-2011 |
20110122076 | POSITION DETECTION APPARATUS FOR A TOUCH PANEL - The present invention provides a position detection apparatus for a touch panel. The apparatus includes at least one light source disposed on at least a first edge of the touch panel for illumination of a surface of the touch panel, a first detector disposed on one end of a second edge of the touch panel, and a second detector disposed on the other end of the second edge of the touch panel, wherein each of the first and second detectors comprises a plane mirror reflecting an image from the surface of the touch panel and an image sensor for acquisition of the image from the plane mirror, and a position where a pointer touches the touch panel is determined according to the images acquired by the image sensors of the first and second detectors. | 05-26-2011 |
20110084711 | CAPACITANCE SENSING CIRCUIT WITH ANTI-ELECTROMAGNETIC INTERFERENCE CAPABILITY - The present invention relates to a capacitance sensing circuit with anti-EMI capability. A filter is coupled to a capacitor under test; receives a plurality of reference signals; and produces a first filter signal and a second filter signal. A difference circuit receives the first and second filter signals; eliminates the common-mode noise in the first and second filter signals; and produces a difference signal. The amplitude of the difference signal is related to the capacitance value of the capacitor under test. Thereby, the purpose of sensing capacitance can be achieved. In addition, by eliminating common-mode noise using the difference circuit, the anti-EMI capability can be achieved. Because the difference circuit can adjust the dynamic range of the output of the filter, the capacitance sensing circuit with anti-EMI capability can achieve capacitance sensing in few clock cycles. | 04-14-2011 |
20100321320 | TOUCH PANEL WITH DISCHARGING FUNCTION - The present invention relates to a touch panel with a discharging function, which comprises a scanning bus, a sensing bus, a control unit, and a discharging circuit. The scanning bus is used for scanning a touch frame. The sensing bus interleaves with the scanning bus, and senses at least a touched location on the touch frame. The control unit is coupled to the scanning bus and the sensing bus | 12-23-2010 |
20100231271 | CIRCUIT FOR DRIVING A DISPLAY PANEL USING A DRIVING CAPACITOR - The present invention provides a circuit for driving a display panel using a driving capacitor, comprising an analog-to-digital converter receiving an analog input signal to generate a digital signal, a driving capacitor receiving the digital signal to generate a driving signal for the display panel, and a switching circuit in response to a switching signal, selectively coupling the analog-to-digital converter to the driving capacitor for transmission of the digital signal and coupling the driving capacitor to the display panel for transmission of the driving signal. Thus, the circuit area needed for a source driver processing images of large bit number is reduced, which decreases the cost. Further, the power system of the display having a large dynamic range of voltage can be also simplified. | 09-16-2010 |
20100220072 | MODULIZED TOUCH PANEL - A modulized touch panel is revealed. The modulized touch panel includes a first substrate layer and a second substrate layer while the second substrate layer is corresponding to the first substrate layer A touch panel is integrated with a control chip so as to reduce complexity and occupied area of the circuit that transmits signals between electronic devices and the touch panel while increasing scan lines of the touch panel. Thus circuit of electronics is simplified. Moreover, the first substrate layer or the second substrate layer of the touch panel is disposed with a metal layer for reducing impedance and improving signal stability. | 09-02-2010 |