Patent application number | Description | Published |
20080284498 | Type of Charge Pump Apparatus and Power Source Circuit - This invention discloses charge pump apparati, where a charge pump apparatus, including a positive charge pump circuit and a negative charge pump circuit, providing multiple positive and negative voltages, comprises: a capacitor set shared by said positive charge pump circuit and said negative charge pump circuit; multiple electronic switches connected to said capacitor set and a plurality of voltage sources; multiple output capacitors connected to selected ones of said multiple electronic switches and one or more output terminals; and a non-overlapping time sequence that controls the on and off states of said multiple electronic switches; wherein under the control of said non-overlapping time sequence, corresponding electronic switches are turned on and off to control the output of the positive and negative voltages provided by said output capacitors to generate output voltages that are pre-determined multiples of the one or more input voltages. With this invention, coupling capacitors are shared during the processes of charging and discharging, and operate at alternating intervals through time sequence-control. As a result, both positive and negative output voltages can be simultaneously adjusted to provide different boost levels. The charge pump is both low in cost and has a design that is simple and easy to produce. | 11-20-2008 |
20080291191 | Power source circuits for driving liquid crystal displays - This invention is suitable for use in the field of integrated circuits. It provides a type of power source circuit. Said power source circuit includes: a charge pump circuit used to operate the charge pump to produce driving voltages; a first control circuit, used in the closed-loop control of said charge pump circuit to produce a positive high voltage; a bias-ratio circuit, used with the positive high voltage and the zero-potential voltage produced by the first control circuit to produce a positive sub-high voltage and a lowest positive high voltage; and a second control circuit, used in accordance with the positive sub-high voltage and the lowest positive high voltage produced by said bias-ratio circuit in the closed-loop control of said charge pump circuit to produce a negative high voltage. Using this invention, the system contains no voltage higher than the liquid crystal's driving voltages, and also does not contain any lower negative voltage than the liquid crystal's highest negative driving voltage, thereby reducing the circuit's electrical consumption. | 11-27-2008 |
20090167747 | TFT-LCD DRIVER CIRCUIT AND LCD DEVICES - Thin film transistor liquid crystal display (TFT-LCD) driver circuit having a source drive buffer with an operational power amplifier having two differential amplifiers capable of alternating operation according to timing and bias voltage signals. The differential amplifiers are further capable of functioning as a voltage follower by inputting and outputting voltage signals from a digital to analog converter for charging display points. The TFT-LCD driver circuit may also be incorporated within a LCD device. | 07-02-2009 |
20090278811 | Touch-Sensitive Screen and a Touch-Sensitive Device Using the Same - A touch-sensitive screen and a resistance touch-sensitive device using the same, wherein said screen comprises: an insulating substrate, a rectangular conducting layer formed on said insulating substrate, a conducting layer electrode array formed on the four edges of said conducting layer, a conductive coat formed on said conducting layer, and a conductive coat electrode wherein, at least 3 pairs of the conducting layer electrodes are deployed in said conducting layer electrode array; each pair of the conducting layer electrodes are deployed on the parallel edges of the conducting layer symmetrically; and the conducting layer electrode is set on each edge of the conducting layer. As the conducting layer electrodes are deployed symmetrically on the parallel edges of the conducting layer, the electric filed lines tends to be evenly distributed when the voltage is loaded onto the edges of the conducting layer; thus the linearity of the equipotential lines is enhanced. | 11-12-2009 |
20100051433 | Multi-point touch-sensitive device - A touch-sensitive device includes a first conductive layer and a second conductive layer. The first conductive layer has at least a first edge and a second edge. The second edge is substantially parallel to the first edge and there is a voltage drop across the first conductive layer between the first edge and the second edge when a power supply is coupled to the first edge and the second edge. The second conductive layer is separated from the first conductive layer by a spacer layer. The second conductive layer includes multiple electrically isolated conductive regions. When a plurality of the conductive regions are in contact with the first conductive layer simultaneously, each of the plurality of the conductive regions generates an output signal and the magnitude of the output signal depends at least in part upon the conductive region's position relative to the first and second edges. | 03-04-2010 |
20100053093 | Multi-point touch-sensitive system - A multi-touch detection system includes a touch-sensitive device, a microcontroller coupled to the touch sensitive device, and an electronic application coupled to the microcontroller. The touch-sensitive device includes multiple electrically isolated conductive regions and the conductive regions are configured to detect multiple contacts from a user simultaneously and generate respective output signals for the multiple user contacts. The microcontroller is configured to receive the output signals from the conductive regions and generate one or more control signals in response to the output signals. The electronic application includes a screen displaying multiple human-machine interactive objects and a signal processor. The signal processor is configured to receive the control signals from the microcontroller and alter the appearance of the human-machine interactive objects on the screen in accordance with the control signals. | 03-04-2010 |
20100053094 | Method of operating a multi-point touch-sensitive system - A computer-implemented method in connection with a multi-touch detection system is disclosed. The multi-touch detection system includes a touch-sensitive device, a microcontroller coupled to the touch sensitive device, and an electronic application coupled to the microcontroller. The touch-sensitive device has multiple electrically isolated conductive regions. In response to detecting multiple simultaneous contacts a user has with the conductive regions, the touch-sensitive device generates multiple output signals, one signal for each of the multiple simultaneous contacts, and transmits the output signals to the microcontroller. The microcontroller is configured to generate one or more control signals in response to the output signals and transmit the control signals to the electronic application. The electronic application includes a screen displaying multiple human-machine interactive objects. In response to the control signals, the electronic application alters the appearance of the human-machine interactive objects on the screen. | 03-04-2010 |
20100262424 | Method of Eliminating Background Noise and a Device Using the Same - The present invention provides a method of eliminating background noise and a device using the same. The method of eliminating background noise comprises the steps of: detecting an effective value of a received audio signal, and generating an average power signal of the received audio signal; generating a noise eliminating control signal by comparing the average power signal with a first threshold; and eliminating the noise, and amplifying the voice signal using the noise eliminating control signal. A device of eliminating background noise comprises a detecting unit, which is configured to detect an effective value, and generate an average power signal of the received audio signal; a first signal generating unit, which is configured to generate a noise eliminating control signal; and an amplifying unit, which is configured to eliminate the noise, and amplify the voice signal. | 10-14-2010 |
20110025615 | Touchpad with a Double-Layer Printed Circuit Board Structure - The present invention provides a touchpad with a double-layer printed circuit board structure. The touchpad comprises an upper layer, a bottom layer, a first conductor; and a second conductor; wherein the upper layer is configured to act as a touch-sensitive zone, and comprises a plurality of first conductive units, a first conductive wire and a plurality of second conductive units; the bottom layer comprises a wire connecting zone and a component zone, wherein the wire connecting zone further includes a second conductive wire and a connecting line configured to be electrically coupled to the component zone; and the first conductor and the second conductor are configured to connect the upper layer to the bottom layer; wherein the first and the second conductive units are each serially-connected to form a first touch-sensitive line and a second touch-sensitive line, respectively. | 02-03-2011 |
20110026733 | DEVICE FOR CANCELLING BACKGROUND NOISE AND METHOD THEREOF - A method for cancelling background noise of an audio device comprises determining characteristic values of an audio signal to construct a characteristic signal reflecting a change trend of the audio signal, multiplying the determined characteristic signal with the audio signal to construct a multiplication signal, and amplifying the multiplication signal. | 02-03-2011 |
20110069028 | METHOD AND SYSTEM FOR DETECTING GESTURES ON A TOUCHPAD - A method for detecting gestures on a touchpad is presented. The method comprises receiving a first contact signal induced by a first contact with the touchpad, detecting a drop in the first contact signal induced by a first lift off the touchpad, recording a first time interval between receipt and drop in the first contact signal, comparing the first time interval to a first reference and a second reference, wherein the first reference is less than the second reference, and the first reference and second reference are predefined, and outputting one of a single-click signal, double-click signal or drag signal. | 03-24-2011 |
20110128251 | METHOD AND SYSTEM FOR DETECTING A CONTACT ON A TOUCH SCREEN - A method of detecting a contact on a touch-screen panel including a plurality of touch-sensitive units arranged on a touch-sensitive surface. The method comprises receiving at least two induction signals induced by a contact of an object with the touch-sensitive surface at a point in between at least two adjacent touch-sensitive units. The at least two adjacent touch-sensitive units include a first touch-sensitive unit and a second touch-sensitive unit. The at least two induction signals include a first induction signal induced by contact with the first touch-sensitive unit and a second induction signal induced by contact with the second touch-sensitive unit. The method further comprises combining the first and second induction signals to produce at least part of a touch signal, and processing the touch signal to generate a control signal and outputting the control signal to a terminal application device to enable user to view data from coordinates of the contact point. | 06-02-2011 |
20110181623 | SCROLLING CONTROL METHOD FOR A TOUCH DEVICE AND DEVICE USING THE SAME - A scrolling control method for a touch device, comprising the steps of: selecting a scrolling region on the touch device; defining at least two sections on the scrolling region; detecting touches of an object on at least two different sections successively, the time span between the touches of the object on the two sections corresponding a displacement; and controlling a scroll bar to scroll the displacement according to the operation of the object on a window of the touch device. | 07-28-2011 |
20110185310 | METHOD AND SYSTEM FOR DETECTING A FINGER CONTACT ON A TOUCHPAD - A method for executing a scroll control operation on a touchpad comprises receiving a first contact signal induced by a first contact with a first section of the touchpad, receiving a second contact signal induced by a second contact with a second section of the touchpad, the first section and second section being predefined in a scrolling region on the touchpad, recording a first direction from the first contact to the second contact, and a first distance between the first section and the second section and outputting a scroll control signal to execute a scroll operation, the scroll control signal including information of the first direction and first distance. | 07-28-2011 |
20120075234 | METHOD AND SYSTEM FOR DETECTING ONE OR MORE OBJECTS - A method for detecting one or more objects is disclosed. In one embodiment, the method comprises the steps of: receiving one or more induction signals caused by at least one object along one or more directions; comparing each received induction signal with a reference to detect at least one upward trend and/or at least one downward trend in the induction signal; and determining the number of objects based on the number of upward trend and/or downward trend in each received induction signal. A device for detecting one or more objects on a touch device is also disclosed. | 03-29-2012 |
20120249440 | METHOD OF IDENTIFYING A MULTI-TOUCH ROTATION GESTURE AND DEVICE USING THE SAME - A method of identifying a rotation gesture comprises detecting one or more induction signals induced by one or more pointing objects that come into contact with a touch-sensitive surface, determining the number of pointing objects, detecting movement statuses of the detected pointing objects, determining a rotation gesture performed by the pointing objects based on the movement statuses, generating a control signal associated with the determined rotation gesture and executing the rotation gesture in response to the generated control signal. | 10-04-2012 |
20120249448 | METHOD OF IDENTIFYING A GESTURE AND DEVICE USING THE SAME - A method of identifying gestures on a touchpad comprises determining a first time interval between receipt and drop in a first contact signal induced by a first contact with the touchpad, recording a first start touch point and a first end touch point associated with the receipt and drop in the first contact signal, determining a gesture according to the first time interval, the first start touch point and the first end touch point and generating a control signal associated with the determined gesture. | 10-04-2012 |
20120249471 | METHOD OF IDENTIFYING A MULTI-TOUCH ROTATION GESTURE AND DEVICE USING THE SAME - A method of identifying a rotation gesture comprises detecting one or more induction signals induced by one or more pointing objects that come into contact with a touch-sensitive surface, determining the number of the pointing object that come into contact with a touch screen, determining a rotation gesture performed by the pointing objects if the number of the pointing object is more than one, generating a control signal associated with the determined rotation gesture and executing a rotation command in response to the generated control signal. | 10-04-2012 |
20120249487 | METHOD OF IDENTIFYING A MULTI-TOUCH SHIFTING GESTURE AND DEVICE USING THE SAME - A method of identifying a shifting gesture comprises detecting one or more induction signals induced by one or more pointing objects that come into contact with a touch-sensitive surface, determining the number of the pointing objects that come into contact with the touch-sensitive surface, recording moving status and coordinates of each pointing object in an instance in which the number of the pointing objects is larger than a preset number, determining whether one pointing object moves in a direction parallel to the direction that another pointing object moves in according to the recorded moving status and the coordinates of the pointing objects and generating control signals to execute a gesture associated with the determined result. | 10-04-2012 |
20120249599 | METHOD OF IDENTIFYING A MULTI-TOUCH SCALING GESTURE AND DEVICE USING THE SAME - A method of identifying a scaling gesture comprises detecting one or more induction signals induced by one or more pointing objects that come into contact with a touch-sensitive surface, determining the number of the pointing object, determining a scaling gesture, generating a control signal associated with the determined scaling gesture and executing the scaling gesture in response to the generated control signal. | 10-04-2012 |
20130154493 | DIMMING CONTROLLING CIRCUIT FOR LED - A dimming controlling circuit for LED includes: a switch configured to connect a main circuit and a power grid; a switch-on duration controlling circuit configured to output a switch-on duration controlling signals according to action times of the switch; a switch-off controlling circuit configured to output a switch-off controlling signal according to a comparison result of the voltages of the switch-on duration controlling signal and of a signal from a terminal of a switch transistor in the main circuit; a switch-on controlling circuit configured to generate a switch-on controlling signal after a first preset duration since receiving the switch-off controlling signal; and a logic unit configured to output a switch transistor controlling signal. | 06-20-2013 |
20140082546 | INPUT METHOD, INPUT APPARATUS, AND TERMINAL DEVICE - An input method is provided by embodiments of the present invention, relating to the communications field, and invented to improve the input experience of a user. The input method includes: providing an input interface on a touch display screen, where the input interface includes a virtual soft keyboard distributed in a sector area around a lower left corner or lower right corner of the input interface; receiving an input instruction which is input by a user through the virtual soft keyboard; and displaying input information corresponding to the input instruction. An input apparatus and a terminal device are also provided by embodiments of the present invention. The present invention is applicable to a mobile device or a handheld device. | 03-20-2014 |
20140168159 | INDUCTION UNIT, TOUCH DETECTING ASSEMBLY AND TOUCH SENSITIVE DEVICE - An induction unit, a touch detecting assembly, and a touch sensitive device are provided. The touch sensitive device comprises: a substrate ( | 06-19-2014 |
20140198265 | INDUCTION UNIT, TOUCH DETECTING ASSEMBLY AND TOUCH SENSITIVE DEVICE - A touch detecting assembly, a touch sensitive device, and a portable electronic apparatus are provided. The touch detecting assembly ( | 07-17-2014 |