Patent application number | Description | Published |
20090135116 | GAMMA REFERENCE VOLTAGE GENERATING DEVICE AND GAMMA VOLTAGE GENERATING DEVICE - A gamma reference voltage generating device and a gamma voltage generating device are provided herein. The gamma reference voltage generating device includes a reference voltage source and a selector. The reference voltage source has a first terminal and a second terminal respectively coupled to a first adjustable voltage and a second adjustable voltage for providing a plurality of reference voltages. The selector selectively outputs one of the reference voltages as a gamma reference voltage according to a selecting signal. By regulating the first and the second adjustable voltage, the range of the reference voltages provided by the reference voltage source can be adjusted so as to adjust the gamma reference voltage and the outputted voltage resolution. | 05-28-2009 |
20090206929 | OPERATION AMPLIFIER FOR IMPROVING SLEW RATE - An OP amplifier including an input stage and an output stage for improving a slew rate is provided. The input stage receives one of input voltages, and generates an internal voltage according to the received input voltage. The output stage receives and gains the internal voltage, and outputs an output voltage. The output stage includes a first transistor, a plurality of first capacitors and a first switching unit. The first transistor includes a first source/drain terminal coupled to a first voltage, a gate terminal controlled by the internal voltage. The output stage outputs the output voltage according to a voltage at a second source/drain terminal of the first transistor. First terminals of the first capacitors are coupled to the second source/drain terminal of the first transistor. The first switching unit selectively transmits the internal voltage to the second terminal of a corresponding one of the first capacitors. | 08-20-2009 |
20090292946 | REPAIR MODULE FOR MEMORY, REPAIR DEVICE USING THE SAME AND METHOD THEREOF - A repair module for repairing one of n bit lines through m bit bus in a memory, a repair device using the same, and a method thereof are provided herein, wherein m≧n. In the repair method, a switching control signal and a selecting control signal are generated according to an index value of the one of n bit lines. A dummy line is switched to the one of n bit lines by shifting from 1 | 11-26-2009 |
20100103150 | DISPLAY SYSTEM - A display system includes a display device, a driving circuit, a flexible printed circuit (FPC), and a charge pump circuit. The driving circuit is disposed on the display device for driving the display device. The FPC is externally coupled to the display device. The charge pump circuit is disposed on the FPC for generating at least an output voltage to the driving circuit according to an input voltage. The charge pump circuit has at least one control line coupled to the driving circuit for receiving a control signal generated from the driving circuit, and the charge pump circuit sets a pumping factor according to the control signal. | 04-29-2010 |
20100118011 | DISPLAY SYSTEM - A display system includes a display device, a driving circuit, a flexible printed circuit (FPC), a charge pump circuit and a control circuit. The driving circuit is disposed on the display device, for driving the display device. The FPC is externally coupled to the display device. The charge pump circuit is disposed on the FPC, for generating at least an output voltage to the driving circuit. The control circuit is disposed on the display device and coupled to the driving circuit, for generating a plurality of control signals to control the charge pump circuit. The charge pump circuit has a plurality of control ports coupled to the control circuit for receiving the control signals generated from the control circuit, respectively. | 05-13-2010 |
20100163717 | CALIBRATION METHOD FOR CALIBRATING AMBIENT LIGHT SENSOR AND CALIBRATION APPARATUS THEREOF - A calibration method for calibrating an ambient light sensor (ALS) includes: testing the ALS by a plurality of test brightness inputs, and deriving a plurality of test ALS outputs respectively corresponding to the test brightness inputs; converting at least the test ALS outputs from an analog manner into a digital manner to generate a plurality of test ALS output values respectively; storing a test result including at least the test ALS output values; and calibrating a brightness value corresponding to a normal ALS output value according to information stored in the test result, thereby generating a calibrated brightness value. | 07-01-2010 |
20100164944 | DISPLAY SYSTEM - A display system includes a display device, a driving circuit, a flexible printed circuit (FPC), a charge pump circuit and a control circuit. The driving circuit is disposed on the display device, and utilized for driving the display device. The FPC is externally coupled to the display device. The charge pump circuit is disposed on the FPC, and utilized for generating at least an output voltage to the driving circuit. The control circuit is disposed on the display device and coupled to the driving circuit, and utilized for generating a control signal to control the charge pump circuit. The charge pump circuit has a control pin coupled to the control circuit for receiving the control signal generated from the control circuit. | 07-01-2010 |
20100171538 | BUFFER FOR DRIVING CIRCUIT AND METHOD THEREOF - A buffer for a driving circuit includes a first transistor, a second transistor and a slew rate controlling circuit. The first transistor serves to provide a current to an output terminal. The second transistor serves to sink a current from the output terminal. The slew rate controlling circuit serves to control slew rate of at least one of the first transistor and the second transistor according to the input signal. The managing circuit serves to prevent the first transistor and the second transistor from turning on simultaneously. | 07-08-2010 |
20100326744 | TOUCH PANEL - A touch panel has a panel capacitor, a first capacitor, and a second capacitor. The panel capacitor and the first capacitor are charged and discharged cyclically according to a first phase signal and a second phase signal, such that an input voltage associated with the panel capacitor and the first capacitor is applied to a control circuit. The control circuit charges and discharges a second capacitor based on the input voltage and a reference voltage to compensate the difference between the input voltage and the reference voltage. The capacitance of the panel capacitor could be calculated based on the frequency of charging and discharging the second capacitor. | 12-30-2010 |
20100328237 | TOUCH CONTROL SYSTEM FOR CONTROLLING TOUCH PANEL - A touch control system for controlling a touch panel includes a controller and a first sensing circuit. The controller generates and outputs a control signal. The first sensing circuit is coupled to the control device and to sensing lines of the touch panel, and the first sensing circuit receives the control signal from the controller, and generates at least one scan control signal according to the received control signal to determine a scan timing setting. | 12-30-2010 |
20100328252 | SWITCHED-CAPACITOR TRACKING APPARATUS OF TOUCH PANEL AND OPERATING METHOD THEREOF - A switched-capacitor tracking apparatus including a variable capacitor, an auxiliary capacitor, and a plurality of switches, and an operating method thereof are provided. In a charge period, a first reference voltage charges a panel capacitor, and a second reference voltage charges the variable capacitor. In a detection period, a control circuit detects a parallel connected voltage of the panel capacitor and the variable capacitor. The control circuit compares a third reference voltage and the parallel connected voltage. According to a comparison result, the control circuit dynamically determines whether to parallel connect the auxiliary capacitor to the variable capacitor. If all the comparison results accumulated in a statistics period are a first logic value, then the control circuit increases a capacitance of the variable capacitor. Moreover, if all the comparison results are a second logic value in the statistics period, then the control circuit decreases the capacitance of the variable capacitor. | 12-30-2010 |
20110018851 | LIQUID CRYSTAL DISPLAY AND CHARGE PUMP THEREOF - A charge pump with limited peak current and improved application flexibility and an LCD having the same. The charge pump has more than three switches in a charge path and more than three switches in a pump path. Furthermore, the charge pump has a voltage detector detecting voltage of the output terminal of the charge pump and a charge pump controller controlling the switches based on the detected voltage. According to the detected voltage, the charge pump controller determines the number of turning-on switches in the charge path and determines the number of turning-on switches in the pump path. | 01-27-2011 |
20110050189 | BOOSTER AND VOLTAGE DETECTION METHOD THEREOF - A booster and a voltage detection method thereof are provided herein. The booster includes a charge pump circuit and a voltage detection circuit. The charge pump circuit is controlled by a switching signal to generate an actual voltage according to the basis voltage, wherein the actual voltage is a product of the basis voltage multiplied by a first preset multiplier. The voltage detection circuit is coupled to the charge pump circuit. The voltage detection circuit selects one of a plurality of first multipliers to serve as the first preset multiplier according to a comparison result between the basis voltage and a target voltage, and generates the switching signal corresponding to the first preset multiplier. Therefore, the booster can properly select the first preset multiplier to generate the actual voltage as the basis voltage changes. | 03-03-2011 |
20110157072 | TOUCH PANEL - A touch panel including a plurality of panel capacitors, a first switching unit, a second switching unit, a first charging unit, a control unit and a counter is provided. Each of the panel capacitors is sequentially selected as an object capacitor. The first switching unit and the second switching unit switch the voltages received by the two terminals of the object capacitor. The control unit controls a first charging current provided by the first charging unit according to the variation in the terminal voltages of the object capacitor, and generates a comparison signal accordingly. The counter counts the comparison signal and the touch panel identifies the variation in the capacitance value of the object capacitor by using a count value generated by the counter. | 06-30-2011 |
20110242076 | DEVICE FOR DRIVING DATA AND METHOD THEREOF USED FOR LIQUID CRYSTAL DISPLAY - A device for driving data used for a liquid crystal display includes: a first latch circuit and a second latch circuit for forming first latched data and second latched data; a first regulating circuit and a second regulating circuit for regulating the first latched data or the second latched data; a first switch, a second switch, a third switch and a fourth switch respectively coupled between the first latch circuit or the second circuit and the first regulating circuit or the second regulating circuit. The first and the second latched data become a first pair of differential signals when the first switch and the fourth switch are turned on. The first and the second latched data become a second pair of differential signals which are opposite to the first pair of differential signals when the second switch and the third switch are turned on. | 10-06-2011 |
20110248950 | SCANNING METHOD OF A TOUCH PANEL - A scanning method of a touch panel is provided. The touch panel has a horizontal channel group including a plurality of horizontal channels and a vertical channel group including a plurality of vertical channels. According to the scanning method, N channels may be scanned simultaneously, wherein the N channels are selected from the horizontal channel group or the vertical channel group, the N channels are not adjacent to each other, N is a positive integer, and N is less than a channel amount of the selected channel group. Thereby, the scanning speed and the sensing accuracy of the touch panel using the scanning method are enhanced. | 10-13-2011 |
20110279424 | DISPLAY DEVICE AND DRIVING CIRCUIT THEREOF - A display device including a display panel and a driving circuit is provided, wherein the driving circuit includes a synchronizer and a driver. The synchronizer synchronizes a plurality of external control signals according to an internal clock and accordingly generates a plurality of internal control signals. The driver reads the internal control signals according to the internal clock and accordingly generates a plurality of driving signals to drive the display panel. | 11-17-2011 |
20110302338 | MICROCONTROLLER - A microcontroller is disclosed, which includes a memory, a first storage unit, a plurality of second storage units, a multiplexer and a micro-controller unit (MCU). The first storage unit is for being written into with a first code. The second storage units are for being written into with a plurality of second codes. The multiplexer writes the first code and one of the said second codes into the memory according to a control signal so that the memory generates a system code. The MCU reads out the system code come from the memory to perform operations. | 12-08-2011 |
20120062193 | VOLTAGE REGULATION CIRCUIT - A voltage regulation circuit including a differential input unit, a source follower and a driving unit is provided. The differential input unit has a first input terminal and a second input terminal for receiving a reference voltage and a system voltage respectively. Further, the differential input unit compares the reference voltage and the system voltage and accordingly generates a control voltage. The source follower is electrically connected between the differential input unit and the driving unit, and generates an adjustment voltage according to the control voltage. The differential input unit, the source follower and the driving unit form a feedback loop, so that the driving unit fixes a source voltage to the system voltage according to the adjustment voltage. | 03-15-2012 |
20120062247 | TEST SYSTEM AND METHOD - A test system for testing a capacitive touch sensor is provided. The test system includes a resistor, a signal generator and a micro controller. A first end of the resistor is electrically connected to a sensing port of the capacitive touch sensor. The signal generator provides a test voltage to a second end of the resistor according to control information. In this way, the resistor generates a test current according to the test voltage, and the capacitive touch sensor provides a voltage difference to the sensing port according to a plurality of switching signals, and converts the test current into test information. The micro controller generates the control information according to a test table, and compares the test information according to the test table, so as to determine whether an operation of the capacitive touch sensor is normal. | 03-15-2012 |
20120127120 | TOUCH DEVICE AND TOUCH POSITION LOCATING METHOD THEREOF - A touch device and a touch position locating method thereof are provided. The touch position locating method includes the following steps. A plurality of target blocks are selected from a plurality of sensing blocks of a touch panel. The target blocks are detected at the same time to obtain a plurality of touch sensing data. Reference data is obtained according to the touch sensing data. Subtraction operations between the reference data and the touch sensing data are performed respectively, so as to obtain a plurality of adjusted touch sensing data. A location of a touch point on the touch panel is calculated according to the adjusted touch sensing data. | 05-24-2012 |
20120139770 | CURRENT SENSING CIRCUIT - A current sensing circuit including a current sensing unit, a feedback control unit, and a digital output unit is provided. The current sensing unit senses a current and generates a pulse signal according to at least one reference signal and at least one feedback signal. The feedback control unit is coupled to the current sensing unit and generates the at least one feedback signal according to a clock signal and the pulse signal. The digital output unit is coupled to the current sensing unit and outputs a digital signal according to the pulse signal. The digital output unit counts an amount of pulses of the pulse signal in a predetermined time period to output the digital signal, wherein the amount of pulses is positively correlated with a value of the current. | 06-07-2012 |