Patent application number | Description | Published |
20090315819 | SOURCE DRIVER AND LIQUID CRYSTAL DISPLAY - A source driver and a liquid crystal display are provided. The source driver includes a plurality of pads, a first conducting wire, a second conducting wire, a plurality of first digital-to-analog converters (DACs), and a plurality of second DACs. The first conducting wire is coupled to a first voltage and the first DACs. The second conducting wire is coupled to a second voltage and the second DACs. The first DACs are disposed in a first layer. Output terminals of the first DACs are respectively coupled to a plurality of first pads included in the said pads. The second DACs are disposed in a second layer above the first layer. Output terminals of the second DACs are respectively coupled to a plurality of second pads included in the said pads. Thereby, the transmission quality of the conducting wires for transmitting signals is increased. | 12-24-2009 |
20100188323 | OUTPUT BUFFER AND SOURCE DRIVER USING THEREOF - An output buffer for providing an output voltage signal includes an operational amplifier, a controller and a power circuit. The operational amplifier provides the output voltage signal according to an input voltage signal. The controller judges whether a reference signal corresponding to the input voltage signal satisfies an energy-saving condition, and triggers an energy-saving operation event if yes, or triggers a normal operation event if not. The power circuit provides an energy-saving power signal to drive the operational amplifier in response to the energy-saving operation event and provides a normal power signal to drive the operational amplifier in response to the normal operation event, such that the operational amplifier provides the output voltage signal according to the input voltage signal. A voltage level of the normal power signal is higher than a voltage level of the energy-saving power signal. | 07-29-2010 |
20110032278 | SOURCE DRIVER - A source driver including a data register, a level shifter, a gamma correction unit, a digital-to-analog converter and a buffer is provided. The data register stores a digital data signal. The level shifter pulls up the level of the digital data signal. The gamma correction unit provides a gamma curve. The digital-to-analog converter transforms the level-pulled-up digital data signal into an analog data signal with reference to the gamma curve. The buffer outputs the analog data signal to drive a corresponding data line. The level shifter, the gamma correction unit, the digital-to-analog converter and the buffer are all figured to receive a first set of reference voltages or a second set of reference voltages. | 02-10-2011 |
Patent application number | Description | Published |
20090322667 | Data driver - A data driver includes two data processing circuits for respectively providing positive and negative pixel voltages according to first and second pixel data, and a multiplexer circuit including multiplexer units. Each multiplexer unit has first and second input terminals respectively receiving the positive and negative pixel voltages, and an output terminal coupled to a data line. A first switching device has first and second switches serially coupled between the first input and output terminals. A node between the first and second switches is selectively grounded via a third switch. A second switching device has fourth and fifth switches serially coupled between the second input and output terminals. A node between the fourth and fifth switches is selectively grounded via a sixth switch. When the first and second switches turn on, the sixth switch turns on. When the fourth and fifth switches turn on, the third switch turns on. | 12-31-2009 |
20100013749 | Electronic Device for Enhancing Voltage Driving Efficiency for a Source Driver and LCD Monitor Thereof - An electronic device for enhancing voltage driving efficiency for a source driver and a liquid crystal display (LCD) monitor is disclosed. The electronic device includes a reference voltage generator, a plurality of first coupling lines, a second coupling line wider than the first coupling lines, a data statistical unit and a reference voltage modulating module. The reference voltage generator generates a plurality of grayscale reference voltages. Each first coupling line and the second coupling line are utilized for transmitting one of the grayscale reference voltages. The data statistic unit statistically calculates a plurality of grayscale data values to generate a statistical result indicating a grayscale reference voltage corresponding to the most of the grayscale data values among the grayscale reference voltages. The reference voltage modulating module adjusts transmission relationship between the grayscale reference voltages and the first coupling lines and the second coupling line according to the statistic result. | 01-21-2010 |
20120062546 | DATA DRIVER - A data driver includes two data processing circuits for respectively providing positive and negative pixel voltages according to first and second pixel data, and a multiplexer circuit including multiplexer units. Each multiplexer unit has first and second input terminals respectively receiving the positive and negative pixel voltages, and an output terminal coupled to a data line. A first switching device has first and second switches serially coupled between the first input and output terminals. A node between the first and second switches is selectively grounded via a third switch. A second switching device has fourth and fifth switches serially coupled between the second input and output terminals. A node between the fourth and fifth switches is selectively grounded via a sixth switch. When the first and second switches turn on, the sixth switch turns on. When the fourth and fifth switches turn on, the third switch turns on. | 03-15-2012 |
20130120352 | DATA DRIVER - A data driver includes two data processing circuits for respectively providing positive and negative pixel voltages according to first and second pixel data, and a multiplexer circuit including multiplexer units. Each multiplexer unit has first and second input terminals respectively receiving the positive and negative pixel voltages, and an output terminal coupled to a data line. A first switching device has first and second switches serially coupled between the first input and output terminals. A node between the first and second switches is selectively grounded via a third switch. A second switching device has fourth and fifth switches serially coupled between the second input and output terminals. A node between the fourth and fifth switches is selectively grounded via a sixth switch. When the first and second switches turn on, the sixth switch turns on. When the fourth and fifth switches turn on, the third switch turns on. | 05-16-2013 |
20140160105 | SOURCE DRIVER - A source driver for driving a data line is provided. The source driver includes an output pin, a buffer amplifier, a first switch, a recycle capacitor, a second switch, a power supply circuit and a third switch. The output pin is coupled to the data line. The first switch electrically connects the buffer amplifier to the output pin in a charge period. The second switch is coupled to the recycle capacitor, and electrically connects the recycle capacitor to the output pin in a recollection period. The recollection period is after the charge period. The third switch electrically connects the recycle capacitor to the power supply circuit in a reuse period. The reuse period is after the recollection period. | 06-12-2014 |
20140184581 | DATA DRIVER - A data driver includes two data processing circuits for respectively providing positive and negative pixel voltages according to first and second pixel data, and a multiplexer circuit including multiplexer units. Each multiplexer unit has first and second input terminals respectively receiving the positive and negative pixel voltages, and an output terminal coupled to a data line. A first switching device has first and second switches serially coupled between the first input and output terminals. A node between the first and second switches is selectively grounded via a third switch. A second switching device has fourth and fifth switches serially coupled between the second input and output terminals. A node between the fourth and fifth switches is selectively grounded via a sixth switch. When the first and second switches turn on, the sixth switch turns on. When the fourth and fifth switches turn on, the third switch turns on. | 07-03-2014 |