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US 2015/0310812 A1Published application
Source driver
AssigneeSamsung Electronics Co., Ltd.
InventorsJia-wei CHEN, Yu-wen CHIOU, Yang-wook KIM
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Abstract
A source driver includes an output unit and a pre-charge unit. The output unit includes a first output amplifier to output a first output voltage and a second output amplifier to output a second output voltage. A polarity of the second output voltage is opposite to a polarity of the first output voltage. The pre-charge unit pre-charges an input of the first output amplifier and an input of the second output amplifier during a first period, upon a polarity change of the output unit.
Claims20
A source driver, comprising:
- an output circuit including a first output amplifier to output a first output voltage and a second output amplifier to output a second output voltage, a polarity of the second output voltage being opposite to a polarity of the first output voltage;
- a pre-charge circuit to pre-charge an input of the first output amplifier and an input of the second output amplifier during a first period, upon a polarity change of the output circuit;
- a digital-to-analog conversion (DAC) including a first converter and a second converter, the first converter being to receive first input data and output a first voltage, and the second converter to receive second input data and output a second voltage;
- and
- a multiplexer to selectively provide the first output amplifier and the second output amplifier with the first voltage and the second voltage.
2 more elements
A source driver, comprising:
- a gamma voltage generation circuit including a first resistor string and a second resistor string, the gamma voltage generation circuit to generate a plurality of first gamma voltages and a plurality of second gamma voltages, a polarity of the plurality of second gamma voltages being different from a polarity of the plurality of first gamma voltages;
- a digital-to-analog conversion circuit to select gamma voltages among the plurality of first gamma voltages and the plurality of second gamma voltages, based on input data and a polarity signal;
- an output circuit including a plurality of output amplifiers to receive the selected gamma voltages and to buffer the received gamma voltages, the plurality of output amplifiers output the buffered gamma voltages to source lines of a display panel, the output circuit to output voltages of different polarities;
- and
- a pre-charge circuit to pre-charge inputs of the plurality of output amplifiers upon a polarity change of the output circuit.
2 more elements
A portable electronic device, comprising:
- a processor;
- a memory;
- and
- a display device including a display panel and a driver circuit, the display panel to display an image, the driver circuit including:
- a timing controller to receive image data and to convert the image data into pixel data;
- a voltage generator to generate voltages that are used in the driver circuit and the display panel;
- and
- a source driver which includes:
- an output circuit including a first output amplifier to output a first output voltage and a second output amplifier to output a second output voltage, a polarity of the second output voltage being opposite to a polarity of the first output voltage;
- a pre-charge circuit to pre-charge an input of the first output amplifier and an input of the second output amplifier during a first period, upon a polarity change of the output circuit.
7 more elements
Dependencies are inferred from the claim text.