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US 7,403,185 B2Granted
Liquid crystal display device and method of driving the same
AssigneeLG Display Co., Ltd.
InventorsHong Sung Song, Sung Woong Moon
Life of this patent
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Abstract
A liquid crystal display device includes a plurality of data integrated circuits. Each data integrated circuit includes a charge sharing circuit for electrically connecting all of the data lines together in response to a control signal and a voltage variation limiting circuit for generating the control signal.
Claims10
A liquid crystal display device, comprising:
- a data driving circuit having a plurality of data integrated circuits, wherein each of the data integrated circuits includes:
- a charge sharing circuit that electrically connects all of a plurality of data lines of the liquid crystal display device to each other in response to a control signal;
- and
- a voltage variation limiting circuit that generates the control signal in response to a received polarity signal,
- wherein the voltage variation limiting circuit includes:
- a delay circuit that delays the received polarity signal and outputs the received polarity signal as a delayed polarity signal;
- an XOR gate for performing an XOR operation on the received polarity signal and the delayed polarity signal;
- and
- an AND gate for performing an AND operation on the output of the XOR gate and a source output enable signal outputted from an external source to produce the control signal.
6 more elements
A method of driving a liquid crystal display device having a plurality of switching devices connected between a plurality of data lines to connect the data lines together, the method comprising:
- determining a pulse width of a high period of a received polarity signal outputted in accordance with a predetermined inversion driving method;
- generating a control signal for turning the plurality of switching devices on only when the polarity of the polarity signal is inverted;
- and
- turning the plurality of switching devices in response to the control signal to electrically connect all of the data lines together,
- wherein the step of generating the control signal includes:
- delaying the received polarity signal to produce a delayed polarity signal;
- performing an XOR operation on the received polarity signal and the delayed polarity signal;
- and
- performing an AND operation on the result of the XOR operation and a source output enable signal outputted from an external source.
6 more elements
Dependencies are inferred from the claim text.