Liquid crystal display device for reducing power consumption and method of driving the same
AssigneeLG Display Co., Ltd.
InventorsHak-Su Kim, Mi-Kyung Kim
Life of this patent
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Abstract
A liquid crystal display wherein power consumption of a gate drive circuit is reduced and a method of driving the same are disclosed. The liquid crystal display includes a liquid crystal panel having pixel regions defined by intersection of a plurality of gate lines and a plurality of data lines, a timing controller to output a clock pulse selectively having a first voltage level, second voltage level and third voltage level of different voltage levels and a data control signal, a gate drive unit to drive the gate lines in response to the clock pulse, and a data drive unit to drive the data lines in response to the data control signal.
Claims14
A liquid crystal display, comprising:
- a liquid crystal panel comprising a plurality of pixel regions defined by intersections of a plurality of gate lines and a plurality of data lines;
- a timing controller configured to output a data control signal and a plurality of clock pulses, each of the plurality of clock pulses comprising at least three voltage levels;
- a gate drive unit configured to drive the gate lines in response to the clock pulses;
- and
- a data drive unit configured to drive the data lines in response to the data control signal,
- wherein:
- the at least three voltage levels comprise first, second, and third voltage levels,
- the first voltage level comprises a higher level than the third voltage level,
- the second voltage level comprises a level between the first and third voltage levels,
- the first and second voltage levels are applied during an enable period, and
- the third voltage level is applied during the entirety of a disable period, the disable period immediately preceding the enable period,
- wherein the enable period is divided into:
- a first period during the entirety of which the second voltage level is maintained, and
- a second period during the entirety of which the first voltage level is maintained,
- wherein the first period is longer than the second period:
- wherein output of the third voltage level is immediately succeeded by output of the second voltage level, and
- wherein output of the second voltage level is immediately succeeded by output of the first voltage level.
A method of driving a liquid crystal display, the method comprising:
- outputting a plurality of clock pulses, each comprising at least three voltage levels;
- and
- driving a plurality of gate lines in response to the clock pulses,
- wherein:
- the at least three voltage levels comprise first, second, and third voltage levels,
- the first voltage level comprises a higher level than the third voltage level,
- the second voltage level comprises a level between the first and third voltage levels,
- the first and second voltage levels are applied during an enable period, and
- the third voltage level is applied during the entirety of a disable period, the disable period immediately preceding the enable period, and
- wherein the enable period is divided into:
- a first period during the entirety of which the second voltage level is maintained, and
- a second period during the entirety of which the first voltage level is maintained,
- wherein the first period is longer than the second period,
- wherein output of the third voltage level is immediately succeeded by output of the second voltage level, and
- wherein output of the second voltage level is immediately succeeded by output of the first voltage level.
Dependencies are inferred from the claim text.