Liquid crystal display
AssigneeSamsung Display Co., Ltd.
InventorJunghwan Kim
Life of this patent
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Abstract
A liquid crystal display having reduced power consumption. The liquid crystal display includes a liquid crystal display panel having a plurality of pixels and a plurality of pixel memories. A pixel voltage is stored in a pixel memory in an on screen display (OSD) region of the liquid crystal display panel for displaying a still image for a long period of time and driving a liquid crystal cell by the stored pixel voltage. Also, the power consumption of the liquid crystal display can be reduced by using a NAND gate or a NOR gate as a circuit element for alternating a voltage between low level and high level so as to store a pixel voltage in a pixel memory of the liquid crystal display.
Claims7
A liquid crystal display comprising a data driver, a gate driver and a liquid crystal display panel having a plurality of pixels and a plurality of pixel memories, each of the plurality of pixel memories comprising:
- a first NOR gate having a first input terminal electrically coupled to a ground and configured to output an inverted voltage of a voltage applied to its second input terminal;
- a second NOR gate having a first input terminal electrically coupled to the ground, configured to receive at its second input terminal a voltage outputted from the first NOR gate, and configured to output to its output terminal an inverted voltage of the voltage outputted from the first NOR gate;
- a memory switching element having a first electrode electrically coupled to the second input terminal of the first NOR gate, and a second electrode electrically coupled to the output terminal of the second NOR gate;
- a first switching element electrically coupled between the memory switching element and a pixel electrode;
- and
- a second switching element electrically coupled between the pixel electrode and an output terminal of the first NOR gate.
Dependencies are inferred from the claim text.