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Liquid crystal display device

A liquid crystal display device and liquid crystal driving technology, applied in static indicators, instruments, etc., can solve the problems of reduced power consumption, longer screen update cycle, liquid crystal degradation, etc., and achieve the effect of preventing flickering

Inactive Publication Date: 2011-08-10
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the liquid crystal driving frequency is reduced, the update cycle of the screen will be longer and the power consumption will be greatly reduced
[0004] On the other hand, liquid crystals have the property of rapidly deteriorating when a DC voltage is applied to them

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0095] figure 1 It is a block diagram showing the configuration of a liquid crystal display device according to an embodiment of the present invention. figure 1 The illustrated liquid crystal display device 1 includes: a pixel array 10 , a display control circuit 20 , a gate line driver circuit 30 , a source line driver circuit 40 , and a gate voltage generation circuit 50 . Hereinafter, m and n are integers of 1 or more, at least one of m and n is an integer of 2 or more, and j is an integer of 1 or more and m or less.

[0096] The pixel array 10 includes m gate lines G1 to Gm, n source lines S1 to Sn, and (m×n) pixel circuits 11 . The gate lines are also referred to as scan signal lines, and the source lines are also referred to as data signal lines. The gate lines G1 to Gm are arranged parallel to each other, and the source lines S1 to Sn are perpendicular to the gate lines G1 to Gm and arranged in parallel to each other. The pixel circuits 11 are provided correspondin...

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PUM

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Abstract

In a liquid crystal display device which performs alternate-current driving, at least one of a gate voltage swing Vgp-p(p) when a positive polarity voltage is applied and a gate voltage swing Vgp-p(n) when a negative polarity voltage is applied is changed depending on a liquid crystal driving frequency. In consequence, the effective values of liquid crystal applied voltages of positive polarity and negative polarity are equalized regardless of the liquid crystal driving frequency, and flicker caused when the liquid crystal driving frequency is switched is prevented. By lowering the gate low voltage Vgln after the negative polarity voltage is applied as the liquid crystal driving frequency becomes lower, the leak current of a TFT with negative polarity is reduced, and the voltage retentionof a liquid crystal element is improved.

Description

technical field [0001] The present invention relates to a liquid crystal display device, in particular to a liquid crystal display device with the function of switching the driving frequency of the liquid crystal. Background technique [0002] Liquid crystal display devices are used in various electronic devices such as television receivers and personal computers. Generally, liquid crystal display devices have low power consumption, which is good, but liquid crystal display devices used for portable electronic devices such as portable phones or portable computers are required to have lower power consumption. [0003] As one of methods for reducing power consumption of a liquid crystal display device, a method of switching a liquid crystal driving frequency is known. For example, when a liquid crystal display device is used in a portable computer, the liquid crystal drive frequency may be lower than the normal liquid crystal drive frequency when the user does not perform an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G09G3/20G09G3/36
CPCG09G2320/0247G09G3/3677G09G2320/0204G09G2330/021G09G2340/0435G09G3/3696
Inventor 松田典子村井淳人植畑正树栗原直
Owner SHARP KK