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Liquid crystal driving device

A liquid crystal driving and liquid crystal pixel technology, which is applied to instruments, static indicators, etc., can solve the problems of limited freedom of module design, rising costs, and increasing the number of parts, and achieves the effect of simplifying the adjustment operation.

Inactive Publication Date: 2004-06-16
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, since external voltage compensation parts (external voltage compensation parts) such as variable resistors 2708 and 2709 are required for each source driver IC, the number of parts increases and the cost increases
[0041] In addition, since a mechanism for adjustment is required after installation, the degree of freedom in module design is limited
[0042] In addition, since it is necessary to adjust the offset voltage of the external voltage compensation part for each shipped product, the work is complicated.

Method used

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Embodiment Construction

[0061] If according to figure 1 and figure 2 One mode of implementation of the present invention will be described as follows.

[0062] exist figure 2 A configuration example of the source driver of the liquid crystal driving device according to the present invention is shown in . Additionally, for Figure 5 and Figure 6 Members having the same functions are assigned the same reference numerals, and detailed descriptions thereof are omitted.

[0063] figure 2 The illustrated source driver IC 3802-1 differs from that in that a selector circuit 1000 is provided at a stage preceding an input latch circuit 4401, and that a voltage generating circuit 1001 different from the voltage generating circuit 4402 is provided. Figure 6 The source driver IC3802-1 shown is different.

[0064] Display data supplied from outside passes through the control circuit 3804 (refer to Figure 5 ) is converted into a digital signal (a signal divided into R, G, and B, hereinafter referred to...

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Abstract

A liquid crystal driving device in accordance with the present invention includes an offset information storing register for storing digital compensation data, an amplitude information storing register, and a variable resistor for adjusting the maximum gradation display voltage and minimum gradation display voltage in order to cause an absolute value of the difference between a voltage applied to a pixel electrode and a voltage applied to a common electrode to be consistent in all frames. With this, the number of components of the liquid crystal driving device can be restrained and the offset adjustment can be easily carried out with low costs.

Description

technical field [0001] The present invention relates to a liquid crystal driving device for compensating liquid crystal driving voltage. Background technique [0002] Figure 5 A block configuration of a conventional example of a TFT liquid crystal display device (display device using a TFT liquid crystal panel) which is a representative example of the active matrix system is shown. 3801 represents a TFT liquid crystal panel (including a common electrode (counter electrode)), and 3802 represents a source composed of a plurality of source driver ICs 3802-1, 3802-2, ..., and 3802-n (n: a natural number). Driver, 3803 denotes a gate driver composed of a plurality of gate driver ICs 3802-1, 3802-2, ..., and 3802-m (m: natural number), and 3804 denotes a control circuit (in Figure 5 In, it is described as a controller), and 3805 represents a liquid crystal drive power supply (power supply circuit) that generates various voltages for driving a liquid crystal panel. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/20G09G3/36
CPCG09G2310/027G09G2320/02G09G3/2011G09G3/3696G09G2320/0693G09G3/3688G09G3/3614G09G3/36
Inventor 物申正彦
Owner SHARP KK