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Gamma voltage generation device, method and liquid crystal display

A liquid crystal display, gamma voltage technology, applied in static indicators, instruments, etc., can solve the problems of reducing work efficiency, complicated wiring, and tedious determination of resistance, and achieve the effects of improving work efficiency, low cost, and simple wiring.

Active Publication Date: 2015-12-02
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main disadvantage of the prior art is that the determination of the resistance in the gamma voltage generating device is very cumbersome, and different liquid crystal display panels and different liquid crystal material characteristics need to be adjusted with different resistances, so a large amount of calculation and debugging work is required, greatly Reduced work efficiency
In addition, there are many components such as resistors and capacitors, resulting in high cost and complicated circuits of liquid crystal displays, which is not conducive to the miniaturization and integration of liquid crystal displays.

Method used

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  • Gamma voltage generation device, method and liquid crystal display
  • Gamma voltage generation device, method and liquid crystal display
  • Gamma voltage generation device, method and liquid crystal display

Examples

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no. 1 example

[0027] figure 2 It is a main structural block diagram of the gamma voltage generating device provided by the first embodiment of the present invention. Please refer to figure 2 , the gamma voltage generating device includes: an arithmetic unit 23 , and a signal conversion unit 25 connected to the arithmetic unit 23 and the source driver 27 .

[0028] The arithmetic unit 23 is used to obtain the corresponding relationship between the gray scale and the gamma voltage according to the pre-input gamma curve and gamma curvature, and through the pre-stored calculation formula of the gray scale and the transmittance of the liquid crystal display. The corresponding relationship between the gamma voltage and the pre-stored gray scale value required by the liquid crystal display is used to obtain the digital signal of the gamma voltage, wherein the gamma curve is a relationship curve between the gamma voltage and the transmittance of the liquid crystal display.

[0029] Among them, ...

no. 2 example

[0036] Please refer to image 3 , which shows a main structural block diagram of the gamma voltage generating device provided by the second embodiment of the present invention. image 3 is in figure 2 improved on the basis of its with figure 2 The devices shown are similar, the difference being that the gamma voltage generating device further includes: an input unit 301 connected to the arithmetic unit 23 .

[0037] The input unit 301 is used to pre-input the obtained gamma curve and gamma curvature to the computing unit 23, wherein the gamma curve is a relationship curve between the gamma voltage and the transmittance of the liquid crystal display.

[0038] Wherein, the gamma curvature is the electro-optic response parameter of the liquid crystal display, and the gamma curvature can be set to 2.2, so that the best comfort suitable for human eye observation can be obtained. In other embodiments, as long as the most suitable human eye observation can be obtained For optim...

no. 3 example

[0044] Figure 4 It is a flowchart of the steps of the gamma voltage generation method provided by the third embodiment of the present invention. Please refer to Figure 4 , the method for generating a gamma voltage in this embodiment includes the following steps 401-403.

[0045] Step 401, the arithmetic unit obtains the corresponding relationship between the gray scale and the gamma voltage according to the pre-input gamma curve and gamma curvature, and through the pre-stored calculation formula of the gray scale and the transmittance of the liquid crystal display, and according to the gray scale and the gamma voltage The corresponding relationship between the gamma voltage and the pre-stored gray scale value required by the liquid crystal display is used to obtain the digital signal of the gamma voltage, wherein the gamma curve is the relationship curve between the gamma voltage and the transmittance of the liquid crystal display.

[0046] Among them, the calculation form...

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Abstract

The invention discloses a gamma voltage generation device, a method and a liquid crystal display, which belongs to the technical field of display. The device comprises an arithmetic unit and a signal conversion unit connected with the arithmetic unit and a source driver, wherein the arithmetic unit is used for acquiring a corresponding relation between a gray scale and gamma voltage according to a gamma curve and a gamma curvature inputted in advance, and a pre-stored computational formula for the gray scale and liquid crystal display transmittance, and according to the corresponding relation between the gray scale and the gamma voltage and the pre-stored gray scale value needed by the liquid crystal display, a digital signal for the gamma voltage is obtained, and the gamma curve is a relation curve between the gamma voltage and the liquid crystal display transmittance; and the signal conversion unit is used for converting the gamma voltage digital signal to a gamma voltage analog signal and providing the gamma voltage analog signal to the source driver. The circuit is simple, the cost is low, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a gamma voltage generating device and method, and a liquid crystal display. Background technique [0002] Liquid crystal displays have the characteristics of low power consumption, high image quality, small size, and light weight, so they are favored by everyone and become the mainstream of displays. At present, liquid crystal displays are mainly thin-film transistor (TFT) liquid crystal displays, and the liquid crystal display panel is the main component of the liquid crystal display. and the liquid crystal layer between the TFT array substrate. [0003] The driving of the liquid crystal display panel is that the gamma voltage generating device outputs the gamma voltage to the source driver, the source driver provides the data signal to the liquid crystal display unit according to the gamma voltage, and the gate driver provides the scanning signal to the liquid crystal display...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 李张军胡旭旭
Owner KUSN INFOVISION OPTOELECTRONICS
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