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Gamma reference voltage generator, gamma reference voltage generation method and liquid crystal display device

一种参考电压、产生器的技术，应用在仪器、静态指示器等方向，能够解决不能校正白点坐标、不利于提升面板显示性能、不能分别校正亚像素单元亮度等问题，达到提升色彩表现力、容易维护、节省成本的效果

Inactive Publication Date: 2017-01-04
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The brightness of sub-pixel units of three different colors of red, green and blue cannot be corrected separately;
[0005] 2) The white point coordinates of the gray scale cannot be corrected by adjusting the gamma reference voltage, which is not conducive to improving the display performance of the panel

Method used

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  • Gamma reference voltage generator, gamma reference voltage generation method and liquid crystal display device
  • Gamma reference voltage generator, gamma reference voltage generation method and liquid crystal display device
  • Gamma reference voltage generator, gamma reference voltage generation method and liquid crystal display device

Examples

Experimental program
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Embodiment 1

[0032] figure 2 A schematic diagram of the circuit structure of the gamma reference voltage generator provided by the embodiment of the present invention. Depend on figure 2 It can be seen that the device mainly includes a timing control module 110 , a digitally programmable gamma chip 120 and a multiplexing module 130 . In addition, in order to maintain the voltage of the analog signal at the input terminal of the source driving circuit, in this embodiment, the device preferably further includes a voltage maintaining circuit 140 . in:

[0033] The timing control module 110 is a timing control chip, mainly used to provide timing control signals. In addition, in this embodiment, the timing control chip preferably also has a built-in storage unit (not shown in the figure), such as a flash memory Flash, for storing data information representing multiple sets of gamma reference voltage values.

[0034] The programmable gamma chip 120 is a digital programmable gamma chip. Th...

Embodiment 2

[0039] Combine below image 3The working principle of the above-mentioned gamma reference voltage generator is further described. Here, the timing control module outputs two digital signals and controls the multi-channel gating module to output three sets of gamma reference voltages in time division, which are provided to the red, green and blue sub-pixel units as an example for illustration.

[0040] Such as image 3 As shown in a and 3b, the timing control module outputs two control signals EM0 and EM1 to the control terminal of the multiplexing module. in:

[0041] When both EM0 and EM1 are at low level, no channel of the multi-channel strobe module is turned on. Usually, this state will continue until the multi-channel gating module receives all the gamma reference voltages from the programmable gamma chip, for example, three groups of gamma reference voltages respectively used for red, green and blue sub-pixel units.

[0042] When EM0 is at low level and EM1 is at hig...

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Abstract

The present invention discloses a gamma reference voltage generator, a gamma reference voltage generation method and a corresponding liquid crystal display device. The gamma reference voltage generator comprises: a sequential control module; a programmable gamma chip electrically connected with the sequential control module and configured to generate corresponding groups of gamma reference voltage according to the data representing groups of gamma reference voltage values under the control of the sequential control module; and a multiplexing module electrically connected with the sequential control module and the programmable gamma chip and configured to selectively switch the corresponding channel according to the multiplexing control signals outputted by the sequential control module and output one group of gamma reference voltage from the groups of the gamma reference voltage received by the programmable gamma chip to supply the group of gamma reference voltage to a sub pixel unit corresponding to a display device. The individual control of the gamma reference voltage of the sub pixel unit of the liquid crystal display device can be realized so as to improve the display quality of the frame.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a gamma reference voltage generator and a method for generating a gamma reference voltage for a liquid crystal display, and a corresponding liquid crystal display device. Background technique [0002] With the development of display technology, Thin Film Transistor Liquid Crystal Display (TFT-LCD for short) has become an important display device in modern IT and video products. [0003] A plurality of pixel units are arranged on an array substrate of a liquid crystal display, and each pixel unit usually consists of at least three sub-pixel units of red (R), green (G), and blue (B) colors. Wherein, the brightness displayed by each sub-pixel unit is determined by a Gamma reference voltage. figure 1 A schematic diagram of a circuit for generating a gamma reference voltage and providing it to a display panel in an existing liquid crystal display is shown. From figure 1 It can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3696G09G2320/0673G09G3/2018G09G3/3607G09G2320/0276
Inventor 何健
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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