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Gamma reference voltage generation device and displayer

A reference voltage and generating device technology, applied in static indicators, instruments, etc., can solve the problem that liquid crystal electric field force and temperature change are not linear, response time and temperature change are not linear, and TFT-LCD temperature compensation cannot be well realized and other issues to avoid bad display effect

Active Publication Date: 2014-05-14
BEIJING BOE OPTOELECTRONCIS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, TFT-LCD temperature compensation is mostly realized by thermistor or resistance temperature sensor. This method is realized by using the linear relationship between resistance value and temperature change. However, in general, the response time of liquid crystal molecules is not related to temperature change. Not a linear relationship, that is, when displaying the same gray scale, the electric field force required by the liquid crystal and the temperature change are not linear
Therefore, the temperature compensation of TFT-LCD cannot be well realized by using thermistor or resistance temperature sensor.

Method used

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  • Gamma reference voltage generation device and displayer

Examples

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Embodiment 1

[0033] Such as Figure 3-6 As shown, this embodiment provides a gamma reference voltage generation device, including a gamma reference voltage source and a gamma reference voltage conversion module, the gamma reference voltage source is connected to the gamma reference voltage conversion module for N gamma reference voltages are provided, and the gamma reference voltage generation device in this embodiment also includes at least one temperature compensation circuit, which is connected to the gamma reference voltage conversion module for compensating The gamma reference voltage output by the gamma reference voltage source through the gamma reference voltage conversion module.

[0034] Wherein, the gamma reference voltage conversion module includes N gamma reference voltage signal ports, the gamma reference voltage signal port is corresponding to N gamma reference voltages, and the gamma reference voltage source is used for gamma reference voltage conversion The module inputs a...

Embodiment 2

[0050] This embodiment provides a display, which includes the gamma reference voltage generation device described in Embodiment 1 and the gray-scale voltage generation device connected thereto, the gray-scale voltage generation device is used to The voltage generates a plurality of gray scale voltages with which the display displays gray scales.

[0051] It should be noted that the gamma reference voltages in this implementation correspond to a gamma reference voltage signal port in the gamma reference voltage generation device.

[0052] Certainly, the gray-scale voltage generating device further includes a gray-scale voltage generating module, the gray-scale voltage generating module is connected to the gamma voltage signal port, and is used to generate a plurality of gray-scale voltages according to the gamma voltage output from the gamma voltage signal port. step voltage.

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Abstract

The invention provides a gamma reference voltage generation device and a displayer, and belongs to the technical field of liquid crystal displaying. The problem that an existing displayer is poor in display due to temperature variations is solved. The gamma reference voltage generation device comprises a gamma reference voltage source and a gamma reference voltage switching module, and the gamma reference voltage source is connected with the gamma reference voltage switching module to be used for providing the gamma reference voltage. The gamma reference voltage generation device further comprises at least one temperature compensation circuit, and the temperature compensation circuit is connected with the gamma reference voltage switching module to be used for compensating the gamma reference voltage, output by the gamma reference voltage switching module, of the gamma reference voltage source according to temperature changes. The displayer comprises the gamma reference voltage generation device.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a gamma reference voltage generating device and a display. Background technique [0002] Currently, the driving voltage displayed by a Thin Film Transistor-Liquid Crystal Display (TFT-LCD for short) is a fixed value, generally AVDD. The Source Driver IC operates the driving voltage (AVDD), common voltage (VCOM), and gamma voltage to finally form gray-scale voltages for TFT-LCD to realize different gray-scale displays. Such as figure 1 , 2 As shown, the gamma reference voltage source supplies power to the gamma reference voltage conversion module, and is converted into different gamma reference voltages (V GMA_1 ~V GMA_N ), the gamma reference voltage is output to the gray-scale voltage generation module through the gamma voltage signal port, and the gray-scale voltage (Vg1-Vgn) is finally generated. Taking the 8bit source driver chip as an example,...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3696G09G2320/041G09G2320/0673G09G2330/12G09G3/2011G09G3/3648G09G2320/0252
Inventor 陈会娟金亨奎王谦
Owner BEIJING BOE OPTOELECTRONCIS TECH CO LTD