Gamma voltage generating circuit and driving device

A technology of gamma voltage and generating circuit, which is applied to static indicators, instruments, etc., can solve the problem of dark display screen and achieve the effect of improving the overall brightness performance

Active Publication Date: 2018-10-23
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, since the RGBW LCD panel introduces W pixel units, the aperture ratio of the three sub-pixel units R, G, and B of the RGBW LCD panel is 75% of that of a conventional RGB LCD panel. When displaying a solid color picture, the overall brightness of the RGBW screen will be lower than RGB screen, the display screen is dark

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  • Gamma voltage generating circuit and driving device
  • Gamma voltage generating circuit and driving device
  • Gamma voltage generating circuit and driving device

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] Such as figure 1 As shown, the driving device 300 of the first embodiment of the present invention includes a display line buffer 240 , a level shifter 230 , a digital-to-analog converter 220 , a buffer amplifier 210 and a gamma voltage generation circuit 100 . The driving device 300 can receive an image input signal, perform a series of processing on it, and generate grayscale signals for driving the data lines of the liquid crystal panel. In this embodiment,...

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Abstract

The present invention provides a gamma voltage generation circuit, including an image detection module, a control module and a gamma voltage module; the image detection module is used to acquire an image input signal and detect the image input signal, When it is determined that the grayscale indicated by the image input signal includes a pure-color grayscale, generate and output a first detection result signal indicating the pure-color grayscale; the control module is electrically connected to the image detection module, Used to receive the first detection result signal output by the image detection module, generate and output a first control signal according to the first detection result signal; the gamma voltage module is electrically connected to the control module , configured to receive the first control signal output by the control module, and generate a first gamma reference voltage according to the first control signal. The present invention also provides a driving device with the gamma voltage generating circuit.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal panels, in particular to a gamma voltage generating circuit and a driving device having the gamma voltage generating circuit. Background technique [0002] RGBW LCD panel (LCD panel based on red, green, blue and white four-primary color display technology) adds a W (white) pixel unit in addition to the RGB three sub-pixel units of the original RGB LCD panel, so that the transmittance of the LCD panel is increased. Improvement, thereby reducing the power consumption of the backlight source, achieving power saving effects, and at the same time improving the contrast of the display screen. However, since the RGBW LCD panel introduces W pixel units, the aperture ratio of the three sub-pixel units R, G, and B of the RGBW LCD panel is 75% of that of a conventional RGB LCD panel. When displaying a solid color picture, the overall brightness of the RGBW screen will be lower than RGB screen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3607G09G3/3696G09G3/3688G09G2310/027G09G2320/0673G09G2360/16G09G2320/0276G09G2300/0452G09G3/36
Inventor 郭星灵陈伟谭小平
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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