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Image processing method for display device and display device

A display device and image processing technology, applied in static indicators, instruments, etc., can solve the problems of color drift of display panel pixels, change of color temperature of liquid crystal display panel, inability to maintain consistent color temperature and gamma curve, etc.

Active Publication Date: 2013-09-18
BENQ INTELLIGENT TECH SHANGHAICO LTD +1
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Problems solved by technology

[0004] Although the DC dimming method can solve the flickering problem of the AC dimming method, however, in the prior art, when the brightness of the backlight module is adjusted by using the DC dimming method, the color of the pixels of the liquid crystal display panel will drift, making the liquid crystal display The panel's color temperature and gamma curve change
Therefore, the conventional DC dimming method of the backlight module cannot maintain the same color temperature and gamma curve

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  • Image processing method for display device and display device
  • Image processing method for display device and display device
  • Image processing method for display device and display device

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[0018] Please also refer to figure 2 and image 3 . figure 2 It is a schematic diagram of a DC current waveform in a DC dimming mode. image 3 It is a schematic diagram of pixel color drift in DC dimming mode. Such as figure 2 As shown, the direct current dimming method is to control the magnitude of the direct current to adjust the brightness of the backlight module, and the magnitude of each direct current corresponds to a specific brightness. For example, when the brightness of the backlight module is to be adjusted to the brightest, the DC dimming method is to control the magnitude of the DC current to the maximum value Imax, and when the brightness of the backlight module is to be dimmed, the DC dimming method is to reduce The magnitude of the DC current to a smaller value, such as I1 or I2, etc. However, if image 3 As shown, when the DC dimming method reduces the magnitude of the DC current, the color of the pixel will drift, thereby causing the gamma value of ...

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Abstract

The invention provides an image processing method for a display device and the display device. The method comprises the following steps of providing direct current for a backlight module of the display device; regulating the magnitude of the direct current according to a brightness control signal to control the brightness of the backlight module; and when the brightness of the backlight module is changed, regulating the color temperature and a gamma curve of the display device to be the same as those of the display device when the backlight module has preset brightness, so that influence of a direct current dimming mode on the quality of a display picture is avoided.

Description

technical field [0001] The present invention relates to an image processing method of a display device and the display device thereof, in particular to an image processing method of the display device capable of maintaining consistent color temperature and gamma curve and the display device thereof. Background technique [0002] Since the liquid crystal display panel cannot emit light by itself, the liquid crystal display panel must be equipped with a backlight module as a light source. Generally speaking, there are two methods for adjusting the brightness of the backlight module, one is a DC dimming method, and the other is an AC dimming method. The DC dimming method is to adjust the magnitude of the DC current supplied to the backlight module, thereby adjusting the brightness of the backlight module. The AC dimming method is to adjust the pulse width of the AC power signal supplied to the backlight module, thereby adjusting the brightness of the backlight module. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 林信男
Owner BENQ INTELLIGENT TECH SHANGHAICO LTD
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