Dynamic backlight liquid crystal display system and method

A technology of liquid crystal display and dynamic backlight, which is applied to static indicators, cathode ray tube indicators, instruments, etc., and can solve the problems of black images not being black, low image contrast and color saturation, low dynamic contrast and color saturation, etc. , to achieve the effect of maintaining image details, suppressing flicker between frames, and reducing power consumption

Active Publication Date: 2012-10-03
上海易维视科技有限公司
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AI Technical Summary

Problems solved by technology

[0004] Second, the dynamic contrast and color saturation are low
Reduce the contrast and color saturation of the displayed image, due to the light leakage characteristics of the LCD panel, if the backlight unit always emits light at the maximum brightness, it will cause a black image that is not black, resulting in lower image contrast and color saturation

Method used

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  • Dynamic backlight liquid crystal display system and method
  • Dynamic backlight liquid crystal display system and method
  • Dynamic backlight liquid crystal display system and method

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Embodiment 1

[0055] see figure 2, The present invention discloses a dynamic backlight liquid crystal display system, the system includes a pixel brightness calculation unit, a brightness histogram statistics unit, a brightness representative value calculation unit, a time domain filter unit, a video signal compensation unit, and a nonlinear processing unit. The pixel brightness calculation unit, the brightness histogram statistics unit, the brightness representative value calculation unit, and the time-domain filter unit are connected in sequence, and the time-domain filter unit is respectively connected with the video signal compensation unit and the nonlinear processing unit. Each component of the present invention is introduced respectively below.

[0056] [Pixel brightness calculation unit]

[0057] The pixel brightness calculation unit is used to calculate the pixel brightness of the input video signal image. In this embodiment, the pixel brightness calculation unit takes the maxim...

Embodiment 2

[0105] see image 3 , Figure 4 , the characteristics of this embodiment require external memory.

[0106] When the input image activity data start signal is detected, the brightness calculation unit calculates the pixel brightness, and the pixel brightness value is input to the brightness histogram statistics unit, and the histogram is counted until the image activity data end signal is detected. While performing the above calculations, the input video signal image is stored in the external memory.

[0107] After detecting the end signal of the input image activity data, the brightness representative value calculation unit calculates the brightness representative value of the input image, and inputs the result to the time domain filter unit for filtering, updates the backlight brightness control value with the filtering result, and then controls the backlight brightness The value is processed nonlinearly, and the brightness of the backlight is controlled by the processing r...

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Abstract

The invention discloses dynamic backlight liquid crystal display system and method. The system comprises a pixel brightness computing unit, a brightness histogram counting unit, a brightness representative value computing unit, a time domain filtering unit, a video signal compensating unit and a nonlinear processing unit, wherein the pixel brightness computing unit, the brightness histogram counting unit, the brightness representative value computing unit and the time domain filtering unit are sequentially connected; and the time domain filtering unit is respectively connected with the video signal compensating unit and the nonlinear processing unit. The invention can effectively reduce the energy consumption of a liquid crystal display device, improve dynamic contrast and color saturation of displayed images, effectively improve image quality problems brought by dynamic backlight liquid crystal display, restrain flicker among frames, and keep image details.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and relates to a liquid crystal display system, in particular to a dynamic backlight liquid crystal display system; meanwhile, the invention also relates to a display method of the dynamic backlight liquid crystal display system. Background technique [0002] A liquid crystal display device (LCD) generally consists of a liquid crystal panel and a backlight unit. Normally, the backlight unit emits constant and uniform light to the liquid crystal panel, and then adjusts the light transmittance of the pixel units of the liquid crystal panel to display images. In this display mode, the luminous brightness of the backlight unit has nothing to do with the content of the displayed image. Whether it is a dark image or a bright image, the backlight unit always emits light at the maximum brightness, which leads to problems with the liquid crystal display: [0003] First, the power consumpti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G5/10
Inventor 王兆仲
Owner 上海易维视科技有限公司
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