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Method and device for scanning backlight

A technology of backlight and backlight source, applied in the field of scanning backlight, can solve the problems of affecting the display effect, insufficient contrast, motion artifacts, etc., and achieve the effect of shortening the closing time, reducing the contrast, and increasing the distance

Inactive Publication Date: 2012-08-22
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0002] There are also two major drawbacks of LCD monitors for TV applications: severe motion artifacts (occurring when watching sports scenes or action movies) and insufficient contrast (under dark field conditions)
The inventors of the present application found that the brightness of two adjacent light guide plates 903 is very high, and the brightness in the middle is slightly lower, and the contrast is strong. display effect

Method used

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  • Method and device for scanning backlight
  • Method and device for scanning backlight
  • Method and device for scanning backlight

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Embodiment Construction

[0022] In the embodiment of the present invention, a plurality of left and right side light groups with row intervals are turned on or off at the same time, that is to say, the left and right side light groups of two adjacent partitions (rows are adjacent) are not turned on or off at the same time, which increases the distance between bright areas. The light distribution is uniform through the light guide plate 903, thereby solving the problem that the contrast between the seam of the light guide plate 903 and the surrounding strongly affects the display effect. In addition, in the prior art, the left and right light groups are always turned on during the scanning process of one frame, so that the shadows at the seams of the light guide plate 903 stay longer and are easier to be caught by human eyes, which affects the display effect. However, in the embodiment of the present invention, in the process of scanning a frame, the left and right light groups are turned on or off at l...

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Abstract

The invention discloses a method for scanning backlight. The method is used for performing backlight scanning through lamp strips on the left side and the right side and improving the display effect. The method is used for controlling a backlight source unit of a liquid crystal display screen. The liquid crystal display screen comprises lamp groups on the left side and the right side. The time ofturning on and turning off the lamp groups on the left side and the right side is determined according to control signals of pixels in the liquid crystal display screen. In a scanning process, the lamp groups on the left side and the right side are turned on and turned off at intervals in different areas. In a process of scanning a first frame, the lamp groups on the left side and the right side are turned on or turned off for at least two times. The invention also discloses a device for realizing the method.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and a device for scanning a backlight of a liquid crystal display. Background technique [0002] LCDs also have two major drawbacks for TV applications: severe motion artifacts (occurring when watching sports or action movies) and insufficient contrast (in dark field conditions). The black screen insertion technique is a commonly used technique to shorten the response time. By inserting a black frame between each image frame, a fast pulse modulation effect similar to that of a CRT (Cathode Ray Tube, cathode ray tube) can be produced. Flashing LED (Light Emitting Diode) backlight can also play a similar effect to black screen insertion, the difference is that this technology uses regular extinguishing of the backlight to achieve the effect of black screen. In addition, backlight scanning technology that pulses the backlight can also achieve good results. The curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/342G09G3/3611G09G2310/0237G09G2310/024G09G2320/0261
Inventor 张丽蕾
Owner BOE TECH GRP CO LTD
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