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Method and device for scanning backlight

A backlight and light bar technology, applied in the field of scanning backlight, can solve problems such as motion artifacts and insufficient contrast

Active Publication Date: 2013-10-16
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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)

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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Experimental program
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Embodiment Construction

[0023] In the embodiment of the present invention, light bars are arranged on the upper and lower sides of the backlight unit, and the backlight control unit controls the switching of the light bars on the upper and lower sides to realize backlight scanning.

[0024] The optical characteristic of the human eye is to first focus on areas with high brightness within the scope of observation, and this characteristic of the human eye is the technical application basis of the present invention.

[0025] When the upper light bar is turned on, in the display area of ​​the module, the upper side is the brightest, the middle is brighter, and the lower side is darker. According to the characteristics of the human eye, the area that the human eye focuses on is the brightest area, so the upper side of the module display area The side is the area that the human eye focuses on. When both the upper and lower light bars of the backlight unit are turned on, the middle area is the brightest, an...

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PUM

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Abstract

The invention discloses a method for scanning backlight, which is used for realizing backlight scanning by lamp strips at the upper side and the lower side and improving the display effect. The method comprises the following steps of: determining the time of smooth response of pixel liquid crystal according to pixel in a liquid crystal display screen; when the last line of pixel liquid crystal responses smoothly of the upper area in the liquid crystal display screen, turning on the lamp strips at the upper side; when the last line of pixel liquid crystal responses smoothly of the middle area in the liquid crystal display screen, turning on the lamp strips at the lower side; and when the last line of pixel liquid crystal responses smoothly of the lower area in the liquid crystal display screen, turning off the lamp strips at the upper side. 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 Patents(China)
IPC IPC(8): G09G3/36
Inventor 张丽蕾
Owner BOE TECH GRP CO LTD