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Backlight control method and backlight system

A technology of backlight control and backlight system, applied in cathode ray tube indicators, static indicators, instruments, etc., can solve problems such as uneven brightness, insufficient frequency, and screen flicker in the scanning area

Inactive Publication Date: 2013-10-30
WISTRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing scanning-based backlight control methods often result in insufficient frequency or uneven brightness in the scanning area due to improper design, which in turn causes screen flickering.

Method used

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  • Backlight control method and backlight system
  • Backlight control method and backlight system
  • Backlight control method and backlight system

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Please refer to figure 2 , figure 2 It is a schematic diagram of an embodiment of the backlight system 20 of the present invention. The backlight system 20 is used to provide a backlight for a display panel. Preferably, the display panel can be a liquid crystal display panel, but not limited thereto. The backlight system 20 includes a backlight driving device 202 and a backlight module 204 . The backlight driving device 202 includes a processing unit 206 and a backlight control unit 208 . The processing unit 206 is used to divide the backlight module 204 into multiple backlight areas. For example, if figure 2 As shown, the backlight module 204 is divided into backlight areas B1˜Bn. Each backlight area includes at least one light source. Preferably, the at least one light emitting source can be realized by a light emitting diode (Light Emitting Diode, LED). Please refer to image 3 , image 3 It is a schematic diagram of an embodiment of the backlight module...

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PUM

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Abstract

A backlight control method for a backlight module corresponding to a display panel is disclosed, which includes the steps of dividing the backlight module into a plurality of backlight areas, calculating a first blanking period, a active pixel period and a second blanking period of an image frame, sequentially turning on light sources of the plurality of backlight areas to provide backlights for the display panel during the active pixel period, wherein light sources of each backlight area is turned on and lasted to a light-on duration, the active pixel period begins at a time point of displaying the first active pixel of the image frame and ends at a time point of displaying the last active pixel of the image frame.

Description

technical field [0001] The invention relates to a backlight control method and a related backlight system, in particular to a backlight control method and a related backlight system capable of reducing power consumption and improving screen flicker. Background technique [0002] Compared with traditionally used light sources, Light Emitting Diodes (LEDs) have the advantages of power saving, long component life, no mercury, rich color gamut, no warm-up time, and fast response. It is widely used as a light source for display and lighting. For example, a backlight module of a conventional liquid crystal display panel uses a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL) as a light source. Nowadays, as the luminous efficiency of light-emitting diodes continues to increase and the cost decreases, light-emitting diodes tend to gradually replace CCFLs as light sources for backlight modules. [0003] Please refer to figure 1 , figure 1 It is a schematic diag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
CPCG09G5/10G09G3/342G09G2310/0237G09G2310/024G09G2310/08G09G2320/0247G09G2330/021
Inventor 李沧兴蔡珮琪
Owner WISTRON CORP