Sidelight-type LED backlight dynamic partitioning control method

A technology of dynamic partition and control method, applied in static indicators, instruments, etc., can solve problems such as difficulty in dynamic dimming of edge-lit LED backlights

Inactive Publication Date: 2011-03-09
GUANGZHOU SKYWORTH PLANE DISPLAY TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problem of difficult dynamic dimming of side-light LED backlights in t

Method used

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  • Sidelight-type LED backlight dynamic partitioning control method
  • Sidelight-type LED backlight dynamic partitioning control method
  • Sidelight-type LED backlight dynamic partitioning control method

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Embodiment Construction

[0018] See figure 1 . In the present invention, the side-light LED is divided into several LED sub-block areas and controlled by a two-dimensional control method to achieve the effect of area dimming. The LEDs are arranged on four sides of the light guide plate, and its working principle is as follows:

[0019] A. Divide the backlight area into N*M (N ≥ 2, N ≥ 2) rectangular control areas, and divide the LEDs on the four sides into N sub-blocks and M sub-blocks according to the division of the rectangular control areas;

[0020] B. Establish the brightness of each control area and the equation of the brightness provided by the LED sub-block corresponding to the control area, and use the same equations for each LED sub-block as an equation group;

[0021] C. Substitute the actual brightness value of each control area into the equation group;

[0022] D. According to the number of brightness provided by each LED sub-block for its corresponding control area, take the average v...

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Abstract

The invention discloses a sidelight-type LED backlight dynamic partitioning control method. The LEDs are arranged on four side faces of a light guide plate. The method comprises the following steps: partitioning the backlight region into rectangular control regions, and respectively partitioning LEDs on the four side faces according to the partitioning of the rectangular control regions; establishing an equation of the brightness of each control region and the brightness which is provided for the control region by the LED subblock of the corresponding control region, and considering the equations with the same LED subblock as a system of equations; substituting the actual brightness of each control region in the system of equations; according to the number of brightnesses provided for the corresponding control regions by the LED subblocks, calculating the average value of the LED subblock brightnesses as the brightness value which is provided for the corresponding control region by the LED subblock, and substituting the brightness value in the system of equations to solve the brightness of each LED subblock; and adjusting the brightness of the LED subblock on the side face of the light guide plate according to the obtained brightness of each LED subblock. The invention can realize sidelight LED dimming.

Description

technical field [0001] The invention relates to a method for controlling dynamic partitions of LED backlights, in particular to a method for controlling dynamic partitions of side-light LED backlights. Background technique [0002] Since the liquid crystal itself does not emit light, it is necessary to add a backlight module at the back of the liquid crystal panel, and use the light of the backlight module to emit light to display images on the liquid crystal panel. With the development of LED technology, direct-lit backlights and edge-lit backlights have been widely used in the field of LCD TV backlights. Since direct-lit backlights directly emit light from one LED to the back of the LCD panel, to achieve Regional dimming only needs to use PWM or linear control to realize dynamic dimming of LED lamps or blocks. The side-light type needs to guide the brightness of the LED to the back of the LCD panel through a light guide plate, so it is quite difficult to realize dynamic d...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
Inventor 毕权武
Owner GUANGZHOU SKYWORTH PLANE DISPLAY TECH
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