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Design method of direct type LED (light-emitting diode) backlight module

A technology of a backlight module and a design method, which is applied in the design field of direct-lit LED backlight modules, can solve problems such as crosstalk of a shutter-type 3D liquid crystal display screen, and achieve the effect of solving the problem of crosstalk and high quality

Inactive Publication Date: 2015-02-25
SICHUAN CHANGHONG PHOTOELECTRIC
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a design method of a direct-type LED backlight module to solve the crosstalk problem existing in the application of a shutter-type 3D liquid crystal display using a direct-type LED backlight

Method used

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  • Design method of direct type LED (light-emitting diode) backlight module
  • Design method of direct type LED (light-emitting diode) backlight module

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Embodiment Construction

[0021] The direct type LED backlight module design method of the present invention comprises:

[0022] a. According to the LED light mixing distance H set in the liquid crystal module, the row-direction luminous angle θ1 of the LED, and the column-direction luminous angle θ2 of the LED, determine the maximum spacing of the LEDs in the row direction and the column direction:

[0023]

[0024]

[0025] b. Based on the maximum spacing in the row direction and column direction obtained in step a, based on the maximum spacing D1 and D2 in the row direction and column direction obtained in step a, according to the row length N1 and column length N2 of the liquid crystal module, it is obtained to satisfy The minimum number of LEDs required for the basic optical requirements of the LCD module

[0026] Calculate the actual number of LEDs required according to the actual brightness requirements and energy efficiency requirements of the LCD module Where L is the brightness of...

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Abstract

The invention relates to a design method of a direct type LED (light-emitting diode) backlight module. The design method includes the steps of a, determining the largest distance of an LED in the row direction and column direction according to the LED photomixing distance and row direction emitting angle and the column direction emitting angle of the LED, which are set in a liquid crystal module, b, calculating row number and column number of LED in an effective displaying area of an LED lamp panel according to parameters and actual brightness requirments of the liquid crystal module, c, diving the LED lamp panel into i areas according to the row direction, the widths of every two areas are unequal pairwisely, and i being an integer larger than or equal to 1, and d, sequentially scanning and lightening backlight of the LED lamp panel from the divided areas through a control circuit, and controlling time delay parameters of opening every channel through a time delay mode so that the brightness ratio of two adjacent channels is lower than 30%. According to the design method of the direct type LED (light-emitting diode) backlight module, the problem of crosstalk generated when a shutter glass 3D liquid crystal display utilizes direct type LED backlight can be solved, and 3D pictures watched by users can be higher in quality and clearer.

Description

technical field [0001] The invention relates to a design method of an LED backlight module, in particular to a design method of a direct-type LED backlight module. Background technique [0002] With the rapid development of liquid crystal display technology, 3D liquid crystal display is gradually sought after by the market and consumers. In 3D LCD TVs, there is a type of shutter (also known as Shutter Glass or SG) 3D display technology. This technology uses two spaced cameras to simultaneously capture two images of the left and right eyes of the same object, and then synthesize them and display them on the display screen in a time-sharing manner, and then match them with shutter glasses with the same frequency as the time-sharing , so that the left and right eyes of the person can respectively watch the same object picture captured by the camera. Due to the difference in parallax between the two pictures, the human eyes can feel the three-dimensional image and realize the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/00F21V19/00G02F1/13357F21Y101/02F21Y105/00F21Y115/10
Inventor 杨伟茂谢均委伍强
Owner SICHUAN CHANGHONG PHOTOELECTRIC
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