Double-color backlight board brightness control device and control method

A brightness control and backlight panel technology, which is applied in the field of two-color backlight panel brightness control devices, can solve problems such as color cast or color difference, and the brightness inconsistency between blue LED and green LED, and achieve the effect of preventing color cast

Inactive Publication Date: 2014-10-22
SCIENBIZIP CONSULTINGSHENZHENCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different luminescence curves of blue LEDs and green LEDs, the same current flows through the blue LEDs and green LEDs, making the brightness of the blue LEDs and green LEDs inconsistent, which will inevitably cause color cast or color difference

Method used

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  • Double-color backlight board brightness control device and control method
  • Double-color backlight board brightness control device and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] see figure 1 A two-color backlight brightness control device includes an image signal processing controller 10 , an LED backlight controller 50 and a two-color backlight 90 . In this embodiment, the image signal processing controller 10 is an integrated circuit modeled as STDP7320-BB.

[0024] The LED backlight controller 50 includes a conversion module 51 , a slave control module 53 and a detection module 55 .

[0025] The image signal processing controller 10 includes a main control module 11 and a storage module 13 . The two-color backlight panel 90 includes a blue LED module 91 and a green LED module 93. In this embodiment, the blue LED module 91 includes four blue LEDs coated with a red coating, and the green LED module 93 includes four green LEDs coated with a red coating.

[0026] The storage module 13 stores preset data corresponding to the brightness of the blue LED and the green LED and the duty cycle of the pulse signal. The main control module 11 is used...

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PUM

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Abstract

A brightness control device includes a back light panel, a controller, and an image signal processing chip. The back light panel includes a blue light LED module and a green light LED module. The controller includes a converting module and a sub-control module. The image signal processing chip includes a main control module and a storing module. The storing module stores first corresponding data and second corresponding data. The main control module sends two initial pulse signals corresponding to a brightness of the two light LED modules to the converting module. The converting module converts the two initial pulse signals into direct current signals and sends the direct current signals to the sub-control module. The sub-control module sends a first drive current signal and a second drive current signal to the blue light LED module and the green light LED module.

Description

technical field [0001] The invention relates to a brightness control device and a control method of a two-color backlight panel. Background technique [0002] There is a kind of blue-green LED backlight board in the existing market. The blue-light LED and the green-light LED are coated with a layer of red-light coating (that is, they emit red light under light irradiation). Through the mixing of blue light, green light and red light, blue The green LED backlight board emits white light under normal conditions. This kind of backlight board is often used in displays. The existing backlight board control device of the display is to uniformly send current signals to control blue LEDs and green LEDs. However, due to the different luminous curves of blue LEDs and green LEDs, the same current flows through the blue LEDs and green LEDs, making the brightness of the blue LEDs and green LEDs inconsistent, which will inevitably cause color cast or color difference. Contents of the in...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H05B37/02
CPCG09G5/10G06F3/1431G09G5/026G09G2300/0452G09G2320/0242G09G2320/064G09G2320/0666
Inventor廖成训巩晓强
OwnerSCIENBIZIP CONSULTINGSHENZHENCO