Backlight module, liquid crystal display and backlight drive control method

A technology of liquid crystal display and backlight module, which is applied in the field of backlight module, can solve the problems such as the matching rate cannot reach 100%, the reduction of luminous flux, the loss of the overall brightness of the liquid crystal display, etc., and achieve the effect of satisfactory color performance

Active Publication Date: 2015-07-15
BOE TECH GRP CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] sRGB100% can be achieved by using Bchip+RG pink LEDs, but Adobe’s 100% matching rate is far from reaching 100%. Replacing Bchip+RG pink LEDs with GBchip+R pink LEDs is one of the main methods to achieve Adobe100%, but the same Under low power consumption, the overall luminous efficiency of GBchip+R powder LED is low, compared with Bchip+RG powder LED, its luminous flux will be reduced by more than half
Although the transmittance of the color film using GBchip+R powder LEDs will be about 8% higher than that of using Bchip+RG powder LEDs, the overall brightness of the LCD still has a loss of more than 46%.

Method used

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  • Backlight module, liquid crystal display and backlight drive control method
  • Backlight module, liquid crystal display and backlight drive control method
  • Backlight module, liquid crystal display and backlight drive control method

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Embodiment Construction

[0027] Below in conjunction with the examples, the specific implementation of the present invention will be further described in detail. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] An embodiment of the present invention provides a backlight module, including an LED backlight and a driving circuit. The LED backlight includes an LED formed of a blue chip, red phosphor, and green phosphor (hereinafter referred to as Bchip+RG powder LED), and For an LED formed of a blue chip, a green chip and a red phosphor (hereinafter referred to as BGchip+R powder LED), the driving circuit includes a driving circuit module that drives two kinds of LEDs respectively.

[0029] Since there are two types of LEDs, Bchip+RG pink LED and BGchip+R pink LED, through the adjustment of their arrangement and quantity, it can achieve a wider color gamut than the sRGB specification, and at the same time, it wi...

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PUM

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Abstract

A backlight module, a liquid crystal display and a control method for driving the backlight source, the backlight module comprising an LED backlight source and a driving circuit, the LED backlight source comprising first LEDs each formed of a blue light chip, red phosphor powder and green phosphor powder, and second LEDs each formed of a blue light chip, a green light chip and red phosphor powder, and the driving circuit comprising driving circuit modules for driving the first LEDs and the second LEDs respectively. The liquid crystal display includes the above-mentioned backlight module and the display panel.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module, a liquid crystal display and a backlight driving control method thereof. Background technique [0002] A traditional liquid crystal display includes a display panel and a backlight module, and the backlight module includes a backlight source and a control system. At present, the backlight is generally white LED backlight, white LED can be mainly divided into Bchip+Y powder (blue chip + yellow phosphor) LED, Bchip + Yσ powder (blue chip + red and yellow phosphor) LED, Bchip + RG powder (Blue-light chip + red-green phosphor) LED, BGchip+R powder (blue-green chip + red phosphor) LED and RGBchip (red-green-blue chip) LED, the color performance capabilities of which increase sequentially. [0003] The color performance specifications of liquid crystal displays in the industry are divided into three categories from low to high: NTSC (National Television Standards ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357F21S8/00F21V9/10G09G3/36F21Y101/02F21V9/40H05B44/00
CPCH05B33/0857G02F2001/133612G02F1/133603G02F1/133621G02F1/133611G02F1/133609F21K9/56G02F2001/133614G02F1/133606G02B6/0026G02B6/0023H05B45/20G02F1/133612G02F1/133614
Inventor 林丽锋占红明王永灿
Owner BOE TECH GRP CO LTD
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