LED backlight module used for liquid crystal display

A liquid crystal display and backlight module technology, applied in optics, nonlinear optics, instruments, etc., can solve the problem of insufficient uniformity of the backlight of the liquid crystal display
CN101806977AInactive Publication Date: 2010-08-18深圳市中庆微科技开发有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
深圳市中庆微科技开发有限公司
Publication Date
2010-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an LED backlight module used for a liquid crystal display, which comprises at least four light-emitting units, a light guide plate and a regulation unit, wherein each LED light-emitting unit is provided with red, blue and green LEDs; the light guide plate is in a rectangular shape, four point angles of the light guide plate are respectively provided with an LED light-emitting unit, light outlet surfaces of two LED light-emitting units arranged diagonally are arranged oppositely; grooves containing the light outlet surfaces of the corresponding LED light-emitting units are arranged corresponding to each LED light-emitting unit, and the shape and the size of the groove are consistent with those of the light outlet surface of the LED light-emitting unit, which is correspondingly contained by the groove; the regulation unit comprises a control module and a PWM modulator; the control module is used for generating a control signal to control each LED light-emitting unit; and the PWM modulator is used for generating a regulation signal to regulate the LED brightness of each LED light-emitting unit. The invention has the advantages of small power consumption, high light emitting efficiency, uniform light emitting and good light emitting effect.
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Description

Technical field

[0001] The present invention relates to a lighting device, in particular, to an LED backlight module for a liquid crystal display screen. Background technique

[0002] With the development of society, flat panel displays will become more and more popular, especially in the TV field. The development trend of LCD TVs is already obvious. In the future, LCD TVs will become the protagonist of large-screen flat-panel TVs.

[0003] LEDs have long been used as backlights in small LCD screens, such as mobile phones, PDAs, PMPs, GPS and other 1.5-inch to 7-inch screens, but now they are gradually developing to larger screens to eat into the CCFL market. For example, the LCD backlight of notebook computers has gradually been replaced by LEDs. In these small screen applications, most of them directly use white LEDs as backlights. Of course, LEDs have many significant advantages over CCFL, such as mercury-free, long life, large brightness adjustment range, high contrast, and st...

Claims

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