High-homogenized ultra-thin LCD backlight device

A liquid crystal display and backlight device technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of uneven output light, sensors cannot detect data, obstruct light, etc., to reduce costs, avoid loss of luminous flux, The effect of increasing brightness
CN1991510AInactive Publication Date: 2007-07-04DYNASCAN TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
DYNASCAN TECH
Publication Date
2007-07-04
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a LCD backlight device that includes several LED as the light source, and a uniform cavity mounted between the LED and the back of LED. The ray emitted from the LED are mixed and homogenized via several reflections to form a homogenizing front lighting, and it can omit the diffusing lens and the prismatic lens to reduce the cost and avoid the loss of luminous flux. The backlight device can reduce the thickness at the lowest and not need sacrifice the cost, heat dispersion and power, the service time, the whole homogenization of surface light is not affected by the difference of brightness,the chroma of special LED, and the fault.
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Description

technical field

[0001] The invention relates to the field of liquid crystal display backlight devices, in particular to a liquid crystal display backlight device using light-emitting diodes as light sources. Background technique

[0002] Common liquid crystal display (LCD) or LCD TV backlight device (or backlight module, backlight module) mostly uses cold cathode fluorescent tube (Cold Cathode Fluorescent Lamp, CCFL) or light emitting diode (light emitting diode, LED) as light source, with side light The method enters from the side of the light guide plate of the backlight device, and the incident light is guided out from the light emitting surface of the light guide plate by the diffusion dot laid inside the light guide plate. Since the light emitting angle is very large, it is still One or more diffusion plates and prism plates must be used to homogenize and concentrate the angles to increase brightness and uniformity.

[0003] As the size of the LCD increases, the above-...

Claims

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