Backlight module and liquid crystal display device

A technology of backlight module and light source module, which is applied to lighting devices, fixed lighting devices, components of lighting devices, etc. Effect

Active Publication Date: 2012-10-31
SKYWORTH LCD SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, experimental studies have shown that YAG:Ce crystallites with irregular shapes are prone to aging under blue light irradiation, resulting in light attenuation of white LED devices.

Method used

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  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] refer to figure 1 , is a schematic diagram of the first embodiment of the backlight module provided by the present invention. In this embodiment, the optical plate is specifically a light guide plate. The backlight module includes a light source module 100 capable of emitting blue light, a light guide plate 200 and an optical module 300 disposed above the light guide plate 200 . The light source module 100 is disposed on the side of the light guide plate 200 .

[0025] The light guide plate 200 has a light incident surface 210, and the light incident surface 210 is coated with ZnSe:Mn quantum dot nanomaterials (not shown in the figure). Of course, the ZnSe:Mn quantum dot nanomaterial can also be deposited on the light incident surface 210 by means of evaporation. In this embodiment, the particle size of the ZnSe:Mn quantum dot nanomaterial is in the range of 5 nm to 100 nm. The use of nanomaterials with particles of this size can ensure good and stable performance. ...

Embodiment 2

[0029] refer to figure 2 , is a schematic diagram of the second embodiment of the backlight module provided by the present invention. The difference between this embodiment and the first embodiment is that the optical plate is specifically a diffuser plate 400 , and the light source module 100 is disposed below the diffuser plate 400 . The ZnSe:Mn quantum dot nanomaterial is placed on the diffusion plate 400 by coating or evaporation. The diffuser plate 400 disperses the light flux and distributes the light evenly. Other structures of the backlight module in this embodiment are the same as those in the first embodiment, and will not be repeated here.

[0030] refer to image 3 , is a schematic structural diagram of the liquid crystal display device provided by the present invention. In this embodiment, the liquid crystal display device includes a liquid crystal display panel 500 and a backlight module disposed on the back of the liquid crystal display panel 500 , wherein ...

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Abstract

The invention relates to the technical field of flat panel display, and provides a backlight module and a liquid crystal display device. The backlight module comprises a light source module, an optical panel and an optical module, wherein the light source module can emit blue light, the optical module is arranged above the optical panel, and the optical panel is provided with a ZnSe: Mn quantum dot nano material which can be excited to produce white light by the blue light. In the invention, a blue-light LED (light-emitting diode) is adopted for exciting the ZnSe: Mn quantum dot nano material, and compared with the existing fluorescent powder, the quantum dot nano material has various advantages such as controllable particle size, uniform dispersion, high and stable excited conversion efficiency, and high lighting effect; and a chip and an exciting material are separated, so that the temperatures of the two are effectively reduced, and the heat dissipation problem of LED driving is solved.

Description

technical field [0001] The present invention relates to the technical field of flat panel display, and more particularly, to a backlight module and a liquid crystal display device. Background technique [0002] Today, in the field of flat-panel display, liquid crystal display has become a mainstream product. Since the liquid crystal panel itself does not emit light, a backlight module is required to provide a light source. LEDs are widely used in backlight modules due to their advantages of energy saving, environmental protection, and stable structure. [0003] The white LEDs currently used in backlight modules generally include two types: one, the LED unit forms white light by mixing three primary color LED light sources; the other LED unit emits blue light through a blue light chip, and excites yellow phosphors to form a mixture of white light. The former method has been gradually replaced by the latter due to its high cost and difficulty in control. However, in the la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V9/08G02F1/13357F21Y101/02
Inventor 王凯郑志平
Owner SKYWORTH LCD SHENZHEN CO LTD
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