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Backlight assembly

A technology for backlight assembly and light source, applied in optics, diffusing elements, nonlinear optics, etc., can solve the problems of increasing the volume of the backlight assembly 10 assembly difficulty, product competitiveness slippage, light source energy loss, etc., to simplify the assembly process. and cost, enhance competitiveness, and reduce the effect of product volume

Inactive Publication Date: 2005-01-26
AU OPTRONICS CORP
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AI Technical Summary

Problems solved by technology

[0005] However if figure 1 As shown, the design of the known backlight assembly 10 will form a medium (medium) as air accommodation chamber 24 between the light guide plate 12 and the reflection plate 15, in addition to increasing the volume of the product and increasing the difficulty of assembling the backlight assembly 10. In addition, it will also cause energy loss of the light source and reduce the light utilization efficiency of the backlight assembly 10.
What's more serious is that under the known backlight assembly 10 operating for a long time, the reflection plate 15 formed by the metal plate inside it tends to be slightly distorted and deformed due to heat, resulting in a decrease in the flatness of the surface of the reflection plate 15 and consequently causing The light source reflected by it cannot have a uniform illumination intensity when it is further scattered to the display panel 11, which is commonly known as the "wave phenomenon".
This wave of vibration is enough to cause flaws in the display quality of the display panel 11, resulting in a sharp drop in product competitiveness

Method used

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Embodiment Construction

[0028] Referring to FIG. 2 , FIG. 2 is a schematic cross-sectional view of an edge light (edge ​​light) backlight unit (BLU) 40 of the present invention. As shown in FIG. 2 , the backlight assembly 40 is disposed under a display panel (displaypanel) 41, and the backlight assembly 40 includes: a light guide plate (LGP) 42, a first side surface of the light guide plate 42 A light source generator (light source generator) 44 of 42a, a diffusing plate (diffusing plate) 46 located above the light guide plate 42, at least one prism (prism) 48 located on the surface of the diffusing plate 46, and a diffuser plate (prism) 48 located on the light guide plate 42 and covers the housing 50 around the light guide plate 42 and the light source generator 44 .

[0029] The light source generator 44 is generally a lamp tube used to provide a light source, and the light guide plate 42 includes a bottom surface (bottom surface) 42b coated on the light guide plate 42 for upward reflection (reflec...

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Abstract

This is a apheliotropic component located under the display board, which comprises a light conductive plate and a light source generator which is located on first side surface of the plate and used to provide a light source. The light conductive plate comprises of a base surface coated on the plate and the first reflecting film for the light source. The light conductive plate is used to diffuse the light source reflected from its top surface to the display board.

Description

technical field [0001] The invention relates to a back light unit (BLU), in particular to a back light unit coated with a light guide plate (LGP) with a reflective film. Background technique [0002] Backlight components are one of the key components of liquid crystal display products, and have been widely used in digital cameras, digital personal assistants (PDAs), satellite navigation systems, computer monitors and flat-screen TVs. Generally speaking, the backlight assembly is arranged under a display panel, and has a light source generator and a diffusing plate to provide a uniformly dispersed light to the display panel, and then form appropriate images by controlling the pixel electrodes on the display panel. Wherein, the backlight assembly can be divided into a direct illuminance backlight assembly in which the light source is directly below the display panel or an edge light backlight assembly in which the light source is near the side of the display panel according t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/13357
Inventor 罗俊祥李政谋
Owner AU OPTRONICS CORP
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