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Back light unit

A technology of backlight module and light guide plate, which is applied in the direction of optics, light guide, light source, etc., can solve the problems of uneven illumination of surface light sources and inability to completely eliminate dark areas, and achieve the effects of low cost, reduced quantity, and uniform brightness

Inactive Publication Date: 2014-10-29
HB TECH CO LTD
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Problems solved by technology

[0008] However, if this technology is applied to a large TV larger than the display, the distance between the LED light sources will become wider. The previous design of the sawtooth structure not only cannot completely eliminate the dark area, but also depends on the conditions such as the processing state of the sawtooth structure. Secondary problems such as unevenness of illuminance

Method used

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no. 1 example

[0036] Figure 1a , Figure 1b , Figure 1c They are respectively the main oblique view, the main side view and the main plan view of the backlight module corresponding to the first embodiment of the present invention, including the light guide plate (300) and the LED light source (L).

[0037] refer to Figure 1a to Figure 1c It can be seen that in the backlight module corresponding to the first embodiment of the present invention, a dark area (dark area) is formed on the end point of the light guide plate (300) corresponding to the distance between the LED light source (L) and the LED light source (L). Domain Microstructure (320).

[0038] Here, the above-mentioned light guide plate (300) is made of a transparent material synthetic resin that can transmit light, and is made of high-transparency silicone resin, polyurethane, polystyrene (Polystyrene, PS), polycarbonate (Polycarbonate, PC), polyterephthalene Polyethylene terephthalate (PET), styrene-methyl methacrylate MS (...

no. 2 example

[0057] Figure 4a , Figure 4b ,as well as Figure 4c It is the main oblique view, the main side view and the main plan view of the backlight module corresponding to the second embodiment of the present invention, including the light guide plate (600) and the LED light source (L).

[0058] refer to Figure 4a to Figure 4c It can be seen that, in the backlight module of the second embodiment of the present invention, in addition to forming a plurality of dark area prevention microstructures (620) on the incident surface of the light guide plate (600) corresponding to the distance between the LED light source (L) and the LED light source (L), , and prevent the thickness direction of the dark area microstructure (620) from being at right angles to the direction of the light guide microstructure (610), and Figure 1a to Figure 1c The backlight modules shown are the same.

[0059] If the dark area preventing microstructure (620) is formed on the incident surface of the light gu...

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Abstract

A backlight unit with a light guide plate preventing a dark area between LEDs is provided, wherein dark area-preventing patterns may adequately compensate for the brightness in a gap between the LEDs that may be a dark area even under the condition that the gap is relatively large and greater than or equal to the width of an LED and thus, uniform brightness may be obtained without an occurrence of the dark area. Accordingly, the number of the LEDs may decrease and thus, a large-sized backlight unit may be fabricated with a relatively low cost.

Description

technical field [0001] The invention relates to a backlight module with a light guide plate for preventing dark areas between LED (Light Emitting Diode) light sources. Specifically, the present invention relates to a microstructure for preventing dark areas including various inclination angles and curvature radii on the incident surface of a light guide plate adjacent to an LED light source in a photometric (edge) backlight module, thereby A technology that achieves the effect of no dark area and uniform brightness. Background technique [0002] Generally speaking, the Light Guide Panel (Light Guide Panel) provides a path for the uniform emission and diffusion of light emitted from the light source, and is applied to the Backlight Unit (BLU). It is mainly used in non-emissive displays such as liquid crystal displays or Light box signs and other devices. [0003] According to the content of Japanese Patent Publication No. 2004-325959 using the backlight module, the light em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V8/00G02B6/00G02F1/13357F21Y101/02
CPCG02B6/0018G02B6/0073G02B6/0016G02B6/0036G02B6/0068
Inventor 柳忠烨朴大成李承根
Owner HB TECH CO LTD
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