CN201555153U

CN201555153U - Uniform high-brightness side-light type backlight source

Info

Publication number: CN201555153U
Application number: CN2009202609589U
Authority: CN
Inventors: 宋义; 苏遵惠; 张俊锋
Original assignee: Shenzhen Diguang Electronics Co Ltd
Current assignee: Imperial electronic (Yangzhou) Co. Ltd.
Priority date: 2009-12-01
Filing date: 2009-12-01
Publication date: 2010-08-18
Anticipated expiration: 2019-12-01
Also published as: WO2011066692A1

Abstract

The utility model provides a uniform high-brightness side-light type backlight source, which is adaptable to the field of backlight sources. The uniform high-brightness side-light type backlight source comprises a light guide plate, light sources and a diffusion film, wherein the light sources are arranged on lateral surfaces of the light guide plate, the diffusion film is arranged on the upper surface of the light guide plate, and at least one lateral surface of the light guide plate is provided with a reflecting film. The uniform high-brightness side-light type backlight source reflects light emitted from the lateral surfaces of the light guide plate by aid of the reflecting film, leads light to enter the light guide plate again, reduces light loss, increases conversion rate among the light sources and increases backlight brightness, thereby increasing brightness of a liquid crystal display module.

Description

Even high brightness side-light type back light

Technical field

The utility model belongs to the backlight field, relates in particular to a kind of even high brightness side-light type back light.

Background technology

Along with the progress of Display Technique, liquid crystal indicator is towards ultra-thinization, high brightness, and the direction of equalizing light rays develops, and the development of Display Technique drives development backlight.Because side-light type back light has gently, thin, advantages such as power consumption is low are widely used in liquid crystal indicator, side-light type back light receives much concern because of it is frivolous, and, with the LED light lamp group be that the side-light type back light of light source relies on that its color reducibility is good, convenient management, advantage such as brightness uniformity is good, the life-span is long, safety, environmental protection, anti-seismic performance are good, be widely used in the small-medium size panel display spare, just progressively expanded to large size panel displays such as notebook computer, desktop computer, television sets.

But, utilization rate backlight is very low in the existing LCD MODULE, causes backlight illumination not high, because side light type back light source module is that spot light or line source are converted into area source, the transformation efficiency that improves between the light source can promote backlight illumination, thereby improves the brightness of LCD MODULE.Therefore, how improving the transformation efficiency between the light source, is the main difficulty that prior art faces.

The utility model content

The purpose of this utility model is to solve the not high problem of back light source brightness of the prior art, and a kind of side-light type back light of high brightness is provided.

The utility model is achieved in that a kind of high brightness side-light type back light, comprises LGP, is located at the light source of described LGP side and the diffusion barrier of being located at described LGP upper surface, and at least one side of described LGP is provided with reflectance coating.

Further, described LGP lower surface is processed with reticulate structure.

Particularly, the reticulate structure density that approaches described light source reduces gradually, and the reticulate structure density that is away from described light source increases gradually.

Further, this high brightness side-light type back light also comprises the reflector of being located at the described light source outside.

Particularly, described reflector is trapezoidal, groove shape or circular arc.

Particularly, described light source is located at a side, both sides or three sides of described LGP.

Particularly, described light source is a plurality of LED spot lights of word order, and described LED spot light is located on the pcb board.

More specifically, the spacing between the LED of described pcb board zone line spot light is big, and the spacing between the LED of described pcb board two side areas spot light is little.

The utility model adopts reflectance coating that the light that penetrates from the LGP side is reflected, and makes light reenter LGP, has reduced light losing, has improved the conversion ratio between the light source, has improved backlight illumination, thereby has also improved the brightness of LCD MODULE.

Description of drawings

Fig. 1 is the schematic diagram that a side that the utility model embodiment provides is provided with the side-light type back light of light source;

Fig. 2 is the cutaway view of Fig. 1;

Fig. 3 is the plan view of the reticulate structure among Fig. 2;

Fig. 4 is the schematic diagram that both sides that the utility model embodiment provides are provided with the side-light type back light of light source;

Fig. 5 is the cutaway view of Fig. 4;

Fig. 6 is the plan view of the reticulate structure among Fig. 5.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As Fig. 1～shown in Figure 6, the even high brightness side-light type back light that the utility model embodiment provides, comprise LGP 1, be located at the light source 2 of described LGP 1 side and the diffusion barrier 3 of being located at described LGP 1 upper surface, at least one side of described LGP 1 is provided with reflectance coating 4.Described light source 2 is used to produce light; Described LGP 1 is used for the light that light source 2 produces being reflected and reflecting; Described diffusion barrier 3 is used for light is become even, soft; Described reflectance coating 4 comprises the end reflectance coating 41 that is positioned at LGP 1 lower surface and the lateral reflection film 42 of LGP 1 other side, is used for light reflected back LGP 1.

As Fig. 2～shown in Figure 6, further, described LGP 1 lower surface is processed with reticulate structure 11, the light that described reticulate structure 11 can better reflect, refract light source 2 sends, and reflect by

end reflectance coating

41 and 42 pairs of light of lateral reflection film, light is emitted from the upper surface of LGP 1.For reflection, the refraction efficient that improves 11 pairs of light of reticulate structure, reticulate structure 11 density that approach light source 2 reduce gradually, reticulate structure 11 density that are away from light source 2 increase gradually, and the variation of its size, density all can design according to the requirement to backlight of the situation of light source and LCD LCDs.

As Fig. 1, Fig. 2 and Fig. 4, shown in Figure 5, further, the high brightness side-light type back light that the utility model provides also comprises the reflector 5 of being located at described light source 2 outsides, shape such as that described reflector 5 is is trapezoidal, groove shape or circular arc.The light that light source 2 penetrates, a part directly enters LGP 1, another part is injected LGP 1 again after reflector 5 reflections of ambient light source 2, after light reflects for more than 11 time, reflects through the reticulate structure of LGP 1 lower surface therein, penetrate the exiting surface of LGP 1, part light is after reflected refraction repeatedly, be mapped on the end reflectance coating 41 of LGP 1 lower surface and the lateral reflection film 42 on LGP 1 side, end reflectance coating 41 and lateral reflection film 42 are mapped to this part light the exiting surface of LGP 1 again, realize the recycling of light, improved the utilization rate of light.

Consult Fig. 1, Fig. 2 and Fig. 4, Fig. 5 again, particularly, described light source 2 both can be located at a side (as depicted in figs. 1 and 2) of described LGP 1, also can be located at the both sides (as shown in Figure 4 and Figure 5) of described LGP 1, can also be located at three side (not shown)s of described LGP 1.

Particularly, as shown in Figure 1 and Figure 4, described light source 2 is a plurality of LED spot lights 21 of word order, and described LED spot light 21 is located on the pcb board 6.And, in order to improve brightness of illumination, spacing between the LED spot light 21 of described pcb board 6 zone lines is big, spacing between the LED spot light 21 of described pcb board 6 two side areas is little, this be because, the light range of exposures that the LED spot light 21 of zone line sends big (being generally about 120 °), light intersects many, the brightness height only needs the LED spot light 21 of negligible amounts to get final product; And the light range of exposures that the LED spot light 21 on both sides sends is little, it is also few that light intersects, and therefore, a fairly large number of LED spot light 21 need be set, could guarantee to enter the density uniformity of the light in the LGP 1 like this, and then also guarantee the brightness uniformity of LGP 1.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. an even high brightness side-light type back light comprises LGP, is located at the light source of described LGP side and the diffusion barrier of being located at described LGP upper surface, and it is characterized in that: at least one side of described LGP is provided with reflectance coating.

2. even high brightness side-light type back light as claimed in claim 1 is characterized in that: described LGP lower surface is processed with reticulate structure.

3. even high brightness side-light type back light as claimed in claim 2 is characterized in that: the reticulate structure density that approaches described light source reduces gradually, and the reticulate structure density that is away from described light source increases gradually.

4. even high brightness side-light type back light as claimed in claim 1 is characterized in that: also comprise the reflector of being located at the described light source outside.

5. even high brightness side-light type back light as claimed in claim 4 is characterized in that: described reflector is trapezoidal, groove shape or circular arc.

6. even high brightness side-light type back light as claimed in claim 1 is characterized in that: described light source is located at a side, both sides or three sides of described LGP.

7. as claim 1 or 6 described even high brightness side-light type back lights, it is characterized in that: described light source is a plurality of LED spot lights of word order, and described LED spot light is located on the pcb board.

8. even high brightness side-light type back light as claimed in claim 7 is characterized in that: the spacing between the LED of described pcb board zone line spot light is big, and the spacing between the LED of described pcb board two side areas spot light is little.