CN202758092U

CN202758092U - Light guide plate for high-power surface light source

Info

Publication number: CN202758092U
Application number: CN 201220412100
Authority: CN
Inventors: 陈焕杰; 刘祥桐
Original assignee: Guangzhou Rayton Lighting Science & Technology Co Ltd
Current assignee: Guangzhou Rayton Lighting Science & Technology Co Ltd
Priority date: 2012-08-20
Filing date: 2012-08-20
Publication date: 2013-02-27
Anticipated expiration: 2022-08-20

Abstract

The utility model relates to a light guide plate for a high-power surface light source, which is provided with concave lenses on one surface, and is provided with convex zigzag stripes on the other surface, wherein the concave lenses are arranged in an array distribution, the refractive indexes of the lenses are identical, and the curvature radiuses of the lenses are equal or gradually decrease from center to around; and the convex zigzag stripes are arranged in an array distribution, and the width of the convex zigzag stripes is less than the spacing of the stripes. The light guide plate provided by the utility model has good light diffusivity, after the light emitted by the high-power surface light source passes through the light guide plate, the brightness of the emitted light is soft and even.

Description

A kind of high-power light guide plate for surface light source

Technical field

The utility model relates to the panel light field, is specifically related to a kind of high-power light guide plate for surface light source.

Background technology

LED is the pointolite that a kind of brightness is concentrated, and easily causes direct glare because of too high light-source brightness, allows the user not feel well, and when using as area source, because brightness irregularities causes user's vision not good.

The pointolite that extensively adopts light guide plate that brightness is concentrated in the prior art is converted into area source, be 200920194488.0 Chinese utility model patents such as application number, the side luminescent panel lamp that it discloses a kind of light guide plate for surface light source and has used this light guide plate, as shown in Figure 1, be provided with a plurality of light guiding points on the one side, the area of described a plurality of light guiding points is arranged according to gradually reducing from the centre to the periphery on this light guide plate.

The light guide plate manufacture craft of above-mentioned patent structure is simple, with low cost, but its light diffusion effect is relatively poor, and after powerful area source carried out the light diffusion through this light guide plate, brightness was still comparatively concentrated.

The utility model content

For the problems referred to above, the utility model provides a kind of high-power light guide plate for surface light source, and its light diffusing is good, and the light that high-power area source sends carries out penetrating after the light diffusion through this light guide plate, and the brightness of emergent light is comparatively soft, and very even.

In order to achieve the above object, the technical solution adopted in the utility model: a kind of high-power light guide plate for surface light source, it simultaneously is provided with the lens of indent, and another side is provided with evagination serrate striped.

In technique scheme, interior concavees lens are array distribution, and its refractive index is identical, and radius-of-curvature equates or radius-of-curvature therefrom reduces around the mind-set successively.

In technique scheme, evagination serrate striped is array distribution, and the width of evagination serrate striped is less than fringe spacing.

In technique scheme, the outer convex surface of evagination serrate striped is level and smooth curved surface.

The beneficial effects of the utility model are: the light that area source sends the first light guiding lens of the indent by light guide plate carries out light and disperses, then in light guide plate through repeatedly reflecting and reflecting, at last reflect ejaculation at the serrate striped by evagination, powerful area source is spread fully, greatly reduced the impact of dazzle.

Description of drawings

Fig. 1 is a kind of light guide plate for surface light source of prior art and the light guide plate schematic diagram of using the side luminescent panel lamp of this light guide plate;

Fig. 2 is the structural representation of the utility model specific embodiment light guide plate;

Fig. 3 is the schematic diagram of the interior concavees lens one side of the utility model light guide plate;

Fig. 4 is the schematic diagram of the evagination serrate striped one side of the utility model light guide plate.

Embodiment

In order to understand better the technical solution of the utility model, below in conjunction with the in addition detailed description of specific embodiment of the utility model and accompanying drawing, but the utility model is not limited to this embodiment.

A kind of high-power light guide plate for surface light source 3 is provided with the lens 1 of indent on its one side, and another side is provided with evagination serrate striped 2.

In the present embodiment, interior concavees lens 1 are array distribution, and radius-of-curvature is equal, and in the process of design, led chip is positioned on the focus of concavees lens, and the pointolite that led chip can be sent becomes directional light.

In the present embodiment, evagination serrate striped 2 is equivalent to zigzag convex lens, is array distribution, and width of fringe is half of fringe spacing.

The light guide plate 3 of the present embodiment adopts the polymethyl methacrylate materials manufacturing to form, and there are a lot of tiny particles inside, can effectively strengthen the diffusion of light, and light transmission is good, and processing technology is simple, and is specious.

The present embodiment is in the process of installing, and light guide plate 3 is provided with the close area source of one side of interior concavees lens 1 as incidence surface, is provided with the one side of evagination serrate striped 2 as exiting surface.

The principle of work of the present embodiment is as follows: the light that area source sends is penetrated on the interior concavees lens 1 of light guide plate 3, disperses through interior concavees lens 1 and injects in the light guide plate 3; In light guide plate 3, light reflect many times through the fine particle in the light guide plate and reflect after on the light guide plate 3 the refraction of evagination serrate striped and go out.

Claims

1. high-power light guide plate for surface light source, it is characterized in that: the one side of light guide plate is provided with the lens of indent, and another side is provided with evagination serrate striped, and interior concavees lens and evagination serrate striped are array distribution.

2. light guide plate as claimed in claim 1, it is characterized in that: the refractive index of interior concavees lens is identical, and radius-of-curvature equates or radius-of-curvature therefrom reduces around the mind-set successively.

3. light guide plate as claimed in claim 1, it is characterized in that: the outer convex surface of described evagination serrate striped is level and smooth curved surface.

4. light guide plate as claimed in claim 1, it is characterized in that: the width of described evagination serrate striped is less than fringe spacing.