CN201811152U

CN201811152U - Light guide plate and backlight source

Info

Publication number: CN201811152U
Application number: CN2010202959496U
Authority: CN
Inventors: 袁洪亮
Original assignee: Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2010-08-17
Filing date: 2010-08-17
Publication date: 2011-04-27
Anticipated expiration: 2020-08-17

Abstract

The utility model discloses a light guide plate and a backlight source, which relate to the technical field of liquid crystal display and resolve the problem that backlight sources are higher in light leakage. Splashes on the light guide plate of an embodiment of the utility model are punctiform recesses and/or linear recesses, and a reflecting layer is formed on a surface with the splashes. The light guide plate and the backlight source are mainly used in liquid crystal displays.

Description

LGP and backlight

Technical field

The utility model relates to technical field of liquid crystal display, relates in particular to LGP used in the lcd technology and backlight.

Background technology

Backlight (Back Light) is the light source in the liquid crystal indicator, and the liquid crystal panel in the liquid crystal indicator comes display graphics or character by the modulation to backlight light.Usually backlight adopts spot light or line source as original illuminating source, by LGP, reflecting plate the light of the emission of spot light or line source is changed into the form of area source then.In the prior art, the used LGP of backlight adopts acrylic (lucite) material to make in the liquid crystal indicator, and on one side relative on the LGP, make the point that looses with exiting surface, so that light is radiated at the some back of loosing scattering taking place, can guarantee that like this light source of exiting surface is more even.

As shown in Figure 1, be manufactured with a plurality of diffusing points 2 in the prior art on the face of LGP 1, and when assembling backlight 3, need reflecting plate 4 be set in the one side of making the point 2 that looses, the light that will be spilt by the bottom surface and the side of LGP 1 is the reflected back LGP again.

State in the use in the process of LGP assembling backlight, the inventor finds that there are the following problems at least in the prior art: in the backlight assembling, LGP, housing and reflecting plate need be fitted together, because there is the processing procedure tolerance in the machining of LGP and reflecting plate, housing, so have the space between LGP and reflecting plate, the housing, understand some light and spill, reduced light efficiency from this space.And it is more that backlight is assembled required parts, causes assembling procedure comparatively complicated, reduced production efficiency.

The utility model content

Embodiment of the present utility model provides a kind of LGP and backlight, can reduce light leak, improve reflection efficiency.

For achieving the above object, embodiment of the present utility model adopts following technical scheme:

A kind of LGP, the diffusing point on the described LGP are pitting and/or wire depression; The described face that is manufactured with the point that looses is formed with the reflecting layer.

A kind of backlight comprises light source and LGP, and described LGP is any described LGP in the claim 1 to 6.

LGP that the utility model embodiment provides and backlight, because the diffusing point of LGP adopts the mode of pitting and/or wire depression to make, and the face that is manufactured with the point that looses is formed with the reflecting layer, the LGP and the backlight that adopt the utility model embodiment to provide, need on LGP, not print the diffusing point of one deck separately, need reflecting plate be set yet, directly utilize the reflecting layer that makes on the LGP that light is reflected in the one side of making the point that looses.Because the reflecting layer is formed directly on the LGP, and very close to each other between the LGP, reflection efficiency so can reduce light leak after adopting the utility model embodiment, has been improved in the gap when also not having assembling LGP and reflecting plate.

And the LGP and the backlight that adopt the utility model embodiment to provide owing to no longer need to install reflecting plate when the assembling backlight, can reduce mounted component, thereby the assembling procedure of simplification backlight are to enhance productivity; When saving reflecting plate, can reduce the cost of backlight.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structure chart of backlight in the prior art;

Fig. 2 is the structure chart of LGP among the utility model embodiment;

Fig. 3 is the structure chart of backlight among the utility model embodiment.

The specific embodiment

The utility model embodiment forms the diffusing point of concave form on LGP, and be formed with the reflecting layer at face with the point that looses, thereby saved original reflecting plate, the assembling procedure that can simplify backlight to be enhancing productivity, and can reduce the cost of backlight.

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

Embodiment 1:

As shown in Figure 2, the utility model embodiment provides a kind of LGP 11, and the diffusing point 12 on the described LGP 11 is pitting and/or wire depression, when actual fabrication, can a little 12 all be made as pitting with loosing as required; Perhaps will loose and a little 12 all be made as the wire depression; Perhaps portion's spaced point 12 is made as pitting, portion's spaced point 12 is made as the wire depression, and present embodiment is not done qualification.As shown in Figure 2, the utility model embodiment also is formed with reflecting layer 13 at the described face that is manufactured with the point 12 that looses.In general, can be by mode deposition of reflective layer 13 on the face that is manufactured with the point that looses on the described LGP of silver mirror reaction, perhaps by other techniques of deposition reflecting layer.

After adopting LGP shown in Figure 2, when the assembling backlight, need on LGP, not print the diffusing point of one deck separately, need reflecting plate be set in the one side of making the point that looses yet, directly utilize the reflecting layer that makes on the LGP that light is reflected, very close to each other between the reflecting layer of this formation and the LGP, the gap when also not having assembling LGP and reflecting plate, so can reduce light leak after adopting the utility model embodiment, improve reflection efficiency.

And, can reduce mounted component after adopting above-mentioned LGP, as: no longer need to install reflecting plate, thereby the assembling procedure of simplifying backlight is to enhance productivity; When saving reflecting plate, can reduce the cost of backlight.

The point that looses the method on the LGP of directly being produced on can be adopted but be not limited to: chemical etching method, precision optical machinery etching method and light lithography method etc.Can form the diffusing point of concave form by said method, and place, the summit of depression can produce scattering, the effect of the point that looses is that the light to light emitted carries out scattering, and the light of the point scattering that the loose layer that is reflected reflects.

In order to make the reflecting layer can reflect light as much as possible, reduce light leak better, improve reflection efficiency, reflecting layer among the utility model embodiment covers planar section and the sunk part on the described face that is manufactured with the point that looses, and makes the whole face that is manufactured with the point that looses all can produce reflection to light.

Be formed with the reflecting layer on the face of LGP described in the utility model embodiment except that the described face that is manufactured with the point that looses, incidence surface, exiting surface,, can improve reflection efficiency by on other faces, forming emission layer.

In addition, the face that is manufactured with the point that looses among the utility model embodiment is the face except that incidence surface and exiting surface on the LGP, and in general, conventional mode a little is produced on the one side relative with exiting surface for loosing.

When actual fabrication, pitting can be made into different shape, include but not limited to taper or taper type, generally speaking, can determine to make the pitting of which kind of shape according to the processing technology that is adopted, as: can make when adopting laser ablation taper, can make frustum shape or the like when adopting photoetching process.And the depression of the wire among the utility model embodiment also can be made into multiple shape, and wherein the cross section of wire depression is under the situation of " V " shape, and its dispersion effect to light is preferable; And in order to make the wire depression have better dispersion effect, the wire depression of the utility model embodiment need be parallel to the incidence surface of described LGP.

More even for the light source of LGP exiting surface, following scheme is adopted in the distribution of the diffusing point of the utility model embodiment: the diffusing dot density of close incidence surface is less than the diffusing dot density away from incidence surface.Because incidence surface light intensity more nearby is stronger, away from the light intensity of incidence surface then a little less than, the closeer diffusing point that distributes in the more weak place of light intensity can strengthen the scattering of light, makes that whole exiting surface distribution of light is more even.

Embodiment 2:

The utility model embodiment also provides a kind of backlight, as shown in Figure 3, described backlight comprises light source 21 and LGP 22, LGP 22 among Fig. 3 is the LGP described in the foregoing description 1, diffusing point 27 on the described LGP 22 is pitting and/or wire depression, and the described face that is manufactured with the point 27 that looses is formed with reflecting layer 28.

The exiting surface place of above-mentioned LGP 22 is provided with diffusion sheet 23, two-layer prismatic lens 24, screening glass 25 successively, makes that the light of outgoing is more even; The incidence surface place of above-mentioned LGP 22 is provided with described light source 21, and by reflector 26 described light source 21 is covered on inside, so that the light of light source 21 is reflexed in the LGP 22 as much as possible.

The LGP that the utility model embodiment backlight is adopted is except being formed with the reflecting layer at the face that is manufactured with the point that looses, and can also have other characteristics of LGP described in the embodiment 1, repeats no more herein.

Because the LGP 22 among Fig. 3 is the LGP in the foregoing description 1, so, when the described backlight of assembling, need on LGP 22, not print the diffusing point of one deck separately, need reflecting plate be set yet, directly utilize the reflecting layer that makes on the LGP that light is reflected in the one side of making the point that looses; Can reduce mounted component, thereby the assembling procedure of simplification backlight is to enhance productivity; When saving reflecting plate, can reduce the cost of backlight.

The utility model embodiment mainly is used in the liquid crystal indicator.

The above; it only is the specific embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion by described protection domain with claim.

Claims

1. a LGP is characterized in that, the diffusing point on the described LGP is pitting and/or wire depression; The face that described LGP is manufactured with the point that looses is formed with the reflecting layer.

2. LGP according to claim 1 is characterized in that, described reflecting layer is deposited on the face that is manufactured with the point that looses on the described LGP by the mode of silver mirror reaction.

3. LGP according to claim 1 is characterized in that, described reflecting layer is formed on planar section and the sunk part on the face that described LGP is manufactured with the point that looses.

4. LGP according to claim 1 is characterized in that, described pitting is taper or taper type; The cross section of described wire depression is " V " shape.

5. LGP according to claim 1 is characterized in that, described wire depression is parallel to the incidence surface of described LGP.

6. LGP according to claim 1 is characterized in that, the diffusing dot density of close light source is less than the diffusing dot density away from light source on the described LGP.

7. according to any described LGP in the claim 1 to 6, it is characterized in that, be formed with the reflecting layer on the face of described LGP except that the described face that is manufactured with the point that looses, incidence surface, exiting surface.

8. a backlight comprises light source and LGP, it is characterized in that, described LGP is any described LGP in the claim 1 to 6.