CN201083843Y

CN201083843Y - Light guide board and backlight module

Info

Publication number: CN201083843Y
Application number: CNU2007201692378U
Authority: CN
Inventors: 陈树盛; 张俊彬
Original assignee: Taiwan Nano Electro Optical Technology Co Ltd
Current assignee: Da Yun Precision Industrial stock Co., Ltd
Priority date: 2007-06-26
Filing date: 2007-06-26
Publication date: 2008-07-09
Anticipated expiration: 2017-06-26

Abstract

The utility model provides a light guide plate, at least comprising a light entering surface, a bottom surface intersected with the light entering surface and a light output surface opposite to the bottom surface, wherein, a light source is arranged on one side corresponding to the light entering surface, the bottom surface and the light output surface are provided with a plurality of grooves, the grooves of the bottom surface and the light output surface are respectively arranged in an X direction and Y direction; wherein, the grooves on one surface of the bottom surface or the light output surface are vertically arranged, while the vertically arranged groove cross sections are provided with a vertex angle B, the vertex angle B inside each groove ranges from 60 degrees and 40 degrees and is not equal to 90 degrees. When the utility model is applicable to a backlight module, the brightness of the backlight module is greatly improved.

Description

Light guide plate and backlight module

Technical field

The utility model provides a kind of light guide plate, aims to provide a kind of can be applicable in the backlight module, and can improve the light guide plate of this brilliancy of backlight module.

Background technology

The LCD that has the side light back light unit because volume is little, in light weight and brightness is even, therefore is widely used in fields such as notebook, Vehicular display device, mobile phones.Energy of backlight liquid crystal display module changes into spaced point light source or line source the optical facilities of uniform planar light source.Along with the expansion in liquid crystal display applications field, the backlight technology based on light guide plate has been proposed requirements at the higher level, mainly find expression in: high brightness, low cost, low energy consumption, lightening etc.

As shown in Figure 1, at present traditional backlight module 1 comprises light source 10, light guide plate 12, several pieces of blooming pieces and display panel 14, and according to the function difference, blooming piece has respectively: reflector plate 11 and diffusion sheet 13.Wherein the light that will not be scattered of reflector plate 11 imports in the light guide plate 12 again, and diffusion sheet 13 makes light form diffusion and evenly diffusion, eliminates the clear zone that microstructure forms on the light guide plate 12.

Wherein, the major function of light guide plate 12 is to convert the light that directly advances of light source 10 incidents to vertical plane light by light principle at random, but in order to reach all effects of light of scattering, usually between diffusion barrier sheet 13 and display panel 14, can be equipped with two diaphragms 15 that add lustre to, and be provided with optical texture 151 (optical texture is continuous sawtooth channel form) in diaphragm 15 upper faces that respectively add lustre to, with the equal effect of light of scattering; Yet the use of the diaphragm that adds lustre to has in addition not only increased cost, and the leaded lights in the light guide plate 12 are that total reflection causes, the light that is penetrated by light guide plate 12 and the plate face of the whole light guide plate 12 that can't distribute fully.

So there is another habit that light conducting plate structure is arranged, as shown in Figure 2, this light guide plate 12 is directly last, the lower face construction has and is continuous sawtooth groove structure 121, it is located on the light guide plate 12, the groove 121 of lower face becomes X respectively, the Y direction is arranged, for example be located at 121 one-tenth homeotropic alignments of groove of upper face, the groove 121 of lower face then forms horizontally, allow the light that directly advances of light source 10 incidents convert to after the vertical plane light through light guide plate 12, groove 121 through light guide plate 12 plate faces makes light at X again, Y direction light harvesting is also adjusted the divergence of beam angle, and the effect that has optically focused and add lustre to; Yet each groove 121 cross section of this light guide plate have a drift angle A, and as shown in Figure 3, this drift angle A is 90 degree, and particularly is positioned on the groove 121 of homeotropic alignment, make inject light guide plate light via each groove 121 after, can't obtain preferable briliancy performance.

The utility model content

Fundamental purpose of the present utility model is to provide a kind of can be applicable in the backlight module, and can improve the light guide plate of this brilliancy of backlight module.

In view of this, light guide plate of the present utility model includes an incidence surface, one and this incidence surface bottom surface of intersecting at least, an and exiting surface relative with this bottom surface, and light source is arranged at a side that should incidence surface, this bottom surface and exiting surface construction have plural groove, and the groove of this bottom surface and exiting surface becomes X, Y direction to arrange respectively; Wherein the groove of this bottom surface or exiting surface one side becomes homeotropic alignment, the trench cross section that forms homeotropic alignment has a drift angle B, drift angle B span 60 degree≤B in each groove≤140 degree, and drift angle B is not equal to 90 degree, can improve the briliancy of this backlight module in being applied to backlight module.

The beneficial effects of the utility model are: can obtain a kind of can be applicable in the backlight module, and can improve the light guide plate of this brilliancy of backlight module.

Description of drawings

Fig. 1 is for practising the schematic side view that backlight module is arranged;

Fig. 2 has the schematic side view of backlight module for another habit;

Fig. 3 is the part enlarged diagram of light guide plate among Fig. 2;

Fig. 4 is the structural perspective of the utility model first embodiment light guide plate;

Fig. 5 is the part enlarged diagram of the utility model first embodiment light guide plate;

Fig. 6 is applied to the structural representation of backlight module for the utility model light guide plate;

Fig. 7 is the structural perspective of the utility model second embodiment light guide plate;

Fig. 8 is the part enlarged diagram of the utility model second embodiment light guide plate.

[figure number explanation]

Backlight module 1 light source 10

Reflector plate 11 light guide plate 12

Groove 121 diffusion sheets 13

Display panel 14 diaphragm 15 that adds lustre to

Optical texture 151 light guide plate 2

Incidence surface 21 bottom surfaces 22

Exiting surface 23 grooves 24

Light source 3 reflector plates 4

Blooming piece 5 diffusion sheets 51

Sheet prismatic lens 52 panels 6

Embodiment

The utility model light guide plate and backlight module, as shown in Figure 4, the basic structure of this light guide plate 2 is formed as shown in Figure 4, it includes at least: incidence surface 21, one bottom surface 22 of intersecting with this incidence surface 21, an and exiting surface 23 relative with this bottom surface 22, and light source 3 is arranged at a side that should incidence surface 21, this bottom surface 22 and exiting surface 23 construction have plural groove 24, the groove of this bottom surface 22 and exiting surface 23 becomes X respectively, the Y direction is arranged, among the embodiment as shown in the figure, 24 one-tenth of the grooves of this bottom surface 22 are horizontal, and the groove 24 of exiting surface 23 then forms homeotropic alignment.

This case focuses on: each groove 24 cross section has a drift angle B, consult simultaneously shown in Figure 5, the span 60 degree≤B of drift angle B in each groove 24 of this exiting surface 23≤140 degree, and drift angle B is not equal to 90 degree, the light that makes light source 3 via each groove 24 after, can have preferable emission angle; Certainly, the span of the drift angle B of this each trench cross section of exiting surface can also be 60 degree≤B≤140 degree, and drift angle B is not equal to 90 degree.

As shown in Figure 6, be applied to the structural representation of backlight module for the utility model light guide plate, this backlight module includes at least: above-mentioned light guide plate 2, light source 3, reflector plate 4, plural number blooming piece 5 and panel 6, this light source 3 is arranged at a side of corresponding light guide plate incidence surface 21, this light source 3 can be line source or pointolite (as shown in Figure 7), 4 of reflector plates are located at light guide plate 2 belows, plural number blooming piece 5 and 6 of panels are located at light guide plate 2 tops in regular turn, wherein each blooming piece can be a slice prismatic lens 52, diffusion sheet 51, behind the refraction action of the light of this light source 3 via each groove 24 of light guide plate, can have preferable emission angle, to improve the briliancy of this integral body backlight module.

Among second embodiment as shown in Figures 7 and 8,24 one-tenth of the grooves of this exiting surface 23 are horizontal, the groove 24 of bottom surface 22 then forms homeotropic alignment, the span 60 degree≤B of drift angle B in 22 each groove 24 of bottom surface≤140 degree, and drift angle B is not equal to 90 degree, the light that makes light source 3 via each groove 24 after, can have preferable emission angle; Certainly, the span of the drift angle B of this each trench cross section of exiting surface can also be 60 degree≤B≤140 degree, and drift angle B is not equal to 90 degree.

As mentioned above, the utility model provides another preferable feasible light guide plate and backlight module, so offer the application of novel patent in accordance with the law; Yet, above implementation and graphic shown in, be the utility model preferred embodiment, be not to limit to the utility model with this, be with, approximate with structure of the present utility model, device, feature etc., identical such as, all should belong to of the present utility model founding within purpose and the claim.

Claims

1. light guide plate, its light guide plate includes an incidence surface, one and this incidence surface bottom surface of intersecting at least, and an exiting surface relative with this bottom surface, this bottom surface and exiting surface construction have plural groove, and the groove of this bottom surface and exiting surface becomes X, Y direction to arrange respectively; It is characterized in that:

This bottom surface or exiting surface each trench cross section of one side at least have a drift angle B, the span 60 degree≤B of drift angle B in each groove≤140 degree, and drift angle B is not equal to 90 degree.

2. light guide plate according to claim 1 is characterized in that each groove of this bottom surface becomes homeotropic alignment, and each groove of exiting surface then forms horizontally, the span 60 degree≤B of the drift angle B of its each trench cross section of bottom surface≤140 degree, and drift angle B is not equal to 90 degree.

3. as light guide plate as described in the claim 2, it is characterized in that, the span 60 degree≤B of the drift angle B of this each trench cross section of exiting surface≤140 degree, and drift angle B is not equal to 90 degree.

4. light guide plate according to claim 1, it is characterized in that each groove of this bottom surface becomes horizontally, each groove of exiting surface then forms homeotropic alignment, the span 60 degree≤B of the drift angle B of its each trench cross section of exiting surface≤140 degree, and drift angle B is not equal to 90 degree.

5. as light guide plate as described in the claim 2, it is characterized in that, the span 60 degree≤B of the drift angle B of this each trench cross section of bottom surface≤140 degree, and drift angle B is not equal to 90 degree.

6. one kind is utilized the backlight module of light guide plate according to claim 1, it is characterized in that, its light guide plate includes an incidence surface, one and this incidence surface bottom surface of intersecting at least, an and exiting surface relative with this bottom surface, this bottom surface and exiting surface construction have plural groove, and the groove of this bottom surface and exiting surface becomes X, Y direction to arrange respectively; This bottom surface or exiting surface each trench cross section of one side at least have a drift angle B, the span 60 degree≤B of drift angle B in each groove≤140 degree, and drift angle B is not equal to 90 degree; One side of this light guide plate incidence surface is provided with light source.

7. as backlight module as described in the claim 6, it is characterized in that this light guide plate top is provided with plural blooming piece and panel.

8. as backlight module as described in the claim 7, it is characterized in that each blooming piece is a slice prismatic lens, diffusion sheet.

9. as backlight module as described in the claim 6, it is characterized in that this light guide plate below is provided with a reflector plate.