CN201083845Y

CN201083845Y - Light guide board

Info

Publication number: CN201083845Y
Application number: CNU2007201785419U
Authority: CN
Inventors: 陈树盛; 张俊彬; 张裕政; 曾业勋; 蔡源龙; 简志仁; 林时正
Original assignee: Taiwan Nano Electro Optical Technology Co Ltd
Current assignee: Fuxiang Industrial Co., Ltd.
Priority date: 2007-09-18
Filing date: 2007-09-18
Publication date: 2008-07-09
Anticipated expiration: 2017-09-18

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, a light output surface corresponding to the bottom surface and a lateral surface opposite to the light entering surface, wherein, a light source is arranged on one side corresponding to the light entering surface; wherein, the bottom surface is provided with a plurality of protruding parts, each protruding part is perpendicular to the direction of the light entering surface, the distances of all the protruding surfaces decrease gradually along the direction away from the light entering surface. When the utility model is applicable to a backlight module, the shortcomings of the bad taste and the uneven brightness can be overcome.

Description

Light guide plate

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 backlight module taste and uniformity coefficient.

Background technology

Because the liquid crystal itself in the panel of LCD is not luminous, thereby, for reaching display effect, a planar light source device such as backlight module are provided must for the LCD panel, its function is to provide the planar light that briliancy is abundant and be evenly distributed to panel of LCD.

The backlight module of prior art mainly is made up of light source, light guide plate, reflecting plate, diffusion sheet and prismatic lens etc.Wherein light guide plate is one of significant components, and the transmission direction that this light-guide plate guides is sent light beam from light source converts line source or pointolite to the area source outgoing.Wherein the bright dipping briliancy of light guide plate and uniformity coefficient influence the key factor of backlight module performance.

A kind of light guide plate of prior art as shown in Figure 1, this light guide plate 1 comprises an incidence surface 11, an exiting surface 12 that links to each other with this incidence surface 11 and one and these exiting surface 12 opposed bottom surface 13.Wherein this bottom surface 13 is provided with plural V-type groove 14, the direction of this V-type groove 14 is vertical with the direction of this incidence surface 11, please consult Fig. 2 simultaneously, light imports this light guide plate 1 via this incidence surface 11, light is partly arranged directly by exiting surface 12 outgoing of this light guide plate 1, part light is the bottom surface 13 of this light guide plate 1 of directive then, and reflects in this bottom surface 13.Because this bottom surface 13 is provided with V-type groove 14, destroy light in the total reflection condition that this bottom surface 13 takes place, make light along different direction reflections, and in the exiting surface 12 of this light guide plate 1 total reflection can not take place and finally can penetrate from this exiting surface 12.Only, the height of this each V-type groove 14, angle and distribution density are all identical, can't reach the uniformity coefficient and the requirement of bright dipping briliancy of whole light guide plate.

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 backlight module taste and uniformity coefficient.

In view of this, light guide plate of the present utility model includes bottom surface that an incidence surface, intersects with this incidence surface, an exiting surface relative with this bottom surface at least, and a side relative with this incidence surface, and light source is arranged at a side that should incidence surface; Wherein this bottom surface is provided with plural lug boss, and each lug boss is vertical with the direction of incidence surface, and the spacing of each lug boss is along successively decreasing away from the direction of this incidence surface.

The beneficial effects of the utility model are: can improve the shortcoming of sampling bad and bright dark inequality in being applied to backlight module.

Description of drawings

Fig. 1 is for practising the structural perspective that light guide plate is arranged;

Fig. 2 is the opticpath figure of light guide plate shown in Figure 1;

Fig. 3 is applied to the structural perspective of backlight module for the utility model first embodiment light guide plate;

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

Fig. 5 is the structural perspective of the utility model second embodiment light guide plate;

Fig. 6 is the structural representation of the utility model second embodiment light guide plate;

Fig. 7 is the structural representation of the utility model the 3rd embodiment light guide plate;

Fig. 8 is the structural perspective of the utility model second embodiment light guide plate.

[figure number explanation]

Light guide plate 1 incidence surface 11

Exiting surface 12 bottom surfaces 13

V-type groove 14 light guide plate 2

Incidence surface 21 bottom surfaces 22

Exiting surface 23 sides 24

Lug boss 25 light sources 3

Embodiment

Your auditor is convenient to understand content of the present utility model in order to make, and the effect that can reach, cooperates the graphic specific embodiment of enumerating now, and introduction is described as follows in detail:

The utility model light guide plate, the basic structure of this light guide plate 2 is formed shown in first embodiment of Fig. 3, it includes at least: bottom surface that incidence surface 21, intersects with this incidence surface 21 22, an exiting surface 23 relative with this bottom surface 22, an and side 24 relative with this incidence surface 21, and light source 3 is arranged at a side that should incidence surface 21, and forms the structure of a backlight module.

Wherein, this bottom surface 22 is provided with plural lug boss 25, each lug boss 25 is vertical with the direction of incidence surface 21, the spacing of each lug boss 25 is along successively decreasing away from the direction of this incidence surface 21, among the embodiment as shown in the figure, each lug boss 25 is the V-arrangement projection, and the spacing of each lug boss 25 is identical in incidence surface 21, and the spacing of each lug boss 25 24 is zero in the side, please consult shown in Figure 4 simultaneously, the width of each lug boss 25 increases progressively along the direction away from this incidence surface 21, that is each lug boss 25 is in the width W 1 of incidence surface 21 width W 2 less than side 24.

Among second embodiment as shown in Figure 5, the spacing of each lug boss 25 is along successively decreasing away from the direction of this incidence surface 21, among the embodiment as shown in the figure, each lug boss 25 is the V-arrangement projection, and the spacing of each lug boss 25 is identical in incidence surface 21, and the spacing of each lug boss 25 24 is zero in the side, please consults shown in Figure 6ly simultaneously, and the height of projection of each lug boss 25 increases progressively along the direction away from this incidence surface 21.

Among the 3rd embodiment as shown in Figure 7, the spacing of each lug boss 25 is along successively decreasing away from the direction of this incidence surface 21, and the spacing of each lug boss 25 24 is zero in the side, the height of projection of each lug boss 25 increases progressively along the direction away from this incidence surface 21, and the width of each lug boss 25 increases progressively along the direction away from this incidence surface 21.

Among the 4th embodiment as shown in Figure 8, the spacing of each lug boss 25 is along successively decreasing away from the direction of this incidence surface 21, and the spacing of each lug boss 25 24 is zero in the side, the density of each lug boss 25 increases progressively along the direction away from this incidence surface 21, among the embodiment as shown in the figure, when the side extended the appropriate position, each lug boss 25 respectively was divided into two lug bosses 25 to each lug boss 25 by incidence surface 21, and the quantity that makes each lug boss 25 on this incidence surface 21 is half of side 24.

When this backlight module specifically used, as shown in Figure 3, each light source 3 entered light guide plate 2 via incidence surface 21, part light was arranged directly by exiting surface 23 outgoing of this light guide plate 2, and part light is the bottom surface 22 of this light guide plate 2 of directive then, and reflects in this bottom surface 22.Because this bottom surface 22 is provided with lug boss 25, destroy the total reflection condition that light takes place in this bottom surface 22, make light along different direction reflections, and in the exiting surface 23 of this light guide plate 2 total reflection can not take place finally can penetrate from this exiting surface 23, and the setting of each lug boss 25 can improve the shortcoming that backlight module is sampled bad and bright dark inequality.

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

Claims

1. light guide plate, its light guide plate include bottom surface that an incidence surface, intersects with this incidence surface, an exiting surface relative with this bottom surface at least, and a side relative with this incidence surface; It is characterized in that:

This bottom surface is provided with plural lug boss, and each lug boss is vertical with the direction of incidence surface, and the spacing of each lug boss is along successively decreasing away from the direction of this incidence surface.

2. light guide plate according to claim 1 is characterized in that, the spacing of each lug boss is zero in the side.

3. light guide plate according to claim 1 is characterized in that, the height of projection of each lug boss increases progressively along the direction away from this incidence surface.

4. as light guide plate as described in claim 1 or 3, it is characterized in that the width of each lug boss increases progressively along the direction away from this incidence surface.

5. light guide plate according to claim 1 is characterized in that each lug boss is the V-arrangement projection.

6. light guide plate according to claim 1 is characterized in that, the density of each lug boss increases progressively along the direction away from this incidence surface.

7. as light guide plate as described in the claim 6, it is characterized in that the quantity of each lug boss is half of side on this incidence surface.

8. light guide plate according to claim 1 is characterized in that the spacing of each lug boss is identical in incidence surface.

9. light guide plate according to claim 1 is characterized in that a side of light guide plate incidence surface is provided with light source.