CN201078650Y

CN201078650Y - Light conducting plate

Info

Publication number: CN201078650Y
Application number: CNU2007201279934U
Authority: CN
Inventors: 郑国丰; 陈为正; 何文魁; 简仲毅; 钟昀修
Original assignee: K Bridge Electronics Co Ltd
Current assignee: K Bridge Electronics Co Ltd
Priority date: 2007-08-03
Filing date: 2007-08-03
Publication date: 2008-06-25
Anticipated expiration: 2017-08-03

Abstract

The utility model relates to a light guide plate, which is provided with an incident surface, a bottom surface meeting the incident surface and a light extraction surface opposite to the bottom surface; wherein, at least one of the bottom surface and the light extraction surface are arranged with a plurality numbers of microstructures; asymmetrical first and second bevels are provided between each microstructure and a surface; a plane part is provided between adjacent microstructures; when the ray is irradiated on the light guide plate through the incident surface, the total reflection can be damaged by the function of each microstructure to form better refractive light extraction angle so as to improve the brightness of the entire backlight module.

Description

LGP

Technical field

The utility model relates to light conducting plate structure, and particularly a kind of being applied to can be improved light utilization in the backlight module, and improves the light conducting plate structure of whole brilliancy of backlight module.

Background technology

Press, have the LCD of side light back light unit,, therefore be widely used in fields such as notebook, Vehicular display device, mobile phones because volume is little, in light weight and brightness is even.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 LGP 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, LGP 12, several pieces of blooming pieces and display floater 14, and according to the function difference, blooming piece has respectively: reflector plate 11 and diffusion sheet 13.Wherein this reflector plate 11 is located at LGP 12 belows, the light that is not scattered can be imported again in the LGP 12, and diffusion sheet 13 then is located at LGP 12 tops, makes light form diffusion and evenly diffusion, eliminates formed clear zone on the LGP 12.

And general LGP 12 as shown in the figure, it has an incidence surface 121, one bottom surface 122 of intersecting with this incidence surface 121, an and exiting surface 123 relative with this bottom surface 122, this exiting surface 123 is provided with plural micro-structural 124, please consult shown in Figure 2 simultaneously, the cross section of each micro-structural 124 is a triangle, and the surface of exiting surface 123 forms symmetrical first, two oblique angle A1, A2, and when the light of light source 10 is injected by the incidence surface 121 of LGP, can form total reflection phenomenon in the side of this micro-structural 124, then many light are directly bright dipping directly over micro-structural 124, thereby cause LGP to form the bright rays phenomenon.

The utility model content

The purpose of the utility model LGP and backlight module is promptly improved at the LGP that is applied to backlight module, and its main purpose ties up in a kind of light utilization that improves is provided, and improves the light conducting plate structure of whole brilliancy of backlight module.

The technical solution of the utility model is: this LGP has an incidence surface, one and this incidence surface bottom surface of intersecting, and an exiting surface relative with this bottom surface; Wherein, in this bottom surface and the exiting surface at least one side be provided with plural micro-structural, have asymmetrical first and second oblique angle between each micro-structural and surface, and between adjacent microstructures and be provided with a planar portions.

The beneficial effects of the utility model are: after light enters LGP by incidence surface, can destroy total reflection by the effect of each micro-structural, and form preferable refraction rising angle.

Description of drawings

Fig. 1 is a structural representation of commonly using backlight module;

Fig. 2 is a structural representation of commonly using LGP;

Fig. 3 is applied to the structural representation of backlight module for the first embodiment LGP in the utility model;

Fig. 4 is the part structure for amplifying schematic diagram of LGP first embodiment in the utility model;

Fig. 5 A, B are the structural representation of LGP second embodiment in the utility model;

Fig. 6 is the structural representation of LGP the 3rd embodiment in the utility model;

Fig. 7 is the structural representation of LGP the 4th embodiment in the utility model;

Fig. 8 is the structural representation of LGP the 5th embodiment in the utility model;

Fig. 9 is the structural representation of LGP the 6th embodiment in the utility model;

Figure 10 is the structural representation of LGP the 7th embodiment in the utility model.

[figure number explanation]

Backlight module 1 light source 10

Reflector plate 11 LGPs 12

Incidence surface 121 bottom surfaces 122

Exiting surface 123 micro-structurals 124

Diffusion sheet 13 display floaters 14

LGP 2 incidence surfaces 21

Bottom surface 22 exiting surfaces 23

Micro-structural 24 planar portions 25

Light source 3 diffusion sheets 4

Reflector plate 5

The specific embodiment

The utility model LGP and backlight module, the structure of this LGP 2 are shown in first embodiment of Fig. 3, and it has an incidence surface 21, one and this incidence surface 21 bottom surface 22 of intersecting, and an exiting surface 23 relative with this bottom surface 22; Wherein, at least simultaneously be provided with plural micro-structural in this bottom surface and the exiting surface, please consult shown in Figure 4 simultaneously, each micro-structural 24 is located on the exiting surface 23, and protruding from exiting surface 23 is provided with, the cross section of each micro-structural 24 includes but not limited to triangular form, have asymmetrical first and second oblique angle B1, B2 between the surface of each micro-structural 24 and exiting surface 23, B1＞B2 as shown in the figure, to form first and second inclined-plane C1, the C2 of Different Slope, and 24 of adjacent microstructures and be provided with a planar portions 25, and the height of this planar portions 25 is identical with exiting surface 23.

When LGP of the present utility model is applied in the backlight module, as shown in Figure 3, it is provided with at least one light source 3 and is located at a side with respect to LGP 2, and form light inlet by incidence surface 21 1 sides of this LGP, and the upper and lower diffusion sheet 4 and the reflector plate 5 of can further being provided with respectively of LGP 2, when the light of light source 3 forms light inlet by LGP incidence surface 21 1 sides, and change the travel path of light by first and second inclined-plane C1, the C2 of Different Slope, to destroy total reflection, and form preferable refraction rising angle, to improve the briliancy of whole backlight module.

Shown in second embodiment of Fig. 5 A, each micro-structural 24 is located on the exiting surface 23, and be recessed in exiting surface 23 and be provided with, have asymmetrical first and second oblique angle B1, B2 between the surface of each micro-structural 24 and exiting surface 23, the cross section of each micro-structural 24 includes but not limited to polygonal, shown in Fig. 5 B, the cross section of each micro-structural 24 is hexagon and B1＜B2; Certainly, each micro-structural 24 is located on the bottom surface 22, and shown in the 3rd embodiment of Fig. 6, the height of this planar portions 25 is then identical with bottom surface 22; In addition, each micro-structural 24 also can be located on bottom surface 22 and the exiting surface 23, shown in the 4th embodiment of Fig. 7, each micro-structural 24 all be recessed in the bottom surface 22 and exiting surface 23 be provided with, and each micro-structural also can all protrude from bottom surface and exiting surface setting, perhaps protrude from bottom surface (or exiting surface) and be provided with, be recessed in exiting surface (or bottom surface) setting, the height of this planar portions 25 is then identical with bottom surface 22 and exiting surface 23.

Shown in the 5th embodiment of Fig. 8, each micro-structural 24 is recessed in the surface of exiting surface 23 and is provided with, and the degree of depth that each micro-structural 24 is recessed into is cumulative towards other side by incidence surface 21, that is W1＜W2＜W3＜W4＜W5＜W6＜W7.

Shown in the 6th embodiment of Fig. 9, each micro-structural 24 protrudes from the setting of exiting surface 23, and the height that each micro-structural 24 is protruded is cumulative towards other side by incidence surface 21, that is H1＜H2＜H3＜H4＜H5＜H6＜H7.

Shown in the 7th embodiment of Figure 10, planar portions 25 by incidence surface towards 21 in addition side decrescence, that is P1＞P2＞P3＞P4＞P5＞P6＞P7.

As mentioned above, the utility model provides backlight module one preferable feasible light conducting plate structure, 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. LGP, this LGP have an incidence surface, one and this incidence surface bottom surface of intersecting, and an exiting surface relative with this bottom surface; It is characterized in that:

In this bottom surface and the exiting surface at least one side be provided with plural micro-structural, have asymmetrical first and second oblique angle between each micro-structural and surface, and between adjacent microstructures and be provided with a planar portions.

2. LGP according to claim 1 is characterized in that, each micro-structural is recessed or protrude from bottom surface or exiting surface setting.

3. as LGP as described in the claim 2, it is characterized in that the height of this planar portions is identical with bottom surface or exiting surface.

4. LGP according to claim 1 is characterized in that the bottom surface of this LGP and exiting surface are provided with plural micro-structural, and each micro-structural is recessed or protrude from the bottom surface and be provided with.

5. as LGP as described in the claim 4, it is characterized in that the height of this planar portions is identical with bottom surface and exiting surface.

6. LGP according to claim 1 is characterized in that the cross section of each micro-structural is triangular form or polygon.

7. LGP according to claim 1 is characterized in that, each micro-structural is recessed in the surface and is provided with, and the recessed degree of depth of each micro-structural is cumulative towards other side by incidence surface.

8. LGP according to claim 1 is characterized in that, each micro-structural protrudes from the surface and is provided with, and the height that each micro-structural is protruded is cumulative towards other side by incidence surface.

9. LGP according to claim 1 is characterized in that, the length of this planar portions by incidence surface towards other side decrescence.

10. LGP according to claim 1 is characterized in that the incidence surface of this LGP is provided with light source.