CN201035177Y

CN201035177Y - Structural improvement of light guide plate

Info

Publication number: CN201035177Y
Application number: CNU200720001143XU
Authority: CN
Inventors: 陈树盛; 张俊彬; 曾业勋
Original assignee: Taiwan Nano Electro Optical Technology Co Ltd
Current assignee: FUXIANG INDUSTRIAL Co Ltd
Priority date: 2007-01-19
Filing date: 2007-01-19
Publication date: 2008-03-12
Anticipated expiration: 2017-01-19

Abstract

The light guide plate of the utility model at least comprises a light incident surface, a bottom surface intersected with the light incident surface and a light emergent surface opposite to the bottom surface, and the point light source is arranged at one side corresponding to the light incident surface; one side of the light incident surface is provided with a plurality of arc-shaped dimming components or cutting grooves which can damage the light advancing path, so that the passing light can be uniformly emitted, the brightness uniformity of the emergent light is improved, and the problem of uneven brightness of the backlight module in the prior art is effectively solved.

Description

The structural improvement of light guide plate

Technical field

The utility model relates to a kind of light conducting plate structure improvement, aims to provide a kind of the improvement and practises the problem that the bright dark inequality of backlight module is arranged, and particularly is used in the light conducting plate structure improvement of side-view light emitting device in the LCD.

Background technology

Generally be applied in the LCD of massaging device, can be according to the demand of actual design, and select to utilize the backlight module framework of straight-down negative or side-light type; As shown in Figures 1 and 2, be No. the 01112454th, TaiWan, China disclosed TaiWan, China patented claim in 21 days November calendar year 2001, be the basic structure synoptic diagram of a side light type back light module framework, these light guide plate 30 plate ends are divided into incidence surface 31, its front portion is an exiting surface 32, and the light of light source 20 is able to inject from this incidence surface 31, and the exiting surface 32 by light guide plate 30 fronts penetrates again, to reach the effect that light source shows.

Wherein, this light source 20 has two illuminating parts 22, in this illuminating part 22 light emitting diode 21 is set, and the incidence surface 31 of this light guide plate 30 is relative with light source 20, and with illuminating part 22 over against the zone some groovings 40 that are the triangle taper are set, each grooving 40 is divided into two groups and forms two light diffusion parts 41.

Light that autoluminescence diode 21 sends goes into to be provided with in the light guide plate 30 through the light area 311 relative with illuminating part 22, because the grooving 40 of triangle taper has two faces with respect to incidence surface 31 inclinations, therefore, the light that is incident to light diffusion part 41 at a certain angle will be entered in the light guide plate 30 after the diffusion, thus the homogeneity of bright dipping briliancy on the exiting surface 32 of raising light guide plate 30.

Yet, because light emitting diode 21 is a pointolite, its light that sends has certain dispersion angle, and the incident angle of light that is incident to different groovings 40 is also inequality, each grooving 40 on this incidence surface 31 designs in invariable mode, does not obviously take into full account its different diffusions to different incidence angles degree light, therefore, though this light guide plate can realize to a certain degree bright dipping briliancy homogenising by grooving 40, but still dislike not enough.

The utility model content

In view of this, the purpose of this utility model is to provide a kind of light that passes through that makes evenly to penetrate, and improves emergent ray briliancy homogeneity, practises the light conducting plate structure improvement that the bright dark inequality of backlight module is arranged and effectively improve.

The structure improved solution of the utility model light guide plate, this light guide plate include an incidence surface, one and this incidence surface bottom surface of intersecting at least, and an exiting surface relative with this bottom surface, and pointolite then is arranged at a side that should incidence surface; Wherein, a side of this incidence surface is provided with several arcuation dimming components that can destroy the light travel path, and the radian of each arcuation dimming components or diameter formula variation in gradient, and pointolite is right against the arcuation dimming components setting with maximum or minimum curvature or diameter.

Structure improved another solution of the utility model light guide plate, this light guide plate include an incidence surface, one and this incidence surface bottom surface of intersecting at least, and an exiting surface relative with this bottom surface, and pointolite then is arranged at a side that should incidence surface; Wherein, a side of this incidence surface is provided with the grooving that several can destroy the light travel path, has spacing between each grooving, and the width of each grooving or degree of depth formula variation in gradient, and pointolite is right against the grooving setting with maximum or minimum widith or degree of depth.

A structure improved solution again of the utility model light guide plate, this light guide plate include an incidence surface, one and this incidence surface bottom surface of intersecting at least, and an exiting surface relative with this bottom surface, and pointolite then is arranged at a side that should incidence surface; Wherein, a side of this incidence surface is provided with the grooving that several can destroy the light travel path, and each grooving has towards first and second hypotenuse that tilts of direction in opposite directions, and first and second angle of first and second hypotenuse and incidence surface formation different angles.

The beneficial effects of the utility model are: can obtain a kind of the improvement and practise the problem that the bright dark inequality of backlight module is arranged, particularly be used in the light conducting plate structure improvement of side-view light emitting device in the LCD.

Description of drawings

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

Fig. 2 is a structural representation of commonly using light guide plate;

Fig. 3 is the structural perspective of light guide plate first embodiment in the utility model;

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

Fig. 4 B is the structural representation of light guide plate second embodiment in the utility model;

Fig. 5 is the structural representation of light guide plate the 3rd embodiment in the utility model;

Fig. 6 is the structural representation of light guide plate the 4th embodiment in the utility model;

Fig. 7 is the structural perspective of light guide plate the 5th embodiment in the utility model;

Fig. 8 is the structural representation of light guide plate the 6th embodiment in the utility model;

Fig. 9 is the structural perspective of light guide plate the 7th embodiment in the utility model;

Figure 10 A is the structural representation of Fig. 9;

Figure 10 B is the structural representation of light guide plate the 8th embodiment in the utility model;

Figure 11 is the structural representation of light guide plate the 9th embodiment in the utility model;

Figure 12 is the structural perspective of light guide plate the tenth embodiment in the utility model;

Figure 13 is the structural representation of Figure 12;

Figure 14 is the structural representation of light guide plate the 11 embodiment in the utility model;

Figure 15 is the structural representation of light guide plate the 12 embodiment in the utility model;

Figure 16 is the structural representation of light guide plate the 13 embodiment in the utility model.

[figure number explanation]

20---light source 40---grooving

20 '---pointolite 41---light diffusion part

21---light emitting diodes 42---, first hypotenuse

22---illuminating parts 43---, second hypotenuse

30---light guide plate 421---, first angle

31---incidence surfaces 431---, second angle

311---light area 50---arcuation dimming components

32---exiting surface

Embodiment

The structural improvement of the utility model light guide plate, be primarily aimed at that light guide plate is improved in the side light type back light module framework, shown in Fig. 3 and Fig. 4 A, its light guide plate 30 plate ends are divided into incidence surface 31, and its front portion is an exiting surface 32, and pointolite 20 ' is arranged at a side that should incidence surface 31, its pointolite 20 ' can be light emitting diode, make light be able to inject from this incidence surface 31, the exiting surface 32 by light guide plate 30 fronts penetrates again, to reach the effect that light source shows.

Focusing on of this case: this incidence surface 31 is provided with several arcuation dimming components 50, as shown in the figure, the surface that each arcuation dimming components 50 protrudes incidence surfaces 31, and and and the radian of each arcuation dimming components 50 or Zhi Jing ﹠amp are set in the mode of arranging that continues; Formula changes in gradient, and this pointolite 20 ' is right against has maximum radian or Zhi Jing ﹠amp; Arcuation dimming components 50 Yi Ji ﹠amp is set;＞﹠amp; 1＞﹠amp; 2, and Zhi Jing ﹠amp; From with pointolite 20 ' over against incidence surface 31 places reduce gradually to both sides, also can make or pointolite 20 ' is right against and has minimum curvature or Zhi Jing ﹠amp; Arcuation dimming components 50 be provided with, shown in Fig. 4 B, Yi Ji ﹠amp;＜﹠amp; 1＜﹠amp; 2, make the divergence characterization of pointolite 20 ' self light cooperate each arcuation dimming components 50 Zhi Jing ﹠amp; Variation, and then make light guide plate end angular zone receive more light, and improve the whole homogeneity of exit facet bright dipping briliancy, practise the problem that the bright dark inequality of backlight module is arranged with effective improvement; And each arcuation dimming components 50 also can be the surface setting of recessed incidence surface, as shown in Figure 5; No matter, each arcuation dimming components 50 is provided with for the surface of protruding incidence surface 31 or recessed incidence surface 31, its arrangement mode can be provided with (as Fig. 3, Fig. 4 and shown in Figure 5) for the mode of arranging that continues, perhaps 50 of each arcuation dimming components have spacing P, its spacing P can be immobilize (as Figure 6 and Figure 7), also formula changes (as shown in Figure 8) in gradient, and pointolite 20 ' is right against arcuation dimming components 50 settings with spacing P maximum.

Shown in Fig. 9 and Figure 10 A, be second embodiment of the present utility model, this incidence surface 31 is provided with

several groovings

40,40 of each groovings have spacing P, the light oblique incidence that receives because of the grooving 40 of point of distance light source 20 ', when these grooving 40 depth D are dark, its bottom is difficult to receive light, so the depth D of each grooving 40 from pointolite 20 ' over against incidence surface 31 places reduce gradually to two sides, and the width W of each grooving 40 also from pointolite 20 ' over against incidence surface 31 places reduce gradually to two sides, that is pointolite 20 ' is right against the grooving setting with breadth extreme W or depth D, shown in Figure 10 B; Certainly, its pointolite also can be right against the grooving setting with minimum widith or degree of depth, to improve the homogeneity of emergent ray briliancy; And the spacing P of each grooving 40 can be and immobilizes, or formula changes in gradient, and as shown in figure 11, and pointolite 20 ' is right against the grooving 40 with spacing P maximum and is provided with.

As Figure 12 and shown in Figure 13, be the 3rd embodiment of the present utility model, this incidence surface 31 is provided with several groovings 40, each grooving 40 has towards direction inclination first in opposite directions, two

hypotenuses

42,43, and first, two

hypotenuses

42,43 form first of different angles with incidence surface 31, two angles 421,431, it is first years old, two angles 421,431 formula variations in gradient, and pointolite 20 ' is right against and has first angle, 421 minimums, and the grooving 40 of second angle, 431 maximums is provided with, also can be as shown in figure 14, this pointolite 20 ' is right against has first angle, 421 maximums, and the grooving 40 of second angle, 431 minimums is provided with.

No matter which kind of gradient type first and second angle 421,431 presents changes, the arrangement mode of each grooving 40 can continue to arrange and be provided with, as Figure 12 and shown in Figure 13; Certainly, 40 of each groovings also can have spacing P, and its spacing P can immobilize, and as shown in figure 15, also formula changes in gradient, and as shown in figure 16, and pointolite 20 ' is right against grooving 40 settings with spacing P maximum.

What deserves to be mentioned is, above each embodiment of the utility model, it all forms several on the incidence surface of light guide plate can destroy the light modulation structure body (including: arcuation dimming components, grooving) in light conduct path, but each light modulation structure body is not to design in invariable mode, no matter be the variation that radian, diameter or width, the degree of depth or spacing, angle all have gradient type, effectively to adjust the darker or brighter zone of light source according to Different Light, to improve emergent ray briliancy homogeneity.

As mentioned above, the utility model provides the side light type back light module frame another 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. the structural improvement of a light guide plate, its light guide plate include an incidence surface, one and this incidence surface bottom surface of intersecting at least, and an exiting surface relative with this bottom surface, and pointolite is arranged at a side that should incidence surface; It is characterized in that:

This incidence surface is provided with several arcuation dimming components, and the radian of each arcuation dimming components or diameter formula variation in gradient, and pointolite is right against the arcuation dimming components setting with maximum or minimum curvature or diameter.

2. the structural improvement of light guide plate according to claim 1 is characterized in that, each arcuation dimming components protrudes the surface of incidence surface.

3. the structural improvement of light guide plate according to claim 1 is characterized in that, the surface of the recessed incidence surface of each arcuation dimming components.

4. the structural improvement of light guide plate according to claim 1 is characterized in that, each arcuation dimming components is provided with in the mode of arranging that continues.

5. the structural improvement of light guide plate according to claim 1 is characterized in that having constant spacing between each arcuation dimming components.

6. as the structural improvement of light guide plate as described in the claim 5, it is characterized in that the spacing of each arcuation dimming components formula in gradient changes, and pointolite is right against the arcuation dimming components setting with spacing maximum.

7. the structural improvement of a light guide plate, its light guide plate include an incidence surface, one and this incidence surface bottom surface of intersecting at least, and an exiting surface relative with this bottom surface, and pointolite then is arranged at a side that should incidence surface; It is characterized in that:

This incidence surface is provided with several groovings, has spacing between each grooving, and the width of each grooving or degree of depth formula variation in gradient, and pointolite is right against the grooving setting with maximum or minimum widith or degree of depth.

8. as the structural improvement of light guide plate as described in the claim 7, it is characterized in that each grooving has towards first and second hypotenuse that tilts of direction in opposite directions, and first and second angle of first and second hypotenuse and incidence surface formation different angles.

9. as the structural improvement of light guide plate as described in the claim 7, it is characterized in that each grooving has towards first and second hypotenuse that tilts of direction in opposite directions, and first and second angle of first and second hypotenuse and incidence surface formation equal angular.

10. as the structural improvement of light guide plate as described in the claim 7, it is characterized in that the spacing of each grooving formula in gradient changes, and pointolite is right against the grooving setting with spacing maximum.

11. the structural improvement of a light guide plate, its light guide plate include an incidence surface, one and this incidence surface bottom surface of intersecting at least, and an exiting surface relative with this bottom surface, pointolite then is arranged at a side that should incidence surface; It is characterized in that:

This incidence surface is provided with several groovings, and each grooving has towards first and second hypotenuse that tilts of direction in opposite directions, and first and second angle of first and second hypotenuse and incidence surface formation different angles.

12. the structural improvement as light guide plate as described in the claim 11 is characterized in that, first and second angle of each grooving formula in gradient changes, and pointolite is right against and has the first angle maximum and the grooving setting of the second angle minimum.

13. the structural improvement as light guide plate as described in the claim 11 is characterized in that, first and second angle of each grooving formula in gradient changes, and pointolite is right against and has the first angle minimum and the grooving setting of the second angle maximum.

14. the structural improvement as light guide plate as described in the claim 11 is characterized in that, each grooving is provided with in the mode of arranging that continues.

15. the structural improvement as light guide plate as described in the claim 11 is characterized in that having spacing between each grooving.

16. the structural improvement as light guide plate as described in the claim 15 is characterized in that, the spacing of each grooving formula in gradient changes, and pointolite is right against the grooving setting with spacing maximum.

17. the structural improvement as light guide plate as described in the claim 1,7 or 11 is characterized in that this pointolite is a light emitting diode.