CN201122185Y

CN201122185Y - Improved structure of light conducting plate

Info

Publication number: CN201122185Y
Application number: CNU2007203102318U
Authority: CN
Inventors: 张裕政
Original assignee: Taiwan Nano Electro Optical Technology Co Ltd
Current assignee: Da Yun Precision Industrial stock Co., Ltd
Priority date: 2007-12-05
Filing date: 2007-12-05
Publication date: 2008-09-24
Anticipated expiration: 2017-12-05

Abstract

The utility model relates to a structural improvement of a light guiding panel, which at least includes a light inputting surface, a bottom surface and a light outputting surface corresponding to the bottom surface, and a point light source is arranged at one side corresponding to the light inputting surface; wherein, the light outputting surface and the bottom surface are provided with a plurality of grooves, mesh points are arranged at the circumference of a plurality of grooves of the light outputting surface or/and the bottom surface, so that the ray of the point light source is reflected and scattered by the grooves and the mesh points, and the uniformity of the brightness of the emergent ray can be improved, and the HOT SPOT phenomena is reduced.

Description

The structural improvement of light guide plate

Technical field

The utility model relates to a kind of structure of light guide plate, aims to provide a kind ofly can effectively improve emergent ray briliancy homogeneity, and reduces firefly (HOT SPOT) phenomenon, particularly is used in the light conducting plate structure improvement of side-view light emitting device in the LCD.

Background technology

Press, 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 Figure 1, be the structure of general side light type back light module, mainly by pointolite 30, light guide plate 40, diffuser plate 31 and prism combination 32 are formed, this light guide plate 40 comprises an incidence surface 41, one bottom surface 42 of intersecting with this incidence surface 41, an and exiting surface 43 relative with this

bottom surface

42,30 of this pointolites are arranged at a side that should incidence surface 41, and the light that sends of acceptance point light source 30, the light reflection that its bottom surface 42 will import, scattering, formation is along the homodisperse scattered beam of all directions, this exiting surface 43 should be derived light guide plate 40 by homodisperse light, and the guiding display panels is to reach the effect that display panels shows.

Reflection, the scattering of these 42 pairs of light in bottom surface are penetrated by the site, please consult shown in Figure 2ly simultaneously, and there is the plural number site 44 of evenly arranging in bottom surface 42 branches of this light guide plate 40, and the light that its incidence surface 41 imports reflects, scattering.Only, the light that sends because of pointolite enters from the incidence surface 41 of light guide plate 40, so light guide plate 40 is luminous brighter near the part of pointolite 30, and the part of point of distance light source 30 is luminous darker, and firefly (HOT SPOT) phenomenon is arranged easily, so these site 43 designs can not provide uniform luminosity effectively.

The utility model content

In view of this, the technical matters that the utility model solved is to provide a kind of light that passes through that makes evenly to penetrate, and improves emergent ray briliancy homogeneity, and the light conducting plate structure improvement that reduces firefly (HOTSPOT) phenomenon.

The structure improved technical scheme of the utility model light guide plate is, this 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, and pointolite then is arranged at a side that should incidence surface; Wherein, this exiting surface and bottom surface are provided with a plurality of grooves, are provided with the site around a plurality of grooves of this exiting surface or bottom surface.

The beneficial effects of the utility model are: make reflection and the scattering of the light of pointolite via groove and site, can improve emergent ray briliancy homogeneity and reduce firefly (HOT SPOT) phenomenon.

Description of drawings

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

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

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

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

Fig. 5 A, B are the structural representation of light guide plate the 3rd embodiment in the utility model;

Fig. 6 A, B are the structural representation of light guide plate the 4th embodiment in the utility model.

[figure number explanation]

Pointolite 10 light guide plate 20

Incidence surface 21 bottom surfaces 22

Exiting surface 23 grooves 24

Site 25 pointolites 30

Diffuser plate 31 prisms combination 32

Light guide plate 40 incidence surfaces 41

Bottom surface 42 exiting surfaces 43

Site 44

Embodiment

For the clear structure of the present utility model of your auditor is formed, and the overall operation mode, cooperate graphic being described as follows now:

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, its structure is formed equally as shown in Figure 3, its light guide plate 20 plate ends are divided into incidence surface 21, its incidence surface 21 intersections are bottom surface 22, its front portion is an exiting surface 23, and pointolite 10 is arranged at a side that should incidence surface 21, its pointolite 10 can be light emitting diode, make light be able to inject from this incidence surface 21, exiting surface 23 by light guide plate 20 fronts penetrates again, to reach the effect that light source shows.

Focusing on of this case: this exiting surface 23 and bottom surface 22 are provided with a plurality of grooves 24, be provided with site 25 around a plurality of grooves 24 of this exiting surface 23 or bottom surface 22, among first embodiment as shown in the figure, around a plurality of grooves 24 of exiting surface 23, be provided with site 25, wherein, each groove 24 protrudes from the surface of exiting surface 23 and bottom surface 22, and a plurality of groove 24 is the arrangement of vertical point light source 10 directions, each groove 24 is the V-structure body, and is provided with in the mode of arranging that continues.

Among second embodiment as shown in Figure 4, be provided with site 25 in the bottom surface around a plurality of grooves 24 of 22, the form on surface is protruded in each site 25, wherein, the groove 24 of this exiting surface 23 protrudes from the surface of exiting surface 23, and the groove 24 of bottom surface 22 is recessed in the bottom surface 22 surface, and the groove 24 of this exiting surface 23 is the arrangement of parallel pointolite 10 directions, and the groove 24 on the bottom surface 22 is the arrangement of vertical point light source 10 directions, and each groove 24 is the V-structure body, and 24 of each grooves have constant spacing.

Among the 3rd embodiment shown in Fig. 5 A, in the bottom surface 22 and a plurality of grooves 24 of exiting surface 23 around be provided with site 25, the form on the 25 recessed surfaces, site of this bottom surface 22, the form on surface is protruded in the site 25 of this exiting surface 23, wherein, each groove 24 protrudes from the surface of bottom surface 22 and exiting surface 23, and the groove 24 of this exiting surface 23 is the arrangement of vertical point light source 10 directions, and the groove 24 on the bottom surface 22 is the arrangement of parallel pointolite 10 directions, each groove 24 is a U type structure, and 24 of each grooves have not equidistant spacing, and among the embodiment as shown in the figure, the spacing of each groove 24 is cumulative towards both sides by pointolite 10; Certainly also can be shown in Fig. 5 B, the spacing of each groove 24 is by pointolite 10 towards both sides decrescence.

Among the 4th embodiment as shown in Figure 6A, around a plurality of grooves 24 of exiting surface 23, be provided with site 25, wherein, each groove 24 protrudes from the surface of exiting surface 23 and bottom surface 22, and a plurality of grooves 24 are the arrangement of parallel pointolite 10 directions, each groove 24 is the V-structure body, and the mode of arranging to continue is provided with, and each site 25 for identical size periodic arrangement on groove 24; Certainly also can be shown in Fig. 6 B, each site 25 for different size periodic arrangement on groove 24, for example: the site 25 near pointolite 10 places is arranged comparatively intensive.

What deserves to be mentioned is that the design of the utility model groove and site makes reflection and the scattering of the light of pointolite via groove and site, can improve emergent ray briliancy homogeneity and reduce firefly (HOT SPOT) phenomenon.

As mentioned above, the utility model provides side light type back light module 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, a kind of structural improvement of 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 exiting surface and bottom surface are provided with a plurality of grooves, are provided with the site around a plurality of grooves of this exiting surface or bottom surface.

2, the structural improvement of light guide plate according to claim 1 is characterized in that, each groove protrudes or be recessed into the surface of exiting surface and bottom surface.

3, the structural improvement of light guide plate according to claim 1 is characterized in that each groove is V-type or U type structure.

4, the structural improvement of light guide plate according to claim 1 is characterized in that, each groove 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 or not equidistant spacing between each groove.

6, the structural improvement of light guide plate according to claim 1 is characterized in that, the spacing of each groove by pointolite towards both sides decrescence or cumulative.

7, the structural improvement of light guide plate according to claim 1 is characterized in that, protrude or the form on recessed surface each site.

8, the structural improvement of light guide plate according to claim 1 is characterized in that, each site is identical size or different size.

9, the structural improvement of light guide plate according to claim 1 is characterized in that, each site be periodic arrangement on groove, perhaps be that no periodic array is on groove.

10, the structural improvement of light guide plate according to claim 1 is characterized in that a plurality of grooves on this exiting surface and the bottom surface are the arrangement of vertical point light source direction; Perhaps a plurality of grooves on this exiting surface and the bottom surface are the arrangement of parallel pointolite direction; Perhaps a plurality of grooves of this exiting surface are the arrangement of parallel pointolite direction, and a plurality of grooves on the bottom surface are the arrangement of vertical point light source direction; Also or a plurality of grooves of this exiting surface be the arrangement of vertical point light source direction, and a plurality of grooves on the bottom surface are the arrangement of parallel pointolite direction.