CN201035178Y

CN201035178Y - Improved structure of light conducting plate

Info

Publication number: CN201035178Y
Application number: CNU2007200011444U
Authority: CN
Inventors: 陈树盛; 张俊彬
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 includes at least a light entering surface, a bottom surface intersected with the light entering surface, a light exiting surface opposite to the light entering surface, and a point light source positioned on one side corresponding to the light entering surface. Wherein, at least one surface of the light exiting surface and the bottom surface is provided with a plurality of dimming structures, and deputy dots are arranged around the dimming structures, which makes the light of the point light source reflected and scattered by the dimming structures and deputy dots to improve the luminance uniformity of the outgoing light and the taste of the light.

Description

The light conducting plate structure improvement

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 the taste that increases light, 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 Figure 1, be the structure of general side light type back light module, mainly by pointolite 10, light guide plate 20, diffuser plate 30 and prism combination 400 are formed, this light guide plate 20 comprises an incidence surface 21, one bottom surface 22 of intersecting with this incidence surface 21, an and exiting surface 23 relative with this

bottom surface

22,10 of this pointolites are arranged at a side that should incidence surface 21, and the light that sends of acceptance point light source 10, the light reflection that its bottom surface 22 will import, scattering, formation is along the homodisperse scattered beam of all directions, this exiting surface 23 should be derived light guide plate 20 by homodisperse light, and the guiding display panels is to reach the effect that display panels shows.

Reflection, the scattering of these 22 pairs of light in bottom surface are penetrated by the site, please consult shown in Figure 2ly simultaneously, and there are some sites of evenly arranging 221 in bottom surface 22 branches of this light guide plate 20, and the light that its incidence surface 21 imports reflects, scattering.Yet the light that sends because of pointolite enters from the incidence surface 21 of light guide plate 20, so light guide plate 20 is luminous brighter near the part of pointolite 10, and the part of point of distance light source 10 is luminous darker, so these site 221 designs can not provide uniform luminosity effectively.

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, and the light conducting plate structure improvement that increases the taste of light.

The solution of the utility model light conducting plate structure improvement, this light guide plate include at least an incidence surface, one with the crossing bottom surface of this incidence surface, an and exiting surface relative with this bottom surface, pointolite then are arranged at a side that should incidence surface; Wherein, appoint one or both sides to be provided with several light modulation structures in this exiting surface or the bottom surface, and be provided with secondary site around several light modulation structures.

The beneficial effects of the utility model are: make reflection and the scattering of the light of pointolite via light modulation structure and secondary site, the taste that can improve emergent ray briliancy homogeneity and light.

Description of drawings

Fig. 1 is the structural representation of general 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 is the structural representation of light guide plate second embodiment in the utility model;

Fig. 5 is the structure for amplifying stereographic map of light modulation structure and secondary site in the utility model;

Fig. 6 is the structural representation of light modulation structure and secondary site the 3rd embodiment in the utility model;

Fig. 7 is the structural representation of light modulation structure and secondary site the 4th embodiment in the utility model;

Fig. 8 is the structural representation of light modulation structure and secondary site the 5th embodiment in the utility model;

Fig. 9 is the structural representation of light modulation structure and secondary site the 6th embodiment in the utility model.

[figure number explanation]

10 pointolites, 20 light guide plate

21 incidence surfaces, 22 bottom surfaces

221 sites, 23 exiting surfaces

The combination of 30 diffuser plates, 40 prisms

51 light modulation structures, 511 first hypotenuses

512 second hypotenuses, 513 first angles

514 second angles, 52 secondary sites

Embodiment

The improvement of the utility model light conducting plate structure, 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 1, 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: appoint one or both sides to be provided with several light modulation structures in this bottom surface or the exiting surface, please consult shown in Figure 3 simultaneously, it is that exiting surface 23 in light guide plate 20 is provided with some by the light modulation structures that grooving constituted 51 that protrude exiting surface 23 surfaces, and each light modulation structure 51 and the mode of arranging to continue are provided with, also can be as shown in Figure 4, be provided with some light modulation structures 51 that constituted by the arc structure body on recessed 22 surfaces, bottom surface in the bottom surface 22 of light guide plate 20, and several light modulation structures 51 are provided with secondary site 52 on every side, the structure of each secondary site 52 as shown in Figure 5, for protruding or recessed surperficial form, can utilize the moulding of sandblast mode and wherein protrude surperficial secondary site 52.

The light of this pointolite 10 is able to inject from this incidence surface 21, light reflection, scattering that its bottom surface 22 will import, formation is along the homodisperse scattered beam of all directions, the light modulation structure 51 and the secondary site 52 that are provided with on its bottom surface 22 can evenly be dispersed to exiting surface 23 with light, perhaps should derive light guide plate 20 by homodisperse light by light modulation structure 51 that is provided with on the exiting surface 23 and secondary site 52, the light that passes through is evenly penetrated, and improve emergent ray briliancy homogeneity, and the taste that increases light.

Certainly, the form of each light modulation structure 51 can be as following different embodiment, as shown in Figure 6, each light modulation structure 51 has towards first and second hypotenuse 511,512 that tilts of direction in opposite directions, and first and second hypotenuse 511,512 and bottom surface or exiting surface form first and second angle 513,514 of different angles, also can be as shown in Figure 7, and first and second angle 513,514 is an equal angular, and first and second hypotenuse 511,512 intersections also can form an arc limit, as shown in Figure 8; Moreover each light modulation structure 51 also can be the form of site, and as shown in Figure 9, and the diameter of this site is greater than the diameter of secondary site 52, and alternatively is provided with in each site periphery.

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 found purpose and in please claim within.

Claims

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

Appoint one or both sides to be provided with several light modulation structures in this exiting surface or the bottom surface, and be provided with secondary site around several light modulation structures.

2. light conducting plate structure improvement according to claim 1 is characterized in that, each light modulation structure protrudes or be recessed into the surface of an one or both sides in exiting surface or the bottom surface.

3. light conducting plate structure improvement according to claim 1 is characterized in that each light modulation structure is the arc structure body.

4. light conducting plate structure improvement according to claim 1 is characterized in that, each light modulation structure is provided with in the mode of arranging that continues.

5. light conducting plate structure improvement according to claim 1 is characterized in that having constant spacing between each light modulation structure.

6. light conducting plate structure improvement according to claim 1 is characterized in that each light modulation structure is the form of grooving, and has towards first and second hypotenuse that tilts of direction in opposite directions.

7. as light conducting plate structure improvement as described in the claim 6, it is characterized in that this first and second hypotenuse and incidence surface form first and second angle.

8. as light conducting plate structure improvement as described in the claim 6, it is characterized in that this first and second hypotenuse intersection is an arc.

9. light conducting plate structure improvement according to claim 1 it is characterized in that each light modulation structure is the form of site, and the diameter of this site is greater than the diameter of secondary site.

10. light conducting plate structure improvement according to claim 1 is characterized in that, protrude or recessed surperficial form each secondary site.