CN200976054Y

CN200976054Y - Structural improvement of light guide plate

Info

Publication number: CN200976054Y
Application number: CN 200620156906
Authority: CN
Inventors: 陈树盛; 张俊彬; 张裕政
Original assignee: Taiwan Nano Electro Optical Technology Co Ltd
Current assignee: FUXIANG INDUSTRIAL Co Ltd
Priority date: 2006-10-18
Filing date: 2006-10-18
Publication date: 2007-11-14
Anticipated expiration: 2016-10-18

Abstract

The utility model discloses an improved structure of light guide plate, at least comprising a light incident surface, a bottom surface intersecting with the light incident surface, a light emergent surface opposite to the bottom surface, and a side surface intersecting with the bottom surface and the light emergent surface and corresponding to the light incident surface, wherein the light emergent surface is provided with a plurality of grooves, and a plurality of point light sources are arranged on one side corresponding to the light incident surface; the grooves extend into the surface of the light guide plate to form a depth, the distances or depths are arranged at different intervals and depths on the light incident surface, and the distances or depths on the side surfaces are arranged at the same interval or depth, so that the luminance uniformity of emergent light rays can be improved.

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, 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 11, light guide plate 12, plural number optics matrix 13 is formed, this light guide plate 12 comprises an incidence surface 121, one bottom surface 1 22 of intersecting with this incidence surface 121, one exiting surface 123 relative with this bottom surface 122, and one intersect and correspond to the side 124 of incidence surface 121 with bottom surface 122 and

exiting surface

123,11 of this pointolites are arranged at a side that should incidence surface 121, and the light that sends of acceptance point light source 11, the light reflection that its bottom surface 122 will import, scattering, formation is along the homodisperse scattered beam of all directions, this exiting surface 123 should be derived light guide plate 12 by homodisperse light, the guiding display panels is to reach the effect that display panels shows.

The exiting surface 123 of this light guide plate 12 is provided with plural V-groove 14, when pointolite 11 emits beam, can produce the effect of light in the exiting surface 123 of light guide plate under the refraction of groove 14; And this in twos 14 of grooves have a spacing P, please consult Fig. 2 and shown in Figure 3 simultaneously, and stretching into light guide plate 11 surfaces, each groove 14 is formed with a depth H, the light that sends because of pointolite 11 enters from the incidence surface 121 of light guide plate 12, so light guide plate 12 is luminous brighter near the part of pointolite 11, and the part of point of distance light source 11 is luminous darker, so the form of groove 14 can have different the variation, the spacing P of each groove 14 or depth H formula in gradient change, this pointolite 11 is right against has 14 settings of the maximum groove of spacing P (or degree of depth), so that it is comparatively even to penetrate the light of exiting surface 123.

Yet, each groove 14 extends to side 124 from the incidence surface 121 of light guide plate, so the spacing P of each groove 14 or depth H are in

incidence surface

121 and 124 places, side, all the groove 14 in corresponding pointolite 11 places has bigger spacing P or depth H, and this pointolite 11 is arranged at light guide plate incidence surface 121, so the light that light guide plate 12 point of distance light sources 11 (that is near side 124) place receives is identical, but identical light penetrates via different spacing P or depth H, it can form different briliancy performances, makes the emergent ray luminance nonuniformity even.

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 the inhomogeneity light conducting plate structure improvement of emergent ray briliancy.

The structure improved solution of the utility model light guide plate, be this light guide plate bottom surface of including an incidence surface, at least and intersecting with this incidence surface, an exiting surface relative with this bottom surface, and one intersect and correspond to the side of incidence surface with bottom surface and exiting surface, its exiting surface is provided with plural groove, and the complex points light source is arranged at a side that should incidence surface; Wherein, this has a spacing in twos between groove, be formed with a degree of depth and each groove stretches into the light guide plate surface, and each spacing or the degree of depth are the arrangement of the spacing inequality and the degree of depth in incidence surface, in the side then is that the uniform distances or the degree of depth are arranged, and it is even to improve the emergent ray briliancy.

The beneficial effects of the utility model are: can obtain a kind ofly can effectively improving emergent ray briliancy homogeneity, 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 the structural perspective of general backlight module;

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

Fig. 3 is a structural representation of commonly using light guide plate;

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

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

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

Fig. 7 A, B are the structural representation of light guide plate second embodiment in the utility model;

Fig. 8 is the structural perspective of light guide plate the 3rd embodiment in the utility model;

Fig. 9 A, B are the structural representation of light guide plate the 3rd embodiment in the utility model;

Figure 10 is the structural perspective of light guide plate the 4th embodiment in the utility model;

Figure 11 is the structural perspective of light guide plate the 5th embodiment in the utility model;

Figure 12 A, B are the structural representation of light guide plate the 5th embodiment in the utility model;

Figure 13 is the structural perspective of light guide plate the 6th embodiment in the utility model.

[figure number explanation]

11 pointolites, 12 light guide plate

121 incidence surfaces, 122 bottom surfaces

123 exiting surfaces, 124 sides

13 optics matrixs, 14 grooves

21 light guide plate, 211 light faces

212 bottom surfaces, 213 exiting surfaces

214 sides, 22 grooves

23 pointolites

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, among its light guide plate 21 structures first embodiment as shown in Figure 4, its light guide plate 21 includes an incidence surface 211 at least, one bottom surface 212 of intersecting with this incidence surface 211, one exiting surface 213 relative with this bottom surface 212, and one intersect and correspond to the side 214 of incidence surface 211 with bottom surface 212 and exiting surface 213, its exiting surface 213 is provided with plural groove 22, this groove 22 can be V-groove, and complex points light source 23 is arranged at a side that should incidence surface 211, its pointolite 23 can be light emitting diode, make light be able to inject from this incidence surface 211, and under the refraction of groove 22, exiting surface 213 by light guide plate 21 fronts penetrates again, to reach the effect that light source shows.

Focusing on of this case: this in twos 22 of grooves have a spacing P, each spacing P is not arrangement (shown in Fig. 5 A) equidistantly in incidence surface 211, the spacing P of each groove 22 formula in gradient changes, and pointolite 23 is right against groove 22 settings with spacing maximum, 214 is equidistant arrange (shown in Fig. 5 B) in the side, and making each groove 22 is curve with exiting surface 213 intersections.

During concrete the use, the light that this pointolite 23 sends enters from the incidence surface 211 of light guide plate 21, so light guide plate 21 is luminous brighter near the part of pointolite 23, and the part of point of distance light source 23 is luminous darker, but has bigger spacing P in corresponding to pointolite 23 places by each groove 22, and point of distance light source 23 places have less spacing P, so that it is comparatively even to penetrate exiting surface 213 light; And the light that light guide plate 21 point of distance light sources 23 (that is near side 214) place receives is identical, with light refraction, forming identical light briliancy, and then improves whole emergent ray briliancy homogeneity via each groove 22 of equidistant arrangement.

Among second embodiment as shown in Figure 6, this in twos 22 of grooves have a spacing P equally, each spacing P is not arrangement (shown in Fig. 7 A) equidistantly in incidence surface 211, the spacing P of each groove 22 formula in gradient changes, and pointolite 23 is right against groove 22 settings with spacing minimum, 22 of the grooves that two pointolites are 23 have bigger spacing P, 214 is equidistant arrange (shown in Fig. 7 B) in the side, making each groove 22 is curve with exiting surface 213 intersections, can improve whole emergent ray briliancy homogeneity equally.

Among the 3rd embodiment as shown in Figure 8, each groove 22 stretches into light guide plate 21 surfaces and is formed with a depth H, each depth H is arranged (shown in Fig. 9 A) in incidence surface 211 for different depth, the depth H of each groove 22 formula in gradient changes, and pointolite 23 is right against groove 22 settings with degree of depth maximum, 22 of the grooves that two pointolites are 23 have small depth H, and 214 is equidistant arrange (shown in Fig. 9 B) in the side; Certainly, also can the 4th embodiment as shown in figure 10 in, this pointolite 23 is right against the groove 22 with degree of depth minimum and is provided with, and can improve whole emergent ray briliancy homogeneity equally.

Among the 5th embodiment as shown in figure 11, this in twos 22 of grooves have a spacing P, and stretching into light guide plate 21 surfaces, each groove 22 is formed with a depth H, each spacing P and depth H are that the different spacing and the degree of depth are arranged (shown in Figure 12 A) in incidence surface 211, the spacing P of each groove 22 and depth H formula in gradient change, and pointolite 23 is right against groove 22 settings with spacing minimum and degree of depth maximum, 22 of the grooves that two pointolites are 23 have less spacing P and depth H, and 214 is that uniform distances P and depth H are arranged (shown in Figure 12 B) in the side; Certainly, also can the 6th embodiment as shown in figure 13 in, this pointolite 23 is right against the groove 22 with spacing maximum and degree of depth minimum and is provided with, and can improve whole emergent ray briliancy homogeneity equally.

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 structural improvement of a light guide plate, the light guide plate at least including a light incident surface, a bottom surface intersecting the light incident surface, a light exit surface opposite to the bottom surface, and a light exit surface intersecting and corresponding to the bottom surface and the light exit surface. On the side of the light-incident surface, a plurality of grooves are arranged on the light-emitting surface, and a plurality of point light sources are arranged on the side corresponding to the light-incidence surface; the features are as follows:

There is a distance between the two grooves, and each groove protrudes into the surface of the light guide plate to form a depth, and the distances and depths are different from each other, and the same distance or the same depth are arranged on the side.

2. The structural improvement of the light guide plate as claimed in claim 1, wherein the pitches are different from each other and the depths are different from each other, while the side faces are arranged at the same pitch and depth.

3. The structural improvement of the light guide plate according to claim 1, wherein the groove is a V-shaped groove.

4. The structural improvement of the light guide plate according to claim 1, wherein the distance between the grooves changes in a gradient manner, and the point light source is arranged directly opposite to the groove with the largest distance.

5. The structural improvement of the light guide plate according to claim 1, characterized in that the pitch of each groove changes in a gradient manner, and the point light source is arranged directly opposite to the groove with the smallest pitch.

6. The structural improvement of the light guide plate according to claim 1, wherein the intersection of each groove and the light emitting surface is a curved line.

7. The structural improvement of the light guide plate according to claim 1, characterized in that the depth of each groove changes in a gradient manner, and the point light source is arranged directly facing the groove with the largest depth.

8. The structural improvement of the light guide plate according to claim 1, characterized in that the depth of each groove changes in a gradient manner, and the point light source is set directly opposite to the groove with the smallest depth.