CN2594814Y

CN2594814Y - Light conducting panel

Info

Publication number: CN2594814Y
Application number: CN 02250850
Authority: CN
Inventors: 吕昌岳; 余泰成; 陈杰良
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2002-12-27
Filing date: 2002-12-27
Publication date: 2003-12-24
Anticipated expiration: 2012-12-27

Abstract

The utility model relates to a light conducting panel, which comprises a light incidence surface used for receiving beam, a light outgoing surface intersected with the light incidence surface, and a bottom surface which is opposite to the light outgoing surface, wherein, the bottom surface is provided with a plurality of scattering points and a groove of each scattering point is provided with a plurality of microlens. Because the microlens have the ability of strengthening each scattering point and changing the reflection angle of light, each scattering point has scattering function provided by the microlens and the effect of prism light-focusing inside.

Description

Light guide plate

[technical field]

The utility model is about a kind of light guide plate, especially about a kind of light guide plate with scattering point.

[background technology]

Because of panel of LCD itself is not had a characteristics of luminescence, need planar light source device provide uniform in-plane light, to obtain good visual effect for it.Key component is a light guide plate in the planar light source device, and the purposes of light guide plate is to convert pointolite or line source to area source.

The prior art planar light source device comprises light source and light guide plate, the incidence surface setting of the relative light guide plate of light source, and the transmission direction that this light-guide plate guides is sent light beam from light source converts line source or pointolite to the area source outgoing.

See also Fig. 1, a kind of some scattering points 107 of bottom surface 105 distributions of prior art light guide plate 10, in order to the total reflection condition of broken beam in light guide plate 10 internal transmission, and make the homogeneity of its scattering, and then promote the whole optical property of the planar light source device that uses light guide plate 10 with raising light guide plate 10 outgoing beams.The density of the site 107 of light guide plate 10, size all can have different designs to adapt to different pointolites or line source.In addition, the site 107 of light guide plate 10 only can be improved from light guide plate 10 outgoing uniformities of light, can't improve briliancy from light guide plate 10 emergent lights, for further promoting the briliancy of emergent light, the exit facet setting that additionally needs the contiguous light guide plate 10 of two pieces of prism plates (figure does not show) causes the high and assembling inconvenience of the planar light source device complex structure, the material cost that adopt light guide plate 10 to promote briliancy.

[utility model content]

For solving the lower technical matters of prior art light guide plate bright dipping briliancy, the utility model provides a kind of bright dipping briliancy higher light guide plate.

The technical scheme of the utility model technical solution problem provides a light guide plate, it comprise one in order to the incidence surface that receives light, one with the crossing light-emitting face of incidence surface and one and this light-emitting face opposed bottom surface.Wherein, this bottom surface is provided with some scattering points, and each scattering point has a groove, is provided with some lenticules in this groove.

Compared to prior art, the utility model purpose has following advantage: because of the bottom surface of the utility model light guide plate is provided with scattering point, and the groove of this scattering point is provided with some lenticules, causes light guide plate tool optically focused effect and bright dipping briliancy higher.

[description of drawings]

Fig. 1 is the floor map of prior art light guide plate.

Fig. 2 is the stereographic map of the utility model light guide plate.

Fig. 3 is the side view of light guide plate shown in Figure 2.

Fig. 4 is the scattering point distribution schematic diagram of light guide plate shown in Figure 2.

Fig. 5 is the stereographic map of the scattering point of the utility model light guide plate.

Fig. 6 is the vertical view of the scattering point of light guide plate shown in Figure 5.

Fig. 7 is the synoptic diagram of the scattering point of light guide plate shown in Figure 6 when not having lenticule.

Fig. 8 is the stereographic map of scattering point of the light guide plate of another embodiment of the utility model.

[embodiment]

See also Fig. 2, the utility model light guide plate 20 is roughly rectangular, and it adopts translucent materials such as acryl resin, polycarbonate resin, polyvinyl resin or glass to make usually.Light guide plate 20 comprise bottom surface that at least one incidence surface that is used to receive light 23, intersects with incidence surface 25, a light-emitting face 21 relative with bottom surface 25 and with two crossing opposite side faces 26 of incidence surface 23.For preventing that light from leaking and the raising reflectivity, two opposite side faces 26 of light guide plate 20 can be coated with reflectance coating or reflecting plate (figure does not show) is installed.

See also Fig. 3 and Fig. 4, the bottom surface 25 of light guide plate 20 is provided with some scattering points 27.Some scattering points 27 can be uniformly distributed in bottom surface 25, and its size and density also can increase gradually along the direction away from incidence surface 23.Light guide plate 20 can adopt the ejection formation manufacturing, and each scattering point 27 depends on the bottom surface 25 of light guide plate 20 when ejection formation.

Please consult Fig. 5 and Fig. 6 together, scattering point 27 is cubic, and it comprises a groove (indicating) and is arranged at the interior some lenticules 275 of groove.Groove further comprises recessed face 273.The height of scattering point 27 is controlled in 0.5 μ m between the 100 μ m, and 50 μ m are a preferred height.This groove is rectangular pyramid shape, and the degree of depth of this groove is less than or equal to the height of scattering point 27.Lenticule 275 is shaped as ball and the crossing cross section body of groove, and the radius-of-curvature in cross section is that 5 μ m are to 50 μ m.Because lenticule 275 can strengthen each scattering point 27 and change the ability of light reflection angle, then in each scattering point 27, just have the scattering process that is provided by lenticule 275, and the effect of prism optically focused.See also Fig. 7, angle theta and the big I of angle Φ equate also can not wait, and angle theta generally is controlled in 30 and spends between 60 degree, and 50 degree are a preferred angle.

Compare prior art, some scattering points 27 because bottom surface 25 of the utility model light guide plate 20 distributes, and the recessed face 273 of scattering point 27 is provided with some lenticules 275, but some lenticules 275 converging beams, thereby make that light guide plate 20 bright dipping briliancy are higher, and the certain homogeneity of tool.

See also Fig. 8, some scattering points 37 of the light guide plate of another embodiment of the utility model (figure does not show) are arranged at the bottom surface (figure does not show) of light guide plate.Scattering point 37 comprises that one is formed at the groove 373 in the surface 371 with the bottom surface facing surfaces 371, of light guide plate and is arranged at some lenticules 375 in the groove 373.The height of scattering point 37 is controlled in 0.5 μ m between the 100 μ m, and 50 μ m are a preferred height.This groove is rectangular pyramid shape, and the degree of depth of groove 373 is less than or equal to the height of scattering point 37.Lenticule 375 is shaped as the cross section body that ball and groove 373 intersects, and the radius-of-curvature in cross section is that 5 μ m are to 50 μ m.Because lenticule 375 can strengthen each scattering point 37 and change the ability of light reflection angle, then in each scattering point 37, just have the scattering process that is provided by lenticule 375, and the effect of prism optically focused.

The scattering point of the utility model light guide plate also can be cylindric, spherical or round table-like.The height of scattering point is controlled in 0.5 μ m between the 100 μ m, and 50 μ m are a preferred height.With respect to cylindric, spherical or round table-like scattering point, scattering point has a groove and is conical, and the degree of depth of this groove is less than or equal to the height of scattering point.Be provided with lenticule in the groove, microlens shape is the cross section body that ball and groove intersect, and the radius-of-curvature in cross section is that 5 μ m are to 50 μ m.Because lenticule can strengthen the ability that each scattering point changes the light reflection angle, then the scattering process that provides by lenticule just is provided in each scattering point, and the effect of prism optically focused.Light guide plate can adopt the ejection formation manufacturing, and each scattering point depends on the bottom surface of light guide plate when ejection formation.

Claims

1. light guide plate, it comprise one in order to the incidence surface that receives light, one with the crossing light-emitting face of incidence surface and one and this light-emitting face opposed bottom surface, this bottom surface is provided with some scattering points, it is characterized in that: each scattering point has a groove, is provided with some lenticules in this groove.

2. light guide plate according to claim 1 is characterized in that: each microlens shape is the cross section body that ball and groove intersect, and the radius-of-curvature in cross section is that 5 μ m are to 50 μ m.

3. light guide plate according to claim 2, wherein, the height of this scattering point is 0.5 μ m to 100 μ m, and the degree of depth of this groove is less than or equal to the height of this scattering point.

4. light guide plate according to claim 3 is characterized in that: each scattering point is cubic, and this groove is rectangular pyramid shape.

5. light guide plate according to claim 3 is characterized in that: each scattering point is cylindric, spherical or round table-like, and this groove is conical.

6. according to claim 4 or 5 described light guide plate, it is characterized in that: this scattering point is uniformly distributed in this bottom surface.

7. according to claim 4 or 5 described light guide plate, it is characterized in that: the size of this scattering point and density increase gradually along the direction away from this incidence surface.