CN1967341A - Light conducting board - Google Patents
Light conducting board Download PDFInfo
- Publication number
- CN1967341A CN1967341A CN 200510101560 CN200510101560A CN1967341A CN 1967341 A CN1967341 A CN 1967341A CN 200510101560 CN200510101560 CN 200510101560 CN 200510101560 A CN200510101560 A CN 200510101560A CN 1967341 A CN1967341 A CN 1967341A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light guide
- lug
- light
- nib
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention relates to an illuminator including an entry surface, an emitting surface and a bottom surface correspond to the emitting surface. Among them, the emitting surface is equipped with a number of prism groups parallel to the entry surface and a number of prism groups vertical to the entry surface. They are staggered distributed. Each prism groups has a number of prisms. Prism groups parallel to the entry surface make light converges in the transverse direction of entry surface extension. Prism groups vertical to the entry surface make light converges in the direction of entry surface extension. Therefore, the illuminator can make light converge in all direction, and make the incident light perpendicular to the LCD.
Description
[technical field]
The present invention relates to a kind of light guide plate, particularly a kind of can be with the comprehensive convergence of light and vertical incidence to the light guide plate of LCD.
[background technology]
Because the liquid crystal of panel of LCD itself is not had a characteristics of luminescence, thereby, for reaching display effect, need to give the LCD panel that one planar light source device is provided, as back light system, its role is to area source abundant to panel of LCD supply brightness and that be evenly distributed.
The back light system of prior art mainly is made up of light source, light guide plate, reflecting plate, diffuser plate and prism plate.This light source can be arranged at light guide plate one side or two opposite sides and with light emission to this light guide plate.The effect of this light guide plate is the transmission direction of direct light line, make light by the even outgoing of the exiting surface of light guide plate, the reflecting plate bottom surface of this light guide plate relatively is provided with, and being reflected into once more by the light of bottom surface of light guide plate outgoing in this light guide plate, improves the utilization factor of light.Diffuser plate sets gradually with the exiting surface of the relative light guide plate of prism plate, so that more even by the distribution of light of light guide plate outgoing, and then the brightness and the homogeneity of raising panel of LCD.
See also Fig. 1 and Fig. 2, Fig. 1 is the elevational schematic view of prior art light guide plate, and Fig. 2 is the front view of the prior art light guide plate.This light guide plate 1 comprise an incidence surface 10, one and the exiting surface 11 that intersects of this incidence surface 10 and with these exiting surface 11 opposed bottom surface 12.For increasing the light extraction efficiency and the homogeneity of light guide plate 1, in the 12 configuration sites 120, bottom surface of light guide plate 1, the spacing that this site 120 distributes on the bottom surface 12 of light guide plate 1 has different designs with big I.When light transmission during to this site 120, light changes its reflection angle, promptly destroys the total reflection phenomenon that light transmits, and reflection and scattering will take place light, and to each different directions transmission, finally by exiting surface 11 ejaculations of this light guide plate 1.So, the light guide plate 1 of this kind structure can't converge on light on the direction vertical with exiting surface 11, promptly by the light of exiting surface 11 outgoing of light guide plate 1 can not vertical incidence to LCD.
See also Fig. 3 and Fig. 4, Fig. 3 is the schematic top plan view of the another kind of light guide plate of prior art, and Fig. 4 is the front view of the prior art light guide plate.This light guide plate 2 comprise an incidence surface 20, one and the exiting surface 21 that intersects of this incidence surface 20 and with these exiting surface 21 opposed bottom surface 22.For increasing the light extraction efficiency and the homogeneity of light guide plate 2, on the exiting surface 21 of this light guide plate 2, V-type groove 210 is set, the spacing that this V-type groove 210 distributes on the exiting surface 21 of light guide plate 2 has different designs with big I.When light transmission during to V-type groove 210, light changes its reflection angle, promptly destroys the total reflection phenomenon that light transmits, and reflection and scattering will take place light, and to each different directions transmission, finally by exiting surface 21 ejaculations of light guide plate 2.So, the light guide plate 2 of this kind structure can only be carried out light the angle convergence on the left and right directions of the bearing of trend of V-type groove 210, be about to light and converge on the XOZ plane near on the direction of Z axle, light can not be carried out the angle convergence on the bearing of trend of V-type groove 210, promptly light can not be converged on the YOZ plane near on the direction of Z axle.Therefore, still part can not be converged on the direction vertical with exiting surface 21 by the light of exiting surface 21 outgoing of light guide plate 2, promptly can not make most of light vertical incidence to LCD.
Because the light guide plate of above-mentioned two kinds of structures can not converge on the direction vertical with exiting surface light is comprehensive, promptly can not make the light vertical incidence to LCD, therefore can not satisfy the requirement of use.
[summary of the invention]
In view of this, providing a kind of can converge on the direction vertical with exiting surface light is comprehensive, can make the light vertical incidence firm and hard for essential to the leaded light of LCD.
A kind of light guide plate, it comprises incidence surface, one and the exiting surface that intersects of this incidence surface and one and this exiting surface opposed bottom surface; Wherein, this exiting surface is provided with some lug, nib group and some lug, nib groups perpendicular to this incidence surface that are parallel to this incidence surface, and the lug, nib group that is parallel to this incidence surface is interspersed with lug, nib group perpendicular to this incidence surface, and each lug, nib group has some lug, nibs.
Compared with prior art, owing to interlacedly on the described light guide plate exiting surface be provided with two kinds of lug, nib groups, the lug, nib group that wherein is parallel to the light guide plate incidence surface restrains light on the left and right directions of the bearing of trend of light guide plate incidence surface, lug, nib group perpendicular to the light guide plate incidence surface restrains light on the bearing of trend of light guide plate incidence surface, therefore, this light guide plate can converge on the direction vertical with exiting surface light is comprehensive, can make the light vertical incidence to LCD.
[description of drawings]
Fig. 1 is the elevational schematic view of prior art light guide plate.
Fig. 2 is that the master of light guide plate shown in Figure 1 looks synoptic diagram.
Fig. 3 is the schematic top plan view of the another kind of light guide plate of prior art.
Fig. 4 is that the master of light guide plate shown in Figure 3 looks synoptic diagram.
Fig. 5 is the schematic top plan view of first embodiment of the invention light guide plate.
Fig. 6 is that the master of first embodiment of the invention light guide plate looks synoptic diagram.
Fig. 7 is the schematic side view of first embodiment of the invention light guide plate.
Fig. 8 is that the master of second embodiment of the invention light guide plate looks synoptic diagram.
Fig. 9 is the schematic top plan view of third embodiment of the invention light guide plate.
[embodiment]
Below in conjunction with accompanying drawing the present invention is described in further detail.
See also Fig. 5, Fig. 6 and Fig. 7, first embodiment of the invention light guide plate 3 is plate light guide plate, its material is a transparent resin material, for example: polymethylmethacrylate or polycarbonate etc.This light guide plate 3 has two incidence surfaces 30, and reaches and these exiting surface 31 opposed bottom surface 32 with the exiting surface 31 that this incidence surface 30 intersects.The bottom surface 32 of this light guide plate 3 is the plane.The exiting surface 31 of this light guide plate 3 is provided with some lug, nib group 310 and some lug, nib groups 311 perpendicular to this incidence surface 30 that are parallel to this incidence surface 30, these two kinds of lug, nib groups 310 and 311 areas in exiting surface 31 equate, be parallel to the lug, nib group 310 of this incidence surface 30 and be interspersed, and do not contact between these two kinds of lug, nib groups 310 and 311 and have at interval perpendicular to the lug, nib group 311 of this incidence surface 30.The lug, nib group 310 that is parallel to incidence surface 30 comprises some continuous lug, nibs 3100, and the drift angle of this lug, nib 3100 is a wedge angle.Lug, nib group 311 perpendicular to incidence surface 30 comprises some continuous lug, nibs 3110, and the drift angle of this lug, nib 3110 also is a wedge angle.
When the light of light source is incident on the exiting surface 31 of light guide plate 3, lug, nib 3100 and 3110 by lug, nib group 310 on this exiting surface 31 and lug, nib group 311 changes shooting angle, promptly destroy the total reflection phenomenon that light transmits, and to each different directions transmission, in the time of on transferring to perpendicular to the side 31100 of the lug, nib 3110 of incidence surface 30, refraction effect takes place through this side 31100 in most of light, the angle of the light after the refraction and exiting surface 31 vertical direction is littler than light and the angle of exiting surface 31 vertical direction of this light after the surface level refraction, therefore claim this light on the bearing of trend of light guide plate 3 incidence surfaces 30, to restrain, be about to light and converge on the XOZ plane near on the direction of Z axle; When on the side 31000 that transfers to the lug, nib 3100 that is parallel to incidence surface 30, refraction effect takes place through this side 31000 in most of light, the angle of the light after the refraction and exiting surface 31 vertical direction is littler than light and the angle of exiting surface 31 vertical direction of this light after the surface level refraction, therefore claim this light on the left and right directions of the bearing of trend of light guide plate 3 incidence surfaces 30, to restrain, be about to light and converge on the YOZ plane near on the direction of Z axle.Each lug, nib group is minimum in exiting surface 30 area occupied of light guide plate 3 again, and lug, nib group 310 and 311 exiting surfaces 31 in light guide plate 3 are interspersed, therefore, can claim this light guide plate 3 to converge on the direction vertical light is comprehensive with exiting surface 31, as a whole, the light near vertical is in exiting surface 31 outgoing of light guide plate 3, and vertical incidence is to LCD, thus the satisfied requirement of using.
Along with incidence surface 30 away from light guide plate 3, because away from light source, so emitting brightness is more and more lower, cause the emitting brightness of whole light guide plate 3 inhomogeneous, so along with the incidence surface 30 away from light guide plate 3, the lug, nib on light guide plate 3 exiting surfaces 31 distributes more and more closeer, and light is increased by this lug, nib exit dose, increase this regional emitting brightness, closely improve the homogeneity of the emitting brightness of whole light guide plate 3.
Be appreciated that ground, this light guide plate 3 also can be wedge type or other shape, its incidence surface 30 can be a face or a plurality of, two kinds of lug, nib groups 310 and 311 areas in exiting surface 31 can not wait yet, can not intersect mutually at interval between these two kinds of lug, nib groups 310 and 311 yet, can have discontinuously arranged at interval between its each lug, nib 3100 and each lug, nib 3110 yet.
See also Fig. 8, the light guide plate of second embodiment of the invention light guide plate 3 ' its structure and a last embodiment is roughly the same, and the drift angle that is the lug, nib of its lug, nib group 320 and 321 is a fillet, also can be other shape certainly.
See also Fig. 9, third embodiment of the invention light guide plate 4 has two incidence surfaces 40, and reaches and these exiting surface 41 opposed bottom surface with the exiting surface 41 that this incidence surface 40 intersects.The exiting surface 41 of this light guide plate 4 is provided with some lug, nib group 410 and some lug, nib groups 411 perpendicular to this incidence surface 40 that are parallel to this incidence surface 40, be parallel to the lug, nib group 410 of this incidence surface 40 and be interspersed perpendicular to the lug, nib group 411 of this incidence surface 40, because the place, end angle of these light guide plate 4 contiguous light sources belongs to fluorescent tube electric shock zone usually, emitting brightness is extremely low, thereby be difficult to realize the homogeneity of whole light guide plate 4 emitting brightness, so on the end angle of light guide plate 4 exiting surfaces 40, the lug, nib of each lug, nib group distributes closeer, light is increased in this place, end angle exit dose, improve the emitting brightness at this place, end angle, closely reach the homogeneity of whole light guide plate 4 emitting brightness.
Compared with prior art, owing to interlacedly on the described light guide plate exiting surface be provided with two kinds of lug, nib groups, wherein the lug, nib group perpendicular to the light guide plate incidence surface restrains light on the bearing of trend of light guide plate incidence surface, the lug, nib group that is parallel to the light guide plate incidence surface restrains light on the left and right directions of the bearing of trend of light guide plate incidence surface, each lug, nib group is minimum in the exiting surface area occupied of light guide plate again, and the lug, nib group is interspersed in the exiting surface of light guide plate, therefore, can claim this light guide plate to converge on the direction vertical light is comprehensive with exiting surface, as a whole, the light near vertical is in the exiting surface outgoing of light guide plate, and vertical incidence is to LCD.Along with away from incidence surface, the density that lug, nib distributes is increasing, and bigger in the end cornicult rib distribution density of light guide plate exiting surface, so the emitting brightness of whole light guide plate is higher and more even, can satisfy the requirement of use again.
In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included in the present invention's scope required for protection.
Claims (9)
1. light guide plate, it comprises:
Incidence surface;
One exiting surface that intersects with this incidence surface; And
One with this exiting surface opposed bottom surface;
Wherein, this exiting surface is provided with some lug, nib group and some lug, nib groups perpendicular to this incidence surface that are parallel to this incidence surface, and the lug, nib group that is parallel to this incidence surface is interspersed with lug, nib group perpendicular to this incidence surface, and each lug, nib group has some lug, nibs.
2. light guide plate as claimed in claim 1 is characterized in that, this each lug, nib group equates at the area of exiting surface.
3. light guide plate as claimed in claim 1 is characterized in that, the drift angle of these some lug, nibs is a wedge angle.
4. light guide plate as claimed in claim 1 is characterized in that, the drift angle of these some lug, nibs is a fillet.
5. light guide plate as claimed in claim 1 is characterized in that, the lug, nib of this lug, nib group increases along the direction distribution density away from incidence surface.
6. light guide plate as claimed in claim 1 is characterized in that, the lug, nib of this lug, nib group is bigger in the end angle of light guide plate exiting surface distribution density.
7. light guide plate as claimed in claim 1 is characterized in that, the bottom surface of this light guide plate is the plane.
8. light guide plate as claimed in claim 1 is characterized in that, the material of this light guide plate is a transparent resin material.
9. light guide plate as claimed in claim 8 is characterized in that, this transparent resin material is polymethylmethacrylate or polycarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510101560 CN1967341A (en) | 2005-11-18 | 2005-11-18 | Light conducting board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510101560 CN1967341A (en) | 2005-11-18 | 2005-11-18 | Light conducting board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1967341A true CN1967341A (en) | 2007-05-23 |
Family
ID=38076185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510101560 Pending CN1967341A (en) | 2005-11-18 | 2005-11-18 | Light conducting board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1967341A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016138677A1 (en) * | 2015-03-02 | 2016-09-09 | 深圳市华星光电技术有限公司 | Backlight unit and light guide plate thereof |
| WO2017092559A1 (en) * | 2015-12-01 | 2017-06-08 | 京东方科技集团股份有限公司 | Backlight module, and display device |
-
2005
- 2005-11-18 CN CN 200510101560 patent/CN1967341A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016138677A1 (en) * | 2015-03-02 | 2016-09-09 | 深圳市华星光电技术有限公司 | Backlight unit and light guide plate thereof |
| WO2017092559A1 (en) * | 2015-12-01 | 2017-06-08 | 京东方科技集团股份有限公司 | Backlight module, and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1808234A (en) | Light guide plate | |
| CN101140335A (en) | Light conducting plate and back light module unit Light conducting plate | |
| CN101144869A (en) | Light conductive board and the backlight module using same | |
| CN1781055A (en) | Front light for diffusely reflecting displays | |
| CN101994956A (en) | Planar illumination device | |
| CN1912703A (en) | Direct light backlight mould set and its transmitting plate | |
| CN1534353A (en) | Poor light apparatus and liquid crystal display | |
| CN1570720A (en) | Backlight source device and liquid crystal display | |
| CN202171654U (en) | Light guide plate and LED backlight | |
| CN2638097Y (en) | Luminous diode area source | |
| CN101042493A (en) | Back light module unit and light conducting plate thereof | |
| CN2588387Y (en) | Light conducting board and plane illumination device | |
| CN1967341A (en) | Light conducting board | |
| CN201652057U (en) | Backlight module and liquid crystal display screen | |
| CN100483208C (en) | Light-guiding board and back-light module using same | |
| CN103048727A (en) | LGP (Light Guide Plate), backlight source and LCD (Liquid Crystal Display) device | |
| CN100363810C (en) | Backlight module | |
| CN100529874C (en) | Light guide plate | |
| CN100376966C (en) | Plate for guiding light | |
| CN2613781Y (en) | Light reflection device | |
| CN2594828Y (en) | Surface light source devices | |
| CN103162185B (en) | Edge-lit type light-emitting diode (LED) backlight module and television | |
| CN2613785Y (en) | Light reflector assembly | |
| CN1492264A (en) | Light guide plate for back light system | |
| CN202600177U (en) | Light guide plate, edge-type backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20070523 |