CN1609682A - Area illuminating apparatus and light conducting plate thereof - Google Patents
Area illuminating apparatus and light conducting plate thereof Download PDFInfo
- Publication number
- CN1609682A CN1609682A CN 200310111935 CN200310111935A CN1609682A CN 1609682 A CN1609682 A CN 1609682A CN 200310111935 CN200310111935 CN 200310111935 CN 200310111935 A CN200310111935 A CN 200310111935A CN 1609682 A CN1609682 A CN 1609682A
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- light
- guide plate
- illuminating device
- grooving
- light guide
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Abstract
The present invention discloses one kind of area light emitting device and its light guiding board. The area light emitting device includes at least one point light source and one light guiding board. The light guiding board includes at least one light incoming plane, one bottom plane crossed with the light incoming plane, and one light outgoing plane opposite to the bottom plane. The light incoming plane has several slots with gradiently changing width and depth, and the point light source is aligned with the slot with maximum width or depth.
Description
[technical field]
The invention relates to a kind of surface illuminating device and light guide plate thereof, particularly about a kind of surface illuminating device and light guide plate thereof that is used for LCD.
[background technology]
Because the liquid crystal itself in the panel of LCD does not have the characteristics of luminescence, thereby, for reaching display effect, need to give the LCD panel that one surface illuminating device is provided, its function is area source abundant to panel of LCD supply brightness and that be evenly distributed.
A kind of surface illuminating device of prior art as depicted in figs. 1 and 2, it is exposed in No. the 01112454th, disclosed Chinese patent application on November 21 calendar year 2001, this surface illuminating device comprises a light source 100 and a light guide plate 101.
This light source 100 has two illuminating parts 102, in this illuminating part 102 light emitting diode 21 is set.One end face of this light guide plate 101 (indicate) is relative with light source 100, and with illuminating part 102 over against the zone be provided with a plurality of grooving 111a that are the triangle taper, these a plurality of grooving 111a are divided into two light diffusion parts 111 of two groups of formation.
Light that autoluminescence diode 21 sends incides in the light guide plate 101 through the light area 126a relative with illuminating part 102, because the grooving 111a of triangle taper has two faces with respect to the light guide plate end slope, therefore, the light that incides at a certain angle on the light diffusion part 111 will be entered in the light guide plate 101 after the diffusion, thereby the light-emitting face of raising light guide plate 101 (indicating) is gone up the homogeneity of emitting brightness.
But, because light emitting diode 21 is point source of lights, its light that sends has certain dispersion angle, and the incident angle of light that incides different grooving 111a is also inequality, and the grooving 111a of this surface illuminating device designs in invariable mode, obviously do not fully take into account its different diffusions to different incidence angles degree light, therefore, though this surface illuminating device can be realized to a certain degree emitting brightness homogenising by grooving 111a, effect is still undesirable.
[summary of the invention]
Problem for the emitting brightness homogenising deficiency of the surface illuminating device that overcomes prior art the invention provides the higher surface illuminating device of a kind of emergent light brightness uniformity.
But the present invention also provides a kind of points of engagement light source and makes the higher light guide plate of outgoing luminance brightness homogeneity.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of surface illuminating device is provided, it comprises an at least one pointolite and a light guide plate, this light guide plate comprises bottom surface and the light-emitting face relative with this bottom surface that at least one light entrance face, intersects with this light entrance face, wherein, this at least one light entrance face has a plurality of groovings, the width of this grooving or the degree of depth formula in gradient change, and this at least one pointolite is right against the grooving setting with breadth extreme or degree of depth.
The present invention solves the technical scheme that another technical matters adopts: a kind of light guide plate is provided, it comprises bottom surface and a light-emitting face relative with this bottom surface that at least one light entrance face, intersects with this light entrance face, wherein, this at least one light entrance face has a plurality of groovings, and the width of this grooving or the degree of depth formula in gradient change.
Compared to prior art, because a plurality of grooving of the present invention formula in gradient changes, its width from pointolite over against the light entrance face place reduce gradually to both sides, make range points light source grooving at a distance obtain the diffusivity bigger, thereby make light guide plate end angular zone receive more light and improve the whole homogeneity of light-emitting face emitting brightness light.
[description of drawings]
Fig. 1 is the planimetric map of prior art surface illuminating device.
Fig. 2 is the stereographic map of the light guide plate of surface illuminating device shown in Figure 1.
Fig. 3 is the stereographic map of surface illuminating device first embodiment of the present invention.
Fig. 4 is the light guide plate of surface illuminating device first embodiment of the present invention and the planimetric map of pointolite.
Fig. 5 is the light guide plate of surface illuminating device first embodiment of the present invention and the local light path synoptic diagram of pointolite.
Fig. 6 is the stereographic map of surface illuminating device second embodiment of the present invention.
Fig. 7 is the light guide plate of surface illuminating device second embodiment of the present invention and the planimetric map of pointolite.
[embodiment]
Together with reference to figure 3 and Fig. 4, be first embodiment of surface illuminating device of the present invention please, this surface illuminating device 30 comprises a light guide plate 31, two pointolites 33 and a reflecting plate 35.Wherein this light guide plate 31 is wedge shape light guide plate, and it comprises bottom surface 315 that a light entrance face 313, intersects with light entrance face 313 and a light-emitting face 311 relative with this bottom surface 315.These two pointolites 33 are provided with respect to light entrance face 313, can be light emitting diode or miniature bulb.The bottom surface 315 of this light guide plate 31 is provided with the site 37 of a plurality of regular distribution, and a plurality of V-arrangement groovings 3111 are set on this light-emitting face 311.Reflecting plate 35 is fitted in bottom surface 315 1 sides of light guide plate 31, and this reflecting plate 35 also can be substituted by the reflectance coating that is plated on bottom surface 315 and the site 37.
The relative V-arrangement grooving 3131 of a plurality of and this pointolite 33 is set on this light entrance face 313, and the depth D of these a plurality of groovings 3131 is constant, width W from pointolite 33 over against light entrance face 313 places reduce gradually to both sides.This grooving 3131 and light-emitting face 311 are vertical and connect light-emitting face 311 and bottom surface 315.
As shown in Figure 5, be the diffusion principle figure of the light that sent of 3131 pairs of light emitting diodes 33 of these a plurality of groovings, details are as follows.When light guide plate 31 does not have grooving 3131, light 331 will incide virtual plane 3133 (plane shown in the dotted line), and enter light guide plate 31 with light 3311 after reflecting; When light guide plate 31 has grooving 3131 of the present invention, when light 331 incides the inclined-plane 3131a of relative light entrance face 313 inclinations, it will be refracted as light 3313 and enter light guide plate 31, compare the travel path of light 3311 and light 3313, and the diffusion angle of luminous ray 3313 is bigger.And when light 332 incides the virtual plane 3131c parallel with inclined-plane 3131a, it will enter light guide plate 31 with light 3321 after reflecting; When light 332 incides the inclined-plane 3131b of relative light entrance face 313 inclinations, it will be refracted as light 3323 and enter light guide plate 31, the travel path that compares light 3321 and light 3323, the diffusion angle of luminous ray 3323 is bigger, that is to say: because the width W of grooving 3131 of the present invention from pointolite 33 over against light entrance face 313 places reduce gradually to both sides, the divergence characterization of this light emitting diode 33 self light cooperates the inclined-plane 3131a of grooving 3131, the variation of 3131b, thereby make to obtain the diffusivity bigger, and then make light guide plate 31 end angle 31a zone receive more light and improve the whole homogeneity of light-emitting face 311 emitting brightness light 332 apart from pointolite 33 grooving 3131 at a distance.
Enter the light of light guide plate 31 after 3131 diffusions of a plurality of groovings, wherein a part is directly through light-emitting face 311 outgoing, other a part of light then through after the scattering of 315 sites 37, bottom surface from light-emitting face 311 outgoing.35 of reflecting plates can make 315 light reflected light exit facet 311 outgoing that spill from the bottom surface, thereby improve the brightness of emergent light.The a plurality of V-arrangement groovings 3111 that are provided with on this light-emitting face 311 also work the effect of converging to light, with the brightness of further raising emergent light.
Please refer to Fig. 6 and Fig. 7 again, is second embodiment of surface illuminating device of the present invention.This surface illuminating device 50 also comprises a light guide plate 51, two pairs of pointolites 53 and reflecting plates 55, its difference with surface illuminating device 30 shown in Figure 3 is that this light guide plate 51 is plate shaped light guide plate, and this light guide plate 51 comprises two relative light entrance faces 513, and these two pairs of pointolites 53 are these two light entrance faces, 513 settings relatively respectively.
The site 57 range points light sources 53 of these light guide plate 51 bottom surfaces 515 are far away more, and the size of site 57 is big more, with to the abundant scattering of the light of point of distance light source 53, improve the whole homogeneity of light-emitting face 511 emitting brightness.
These two light entrance faces 513 are provided with a plurality of groovings 5131, and, the light that receives because of the grooving 5131 of point of distance light source 53 is oblique incidence, when these grooving 5131 depth D are dark, its bottom is difficult to receive light, so, the depth D of this grooving 5131 be designed to from pointolite 53 over against light entrance face 513 places reduce gradually to both sides.The width W of this grooving 5131 also from pointolite 53 over against light entrance face 513 places reduce gradually to both sides, to improve the whole homogeneity of light-emitting face 511 emitting brightness.
Claims (10)
1. surface illuminating device, it comprises an at least one pointolite and a light guide plate, this light guide plate comprises bottom surface and the light-emitting face relative with this bottom surface that at least one light entrance face, intersects with this light entrance face, this at least one light entrance face has a plurality of groovings, it is characterized in that: the width of this grooving or the degree of depth formula in gradient change, and this at least one pointolite is to be right against the grooving setting with breadth extreme or degree of depth.
2. surface illuminating device according to claim 1 is characterized in that: this grooving is the V-type groove.
3. surface illuminating device according to claim 1 is characterized in that: the degree of depth of this grooving from pointolite over against the light entrance face place reduce gradually to both sides.
4. surface illuminating device according to claim 1 is characterized in that: the width of this grooving from pointolite over against the light entrance face place reduce gradually to both sides.
5. surface illuminating device according to claim 1 is characterized in that: the width of this grooving and the degree of depth all from pointolite over against the light entrance face place reduce gradually to both sides.
6. surface illuminating device according to claim 1 is characterized in that: this pointolite is light emitting diode or miniature bulb.
7. surface illuminating device according to claim 1 is characterized in that: it further comprises a reflecting plate, and this reflecting plate is positioned at bottom surface one side of light guide plate.
8. surface illuminating device according to claim 1 is characterized in that: the light-emitting face of this light guide plate has a plurality of V-type groovings.
9. surface illuminating device according to claim 1 is characterized in that: the bottom surface of this light guide plate is provided with a plurality of scattering netted dots.
10. the light guide plate of a points of engagement light source, it comprises bottom surface and a light-emitting face relative with this bottom surface that at least one light entrance face, intersects with this light entrance face, this at least one light entrance face has a plurality of groovings, it is characterized in that: the width of this grooving or the degree of depth formula in gradient change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101119359A CN100445837C (en) | 2003-10-23 | 2003-10-23 | Area illuminating apparatus and light conducting plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101119359A CN100445837C (en) | 2003-10-23 | 2003-10-23 | Area illuminating apparatus and light conducting plate thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1609682A true CN1609682A (en) | 2005-04-27 |
| CN100445837C CN100445837C (en) | 2008-12-24 |
Family
ID=34759530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101119359A Expired - Fee Related CN100445837C (en) | 2003-10-23 | 2003-10-23 | Area illuminating apparatus and light conducting plate thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100445837C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7303324B2 (en) | 2005-05-13 | 2007-12-04 | Tsing Hua University | Backlight module |
| CN100468157C (en) * | 2005-11-01 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Light guidance plate |
| CN102740089A (en) * | 2011-04-12 | 2012-10-17 | 青岛海信电器股份有限公司 | 3D display equipment, 3D display equipment backlight scanning control method and apparatus thereof |
| CN101446405B (en) * | 2007-11-27 | 2013-05-22 | 美蓓亚株式会社 | Spread illuminating apparatus |
| CN103680339A (en) * | 2013-12-11 | 2014-03-26 | 广东长虹电子有限公司 | Radiating board and displayer with radiating board |
| CN103941324A (en) * | 2014-03-18 | 2014-07-23 | 京东方科技集团股份有限公司 | Light guide plate, backlight source module and display device |
| CN104536079A (en) * | 2014-12-31 | 2015-04-22 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module with light guide plate |
| CN105759339A (en) * | 2016-02-23 | 2016-07-13 | 安比斯特殊玻璃（苏州）有限公司 | Glass light guide plate and liquid crystal display module thereof |
| CN106980149A (en) * | 2016-01-15 | 2017-07-25 | 法雷奥照明湖北技术中心有限公司 | Light guide |
| CN108037560A (en) * | 2017-12-26 | 2018-05-15 | 重庆市中光电显示技术有限公司 | Light guide plate and backlight module |
| CN104880762B (en) * | 2015-06-09 | 2018-11-06 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065060A (en) | 2016-12-30 | 2017-08-18 | 苏州维旺科技有限公司 | A kind of light guide plate with tooth form incidence surface |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3384483B2 (en) * | 1997-04-17 | 2003-03-10 | 株式会社エンプラス | Sidelight type surface light source device |
| JP4367801B2 (en) * | 1999-07-22 | 2009-11-18 | シチズン電子株式会社 | Planar light source unit |
| JP2001043719A (en) * | 1999-07-28 | 2001-02-16 | Citizen Electronics Co Ltd | Surface light source unit |
| ATE353447T1 (en) * | 1999-12-28 | 2007-02-15 | Fujitsu Kasei Kk | LIGHTING APPARATUS FOR DISPLAY |
| JP2002298628A (en) * | 2001-03-30 | 2002-10-11 | Minebea Co Ltd | Flat lighting device |
| JP3537414B2 (en) * | 2001-10-05 | 2004-06-14 | 富士通株式会社 | Liquid crystal display for use in electronic equipment |
| CN100523945C (en) * | 2002-10-04 | 2009-08-05 | 日亚化学工业株式会社 | Light quiding plate used for surface luminuous device and surface luminuous device using light guiding plate |
-
2003
- 2003-10-23 CN CNB2003101119359A patent/CN100445837C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7303324B2 (en) | 2005-05-13 | 2007-12-04 | Tsing Hua University | Backlight module |
| CN100468157C (en) * | 2005-11-01 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Light guidance plate |
| CN101446405B (en) * | 2007-11-27 | 2013-05-22 | 美蓓亚株式会社 | Spread illuminating apparatus |
| CN102740089A (en) * | 2011-04-12 | 2012-10-17 | 青岛海信电器股份有限公司 | 3D display equipment, 3D display equipment backlight scanning control method and apparatus thereof |
| CN103680339A (en) * | 2013-12-11 | 2014-03-26 | 广东长虹电子有限公司 | Radiating board and displayer with radiating board |
| CN103941324A (en) * | 2014-03-18 | 2014-07-23 | 京东方科技集团股份有限公司 | Light guide plate, backlight source module and display device |
| CN104536079A (en) * | 2014-12-31 | 2015-04-22 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module with light guide plate |
| WO2016106854A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module having same |
| CN104880762B (en) * | 2015-06-09 | 2018-11-06 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
| CN106980149A (en) * | 2016-01-15 | 2017-07-25 | 法雷奥照明湖北技术中心有限公司 | Light guide |
| CN105759339A (en) * | 2016-02-23 | 2016-07-13 | 安比斯特殊玻璃（苏州）有限公司 | Glass light guide plate and liquid crystal display module thereof |
| CN108037560A (en) * | 2017-12-26 | 2018-05-15 | 重庆市中光电显示技术有限公司 | Light guide plate and backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100445837C (en) | 2008-12-24 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20081224 Termination date: 20171023 |