CN1506699A - Ligh conducting plate - Google Patents
Ligh conducting plate Download PDFInfo
- Publication number
- CN1506699A CN1506699A CNA021496358A CN02149635A CN1506699A CN 1506699 A CN1506699 A CN 1506699A CN A021496358 A CNA021496358 A CN A021496358A CN 02149635 A CN02149635 A CN 02149635A CN 1506699 A CN1506699 A CN 1506699A
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- Prior art keywords
- guide plate
- light guide
- light
- plane
- incidence
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- Light Guides In General And Applications Therefor (AREA)
Abstract
The light conducting plate is used in guiding the transmission direction of light from light source to raise the brightness and homogeneity of emergent light. The light conducting plate includes incident plane for accepting light beam, emergent plane for guiding light beam and bottom plane opposite to the emergent plane, and the incident plane and the emergent plane intersect. The bottom plane has several distributed lugs to constitute curved surface in special shape and the curved surface can converge the light beams the lugs scatter to raise the emergent light brightness of the light conducting plate.
Description
[technical field]
The present invention relates to a kind of light guide plate, especially about the higher light guide plate of a kind of emitting brightness.
[background technology]
Because advantages such as the liquid crystal indicator tool is light, thin, power consumption is little are widely used in modernized information equipments such as notebook, mobile phone, personal digital assistant.Because liquid crystal itself is not had a characteristics of luminescence, being required to be it provides light-source system to realize Presentation Function.
Existing light-source system comprises light source and light guide plate, the incidence surface setting of the relative light guide plate of light source, and the transmission direction of the light beam that this light-guide plate guides is sent from light source converts line source or pointolite to the area source outgoing.A plurality of sites that distribute, the bottom surface of this light guide plate in order to the total reflection condition of broken beam in the light guide plate internal transmission, and make its scattering improving the homogeneity of light guide plate outgoing beam, and then promote the overall performance of light-source system.The density of this site, size all can have different designs to adapt to different light-source systems.
A kind of existing light-source system can be consulted the United States Patent (USP) the 6th of bulletin on September 3rd, 2002,443, No. 583 (Fig. 1 with reference to), this light-source system 100 comprise that a fluorescent tube 110, is retained on the light guide plate 200 in the lampshade 120 around the lampshade 120 of fluorescent tube 110 and an end.This light guide plate 200 comprises incidence surface 201, bottom surface 202 and exiting surface 203, and wherein, these fluorescent tube 110 relative these incidence surfaces 201 are provided with.During work, in these light guide plate 200 internal transmission, and be converted to area source through exiting surface 203 outgoing from the light beam of fluorescent tube 110 and lampshade 120.For increasing the utilization factor of light beam, this light-source system 100 comprises that further one is arranged at the reflecting plate 210 of bottom surface 202 1 sides of light guide plate 200, the segment beam of reflecting plate 210 reflection 202 outgoing from the bottom surface.And this light-source system 100 is arranged a diffuser plate 220, first prism plate 230 and second prism plate 240 in regular turn in light guide plate 200 exiting surfaces 203 1 sides, this diffuser plate 220 is in order to strengthen the uniformity coefficient of light guide plate 200 outgoing beams, digonous runner plate 230 and 240 play the optically focused effect, to strengthen the brightness of light guide plate 200.
But, adopt the light-source system 100 of this existing light guide plate 200 to need to adopt digonous runner plate 230 and 240 to improve brightness with the light beam of assembling from 203 outgoing of light guide plate 200 exiting surfaces, adopt reflecting plate 210 to improve the light beam utilization factor, make its complex structure, material cost height and assembling inconvenience.In addition, have more optical interface in this light-source system 100, light beam therebetween need experience repeatedly optical effect, causes bigger luminous energy loss, thereby influences the brightness of light-source system 100.
[summary of the invention]
For overcoming the existing not high problem of light guide plate emitting brightness, the invention provides that a kind of emitting brightness is higher, the light guide plate of excellent optical performance.
The technical scheme of technical solution problem of the present invention is: light guide plate of the present invention comprises at least one plane of incidence that is used for receiving beam, one and the exit facet that intersects of the plane of incidence and one and the exit facet opposed bottom surface.This bottom surface a plurality of projectioies that distribute, and the scattering surface of projection constitutes a curved surface that is used for convergent beam.
Wherein, the curved surface of this protruding scattering surface formation can be the part face of cylinder or arc surface.This projection can be cylindric, spherical, round table-like, rectangular-shaped or cube.These a plurality of projectioies can be uniformly distributed in the bottom surface, and its size and density also can increase gradually along the direction away from the plane of incidence.
This light guide plate can be plate shaped or the wedge shape light guide plate.
Compare prior art, the invention has the beneficial effects as follows: the bottom surface of light guide plate of the present invention a plurality of projectioies that distribute, and the scattering surface of projection forms the curved surface of a given shape, can assemble the light beam after protruding scattering, thereby can improve the light beam utilization factor, make that the light guide plate emitting brightness is higher, the homogeneity that tool is certain.Adopt the light-source system of light guide plate of the present invention can not use prism plate or only use a prism plate, it is simple in structure, cost is lower, the energy loss of light beam is less.
[description of drawings]
Fig. 1 is the cut-open view of prior art light-source system.
Fig. 2 is the stereographic map that adopts the light-source system of light guide plate first embodiment of the present invention.
Fig. 3 is the cut-open view of light-source system shown in Figure 2 along the III-III direction.
Fig. 4 is the stereographic map that adopts the light-source system of light guide plate second embodiment of the present invention.
Fig. 5 is the cut-open view of light-source system shown in Figure 4 along the V-V direction.
Fig. 6 is the stereographic map that adopts the light-source system of light guide plate the 3rd embodiment of the present invention.
Fig. 7 is the cut-open view of light-source system shown in Figure 6 along the VII-VII direction.
Fig. 8 is the cut-open view that adopts another light-source system of light guide plate the 3rd embodiment of the present invention.
Fig. 9 is the partial sectional view of light guide plate the 4th embodiment of the present invention.
[embodiment]
Seeing also Fig. 2, is the light-source system that adopts light guide plate first embodiment of the present invention, and this light-source system 10 comprises a light guide plate 20 and two light sources 30.This light guide plate 20 comprises two planes of incidence 21, an exit facet 22 that links to each other with the plane of incidence 21 and one and exit facet 22 opposed bottom surface 24.This light source 30 comprises that a fluorescent tube 31 and a part center on the reflex housing 32 of fluorescent tube 31.This two light source 30 is two planes of incidence, 21 settings of this light guide plate 20 relatively respectively.
Please cooperate and consult Fig. 2 and Fig. 3, the bottom surface 24 of this light guide plate 20 distributes a plurality of protruding 23.This a plurality of protruding 23 is used for making beam divergence, destroys the light beam that enters from the plane of incidence 21 in the total reflection condition of light guide plate 20 internal transmission, and improves brightness and homogeneity from the light beam of exit facet 22 outgoing.This a plurality of protruding 23 bottom surface 24 that is evenly distributed on this light guide plate 20, it is a cube, also can be cylindric, round table-like, spherical or rectangular-shaped.These a plurality of scattering surfaces of protruding 23 25 form a curved surface, and it is the part face of cylinder, is used for assembling the light beam through protruding 23 scatterings, and then strengthens the brightness of exit facet 22 outgoing beams.The bottom surface 24 of this light guide plate 20 and the scattering surface 25 of projection 23 have reflectance coating (not indicating), and this reflectance coating is by SiO
2And TiO
2Replace the multilayer film of formation, make projection beam reflection thereon, overflow from the bottom surface 24 of light guide plate 20 and the scattering surface 25 of projection 23 to prevent light beam, thus the energy loss of reduction light beam, the whole optical property of raising light guide plate 20.This reflectance coating can adopt methods such as chemical vapour deposition technique, electron beam evaporation plating method, sputtering method to form, and its reflectivity at visible region is at least 98%.
Compare prior art, because the bottom surface 24 of light guide plate 20 of the present invention distributes a plurality of protruding 23, and the scattering surface 25 of projection 23 forms the curved surface of a given shape, can assemble light beam through protruding 23 scatterings, and the scattering surface 25 of bottom surface 24 and projection 23 has reflectance coating, can improve the light beam utilization factor, thereby make that light guide plate 20 emitting brightness are higher, the homogeneity that tool is certain.Adopt the light-source system 10 of light guide plate 20 of the present invention need not additionally use outer members such as reflecting plate, it is simple in structure, cost is lower, and the energy loss of light beam is less.
Seeing also Fig. 4 and Fig. 5, is the light-source system that adopts light guide plate second embodiment of the present invention, and this light-source system 11 comprises a light source 30 and a light guide plate 40.This light guide plate 40 comprises a plane of incidence 41 and one and the plane of incidence 41 end 44 of intersecting, and this light source 30 can be line source (as cathode fluorescent tube) or pointolite (as light emitting diode), and its relative plane of incidence 41 is provided with.This bottom surface 44 distributes a plurality of protruding 43, and the scattering surface 45 of this projection 43 forms a curved surface, and it is the part face of cylinder, is used for assembling the light beam through protruding 43 scatterings.The size of this projection 43 and density increase gradually along the direction away from the plane of incidence 41, are used for improving the homogeneity of light guide plate 40 and light-source system 11 outgoing beams.The scattering surface 45 of this bottom surface 44 and projection 43 has reflectance coating (not indicating), and this reflectance coating is by SiO
2And TiO
2Replace the multilayer film that form.
Seeing also Fig. 6 and Fig. 7, is the light-source system that adopts light guide plate the 3rd embodiment of the present invention.This light-source system 12 comprises a light source 30 and a light guide plate 60.This light guide plate 60 is wedge shape light guide plate, and it comprises a plane of incidence 61 and a bottom surface 64 that links to each other with the plane of incidence 61 inclinations, and these light source 30 relative these planes of incidence 61 are provided with.This bottom surface 64 distributes a plurality of protruding 63.This a plurality of protruding 63 bottom surface 64 that is uniformly distributed in this light guide plate 60, it is rectangular-shaped, also can be cylindric, round table-like, spherical or cube.These a plurality of scattering surfaces of protruding 63 65 form a curved surface, and it is the part face of cylinder, in order to the light beam of convergence through protruding 63 scatterings, and then the brightness of enhancing light guide plate 60 outgoing beams.The bottom surface 64 of this light guide plate 60 and protruding 63 scattering surface 65 have reflectance coating (sign), overflow from the bottom surface 64 of light guide plate 60 and the scattering surface 65 of projection 63 to prevent light beam, thus the energy loss of reduction light beam, the whole optical property of raising light guide plate 60.
Seeing also Fig. 8, is another light-source system that adopts light guide plate the 3rd embodiment of the present invention.This light-source system 13 comprises a light source 30 and a light guide plate 70.The structure of the structure of this light guide plate 70 and light guide plate shown in Figure 6 60 is roughly the same, and difference is, a reflectance coating is not had in its bottom surface 74, a reflecting plate 78 is set 74 overflows from the bottom surface to prevent light beam.For further strengthening the homogeneity of light-source system 13 outgoing beam brightness, exit facet 72 1 sides in light guide plate 70 are provided with a diffuser plate 80, for further assembling light beam through diffuser plate 80 scatterings, improve the emitting brightness of light-source system 13, can one prism plate 90 be set in the opposite side of diffuser plate 80 and exit facet 72 adjacent sides.
Seeing also Fig. 9, is the 4th embodiment of light guide plate of the present invention.The structure of this light guide plate 50 and light guide plate shown in Figure 2 20 is roughly the same, and it comprises a bottom surface 54, and this bottom surface 54 distributes a plurality of protruding 53.This a plurality of protruding 53 bottom surface 54 that is uniformly distributed in this light guide plate 50, it is rectangular-shaped, also can be cylindric, round table-like, spherical or cube.These a plurality of scattering surfaces of protruding 53 55 form a curved surface, and it is an arc surface, is used for assembling the light beam through protruding 53 scatterings, and then strengthens the brightness of light guide plate 50 outgoing beams.The bottom surface 54 of this light guide plate 50 and protruding 53 scattering surface 55 have reflectance coating (sign), overflow from the bottom surface 54 of light guide plate 50 and the scattering surface 55 of projection 53 to prevent light beam, thus the energy loss of reduction light beam, the whole optical property of raising light guide plate 50.
Claims (8)
1. light guide plate, it comprises at least one plane of incidence that is used for receiving beam, one and the exit facet that intersects of the plane of incidence and one and the exit facet opposed bottom surface, this bottom surface a plurality of projectioies that distribute wherein, it is characterized in that: the scattering surface of these a plurality of projectioies constitutes a curved surface in order to convergent beam.
2. light guide plate as claimed in claim 1 is characterized in that the curved surface that this protruding scattering surface constitutes is the part face of cylinder.
3. light guide plate as claimed in claim 1 is characterized in that the curved surface that this protruding scattering surface constitutes is an arc surface.
4. light guide plate as claimed in claim 1 is characterized in that this projection is a cube.
5. light guide plate as claimed in claim 1, it is cylindric, spherical, round table-like or rectangular-shaped to it is characterized in that this projection can be.
6. light guide plate as claimed in claim 1 is characterized in that these a plurality of projectioies are uniformly distributed in the bottom surface.
7. light guide plate as claimed in claim 1 is characterized in that the size of these a plurality of projectioies and density increase gradually along the direction away from the plane of incidence.
8. light guide plate as claimed in claim 1 is characterized in that this light guide plate is plate shaped or the wedge shape light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021496358A CN100389350C (en) | 2002-12-11 | 2002-12-11 | Ligh conducting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021496358A CN100389350C (en) | 2002-12-11 | 2002-12-11 | Ligh conducting plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1506699A true CN1506699A (en) | 2004-06-23 |
| CN100389350C CN100389350C (en) | 2008-05-21 |
Family
ID=34233713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021496358A Expired - Fee Related CN100389350C (en) | 2002-12-11 | 2002-12-11 | Ligh conducting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100389350C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885370B (en) * | 2005-06-24 | 2010-05-05 | 海尔集团公司 | Display device |
| CN102200596A (en) * | 2010-03-24 | 2011-09-28 | 索尼公司 | Optically-functional film and method of manufacturing the same, display and method of manufacturing the same |
| CN105572792A (en) * | 2016-03-16 | 2016-05-11 | 福建鸿博光电科技有限公司 | Light guide plate |
| CN106838728A (en) * | 2017-03-16 | 2017-06-13 | 漳州立达信光电子科技有限公司 | A kind of LED panel lamp |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0713159A (en) * | 1993-06-21 | 1995-01-17 | Nitsusen Kagaku Kk | Surface illumination edge lighting device |
| JP3799749B2 (en) * | 1997-06-23 | 2006-07-19 | セイコーエプソン株式会社 | LIGHTING DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC DEVICE |
| JPH11202331A (en) * | 1998-01-20 | 1999-07-30 | Starlite Co Ltd | Light guide plate |
| JPH11326898A (en) * | 1998-05-11 | 1999-11-26 | Toshiba Corp | Reflection type liquid crystal display device |
| JP2001297615A (en) * | 2000-04-12 | 2001-10-26 | Keiwa Inc | Optical sheet and backlight unit using the same |
-
2002
- 2002-12-11 CN CNB021496358A patent/CN100389350C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885370B (en) * | 2005-06-24 | 2010-05-05 | 海尔集团公司 | Display device |
| CN102200596A (en) * | 2010-03-24 | 2011-09-28 | 索尼公司 | Optically-functional film and method of manufacturing the same, display and method of manufacturing the same |
| CN102200596B (en) * | 2010-03-24 | 2015-05-20 | 索尼公司 | Optically-functional film and method of manufacturing the same, display and method of manufacturing the same |
| CN105572792A (en) * | 2016-03-16 | 2016-05-11 | 福建鸿博光电科技有限公司 | Light guide plate |
| CN106838728A (en) * | 2017-03-16 | 2017-06-13 | 漳州立达信光电子科技有限公司 | A kind of LED panel lamp |
| CN106838728B (en) * | 2017-03-16 | 2019-12-24 | 漳州立达信光电子科技有限公司 | LED panel light |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100389350C (en) | 2008-05-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080521 Termination date: 20151211 |
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| EXPY | Termination of patent right or utility model |