CN1508571A - Light board and light source system - Google Patents
Light board and light source system Download PDFInfo
- Publication number
- CN1508571A CN1508571A CNA021497079A CN02149707A CN1508571A CN 1508571 A CN1508571 A CN 1508571A CN A021497079 A CNA021497079 A CN A021497079A CN 02149707 A CN02149707 A CN 02149707A CN 1508571 A CN1508571 A CN 1508571A
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- China
- Prior art keywords
- guide plate
- light guide
- light
- scattering
- exit facet
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Abstract
The invention is a kind of light source, which includes a light source and a light board, the light board comprises at least an entrance face receiving beams and a bottom face opposite to the exit face, there are several bulges on the bottom, the scattering facets forms a curved face, which is used to gather the beam scattered by the bulge, the bottom of the light board and the scattering face have a layer of reflecting film, the exit face is a coarse face with controllable coarse rate.
Description
[technical field]
The present invention relates to that a kind of bright dipping briliancy is higher, emitting uniform light guide plate and adopt the light-source system of this light guide plate.
[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.Do not have a characteristics of luminescence because of liquid crystal itself, being required to be it provides light-source system to realize Presentation Function.
The prior art 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 that this light-guide plate guides is sent light beam from light source is converted into the area source outgoing with line source or pointolite.This bottom surface of light guide plate a plurality of sites that distribute, in order to the total reflection condition of broken beam in the light guide plate internal transmission, and make its scattering to improve the homogeneity of light guide plate outgoing beam, and then the overall performance of raising light-source system, the density of this site, size all can have different designs to be applicable to different light-source systems.
One prior art light-source system can be consulted the United States Patent (USP) the 6th, 443, No. 583 (Fig. 1 reference) of bulletin on September 3rd, 2002, and this light-source system 100 comprises that a fluorescent tube 110, centers on the lampshade 120 of fluorescent tube 110 and the light guide plate 200 that an end is immobilizated in lampshade 120.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 further comprises a diffuser plate 220, first prism plate 230 and second prism plate 240 that is arranged in light guide plate 200 exiting surfaces 203 1 sides in regular turn, this diffuser plate 220 is used for strengthening the uniformity coefficient of light guide plate 200 outgoing beams, two prism plates 230 and 240 play the optically focused effect, to strengthen the briliancy of light-source system 100.
But, this light-source system 100 needs to adopt digonous runner plates 230 and 240 to focus on light beam from 203 outgoing of light guide plate 200 exiting surfaces to improve briliancy, adopt diffuser plate 220 so that outgoing beam is even, 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 need experience repeatedly optical effect betwixt, causes bigger optical loss, influences the briliancy of light-source system 100.
Therefore, provide the higher light guide plate of a kind of briliancy and a kind of simple in structure, cost is low, it is real in necessary to assemble easily light-source system.
[summary of the invention]
For overcoming the first lower technical matters of prior art light guide plate briliancy, the invention provides the higher light guide plate of a kind of briliancy.
For overcoming second technical matters that prior art light-source system complex structure, cost are higher, assembling is loaded down with trivial details, the invention provides a kind of simple in structure, cost is low, assemble light-source system easily.
The present invention solves the technical scheme that first technical matters takes: a kind of light guide plate is provided, this light guide plate comprises the plane of incidence of at least one receiving beam, intersect in order to the exit facet of guiding light beam outgoing and one and the exit facet opposed bottom surface with the plane of incidence, this bottom surface of light guide plate a plurality of projectioies that distribute, the scattering surface of these a plurality of projectioies constitutes a curved surface, in order to assemble the light beam after protruding scattering, this bottom surface of light guide plate and scattering surface are coated with reflectance coating, and this exit facet is one to have the uneven surface of may command roughness.
The present invention solves the technical scheme that second technical matters takes: a kind of light-source system is provided, this light-source system comprises a light source and a light guide plate, this light guide plate comprises the plane of incidence of at least one reception light source outgoing beam, intersect in order to the exit facet of guiding light beam outgoing and one and the exit facet opposed bottom surface with the plane of incidence, it is characterized in that: this bottom surface of light guide plate a plurality of projectioies that distribute, the scattering surface of these a plurality of projectioies constitutes a curved surface, in order to assemble the light beam after protruding scattering, this bottom surface of light guide plate and scattering surface are coated with reflectance coating, and this exit facet is one to have the uneven surface of may command roughness.
Compared with 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 constitutes the curved surface of a given shape, can assemble the light beam after protruding scattering, this bottom surface of light guide plate and scattering surface are coated with reflectance coating, can reduce the loss of light, this light guide plate exit facet is the uneven surface that the may command roughness distributes, can be used to divergent beams, thereby make that not only light guide plate bright dipping briliancy is higher, its homogeneity is also better.Light-source system of the present invention adopts the combination of light guide plate and light source, need not additionally use diffuser plate, and can not use prism plate or only use a prism plate, and it is simple in structure, cost is lower, and 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 of light-source system first embodiment of the present invention.
Fig. 3 is the sectional view of light-source system shown in Figure 2.
Fig. 4 is the stereographic map of light-source system second embodiment of the present invention.
Fig. 5 is the sectional view of light-source system shown in Figure 4.
Fig. 6 is the stereographic map of light-source system the 3rd embodiment of the present invention.
Fig. 7 is the sectional view of light-source system shown in Figure 6.
Fig. 8 is the stereographic map of light-source system the 4th embodiment of the present invention.
Fig. 9 is the partial sectional view of light guide plate one embodiment of the present invention.
[embodiment]
Figure 2 shows that light-source system first embodiment of the present invention, 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 this fluorescent tube 31.This two light source 30 is two planes of incidence, 21 settings of this light guide plate 20 relatively respectively.
Please consult Fig. 2 and Fig. 3 together, the bottom surface 24 of light guide plate 20 distributes a plurality of protruding 23.These a plurality of protruding 23 usefulness are so that beam divergence, destroy the light beam that enters from the plane of incidence 21 in the total reflection condition of light guide plate 20 internal transmission, and improve briliancy and homogeneity from the light beam of exit facet 22 outgoing.This a plurality of protruding 23 bottom surface 24 that is uniformly distributed in 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, in order to the light beam of convergence through protruding 23 scatterings, and then the briliancy of enhancing exit facet 22 outgoing beams.The bottom surface 24 of this light guide plate 20 and scattering surface 25 have reflectance coating (not indicating), and this reflectance coating is with SiO
2With TiO
2Alternately the multilayer film that form make projection beam reflection thereon, overflow from the bottom surface 24 of light guide plate 20 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 can reach more than 98%.This exit facet 22 in order to divergent beams, makes emergent light even for the uneven surface that the may command roughness distributes.
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 constitutes the curved surface of a given shape, can assemble light beam through protruding 23 scatterings, its bottom surface 24 and scattering surface 25 have reflectance coating can improve the optics utilization factor, and its exit facet 22 is the uneven surface that the may command roughness distributes, can be in order to divergent beams, thereby make that light guide plate 20 bright dipping briliancy are higher, and the certain homogeneity of tool.Light-source system 10 of the present invention adopts the combination of light guide plate 20 and light source 30, need not additionally use external modules such as reflecting plate, and it is simple in structure, cost is lower, and the energy loss of light beam is less.
Fig. 4 and Figure 5 shows that light-source system second embodiment of the present invention, this light-source system 11 comprises a light source 30 and a light guide plate 40.This light guide plate 40 comprises bottom surface 44 that a plane of incidence 41 and intersects with the plane of incidence 41 and an exit facet 42 relative with bottom surface 44, and this light source 30 can be line source (as cold cathode fluorescent lamp) or pointolite (as light emitting diode), its relative plane of incidence 41 settings.This bottom surface 44 and scattering surface 45 distribute a plurality of protruding 43, and the scattering surface 45 of this projection 43 forms a curved surface, and it be the part face of cylinder, in order to the light beam of convergence through protruding 43 scatterings.The size of this projection 43 and density increase gradually along the direction away from the plane of incidence 41, in order to improve the homogeneity of light guide plate 40 and light-source system 11 outgoing beams.This bottom surface 44 has reflectance coating (not indicating), and this reflectance coating is with SiO
2With TiO
2Replace the multilayer film that form.This exit facet 42 is uneven surfaces that the may command roughness distributes, and in order to divergent beams, makes emergent light even.
Fig. 6 and Fig. 7 are light-source system the 3rd embodiments 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 a wedge shape light guide plate, and it comprises bottom surface 64 that a plane of incidence 61 and tilts to link to each other with the plane of incidence 61 and an exit facet 62 relative with bottom surface 64.These light source 30 relative these planes of incidence 61 are provided with.The bottom surface 64 of this light guide plate 60 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 a cube, also can be cylindric, round table-like, spherical or rectangular-shaped.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 briliancy of enhancing exit facet 62 outgoing beams.The bottom surface 64 of this light guide plate 60 and scattering surface 65 have reflectance coating (indicating), overflow to prevent light beam, thus the energy loss of reduction light beam, this exit facet 62 in order to divergent beams, makes emergent light even for the uneven surface that the may command roughness distributes.
Figure 8 shows that light-source system the 4th embodiment of the present invention.This light-source system 13 comprises a light source 30 and a light guide plate 60.For further assembling the light beam that penetrates through light guide plate 60, improve the bright dipping briliancy of light-source system 13, can one prism plate 90 be set in light guide plate 60 exit facets 62 1 sides.
Fig. 9 is another embodiment of light guide plate of the present invention.This light guide plate 50 is roughly the same with the structure of light guide plate 20 shown in Figure 2, and it comprises a bottom surface 54 and the exit facet 52 relative with bottom surface 54.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, and it is a cube, also can be cylindric, round table-like, spherical or rectangular-shaped.These a plurality of scattering surfaces of protruding 53 55 form a curved surface, and it is an arc surface, in order to the light beam of convergence through protruding 53 scatterings, and then the briliancy of enhancing exit facet 52 outgoing beams.The bottom surface 54 of this light guide plate 50 and scattering surface 55 have reflectance coating (indicating), overflow to prevent light beam, thus the energy loss of reduction light beam, this exit facet 52 is uneven surfaces that the may command roughness distributes, and in order to divergent beams, makes emergent light even.
Claims (10)
1. light guide plate, this light guide plate comprises the plane of incidence of at least one receiving beam, intersect in order to the exit facet of guiding light beam outgoing and one and the exit facet opposed bottom surface with the plane of incidence, it is characterized in that: this bottom surface of light guide plate a plurality of projectioies that distribute, the scattering surface of these a plurality of projectioies constitutes a curved surface, in order to assemble the light beam after protruding scattering, this bottom surface of light guide plate and scattering surface are coated with reflectance coating, and this exit facet is one to have the uneven surface of may command roughness.
2. light guide plate according to 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 according to claim 1 is characterized in that: the curved surface that this protruding scattering surface constitutes is an arc surface.
4. light guide plate according to claim 1 is characterized in that: this wherein this projection can be cylindric, spherical, round table-like, rectangular-shaped or cube.
5. light guide plate according to claim 1 is characterized in that: these a plurality of projectioies are uniformly distributed in the bottom surface.
6. light guide plate according to 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.
7. light guide plate according to claim 1 is characterized in that: this light guide plate is plate shaped or the wedge shape light guide plate.
8. light guide plate according to claim 1 is characterized in that: this reflectance coating is by SiO
2With TiO
2Alternately form.
9. light-source system, comprise a light source and a light guide plate, this light guide plate comprises the plane of incidence of at least one reception light source outgoing beam, intersect in order to the exit facet of guiding light beam outgoing and one and the exit facet opposed bottom surface with the plane of incidence, it is characterized in that: this bottom surface of light guide plate a plurality of projectioies that distribute, the scattering surface of these a plurality of projectioies constitutes a curved surface, in order to assemble the light beam after protruding scattering, this bottom surface of light guide plate and scattering surface are coated with reflectance coating, and this exit facet is one to have the uneven surface of may command roughness.
10. light guide plate according to claim 9 is characterized in that: the curved surface that this protruding scattering surface constitutes is the part face of cylinder or arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021497079A CN1318865C (en) | 2002-12-20 | 2002-12-20 | Light board and light source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021497079A CN1318865C (en) | 2002-12-20 | 2002-12-20 | Light board and light source system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1508571A true CN1508571A (en) | 2004-06-30 |
| CN1318865C CN1318865C (en) | 2007-05-30 |
Family
ID=34233756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021497079A Expired - Fee Related CN1318865C (en) | 2002-12-20 | 2002-12-20 | Light board and light source system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1318865C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110025950A1 (en) * | 2009-07-30 | 2011-02-03 | Lee Sang-Hyun | Light guide plate and liquid crystal display device including the same |
| CN101529155B (en) * | 2006-05-25 | 2013-12-04 | I2Ic公司 | Energy efficient illumination for a light source |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128383A (en) * | 1981-02-02 | 1982-08-09 | Mitsubishi Electric Corp | Surface lighting apparatus |
| CN1162757A (en) * | 1995-03-06 | 1997-10-22 | 株式会社日立制作所 | Liquid crystal display device having side edge type back light system |
| JPH08327807A (en) * | 1995-05-30 | 1996-12-13 | Pioneer Electron Corp | Surface light source device |
| CN2336378Y (en) * | 1998-03-02 | 1999-09-01 | 宋义 | Uniform high-efficiency side-luminous backlight source |
| KR100292333B1 (en) * | 1999-03-29 | 2001-06-01 | 김태우 | Light source plate for Liguid crystal Display |
-
2002
- 2002-12-20 CN CNB021497079A patent/CN1318865C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529155B (en) * | 2006-05-25 | 2013-12-04 | I2Ic公司 | Energy efficient illumination for a light source |
| US20110025950A1 (en) * | 2009-07-30 | 2011-02-03 | Lee Sang-Hyun | Light guide plate and liquid crystal display device including the same |
| CN101988688A (en) * | 2009-07-30 | 2011-03-23 | 乐金显示有限公司 | Light guide plate and liquid crystal display device including the same |
| CN101988688B (en) * | 2009-07-30 | 2013-07-10 | 乐金显示有限公司 | Light guide plate and liquid crystal display device including the same |
| US8908124B2 (en) * | 2009-07-30 | 2014-12-09 | Lg Display Co., Ltd. | Light guide plate and liquid crystal display device including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1318865C (en) | 2007-05-30 |
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Granted publication date: 20070530 Termination date: 20151220 |
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| EXPY | Termination of patent right or utility model |