CN100357808C - Area light source system - Google Patents
Area light source system Download PDFInfo
- Publication number
- CN100357808C CN100357808C CNB021496498A CN02149649A CN100357808C CN 100357808 C CN100357808 C CN 100357808C CN B021496498 A CNB021496498 A CN B021496498A CN 02149649 A CN02149649 A CN 02149649A CN 100357808 C CN100357808 C CN 100357808C
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- CN
- China
- Prior art keywords
- light
- light source
- guide plate
- light guide
- source system
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Abstract
The present invention relates to an area light source system which comprises a light source, a light guiding plate, an emission surface and a plurality of side surfaces, wherein the light source emits light beams; the light guiding plate guides the light beams which are generated by the light source and comprises an entrance surface, and the light seams coming from the light source pass through the entrance surface and then enter the light guiding plate; the side surfaces are positioned at the side edge of the emission surface of a base body and are atomizing side surfaces which reflect the light beams emitted towards the side surfaces in the light guiding plate over again.
Description
[technical field]
The present invention relates to a kind of surface light source system, relate in particular to a kind of surface light source system that display has the high light utilization factor that is used for.
[background technology]
Light guide plate is an important optical module of LCD surface light source system, and itself and other optical module such as light source, reflecting plate, diffuser plate and prism plate constitute surface light source system, for the liquid crystal display displays pattern provides required light.Light guide plate mainly comprises light entrance face, exit facet, transmission face and a plurality of side, its effect be the light that sends of guiding point light source or line source from the exit facet outgoing, improve the homogeneity of panel glorious degrees and glorious degrees thereof simultaneously.
The United States Patent (USP) the 5th that on September 7th, 1999 was announced, 947, a kind of existing light guide plate module 10 that is disclosed for No. 578, as shown in Figure 1, this light guide plate module 10 comprises a light guide plate 12 and a housing 14, and this light guide plate 12 is placed in the housing 14, this housing 14 includes a plurality of medial surfaces 15, these a plurality of medial surfaces 15 all are coated with the diffused reflecting material, are used to reflect from light source 16 and the light beam that penetrated by light guide plate 12 each side, make this light beam again in the directive light guide plate 12 to improve the utilization factors of light.But this medial surface 15 can not be realized fitting fully with the lateral surface of light guide plate 12, therefore there is segment beam to produce loss because of the spacing between each side of the medial surface 15 of housing 14 and light guide plate 12, thereby there is the segment beam can not reflected back light guide plate 12, therefore the light utilization efficiency of the light guide plate 12 of the prior art is lower, thereby makes the light utilization efficiency of the surface light source system that adopts this light guide plate lower.
In addition, also often adopt in the prior art and stick sealing strip in the light guide plate side and penetrate, but the sealing bar is to combine with light guide plate in the adhesion mode to prevent light, easy impaired or come off in carrying or other operation; And the sealing bar is difficult to cover the light guide plate side fully, still have part light to penetrate from not sealed side that is covered, thereby light utilization efficiency is still lower.
So, a kind of very necessity of the higher surface light source system of light utilization efficiency that has is provided.
[summary of the invention]
For overcoming the existing lower defective of surface light source system light utilization efficiency, the invention provides the surface light source system that a kind of cost is lower, have the good light utilization factor.
The technical scheme of technical solution problem of the present invention is: provide a kind of surface light source system to comprise: a light source is used for outgoing beam; One light guide plate is used to guide the light beam that light source sends, and wherein this light guide plate comprises: a plane of incidence, be used for receiving light beam from light source, and make it enter light guide plate by this plane of incidence; One exit facet is used for outgoing to import the light beam of this light guide plate inside by the plane of incidence; A plurality of sides are positioned at the side of this light guide plate exit facet; It is characterized in that these a plurality of sides are the atomizing side, be used for reflecting the light beam of these a plurality of sides of directive, make its directive light guide plate inside again.
Compared with prior art, surface light source system of the present invention effectively reclaims the invalid light that transmits from the light guide plate side by utilizing an atomizing side more than the light guide plate, show briliancy to increase, improve light utilization efficiency, and side because of its light guide plate that only needs to atomize, and need not to use reflecting material or sealing strip, thereby reduce cost.
[description of drawings]
Fig. 1 is the stereographic map of prior art light guide plate.
Fig. 2 is the stereographic map of light guide plate first embodiment of surface light source system of the present invention.
Fig. 3 is a side schematic view of light guide plate first embodiment of surface light source system of the present invention.
Fig. 4 is the another side synoptic diagram of light guide plate first embodiment of surface light source system of the present invention.
Fig. 5 is the stereographic map of light guide plate second embodiment of surface light source system of the present invention.
Fig. 6 is a side schematic view of light guide plate second embodiment of surface light source system of the present invention.
Fig. 7 is the another side synoptic diagram of light guide plate second embodiment of surface light source system of the present invention.
Fig. 8 is the stereographic map of surface light source system of the present invention.
[embodiment]
Please refer to Fig. 2, surface light source system of the present invention comprises a light guide plate 2, and this light guide plate 2 comprises a matrix 25, and wherein, this matrix 25 further comprises a plane of incidence 20, a transmission face 21, an exit facet 22 and first side 24, second side 26 and the 3rd side 28.Wherein, this plane of incidence 20 is between this transmission face 21 and this exit facet 22, and light beam enters the matrix 25 of light guide plate 2 by this plane of incidence 20; This transmission face 21 is relative with this exit facet 22, transmission from the light beam of the plane of incidence 20 to exit facet 22; This first side 24, second side 26 and the 3rd side 28 be positioned at this matrix 25 exit facet 22 side and link to each other with this exit facet 22.
Since when light by when surface, this surface generally will have about 4% the light of injecting to be reflected, thereby for reducing the loss of luminous energy, be equipped with anti-reflective film on the plane of incidence 20 of this matrix 25 and the exit facet 22, with the increase light transmission rate.
In addition, please be simultaneously with reference to Fig. 3 and Fig. 4, first side 24, second side 26 and the 3rd side 28 are the atomizing side, with the light beam of reflection from the plane of incidence 20, transmission face 21 and exit facet 22, and make this light beam directive matrix 25 inside again, penetrate through exit facet 22.Wherein, second side 26 comprises two minute surface ends 261,262, and this two minute surfaces end 261,262 lays respectively at the diagonal angle end that intersect second side 26 and first side 24 and second side 26 and the 3rd side 28.The length of this two minute surfaces end 261,262 is about 10% of second side, 26 length respectively, and the secondary reflection that this two minute surfaces end 261,262 will effectively avoid light beam to produce at the two diagonal angle ends that intersect the atomizing side is to reduce interference.
In the lump with reference to Fig. 5, Fig. 6 and Fig. 7, be second embodiment of the light guide plate of surface light source system of the present invention please, this light guide plate 2 ' is identical with aforementioned embodiments principle of work and most of structure, thus below only difference is described.This light guide plate 2 ' comprises a matrix 25 ', wherein, this matrix 25 ' further comprises a plane of incidence 20 ', a transmission face 21 ', an exit facet 22 ' and first side 24 ', second side 26 ' and the 3rd side 28 ', wherein, intersect in twos this first, second and third side 24 ', 26 ', 28 '.First side 24 ' comprises one first minute surface end 241, is positioned at the diagonal angle end that intersect first side 24 ' and second side 26 ', and the length of this first minute surface end 241 is about 10% of first side, 24 ' length.The 3rd side 28 ' comprises one second minute surface end 281, and it is positioned at the diagonal angle end that intersect the 3rd side 28 ' and second side 26 ', and the length of this second minute surface end 281 is about 10% of the 3rd side 28 ' length.
Please refer to Fig. 8 again, face photosystem 4 of the present invention comprises light guide plate 2, be positioned at the light source 41 of the light guide plate plane of incidence 20 1 sides, place the diffuser plate 43 and the prism plate 44 of light guide plate exit facet 22 1 sides, and wherein, diffuser plate 43 is between light guide plate 2 and prism plate 44.Diffuser plate 43 is to stamp tiny glass beads (figure does not show) by biend to make, and is used for and will be incident to the light scattering of diffuser plate 43.Prism plate 44 is to form the bar shaped microprism (indicating) that series of rules changes and make on its substrate, thereby its optical convergence that will disperse improves uniformity of light and briliancy.The light that is sent when light source 41 is assembled through prism plate 44 after diffuser plate 43 diffusions from the light that exit facet 22 penetrates when the plane of incidence 20 enters light guide plate 2 again, arrives a liquid crystal display (figure does not show) at last.Wherein, this light source 41 carries out mirror process, and plates anti-reflecting layer in the surface, thereby can realize the complete incident of energy of light source.
Claims (6)
1. surface light source system, it comprises: a light source is used for outgoing beam; One light guide plate is used to guide the light beam that light source sends, and wherein this light guide plate comprises: a plane of incidence, be used for receiving light beam from light source, and make it enter light guide plate by this plane of incidence; One exit facet is used for outgoing to import the light beam of this light guide plate inside by the plane of incidence; A plurality of sides are positioned at the side of this light guide plate exit facet; It is characterized in that these a plurality of sides are the atomizing side, be used for reflecting the light beam of these a plurality of sides of directive, make its directive light guide plate inside again.
2. surface light source system as claimed in claim 1 is characterized in that: these a plurality of sides link to each other with exit facet.
3. surface light source system as claimed in claim 2 is characterized in that: two to intersect one of them contiguous intersection, atomizing sides be the minute surface end.
4. surface light source system as claimed in claim 3 is characterized in that: this minute surface end length is 10% of its side, place.
5. surface light source system as claimed in claim 1 is characterized in that: this plane of incidence is coated with anti-reflective film.
6. surface light source system as claimed in claim 1 is characterized in that: this exit facet is coated with anti-reflective film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021496498A CN100357808C (en) | 2002-12-14 | 2002-12-14 | Area light source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021496498A CN100357808C (en) | 2002-12-14 | 2002-12-14 | Area light source system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1508600A CN1508600A (en) | 2004-06-30 |
| CN100357808C true CN100357808C (en) | 2007-12-26 |
Family
ID=34233727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021496498A Expired - Fee Related CN100357808C (en) | 2002-12-14 | 2002-12-14 | Area light source system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100357808C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10104429A (en) * | 1996-09-30 | 1998-04-24 | Konica Corp | Light guide plate and its manufacture |
| CN2292291Y (en) * | 1996-11-29 | 1998-09-23 | 台湾光宝电子股份有限公司 | Two-pole body scatted source board |
| CN1221123A (en) * | 1997-12-22 | 1999-06-30 | 三洋电机株式会社 | Light plate, surface light source and display device using the light plate |
| US20020005991A1 (en) * | 1995-12-28 | 2002-01-17 | Kayoko Masaki | Surface light source device of side light type |
| CN2508263Y (en) * | 2001-11-19 | 2002-08-28 | 宋义 | High-efficiency uniform white background light source and foreground light source |
-
2002
- 2002-12-14 CN CNB021496498A patent/CN100357808C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020005991A1 (en) * | 1995-12-28 | 2002-01-17 | Kayoko Masaki | Surface light source device of side light type |
| JPH10104429A (en) * | 1996-09-30 | 1998-04-24 | Konica Corp | Light guide plate and its manufacture |
| CN2292291Y (en) * | 1996-11-29 | 1998-09-23 | 台湾光宝电子股份有限公司 | Two-pole body scatted source board |
| CN1221123A (en) * | 1997-12-22 | 1999-06-30 | 三洋电机株式会社 | Light plate, surface light source and display device using the light plate |
| CN2508263Y (en) * | 2001-11-19 | 2002-08-28 | 宋义 | High-efficiency uniform white background light source and foreground light source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1508600A (en) | 2004-06-30 |
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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: 20071226 Termination date: 20151214 |
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| EXPY | Termination of patent right or utility model |