CN1661438A - Back light module - Google Patents
Back light module Download PDFInfo
- Publication number
- CN1661438A CN1661438A CN 200410015532 CN200410015532A CN1661438A CN 1661438 A CN1661438 A CN 1661438A CN 200410015532 CN200410015532 CN 200410015532 CN 200410015532 A CN200410015532 A CN 200410015532A CN 1661438 A CN1661438 A CN 1661438A
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- China
- Prior art keywords
- light
- guide plate
- light guide
- reflector plate
- plate
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Abstract
The present invention discloses a backlight module, including a light-conducting plate and a ponit light source device. Said point light source device includes a point light source, a said light conducting plate includes a light-entering surface. It is characterized by that said point light source device includes a reflector. Said reflector is placed opposite to said light-entering surface, and said point light source device is placed at one side of reflector opposite to said light-conducting plate, the light sent by said point light source device can be reflected by reflector, then entered into light-conducting plate from light-entering surface.
Description
[technical field]
The invention relates to a kind of module backlight, particularly a kind of employing light emitting diode (Light Emitting Diode, LED) module backlight of light source.
[background technology]
The advantage that operating voltage is low, luminosity is high, response speed is fast because light emitting diode has, the life-span is long makes in its module backlight that is widely used in mobile phone, PDA (Personal Digital Assistant, personal digital assistant), display.Yet, the emergent light of light emitting diode has stronger optical directability, and promptly emergent light has certain dispersion angle, when it directly injects the light guide plate of module backlight, make light guide plate incidence surface one side occur the optics dark space easily, be not easy to obtain light inlet uniformity coefficient preferably.The light source of the module backlight that mobile phone is used generally adopts Two above light emitting diode at least, design of backlight module on the market is based on three light emitting diodes at present, and light emitting diode is the higher part of cost in the module backlight, now producer has by reducing the light emitting diode number and reduces cost, but when reducing the light emitting diode number, module integral brightness backlight is descended, or produce the situation that module light-emitting uniformity backlight declines to a great extent.
The floor map and the schematic perspective view of a kind of prior art module backlight, respectively as depicted in figs. 1 and 2, this module 10 backlight comprises light source 12 and light guide plate 13, and light guide plate 13 comprises an incidence surface 131, one exiting surface 132 that links to each other with incidence surface 131, and and exiting surface 132 opposed bottom surface 133.Light source 12 is that the incidence surface 131 of relative light guide plate 13 is provided with, and this light source 12 is a plurality of light emitting diodes, and the outgoing beam of these a plurality of light emitting diodes reflects in light guide plate 13 after entering light guide plate 13 by the incidence surface 131 of light guide plate 13.These light guide plate 13 guiding light sources 12 send the transmission direction of light beam, and convert thereof into exiting surface 132 outgoing of planar light from light guide plate 13.Yet, because the emergent light of light emitting diode has certain angle of divergence, make incidence surface 131 1 sides of light guide plate 13 optics dark space 15 occur, this optics dark space 15 mainly is distributed between two adjacent light emitting diodes, influences the briliancy and the light-emitting uniformity of module 10 backlight.
The lighting angle that improves light emitting diode can reduce above-mentioned optics dark space 15, thereby improves the light inlet uniformity coefficient of module 10 backlight.Yet the lighting angle of light emitting diode is subjected to the design of itself and the restriction of processing procedure, and its finished product lighting angle is unadjustable, and real in the practice is inconvenience.
[summary of the invention]
For the module backlight that overcomes prior art optics dark space and the high problem of cost occur in light guide plate incidence surface one side, the invention provides a kind of optics dark space and module backlight cheaply avoided.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of module backlight is provided, it comprises a light guide plate and a light supply apparatus, this light supply apparatus comprises a light source and a reflector plate, the light source of this light supply apparatus is a single light emitting diode, the reflector plate of this light supply apparatus is a concave curved surface shape, this light guide plate and this reflector plate at grade, this light source is positioned at a side on this light guide plate and this plane, reflector plate place, and with this reflector plate monoclinic phase to being provided with.
Compared to prior art,, can reduce the cost of module backlight because the light source design of module backlight of the present invention is a single light emitting diode; This single light emitting diode is positioned at a side of the relative light guide plate of reflector plate, the emergent light of this light source exposes to reflector plate earlier, divergent beams that will this single light emitting diode through reflector plate convert the incidence surface that parallel beam incides light guide plate to, avoid light guide plate incidence surface one side the optics dark space to occur.
[description of drawings]
Fig. 1 is a prior art module floor map backlight.
Fig. 2 is a prior art module schematic perspective view backlight.
Fig. 3 is the present invention's module first embodiment schematic perspective view backlight.
Fig. 4 is the present invention's module first embodiment light path synoptic diagram backlight.
Fig. 5 is the present invention's module second embodiment vertical view backlight.
Fig. 6 is the present invention's module second embodiment light path synoptic diagram backlight.
[embodiment]
Seeing also Fig. 3 and Fig. 4, is respectively the stereographic map and the light path synoptic diagram of first embodiment of the present invention's module backlight.This module 100 backlight comprises a light supply apparatus 110, one light guide plate 120, one reflecting plates, 130, one diffuser plates 140 and prism plates 150.This reflecting plate 130, light guide plate 120, diffuser plate 140 and prism plate 150 are placed successively.This light supply apparatus 110 comprises that a light source 111 reaches and the right reflector plate 112 of its monoclinic phase, and these reflector plate 112 materials are silver.This light supply apparatus 110 is to be used for sending light beam, and the transmission direction that these light guide plate 120 these light sources 110 of guiding send light beam converts thereof into area source through diffuser plate 140 outgoing.Side from this module 100 backlight is watched, and the section of this reflector plate 112 is concave curved surface shapes, and its concave curved surface is towards light guide plate 120.
Exiting surface 122 and and exiting surface 122 opposed bottom surface 123 that this light guide plate 120 comprises an incidence surface 121, links to each other with incidence surface 121.This incidence surface 121 is used for receiving the light beam that light supply apparatus 110 sends in the face of the concave curved surface of this reflector plate 112.
Because light source 111 designs of module 100 backlight of the present invention are single light emitting diodes, can reduce the cost of module 100 backlight; This single light emitting diode is positioned at a side of reflector plate 112 relative light guide plate 120, the emergent light of this light source 111 exposes to reflector plate 112 earlier, divergent beams that will this single light emitting diode through reflector plate 112 convert the incidence surface 121 that parallel beam incides light guide plate 120 to, avoid incidence surface 121 1 sides of light guide plate 120 the optics dark space to occur.
Seeing also Fig. 5, is the vertical view of second embodiment of the present invention's module backlight.This module 200 backlight comprises a light supply apparatus 210, one light guide plate 220, this light supply apparatus 210 comprises a light source 211 and a reflector plate 212, this light source 211 is single light emitting diodes, is arranged at a side on plane, reflector plate 212 relative light guide plate 220 place, can be positioned at this below, plane, these reflector plate 212 materials are silver, be the circular arc that is wound into by the flat reflective sheet, these module 200 light guide plate backlight and reflector plate place in-plane are watched certainly, and the section of this reflector plate 212 promptly is one section circular shape.
Seeing also Fig. 6, is the light path synoptic diagram of second embodiment of the present invention's module backlight.Exiting surface 222 and and exiting surface 222 opposed bottom surface 223 that this light guide plate 220 comprises an incidence surface 221, links to each other with incidence surface 221.This reflector plate 212 is to light source 211 lopsidedness, the requirement that the light that shines reflector plate 212 by light source 211 can reflex to the incidence surface 221 of this light guide plate 220 is fully satisfied at the angle of inclination, this incidence surface 221 is used for receiving the light beam that light supply apparatus 210 sends in the face of the concave curved surface of this reflector plate 212.
These light source 211 emergent lights, expose to earlier on the reflector plate 212, reflection through reflector plate 212, project in the light guide plate 220, can enlarge the light area of incidence surface 221 parts of light guide plate 220, therefore avoid the appearance of the incidence surface 221 1 sidelights dark space of light guide plate 220, improve the uniformity coefficient that incides light guide plate 120 light, and then improve the outgoing light homogeneity of light guide plate 120.
Because the light source 211 of module 200 backlight of the present invention can be a single light emitting diode, can reduce the cost of module 200 backlight; This single light emitting diode is positioned at the below of the relative light guide plate of reflector plate, the emergent light of this light source 211 exposes to this reflector plate 212 earlier, process reflector plate 212 converts the divergent beams of this light source 211 to incidence surface 221 that parallel beam incides light guide plate 220, avoids incidence surface 221 1 sides of light guide plate 220 the optics dark space to occur.
Claims (8)
1. module backlight, comprise a light guide plate and a spotlight source device, this spotlight source device comprises a pointolite, this light guide plate comprises an incidence surface, it is characterized in that: this spotlight source device comprises a reflector plate, this reflector plate is provided with respect to this incidence surface, and this pointolite is arranged at a side of the relative light guide plate of reflector plate, and its light that sends enters light guide plate by incidence surface after the reflector plate reflection.
2. module backlight as claimed in claim 1 is characterized in that: this light guide plate and this reflector plate are at grade.
3. module backlight as claimed in claim 1 is characterized in that: this pointolite is positioned at below, the relative light guide plate of this reflector plate plane.
4. module backlight as claimed in claim 1 is characterized in that: this pointolite is between this reflector plate and this incidence surface.
5. module backlight as claimed in claim 1 is characterized in that: this reflector plate is a concave curved surface shape.
6. module backlight as claimed in claim 4 is characterized in that: this reflector plate is a circular shape.
7. module backlight as claimed in claim 1 is characterized in that: this reflector plate material is a silver.
8. module backlight as claimed in claim 1 is characterized in that: this pointolite is a single light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100155329A CN100426074C (en) | 2004-02-27 | 2004-02-27 | Back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100155329A CN100426074C (en) | 2004-02-27 | 2004-02-27 | Back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1661438A true CN1661438A (en) | 2005-08-31 |
| CN100426074C CN100426074C (en) | 2008-10-15 |
Family
ID=35010840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100155329A Expired - Fee Related CN100426074C (en) | 2004-02-27 | 2004-02-27 | Back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100426074C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955092A (en) * | 2014-04-15 | 2014-07-30 | 京东方科技集团股份有限公司 | Backlight module and display panel |
| CN108022520A (en) * | 2016-10-28 | 2018-05-11 | 三星电子株式会社 | Display device |
| CN108776410A (en) * | 2018-06-15 | 2018-11-09 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| WO2020220167A1 (en) * | 2019-04-28 | 2020-11-05 | 深圳市汇顶科技股份有限公司 | Backlight module and display apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679120B2 (en) * | 1988-08-06 | 1994-10-05 | 三菱電機株式会社 | Surface emitting device |
| JP2000137218A (en) * | 1998-10-29 | 2000-05-16 | Kenwood Corp | Lcd back light structure |
| JP2000221502A (en) * | 1999-02-01 | 2000-08-11 | Matsushita Electric Ind Co Ltd | Back light for liquid crystal |
| JP2001006417A (en) * | 1999-06-23 | 2001-01-12 | Sanyo Electric Co Ltd | Surface light source device, light guide plate and display device |
| JP2002139731A (en) * | 2000-10-31 | 2002-05-17 | Optrex Corp | Backlight of liquid crystal display panel |
| JP2004055430A (en) * | 2002-07-23 | 2004-02-19 | Kawaguchiko Seimitsu Co Ltd | Back light system |
-
2004
- 2004-02-27 CN CNB2004100155329A patent/CN100426074C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955092A (en) * | 2014-04-15 | 2014-07-30 | 京东方科技集团股份有限公司 | Backlight module and display panel |
| CN108022520A (en) * | 2016-10-28 | 2018-05-11 | 三星电子株式会社 | Display device |
| CN108776410A (en) * | 2018-06-15 | 2018-11-09 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN108776410B (en) * | 2018-06-15 | 2020-07-28 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| WO2020220167A1 (en) * | 2019-04-28 | 2020-11-05 | 深圳市汇顶科技股份有限公司 | Backlight module and display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100426074C (en) | 2008-10-15 |
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| 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: 20081015 Termination date: 20150227 |
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| EXPY | Termination of patent right or utility model |