CN2594826Y - Background light device - Google Patents
Background light device Download PDFInfo
- Publication number
- CN2594826Y CN2594826Y CN 02250621 CN02250621U CN2594826Y CN 2594826 Y CN2594826 Y CN 2594826Y CN 02250621 CN02250621 CN 02250621 CN 02250621 U CN02250621 U CN 02250621U CN 2594826 Y CN2594826 Y CN 2594826Y
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- CN
- China
- Prior art keywords
- light
- lighting device
- back lighting
- guide plate
- combination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The utility model relates to a background light device without dark bands, which comprises at least a light source combination and a light guiding board, wherein, the light source combination comprise at least a light source; the light guiding board comprises a light incident surface for receiving light incident beams and a light outgoing surface for emitting the light beams; the light source combination is arranged corresponding to the light incident surface; the light incident surface presents a concave curve surface of which curvature is matched with the spatial distribution of the light outgoing energy of the light source combination corresponding to the light incident surface; the curvature of the light incident surface is matched with the spatial distribution of the light outgoing energy of the light source combination corresponding to the light incident surface; accordingly, the outgoing light of the light source combination can be diffused and angles of the light beams can be increased; consequently, the outgoing light of the light source combination can reach the whole light guiding board and the dark bands do not exist.
Description
[technical field]
The utility model relates to a kind of back lighting device that is used for flat-panel screens.
[background technology]
Because the liquid crystal itself in the LCD is not had a characteristics of luminescence, thereby, for reaching display effect, must provide a planar light source device to LCD, as back lighting device, its function is to provide briliancy fully and the area source that is evenly distributed for LCD.
Seeing also Fig. 1, is a kind of prior art back lighting device 1, and this back lighting device 1 comprises a combination of light sources 11 and a light guide plate 12.(LightEmitting Diode LED) (indicates) composition to this combination of light sources 11 by a plurality of light emitting diodes.This light guide plate 12 comprises an incidence surface 121 and an exiting surface 122, and this incidence surface 121 is the plane.Because of being certain space, the emergent light energy of each light emitting diode distributes (indicating), so the space distribution 13 of the emergent light energy of this combination of light sources 11 is that the space distribution of emergent light energy of each light emitting diode is superimposed.But the space distribution 13 of the emergent light energy of this combination of light sources 11 fails to cover whole light guide plate 12, promptly the zone that light can not arrive can occur in the light guide plate 12, also promptly has blanking bar 14.The existence of this blanking bar 14 will influence the whole optical property of back lighting device 1.
Another kind of prior art sees also No. the 98206129th, the Chinese patent (consulting Fig. 2) of bulletin on November 10th, 1999, and this back lighting device 2 comprises a combination of light sources 21 and a light guide plate 22.This combination of light sources 21 is made up of a plurality of light emitting diodes (not indicating), and this light guide plate 22 comprises an incidence surface 221 and an exiting surface 222.This incidence surface 221 comprises a plurality of U-lags (not indicating), and the corresponding placement with U-lag of this light emitting diode makes that the plane of incidence of each light emitting diode correspondence is a curved surface, and promptly the light inlet area increases.
Seeing also Fig. 3, is the emergent light energy distribution synoptic diagram of back lighting device 2 shown in Figure 2.The space distribution 23 of the emergent light energy of the superimposed formation combination of light sources 21 of space distribution of the emergent light energy of these a plurality of light emitting diodes, but, the space distribution 23 of the emergent light energy of this combination of light sources 21 also fails to cover whole light guide plate 22, promptly still has blanking bar 24.The existence of this blanking bar 24 will influence the whole optical property of back lighting device 2.
In sum, provide a kind of back lighting device that does not have a blanking bar very necessary.
[utility model content]
For overcoming the defective that there is blanking bar in the prior art back lighting device, the invention provides a kind of back lighting device that does not have blanking bar.
The technical scheme that technical solution problem of the present invention is adopted is: back lighting device of the present invention comprises an at least one combination of light sources and a light guide plate.This combination of light sources comprises at least one light source, this light guide plate comprises that at least one incidence surface that receives irradiating light beam and a usefulness are so that the exiting surface of light beam outgoing, this incidence surface is a concave curvatures, its curvature matches with the space distribution of the emergent light energy of respective sources combination, and this combination of light sources is corresponding to the incidence surface setting.
Compared with prior art, the incidence surface of the light guide plate that back lighting device of the present invention adopts is a concave curvatures, the curvature of this incidence surface matches with the space distribution of the emergent light energy of corresponding light source combination, but the emergent light of diffused light source combination, increase beam angle, thereby make the emergent light of combination of light sources can arrive whole light guide plate, promptly do not have blanking bar and exist.
[description of drawings]
Fig. 1 is a kind of emergent light energy distribution synoptic diagram of prior art back lighting device.
Fig. 2 is the stereographic map of another kind of prior art back lighting device.
Fig. 3 is the emergent light energy distribution synoptic diagram of back lighting device shown in Figure 2.
Fig. 4 is the cut-open view of the utility model back lighting device first embodiment.
Fig. 5 is the emergent light energy distribution synoptic diagram of back lighting device shown in Figure 4.
Fig. 6 is the stereographic map of the utility model back lighting device second embodiment.
Fig. 7 is the cut-open view of the utility model back lighting device the 3rd embodiment.
Fig. 8 puts the stereographic map of the 4th embodiment for the utility model mould backlight.
[embodiment]
Seeing also Fig. 4, is first embodiment of the utility model back lighting device.This back lighting device 3 comprises a combination of light sources 31 and a light guide plate 32, this combination of light sources 31 is made up of a plurality of light emitting diodes (not indicating), this light guide plate 32 is plate shaped, comprise an incidence surface 321 and an exiting surface 322, this incidence surface 321 is concave curvatures, and this combination of light sources 31 is positioned at this incidence surface 321 1 sides.
Seeing also Fig. 5, is the emergent light energy distribution synoptic diagram of back lighting device 3.Because of the incidence surface 321 of this light guide plate 32 is concave curvatures, its curvature matches with the space distribution 33 of the emergent light energy of this combination of light sources 31, but the emergent light of diffused light source combination 31, increase beam angle, thereby make the emergent light of combination of light sources 31 can arrive whole light guide plate 32, promptly do not have blanking bar and exist.
Seeing also Fig. 6, is second embodiment of the utility model back lighting device.This back lighting device 4 comprises a combination of light sources 41 and a light guide plate 42, this combination of light sources 41 is made up of a plurality of light emitting diodes (not indicating), this light guide plate 42 is wedge shapes, comprise an incidence surface 421 and an exiting surface 422, this incidence surface 421 is concave curvatures, its curvature matches with the space distribution (figure does not show) of the emergent light energy of this combination of light sources 41, and this combination of light sources 41 is positioned at this incidence surface 421 1 sides.The space distribution that goes out with luminous energy of the curvature of this incidence surface 421 and this combination of light sources 41 matches, but the emergent light of diffused light source combination 41 increase beam angle, thereby make the emergent light of combination of light sources 41 can arrive whole light guide plate 42, promptly do not have blanking bar and exist.
Seeing also Fig. 7, is the 3rd embodiment of the utility model back lighting device.This back lighting device 5 comprises a combination of light sources 51, a light guide plate 52, a diffuser plate 56 and a blast sheet 57.This combination of light sources 51 comprises a plurality of pointolites (not indicating), and this light guide plate 52 comprises an incidence surface 521 and an exiting surface 522, and this incidence surface 521 is oppositely arranged with exiting surface 522.This incidence surface 521 is concave curvatures, and this combination of light sources 51 is positioned at this incidence surface 521 1 sides, and this blast sheet 57 is positioned at exiting surface 522 1 sides, and this diffuser plate 56 is between light guide plate 52 and blast sheet 57.The curvature of this incidence surface 521 matches with the space distribution (figure does not show) of the emergent light energy of this combination of light sources 51, but the emergent light of diffused light source combination 51, increase beam angle, thereby make the emergent light of combination of light sources 51 can arrive whole light guide plate 52, promptly do not have blanking bar and exist.
Seeing also Fig. 8, is the utility model back lighting device the 4th embodiment.This back lighting device 6 comprises a combination of light sources 61, a light guide plate 62, a reflecting plate 65, a diffuser plate 66 and a blast sheet 67.This combination of light sources 61 comprises a plurality of pointolites (not indicating), and this light guide plate 62 comprises an incidence surface 621, an exiting surface 622 and a bottom surface 623.This incidence surface 621 and these exiting surface 621 adjacent settings, this exiting surface 622 is oppositely arranged with this bottom surface 623.This incidence surface 621 is concave curvatures, and this combination of light sources 61 is positioned at this incidence surface 621 1 sides, and this reflecting plate 65 is positioned at bottom surface 623 1 sides, and this blast sheet 67 is positioned at exiting surface 622 1 sides, and this diffuser plate 66 is between light guide plate 62 and blast sheet 67.The curvature of this incidence surface 621 matches with the space distribution (figure does not show) of the emergent light energy of this combination of light sources 61, but the emergent light of diffused light source combination 61, increase beam angle, thereby make the emergent light of combination of light sources 61 can arrive whole light guide plate 62, promptly do not have blanking bar and exist.
In addition, the utility model back lighting device is not limited to the description of above-mentioned embodiment.As, this blast sheet can be prism combination; The light source that this combination of light sources adopted can be line source; The incidence surface of this light guide plate is the concave cylindrical curved surface; This light guide plate can comprise a plurality of incidence surfaces, and this combination of light sources is provided with corresponding to a plurality of incidence surfaces etc.
Claims (10)
1. back lighting device, it comprises: an at least one combination of light sources and a light guide plate, this combination of light sources comprises at least one light source, this light guide plate comprises that at least one incidence surface that receives irradiating light beam and a usefulness are so that the exiting surface of light beam outgoing, this combination of light sources is corresponding to the incidence surface setting, the incidence surface that it is characterized in that this light guide plate is a concave curvatures, and its curvature matches with the space distribution of the emergent light energy of this combination of light sources.
2. back lighting device as claimed in claim 1 is characterized in that this light guide plate is a wedge shape or plate shaped.
3. back lighting device as claimed in claim 1, the light source that it is characterized in that this combination of light sources is pointolite or line source.
4. back lighting device as claimed in claim 1 is characterized in that the incidence surface of this light guide plate and exiting surface are oppositely arranged.
5. back lighting device as claimed in claim 1 is characterized in that the adjacent setting with exiting surface of incidence surface of this light guide plate.
6. back lighting device as claimed in claim 5 is characterized in that this light guide plate further comprises a bottom surface, and this bottom surface and exiting surface are oppositely arranged.
7. back lighting device as claimed in claim 6 is characterized in that this back lighting device further comprises a reflecting plate, and this reflecting plate is arranged on bottom surface one side of light guide plate.
8. back lighting device as claimed in claim 1, the incidence surface that it is characterized in that this light guide plate are the concave cylindrical curved surfaces.
9. back lighting device as claimed in claim 1 is characterized in that this back lighting device further comprises a blast sheet, and this blast sheet is prism combination, and it is arranged on exiting surface one side of light guide plate.
10. back lighting device as claimed in claim 1 is characterized in that this back lighting device further comprises a diffusion sheet, and this diffusion sheet is arranged on exiting surface one side of light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02250621 CN2594826Y (en) | 2002-12-21 | 2002-12-21 | Background light device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02250621 CN2594826Y (en) | 2002-12-21 | 2002-12-21 | Background light device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2594826Y true CN2594826Y (en) | 2003-12-24 |
Family
ID=33720795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02250621 Expired - Lifetime CN2594826Y (en) | 2002-12-21 | 2002-12-21 | Background light device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2594826Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460949C (en) * | 2004-07-16 | 2009-02-11 | 恩普乐股份有限公司 | Surface light source device, illumination unit and light flux control member |
| CN100465724C (en) * | 2004-10-12 | 2009-03-04 | 三星电子株式会社 | Light illuminating unit and liquid crystal display device having the same |
| CN101526177B (en) * | 2008-03-05 | 2013-05-01 | 恩普乐股份有限公司 | Emission device, surface light source device and display |
| CN108613095A (en) * | 2017-01-03 | 2018-10-02 | 联嘉光电股份有限公司 | Light emitting device and vehicle-mounted light emitting device |
-
2002
- 2002-12-21 CN CN 02250621 patent/CN2594826Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460949C (en) * | 2004-07-16 | 2009-02-11 | 恩普乐股份有限公司 | Surface light source device, illumination unit and light flux control member |
| CN100465724C (en) * | 2004-10-12 | 2009-03-04 | 三星电子株式会社 | Light illuminating unit and liquid crystal display device having the same |
| CN101526177B (en) * | 2008-03-05 | 2013-05-01 | 恩普乐股份有限公司 | Emission device, surface light source device and display |
| CN108613095A (en) * | 2017-01-03 | 2018-10-02 | 联嘉光电股份有限公司 | Light emitting device and vehicle-mounted light emitting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121221 Granted publication date: 20031224 |