CN2630892Y - LED area source - Google Patents
LED area source Download PDFInfo
- Publication number
- CN2630892Y CN2630892Y CNU032265182U CN03226518U CN2630892Y CN 2630892 Y CN2630892 Y CN 2630892Y CN U032265182 U CNU032265182 U CN U032265182U CN 03226518 U CN03226518 U CN 03226518U CN 2630892 Y CN2630892 Y CN 2630892Y
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- CN
- China
- Prior art keywords
- light
- light source
- guide plate
- light guide
- led surface
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- Expired - Lifetime
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- Light Guides In General And Applications Therefor (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
Abstract
The utility model relates to a surface light source with the light-emitting diodes for the flat panel display, including a light-guiding plate and the light-emitting diodes. The light-guiding plate includes two incident surfaces that are arranged relatively, an exit surface that is close to the incident surfaces and a bottom surface that is relative to the exit surface. The two light-emitting diodes are arranged on the one side of the incident surface, and the surface light source with the light-emitting diodes also includes two reflective films and two light-increasing films that are arranged on the light-input surface of the light-guiding plate. These two reflective films are arranged on the one side of the light-input surface of the light-guiding plate and form a cavity with these two light-increasing films respectively. And the two light-emitting diodes are arranged in the cavity shows central symmetry.
Description
[technical field]
The utility model relates to the area source that a kind of flat-panel screens is used, and relates in particular to a kind of LED surface light source.
[background technology]
Because the liquid crystal itself in the panel of LCD is not had a characteristics of luminescence, reach display effect, one planar light source device is provided must for the LCD panel, as backlight or front light-source, its function is to provide the planar light that briliancy is abundant and be evenly distributed to panel of LCD.
The tradition area source mainly is made up of light source, light guide plate, reflecting plate, diffuser plate and prism plate etc.Wherein, this light source can be arranged on light guide plate one side or two opposite sides and with light emission to this light guide plate.The effect of this light guide plate is the transmission direction of direct light line, makes light by the even outgoing of the exiting surface of light guide plate.Because the light that light source sends enters from the light guide plate side, therefore light guide plate is luminous brighter near the part of light source, and luminous darker away from the part of light source, so for increasing the briliancy and the uniformity coefficient of light guide plate, the exiting surface in light guide plate is provided with V-shaped groove or spreads the site at its bottom surface configuration light usually.When light transmission spreads the site to light, reflection and scattering will take place in light, and to each different directions transmission, finally the exiting surface by light guide plate penetrates.Utilize various densitys, the V-shaped groove that varies in size or light diffusion site, can make light guide plate luminous more even.
See also Fig. 1, a kind of prior art planar light source device 10 comprises a light guide plate 120 and the line source 110 that is arranged on these light guide plate 120 1 sides.Yet, since the briliancy of line source 110 be distributed in two ends a little less than, the middle part is stronger, makes the two ends Jiao Chu of light guide plate 120 adjacent threads light sources 110 have dark space 130 and occurs, and influences the uniformity coefficient and the briliancy of light guide plate 120 emergent lights.
See also Fig. 2, the LED source 210 and that the planar light source device 20 of another kind of prior art comprises a light guide plate 220, be arranged on light guide plate 220 1 sides is arranged on the reflecting plate (figure does not show) of these light guide plate 220 bottom surfaces.LED source 210 enters in the light guide plate 220 with the light that certain lighting angle (maximum luminous angle is 130 degree) sends.Yet it is also inhomogeneous that light enters the light energy distribution of light guide plate 220, wherein forms dark space 230 at contiguous light source 210 and the outer subregion that is positioned at lighting angle, and its briliancy is minimum, influences light guide plate 220 outgoing uniformity of light and briliancy.
The general method that improves light guide plate bright dipping briliancy elimination dark space reduces the light-emitting diodes tube pitch to make luminous energy contain whole viewing area for increasing the light emitting diode number, but can increase the cost of planar light source device.
Another kind of solution is that the distance change ambassador luminous energy of light emitting diode and light guide plate is contained whole viewing area, but can increase the volume of planar light source device.
[utility model content]
Have dark space and light defective pockety in light guide plate in order to overcome the prior art LED surface light source, the utility model provides a kind of LED surface light source that dark space and light are evenly distributed of eliminating in light guide plate.
The technical scheme that the utility model technical solution problem is adopted is: a LED surface light source is provided, it comprises a light guide plate and two light emitting diodes, this light guide plate comprises two relative incidence surfaces, one exiting surface adjacent and one and this exiting surface opposed bottom surface with this incidence surface, wherein this two light emitting diode is positioned at a side of corresponding incidence surface, this LED surface light source also comprises two reflector plates and two light increasing elements, these two light increasing elements are positioned at the optical input surface place of this light guide plate, these two reflector plates are positioned at optical input surface one side of this light guide plate, it folds with these two brightening pieces respectively and forms two cavitys, and this two light emitting diode is centrosymmetric and is separately positioned in this two cavity.
Wherein this light increasing element can be brightening piece or on this incidence surface V-shaped groove is set.
Compared with prior art, the beneficial effects of the utility model are: because this light emitting diode is arranged in the cavity that this light increasing element and reflector plate fold, and this reflector plate is arranged on a side of the incidence surface of this light guide plate with certain angle of inclination, therefore its distributions was more even when light incident repeatedly reflexed to brightening piece through reflector plate, and then the elimination dark space.
[description of drawings]
Fig. 1 is the floor map of prior art planar light source device.
Fig. 2 is the floor map of another prior art planar light source device.
Fig. 3 is the stereographic map of the utility model LED surface light source first embodiment.
Fig. 4 is the sectional view of Fig. 3 along the IV-IV direction.
Fig. 5 is the sectional view of the utility model LED surface light source second embodiment.
Fig. 6 is the sectional view of the utility model LED surface light source the 3rd embodiment.
Fig. 7 is the sectional view of the utility model LED surface light source the 4th embodiment.
Fig. 8 is the sectional view of the utility model LED surface light source the 5th embodiment.
Fig. 9 is the schematic perspective view of the utility model LED surface light source the 6th embodiment.
[embodiment]
Please consulting Fig. 3 and Fig. 4 together, is first embodiment of the utility model LED surface light source, and wherein Fig. 3 is the stereographic map of the utility model LED surface light source first embodiment, and Fig. 4 is the sectional view of Fig. 3 along the IV-IV direction.This LED surface light source 2 comprises a light guide plate 21, a brightening piece 22, a reflector plate 23 and a light emitting diode 24.Wherein, this light guide plate 21 is a wedge shape, this brightening piece 22 is attached on the incidence surface 211 of this light guide plate 21, this reflector plate 23 is a groove structure, it links to each other with this brightening piece 22, the two folds and forms a cavity 25, and this cavity 25 is in order to holding this light emitting diode 24, and transmission light emitting diode 24 issued light lines.This light emitting diode 24 is arranged on this cavity 25 tops, its issued light line after reflector plate 23 reflection, round-trip transmission cavity 25 in, this brightening piece 22 receives the light that reflects from light emitting diode 24 and reflector plate 23, and it is imported in this light guide plate 21.
The exiting surface 213 of this light guide plate 21 can be provided with V-shaped groove to strengthen the briliancy of emergent light, and this V-shaped groove also can be other shapes such as trapezoidal, circular-arc; The bottom surface 212 of this light guide plate 21 can be provided with light diffuser screen lattice array (figure does not show) so that light transmits to different directions in light guide plate 21, even emergent ray is more even.Each site can be shapes such as microprism shape, point-like, square, spherical shape, cylindric, square or pyramid in this light diffuser screen lattice array, and wherein the Density Distribution of scattering point is to increase progressively arrangement along the direction away from this incidence surface 211.
For further improving bright dipping briliancy and distribution of light uniformity coefficient, reflector plate 23 is not parallel with the incidence surface 211 of this light guide plate 21, there is an angle in it, therefore its distributions was more even when light incided brightening piece 22, and then improved the light uniformity coefficient that enters light guide plate 21, and may there be various angles in the light that is reflected owing to reflector plate 23, can reduce briliancy, therefore design the incidence surface 211 that a brightening piece 22 is attached to this light guide plate 21, light is concentrated imported in the light guide plate 21, to increase the bright dipping briliancy.
This light guide plate 21 is to make with transparent material such as acryl resin, polycarbonate, polyvinyl resin or glass etc.This reflector plate 23 can adopt high light reflectivity rate material, also reflectance coating directly can be plated thereon, and the diverse location of reflector plate 23 also can be laid the different site of density, to strengthen light reflection and scattering degree, makes distribution of light more even.
See also Fig. 5, it is the structural representation of LED surface light source second embodiment of the present invention, itself and the first embodiment difference are that this LED surface light source 9 comprises plate light guide plate 91, two brightening pieces 92, two reflector plates 93 and two light emitting diodes 94, wherein these two reflector plates, 93 inverted configuration are arranged at a side of this two brightening piece 92, this two light emitting diode 24 is arranged at cavity 95 bigger ends of this brightening piece 92 and reflector plate 93 formation, and this cavity 95 is with respect to these light guide plate 91 center symmetries, be that light emitting diode 94 is that the opposite flank that is respectively adjacent to this light guide plate 91 is provided with, therefore can improve the bright dipping briliancy, and, make bright dipping more even in two directional compensation dark spaces.
Third and fourth of the utility model LED surface light source, five, six embodiments all are architecture advances of doing about reflector plate, and because of its structure difference, the light guide effect of being reached is difference to some extent also.
The 3rd embodiment of the utility model LED surface light source as shown in Figure 6, this LED surface light source 3 comprises a light guide plate 31, a brightening piece 32, a reflector plate 33 and a light emitting diode 34.Wherein, the end 331 of the side (indicating) that this reflector plate 33 and brightening piece 31 are relative is an arc, compares with the plate shaped of first embodiment, and its reflection ray effect is better.
The 4th embodiment of the utility model LED surface light source as shown in Figure 7, this LED surface light source 4 comprises a light guide plate 41, a brightening piece 42, a reflector plate 43 and a light emitting diode 44.Wherein, this reflector plate 43 and brightening piece 42 relative sides (indicating) are arc.
The 5th embodiment of the utility model LED surface light source as shown in Figure 8, this LED surface light source 5 comprises a light guide plate 51, a brightening piece 52, a reflector plate 53 and a light emitting diode 54.Wherein, the reflective surface 531 of this reflector plate 53 is provided with V-shaped groove, is beneficial to reflectively, makes distribution of light even.
The 6th embodiment of the utility model LED surface light source as shown in Figure 9, this LED surface light source 6 comprises a light guide plate 61, a brightening piece 62, a reflector plate 63 and a light emitting diode 64 (figure do not show).Wherein, this reflector plate 63 is an arc groove.
In addition, for reducing the element and the cost of LED surface light source 2,9, V-shaped groove can be set on the incidence surface 211,911 of light guide plate 21,91 substitute brightening piece 22,92, that this V-shaped groove also can be is trapezoidal, circular-arc, ellipticity etc. can produce the different shape of light harvesting function.Wherein this V-shaped groove can with method manufacturings such as light guide plate 21,91 one ejection formations, also available chemical etching texture method, laser direct-writing method, precision optical machinery processing method.
Claims (10)
1. LED surface light source, it comprises a light guide plate and two light emitting diodes, this light guide plate comprises two relative incidence surfaces, one exiting surface adjacent and one and this exiting surface opposed bottom surface with this incidence surface, wherein this two light emitting diode is positioned at a side of corresponding incidence surface, it is characterized in that: this LED surface light source also comprises two reflector plates and two light increasing elements, these two light increasing elements are arranged on the incidence surface place of this light guide plate, these two reflector plates are arranged on optical input surface one side of this light guide plate, it folds with these two brightening pieces respectively and forms two cavitys, and this two light emitting diode is centrosymmetric and is separately positioned in this two cavity.
2. LED surface light source as claimed in claim 1 is characterized in that: each cavity has a bigger end in this two cavity, and this two light emitting diode is housed in this bigger end place respectively.
3. LED surface light source as claimed in claim 1 is characterized in that: this light increasing element is a brightening piece, and it is attached at this corresponding incidence surface place.
4. LED surface light source as claimed in claim 1 is characterized in that: this light increasing element is arranged on the V-shaped groove of the incidence surface of this light guide plate.
5. LED surface light source as claimed in claim 1 is characterized in that: this light emitting diode is arranged at this bigger end place.
6. LED surface light source as claimed in claim 1 is characterized in that: this reflector plate is a groove shape.
7. LED surface light source as claimed in claim 6 is characterized in that: the end of the side that this reflector plate is relative with this light increasing element is an arc.
8. LED surface light source as claimed in claim 6 is characterized in that: the side that this reflector plate is relative with this light increasing element is an arc.
9. LED surface light source as claimed in claim 1 is characterized in that: this reflector plate is provided with V-shaped groove.
10. LED surface light source as claimed in claim 1 is characterized in that: this reflector plate is provided with the site.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032265182U CN2630892Y (en) | 2003-05-24 | 2003-05-24 | LED area source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032265182U CN2630892Y (en) | 2003-05-24 | 2003-05-24 | LED area source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2630892Y true CN2630892Y (en) | 2004-08-04 |
Family
ID=34290856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032265182U Expired - Lifetime CN2630892Y (en) | 2003-05-24 | 2003-05-24 | LED area source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2630892Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323693A (en) * | 2011-10-14 | 2012-01-18 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module thereof |
| CN104279462A (en) * | 2014-09-18 | 2015-01-14 | 合肥鑫晟光电科技有限公司 | Backlight source and display device |
| CN104456425A (en) * | 2013-09-13 | 2015-03-25 | 扬升照明股份有限公司 | Planar light source |
| CN105957947A (en) * | 2016-05-16 | 2016-09-21 | 漳州立达信光电子科技有限公司 | LED area light source and preparation method thereof |
-
2003
- 2003-05-24 CN CNU032265182U patent/CN2630892Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323693A (en) * | 2011-10-14 | 2012-01-18 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module thereof |
| WO2013053157A1 (en) * | 2011-10-14 | 2013-04-18 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module thereof |
| CN104456425A (en) * | 2013-09-13 | 2015-03-25 | 扬升照明股份有限公司 | Planar light source |
| CN104279462A (en) * | 2014-09-18 | 2015-01-14 | 合肥鑫晟光电科技有限公司 | Backlight source and display device |
| CN104279462B (en) * | 2014-09-18 | 2017-02-01 | 合肥鑫晟光电科技有限公司 | Backlight source and display device |
| CN105957947A (en) * | 2016-05-16 | 2016-09-21 | 漳州立达信光电子科技有限公司 | LED area light source and preparation method thereof |
| CN105957947B (en) * | 2016-05-16 | 2019-01-18 | 漳州立达信光电子科技有限公司 | LED area light source and preparation method thereof |
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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: 20130524 Granted publication date: 20040804 |