CN2624238Y - Area light source for LED - Google Patents
Area light source for LED Download PDFInfo
- Publication number
- CN2624238Y CN2624238Y CNU032261128U CN03226112U CN2624238Y CN 2624238 Y CN2624238 Y CN 2624238Y CN U032261128 U CNU032261128 U CN U032261128U CN 03226112 U CN03226112 U CN 03226112U CN 2624238 Y CN2624238 Y CN 2624238Y
- Authority
- CN
- China
- Prior art keywords
- light
- light source
- guide plate
- light guide
- led surface
- 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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Abstract
The utility model relates to a light emitting diode surface light source with a small volume, evenly arranged light and relatively high light utilizing rate. The utility model comprises a light conducting plate, twp light reinforcing plates, two reflecting sheets and two light emitting diodes; wherein, the two light reinforcing sheets are respectively affixed onto the two opposing sidewalls of the light conducting plates. The two reflecting sheets are respectively arranged on the two opposing sidewalls of the light conducting plate. The two reflecting sheets and the two light reinforcing plates are clamped to form two hollow bodies, which is used for holding the two light emitting diodes.
Description
[technical field]
The utility model relates to a kind of area source that is applied to LCD, especially relates 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, therefore, for reaching display effect, a planar light source device is provided 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.
On January 7th, 2003, the United States Patent (USP) of bulletin disclosed in a kind of LED surface light source for the 6th, 502, No. 948.Please consult Fig. 1 and Fig. 2 together, this LED surface light source 1 comprises the leaded light bar 18 that is reflected a light guide plate 12, a prism plate 17, a reflecting plate 13, a substrate 14, two 15,16 and one of light emitting diodes plate 13 surrounds.Wherein, this prism plate 17 is positioned at this light guide plate 12 upper surfaces, and this light emitting diode 15,16 is positioned at leaded light bar 18 both sides, after its light of launching is injected leaded light bar 18, be reflected plate 13 reflection and enter light guide plate 12, and finally enter prism plate 17 by the upper surface of light guide plate 12 and penetrate.
The LED surface light source 1 that this patent disclosed, its the Lights section is made of two light emitting diodes 15,16, thereby it is with low cost, and it is simple in structure, but, this reflecting plate 13 only can improve the light utilization ratio and the light from 18 outgoing of leaded light bar is evenly distributed on all directions, and spacing is arranged between leaded light bar 18 and the prism plate 17, is easy to generate light leak and absorption loss.
[utility model content]
For overcoming the big and lower defective of light utilization efficiency of LED surface light source volume in the prior art, the utility model provides the LED surface light source that a kind of volume is little, light is evenly distributed and light utilization efficiency is higher in light guide plate.
The technical scheme that the utility model technical solution problem is adopted is: a kind of LED surface light source is provided, it comprises that two light emitting diodes, two reflector plates, two brightening pieces, light guide plate comprise four sides and first, second surface, its first surface is a light-emitting face, and its a pair of opposite flank is an optical input surface.Wherein, these two brightening pieces are attached to the optical input surface of this light guide plate, and these two reflector plates are arranged on optical input surface one side of this light guide plate, and fold two cavitys of formation with these two brightening pieces respectively, and these two cavitys are used for holding this two light emitting diodes.
Compare with prior art, the beneficial effects of the utility model are that this LED surface light source adopts two light emitting diodes to cooperate reflector plate to constitute light source, by the appropriate design reflector plate structure, light is evenly distributed in cavity, and be approximately two line sources, and then the interior light of light guide plate is evenly distributed, this brightening piece is attached to two opposite flanks of this light guide plate, can improve the efficient that light incides light guide plate.These two light emitting diodes are surrounded by two cavitys that two reflector plates and two brightening pieces fold formation, and the light leak and the absorption loss of its generation are less, and volume is less.
[description of drawings]
Fig. 1 is the stereographic map of prior art LED surface light source.
Fig. 2 is the sectional view of prior art LED surface light source.
Fig. 3 is the stereographic map of the utility model first embodiment LED surface light source.
Fig. 4 is the sectional view of Fig. 3 along the III-III direction.
Fig. 5 is the sectional view of the utility model second embodiment LED surface light source.
Fig. 6 is the sectional view of the utility model the 3rd embodiment LED surface light source.
Fig. 7 is the sectional view of the utility model the 4th embodiment LED surface light source.
Fig. 8 is the stereographic map of the utility model the 5th embodiment LED surface light source.
[embodiment]
Seeing also Fig. 3 and Fig. 4, is first embodiment of the utility model LED surface light source.This LED surface light source 2 comprises a light guide plate 21, two 23,25, two light emitting diodes 27,29 of 22,24, two reflector plates of brightening piece.Wherein, this light guide plate 21 is a rectangle, it comprises four sides and first, second surface, its first surface is light-emitting face (not indicating), its a pair of opposite flank 211,212 is an optical input surface, another does not have the reflection horizon to opposite flank (indicating) and second surface (not indicating), and this second surface is provided with V-shaped groove or light diffusion site (figure does not show).These two brightening pieces 22,24 are attached to the optical input surface 211,212 of this light guide plate 21, these two reflector plates 23,25 are a groove structure, it links to each other with these two brightening pieces 22,24, and form two cavitys 26,28, these two cavitys 26,28 are used for holding this two light emitting diodes 27,29, and transmission light emitting diode 27,29 issued light lines.
Because light emitting diode the 27, the 29th is symmetrical arranged, and is example with light emitting diode 27, and the light path of the utility model LED surface light source 2 is described.Light emitting diode 27 is arranged on the top of cavity 26, its issued light line part is incident to brightening piece 22, another part is after reflector plate 23 reflections, brightening piece 22 transmissions, enter in this light guide plate 21, light transmits to each different directions in light guide plate 21, and final upper surface ejaculation by light guide plate 21.
For improving the uniformity coefficient of light utilization ratio and distribution of light, the optical input surface 211,212 of reflector plate 23,25 and this light guide plate 21 has angle, it changes the reflection angle that light transmits in cavity, it is more even to make that light distributes in cavity 26,28, and then improve the uniformity coefficient enter light guide plate 21 light, brightening piece 22,24 is attached to the optical input surface 211,212 of this light guide plate 21, light is concentrated imported in the light guide plate 21, and increase glorious degrees.
Be to produce more uniform emergent ray, reflector plate 23,25 can have the site design, and the light of light emitting diode 27,29 incidents is carried out scattering, so that make the light that enters brightening piece 22,24 more even, thereby makes the emergent ray of light guide plate 21 more even.Its site can be equal size, evenly distribute, and perhaps the edge is closeer away from the direction distribution of light emitting diode 27,29, each area is bigger.
For reducing the volume of area source 2, this light emitting diode 27,29 and reflector plate 23,25 all are arranged on the side of this light guide plate 21, and this light emitting diode 27,29 position is close to the brightening piece 22 of these light guide plate 21 sides, 24 and reflector plate 23,25, itself and reflector plate 23,25 and brightening piece 22,24 match, make light at its common cavity 26 that constitutes, 28 internal reflections transmission, by appropriate design reflector plate 23,25 structures, can make light at cavity 26, be evenly distributed in 28, and form the sidelight source of two proximal line light sources, it is little to reach volume, the effect of light good evenness.
This light guide plate 21 is to make with transparent material such as acryl resin, polycarbonate, polyvinyl resin or glass etc.This reflector plate 23,25 can adopt high light reflectivity rate material, above also reflectance coating directly can being plated in.
Second, third of the utility model LED surface light source, the 4th, the 5th embodiment all are architecture advances of doing about reflector plate, because its structure difference, the light guide effect of being reached is difference to some extent also.
Second embodiment of the utility model LED surface light source as shown in Figure 5, this LED surface light source 3 comprises a light guide plate 31, two 33,35, two light emitting diodes 37,39 of 32,34, two reflector plates of brightening piece.Wherein, the end of these two reflector plates 33,35 is an arc, compares with the plate shaped of first embodiment, and its reflecting effect is better.
The 3rd embodiment of the utility model LED surface light source as shown in Figure 6, this LED surface light source 4 comprises a light guide plate 41, two 43,45, two light emitting diodes 47,49 of 42,44, two reflector plates of brightening piece.Wherein, these two reflector plates 43,45 is whole curved.
The 4th embodiment of the utility model LED surface light source as shown in Figure 7, this LED surface light source 5 comprises a light guide plate 51, two 53,55, two light emitting diodes 57,59 of 52,54, two reflector plates of brightening piece.Wherein, the reflective surface of these two reflector plates 53,55 (not indicating) is provided with V-shaped groove, so that reflective, make distribution of light even.
The 5th embodiment of the utility model LED surface light source as shown in Figure 8, this LED surface light source 6 comprises a light guide plate 61, two 63,65, two light emitting diodes 67,69 of 62,64, two reflector plates of brightening piece.Wherein, these two reflector plates 63,65 are arc groove, these two light emitting diodes 67,69 are arranged on the focus of this arc groove, after light is sent by light emitting diode 67,69, through these two reflector plates, 63,65 reflections, incide brightening piece 62,64 with approximate parallel angle, enter at last in the light guide plate 61, can improve the uniformity coefficient that light distributes in light guide plate 61.
Claims (9)
1. LED surface light source, it comprises: two light emitting diodes and a light guide plate, this light guide plate comprises four sides and first, second surface, its first surface is a light-emitting face, its a pair of opposite flank is an optical input surface, it is characterized in that: this LED surface light source also comprises two reflector plates and two brightening pieces, these two brightening pieces are attached to the optical input surface 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 these two cavitys are used for holding this two light emitting diodes.
2. LED surface light source as claimed in claim 1 is characterized in that: this light guide plate cross section is a rectangle.
3. LED surface light source as claimed in claim 1 is characterized in that: the optical input surface of these two reflector plates and this light guide plate has angle.
4. LED surface light source as claimed in claim 1 is characterized in that: this light guide plate also comprises a plurality of sites, and it is positioned on the second surface of this light guide plate.
5. LED surface light source as claimed in claim 1 is characterized in that: these two reflector plates are a groove shape or arc or arc groove or terminally are arc.
6. LED surface light source as claimed in claim 1 is characterized in that: these two reflector plates are provided with V-shaped groove.
7. LED surface light source as claimed in claim 1 is characterized in that: another of this light guide plate has the reflection horizon to opposite flank and second surface.
8. LED surface light source as claimed in claim 1 is characterized in that: two reflector plates have the site design.
9. LED surface light source as claimed in claim 8 is characterized in that: the site of two reflector plates is closeer along the direction distribution away from light emitting diode, each area is bigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032261128U CN2624238Y (en) | 2003-05-10 | 2003-05-10 | Area light source for LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032261128U CN2624238Y (en) | 2003-05-10 | 2003-05-10 | Area light source for LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2624238Y true CN2624238Y (en) | 2004-07-07 |
Family
ID=34246373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032261128U Expired - Lifetime CN2624238Y (en) | 2003-05-10 | 2003-05-10 | Area light source for LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2624238Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2014047984A1 (en) * | 2012-09-28 | 2014-04-03 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN104375324A (en) * | 2014-11-17 | 2015-02-25 | 深圳市华星光电技术有限公司 | Backlight module and display with the same |
-
2003
- 2003-05-10 CN CNU032261128U patent/CN2624238Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2014047984A1 (en) * | 2012-09-28 | 2014-04-03 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN104375324A (en) * | 2014-11-17 | 2015-02-25 | 深圳市华星光电技术有限公司 | Backlight module and display with the same |
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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: 20130510 Granted publication date: 20040707 |