CN103644479A - Parallel-plane backlight source - Google Patents
Parallel-plane backlight source Download PDFInfo
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- CN103644479A CN103644479A CN201310715503.2A CN201310715503A CN103644479A CN 103644479 A CN103644479 A CN 103644479A CN 201310715503 A CN201310715503 A CN 201310715503A CN 103644479 A CN103644479 A CN 103644479A
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Abstract
The invention relates to the technical field of LED (light emitting diode) light source equipment and in particular relates to a parallel-plane backlight source. The parallel-plane backlight source comprises a shell and a PCB (printed circuit board) fixed in the shell, wherein LEDs are attached to the PCB; the upper part of the shell adopts an opening structure; a diffusing panel, two layers of light guide films and a protection pressing plate are sequentially arranged in an opening from inside to outside; the two layers of the light guide films are stacked to form a double-layer staggered light guide films; the diffusing panel is mainly used for converting light emitted by the LEDs into uniform diffusing surface light; the light source is converted into diffusing light after passing through the diffusing panel; the uniformity of the whole breadth can be up to over 95 percent. The parallel-plane backlight source disclosed by the invention is a parallel-plane light source. Compared with the common plane light source, the parallel-plane backlight source has the advantages that the directions of emitted light rays are concentrated, and the light rays are similar to parallel light; compared with other types of parallel light source, the parallel-plane backlight source has the advantages that the whole shape is simple, and the size is small; the parallel-plane backlight source is flat, low in height and convenient to mount; the space can be saved; the luminous surface is easier to enlarge; the practicability is higher.
Description
Technical field
The present invention relates to LED light source equipment technical field, refer in particular to a kind of plane parallel backlight.
Background technology
As light source, LCD backlight for example, planar light emitting device is used, and it is from the spot light utilizing emitted light of the light emitting diode of for example flat shape.Planar light emitting device is constructed to make the light from least one light emitting diode to enter to have an end surfaces in the face of the light guide plate of the position of first type surface, and transmitting is from the light on the whole surface of in the first type surface of light guide plate.
As such planar light emitting device, for example JP2007-311327A discloses a kind of planar light source device, and it comprises a plurality of spot lights; Guide plate from emitting surface to a side surface transmitting from the incident light modulation of spot light; The lower part box substantially with the side surface that the incidence surface with light guide plate forms abreast; With light source bottom, a plurality of spot lights are placed thereon with the interval of being scheduled to, and it is positioned at a side of the incidence surface of light guide plate, wherein, base layer support member is provided as adopting and is placed on two nipple support light source bottoms between spot light and the side surface of lower part box.
Above-mentioned planar light emitting device because build is large, complex structure, assembly difficulty be higher, and direction of illumination not evenly to cause light source to change into diffusion uniformity of light lower, defect is obvious.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of simple in structure, little, convenient installation that take up room, and emits radiation direction and concentrate, a kind of plane parallel backlight of approximate directional light.
In order to solve the problems of the technologies described above; the present invention adopts following technical scheme: a kind of plane parallel backlight; comprise shell and be fixed on the pcb board in shell; on this pcb board, be pasted with LED; the top of this shell is hatch frame; this opening part is disposed with diffusing panel, light guiding film and protection pressing plate from the inside to surface, and described light guiding film is two-layer, and this two-layer light guiding film mutually superposes and is sticked to form double-layer staggered light guiding film.
Wherein, the described two-layer light guiding film staggered angle that mutually superposes is 90 °, forms Orthogonal Double-layer leaded light rete.
Wherein, described light guiding film comprises bed course, basal layer and patterned layer, and described basal layer is that polyester film is made, and described patterned layer is that acrylic resin is made.
Wherein, described protection pressing plate is the proofing dust and protecting cover sheet that is coated with anti-reflection film.
Wherein, described basal layer and patterned layer thickness add up to 60～70 microns.
Wherein, the thickness of described basal layer is 45～55 microns.
Wherein, the patterned layer of described light guiding film is provided with the prism of a plurality of projections.
Wherein, the spacing between adjacent two described prisms is 20～30 microns.
Wherein, the prism angle of described prism is 90 degree.
Beneficial effect of the present invention is: the invention provides a kind of plane parallel backlight, wherein diffusing panel Main Function is that the light that LED is sent is converted to uniform diffusing surface light, the light sending due to LED has certain distribution characteristics, in whole light-emitting area, direction of illumination be all inhomogeneous to Luminance Distribution, after diffusing panel, light source converts diffused light to, and whole breadth uniformity can reach more than 95%.
Plane parallel backlight of the present invention is plane parallel light source, compares with common plane light source, and it emits beam in direction set, approximate directional light; Compare with other kind directional lights, global shape is simple, size is little, for flat, highly little, is convenient to install, and saves space, and it is larger that light-emitting area is also easy to do, and practicality is stronger.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention.
Fig. 2 is stereochemical structure decomposing schematic representation of the present invention.
Fig. 3 is the local structure for amplifying schematic diagram of light guiding film of the present invention.
Fig. 4 is the light path propagation schematic diagram that light passes light guiding film.
Fig. 5 is mutually the superpose structural representation of staggered angle Orthogonal Double-layer leaded light rete while being 90 ° of the two-layer light guiding film of the present invention.
Fig. 6 is the plan structure schematic diagram of the present invention while hiding diffusing panel, light guiding film and protection pressing plate.
Fig. 7 is the cross-sectional view of A-A in Fig. 6.
The specific embodiment
For the ease of those skilled in the art's understanding, below in conjunction with embodiment and accompanying drawing, the present invention is further illustrated, and the content that embodiment is mentioned not is limitation of the invention.
As shown in Figures 1 to 6; a kind of plane parallel backlight; comprise shell 1 and be fixed on the pcb board 2 in shell 1; on this pcb board 2, be pasted with LED3; the top of this shell 1 is hatch frame; this opening part is disposed with diffusing panel 4, light guiding film 5 and protection pressing plate 6 from the inside to surface, and described light guiding film 5 is two-layer, and this two-layer light guiding film 5 mutually stack is sticked to form double-layer staggered light guiding film.
Diffusing panel 4 Main Functions are that the light that LED3 is sent is converted to uniform diffusing surface light, the light sending due to LED3 has certain distribution characteristics, in whole light-emitting area, direction of illumination be all inhomogeneous to Luminance Distribution, after diffusing panel 4, light source converts diffused light to, and whole breadth uniformity can reach more than 95%, then passes through twice conversion of two-layer light guiding film 5, it emits beam in direction set, approximate directional light.
Plane parallel backlight of the present invention is plane parallel light source, compares with other kind directional lights, and global shape is simple, size is little, for flat, highly little, is convenient to install, and saves space, and it is larger that light-emitting area is also easy to do.
In the present embodiment, the described two-layer light guiding film 5 mutually staggered angle of stack is 90 °, forms Orthogonal Double-layer leaded light rete, compares with common plane light source, and its direction that emits beam is more concentrated, more approximate directional light, and practicality is stronger
See Fig. 3, the described light guiding film 5 of the present embodiment comprises bed course 51, basal layer 52 and patterned layer 53, described basal layer 52 is made for polyester film, described patterned layer 53 is made for acrylic resin, described basal layer 52 and patterned layer 53 thickness add up to 60～70 microns, the thickness of described basal layer 52 is 45～55 microns, and the patterned layer 53 of described light guiding film 5 is provided with the prism 54 of a plurality of projections.
Preferably, see Fig. 3, the thickness of described basal layer 52 is 52 microns, and described basal layer 52 and patterned layer 53 thickness add up to 65 microns, and the spacing between adjacent two described prisms 54 is 26 microns, and the prism angle [alpha] of described prism 54 is 90 degree.Can not only preferably diffused light direction be converged, concentrate towards perpendicular to light source luminescent face; In addition, in the situation that backlight has accurately spacing, angle, thickness and reflectance, circulation utilizes its light source to reach the effect that increases brightness with diffusion, and the efficiency of light energy utilization is higher.
The described protection pressing plate 6 of the present embodiment is for being coated with the proofing dust and protecting cover sheet of anti-reflection film; can not only effectively prevent that the foreign material such as external dust from entering in shell 1; guarantee that diffusing panel 4 and light guiding film 5 have higher cleannes; the light transmittance that can also improve protection pressing plate 6, further improves the efficiency of light energy utilization.
Above-described embodiment is preferably implementation of the present invention, and in addition, the present invention can also realize by alternate manner, and under the prerequisite that does not depart from the technical program design, any apparent replacement is all within protection scope of the present invention.
Claims (9)
1. a plane parallel backlight; comprise shell (1) and be fixed on the pcb board (2) in shell (1); this pcb board is pasted with LED(3 on (2)); the top of this shell (1) is hatch frame; this opening part is disposed with diffusing panel (4), light guiding film (5) and protection pressing plate (6) from the inside to surface; it is characterized in that: described light guiding film (5) is for two-layer, and this two-layer light guiding film (5) mutually stack forms double-layer staggered light guiding film.
2. a kind of plane parallel backlight according to claim 1, is characterized in that: described two-layer light guiding film (5) the staggered angle that mutually superposes is 90 °.
3. a kind of plane parallel backlight according to claim 1, it is characterized in that: described light guiding film (5) comprises bed course (51), basal layer (52) and patterned layer (53), described basal layer (52) is made for polyester film, and described patterned layer (53) is made for acrylic resin.
4. a kind of plane parallel backlight according to claim 1, is characterized in that: described protection pressing plate (6) is for being coated with the proofing dust and protecting cover sheet of anti-reflection film.
5. a kind of plane parallel backlight according to claim 1, is characterized in that: the thickness of described basal layer (52) and patterned layer (53) adds up to 60～70 microns.
6. a kind of plane parallel backlight according to claim 1, is characterized in that: the thickness of described basal layer (52) is 45～55 microns.
7. a kind of plane parallel backlight according to claim 1, is characterized in that: the patterned layer (53) of described light guiding film (5) is provided with the prism (54) of a plurality of projections.
8. a kind of plane parallel backlight according to claim 7, is characterized in that: the spacing between adjacent two described prisms (54) is 20～30 microns.
9. a kind of plane parallel backlight according to claim 7, is characterized in that: the prism angle of described prism (54) is 90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715503.2A CN103644479B (en) | 2013-12-23 | 2013-12-23 | A kind of Parallel-plane backlight source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715503.2A CN103644479B (en) | 2013-12-23 | 2013-12-23 | A kind of Parallel-plane backlight source |
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| Publication Number | Publication Date |
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| CN103644479A true CN103644479A (en) | 2014-03-19 |
| CN103644479B CN103644479B (en) | 2016-03-30 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09282921A (en) * | 1996-04-10 | 1997-10-31 | Canon Inc | Back light device and liquid crystal display device provided with this back light device |
| JP2002182201A (en) * | 2000-12-11 | 2002-06-26 | Shigeto Omori | Video display unit |
| CN102261602A (en) * | 2010-05-28 | 2011-11-30 | 财团法人工业技术研究院 | Backlight module, area light source module and light guide grid structure |
| CN102901014A (en) * | 2012-11-14 | 2013-01-30 | 深圳市华星光电技术有限公司 | Direct type backlight module and liquid crystal display module using same |
| CN103090271A (en) * | 2013-01-24 | 2013-05-08 | 青岛海信电器股份有限公司 | Novel straight down type backlight module and liquid crystal display television (LCD TV) |
| CN203628383U (en) * | 2013-12-23 | 2014-06-04 | 东莞市奥普特自动化科技有限公司 | Plane parallel backlight source |
-
2013
- 2013-12-23 CN CN201310715503.2A patent/CN103644479B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09282921A (en) * | 1996-04-10 | 1997-10-31 | Canon Inc | Back light device and liquid crystal display device provided with this back light device |
| JP2002182201A (en) * | 2000-12-11 | 2002-06-26 | Shigeto Omori | Video display unit |
| CN102261602A (en) * | 2010-05-28 | 2011-11-30 | 财团法人工业技术研究院 | Backlight module, area light source module and light guide grid structure |
| CN102901014A (en) * | 2012-11-14 | 2013-01-30 | 深圳市华星光电技术有限公司 | Direct type backlight module and liquid crystal display module using same |
| CN103090271A (en) * | 2013-01-24 | 2013-05-08 | 青岛海信电器股份有限公司 | Novel straight down type backlight module and liquid crystal display television (LCD TV) |
| CN203628383U (en) * | 2013-12-23 | 2014-06-04 | 东莞市奥普特自动化科技有限公司 | Plane parallel backlight source |
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| CN103644479B (en) | 2016-03-30 |
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Address after: Changan Jin Jin Ha Community Industrial District of Henan city of Dongguan province Guangdong 523000 liters Road No. 8 Patentee after: Guangdong aopute Polytron Technologies Inc Address before: 523000 Guangdong Province, Dongguan city Changan town community usha S358 Provincial Highway No. 551 Yifeng commercial building, 4 floor Patentee before: Dongguan OPT Machine Vision Tech Co.,Ltd. |