CN104111491A - Light guide board and backlight module - Google Patents
Light guide board and backlight module Download PDFInfo
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- CN104111491A CN104111491A CN201310137261.3A CN201310137261A CN104111491A CN 104111491 A CN104111491 A CN 104111491A CN 201310137261 A CN201310137261 A CN 201310137261A CN 104111491 A CN104111491 A CN 104111491A
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- light guide
- microns
- guide plate
- exiting surface
- triangular prism
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Abstract
The invention relates to a light guide board. The light guide board has a light incoming face and a light outgoing face which are opposite to each other, wherein a micro structure is formed on the light outgoing face, the micro structure is multiple tri-prism-shaped convex projections which are parallel and are arranged with intervals, each of the tri-prism-shaped convex projections has a first side face and a second side face which are mutually connected, the first side face and the second side face are respectively connected with the light outgoing face, the first side face and the second side face have an included angle in a range of 130-170 DEG, a crossing line of the first side face and the second side face is in parallel with the light outgoing face, a distance from the crossing line of the first side face and the second side face to the light outgoing face is in a range of 1.3-5.5mum, and a distance between two crossing lines of the first side faces and the second side faces of the two adjacent tri-prism-shaped convex projections is in a range of 30-50mum. The invention further relates to a backlight module having the light guide board.
Description
Technical field
The present invention relates to light guide plate and backlight module, relate in particular to a kind of light guide plate for down straight aphototropism mode set and there is the backlight module of this light guide plate.
Background technology
Backlight module, as a kind of light source module, is often the electronic installation illuminations such as instrument, display device.A kind of typical down straight aphototropism mode set comprises multiple light sources and the light guide plate relative with the plurality of light source.In order to improve the bright dipping briliancy of backlight module, conventionally need to use the higher light source of brightness, like this, the cost of manufacture of the backlight module of increase.Therefore, be necessary to provide a kind of light guide plate and backlight module, can improve the bright dipping briliancy of backlight module.
Summary of the invention
In view of this, be necessary to provide a kind of light guide plate of the bright dipping briliancy that can improve backlight module and there is the leaded light backlight module that exceeds brilliant degree.
A kind of light guide plate, it has relative incidence surface and exiting surface, described exiting surface is formed with microstructure, described microstructure is multiple multiple triangular prism shaped projections that are parallel to each other and are separated from each other setting, described triangular prism shaped projection has interconnective the first side and the second side, described the first side and the second side all interconnect with exiting surface, angle between described the first side and the second side is 130 degree to 170 degree, the intersection of described the first side and the second side is parallel with exiting surface, described the first side and the intersection of the second side and the distance of exiting surface are 1.3 microns to 5.5 microns, distance between the first side of two adjacent triangular prism shaped projections and the intersection of the second side is 30 microns to 50 microns.
A kind of backlight module, it comprises multiple light sources and described light guide plate, and described light source is relative with the incidence surface of light guide plate, and the light of described light source outgoing is incident to light guide plate from described incidence surface, from the microstructure outgoing of the exiting surface of described light guide plate.
With respect to prior art, when light transmission light guide plate that light source in the technical program sends, the light of outgoing is adjusted by the microstructure of light guide plate, thereby make the distribution angle of light of backlight module outgoing more concentrated, the brightness value of positive angle is higher, the less light source of brightness that price is more cheap can be used, the brightness value requirement in the positive angle of backlight module can be able to met.
Brief description of the drawings
Fig. 1 is the backlight module diagrammatic cross-section of the technical program.
Fig. 2 is the schematic perspective view of the light guide plate of Fig. 1.
Fig. 3 is the distributed intention of the rising angle of the backlight module of the first embodiment of the technical program.
Fig. 4 is the distributed intention of the rising angle of the backlight module of the second embodiment of the technical program.
Main element symbol description
| Backlight module | 100 |
| Light guide plate | 10 |
| Light source | 20 |
| Reflector plate | 30 |
| Incidence surface | 11 |
| Exiting surface | 12 |
| Microstructure | 13 |
| Triangular prism shaped projection | 131 |
| The first side | 1311 |
| The second side | 1312 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1 and Fig. 2, the backlight module 100 that first embodiment of the invention provides comprises a light guide plate 10, multiple light source 20 and a reflector plate 30.
This light guide plate 10 is located at the top of described multiple light source 20, that is to say, this light guide plate 10 is relative with the plurality of light source 20.Described light guide plate 10 is and is roughly tabularly, and it has relative incidence surface 11 and exiting surface 12.Described incidence surface 11 is arranged in parallel with described exiting surface 12.Described incidence surface 11 is relative with light source 20.
Described light guide plate 10 is made up of light transmissive material, and the material of described light guide plate 10 can be two kinds or more of the formed potpourri in polycarbonate (PC), polymethylmethacrylate (PMMA), methyl methacrylate, styrene copolymerized compound (MS), polyethylene terephthalate (PETG), polystyrene (PS) or above-mentioned material.
The exiting surface 12 of described light guide plate 10 is formed with microstructure 13.Described microstructure 13 is parallel to each other and is separated from each other the multiple triangular prism shaped protruding 131 of setting for multiple, and triangular prism shaped protruding 131 length direction is parallel with exiting surface 12.Described triangular prism shaped protruding 131 have interconnective the first side 1311 and the second side 1312, described the first side 1311 and the second side 1312 all interconnect with exiting surface 12, angle theta between described the first side 1311 and the second side 1312 is 130 degree to 170 degree, the intersection of described the first side 1311 and the second side 1312 is parallel with exiting surface 12, described the first side 1311 and the intersection of the second side 1312 and the distance H of exiting surface 12 are 1.3 microns to 5.5 microns, distance P between adjacent the first side 1311 and the intersection of the second side 1312 of two triangular prism shaped protruding 131 is 30 microns to 50 microns.
In the present embodiment, the spacing between described multiple triangular prism shaped protruding 131 equates.Preferably, angle theta between described the first side 1311 and the second side 1312 is 130 degree to 150 degree, described the first side 1311 and the intersection of the second side 1312 and the distance H of exiting surface 12 are 4 microns to 5.5 microns, and the distance P between adjacent the first side 1311 and the intersection of the second side 1312 of two triangular prism shaped protruding 131 is 40 microns to 50 microns.More preferably, angle theta between described the first side 1311 and the second side 1312 is 130 degree, described the first side 1311 and second intersection of side 1312 and the distance H of exiting surface are 5.5 microns, and the distance P between adjacent the first side 1311 and the intersection of the second side 1312 of two triangular prism shaped protruding 131 is 50 microns.
That is to say, each triangular prism shaped protruding 131 for a side side and exiting surface 12 in three sides of triangular prism overlap, the first side 1311 and the second side 1312 described in two other side of triangular prism is respectively.Described triangular prism shaped protruding 131 longitudinal section is isosceles triangle.The drift angle that is described isosceles triangle away from the angle of described exiting surface 12.The angle θ of described drift angle is 130 degree to 170 degree.Described isosceles triangle is 1.3 microns to 5.5 microns away from the distance H between summit and the exiting surface 12 of described exiting surface 12, and the distance between the summit of two adjacent triangular prism shaped longitudinal sections of protruding 131 is P30 micron to 50 micron.
Preferably, the angle θ of described drift angle is 130 degree to 150 degree.Described isosceles triangle is 4 microns to 5.5 microns away from the distance H between summit and the exiting surface 12 of described exiting surface 12, and the distance P between the summit of two adjacent triangular prism shaped longitudinal sections of protruding 131 is 40 microns to 50 microns.More preferably, the angle θ of described drift angle is 130 degree.Described isosceles triangle is 5.5 microns away from the distance H between summit and the exiting surface 12 of described exiting surface 12, and the distance P between the summit of two adjacent triangular prism shaped longitudinal sections of protruding 131 is 50 microns.
Described multiple light source 20 is between described light guide plate 10 and reflector plate 30, for to described light guide plate 10 emission of lights.
Described reflector plate 30 is located at the below of described multiple light source 20, that is, described reflector plate 30 is relative with described multiple light sources 20.Described reflector plate 30 for by the light reflection from light source 20 to light guide plate 10, to improve the light utilization of light source 20.
Refer to Fig. 3 and Fig. 4, the technical program also rising angle of the backlight module to different microstructure size measures.Wherein, in the first embodiment, angle between described the first side 1311 and the second side 1312 is 170 degree, described the first side 1311 and the intersection of the second side 1312 and the distance of exiting surface 12 are 1.3 microns, and the distance between adjacent the first side 1311 and the intersection of the second side 1312 of two triangular prism shaped protruding 131 is 30 microns.In the second embodiment, angle between described the first side 1311 and the second side 1312 is 130 degree, described the first side 1311 and second intersection of side 1312 and the distance of exiting surface are 5.5 microns, and the distance between adjacent the first side 1311 and the intersection of the second side 1312 of two triangular prism shaped protruding 131 is 50 microns.Adopt identical light source, utilize rising angle distribution measurement instrument to test respectively the rising angle of backlight module, wherein, the rising angle of the second embodiment is obviously concentrated than the rising angle of the first embodiment.
The backlight module 100 of the technical program can further include brightness enhancement film 40, and described brightness enhancement film 40 is arranged at exiting surface 12 1 sides of light guide plate 10, and be arranged in parallel with light guide plate 10.Described brightness enhancement film 40 can be adjusted the angle of the light of light guide plate 10 outgoing, makes emergent ray be positioned at positive visual angle.
In the technical program, also the bright dipping briliancy of two backlight modules with the light guide plate that above-mentioned the first embodiment of having of same light source 20 and identical brightness enhancement film 40 and the second embodiment provide is tested, in the present embodiment, at positive visual angle, 100 of backlight module differences are measured, the data that obtain are as following table:
| Test point | The first embodiment brightness value (cd/m 2) | The first embodiment brightness value (cd/m 2) |
| 1 | 7363 | 8345 |
| 2 | 7341 | 8250 |
| 3 | 7456 | 8280 |
| 4 | 7504 | 8305 |
| 5 | 7439 | 8259 |
| 6 | 7268 | 8094 |
| 7 | 7085 | 7847 |
| 8 | 7036 | 7618 |
| 9 | 6761 | 7039 |
| 10 | 6328 | 6292 |
| On average | 7167.1 | 7832.9 |
As can be seen from the above data, the effect of the brightness value at the positive visual angle of the lifting of the light guide plate in the second embodiment backlight module is more obvious.
When light transmission light guide plate 10 that light source 20 in the technical program sends, the light of outgoing is adjusted by the microstructure of light guide plate 10, thereby make the distribution angle of light of backlight module 100 outgoing more concentrated, the brightness value of positive angle is higher, the less light source of brightness that price is more cheap can be used, the brightness value requirement in the positive angle of backlight module 100 can be able to met.
Be understandable that, those skilled in the art also can do other and change in spirit of the present invention, within all should being included in the present invention's scope required for protection.
Claims (8)
1. a light guide plate, it has relative incidence surface and exiting surface, described exiting surface is formed with microstructure, described microstructure is multiple multiple triangular prism shaped projections that are parallel to each other and are separated from each other setting, described triangular prism shaped projection has interconnective the first side and the second side, described the first side and the second side all interconnect with exiting surface, angle between described the first side and the second side is 130 degree to 170 degree, the intersection of described the first side and the second side is parallel with exiting surface, described the first side and the intersection of the second side and the distance of exiting surface are 1.3 microns to 5.5 microns, distance between the first side of two adjacent triangular prism shaped projections and the intersection of the second side is 30 microns to 50 microns.
2. light guide plate as claimed in claim 1, is characterized in that, the spacing between described multiple triangular prism shaped projections equates.
3. light guide plate as claimed in claim 1, it is characterized in that, angle between described the first side and the second side is 130 degree to 150 degree, described the first side and the intersection of the second side and the distance of exiting surface are 4 microns to 5.5 microns, and the distance between the first side of two adjacent triangular prism shaped projections and the intersection of the second side is 40 microns to 50 microns.
4. light guide plate as claimed in claim 1, it is characterized in that, angle between described the first side and the second side is 130 degree, described the first side and the intersection of the second side and the distance of exiting surface are 5.5 microns, and the distance between the first side of two adjacent triangular prism shaped projections and the intersection of the second side is 50 microns.
5. a light guide plate, it has relative incidence surface and exiting surface, described exiting surface is formed with microstructure, described microstructure is multiple multiple triangular prism shaped projections that are parallel to each other and are separated from each other setting, the longitudinal section of described triangular prism shaped projection is isosceles triangle, the drift angle that is described isosceles triangle away from the angle of described exiting surface, the angle of described drift angle is 130 degree to 170 degree, described isosceles triangle is 1.3 microns to 5.5 microns away from the distance between summit and the exiting surface of described exiting surface, distance between the summit of the longitudinal section of two adjacent triangular prism shaped projections is that micron is to micron.
6. a backlight module, it comprises multiple light sources and the light guide plate as described in claim 1 to 4 any one, described light source is relative with the incidence surface of light guide plate, and the light of described light source outgoing is incident to light guide plate from described incidence surface, from the microstructure outgoing of the exiting surface of described light guide plate.
7. backlight module as claimed in claim 6, is characterized in that, described multiple array of source are arranged.
8. backlight module as claimed in claim 6, is characterized in that, described backlight module also comprises brightness enhancement film, and described brightness enhancement film is formed at a side of light guide plate exiting surface, and described brightness enhancement film is for adjusting the light of light guide plate outgoing in positive visual angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310137261.3A CN104111491A (en) | 2013-04-19 | 2013-04-19 | Light guide board and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310137261.3A CN104111491A (en) | 2013-04-19 | 2013-04-19 | Light guide board and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104111491A true CN104111491A (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310137261.3A Pending CN104111491A (en) | 2013-04-19 | 2013-04-19 | Light guide board and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104111491A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133793A (en) * | 2019-05-30 | 2019-08-16 | 深圳创维－Rgb电子有限公司 | A kind of light guiding film and display device |
| CN110308511A (en) * | 2019-06-29 | 2019-10-08 | 深圳创维－Rgb电子有限公司 | A kind of light guide structure, side entrance back module and display equipment |
-
2013
- 2013-04-19 CN CN201310137261.3A patent/CN104111491A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133793A (en) * | 2019-05-30 | 2019-08-16 | 深圳创维－Rgb电子有限公司 | A kind of light guiding film and display device |
| CN110133793B (en) * | 2019-05-30 | 2021-06-01 | 深圳创维－Rgb电子有限公司 | Light guide film and display device |
| CN110308511A (en) * | 2019-06-29 | 2019-10-08 | 深圳创维－Rgb电子有限公司 | A kind of light guide structure, side entrance back module and display equipment |
| CN110308511B (en) * | 2019-06-29 | 2021-09-28 | 深圳创维－Rgb电子有限公司 | Light guide structure, side-in backlight module and display device |
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Application publication date: 20141022 |