CN104678479A - Light guide plate - Google Patents
Light guide plate Download PDFInfo
- Publication number
- CN104678479A CN104678479A CN201310639859.2A CN201310639859A CN104678479A CN 104678479 A CN104678479 A CN 104678479A CN 201310639859 A CN201310639859 A CN 201310639859A CN 104678479 A CN104678479 A CN 104678479A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light
- light guide
- rake
- incidence 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
Abstract
The invention relates to a light guide plate. The light guide plate comprises an inlet-light surface, a bottom surface which is intersected with the inlet-light surface and an outlet-light surface which is opposite to the bottom surface, wherein a plurality of point light sources are arranged at one side corresponding to the inlet-light surface; the inlet-light surface is provided with an oblique part and a plane part, the plane part is perpendicular to the bottom surface, an angle is formed between the oblique part and the bottom surface, and the angle is less than 90 degrees. Light of each point light source is unlikely to lose after entering the light guide plate, the light can be effectively used in the light guide plate, and the efficiency of an overall backlight module can be improved.
Description
Technical field
The present invention relates to a kind of lighting device, especially a kind of light guide plate.
Background technology
Generally be applied in the liquid crystal display of information device, utilize the backlight module framework of straight-down negative or side-light type, as shown in the first figure and the second figure (A), be the structure of general side-light backlight module, primarily of pointolite 11, light guide plate 12, diffuser plate 13 and prism arrangement 14 form, this light guide plate 12 comprises an incidence surface 121, one bottom surface 122 crossing with this incidence surface 121, and an exiting surface 123 relative with this bottom surface 122, this pointolite 11 is arranged at should the side of incidence surface 121, the light that acceptance point light source 11 sends, the light reflection that its bottom surface 122 will import, scattering, formed along the homodisperse scattered beam of all directions, this homodisperse light is derived light guide plate 12 by this exiting surface 123, guiding display panels.Wherein, light guide plate 12 as shown is plate shaped, and the light of each pointolite 11 then enters light guide plate 12 by this incidence surface 121, is penetrated by light by light guide plate 12 from the direction of expection; It is fine that the part parallel rays L1 of this pointolite 11 enters light guide plate 12 by incidence surface 121, and this light L1 is directly penetrated by the side of light guide plate 12, and cannot penetrate towards exiting surface 123, greatly loses the energy of light, and then reduces the efficiency of backlight module.In addition, this light guide plate 12 also can as Suo Shi second figure (B) clapboard, a teat 124 is formed in incidence surface 121 place, make the height H l of this teat 124 higher than the height H 2 of light guide plate 12, and the height H l of this teat 124 is greater than the diameter of pointolite 11, the light of each pointolite 11 is then injected by this teat 124, and the light making pointolite whole is able to enter light guide plate 12 by teat 124, penetrated from the direction of expection by light guide plate 12, light guide plate light inlet area is increased.Teat 124 forms towards the exiting surface 123 of light guide plate the inclined-plane 125 that certain angle tilts, therefore the some light Ll of pointolite 11 enters light guide plate 12 by incidence surface 121, by the refraction on this inclined-plane 125, light L2 is injected towards bottom surface 122, again via the refraction of bottom surface 122, light L3 then penetrates towards exiting surface 123, this light L3 is just able to penetrate towards exiting surface 123 via above-mentioned repeatedly refraction, greatly loses the energy of light, and then reduces the efficiency of backlight module.
Summary of the invention
The technical problem to be solved in the present invention overcomes prior art defect, provides a kind of light guide plate.
For the technical scheme solving the problems of the technologies described above employing is: a kind of light guide plate, light guide plate at least includes an incidence surface, a bottom surface crossing with this incidence surface, and an exiting surface relative with this bottom surface, and multiple pointolite is arranged at should the side of incidence surface; This incidence surface is formed with a rake and a planar portions, this planar portions and plane perpendicular, and this rake and bottom surface shape have angle, and this angle is less than 90 degree.
This rake and/or planar portions are provided with plural optical microstructures.
This optical microstructures can be the groove on recessed surface or horizontal channel or vertical trench.
This groove can be V-arrangement or arc.
This beneficial effect of the invention is: not easily run off after the light of pointolite enters light guide plate by incidence surface, effectively can apply, and then promote the efficiency of overall backlight module in light guide plate.
Accompanying drawing explanation
Fig. 1 is the structural perspective of existing light guide plate;
Fig. 2 A, B are existing light conducting plate structure schematic diagram;
Fig. 3 is the structural perspective of the first embodiment;
Fig. 4 A is the structural representation of the first embodiment;
Fig. 4 B is the second example structure schematic diagram;
Fig. 5 is the 3rd example structure stereographic map;
Fig. 6 is the 4th example structure schematic diagram;
Fig. 7 is the 5th example structure stereographic map;
Fig. 8 is the 6th example structure schematic diagram.
Pointolite 11, rake 211, light guide plate 12, planar portions 212, incidence surface 121, connecting portion 213, bottom surface 22, exiting surface 23, teat 24, inclined-plane 25, connects and falls apart 13, V-arrangement vertical trench 26, prism arrangement 14, arc vertical trench 27, light guide plate 20, pointolite 3, incidence surface 21.
Embodiment
The first enforcement side of structure as shown in the 3rd figure and the 4th figure (A) of light guide plate 20, this light guide plate 20 is wedge shape, it at least includes an incidence surface 21, one bottom surface 22 crossing with this incidence surface 21, and an exiting surface 23 relative with this bottom surface 22, and complex points light source 3 is arranged at should the side of incidence surface 21, this light guide plate 20 forms a teat 24 in incidence surface 21 place, make the height H 2 of height H 1 higher than light guide plate 20 of this teat 24, and the height H 1 of this teat 24 is greater than the diameter of pointolite 3, and this teat 24 forms towards the exiting surface 23 of light guide plate the inclined-plane 25 that certain angle tilts.This incidence surface 21 forms at least one rake 211, in enforcement side as shown in the figure, this incidence surface 21 forms a rake 211, and this rake 211 forms 22 1 included angle A with bottom surface, this included angle A is less than 90 degree, and the some light Ll of pointolite 3 enters light guide plate 20 by incidence surface 21, by this rake 2ll, light L2 is directly injected towards bottom surface 22, after refraction by bottom surface 22, light L3 then penetrates towards exiting surface 23, and this rake 211 can reduce the light injecting inclined-plane 25.As shown in the 4th figure, (A) is this creation second implements side, light guide plate 20 is plate shaped, be provided with incidence surface 21, bottom surface 22, and exiting surface 23, this incidence surface 21 also forms single rake 211, the part light L1 of this pointolite 3 enters light guide plate 20 by incidence surface 21, directly injected towards bottom surface 22 by the smooth L2 of this rake 211, by refraction Hou of bottom surface 22, light L3 then penetrates towards exiting surface 23, rake 211 can reduce the light penetrated by light guide plate side, makes light enter light guide plate by incidence surface and not easily runs off, and can promote overall backlight module efficiency.As the drawing for side is implemented in the 3rd of this creation, this incidence surface 21 is formed with rake 211 and a planar portions 212, and this planar portions 212 is vertical with bottom surface 22, also can link the effect reducing light and run off; This leaded light can as shown be and plate shapedly also can be wedge shape.Implement side as the 6th figure is depicted as the 4th of this creation, this incidence surface 21 is formed with plural rake 211, and each rake 211 is provided with connecting portion 213, and this connecting portion 213 is parallel with bottom surface 22, also can link the effect reducing light and run off; This light guide plate of Cao can as shown be and plate shapedly also can be wedge shape.Rake in above-mentioned each enforcement side and/or planar portions can be provided with plural optical microstructures, this optical microstructures can be groove that is recessed or protrusion surface, this groove can be V-arrangement or arc, and each optical microstructures can be horizontal channel and/or vertical trench, as the 5th of the 7th figure implements shown in side, take Wedge shape light conduction board as side, this rake 211 is provided with the V-arrangement vertical trench 26 that plural number protrudes surface.As the 8th figure the 6th implements shown in side, and with plate shaped light guide plate for side, incidence surface 21 is formed with rake 211 and a planar portions 212, and this rake 211 is provided with the arc vertical trench 27 on the recessed surface of plural number; This planar portions also can be provided with optical microstructures.
Claims (4)
1. a light guide plate, is characterized in that: light guide plate at least includes an incidence surface, a bottom surface crossing with this incidence surface, and an exiting surface relative with this bottom surface, and multiple pointolite is arranged at should the side of incidence surface; This incidence surface is formed with a rake and a planar portions, this planar portions and plane perpendicular, and this rake and bottom surface shape have angle, and this angle is less than 90 degree.
2. light guide plate as claimed in claim 1, is characterized in that: this rake and/or planar portions are provided with plural optical microstructures.
3. light guide plate as claimed in claim 2, is characterized in that: this optical microstructures can be the groove on recessed surface or horizontal channel or vertical trench.
4. light guide plate as claimed in claim 3, is characterized in that: this groove can be V-arrangement or arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310639859.2A CN104678479A (en) | 2013-12-02 | 2013-12-02 | Light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310639859.2A CN104678479A (en) | 2013-12-02 | 2013-12-02 | Light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104678479A true CN104678479A (en) | 2015-06-03 |
Family
ID=53313790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310639859.2A Pending CN104678479A (en) | 2013-12-02 | 2013-12-02 | Light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104678479A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094097A (en) * | 2016-08-18 | 2016-11-09 | 京东方科技集团股份有限公司 | Light guide plate and apply its backlight module, display device |
| WO2017193625A1 (en) * | 2016-05-10 | 2017-11-16 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN108445573A (en) * | 2017-02-16 | 2018-08-24 | 中强光电股份有限公司 | Optical waveguide components and display device |
| CN111650684A (en) * | 2019-03-04 | 2020-09-11 | 光耀科技股份有限公司 | Light guide plate |
-
2013
- 2013-12-02 CN CN201310639859.2A patent/CN104678479A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017193625A1 (en) * | 2016-05-10 | 2017-11-16 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US10317727B2 (en) | 2016-05-10 | 2019-06-11 | Boe Technology Group Co., Ltd. | Blacklight module and display device |
| CN106094097A (en) * | 2016-08-18 | 2016-11-09 | 京东方科技集团股份有限公司 | Light guide plate and apply its backlight module, display device |
| CN106094097B (en) * | 2016-08-18 | 2019-04-23 | 京东方科技集团股份有限公司 | Light guide plate and the backlight module using it, display device |
| CN108445573A (en) * | 2017-02-16 | 2018-08-24 | 中强光电股份有限公司 | Optical waveguide components and display device |
| CN108445573B (en) * | 2017-02-16 | 2023-06-30 | 中强光电股份有限公司 | Optical waveguide element and display device |
| CN111650684A (en) * | 2019-03-04 | 2020-09-11 | 光耀科技股份有限公司 | Light guide plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |