CN103364991B - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
- Publication number
- CN103364991B CN103364991B CN201310247295.8A CN201310247295A CN103364991B CN 103364991 B CN103364991 B CN 103364991B CN 201310247295 A CN201310247295 A CN 201310247295A CN 103364991 B CN103364991 B CN 103364991B
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- light
- backlight module
- guide plate
- emitting unit
- face
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Classifications
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- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
-
- 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
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
Abstract
The present invention provides a kind of backlight module and display device, belongs to Display Technique field, and it can solve the brightness of light guide plate dark space in prior art and can not be effectively improved thus the problem that causes emergent light uneven.The backlight module of the present invention includes light guide plate and multiple point source, the lower surface that described light guide plate includes light entrance face, closes on the edge part of light entrance face, light-emitting face is relative with light-emitting face, and two sides being connected with light entrance face and being clipped between light-emitting face and lower surface, the light entrance face of the plurality of point source and described light guide plate is oppositely arranged, backlight module also includes the auxiliary light emitting unit that the edge part for closing on light entrance face to light guide plate is luminous, and at least one side of auxiliary light emitting unit and described light guide plate is oppositely arranged.The present invention can make the brightness uniformity more of the emergent light of backlight module.
Description
Technical field
The invention belongs to Display Technique field, be specifically related to a kind of backlight module and display device.
Background technology
Liquid crystal display obtains extensive use with its excellent quality, but owing to liquid crystal itself is not luminous, it is necessary to a backlight module provides image to show required light.For making all to have preferably viewing effect from all angles, LCDs needs to meet the requirement of brightness homogeneity, thus requires that the brightness of the emergent light of backlight module must be uniformly.
Side entrance back module has become as the main flow of design of backlight module.But, for side entrance back module, as it is shown in figure 1, lamp bar 2 has multiple LED(LightEmittingDiode, light emitting diode) lamp 3, the adjacent spacing between LED 3 is A, owing to LED 3 has certain lighting angle α, thus causes that the edge part at light guide plate 1 produces the unlapped region 5 of transmitting light of lamp bar, i.e. dark space (hotspot, also known as Lampyridea phenomenon), the brightness of dark space is more weak, thus causing the emergent light brightness irregularities of backlight module.Along with the light efficiency of LED and the continuous of power promote, the LED quantity needed for single light guide plate constantly reduces, and lamp spacing A will constantly increase so that dark space becomes day by day serious problem.If the brightness problem of dark space can not effectively be solved, then can not import the LED of bigger light efficiency and power, and then be unfavorable for reducing the cost of product.
In the prior art, the mode that the dark space lower surface at light guide plate arranges site is adopted to improve dark space brightness.
Inventor have found that in prior art, at least there are the following problems: the dark space lower surface at light guide plate arranges site can improve the brightness of dark space to a certain extent, but dark space itself does not have the light arrival that LED directly sends, simply some reflection light arrive, in this way can not be effectively improved the brightness of dark space.
Summary of the invention
The technical problem to be solved includes, and can not be effectively improved thus the problem that causes the emergent light of backlight module uneven for the brightness of light guide plate dark space in prior art, it is provided that the more uniform backlight module of a kind of emergent light brightness and display device.
Solve the technology of the present invention problem and be employed technical scheme comprise that a kind of backlight module, it includes light guide plate and multiple point source, described light guide plate includes light entrance face, close on the light-guide edge portion of light entrance face, light-emitting face, the lower surface relative with light-emitting face and two sides being connected with light entrance face and being clipped between light-emitting face and lower surface, the light entrance face of the plurality of point source and described light guide plate is oppositely arranged, described backlight module also includes for the auxiliary light emitting unit luminous to the light-guide edge portion closing on light entrance face, at least one side of described auxiliary light emitting unit and described light guide plate is oppositely arranged.
Preferably, the plurality of point source is LED lamp bar.
Preferably, the side of the exiting surface of described auxiliary light emitting unit described light guide plate corresponding thereto is parallel.
Preferably, the lower surface launching the unlapped light-guide edge portion of light of described point source is provided with site.
Preferably, described dot density increases with the increase of jet nit point and the distance of described auxiliary light emitting unit；
And/or
The area of described site increases with the increase of jet nit point and the distance of described auxiliary light emitting unit.
Preferably, described auxiliary light emitting unit is ultraviolet leds lamp, and light-emitting face and/or the lower surface in the edge part region launching the unlapped light guide plate of light of described point source are provided with fluorescent material.
Preferably, described fluorescent material is the mixture of red, green and blue fluorescent material, or is the mixture of blue and yellow fluorescent material.
Preferably, the density of described fluorescent material increases along with the increase of fluorescent material and the distance of described auxiliary light emitting unit.
Preferably, described auxiliary light emitting unit is white LED lamp.
Backlight module provided by the invention, it is externally provided with auxiliary light emitting unit in the side of light guide plate, the edge part region directly closing on light entrance face to light guide plate due to this auxiliary light emitting unit is luminous, thus improving the more weak situation of brightness launching the unlapped region of light of lamp bar, hence in so that the emergent light brightness of light guide plate is more uniformly distributed.
The present invention also provides for a kind of display device, and described display device includes above-mentioned backlight module.
The display device of the present invention is owing to including above-mentioned backlight module, and thus the brightness of the display screen of display device is more uniformly distributed, and viewing effect is more preferably.
Accompanying drawing explanation
The dark space that Fig. 1 is light guide plate in prior art forms schematic diagram；
Fig. 2 is the structural representation of the backlight module in embodiment 1；
Fig. 3 is the B-B direction sectional view of the backlight module in Fig. 2.
Wherein accompanying drawing is labeled as: 1, light guide plate；11, light-guide edge portion；12, side；13, light entrance face；14, light-emitting face；15, lower surface；2, lamp bar；3, LED；4, auxiliary light emitting unit；5, the unlapped region of transmitting light of lamp bar；6, fluorescent material；7, site.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1:
The present embodiment provides a kind of backlight module.Fig. 2 is the structural representation of the backlight module in the present embodiment.As in figure 2 it is shown, the backlight module in the present embodiment includes light guide plate 1 and multiple point source.
Light guide plate 1 includes light entrance face 13, closes on the light-guide edge portion 11 of light entrance face 13, light-emitting face 14, the lower surface 15 relative with light-emitting face 14 and two sides 12 being connected with light entrance face 13 and be clipped between light-emitting face 14 and lower surface 15.
The light entrance face 13 of multiple point sources and light guide plate 1 is oppositely arranged.Multiple point sources are preferably a lamp bar 2, more preferably white LED lamp bar (also can replace white LED lamp bar with other light sources that can send white light), and lamp bar 2 includes each white LED lamp 3 of several white LED lamps 3(and is equivalent to a point source).The present embodiment only illustrates for white LED lamp, and the kind for point source does not limit, it is also possible to for blue LED lamp or other point sources.
Wherein, backlight module also includes being oppositely arranged at least one side of the auxiliary light emitting unit 4 to light-guide edge portion 11 luminescence closing on light entrance face 13, auxiliary light emitting unit 4 and light guide plate 1.
Preferably, in the present embodiment, as shown in Figures 2 and 3, in the unlapped region 5(of the transmitting light of lamp bar and dark space) lower surface 15 be provided with site 7.By arranging site 7, can make that the unlapped region of transmitting light 5 of lamp bar has more light to be reflected, thus improving the brightness in this region.
It is further preferred that site 7 density increases with the increase of jet nit point 7 and the distance of auxiliary light emitting unit 4 and/or the area of site 7 increases with the increase of jet nit point 7 and the distance of auxiliary light emitting unit 4.So arrange site 7 can make site 7 from auxiliary light emitting unit 4 more away from its reflection light ability more strong, the intensity of the light that auxiliary light emitting unit 4 sends from itself more away from then more weak, so the brightness of the light that the site 7 of each position reflects just is more uniformly distributed, so that the brightness of the emergent light of light guide plate 1 is more uniformly distributed.
Further preferred, auxiliary light emitting unit 4 is ultraviolet leds lamp, and this ultraviolet leds lamp is also attached on above-mentioned lamp bar 2 (namely lamp bar 2 end being bent 90 degree).The ultraviolet light sent due to ultraviolet leds lamp is black light, therefore, as shown in Figures 2 and 3, lamp bar 2 launch the light-emitting face 14 in the unlapped region of light 5 and/or lower surface 15 is provided with the lower surface launching the unlapped region of light 5 of fluorescent material 6(lamp bar to arrange the situation of fluorescent material 6 not shown in figure 3), fluorescent material 6 is preferably the mixture of red, green and blue fluorescent material, or be the mixture of blue and yellow fluorescent material, above-mentioned fluorescent material 6 can send white light under the exciting of ultraviolet leds lamp wiring, thus enhancing the brightness in this region.
The brightness of emergent light that can make light guide plate 1 by arranging the concentration of the fluorescent material 6 being coated with is more uniformly distributed.The density of the fluorescent material 6 being namely coated with increases along with the increase of fluorescent material 6 and the distance of ultraviolet leds lamp.
Being correspondingly arranged of above-mentioned site 7 and fluorescent material 6 all can so that the brightness of emergent light of light guide plate 1 be more uniformly distributed.Should be appreciated that above multiple adjustment brightness mode can individually use, it is possible to combine and use.
It is still preferred that, the side of the exiting surface of ultraviolet leds lamp light guide plate 1 corresponding thereto is parallel, and the problem in order to improve light-guide edge portion 11 brightness irregularities preferably, the light emitting anger of ultraviolet leds lamp the smaller the better (light of namely its injection is preferably only injected in the edge part region 11 of light guide plate), such as ideally lighting angle is zero, now the transmitting light of ultraviolet leds lamp can all inject the edge part region 11 of light guide plate 1, thus farthest strengthening the brightness in this region.
Adopting ultraviolet leds lamp to be because its ultraviolet light sent is black light, the optical texture of backlight module originally is not affected, but also the white light of different brightness can be sent with excitated fluorescent powder by the power of adjustment ultraviolet leds lamp, thus regulating the brightness launching the unlapped light-guide edge portion of light of lamp bar, it is possible to better and broadly realize the brightness regulation to light-guide edge portion.
The backlight module that the present embodiment provides, it is externally provided with ultraviolet leds lamp in the side 12 of light guide plate 1, directly luminous to the light-guide edge portion 11 closing on light entrance face 13 due to ultraviolet leds lamp, simultaneously again the lower surface launching the unlapped region of light 5 of lamp bar 2 be provided with from ultraviolet leds lamp more away from more can reflect the site 7 of more light, thus exciting the fluorescent material 6 of the light-emitting face 14 launching the unlapped region 5 of light and/or lower surface 15 that are coated on lamp bar to send the comparatively uniform white light of brightness, and then effectively improve this region and do not cover and cause the situation of brightness irregularities due to the light of launching of lamp bar, the brightness making the emergent light of light guide plate 1 is more uniformly distributed unanimously.
Embodiment 2:
The present embodiment provides a kind of backlight module, and its backlight module provided with embodiment 1 has similar structure, is distinctive in that, auxiliary light emitting unit 4 is preferably white LED lamp, and certainly, auxiliary light emitting unit 4 is alternatively the other light sources sending white light.
In the present embodiment, due to the existence of white LED lamp, thus improving the situation that light unlapped region 5 brightness is more weak of launching of lamp bar, and then make the light luminance in light-guide edge portion 11 comparatively uniform.Certainly, owing in the present embodiment, auxiliary light emitting unit 4 is white LED lamp, its white light sent directly as the emergent light of backlight module, can be used ultraviolet leds lamp different as auxiliary light emitting unit 4 from embodiment 1, therefore need not arrange fluorescent material 6 again.
Embodiment 3:
The present embodiment provides a kind of display device, and it includes above-mentioned backlight module, certainly also includes such as known structures such as substrates.Described display device can be: any product with display function or the parts such as display panels, Electronic Paper, mobile phone, panel computer, television set, display, notebook computer, DPF, navigator.
The display device of the present embodiment is owing to including above-mentioned backlight module, and the brightness of its emergent light is more uniformly distributed, thus the brightness of the display screen of display device is also more uniformly distributed, viewing effect is more preferably.
It is understood that the principle that is intended to be merely illustrative of the present of embodiment of above and the illustrative embodiments that adopts, but the invention is not limited in this.For those skilled in the art, without departing from the spirit and substance in the present invention, it is possible to make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (8)
1. a backlight module, including light guide plate and multiple point source, the lower surface that described light guide plate includes light entrance face, closes on the light-guide edge portion of light entrance face, light-emitting face is relative with light-emitting face, and two sides being connected with light entrance face and being clipped between light-emitting face and lower surface, the light entrance face of the plurality of point source and described light guide plate is oppositely arranged, it is characterized in that
Described backlight module also includes for the auxiliary light emitting unit luminous to the light-guide edge portion closing on light entrance face, and at least one side of described auxiliary light emitting unit and described light guide plate is oppositely arranged；
Described auxiliary light emitting unit is ultraviolet leds lamp；
Light-emitting face and/or the lower surface in the edge part region launching the unlapped light guide plate of light of described point source are provided with fluorescent material.
2. backlight module according to claim 1, it is characterised in that the plurality of point source is LED lamp bar.
3. backlight module according to claim 1, it is characterised in that the side of the exiting surface of described auxiliary light emitting unit described light guide plate corresponding thereto is parallel.
4. backlight module according to claim 1, it is characterised in that the lower surface launching the unlapped light-guide edge portion of light of described point source is provided with site.
5. backlight module according to claim 4, it is characterised in that
Described dot density increases with the increase of jet nit point and the distance of described auxiliary light emitting unit；
And/or
The area of described site increases with the increase of jet nit point and the distance of described auxiliary light emitting unit.
6. backlight module according to claim 1, it is characterised in that described fluorescent material is the mixture of red, green and blue fluorescent material, or be the mixture of blue and yellow fluorescent material.
7. backlight module according to claim 1, it is characterised in that
The density of described fluorescent material increases along with the increase of fluorescent material and the distance of described auxiliary light emitting unit.
8. a display device, it is characterised in that described display device includes the backlight module described in claim 1 to 7 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247295.8A CN103364991B (en) | 2013-06-20 | 2013-06-20 | A kind of backlight module and display device |
| PCT/CN2013/085141 WO2014201785A1 (en) | 2013-06-20 | 2013-10-12 | Backlight module and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247295.8A CN103364991B (en) | 2013-06-20 | 2013-06-20 | A kind of backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103364991A CN103364991A (en) | 2013-10-23 |
| CN103364991B true CN103364991B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310247295.8A Active CN103364991B (en) | 2013-06-20 | 2013-06-20 | A kind of backlight module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103364991B (en) |
| WO (1) | WO2014201785A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI536077B (en) * | 2014-04-09 | 2016-06-01 | 友達光電股份有限公司 | Optical assembly and back light module |
| CN104749687B (en) * | 2015-04-14 | 2017-12-12 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
| CN105987327A (en) * | 2015-07-21 | 2016-10-05 | 乐视致新电子科技（天津）有限公司 | Side-into type backlight module and display device |
Citations (5)
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| JP2005005060A (en) * | 2003-06-10 | 2005-01-06 | Sharp Corp | Illumination device and liquid crystal display device provided with it |
| CN101086577A (en) * | 2006-06-07 | 2007-12-12 | 中国科学院半导体研究所 | LCD backlight source structure of LED illumination |
| CN101122712A (en) * | 2006-08-07 | 2008-02-13 | 株式会社日立显示器 | Liquid crystal display device |
| CN101308284A (en) * | 2007-05-14 | 2008-11-19 | 奇美电子股份有限公司 | Backlight module, LCD device and its manufacture method |
| CN102401287A (en) * | 2011-07-27 | 2012-04-04 | 友达光电股份有限公司 | Backlight module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005244095A (en) * | 2004-02-27 | 2005-09-08 | Matsushita Electric Ind Co Ltd | Planar light source and liquid crystal display |
| KR20060064209A (en) * | 2004-12-08 | 2006-06-13 | 삼성전자주식회사 | Back light assembly and liquid crystal display apparatus |
-
2013
- 2013-06-20 CN CN201310247295.8A patent/CN103364991B/en active Active
- 2013-10-12 WO PCT/CN2013/085141 patent/WO2014201785A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005005060A (en) * | 2003-06-10 | 2005-01-06 | Sharp Corp | Illumination device and liquid crystal display device provided with it |
| CN101086577A (en) * | 2006-06-07 | 2007-12-12 | 中国科学院半导体研究所 | LCD backlight source structure of LED illumination |
| CN101122712A (en) * | 2006-08-07 | 2008-02-13 | 株式会社日立显示器 | Liquid crystal display device |
| CN101308284A (en) * | 2007-05-14 | 2008-11-19 | 奇美电子股份有限公司 | Backlight module, LCD device and its manufacture method |
| CN102401287A (en) * | 2011-07-27 | 2012-04-04 | 友达光电股份有限公司 | Backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103364991A (en) | 2013-10-23 |
| WO2014201785A1 (en) | 2014-12-24 |
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