CN203825226U - Light guide plate, backlight module and display apparatus - Google Patents
Light guide plate, backlight module and display apparatus Download PDFInfo
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- CN203825226U CN203825226U CN201420261542.XU CN201420261542U CN203825226U CN 203825226 U CN203825226 U CN 203825226U CN 201420261542 U CN201420261542 U CN 201420261542U CN 203825226 U CN203825226 U CN 203825226U
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- guide plate
- light guide
- backlight module
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- 239000003292 glue Substances 0.000 claims description 15
- 239000002390 adhesive tape Substances 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000012788 optical film Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000011514 reflex Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Abstract
The utility model provides a light guide plate, a backlight module and a display apparatus. The light guide plate comprises a light emission surface, a bottom surface which is opposite to the light emission surface and a side surface which is intersected with the light emission surface and the bottom surface. The side surface comprises a first side surface and a second side surface served as a light-incident surface of the light guide plate. The light guide plate is characterized in that an included angle of the first side surface and the bottom surface is less than 90 degree. In the provided light guide plate, the included angles of the side surfaces and the bottom surface are less than 90 degree except for the light-incident surface so that other side surfaces of the light guide plate are in a wedge shape except for a light-incident side. A bottom scattering area of the light guide plate is increased so that light can emit uniformly through the corresponding side surface; a probability for the light to generate total reflection on an edge is reduced and an overlapping amount of the light is reduced too. Under the condition that a shielding area of a shading adhesive tape is not changed, local brightness increase caused by repeated refraction of a light group can be effectively avoided. Further, an incidence rate of an optical bright line of a peripheral edge of the backlight module can be effectively reduced.
Description
Technical field
The utility model relates to demonstration field, relates in particular to a kind of light guide plate, backlight module and display device.
Background technology
Liquid crystal display has the advantages such as volume is little, low in energy consumption, radiation is low, has been widely used in the equipment such as computer monitor, notebook computer, mobile phone and LCD TV.Because the display panel of liquid crystal display itself is not luminous, need backlight module to provide light source for it.The main composition assembly of backlight module comprises light emitting source at present, reflector plate, light guide plate, optical film material, glue frame and backboard etc., referring to Fig. 1, the backlight module of traditional liquid crystal indicator comprises glue frame 1 ', be positioned at the backboard 2 ' that glue frame 1 ' is arranged in order, reflector plate 3 ', light guide plate 4 ' and optical film material 5 ', optical film material 5 ' periphery at backlight module is provided with shading rubber belt (tape) 6 ', by shading rubber belt 6 ' to the absorption of light or reflex, thereby can cover the surrounding bright line of backlight module, but, when shading rubber belt 6 ' and optical film material 5 ' overlapping quantity not sufficient, backlight module is under illuminating state, still the problem that there will be " bright line " while observing with certain pitch angle, this is occur that light is gathered and repeatedly reflect overlapping phenomenon while carrying out total reflection to light guide plate edge due to light group in light guide plate, add that the light spilling in light guide plate is reflected back light guide plate generation total reflection through glue frame, particularly, referring to Fig. 2, inner at light conducting plate structure, the site 421 ' of light in light guide plate 4 ' on bottom surface 42 ' reflexes to side 43 ', incidence angle θ when the side 43 ' glazed thread in light guide plate ' be greater than 42 total reflection occurs while spending, the light of reflection penetrates by exiting surface 42 ', then make the light transmition number of path of same bright spot increase, it is the overlapping amount raising of light in unit area, cause regional luminance obviously to be strengthened, form larger luminance difference with shading rubber belt near region edge, then enter human eye visual angle and produce visual eye-catching " bright line " phenomenon.
In order further to address the above problem, can on back light source structure, increase the length of shading rubber belt, referring to Fig. 3, with this, strengthen the overlapping amount of shading rubber belt 6 ' and optical film material 5 ', light guide plate 4 ', thereby farthest cover the region that light guide plate edge may produce bright line, yet, increase shading rubber belt length and can cause the efficiency of light energy utilization to reduce, and be unfavorable for the realization of narrow frame, and fail to solve in itself the generation of " bright line " phenomenon.
Utility model content
(1) technical matters that will solve
The technical problems to be solved in the utility model is to provide a kind of light guide plate, backlight module and display device, can reduce the incidence of backlight module edge optics bright line.
(2) technical scheme
For solving the problems of the technologies described above, the technical solution of the utility model provides a kind of light guide plate, comprise exiting surface, the bottom surface relative with described exiting surface, and with the equal crossing side in described exiting surface and bottom surface, described side comprises the first side and the second side that is used as described light guide plate incidence surface, wherein, the angle of described the first side and described bottom surface is less than 90 degree.
Further, the angle of described the second side and described bottom surface is 90 degree, and the angle of described the first side and described bottom surface is 30 degree～80 degree.
For solving the problems of the technologies described above, the utility model also provides a kind of backlight module, comprises above-mentioned any one light guide plate.
Further, also comprise and be arranged on described light guide plate glue frame around, described glue frame comprises first inside surface relative with described the first side, described the first inside surface and described the first parallel sided setting.
Further, on described the first inside surface, be coated with black light-absorbing band.
For solving the problems of the technologies described above, the utility model also provides a kind of display device, comprises above-mentioned any one backlight module.
(3) beneficial effect
Side in the light guide plate that the utility model provides except incidence surface and the angle of bottom surface are all less than 90 degree, other sides that make light guide plate remove light inlet side are all wedge shape, thereby increase the bottom surface scattering area of light guide plate, make light pass through corresponding side surface outgoing even, reduce light, in edge, total reflection probability occurs, reduce the overlapping amount of light, thereby can under the prerequisite that does not change shading rubber belt dead area, effectively avoid causing local luminance to promote because light group reflects repeatedly, and then can effectively reduce the incidence of backlight module edge optics bright line.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of backlight module of the prior art;
Fig. 2 is the schematic diagram of a kind of light guide plate of the prior art;
Fig. 3 is the schematic diagram of another kind of backlight module of the prior art;
Fig. 4 to 6 is schematic diagram of a kind of light guide plate of providing of the utility model embodiment;
Fig. 7 is the schematic diagram of the another kind of light guide plate that provides of the utility model embodiment;
Fig. 8 is the schematic diagram of a kind of backlight module of providing of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
The utility model embodiment provides a kind of light guide plate, comprise exiting surface, the bottom surface relative with described exiting surface, and with the equal crossing side in described exiting surface and bottom surface, described side comprises the first side and the second side that is used as described light guide plate incidence surface, wherein, the angle of described the first side and described bottom surface is less than 90 degree.
Referring to Fig. 4, Fig. 5 and Fig. 6, light guide plate 4 comprise exiting surface 41, and the bottom surface 42 that be arranged relative with exiting surface 41 and with the equal crossing side in exiting surface 41 and bottom surface 42, particularly, the side of light guide plate comprises the first side 43, the first side 44, the first side 46 and is used as the second side 45 of light guide plate incidence surface, wherein, the second side is vertical with bottom surface, and the angle of the first side 43, the first side 44, the first 46Yu bottom surface, side is all less than 90 degree.
Particularly, referring to Fig. 7, inner at light conducting plate structure, the included angle X of the first 43Yu bottom surface, side 42 is less than 90 degree, light in light guide plate 4 reflexes to the first side 43 through 42Shang site, bottom surface 421, because the emergence angle θ at side 43 ' glazed thread is less than θ ' (θ ' be the incident angle that the angle of the first 43Yu bottom surface, side 42 equals corresponding light on 90 the first sides 43 while spending), the angle of comparing the first side and bottom surface equals the light guide plate of 90 degree, light in light guide plate is more easily derived from the first side, thereby thereby can avoid due to local reinforcement of light of causing in the first side generation total reflection.
Preferably, the angle that is used as the second 45Yu bottom surface, side 42 of incidence surface is 90 degree, and the included angle X of the first 43Yu bottom surface, side 42 is 30 degree～80 degree, such as λ, can be 45 degree, 55 degree, 65 degree etc.
Side in the light guide plate that the utility model embodiment provides except incidence surface and the angle of bottom surface are all less than 90 degree, other sides that make light guide plate remove light inlet side are all wedge shape, thereby increase the bottom surface scattering area of light guide plate, make light pass through corresponding side surface outgoing even, reduce light, in edge, total reflection probability occurs, reduce the overlapping amount of light, thereby can under the prerequisite that does not change shading rubber belt dead area, effectively avoid causing local luminance to promote because light group reflects repeatedly, and then can effectively reduce the incidence of backlight module edge optics bright line.
The utility model embodiment also provides a kind of backlight module, comprises above-mentioned light guide plate.
Referring to Fig. 8, Fig. 8 is the schematic diagram of a kind of backlight module of providing of the utility model embodiment, this backlight module comprises glue frame 1, be positioned at the backboard 2 that glue frame 1 is arranged in order, reflector plate 3, light guide plate 4 and optical film material 5, optical film material 5 peripheries at backlight module are provided with shading rubber belt (tape) 6, light guide plate 4 comprises exiting surface, relative with exiting surface and be arranged in parallel bottom surface, and first side 43 of all intersecting with exiting surface and bottom surface, the angle of the first 43Yu bottom surface, side is less than 90 degree, in addition, glue frame 1 comprises first inside surface 11 relative with described the first side 43, described the first inside surface 11 be arranged in parallel with described the first side 43.Particularly, can by light guide plate and glue frame except light inlet side three all do key groove and process, the two assembling is according to normal lug engaging, thereby can further reduce light group at the probability of light guide plate edge generation total reflection, increase, from the light number of light guide plate edge outgoing, is avoided in edge generation total reflection, causing the local reinforcement of light because of light group.
Preferably, can on the first inside surface 11, cover black light-absorbing band, wherein, this black light-absorbing band can be black one side adhesive tape (tape), this black light-absorbing band can absorb the light by the first side 43 outgoing effectively, avoid light to be reflected back light guide plate by glue frame and cause edge brightness to aggravate, then comprehensively realize bad improvement and preventions of optics such as " bright lines ", promote display quality.
The backlight module that the utility model embodiment provides, side in its light guide plate except incidence surface and the angle of bottom surface are all less than 90 degree, other sides that make light guide plate remove light inlet side are all wedge shape, thereby increase the bottom surface scattering area of light guide plate, make light pass through corresponding side surface outgoing even, reduce light, in edge, total reflection probability occurs, reduce the overlapping amount of light, thereby can under the prerequisite that does not change shading rubber belt dead area, effectively avoid causing local luminance to promote because light group reflects repeatedly, and then can effectively reduce the incidence of backlight module edge optics bright line, in addition, glue frame is done slope and is processed in corresponding position, thereby agrees with mutually with light guide plate wedge shape position, when reducing material consumption, maximally utilises the space of backlight module edge, is convenient to realize narrow frame design, have again, at the corresponding inside surface of glue frame, set up black light-absorbing band, can as far as possible effectively absorb spilling light, then comprehensively realize bad improvement and preventions of optics such as " bright lines ", reach the object that improves display quality.
The utility model embodiment also provides a kind of display device, comprises above-mentioned backlight module.Wherein, above-mentioned display device can be any product or parts with Presentation Function such as note-book computer display screen, Electronic Paper, organic light emitting diode display, liquid crystal display, LCD TV, digital album (digital photo frame), mobile phone, panel computer.
Above embodiment is only for illustrating the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that not departing from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (6)
1. a light guide plate, comprise exiting surface, the bottom surface relative with described exiting surface, and with the equal crossing side in described exiting surface and bottom surface, described side comprises the first side and the second side that is used as described light guide plate incidence surface, it is characterized in that, the angle of described the first side and described bottom surface is less than 90 degree.
2. light guide plate according to claim 1, is characterized in that, the angle of described the second side and described bottom surface is 90 degree, and the angle of described the first side and described bottom surface is 30 degree～80 degree.
3. a backlight module, is characterized in that, comprises the light guide plate as described in as arbitrary in claim 1 to 2.
4. backlight module according to claim 3, is characterized in that, also comprises and is arranged on described light guide plate glue frame around, and described glue frame comprises first inside surface relative with described the first side, described the first inside surface and described the first parallel sided setting.
5. backlight module according to claim 4, is characterized in that, on described the first inside surface, is coated with black light-absorbing band.
6. a display device, is characterized in that, comprises the backlight module as described in as arbitrary in claim 3 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261542.XU CN203825226U (en) | 2014-05-21 | 2014-05-21 | Light guide plate, backlight module and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261542.XU CN203825226U (en) | 2014-05-21 | 2014-05-21 | Light guide plate, backlight module and display apparatus |
Publications (1)
| Publication Number | Publication Date |
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| CN203825226U true CN203825226U (en) | 2014-09-10 |
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| CN201420261542.XU Expired - Fee Related CN203825226U (en) | 2014-05-21 | 2014-05-21 | Light guide plate, backlight module and display apparatus |
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| CN (1) | CN203825226U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093613A (en) * | 2015-07-30 | 2015-11-25 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN105223732A (en) * | 2015-10-23 | 2016-01-06 | 京东方光科技有限公司 | Backlight and display device |
| CN107153234A (en) * | 2017-04-28 | 2017-09-12 | 深圳市南极光电子科技有限公司 | It is a kind of to improve the back light source structure and LCDs of backlight edge bright line |
| CN107505670A (en) * | 2017-09-22 | 2017-12-22 | 京东方科技集团股份有限公司 | Backlight and display device |
| CN108885302A (en) * | 2016-03-29 | 2018-11-23 | 夏普株式会社 | Lighting device and display device |
| CN111722312A (en) * | 2019-03-22 | 2020-09-29 | 京东方科技集团股份有限公司 | Light guide plate assembly, front light source and reflective display device |
| CN113539059A (en) * | 2020-04-20 | 2021-10-22 | 华为技术有限公司 | Display screen and electronic equipment |
| CN114846272A (en) * | 2019-12-26 | 2022-08-02 | 美蓓亚三美株式会社 | Planar lighting device |
| CN115236792A (en) * | 2022-05-30 | 2022-10-25 | 达运精密工业股份有限公司 | Light guide plate and backlight module |
-
2014
- 2014-05-21 CN CN201420261542.XU patent/CN203825226U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093613A (en) * | 2015-07-30 | 2015-11-25 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN105093613B (en) * | 2015-07-30 | 2018-02-13 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US10261238B2 (en) | 2015-10-23 | 2019-04-16 | Boe Technology Group Co., Ltd. | Blacklight source and display device |
| CN105223732A (en) * | 2015-10-23 | 2016-01-06 | 京东方光科技有限公司 | Backlight and display device |
| CN105223732B (en) * | 2015-10-23 | 2018-03-16 | 京东方光科技有限公司 | Backlight and display device |
| CN108885302B (en) * | 2016-03-29 | 2020-02-18 | 夏普株式会社 | Illumination device and display device |
| CN108885302A (en) * | 2016-03-29 | 2018-11-23 | 夏普株式会社 | Lighting device and display device |
| CN107153234B (en) * | 2017-04-28 | 2019-09-13 | 深圳市南极光电子科技股份有限公司 | A kind of back light source structure and liquid crystal display improving backlight edge bright line |
| CN107153234A (en) * | 2017-04-28 | 2017-09-12 | 深圳市南极光电子科技有限公司 | It is a kind of to improve the back light source structure and LCDs of backlight edge bright line |
| CN107505670B (en) * | 2017-09-22 | 2019-06-21 | 京东方科技集团股份有限公司 | Backlight and display device |
| CN107505670A (en) * | 2017-09-22 | 2017-12-22 | 京东方科技集团股份有限公司 | Backlight and display device |
| CN111722312A (en) * | 2019-03-22 | 2020-09-29 | 京东方科技集团股份有限公司 | Light guide plate assembly, front light source and reflective display device |
| CN114846272A (en) * | 2019-12-26 | 2022-08-02 | 美蓓亚三美株式会社 | Planar lighting device |
| CN113539059A (en) * | 2020-04-20 | 2021-10-22 | 华为技术有限公司 | Display screen and electronic equipment |
| CN115236792A (en) * | 2022-05-30 | 2022-10-25 | 达运精密工业股份有限公司 | Light guide plate and backlight module |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 |
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| CF01 | Termination of patent right due to non-payment of annual fee |