CN103499052B - A kind of backlight and display unit - Google Patents
A kind of backlight and display unit Download PDFInfo
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- CN103499052B CN103499052B CN201310439865.3A CN201310439865A CN103499052B CN 103499052 B CN103499052 B CN 103499052B CN 201310439865 A CN201310439865 A CN 201310439865A CN 103499052 B CN103499052 B CN 103499052B
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- plate
- light
- backlight
- back plate
- light guide
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- 238000005452 bending Methods 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims 1
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- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- 239000013585 weight reducing agent Substances 0.000 description 1
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Abstract
The present invention relates to Display Technique field, disclose a kind of backlight and display unit, this backlight comprises: the backboard with base plate and sidewall; Be arranged at the light guide plate in described backboard; Be arranged at the lampshade of the backboard sidewall relative with described light guide plate incident side, wherein, described lampshade has lamp bar rest area, and this lamp bar rest area is relative with the base plate position of described backboard; Be arranged at the lamp bar in the lamp bar rest area of described lampshade; Be inclined in the reflecting plate of described base plate and sidewall junction, the light that described lamp bar irradiates is irradiated in light guide plate after described baffle reflection.Beneficial effect of the present invention is: the height due to lamp bar is less than the width of lamp bar, therefore adopts structure lamp bar being arranged on the position relative with the base plate of backboard, reduces the thickness of backlight, is convenient to the slimming development of display unit.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight source and a display device.
Background
At present, weight reduction, thinning and beauty are the future development trends of the display industry, and manufacturers are continuously improving the structure of the backlight source in order to achieve the purposes.
The backlight in the prior art adopts a direct type backlight design and a side type backlight design. The direct type backlight is designed based on the principle that a light source is arranged below a diffusion plate. The side-in backlight is designed by disposing a light source on the side of the light guide plate. As shown in fig. 1, fig. 1 is a schematic structural view of a side-in type backlight, wherein the backlight includes: the backlight module comprises a back plate 1, a reflector plate 2 arranged in the back plate 1, a light guide plate 3 arranged above the reflector plate 2, an optical diaphragm group 4 arranged above the light guide plate 3, a frame body 6 sleeved on the optical diaphragm group 4, and a light bar 5 arranged on the side wall of the back plate 1 opposite to the light incident side of the light guide plate 3. When the backlight module is used, light irradiated by the light bar 5 enters the light guide plate 3, one part of the light entering the light guide plate 3 is emitted from the light emitting surface of the light guide plate 3 and enters the light end diaphragm group 4, the other part of the light irradiates the reflector plate 2, is reflected by the reflector plate 2 and then enters the light guide plate 3 again and finally enters the light end diaphragm group 4, and therefore the light irradiated by the backlight source is uniformly emitted.
The defects of the prior art are as follows: because the lamp strip of the side-in type backlight source is arranged on the side wall of the back plate, the thickness of the backlight source is influenced by the size of the lamp strip, and the thinning of the display device is further influenced.
Disclosure of Invention
The invention provides a backlight source and a display device, which are used for reducing the thickness of the display device and facilitating the thinning development of the display device.
The invention provides a backlight, comprising:
a back plate having a bottom plate and sidewalls;
the light guide plate is arranged in the back plate;
the lampshade is arranged on the side wall of the back plate opposite to the light incident side of the light guide plate, and is provided with a light bar placing area which is opposite to the bottom plate of the back plate;
the lamp strip is arranged in the lamp strip placing area of the lampshade;
the reflecting plate is obliquely arranged at the joint of the bottom plate and the side wall, and light rays irradiated by the lamp strip are reflected by the reflecting plate and then irradiated into the light guide plate.
In the technical scheme, the height of the lamp strip is smaller than the width of the lamp strip, so that the lamp strip is arranged at the position opposite to the bottom plate of the back plate, the thickness of the backlight source is reduced, and the display device is convenient to develop in a thin mode.
Preferably, the connection part of the bottom plate and the side wall of the back plate is provided with a bending structure, and the reflecting plate is arranged on the bending structure of the bottom plate. The reflecting plate can be stably fixed in the back plate through the bending structure.
Preferably, the reflecting plate and the bottom plate and the side wall of the back plate are of an integral structure. The structure of the back plate is simplified, and the production of the back plate is convenient.
Preferably, the included angle between the reflecting plate and the bottom plate is 30-60 degrees. So that the light can be reflected into the light guide plate.
Preferably, the reflection plate has a plurality of saw-tooth shaped protrusions. The reflection effect of the reflection plate is further improved, and meanwhile, light is mixed in the reflection process.
Preferably, the shape of the saw-tooth shaped protrusion is triangular or arc-shaped. Has good diffuse reflection effect.
Preferably, the lampshade and the back plate are of an integral structure. The structure of the backlight source is simplified, and the production of the backlight source is facilitated.
Preferably, the lampshade and the back plate are fixedly connected by bonding or welding. By adopting split production, the back plate in the prior art can be utilized.
The invention also provides a display device comprising any one of the above backlights. The display device has a thinner thickness, which is convenient for thinning the display device.
Drawings
FIG. 1 is a schematic structural diagram of a side-in backlight in the prior art;
fig. 2 is a schematic structural diagram of a backlight source provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a backlight according to another embodiment of the present invention;
fig. 4 is a schematic connection diagram of a back plate and a lampshade provided in the embodiment of the invention;
FIG. 5 is a schematic structural diagram of a reflection plate and a back plate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a reflection plate and a lamp cover according to an embodiment of the present invention.
Reference numerals:
Detailed Description
In order to reduce the thickness of the backlight source and further facilitate the development of the thinning of the display device, the embodiment of the invention provides the backlight source and the display device. According to the technical scheme, the light bar is fixed on the light cover opposite to the bottom plate of the back plate, and the light rays irradiated by the light bar are reflected into the light guide plate through the reflecting plate, so that the thickness of the backlight source is not influenced by the width of the light bar, the thickness of the backlight source is reduced, and the thinning development of the display device is facilitated. In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below by way of non-limiting examples.
As shown in FIG. 2, FIG. 2 illustrates the structure of a backlight in some embodiments of the invention.
The backlight provided by the embodiment of the invention comprises: a back plate 10 having a bottom plate 11 and side walls 12;
a light guide plate 30 disposed in the back plate 10;
the lamp shade 70 is arranged on the side wall 12 of the back plate 10 opposite to the light incident side of the light guide plate 30, wherein the lamp shade 70 is provided with a lamp strip placing area, and the position of the lamp strip placing area is opposite to the position of the bottom plate 11 of the back plate 10;
the light bar 50 is arranged in the light bar 50 placing area of the lampshade 70;
the reflecting plate 80 is obliquely arranged at the joint of the bottom plate 11 and the side wall 12, and light rays irradiated by the light bar 50 are reflected by the reflecting plate 80 and then irradiated into the light guide plate 30.
In the above embodiment, the backlight is a side-in type backlight, and the backlight further includes: the backlight module comprises a reflector 20 arranged in a back plate 10, an optical diaphragm group 40 arranged above a light guide plate 30, and a frame 60 sleeved on the optical diaphragm group 40, wherein a lamp strip placing area of a lampshade 70 is opposite to a bottom plate 11 of the back plate 10, so that a lamp strip 50 arranged in the lamp strip 50 placing area faces the bottom plate 11, the lamp strip 50 adopts a light emitting diode as a light source, and the height of the light emitting diode is lower than the width of the light emitting diode, therefore, the structure of the embodiment can reduce the thickness of a backlight source, and is convenient for the thinning development of a display device.
Meanwhile, in the side-in backlight in the prior art, the light bar 50 is disposed on the side wall 12 of the back plate 10, and light rays irradiated by the light bar 50 directly enter the light guide plate 30, and cannot be sufficiently mixed when being irradiated into the light guide plate 30, so that a lamp shadow is formed in a side area of the display device. Compared with the backlight source in the prior art, the backlight source provided by the embodiment has the advantages that the light bar 50 is arranged in the area opposite to the bottom plate 11 of the back plate 10, most of light irradiated by the light bar 50 irradiates on the reflecting plate 80 obliquely arranged at the joint of the bottom plate 11 and the side wall 12, the irradiated light enters the light guide plate 30 after being reflected by the reflecting plate 80, the stroke of the light entering the light guide plate 30 is enhanced, the light mixing of the light before entering the light guide plate 30 is improved, the backlight source can provide uniform light, and the display effect of the display device is further improved.
Referring to fig. 5 and 6 together, the reflective plate 80 may adopt different microstructures to increase the light mixing effect, specifically, the reflective plate 80 is provided with some saw-tooth protrusions 81, the shapes of the saw-tooth protrusions 81 may be different shapes, such as triangle, arc, or other special-shaped protrusion structures, only the light emitted by the light bar 50 needs to be fully mixed and reflected into the light guide plate 30 when reflected, the protrusions may adopt strip-shaped protrusions, or granular protrusions such as cone and triangle, as long as the above purpose can be achieved.
In order to further improve the reflection of the light emitted from the light bar 50 into the light guide plate 30 by the reflection plate 80, when the reflection plate 80 is disposed, an included angle between the reflection plate 80 and the bottom plate 11 of the back plate 10 is set to be 30-60 °. Specifically, any one of angles between 30 ° and 60 °, such as 30 °, 35 °, 40 °, 50 °, 55 °, and 60 °, may be used. In the same type of backlight, the microstructures disposed on the reflective plate 80 are different, and the inclination angles at which the reflective plate 80 is disposed are also different.
The structure between the back plate 10 and the reflection plate 80 may be variously embodied, and will be described in detail with reference to specific embodiments.
Example 1
With continued reference to fig. 2, the reflective plate 80 and the back plate 10 are in a split structure, wherein the reflective plate 80 has the above-described microstructure, and the reflective plate 80 forms an angle of 30 ° to 60 ° with the bottom plate 11 of the back plate 10. Such as: 30 °, 35 °, 40 °, 50 °, 55 °, 60 °, etc. The junction of the bottom plate 11 and one side wall 12 of the back plate 10 has a bending structure 13, and the side wall is the side wall 12 located on the light incident side of the light guide plate 30. The reflection plate 80 is disposed on the bending structure 13, and specifically, the reflection plate 80 may be fixed on the reflection plate 80 by welding or adhering.
The reflecting plate 80 can be a straight plate or an arc-shaped plate, specifically, the arc-shaped plate can be different arc-shaped plates such as an arc, an elliptical arc or an irregular arc, wherein the concave area of the arc-shaped plate faces the light guide plate 30, so that light rays irradiated by the light bar 50 can irradiate the light guide plate 30 as much as possible after being reflected by the reflecting plate 80, and the loss of the light rays is avoided.
In order to further avoid the loss of light, a reflective layer is also arranged on the side wall 12 opposite to the light incident side of the light guide plate 30, so that the light irradiated to the side wall 12 after being reflected by the reflective plate 80 can be reflected into the light guide plate 30, thereby avoiding the loss of light and improving the light efficiency of the backlight source.
Or another reflecting plate 80 structure can be adopted, the reflecting plate 80 is a bent structure, a bent part and the bottom plate 11 of the back plate 10 form an included angle of 30-60 degrees, and the other bent part is attached to the side wall 12 of the back plate 10, so that light irradiated by the light bar 50 can be better reflected.
Example 2
As shown in fig. 3, fig. 3 illustrates the structure of a back plate in some embodiments of the invention. The reflecting plate 80 and the back plate 10 are of an integrated structure, that is, the reflecting plate 80 and the back plate 10 are integrally formed by stamping, at this time, a bending structure 13 is arranged at the joint of the bottom plate 11 of the back plate 10 and the side wall 12 opposite to the light incident side of the light guide plate 30, a reflecting layer is arranged on one side of the bending structure 13 located in the back plate 10, and light rays irradiated by the light bar 50 are irradiated into the light guide plate 30 after being reflected by the reflecting layer. At this time, the above-mentioned microstructure may be provided on the bending structure 13, and the microstructure is formed on the bending structure 13 by stamping or pressing, so as to increase the light reflection effect.
When the bending structure 13 is adopted, the bending angle is any angle between 30 ° and 60 °. Such as: 30 °, 35 °, 40 °, 50 °, 55 °, 60 °, etc.
When adopting bending structure 13, can adopt different bending, it is concrete, can have a transition region of bending downwards between bottom plate 11 and bending structure 13, perhaps bottom plate 11 directly bends to oblique top, the part after bending still is straight board, perhaps the part after bending is the arc, its arc can be any kind of arc structures such as circular arc, elliptical arc or irregular arc, and the arc depressed area is towards light guide plate 30, thereby make, the light that lamp strip 50 shines can be more after reflecting in light guide plate 30.
Preferably, a reflective layer is also disposed on the side wall 12 opposite to the light incident side of the light guide plate 30, so that light irradiated to the side wall 12 after being reflected by the reflective plate 80 can be reflected into the light guide plate 30, thereby avoiding light loss and improving the light efficiency of the backlight source.
In the above two embodiments, only a part of the structure of the reflection plate 80 capable of reflecting the light emitted from the light bar 50 into the light guide plate 30 is illustrated, and it should be understood that the embodiments of the present invention are not limited to the structure in the above two embodiments, and any structure of the reflection plate 80 capable of reflecting the light emitted from the light bar 50 into the light guide plate 30 can be applied to the backlight source in the embodiments of the present invention, and the operation principle thereof is the same as that of the reflection plate 80 in the above two embodiments, which is not illustrated herein.
The lampshade 70 in the embodiment of the present invention has a placement area for placing the light bar 50, and the placement area of the light bar 50 is opposite to the bottom plate 11 in the back plate 10, so as to ensure that the light emitting side of the light bar 50 faces the bottom plate 11 when the light bar 50 is placed, at this time, the direction of the backlight thickness is the height of the light emitting diodes in the light bar 50, and since the height of the light emitting diodes is lower than the width of the light emitting diodes, for example: the height of a light emitting diode of a type 3020 that is commonly used is 0.6mm, the width is 2mm, and the length is 3mm, so that the thickness of the backlight source can be effectively reduced by using the light emitting surface of the light bar 50 facing the bottom plate 11, and different structures can be used between the specific lamp shade 70 and the back plate 10, which will be described in detail below by way of example.
With reference to fig. 2, the back plate 10 and the lamp housing 70 are separate structures, wherein the back plate 10 and the lamp housing 70 are fixedly connected by means of adhesion or welding. At this time, the lamp shade 70 may be a simple bent piece, one part of the bent piece is fixedly connected to the sidewall 12 of the back plate 10, the other part of the bent piece faces the bottom plate 11 of the back plate 10, and the light bar 50 placement area of the lamp shade 70 is located at the bent part facing the bottom plate 11 of the back plate 10. Or the lamp shade 70 is provided with an upwardly protruding concave structure at the position of the placement area of the light bar 50 in addition to the bending structure 13, so that the light leakage of the light bar 50 can be improved when the light bar is placed.
With continued reference to fig. 3, the back plate 10 and the lampshade 70 are of an integral structure, and at this time, the lampshade 70 is a bent structure of the frontal wall 12 of the back plate 10 toward the inside of the back plate 10, and the bent structure may be a simple right-angle bend, and the placement area of the light bar 50 is located at the bent portion. After the bending, a position of the placement area of the light bar 50 is concave and convex upwards, so that the light leakage of the back plate 10 is improved. Referring to fig. 4, the back plate 10 and the reflective plate 80 may be integrally formed with the lamp housing 70, in which the reflective plate 80 is a bent structure 13, and the lamp housing 70 is an inward bent structure of the side wall of the back plate 10.
In order to further improve the light leakage of the backlight, the frame 60 disposed on the back plate 10 shields the gap between the back plate 10 and the light guide plate 30, thereby further improving the light leakage of the backlight and improving the display effect of the display device.
As shown in fig. 5 and 6, fig. 5 and 6 illustrate the structures of the reflection plate and the lamp housing in some embodiments. At this time, the lamp cover 70 and the reflective plate 80 are integrated and fixedly connected to the sidewall 12 of the back plate 10, and at this time, the lamp cover 70 and the reflective plate 80 are integrally formed by stamping, wherein the reflective plate 80 may further be stamped or extruded with microstructures to increase the effect of reflecting light.
The embodiment of the invention also provides a display device, which comprises any one of the backlight sources and has all the advantages of the backlight source, so that the display device provided by the embodiment of the invention has a thinner thickness and a good display effect.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A backlight, comprising:
a back plate having a bottom plate and sidewalls;
the light guide plate is arranged in the back plate;
the lampshade is arranged on the side wall of the back plate opposite to the light incident side of the light guide plate, and is provided with a light bar placing area which is opposite to the bottom plate of the back plate;
the lamp strip is arranged in the lamp strip placing area of the lampshade;
the reflecting plate is obliquely arranged at the joint of the bottom plate and the side wall, and light rays irradiated by the lamp strip are reflected by the reflecting plate and then irradiated into the light guide plate; wherein,
the connection part of the bottom plate and the side wall of the back plate is provided with a bending structure, and the reflecting plate is arranged on the bending structure of the bottom plate.
2. The backlight of claim 1, wherein the reflector is integral with the bottom plate and the sidewalls of the back plate.
3. The backlight of claim 1, wherein the reflector plate and the backplane include an angle of between 30 ° and 60 °.
4. The backlight according to any one of claims 1 to 3, wherein the reflection plate has a plurality of saw-tooth shaped protrusions.
5. The backlight of claim 4, wherein the saw-tooth shaped protrusions are triangular or arc shaped.
6. The backlight of claim 3, wherein the cover is integral with the back plate.
7. The backlight source of claim 3, wherein the lamp cover is fixedly attached to the back plate by gluing or welding.
8. A display device comprising the backlight according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439865.3A CN103499052B (en) | 2013-09-24 | 2013-09-24 | A kind of backlight and display unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439865.3A CN103499052B (en) | 2013-09-24 | 2013-09-24 | A kind of backlight and display unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103499052A CN103499052A (en) | 2014-01-08 |
| CN103499052B true CN103499052B (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310439865.3A Expired - Fee Related CN103499052B (en) | 2013-09-24 | 2013-09-24 | A kind of backlight and display unit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793282B (en) * | 2015-04-23 | 2018-02-06 | 福州大学 | The optical coupler module of edge-type light guide plate and the backlight module using the module |
| CN104777549A (en) * | 2015-04-23 | 2015-07-15 | 福州大学 | Light guide strip for liquid crystal display |
| CN105202424B (en) * | 2015-10-29 | 2018-03-02 | 京东方光科技有限公司 | Back light unit and display device |
| CN113917594A (en) * | 2021-09-08 | 2022-01-11 | 浙江吉利控股集团有限公司 | Light-emitting device and steering wheel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100562786C (en) * | 2007-03-02 | 2009-11-25 | 友达光电股份有限公司 | Light supply apparatus |
| KR102024288B1 (en) * | 2012-02-15 | 2019-09-23 | 엘지이노텍 주식회사 | Illumination system using the same |
| CN202598303U (en) * | 2012-04-12 | 2012-12-12 | 北京京东方光电科技有限公司 | Backlight module and display device |
| CN102661543B (en) * | 2012-04-27 | 2015-02-11 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN202852594U (en) * | 2012-09-05 | 2013-04-03 | 达运精密工业（苏州）有限公司 | Backlight module and liquid crystal display device applied with the same |
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- 2013-09-24 CN CN201310439865.3A patent/CN103499052B/en not_active Expired - Fee Related
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| CN103499052A (en) | 2014-01-08 |
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Granted publication date: 20150909 |