CN114415284B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN114415284B CN114415284B CN202210054035.8A CN202210054035A CN114415284B CN 114415284 B CN114415284 B CN 114415284B CN 202210054035 A CN202210054035 A CN 202210054035A CN 114415284 B CN114415284 B CN 114415284B
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- Prior art keywords
- backboard
- composite
- backlight module
- main body
- light guide
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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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application discloses a backlight module and a display device, wherein the backlight module comprises a composite backboard; the first light guide layer is arranged on the first side surface of the composite backboard; the second light guide layer is arranged on a second side surface of the composite backboard, and the second side surface is opposite to the first side surface; the first light source is arranged on one side surface of the first light guide layer, which is perpendicular to the composite backboard; the second light source is arranged on one side surface of the second light guide layer, which is perpendicular to the composite backboard; the composite backboard comprises a backboard main body and a reflecting part, wherein the backboard main body is provided with a hollowed-out part penetrating through the backboard main body, the reflecting part is embedded in the hollowed-out part, the reflecting part comprises a first reflecting surface facing the first light guide layer and a second reflecting surface facing the second light guide layer, and the thickness of the backlight module is greatly reduced through the arrangement of the composite backboard, so that the requirement of thickness reduction of the display device is met.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
Along with the development of display technology, display forms are also developed towards more and more diversification, and in some specific application scenarios, such as shopping malls, exhibition centers, large hotels, performance centers, cinema, teaching and research places and other application scenarios in the business display field, the traditional single-sided display can not meet the demands of people, and more electronic products are developed towards the direction of double-sided display.
In the dual-sided display device, the backlight module is required to provide a light source to realize dual-sided display, and the conventional backlight module mainly comprises a back plate, and conventional backlight structures such as a reflecting layer, a light guiding layer, a light source and the like are arranged on two sides of the back plate, so that the overall thickness of the dual-sided display device is about twice that of the single-sided backlight module, and the dual-sided display device is thicker, which is not beneficial to the development of thinning of the display device.
Disclosure of Invention
The application provides a backlight module and a display device, which solve the problem that the thickness of a double-sided display module is thicker.
In order to solve the above problems, in a first aspect, the present application provides a backlight module, including:
a composite backboard;
the first light guide layer is arranged on the first side surface of the composite backboard;
the second light guide layer is arranged on a second side surface of the composite backboard, and the second side surface is opposite to the first side surface;
the first light source is arranged on one side surface of the first light guide layer, which is perpendicular to the composite backboard;
the second light source is arranged on one side surface of the second light guide layer, which is perpendicular to the composite backboard;
the composite backboard comprises a backboard main body and a reflecting portion, wherein the backboard main body is provided with a hollowed-out portion penetrating through the backboard main body, the reflecting portion is embedded in the hollowed-out portion, and the reflecting portion comprises a first reflecting surface facing the first light guide layer and a second reflecting surface facing the second light guide layer.
In the backlight module provided by the embodiment of the application, the thicknesses of the first light guide layer and the second light guide layer are 0.3-0.4 mm.
In an embodiment of the application, the surface of the reflecting portion is flush with the surface of the back plate main body.
In the backlight module provided by the embodiment of the application, the inner side wall of the back plate main body is provided with the adhesive layer, and the reflecting part is fixed on the back plate main body through the adhesive layer.
In the backlight module provided by the embodiment of the application, the thickness of the composite backboard is 0.2-0.3 mm.
In the backlight module provided by the embodiment of the application, the material of the back plate main body is stainless steel or zinc-plated aluminum alloy.
In the backlight module provided by the embodiment of the application, the reflectivity of the first reflecting surface is the same as the reflectivity of the second reflecting surface.
In an embodiment of the application, the reflectivity of the first reflecting surface is different from the reflectivity of the second reflecting surface.
The application also provides a display device, which comprises a first display panel, a second liquid display panel and the backlight module, wherein the first display panel is arranged on one side of the first light guide layer, which is far away from the composite backboard, and the second display panel is arranged on one side of the second light guide layer, which is far away from the composite backboard.
In an embodiment of the present application, the first display panel includes a first display area, the front projection of the reflective portion on the first display panel covers the first display area, the second display panel includes a second display area, and the front projection of the reflective portion on the second display panel covers the second display area.
The beneficial effects are that: the application provides a backlight module and a display device, wherein the backlight module comprises a composite backboard, the composite backboard comprises a backboard main body and a reflecting part, the backboard main body is provided with a hollowed-out part penetrating through the backboard main body, the reflecting part is embedded in the hollowed-out part, the reflecting part comprises a first reflecting surface and a second reflecting surface which face two sides respectively, namely, the first light source and the second light source share one reflecting part to realize the transmission and the coupling-out of backlight light, and the reflecting part is embedded in the backboard main body to form the composite backboard, so that the thickness of the backlight module is greatly reduced, and the thickness reduction requirement of the display device is further met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional structure of a backlight module according to the prior art;
fig. 2 is a schematic cross-sectional structure of a backlight module according to an embodiment of the present application;
fig. 3 is a schematic plan view of a composite back plate in a backlight module according to an embodiment of the present application;
fig. 4 is a schematic cross-sectional structure of another backlight module according to an embodiment of the application;
fig. 5 is a schematic cross-sectional structure of a display device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Referring to fig. 1, a schematic cross-sectional structure of a conventional backlight module in the prior art is shown, the backlight module 100 includes a back plate 110, a first reflective layer 121 and a second reflective layer 122 are respectively disposed on opposite sides of the back plate 110, a first light guiding layer 131 is disposed on a side of the first reflective layer 121 away from the back plate 110, a second light guiding layer 132 is disposed on a side of the second reflective layer 122 away from the back plate 110, a first light source 141 is disposed at one end of the first light guiding layer 131, and a second light source 142 is disposed at one end of the second light guiding layer 132.
In order to realize the dual-sided backlight, the backlight module 100 is provided with a back plate for providing support, and conventional backlight structures are respectively disposed on two sides of the back plate, so that the backlight module has a complex structure and a thicker thickness, and cannot meet the requirement of thinning the display device.
Based on the above-mentioned problems, the embodiment of the application provides a backlight module, which is described in detail below with reference to the schematic cross-sectional structure shown in fig. 2.
The backlight module 200 includes: the composite back plate 210, the first light guide layer 221, the second light guide layer 222, the first light source 231 and the second light source 232; the first light guiding layer 221 is disposed on a first side surface of the composite back plate 210, the second light guiding layer 222 is disposed on a second side surface of the composite back plate 210, and the second side surface is opposite to the first side surface, that is, the first light guiding layer 221 and the second light guiding layer 222 are respectively disposed on two opposite side surfaces of the composite back plate 210; the first light source 231 is disposed outside a side surface of the first light guiding layer 221 perpendicular to the composite back plate 210, and is configured to couple light into the first light guiding layer 221; the second light source 232 is disposed outside a side surface of the second light guiding layer 222 perpendicular to the composite back plate 210, and is configured to couple light into the second light guiding layer 222;
specifically, the composite back plate 210 includes a back plate main body 211 and a reflective portion 212, as shown in fig. 3, the back plate main body 211 is provided with a hollow portion penetrating through the back plate main body 211, the reflective portion 212 is embedded in the hollow portion, the reflective portion 212 includes a first reflective surface R1 facing the first light guiding layer 221 and a second reflective surface R2 facing the second light guiding layer 222, wherein the back plate main body 211 is shaped like a Chinese character 'kou' and is disposed outside the composite back plate 210 for providing support and assembling with other structural layers of the composite back plate 210, and the reflective portion 212 is used for providing a double-sided reflective function.
In the backlight module provided by the embodiment, a composite back plate 210 with a special structure is provided, the composite back plate 210 combines the back plate main body 211 and the reflecting portion 212 into a whole, and the reflecting portion 212 includes a first reflecting surface and a second reflecting surface facing both sides respectively, so that the first light source 231 and the second light source 232 share the same reflecting portion 212 and assist the backlight light to conduct and couple out in the light guiding layer, thereby realizing double-sided backlight.
Further, in the backlight module provided by the embodiment of the application, the single-layer composite back plate structure is used to replace the laminated structure of the two reflecting layers and the one back plate in the prior art, so that the bending resistance of the upper and lower light guide layers is increased, the thinned light guide layers can be adapted, and the thicknesses of the first light guide layer and the second light guide layer can be set to be 0.3-0.4 mm, and the thickness of the light guide layer in the prior art is usually 0.4-0.8 mm, so that the thickness of the backlight module can be further thinned.
In some embodiments, please continue to refer to fig. 3, the shape of the reflective portion 212 should be adapted to the shape of the assembled display panel, for example, the shape of the display area of the assembled display panel of the present backlight module is generally rectangular, so the shape of the orthographic projection of the reflective portion 212 on the composite back plate is rectangular, and of course, the shape of the reflective portion 212 may be any other shape according to practical process requirements.
In some embodiments, please continue to refer to fig. 2, the thickness of the reflective portion 212 is the same as that of the back plate main body 211, so that the surface of the reflective portion 212 is flush with that of the back plate main body 211, i.e. there is no step at the position where the reflective portion 212 is spliced with the back plate main body 211, so that both sides of the composite back plate 210 have flat surfaces, which is beneficial to better assembling with other structural layers, such as the first light guiding layer 221 and the second light guiding layer 222.
In some embodiments, referring to fig. 4, in the backlight module 200, an adhesive layer 213 is disposed on an inner side wall of the back plate main body 211, the reflective portion 212 is fixed on the back plate main body 211 through the adhesive layer 213, and further, a surface of the adhesive layer 213 is flush with a surface of the back plate main body 211 and a surface of the reflective portion 212.
In some embodiments, the thickness of the composite back plate 210 is 0.2-0.3 mm, and the thickness of the composite back plate 210 is generally the same as that of the conventional back plate in the prior art, that is, the thickness of the two reflective layers is reduced compared to the backlight module provided in the prior art.
In some embodiments, the material of the back plate body is typically selected to have good mechanical properties, such as stainless steel or zinc-plated aluminum alloy, to provide good support properties to the composite back plate.
In some embodiments, according to actual process requirements, the reflectivities of the first reflective surface R1 and the second reflective surface R2 may be set to be the same, or the structure of the reflective portion 212 may be designed so that the reflectivities of the first reflective surface R1 and the second reflective surface R2 are different, so as to meet the requirement of diversification of the backlight module.
It should be noted that, in the above embodiment of the backlight module, only the above structure is described, and it is to be understood that, in addition to the above structure, any other necessary structure may be included in the backlight module provided in the embodiment of the present application as needed, and the application is not limited thereto.
Another embodiment of the present application also provides a display device, as described in detail below in conjunction with fig. 5.
The display device 300 includes a first display panel 310, a second display panel 320, and a backlight module provided in the foregoing embodiments, where the first display panel 310 is disposed on a side of the first light guiding layer 221 away from the composite back plate 210, and the second display panel 320 is disposed on a side of the second light guiding layer 222 away from the composite back plate 210.
In the display device provided in this embodiment, the first light source 231, the reflecting portion 212, and the first light guiding layer 221 are equivalent to forming a first sub-backlight, and the second light source 232, the reflecting portion 212, and the second light guiding layer 222 are equivalent to forming a second sub-backlight, and the first sub-backlight and the second sub-backlight share a reflecting portion, so that two reflecting portions are not required to be respectively and correspondingly arranged, so that the thickness of the backlight module is reduced, and the thickness of the display device is reduced.
The display device provided by the embodiment of the application can be a double-sided television, a double-sided display billboard and the like, and the embodiment of the application is not particularly limited.
In some embodiments, the first display panel 310 includes a first display area, the front projection of the reflective portion 212 on the first display panel 310 covers the first display area, the second display panel 320 includes a second display area, and the front projection of the reflective portion 212 on the second display panel 320 covers the second display area, that is, the reflective portion 212 completely covers the display areas of the first display panel 310 and the second display panel 320, so as to achieve a better backlight effect.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.
The above describes a backlight module and a display device provided by the embodiments of the present application in detail, and specific examples are applied to describe the principles and embodiments of the present application, and the description of the above embodiments is only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (8)
1. The utility model provides a backlight unit which characterized in that, backlight unit includes:
a composite backboard;
the first light guide layer is arranged on the first side surface of the composite backboard;
the second light guide layer is arranged on a second side surface of the composite backboard, and the second side surface is opposite to the first side surface;
the first light source is arranged on one side surface of the first light guide layer, which is perpendicular to the composite backboard;
the second light source is arranged on one side surface of the second light guide layer, which is perpendicular to the composite backboard;
the composite backboard comprises a backboard main body and a reflecting portion, wherein the backboard main body is provided with a hollowed-out portion penetrating through the backboard main body, the reflecting portion is embedded in the hollowed-out portion, the reflecting portion comprises a first reflecting surface facing the first light guide layer and a second reflecting surface facing the second light guide layer, the backboard main body is in a square shape and is arranged on the outer side of the composite backboard, the thickness of the reflecting portion is the same as that of the backboard main body, the surface of the reflecting portion is flush with the surface of the backboard main body, an adhesive layer is arranged on the inner side wall of the backboard main body, and the reflecting portion is fixed on the backboard main body through the adhesive layer.
2. A backlight module according to claim 1, wherein the thickness of the first light guiding layer and the second light guiding layer is 0.3-0.4 mm.
3. A backlight module according to claim 1, wherein the thickness of the composite back plate is 0.2-0.3 mm.
4. A backlight module according to claim 1, wherein the material of the back plate body is stainless steel or zinc-plated aluminum alloy.
5. A backlight module according to claim 1, wherein the reflectivity of the first reflective surface is the same as the reflectivity of the second reflective surface.
6. A backlight module according to claim 1, wherein the reflectivity of the first reflective surface is different from the reflectivity of the second reflective surface.
7. A display device, characterized in that the display device comprises a first display panel, a second display panel and the backlight module set according to any one of claims 1-6, the first display panel is arranged on one side of the first light guiding layer far away from the composite backboard, and the second display panel is arranged on one side of the second light guiding layer far away from the composite backboard.
8. The display device of claim 7, wherein the first display panel includes a first display region, wherein an orthographic projection of the reflective portion on the first display panel covers the first display region, wherein the second display panel includes a second display region, and wherein an orthographic projection of the reflective portion on the second display panel covers the second display region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210054035.8A CN114415284B (en) | 2022-01-18 | 2022-01-18 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210054035.8A CN114415284B (en) | 2022-01-18 | 2022-01-18 | Backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114415284A CN114415284A (en) | 2022-04-29 |
| CN114415284B true CN114415284B (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210054035.8A Active CN114415284B (en) | 2022-01-18 | 2022-01-18 | Backlight module and display device |
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| TW200609598A (en) * | 2004-09-03 | 2006-03-16 | Hon Hai Prec Ind Co Ltd | Backlight module capable of emitting light from two sides |
| CN101169541A (en) * | 2006-10-25 | 2008-04-30 | 中强光电股份有限公司 | Reflector plate and backlight module possessing the reflector plate |
| TW200944889A (en) * | 2008-04-28 | 2009-11-01 | Coretronic Corp | Reflecting back plate and direct type back light module |
| CN101846845A (en) * | 2009-03-23 | 2010-09-29 | 友达光电股份有限公司 | Backlight module and double-sided liquid crystal display device |
| CN106226860A (en) * | 2016-07-28 | 2016-12-14 | 奥英光电（苏州）有限公司 | Backlight module and liquid crystal display |
| CN207893558U (en) * | 2018-03-16 | 2018-09-21 | 宜昌惠科科技有限公司 | A kind of side enters light back light module unit structure |
| CN211528868U (en) * | 2020-01-19 | 2020-09-18 | 深圳市康冠商用科技有限公司 | Double-sided backlight module and display device |
-
2022
- 2022-01-18 CN CN202210054035.8A patent/CN114415284B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200609598A (en) * | 2004-09-03 | 2006-03-16 | Hon Hai Prec Ind Co Ltd | Backlight module capable of emitting light from two sides |
| CN101169541A (en) * | 2006-10-25 | 2008-04-30 | 中强光电股份有限公司 | Reflector plate and backlight module possessing the reflector plate |
| TW200944889A (en) * | 2008-04-28 | 2009-11-01 | Coretronic Corp | Reflecting back plate and direct type back light module |
| CN101846845A (en) * | 2009-03-23 | 2010-09-29 | 友达光电股份有限公司 | Backlight module and double-sided liquid crystal display device |
| CN106226860A (en) * | 2016-07-28 | 2016-12-14 | 奥英光电（苏州）有限公司 | Backlight module and liquid crystal display |
| CN207893558U (en) * | 2018-03-16 | 2018-09-21 | 宜昌惠科科技有限公司 | A kind of side enters light back light module unit structure |
| CN211528868U (en) * | 2020-01-19 | 2020-09-18 | 深圳市康冠商用科技有限公司 | Double-sided backlight module and display device |
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| Publication number | Publication date |
|---|---|
| CN114415284A (en) | 2022-04-29 |
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