CN209746313U - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN209746313U CN209746313U CN201822125145.0U CN201822125145U CN209746313U CN 209746313 U CN209746313 U CN 209746313U CN 201822125145 U CN201822125145 U CN 201822125145U CN 209746313 U CN209746313 U CN 209746313U
- Authority
- CN
- China
- Prior art keywords
- backlight module
- bottom plate
- light guide
- guide plate
- lower frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a backlight module, through setting up a reflecting surface in the light guide plate, the light that the light source sent takes place the reflection and diffusion when passing through the reflecting surface, thus can shorten the distance between light source and the light guide plate and avoid producing the bright spot, help the frivolousization of backlight module, reduce the space waste; the backlight module solves the problem that the backlight module in the prior art separates a light source and a light guide plate by a certain distance in order to avoid generating bright spots, which is not beneficial to the lightness and thinness of the backlight module.
Description
Technical Field
The utility model relates to a liquid crystal display technology field especially relates to a backlight module.
Background
The backlight module is an important component of the display, and the vehicle-mounted backlight module has higher requirements on lightness and thinness.
In the prior art, a vehicle-mounted backlight module generally adopts a structure that a light source is arranged on the side wall of a lower frame and faces the side face of a light guide plate; the light source and the light guide plate in such a structure may generate bright spots when the distance between the light source and the light guide plate is too short, so that the light source and the light incident surface of the light guide plate need to be separated by a certain distance, which is not favorable for the light weight and thinness of the backlight module.
SUMMERY OF THE UTILITY MODEL
The utility model provides a backlight module, through setting up a reflecting surface in the light guide plate, the light that the light source sent takes place the reflection diffusion when passing through the reflecting surface, thus can shorten the distance between light source and the light guide plate and avoid producing the bright spot, help the frivolousization of backlight module, reduce the space waste; the backlight module solves the problem that the backlight module in the prior art separates a light source and a light guide plate by a certain distance in order to avoid generating bright spots, which is not beneficial to the lightness and thinness of the backlight module.
The above technical purpose of the utility model is realized through following technical scheme:
A backlight module includes: the light guide plate is positioned in the lower frame; the light guide plate is provided with at least one inclined reflecting surface.
By adopting the structure, the reflecting surface is arranged in the light guide plate, and light rays emitted by the light source are reflected and diffused when passing through the reflecting surface, so that the distance between the light source and the light guide plate can be shortened, and the problem of bright spots is avoided.
Further optimization is that the reflecting surface is provided with an uneven structure.
With the above structure, the concave-convex structure is helpful for dispersing light.
Further preferably, the backlight module further comprises a light source located on the bottom plate.
By adopting the structure, the light source is arranged on the side wall, and heat is transferred to the side wall and then transferred to the bottom plate from the side wall; the light source is arranged on the bottom plate, and directly radiates heat through the bottom plate, so that the heat radiation of the backlight module is facilitated.
Further preferably, the lower frame includes at least one sidewall extending upwardly from a floor edge; the backlight module is characterized by further comprising a middle frame sleeved on the lower frame, wherein the middle frame comprises a bearing part and a side edge extending downwards from the edge of the bearing part, and the side edge comprises a first side edge abutted to the bottom plate and a second side edge wrapped on the side wall.
By adopting the structure, the lower frame is reduced from four side walls to at least one side wall, which is beneficial to the lightening and thinning of the backlight module.
Further preferably, the backlight module further comprises a middle frame sleeved on the lower frame, the middle frame comprises a bearing part and side edges extending downwards from the edge of the bearing part, and the side edges comprise four first side edges abutted to the bottom plate.
By adopting the structure, the side wall of the lower frame is eliminated, and the weight and the volume of the backlight module are further reduced.
the first side edge and the bottom plate are further optimized to be fixedly bonded through edge wrapping paper.
The edge paper is further optimized to be made of PET; the contact surface of the tipping paper, the first side edge and the bottom plate is sticky.
By adopting the structure, the thickness of the edge covering paper is far lower than that of the side wall, the assembly gap of the edge covering paper is smaller than that of the side wall and the side edge, the thickness of the backlight module can be further reduced, the narrow frame requirement of the vehicle-mounted backlight module is met, meanwhile, the light leakage of the backlight module can be prevented, dust is prevented from entering the backlight module, the structure of the edge covering paper is free, and different shapes can be made according to different requirements.
Further optimization is that the bottom plate of the lower frame is provided with a sinking groove, and the light source is positioned in the sinking groove.
Further optimization is that a main board is arranged below the raised position corresponding to the sinking groove in the bottom board.
by adopting the structure, the bottom plate of the backlight module is provided with the bulges and the sinking grooves, so that the space is fully utilized, and the light and thin backlight module is favorably realized.
The backlight module comprises a reflecting sheet, a light guide plate and an optical film which are arranged in the lower frame from bottom to top in sequence; the optical film comprises a diffusion film, a brightness enhancement film and a sun-proof film which are sequentially stacked on the upper end face of the light guide plate from bottom to top.
To sum up, the utility model discloses following beneficial effect has:
The utility model provides a backlight module, through setting up a plane of reflection in with the light guide plate, the light that the light source sent takes place the reflection diffusion when the plane of reflection to can shorten the distance between light source and the light guide plate and avoid producing the bright speck, be favorable to backlight module's frivolousization, it is extravagant to reduce the space.
Drawings
fig. 1 is a schematic diagram of a backlight module in the prior art.
Fig. 2 is a schematic view of the backlight module of the present invention, which is mainly used to illustrate the structure of the lower frame and the light guide plate.
Fig. 3 is a schematic view of an embodiment of the backlight module of the present invention, which is mainly used to illustrate the structures of the middle frame and the lower frame.
Reference numerals: 1. a lower frame; 2. a middle frame; 3. a light guide plate; 4. a light source; 5. FPC; 6. an optical film; 7. a reflective sheet; 8. wrapping paper; 9. sinking a groove; 10. a protrusion; 11. a first side edge; 12. a bearing part; 13. a second side edge; 14. a diffusion membrane; 15, a bright enhancement film; 16. a sunscreen film; 17. a base plate; 18. a side wall; 19. a relief structure.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1, the backlight module in the prior art: comprises a lower frame 1, a light source 4, an FPC5 and a middle frame 2; the lower frame 1 comprises side walls 18 and a bottom plate 17; the middle frame 2 is sleeved on the lower frame; the middle frame has a carrying portion 12 and four first side edges 11 extending downwardly from the carrying portion. The light source 4 and the FPC5 are provided on the side wall 18 of the lower frame 1. Since the bright spots are generated when the light source 4 is too close to the light guide plate 3, the light source 4 needs to be spaced apart from the light guide plate 3. Embodiments of the present invention are described below.
Example 1
As shown in fig. 2, the backlight module includes a lower frame 1, a light source 4, and a light guide plate 3; the light guide plate 3 is positioned in the lower frame 1; the light guide plate 3 is provided with at least one inclined reflecting surface; the reflecting surface in the light guide plate 3 is arranged, so that the distance between the light source and the light guide plate is shortened, and the size of the backlight module is reduced.
One end of the side edge of the light guide plate 3, which is close to the light emitting surface, is inclined towards the light source to form a concave inclined reflecting surface, and one end of the inclined reflecting surface, which is close to the light emitting surface, is higher. Of course, the inclined direction and the number of the side edge of the light guide plate and the reflective surface can be set according to the actual requirement according to the different positions of the light source, and should not be limited thereto.
Preferably, the reflecting surface is disposed on the light guide plate 3 by electroplating, and is firm and high in precision.
preferably, the inner surface of the reflecting surface is also provided with an uneven concave-convex structure 19, and light rays are further diffused on the surface of the reflecting surface; the relief structure is preferably saw-toothed.
Preferably, the backlight module comprises a reflector plate 7, a light guide plate 3 and an optical film 6 which are arranged in the lower frame 1 from bottom to top in sequence; the optical film 6 includes a diffusion film 14, a brightness enhancement film 15, and a sunscreen film 16, which are sequentially stacked from bottom to top on the upper end surface of the light guide plate 3.
Example two
In this embodiment, the structure of the lower frame 1 and the middle frame 2 in the backlight module is described on the basis of embodiment 1, and the thickness of the backlight module is further reduced by the structural design.
As shown in fig. 2, the lower frame 1 includes at least one sidewall 18 extending upward from a bottom plate 17 and a bottom plate edge; the backlight module comprises a middle frame 2 sleeved on the lower frame 1, and the middle frame 2 comprises a bearing part 12 and side edges extending downwards from the edge of the bearing part 12, wherein the side edges comprise a first side edge 11 abutted to the bottom plate and at least one second side edge 13 wrapping the side walls; the first side edge 11 and the bottom plate 17 are bonded and fixed through the edge paper 8, so that the thickness of the backlight module is reduced.
Preferably, as shown in fig. 3, the lower frame 1 is not provided with the side wall 18, and the middle frame 2 comprises a bearing part 12 and side edges extending downwards from the edge of the bearing part, wherein the side edges comprise four first side edges 11 abutted to the bottom plate; the first side 11 and the bottom plate 17 are bonded and fixed through the edge paper 8, so that the thickness of the backlight module is further reduced.
Preferably, the light source 4 is positioned on the bottom plate of the lower frame, so that heat dissipation is quicker; the light source 4 comprises an FPC5 and an LED light bar mounted on an FPC5, and the FPC5 is mounted on the bottom plate 17 through double-sided adhesive or heat-conducting adhesive; preferably, the light source 4 is a cold cathode fluorescent lamp, and has a small amount of heat generation and high brightness.
Preferably, the tipping paper 8 is made of PET; the contact surface of the tipping paper, the first side edge and the bottom plate is sticky.
The principle of the lower frame and the middle frame: as shown in fig. 1, 2 and 3, the lower frame 1 in the prior art has a bottom plate 17 and four side walls 18, and the middle frame 2 has a carrying part 12 and four second side edges 13; the sidewall 18 and the second side edge 13 are bonded by glue. By designing the lower frame 1 to comprise only the bottom plate 17 and at least one side wall 18, the rest of the side walls are eliminated, and the middle frame 2 is designed to have at least one second side edge 13 adhered to the side wall 18, and the rest of the side edges are designed to be first side edges 11 connected with the bottom plate 17 through tipping paper 8. Because of the thickness of the paper 8 of borduring is far less than the thickness of lateral wall 18, and the fitting clearance of the paper 8 of borduring is littleer than the fitting clearance of lateral wall 18 and side, and it can make backlight unit's thickness further reduce to satisfy on-vehicle backlight unit's narrow frame requirement, can also prevent the backlight unit light leak simultaneously, prevent that the dust from getting into inside the backlight unit, inside the structure of the paper of borduring is free, can make different shapes according to the demand of difference. Furthermore, the lower frame 1 does not comprise side walls 18, and the middle frame is designed such that the four first side edges 11 are connected with the bottom plate 17 through tipping paper 8.
Example 3
In this embodiment, on the basis of embodiment 1, the bottom plate 17 of the lower frame 1 is provided with the sinking groove 9 and the protrusion 10, so as to further reduce the thickness and volume of the backlight module.
As shown in fig. 2, the bottom plate 17 of the lower frame is provided with a sinking groove 9, and the light source 4 is positioned inside the sinking groove 9; a main board 14 is arranged below the position of the bulge 10 corresponding to the sinking groove 9 in the bottom board. The arrangement of the sinking groove 9 and the protrusion 10 can greatly utilize the space, which is beneficial to realizing the lightness and thinness of the backlight module.
The utility model provides a backlight module, through setting up a reflecting surface in the light guide plate, the light that the light source sent takes place the reflection diffusion when passing through the reflecting surface, thus can shorten the distance between light source and the light guide plate and avoid producing the bright spot, help the frivolousization of backlight module, reduce the space waste; the backlight module solves the problem that the backlight module in the prior art separates a light source and a light guide plate by a certain distance in order to avoid generating bright spots, which is not beneficial to the lightness and thinness of the backlight module.
The above specific embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments and the embodiments without inventive contribution as required after reading the present specification, but all the modifications are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A backlight module, comprising:
A lower frame including a bottom plate;
A light guide plate positioned in the lower frame; at least one inclined reflecting surface is arranged in the light guide plate; the reflecting surface is provided with an uneven concave-convex structure;
The backlight module also comprises a light source positioned on the bottom plate.
2. The backlight module according to claim 1, wherein the lower frame comprises at least one sidewall extending upward from an edge of the bottom plate; the backlight module is characterized by further comprising a middle frame sleeved on the lower frame, wherein the middle frame comprises a bearing part and a side edge extending downwards from the edge of the bearing part, and the side edge comprises a first side edge abutted to the bottom plate and a second side edge wrapped on the side wall.
3. The backlight module according to claim 1, further comprising a middle frame sleeved on the lower frame, wherein the middle frame comprises a carrying portion and side edges extending downward from edges of the carrying portion, and the side edges comprise four first side edges abutting on the bottom plate.
4. The backlight module as claimed in claim 2 or 3, wherein the first side edge and the bottom plate are fixed by taping paper.
5. The backlight module as claimed in claim 4, wherein the tipping paper is made of PET; the contact surface of the tipping paper, the first side edge and the bottom plate is sticky.
6. The backlight module as claimed in claim 1, wherein the bottom plate of the bottom frame is provided with a sinking groove, and the light source is disposed in the sinking groove.
7. The backlight module as claimed in claim 6, wherein a main board is mounted below the protrusion corresponding to the sinking groove in the bottom board.
8. The backlight module according to claim 1, wherein the backlight module comprises a reflector plate, a light guide plate and an optical film sequentially arranged in the lower frame from bottom to top; the optical film comprises a diffusion film, a brightness enhancement film and a sun-proof film which are sequentially stacked on the upper end face of the light guide plate from bottom to top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125145.0U CN209746313U (en) | 2018-12-18 | 2018-12-18 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125145.0U CN209746313U (en) | 2018-12-18 | 2018-12-18 | Backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209746313U true CN209746313U (en) | 2019-12-06 |
Family
ID=68703631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822125145.0U Active CN209746313U (en) | 2018-12-18 | 2018-12-18 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209746313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111708220A (en) * | 2020-06-23 | 2020-09-25 | 武汉华星光电技术有限公司 | Backlight source, display substrate and display device |
-
2018
- 2018-12-18 CN CN201822125145.0U patent/CN209746313U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111708220A (en) * | 2020-06-23 | 2020-09-25 | 武汉华星光电技术有限公司 | Backlight source, display substrate and display device |
| US11668971B2 (en) | 2020-06-23 | 2023-06-06 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Backlight and display apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3321565B1 (en) | Backlight module and display device | |
| JP4384547B2 (en) | Light guide plate having non-regular triangle lens structure | |
| US8496371B2 (en) | Backlight module | |
| JP2007080702A (en) | Backlight unit | |
| JPWO2010038516A1 (en) | Lighting device, surface light source device, and liquid crystal display device | |
| US9086594B2 (en) | Lighting device and image display device including the same | |
| JP5373180B2 (en) | Surface light source device and liquid crystal display device including the surface light source device | |
| KR101185523B1 (en) | Led flat lighting with an unified guideplate | |
| KR102303606B1 (en) | Backlight unit and display device comprising the same | |
| US20120113619A1 (en) | Light source and backlight module having the same | |
| KR20180125953A (en) | Light emitting device, display device and lighting device | |
| US20130107168A1 (en) | Backlight module and liquid crystal display | |
| TW201812414A (en) | Display device | |
| CN210835510U (en) | Backlight module and display device | |
| CN209746313U (en) | Backlight module | |
| WO2010095305A1 (en) | Illuminating device, surface light source, and liquid crystal display device | |
| JP2012220821A (en) | Light guide, lighting device, and electronic apparatus | |
| WO2017008326A1 (en) | Double-sided display | |
| CN207096639U (en) | A kind of backlight module | |
| CN100422814C (en) | Backlight module | |
| KR101747716B1 (en) | Liquid crystal display device | |
| JP3178835U (en) | Reflective sheet having light guide dots, LED flat light source, LED flat panel light, and flat panel LED light | |
| CN201434952Y (en) | Novel liquid crystal display screen device | |
| US9052542B2 (en) | Light source package and backlight unit including the light source package | |
| CN103123069A (en) | Backlight module and liquid crystal display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |