CN108873148B - Backlight module, display module and electronic equipment - Google Patents
Backlight module, display module and electronic equipment Download PDFInfo
- Publication number
- CN108873148B CN108873148B CN201810700602.6A CN201810700602A CN108873148B CN 108873148 B CN108873148 B CN 108873148B CN 201810700602 A CN201810700602 A CN 201810700602A CN 108873148 B CN108873148 B CN 108873148B
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- light
- backlight module
- fixing frame
- shielding member
- fpc
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—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
- G02B6/0091—Positioning aspects of the light source relative to the light guide
-
- 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
- G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
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- 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
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining 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 invention provides a backlight module, a display module and electronic equipment, wherein the backlight module comprises a light guide plate, a light source and a fixing frame, the light guide plate is fixedly arranged in the fixing frame, the fixing frame comprises a bottom plate and a side frame, and an open accommodating cavity is formed by one end surface of the light guide plate, the side frame of the fixing frame and the bottom plate of the fixing frame; the light source is arranged in the accommodating cavity and is arranged on the bottom plate of the fixed frame; the backlight module further comprises a light shading piece, and the light shading piece seals the accommodating cavity. In the invention, the light source is arranged on the bottom plate of the fixing frame, so that the backlight module does not need to be provided with a supporting component for supporting the FPC, thereby reducing the occupation of the supporting component on the display area and further increasing the effective display area of the display screen.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a backlight module, a display screen module and electronic equipment.
Background
At present, a backlight module is generally disposed below a display screen of a display module of an electronic device such as a mobile phone and a tablet. The existing backlight module is assembled by components such as a light guide plate, a light source, a fixing frame, etc., and the light source is usually externally connected with a Circuit board through a Flexible Printed Circuit (FPC). In order to facilitate the FPC external connection to the circuit board, the conventional backlight module generally adopts the suspension mounting manner of the FPC shown in fig. 1. In the assembly shown in fig. 1, the light emitting device 11 is disposed on the FPC12, and then both ends of the FPC12 are fixed, wherein one end of the FPC12 may be fixedly supported by the light guide plate 13, and the other end thereof may be fixedly supported by the support member 15 disposed in the fixing frame 14. This makes it necessary for the backlight unit to reserve the setting width of the supporting member 15, thereby reducing the effective display area of the display screen 16. With the development trend of the full-screen display, the effective display area of the display screen is difficult to increase based on the assembly mode shown in fig. 1.
Disclosure of Invention
The embodiment of the invention provides a backlight module, a display screen module and electronic equipment, which are used for solving the problems existing in the existing assembling mode of the backlight module.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a backlight module, including a light guide plate, a light source, and a fixing frame, where the light guide plate is fixedly disposed in the fixing frame, the fixing frame includes a bottom plate and a side frame, and an open accommodating cavity is formed by an end surface of the light guide plate, the side frame of the fixing frame, and the bottom plate of the fixing frame;
the light source is arranged in the accommodating cavity and is arranged on the bottom plate of the fixed frame;
the backlight module further comprises a light shading piece, and the light shading piece seals the accommodating cavity.
In a second aspect, an embodiment of the present invention provides a display module, which includes a display screen and the backlight module described above, where the backlight module is disposed below the display screen.
In a third aspect, an embodiment of the present invention provides an electronic device, including the display module described above.
In the embodiment of the invention, the light source is arranged on the bottom plate of the fixing frame, so that the backlight module of the embodiment of the invention does not need to be provided with a supporting component for supporting the FPC, the occupation of the supporting component on the display area can be reduced, and the effective display area of the display screen can be further increased.
Drawings
FIG. 1 is a schematic structural diagram of a conventional backlight module;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the invention;
fig. 3 is a second schematic structural diagram of a backlight module according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2 to 3, an embodiment of the invention provides a backlight module, which includes a light guide plate 21, a light source and a fixing frame 23, wherein the light guide plate 21 is fixedly disposed in the fixing frame 23, the fixing frame 23 includes a bottom plate 231 and a side frame 232, and an open accommodating cavity is formed by an end surface of the light guide plate 21, the side frame 232 of the fixing frame 23 and the bottom plate 231 of the fixing frame 23. The light source is disposed in the accommodating cavity and disposed on the bottom plate 231 of the fixing frame 23. The backlight module further comprises a light shielding piece 25, and the light shielding piece 25 seals the accommodating cavity.
Wherein, an open accommodating cavity is formed by an end surface of the light guide plate 21, the side frame 232 of the fixing frame 23 and the bottom plate 231 of the fixing frame 23, and the light source can be easily assembled into the accommodating cavity due to the open arrangement of the accommodating cavity.
Wherein, the light source is disposed on the bottom plate 231 of the fixing frame 23, and the bottom plate 231 of the fixing frame 23 can provide a flat supporting surface for the light source, so that the stability of the light source assembly can be improved.
Wherein the light shield 25 can be fixedly arranged. Here, the light-shielding member 25 is fixedly disposed, and it is understood that the light-shielding member 25 is fixedly disposed with respect to the backlight module, and the light-shielding member 25 is fixedly disposed in various manners, for example, the light-shielding member 25 is fixedly disposed on the fixing frame 23, the light-shielding member 25 is fixedly disposed on the light guide plate 21, the light-shielding member 25 is fixedly disposed with both the fixing frame 23 and the light guide plate 21, and so on.
The light shielding member 25 seals the accommodating cavity, and it can be understood that the light shielding member 25 covers an opening of the accommodating cavity, or the light shielding member 25 fills other spaces except for the space occupied by the light source in the accommodating cavity. Therefore, light emitted by the light source can be prevented from diffusing to the outside of the backlight module through the opening of the accommodating cavity, meanwhile, the light loss of the light source can be reduced, and more light can enter the light guide plate 21.
Here, the light source may consume energy, such as electric power, and elements or lines electrically connected to the light source may be provided on the bottom plate 231 of the fixing frame 23, and the light source may be electrically connected to a power source through the elements or lines, thereby supplying the power to the light source.
As can be seen from the above, the backlight module according to the embodiment of the invention is assembled by placing the light source into the accommodating cavity between the side frame 232 of the fixing frame 23 and the end surface of the light guide plate 21 from the opening between the side frame 232 of the fixing frame 23 and the end surface of the light guide plate 21, and disposing the light source on the bottom plate 231 of the fixing frame 23. Meanwhile, a shading piece for sealing the accommodating cavity is arranged to prevent the backlight module from light leakage. The following differences exist in the way of assembling the backlight module shown in fig. 1: in fig. 1, the light emitting device 11 and the FPC12 are suspended at an opening between the side frame of the fixing frame 14 and the end surface of the light guide plate 13, and the supporting member 15 needs to be disposed below the FPC12, so that the backlight module needs to reserve the setting width of the supporting member 15, thereby reducing the effective display area of the display screen. In the embodiment of the present invention, since the bottom plate 231 of the fixing frame 23 can provide a support for the light source, the backlight module of the embodiment of the present invention does not need to additionally provide a supporting member, so that the occupation of the supporting member on the display area can be reduced, and the effective display area of the display screen 27 can be further increased.
Optionally, the light source includes an FPC24 and a light emitting device 22 disposed on an FPC24, the light emitting device 22 is electrically connected to the FPC24, and the FPC24 is disposed on the bottom plate 231 of the fixing frame 23; the side frame 232 of the fixing frame 23 is provided with an opening through which the FPC24 extends.
This embodiment is a specific embodiment of the light source, and provides the light emitting device 22 with electric power required for light emission by disposing the light emitting device 22 on the FPC24 and extending the FPC24 out of the fixing frame 23 to the external circuit board. The side frame 232 of the fixing frame 23 is provided with an opening for the FPC24 to extend out, and the size of the opening is preferably matched with the size of the FPC24, so as to prevent light emitted by the light emitting device 22 from leaking from a gap between the FPC24 and the fixing frame 23. Alternatively, it is also contemplated to provide a shield at the gap between FPC24 and frame 23 to prevent light from escaping through the gap.
One surface of the light emitting device 22 facing the light guide plate 21 may be a light emitting surface, so that most of the light emitted by the light emitting device 22 is ensured to be incident into the light guide plate 21. The light emitting device 22 may be an LED lamp.
Alternatively, the FPC24 may be adhesively fixed to the bottom plate of the fixing frame 23 by the first adhesive layer 30.
Alternatively, a part of the FPC24 may extend to the bottom of the light guide plate 21, so that the bottom plate 231 of the fixing frame 23 may be disposed to protrude outward at a portion where the FPC24 is disposed, relative to other portions.
Alternatively, the FPC24 may be adhered to the light guide plate 21 at a portion extending to the bottom of the light guide plate 21 by the second adhesive layer 31.
Optionally, the light shielding member 25 is provided with an extension portion 251 at the position of the opening, and the extension portion 251 extends toward the FPC24 to be in contact with the FPC 24.
By providing the extension portion 251 extending to the FPC24 in the light-shielding member 25, light emitted from the light-emitting device 22 can be effectively shielded and isolated.
Of course, the light-shielding member 25 may be provided with the extension 251 at other positions, besides the extension 251 at the position of the opening, or the extension 251 may be provided in the entire width direction of the light-shielding member 25 (i.e., the light-shielding member 25 is formed in an L shape). The extension 251 of the light shielding member 25 can be attached to the side frame 232 of the fixing frame 23 and extend to contact with the FPC24, so that the side frame 232 of the fixing frame 23 can support the extension 251 of the light shielding member 25, and the extension 251 of the light shielding member 25 can directly shield the opening, thereby further improving the light shielding effect.
Accordingly, the extension 251 may also be attached to the surface of the light emitting device 22 to extend to contact the FPC 24. In this way, the extension 251 may coat the surface of the light emitting device 22, thereby further improving the light blocking effect.
In addition, the extension 251 of the light shielding member 25 may cover any other exposed surface of the light emitting device 22, in addition to the light emitting surface of the light emitting device 22 facing the light guide plate 21, to further improve the light shielding effect.
Optionally, the light shield 25 is stacked on the light source. When the light source includes the above-described light emitting device 22 and FPC24, the light-shielding member 25 is stacked on the light emitting device 22.
Thus, the light emitting device 22 can support the light shielding member 25. Thereby making the light-shielding member 25 more stably disposed in the backlight module. Of course, when the light shielding member 25 has a light weight, the light shielding member 25 may not be stacked on the light source, or the light shielding member 25 and the light source may have a space therebetween, and in this case, the light shielding member 25 may be combined with the fixing frame 23 and the light guide plate 21 by means of a surface thereof, thereby achieving the fixing of the light shielding member 25.
Alternatively, one end of the light shielding member 25 abuts against the side frame 232 of the fixing frame 23, and the other end of the light shielding member 25 abuts against the end surface of the light guide plate 21.
When the light-shielding member 25 is stacked on the light source, the two ends of the light-shielding member 25 are respectively abutted against the side frame 232 of the fixing frame 23 and the end surface of the light guide plate 21, so that the stability of fixing the light-shielding member 25 can be further improved.
Optionally, the backlight module further includes a light-shielding adhesive layer 26, the light-shielding adhesive layer 26 extends from the surface of the light-shielding member 25 to the side frame 232 of the fixing frame 23, and the light-shielding adhesive layer 26 covers the joint between the light-shielding member 25 and the fixing frame 23.
In this way, the light-shielding adhesive layer 26 can not only improve the stability of fixing the light-shielding member 25, but also further improve the light-shielding effect.
Alternatively, the light shielding member 25 is made of a heat conductive material.
Considering that the light source generates heat during the light emitting process, the light shielding member 25 may be made of a heat conductive material, so that the heat generated by the light source during operation can be conducted to the outside of the backlight module through the light shielding member 25. Especially for the embodiment where the light shielding member 25 is provided with the extension portion 251, the extension portion 251 and the light shielding member 25 together cover the light emitting device 22, the light shielding member 25 has thermal conductivity, which is beneficial for conducting heat generated by the light emitting device 22 out in time. In addition to having a heat conductive property, the light shielding member 25 should also have a good light shielding property and a good insulating property, for example, gypsum, heat conductive silicone grease, heat conductive silicone, etc.
Because of good thermal conductivity, insulation and flexibility, the heat-conducting silica gel is not only favorable for heat dissipation, but also capable of protecting the light-emitting device 22 and preventing the light-emitting device 22 from being damaged by collision. In addition, the flexibility of the heat-conducting silica gel has stronger tolerance to assembly tolerance, so that the backlight module provided by the embodiment of the invention is more convenient to assemble. Based on this, the light shielding member 25 may be made of heat conductive silicone.
Optionally, the fixing frame 23 may be a metal frame, which is beneficial to heat dissipation of the backlight module.
In addition, the backlight module according to the embodiment of the invention may further include other components, for example, a reflective film 35 disposed between the light guide plate 21 and the bottom plate 231 of the fixing frame 23, a diffusion film 33 and a brightness enhancement film 34 disposed on the top of the light guide plate 21, a black adhesive layer 32 disposed between the diffusion film 33 and the light-shielding adhesive layer 26, and the like.
The embodiment of the invention also provides a display module, which comprises a display screen 27 and any one of the backlight modules in the embodiment of the invention, wherein the backlight module is arranged below the display screen 27.
The display module may further include a touch cover 28 disposed above the display screen 27, and the touch cover 28 may be connected and fixed with the display screen 27 through an optical adhesive layer 29.
The embodiment of the invention also provides electronic equipment which comprises any display module in the embodiment of the invention.
In an embodiment of the present invention, the electronic Device may be a Computer (Computer), a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal digital assistant (PDA for short), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), an electronic reader, a navigator, a digital camera, and the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A backlight module comprises a light guide plate, a light source and a fixing frame, wherein the light guide plate is fixedly arranged in the fixing frame,
the side end face of the light guide plate, the side frame of the fixing frame and the bottom plate of the fixing frame form an open accommodating cavity;
the light source is arranged in the accommodating cavity and is arranged on the bottom plate of the fixed frame;
the backlight module further comprises a light shading piece, the light shading piece seals the containing cavity, the light shading piece has flexibility, the light shading piece is in abutting joint with the side frame of the fixing frame, the light shading piece is also in abutting joint with the side end face of the light guide plate, and at least part of the light shading piece is located on the upper portion of the light source.
2. The backlight module according to claim 1, wherein the light source comprises a flexible circuit board (FPC) and a light emitting device disposed on the FPC, the light emitting device is electrically connected to the FPC, and the FPC is disposed on the bottom plate of the fixing frame;
and an opening for the FPC to extend out is formed in the side frame of the fixing frame.
3. A backlight module according to claim 2, wherein the light shielding member is provided with an extending portion at a position of the opening, the extending portion extending toward the FPC to contact with the FPC.
4. A backlight module according to claim 3, wherein the extension part is attached to the surface of the light emitting device and extends to contact with the FPC.
5. The backlight module as claimed in claim 1, wherein the light shielding member is stacked on the light source.
6. The backlight module according to claim 5, further comprising a light-shielding adhesive layer extending from the surface of the light-shielding member to the side frame of the fixing frame, wherein the light-shielding adhesive layer covers a joint of the light-shielding member and the fixing frame.
7. A backlight module according to claim 1, wherein the light-shielding member is made of a heat conductive material.
8. The backlight module as claimed in claim 7, wherein the light shielding member is made of thermally conductive silicone.
9. A display module comprising a display screen and the backlight module of any one of claims 1 to 8, wherein the backlight module is disposed below the display screen.
10. An electronic device comprising the display module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810700602.6A CN108873148B (en) | 2018-06-29 | 2018-06-29 | Backlight module, display module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810700602.6A CN108873148B (en) | 2018-06-29 | 2018-06-29 | Backlight module, display module and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108873148A CN108873148A (en) | 2018-11-23 |
| CN108873148B true CN108873148B (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810700602.6A Active CN108873148B (en) | 2018-06-29 | 2018-06-29 | Backlight module, display module and electronic equipment |
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| CN (1) | CN108873148B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286515B (en) * | 2019-06-30 | 2022-04-15 | Oppo广东移动通信有限公司 | Electronic device and control method thereof |
| CN114035371A (en) * | 2021-10-12 | 2022-02-11 | 深圳市南极光电子科技股份有限公司 | Backlight module, preparation process thereof and display device |
| TWI822134B (en) | 2022-06-22 | 2023-11-11 | 群光電能科技股份有限公司 | Backlight module |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205899204U (en) * | 2016-07-25 | 2017-01-18 | 信利半导体有限公司 | Backlight source |
| CN106773284A (en) * | 2016-11-28 | 2017-05-31 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN206725898U (en) * | 2017-04-13 | 2017-12-08 | 芜湖德仓光电有限公司 | A kind of back light module unit structure |
| CN206684440U (en) * | 2017-05-11 | 2017-11-28 | 信利半导体有限公司 | A kind of backlight and liquid crystal display die set |
| CN206710746U (en) * | 2017-05-18 | 2017-12-05 | 信利半导体有限公司 | A kind of backlight module |
| CN207249290U (en) * | 2017-09-18 | 2018-04-17 | 信利半导体有限公司 | A kind of backlight module and liquid crystal display die set |
| CN207334427U (en) * | 2017-09-20 | 2018-05-08 | 深圳市风谷创新技术有限公司 | High brightness touch display screen |
| CN108037620B (en) * | 2018-01-31 | 2023-09-01 | Oppo广东移动通信有限公司 | Backlight module, electronic device and mounting method of backlight module |
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| CN108873148A (en) | 2018-11-23 |
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