CN111856815A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN111856815A CN111856815A CN202010793188.5A CN202010793188A CN111856815A CN 111856815 A CN111856815 A CN 111856815A CN 202010793188 A CN202010793188 A CN 202010793188A CN 111856815 A CN111856815 A CN 111856815A
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- quantum dot
- guide plate
- light guide
- backlight module
- light
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a backlight module which comprises a rubber frame, a light source, a light guide plate and a quantum dot film, wherein the light source is arranged on one side of the light guide plate, the quantum dot film is arranged on the upper end surface of the light guide plate, the rubber frame is arranged on the peripheries of the light guide plate and the quantum dot film, a boss is arranged on one side of the rubber frame, which faces the light guide plate, and the periphery of the quantum dot film extends out of the upper end surface of the light guide plate and extends to the boss. The invention can effectively solve the blue light leakage phenomenon caused by the failure edge of the quantum dot film and improve the display effect.
Description
Technical Field
The invention relates to the technical field of backlight, in particular to a backlight module and a display device.
Background
Quantum dots (quantum dots) are nano-scale semiconductors that emit light of a specific frequency by applying a certain electric field or light pressure to the nano-semiconductor material, and the frequency of the emitted light varies with the size of the semiconductor, so that the color of the emitted light can be controlled by adjusting the size of the nano-semiconductor, which is called quantum dots because it has a characteristic of confining electrons and Electron holes (Electron holes), which is similar to atoms or molecules in the natural world.
The quantum dot technology enables an LCD (liquid crystal display) to be realized in a wide color field, is an ideal technology for 4K-level picture information, and can greatly improve the color reproducibility, the color saturation, the overall brightness and the like of picture images. However, the quantum dot film has an unavoidable defect, namely, a part of quantum layer on the edge of the cut film material is damaged by water and oxygen, a failure edge of a certain area appears, the failure edge of the part can not excite the blue light of the blue light LED into white light, so that the blue light phenomenon exists on the periphery, and the blue light is refracted and reflected by the rubber shell and the internal structure of the backlight module, so that the blue light area is diffused, the blue light appears around the display picture of the backlight module, and the integral visual effect is influenced.
The normal quantum dot membrane is shaded and is applied to TV and flat board at present, and its LCD module frame width broad, the shading of frame is glued and can be effectively sheltered from the blue light, prevents to appear leaking the blue light phenomenon. The frame of the backlight module of the existing mobile electronic product is narrower than that of a TV and a flat-panel LCD module, and the leaked blue light cannot be absorbed by the shading adhesive tape, so that the blue phenomenon appears around the LCD module.
Disclosure of Invention
The invention aims to provide a backlight module and a display device, which can effectively solve the blue light leakage phenomenon caused by the failure edge of a quantum dot film and improve the display effect.
The utility model provides a backlight module, is including gluing frame, light source, light guide plate and quantum dot membrane, the light source sets up one side of light guide plate, the quantum dot membrane sets up the up end of light guide plate, it sets up to glue the frame the periphery of light guide plate and quantum dot membrane, glue the frame orientation one side of light guide plate is equipped with the boss, stretch out in the periphery of quantum dot membrane the up end of light guide plate extends to on the boss.
Further, the periphery of the quantum dot film is bonded with the surface of the boss through an adhesive.
Furthermore, the upper end of the rubber frame facing one side of the light guide plate is provided with a convex edge, a fixing groove for fixing the quantum dot film is formed between the convex edge and the boss, and the periphery of the quantum dot film is inserted into the fixing groove.
Further, the rubber frame is made of a PC material or a yellow quantum dot material which is made of yellow master batches.
Furthermore, a first light conversion layer is arranged on the surface of one side, facing the light guide plate, of the rubber frame.
Further, a second light conversion layer is arranged on the side face of the light guide plate.
Further, the first light conversion layer and the second light conversion layer are yellow glue layers or yellow quantum dot layers.
Further, the light source comprises a flexible circuit board and a blue light LED, the flexible circuit board is adhered to the inner side of the rubber frame, and the blue light LED is arranged on the flexible circuit board and faces the light guide plate.
Further, be equipped with the optics diaphragm on the quantum dot membrane, the optics diaphragm includes membrane and the membrane that adds lustre to down, go up the membrane that adds lustre to, add lustre to down and quantum dot membrane from top to bottom range upon range of setting.
A display device comprises the backlight module and a liquid crystal display screen arranged on the backlight module.
Compared with the prior art, the invention has the beneficial effects that: through setting up the boss on gluing the frame, the periphery of quantum dot membrane extends to on the boss for the quantum dot membrane covers the light zone of play of light guide plate completely, and the blue light that jets out from the light guide plate passes through the quantum dot membrane and arouses into white light, and the edge of quantum dot membrane is located the boss top, makes the blue light avoid the inefficacy limit of quantum dot membrane, thereby improves the phenomenon of leaking the blue light.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to a first embodiment of the invention.
Fig. 2 is a schematic structural diagram of a backlight module according to a second embodiment of the invention.
Fig. 3 is a schematic structural diagram of a backlight module according to a third embodiment of the invention.
Fig. 4 is a schematic structural diagram of a backlight module according to a fourth embodiment of the invention.
FIG. 5 is a schematic view of a light source side of the backlight module according to the present invention.
Fig. 6 is a schematic structural diagram of a display device according to the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
The backlight module and the display device are mainly applied to display modules of electronic products such as smart phones, tablet PCs and vehicles, so that the phenomenon that blue light leaks from the existing display modules is improved, and the displayed color brightness and saturation are improved.
As shown in fig. 1 and 5, in a first embodiment, the backlight module of the present invention mainly includes a rubber frame 1, a light source 2, a light guide plate 3, and a quantum dot film 4. When the light guide plate is specifically implemented, the reflecting film 5 is arranged below the light guide plate 3, light rays are emitted from the light source 2, enter the light guide plate 3 from the light incident surface, and are emitted from the light emitting surface after being reflected by the reflecting film 5. The quantum dot film 4 is disposed on the upper end surface of the light guide plate 3, and excites light emitted from the light guide plate 3 into white light. The rubber frame 1 is frame-shaped, is disposed on the outer periphery of the light guide plate 3 and the quantum dot film 4, and accommodates the light source 2 therein. Glue frame 1 and be equipped with boss 6 towards one side of light guide plate 3, the periphery of quantum dot membrane 4 stretches out the up end of light guide plate 3 and extends to on the boss 6 to make quantum dot membrane 4 cover the light-emitting area of light guide plate 3 completely, make the light of light guide plate 3 all arouse through quantum dot membrane 4 and be the white light, and the limit of failure of quantum dot membrane 4 is located boss 6, has avoided the light-emitting area of light guide plate 3, and then can avoid light to spill and produce and show badly from the limit of failure.
It should be understood that, in implementation, the height of the boss 6 is matched with that of the quantum dot film 4, so that the quantum dot film 6 can horizontally extend to the boss 6, the quantum dot film 4 is prevented from being bent, and the light effect is ensured.
In this embodiment, the periphery of the quantum dot film 4 may be bonded to the surface of the boss 6 by an adhesive, thereby fixing the quantum dot film 4.
Referring to fig. 2, in the second embodiment, a convex edge 7 is disposed at the upper end of the side of the plastic frame 1 facing the light guide plate 3, the convex edge 7 is opposite to the boss 6, and a fixing groove 8 for fixing the quantum dot film 4 is formed therebetween, so that during assembly, the periphery of the quantum dot film 4 can be inserted into the fixing groove 8, thereby fixing the quantum dot film 4, and the periphery of the quantum dot film 4 can be accommodated in the fixing groove 8, thereby further preventing the blue light from leaking out of the failure edge of the quantum dot film 4.
Referring to fig. 3, in the third embodiment, a first light conversion layer 9 is disposed on a surface of the plastic frame 1 facing the light guide plate 3. In specific implementation, the first light conversion layer 9 may be a yellow glue layer or a yellow quantum dot layer, the yellow glue layer may be formed on the surface of the glue frame 1 by spraying, and the yellow quantum dot layer may be adhered to the surface of the glue frame 1 by an adhesive or integrally formed with the glue frame 1. The first light conversion layer 9 can supplement light for blue light emitted from the side surface of the light guide plate, and the blue light is reflected by the yellow light conversion layer 9 to form white light, so that the display brightness is enhanced, and the phenomenon of blue light leakage is further reduced.
Referring to fig. 4, in the fourth embodiment, a second light conversion layer 10 is disposed on a side surface of the light guide plate 3. In a specific implementation, the second light conversion layer 10 may be a yellow glue layer or a yellow quantum dot layer, the yellow glue layer may be formed on the surface of the light guide plate 3 by spraying, and the yellow quantum dot layer may be adhered to the surface of the light guide plate 3 by an adhesive. The second light conversion layer 10 can supplement light for the blue light emitted from the side surface of the light guide plate, and the blue light forms white light after passing through the second light conversion layer 10, so that the display brightness is enhanced, and the phenomenon of blue light leakage is further reduced.
It should be noted that, in the above embodiment, the material of the rubber frame 1 preferably uses a PC (polycarbonate) material or a yellow quantum dot material made of a yellow master batch, so that the whole rubber frame 1 is yellow, and the blue light is reflected by the yellow rubber frame 1 to form white light, thereby further improving the display effect and avoiding the phenomenon of blue light leakage.
In the above embodiment, the light source 2 includes the flexible circuit board and the blue LED, the flexible circuit board is adhered to the inner side of the adhesive frame 1 by the adhesive tape or the adhesive, and the blue LED is mounted on the flexible circuit board and faces the light incident surface of the light guide plate 3. Blue light can be excited by the quantum dot film 4 to form white light.
In the above embodiment, the quantum dot film 4 is provided with the optical film, the optical film includes the upper brightness enhancement film 11 and the lower brightness enhancement film 12, and the upper brightness enhancement film 11, the lower brightness enhancement film 12, and the quantum dot film 4 are stacked from top to bottom. The upper brightness enhancement film 11 and the lower brightness enhancement film 12 are used for improving the overall brightness of the backlight module.
It should be understood that, in the above embodiment, an iron shell 14 is further included, and the iron shell 14 is disposed below the reflective film 5 and wraps the outer periphery of the rubber frame 1 to support the backlight module.
Referring to fig. 5, the present invention further provides a display device, which includes the backlight module and a liquid crystal display 13 disposed on the backlight module.
According to the invention, the boss 6 is arranged on the rubber frame 1, the periphery of the quantum dot film 4 extends to the boss 6, so that the quantum dot film 4 completely covers the light emergent area of the light guide plate 3, the blue light emitted from the light guide plate 3 is excited into white light through the quantum dot film 4, and the edge of the quantum dot film 4 is positioned above the boss 6, so that the blue light avoids the failure edge of the quantum dot film 4, and the phenomenon of blue light leakage is improved.
In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (10)
1. The utility model provides a backlight module, is including gluing frame, light source, light guide plate and quantum dot membrane, the light source sets up one side of light guide plate, the quantum dot membrane sets up the up end of light guide plate, it sets up to glue the frame the periphery of light guide plate and quantum dot membrane, its characterized in that, glue the frame orientation one side of light guide plate is equipped with the boss, the periphery of quantum dot membrane is stretched out the up end of light guide plate and is extended to on the boss.
2. The backlight module as claimed in claim 1, wherein the periphery of the quantum dot film is bonded to the surface of the boss by an adhesive.
3. The backlight module as claimed in claim 1, wherein a protruding edge is formed at an upper end of a side of the adhesive frame facing the light guide plate, a fixing groove for fixing the quantum dot film is formed between the protruding edge and the protruding stage, and a periphery of the quantum dot film is inserted into the fixing groove.
4. The backlight module according to claim 2 or 3, wherein the material of the rubber frame is a PC material or a yellow quantum dot material made of yellow master batch.
5. The backlight module as claimed in claim 1, wherein a surface of the frame facing the light guide plate is provided with a first light conversion layer.
6. The backlight module as claimed in claim 1, wherein a second light conversion layer is disposed on a side surface of the light guide plate.
7. The backlight module as claimed in claim 5 or 6, wherein the first and second light conversion layers are yellow glue layers or yellow quantum dot layers.
8. The backlight module as claimed in claim 1, wherein the light source comprises a flexible circuit board and a blue LED, the flexible circuit board is adhered to the inner side of the adhesive frame, and the blue LED is mounted on the flexible circuit board and faces the light guide plate.
9. The film assembly of claim 1, wherein an optical film is disposed on the quantum dot film, the optical film comprises an upper brightness enhancement film and a lower brightness enhancement film, and the upper brightness enhancement film, the lower brightness enhancement film, and the quantum dot film are stacked from top to bottom.
10. A display device, comprising the backlight module as claimed in any one of claims 1 to 9, and a liquid crystal display panel disposed on the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010793188.5A CN111856815B (en) | 2020-08-10 | 2020-08-10 | Backlight module and display device |
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|---|---|---|---|
| CN202010793188.5A CN111856815B (en) | 2020-08-10 | 2020-08-10 | Backlight module and display device |
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| CN111856815A true CN111856815A (en) | 2020-10-30 |
| CN111856815B CN111856815B (en) | 2021-07-02 |
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Cited By (8)
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| CN112859437A (en) * | 2021-01-22 | 2021-05-28 | 惠州Tcl移动通信有限公司 | Blue light LED backlight unit's assembly structure and display device |
| CN113223406A (en) * | 2021-05-10 | 2021-08-06 | 武汉华星光电技术有限公司 | Backlight module |
| CN113504677A (en) * | 2021-08-09 | 2021-10-15 | 重庆翰博光电有限公司 | Backlight module for preventing mini LED backlight periphery from bluing |
| CN113835266A (en) * | 2021-09-28 | 2021-12-24 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN113970860A (en) * | 2021-09-28 | 2022-01-25 | 联想(北京)有限公司 | Backlight module and display device |
| CN114241919A (en) * | 2021-12-29 | 2022-03-25 | 重庆惠科金渝光电科技有限公司 | Backlight module and display device |
| CN115116334A (en) * | 2022-07-18 | 2022-09-27 | 友达光电（昆山）有限公司 | Backlight module and display device using same |
| WO2022267058A1 (en) * | 2021-06-25 | 2022-12-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112859437A (en) * | 2021-01-22 | 2021-05-28 | 惠州Tcl移动通信有限公司 | Blue light LED backlight unit's assembly structure and display device |
| CN113223406A (en) * | 2021-05-10 | 2021-08-06 | 武汉华星光电技术有限公司 | Backlight module |
| WO2022267058A1 (en) * | 2021-06-25 | 2022-12-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN115917419A (en) * | 2021-06-25 | 2023-04-04 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US11630348B2 (en) | 2021-06-25 | 2023-04-18 | BOE MLED Technology Co., Ltd. | Backlight modules and display devices |
| CN113504677A (en) * | 2021-08-09 | 2021-10-15 | 重庆翰博光电有限公司 | Backlight module for preventing mini LED backlight periphery from bluing |
| CN113835266A (en) * | 2021-09-28 | 2021-12-24 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN113970860A (en) * | 2021-09-28 | 2022-01-25 | 联想(北京)有限公司 | Backlight module and display device |
| CN114241919A (en) * | 2021-12-29 | 2022-03-25 | 重庆惠科金渝光电科技有限公司 | Backlight module and display device |
| US11747677B2 (en) * | 2021-12-29 | 2023-09-05 | Chongqing Hkc Optoelectronics Technology Co., Ltd. | Backlight module and display device |
| CN115116334A (en) * | 2022-07-18 | 2022-09-27 | 友达光电（昆山）有限公司 | Backlight module and display device using same |
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| CN111856815B (en) | 2021-07-02 |
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