CN220438716U - Backlight module capable of improving light coupling efficiency of LED - Google Patents
Backlight module capable of improving light coupling efficiency of LED Download PDFInfo
- Publication number
- CN220438716U CN220438716U CN202322102607.8U CN202322102607U CN220438716U CN 220438716 U CN220438716 U CN 220438716U CN 202322102607 U CN202322102607 U CN 202322102607U CN 220438716 U CN220438716 U CN 220438716U
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- backlight module
- led
- light
- guide plate
- limiting cavity
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- 238000010168 coupling process Methods 0.000 title claims abstract description 26
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- 239000011247 coating layer Substances 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims description 14
- 238000009792 diffusion process Methods 0.000 claims description 10
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- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The utility model discloses a backlight module capable of improving the light coupling efficiency of an LED, which comprises: the backlight module comprises a fixed frame and a backlight module, wherein a limiting cavity is arranged on the fixed frame; the backlight assembly comprises a light guide plate and a light source piece, wherein the light guide plate is accommodated in the limiting cavity, the light source piece is arranged on the side wall of the limiting cavity, the light source piece comprises an LED, the LED is positioned on one side of the light guide plate, and a low-reflectivity AR coating layer is arranged on one side wall of the light guide plate facing the LED. According to the backlight module capable of improving the light coupling efficiency of the LED, the low-reflectivity AR coating layer is arranged on the side wall, facing the LED, of the light guide plate, so that the loss of light caused by reflection can be reduced through the low-reflectivity AR coating layer, the light coupling efficiency of the LED can be improved, and the purposes of improving the brightness of the backlight module or reducing the power consumption of the backlight module are achieved.
Description
Technical Field
The utility model relates to the technical field of display, in particular to a backlight module capable of improving light coupling efficiency of an LED.
Background
In the display technology industry, the main stream of display screens is mainly a passive luminous LCD ((Liquid Crystal Display)) liquid crystal display screen, and the maximum power consumption of the LCD liquid crystal display screen is derived from an LED (light emitting diode) backlight module, and the backlight module is used for providing a light source for the LCD liquid crystal display screen. The brightness requirements of the existing automobile manufacturers on the display module are higher and higher, namely the brightness of the backlight module is higher and higher, the brightness of the LED backlight module is closely related to the light coupling efficiency of the LED light source, the light coupling efficiency refers to the light energy ratio lost in the light coupling process, so that the higher the coupling efficiency of the LED light in the backlight module is, the smaller the loss of the light is, the lower the coupling efficiency of the LED light is, and the larger the loss of the light is.
Therefore, how to improve the coupling efficiency of the LED light, so as to improve the brightness of the backlight module or reduce the power consumption of the backlight module is a technical problem that needs to be solved by the research and development personnel in the field.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a backlight module capable of improving the light coupling efficiency of LEDs, so that the brightness of the backlight module is improved or the power consumption of the backlight module is reduced.
The aim of the utility model is realized by the following technical scheme:
a backlight module capable of improving light coupling efficiency of an LED comprises: the backlight module comprises a fixed frame and a backlight module, wherein a limiting cavity is arranged on the fixed frame; the backlight assembly comprises a light guide plate and a light source piece, wherein the light guide plate is accommodated in the limiting cavity, the light source piece is arranged on the side wall of the limiting cavity, the light source piece comprises an LED, the LED is positioned on one side of the light guide plate, and a low-reflectivity AR coating layer is arranged on one side wall of the light guide plate facing the LED.
In one embodiment, the low reflectivity AR coating layer has a reflectivity of 0.3%.
In one embodiment, the low-reflectivity AR coating layer includes a plurality of SiO2 film layers and a plurality of Nb2O5 film layers, and each of the SiO2 film layers is alternately stacked with each of the Nb2O5 film layers.
In one embodiment, the low reflectivity AR coating layer has a thickness of 300nm.
In one embodiment, the light source part further comprises an FPC, the LED is connected with the FPC, a side surface, away from the LED, of the FPC is provided with a heat-conducting double-sided adhesive tape, and the heat-conducting double-sided adhesive tape is arranged on the side wall of the limiting cavity.
In one embodiment, the backlight assembly further includes a reflective film disposed on a side surface of the light guide plate adjacent to the sidewall of the limiting cavity.
In one embodiment, the backlight assembly further includes a dual brightness enhancement film, a lower brightness enhancement film, and a diffusion film, wherein the dual brightness enhancement film, the lower brightness enhancement film, and the diffusion film are stacked in sequence, and the diffusion film abuts against a side surface of the light guide plate.
In one embodiment, the fixing frame comprises a rubber frame and a lower iron frame, and the rubber frame and the lower iron frame are buckled to form a limiting cavity.
In one embodiment, a foam double-sided adhesive is arranged on one side surface of the rubber frame, which is far away from the limiting cavity.
In one embodiment, a limiting protruding portion is arranged on one side, facing the limiting cavity, of the rubber frame.
Compared with the prior art, the utility model has at least the following advantages:
according to the backlight module capable of improving the light coupling efficiency of the LED, the low-reflectivity AR coating layer is arranged on the side wall, facing the LED, of the light guide plate, so that the loss of light caused by reflection can be reduced through the low-reflectivity AR coating layer, the light coupling efficiency of the LED can be improved, and the effects of improving the brightness of the backlight module or reducing the power consumption of the backlight module are achieved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described.
FIG. 1 is a schematic diagram of a backlight module capable of improving the coupling efficiency of LED light according to an embodiment of the utility model;
fig. 2 is a schematic diagram of a partial enlarged structure of a portion a of the backlight module in fig. 1, which can improve the coupling efficiency of the LED light.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings.
Referring to fig. 1 and 2, a backlight module 10 capable of improving light coupling efficiency of an LED (light emitting diode) includes: a fixed frame and a backlight assembly, wherein the fixed frame is provided with a limiting cavity 110; the backlight assembly comprises a light guide plate 210 and a light source piece 220, wherein the light guide plate 210 is accommodated in the limiting cavity 110, the light source piece 220 is arranged on the side wall of the limiting cavity 110, the light source piece 220 comprises an LED221, the LED221 is positioned on one side of the light guide plate, and a low-reflectivity AR coating layer 211 is arranged on one side wall, facing the LED221, of the light guide plate 210.
It should be noted that, the backlight assembly is limited and fixed by the limiting cavity 110, and the LED221, that is, the LED light bar, specifically, in order to improve the light coupling efficiency of the LED, a layer of low-reflectivity AR coating layer 211 is coated on a side surface of the light guide plate facing the LED light bar, that is, the low-reflectivity AR coating layer 211 is coated on the surface of the light incident surface of the light guide plate corresponding to the LED, so that the light loss caused by reflection can be reduced, thereby improving the light coupling efficiency of the LED, achieving the purpose of improving the brightness of the backlight module, and further reducing the power consumption of the backlight module after reducing the light loss. Preferably, the low-reflectivity AR coating layer has a reflectivity of 0.3%, and the low-reflectivity AR coating layer has a thickness of 300nm, and correspondingly, the low-reflectivity AR coating layer includes a plurality of SiO2 film layers and a plurality of Nb2O5 film layers, each SiO2 film layer is alternately stacked with each Nb2O5 film layer, specifically, the SiO2 film layer is provided with four layers, the Nb2O5 film layer is provided with three layers, and the stacked structure of the low-reflectivity AR coating layer is: the low-reflectivity AR coating layer with the structure has the advantages that the reflectivity is 0.3%, so that the light coupling efficiency of the LED is improved to the greatest extent, and the light loss is reduced.
In an embodiment, the light source piece 220 further includes an FPC (flexible circuit board) 222, the LED221 is connected with the FPC222, a heat-conducting double-sided tape 223 is disposed on a side surface of the FPC222 far away from the LED221, the heat-conducting double-sided tape 223 is disposed on a side wall of the limiting cavity 110, and a heat dissipation effect is achieved through the heat-conducting double-sided tape 223, so that the service lives of the LED221 and the FPC can be prolonged.
Further, the backlight assembly further includes a reflective film 230, and the reflective film 230 is disposed on a side surface of the light guide plate 210 adjacent to the sidewall of the limiting cavity 110. The reflection film can improve the reflectivity of the optical surface, increase the brightness of the backlight module and reduce the loss of the light source.
Further, the backlight assembly further includes a Dual Brightness Enhancement Film (DBEF) 240, a lower brightness enhancement film 250, and a diffusion film 260, wherein the dual brightness enhancement film 240, the lower brightness enhancement film 250, and the diffusion film 260 are stacked in sequence, and the diffusion film 260 is abutted against one side surface of the light guide plate 210.
It should be noted that, the dual brightness enhancement film 240 can enhance brightness in the whole viewing range of the display screen, and similarly, the lower brightness enhancement film and the diffusion film can enhance the whole brightness of the display screen, so that light can be uniformly diffused.
Further, the fixed frame includes a rubber frame 120 and a lower iron frame 130, and the rubber frame 120 and the lower iron frame 130 are buckled to form a limiting cavity 110.
It should be noted that, the rubber frame 120 is buckled with the lower iron frame 130 to form the limiting cavity 110, specifically, a limiting groove is formed on the peripheral side wall of the rubber frame 120, and similarly, a limiting bump is formed on the side wall of the lower iron frame 130, and after the rubber frame 120 is buckled with the lower iron frame 130, the limiting bump is located in the limiting groove to form a limiting fixing function.
Further, the rubber frame 120 is provided with a foam double-sided adhesive 121 on a side surface far away from the limiting cavity 110, the foam double-sided adhesive 121 is in an annular structure, the middle is hollowed to avoid a display area of the display screen, and the foam double-sided adhesive 121 plays a role in preventing light leakage, so that the overall brightness of the display area of the display screen can be further improved.
Further, a limiting protrusion 122 is disposed on a side of the glue frame 120 facing the limiting cavity 110, and the limiting protrusion 122 limits each backlight film material and the light guide plate in the backlight assembly, so as to prevent each component from shaking and affecting the display quality.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model, which are within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (9)
1. A backlight module capable of improving light coupling efficiency of an LED is characterized by comprising:
the fixed frame is provided with a limiting cavity; and
The backlight assembly comprises a light guide plate and a light source piece, wherein the light guide plate is accommodated in the limiting cavity, the light source piece is arranged on the side wall of the limiting cavity, the light source piece comprises an LED (light emitting diode), the LED is positioned on one side of the light guide plate, and a low-reflectivity AR coating layer is arranged on one side wall, facing the LED, of the light guide plate;
the reflectivity of the low-reflectivity AR coating layer is 0.3%.
2. The backlight module according to claim 1, wherein the low-reflectivity AR coating layer comprises a plurality of SiO2 film layers and a plurality of Nb2O5 film layers, and each SiO2 film layer is alternately stacked with each Nb2O5 film layer.
3. The backlight module for improving the coupling efficiency of light rays of an LED according to claim 2, wherein the thickness of the low-reflectivity AR coating layer is 300nm.
4. The backlight module capable of improving light coupling efficiency of an LED according to claim 3, wherein the light source part further comprises an FPC, the LED is connected with the FPC, a side surface of the FPC, which is far away from the LED, is provided with a heat-conducting double-sided adhesive, and the heat-conducting double-sided adhesive is arranged on the side wall of the limiting cavity.
5. The backlight module according to claim 1, wherein the backlight module further comprises a reflective film disposed on a side surface of the light guide plate adjacent to the side wall of the limiting cavity.
6. The backlight module according to claim 1, wherein the backlight module further comprises a dual brightness enhancement film, a lower brightness enhancement film and a diffusion film, wherein the dual brightness enhancement film, the lower brightness enhancement film and the diffusion film are stacked in sequence, and the diffusion film abuts against a side surface of the light guide plate.
7. The backlight module according to claim 1, wherein the fixing frame comprises a rubber frame and a lower iron frame, and the rubber frame and the lower iron frame are buckled to form a limiting cavity.
8. The backlight module according to claim 7, wherein a foam double-sided adhesive is disposed on a side of the frame away from the limiting cavity.
9. The backlight module for improving light coupling efficiency of an LED of claim 7, wherein the side of the plastic frame facing the limiting cavity is provided with a limiting protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322102607.8U CN220438716U (en) | 2023-08-04 | 2023-08-04 | Backlight module capable of improving light coupling efficiency of LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322102607.8U CN220438716U (en) | 2023-08-04 | 2023-08-04 | Backlight module capable of improving light coupling efficiency of LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220438716U true CN220438716U (en) | 2024-02-02 |
Family
ID=89688346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322102607.8U Active CN220438716U (en) | 2023-08-04 | 2023-08-04 | Backlight module capable of improving light coupling efficiency of LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220438716U (en) |
-
2023
- 2023-08-04 CN CN202322102607.8U patent/CN220438716U/en active Active
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