CN210626832U - Backlight module and display device thereof - Google Patents
Backlight module and display device thereof Download PDFInfo
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- CN210626832U CN210626832U CN201921569643.2U CN201921569643U CN210626832U CN 210626832 U CN210626832 U CN 210626832U CN 201921569643 U CN201921569643 U CN 201921569643U CN 210626832 U CN210626832 U CN 210626832U
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Abstract
The utility model discloses a backlight module and a display device thereof, the backlight module comprises a backlight source and an optical assembly, the optical assembly comprises a diffusion plate and a quantum dot film which are arranged in sequence, an optical reflection part is arranged on the diffusion plate, and the optical reflection part is used for selectively reflecting various monochromatic lights; this application is through increasing optics reflecting region on the diffuser plate to carry out selective reflection to multiple monochromatic light, and then solved many subregion straight following formula backlight unit regional dimming because red and green light disturbs the colour drift problem that leads to.
Description
Technical Field
The utility model relates to a display device field, concretely relates to backlight module and display device thereof.
Background
With the development of backlight display technology, the market sees that many products are upgraded, and each competitor has a unique innovative element for the new generation of products. Among them, the core technology competition point of "high quality image display" becomes the target for the competitors in the contemporary display industry to pursue together.
The multi-partition direct type quantum dot backlight and the local dimming become the current mainstream high-quality display technology, however, the color deviation problem caused by the interference of red light and green light during the local backlight adjustment easily affects the image quality display effect, and is a key point difficult to overcome by the manufacturers at present.
Therefore, the prior art still needs to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at not enough among the prior art, provide a backlight unit and display device thereof, reach the purpose of avoiding the straight following formula backlight unit of many divisions because the color drift that regional dimming leads to.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a backlight unit, wherein, includes backlight and optical assembly, optical assembly is including the diffuser plate and the quantum dot membrane that set gradually, be provided with the optics reflection part on the diffuser plate, the optics reflection part is used for carrying out the selectivity reflection to multiple monochromatic light.
The backlight module comprises a light source, a diffuser plate and a backlight module, wherein the light source is arranged on the light source, the diffuser plate is arranged on the light source, and the optical reflection part comprises a reflection layer arranged on one surface of the diffuser plate facing the backlight module and/or one surface of the diffuser plate facing away from the backlight module.
In the backlight module, the reflective layer is a reflective film attached to the diffusion plate or a reflective coating coated on the diffusion plate.
The backlight module, wherein, the thickness of reflection stratum is less than 100 um.
The backlight module described above, wherein the optical reflection portion includes reflective particles embedded in the diffusion plate.
The backlight module further comprises a back plate, the backlight source is arranged on the back plate, and a reflector plate is arranged on one surface of the back plate, facing the backlight source.
The backlight module is characterized in that an optical brightness enhancement film is further arranged on one side, away from the backlight source, of the quantum dot film.
The backlight module is characterized in that the optical reflection part is used for reflecting at least two of the received red light, the received green light and the received blue light.
The backlight module is characterized in that the optical reflection part is used for reflecting the received red light and green light and transmitting the received blue light; or
The optical reflection part is used for reflecting the received red light and the received blue light and transmitting the received green light; or
The optical reflection part is used for reflecting the received blue light and green light and transmitting the received red light.
A display device comprises the backlight module.
To sum up, the utility model discloses following beneficial effect has:
the utility model discloses an increase optics reflection portion on the diffuser plate to carry out the selectivity reflection to multiple monochromatic light, and then avoid many divisions straight following formula backlight unit because the color drift that regional dimming leads to.
Drawings
Fig. 1 is a schematic structural diagram of the display device in this embodiment.
Fig. 2 is a schematic structural diagram of the backlight source in this embodiment.
FIG. 3 is a schematic view of an embodiment of a diffuser plate and a reflective layer in this example.
FIG. 4 is a schematic view of another embodiment of the diffuser plate and the reflective layer of this embodiment.
FIG. 5 is a schematic diagram of an embodiment of a diffuser plate and reflective particles in this example.
In the figure: 1. a back plate; 11. a reflective sheet; 2. a backlight source; 21. a light bar; 211. a PCB board; 212. a blue LED chip; 22. a lens; 3. an optical component; 31. a diffusion plate; 32. a quantum dot film; 33. an optical brightness enhancement film; 34. liquid crystal glass; 4. a reflective layer; 5. reflecting the particles.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
In the description of the present invention, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the interconnection of two elements or through the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example (b): as shown in fig. 1 and 2, the display device includes a backlight module and a display panel 34. Backlight unit includes backplate 1, backlight 2 and optical assembly 3, backlight 2 sets up on the backplate 1, optical assembly 3 is including diffuser plate 31 and the quantum dot membrane 32 that set gradually, be provided with the optics reflection part that is used for carrying out selective reflection to multiple monochromatic light on the diffuser plate 31, it is specific, optics reflection part is used for reflecting 2 one side of backlight are kicked into ruddiness or green glow, or reflect quantum dot membrane 32 receives the blue light that the light of backlight 2 arouses. An optical brightness enhancement film 33 is further disposed on a side of the quantum dot film 32 away from the backlight 2, and in this embodiment, the optical brightness enhancement film 33 may also be a brightness enhancement composite film.
The backlight source 2 is arranged on the back plate 1, and a reflecting sheet 11 is arranged on one surface of the back plate 1 facing the backlight source 2. Specifically, the backlight source 2 includes a light bar 21 and a lens 22, and the lens 22 is disposed at the front end of the light bar 21 and is configured to change a light path of light emitted by the light bar 21.
The light bar 21 comprises a PCB 211 and a blue LED chip 212, the blue LED chip 212 is arranged on the PCB 211, and the PCB 211 is fixedly arranged on the inner side of the back plate 1.
Therefore, the light source is a blue light source in the present application, and the present application is mainly directed to a direct type quantum dot backlight area dimming product, so that the optical assembly is redesigned, so that the optical assembly can have a function of one-way selective reflection for green light with a dominant wavelength range of 510nm to 550nm and red light with a dominant wavelength range of 610nm to 650nm, that is, according to the design requirements of the product, the simultaneous reflection of red light and green light is realized, or only the light of one waveband range of red light or green light is reflected.
Meanwhile, the optical component 3 also has a function of unidirectionally reflecting blue light, that is, the blue light transmitted in a direction away from the backlight source 2 is transmitted through the optical component. Specifically, after being excited, the quantum dot film 32 generates white light, that is, mixed light of multiple colors, including red light, green light and blue light, and the mixed light rays excited by the quantum dot film 32 can be transmitted in all directions, wherein the blue light transmitted toward the 2 directions of the backlight source can be reflected and transmitted away from the 2 directions of the backlight source when encountering the optical reflection portion, so that the loss of the blue light is reduced, the blue light can be recycled in time, and better light efficiency is realized.
The combination of the backlight 2 and the quantum dot film 32 includes that the blue LED chip 212 excites the red and green quantum dot materials, or the blue LED chip 212 and the red phosphor excite the green quantum dot materials, or the blue LED chip 212 and the green phosphor excite the red quantum dot materials.
The red light, the green light and the blue light generated according to the above design scheme are transmitted towards the backlight 2 and away from the backlight 2, wherein when the red light, the green light and the blue light transmitted towards the backlight 2 meet the optical reflection part with the selective reflection function design, the three colors of light are selectively reflected according to the requirements of actual products. Therefore, when regional dimming is realized, the whole full white field display formed by combining the local small region window and the small windows cannot be interfered by red light and green light, namely, single-region independent light control is realized, the problem of color deviation caused by interference of the red light and the green light during the regional backlight modulation is solved, and the image quality display effect is improved.
As shown in fig. 3 to 5, the optical reflection portion is a reflection layer 4 disposed on a surface of the diffusion plate 31 facing the backlight 2 and/or a surface facing away from the backlight 2. The reflective layer 4 is a reflective film attached to the diffusion plate 31 or a reflective coating coated on the diffusion plate 31. The thickness of the reflecting layer 4 is less than 100 um.
In the present embodiment, the optical reflection portion specifically includes the reflection layer 4 or the reflection particles 5, wherein the optical reflection portion having selective reflection for green light having a dominant wavelength range of 510nm to 550nm, red light having a dominant wavelength range of 610nm to 650nm, and blue light includes the following two implementations, specifically, as follows.
In the first embodiment, the optical reflection portion includes a reflection film provided on a light-facing surface of the diffusion plate 31, or the optical reflection portion includes a reflection film provided on a light-exiting surface of the diffusion plate 31. The reflective film is attached to the diffusion plate 31 by means of film attachment. Specifically, the reflective film is a multilayer design film having a selective reflection function for green light, red light, and blue light, and is attached to the upper surface or the lower surface of the diffusion plate 31.
The reflecting film comprises a plurality of optical film layers with different light reflectivity, and selective reflection of light with different wave bands is realized through reflection difference of each optical film layer structure to the light. The reflective film is formed in a co-extrusion mode.
In a second embodiment, the reflective layer 4 is a reflective coating applied to the diffuser plate 31. That is, a reflective coating layer having a selective reflection function for green, red, and blue light is coated on the upper or lower surface of the diffusion plate 31.
The reflecting material of the reflecting coating is a powdery high polymer synthetic material, the powdery high polymer material is mixed with a transparent resin material, a curing agent and a diluent according to a preset proportion, the mixture is uniformly stirred to form a reflecting coating, and the reflecting coating is printed on the diffusion plate to form the reflecting coating.
In a third embodiment, the optical reflection part comprises reflective particles 5 embedded within the diffuser plate 31.
Wherein, the specific reflection scheme of the optical reflection part comprises: the optical reflection part reflects blue light, green light and red light; or the optical reflection part reflects green light and red light and transmits blue light; or the optical reflection part reflects the blue light and the red light and transmits the green light; or the optical reflection part reflects the blue light and the green light and transmits the red light.
Specifically choose which kind of reflection and transmission mode for use, set up according to actual need, consequently this application can also be according to user's actual need adjustment backlight unit's demonstration tone.
To sum up, this application is through increasing optics reflecting part on the diffuser plate to carry out selective reflection to multiple monochromatic light, and then avoid many subregion straight following formula backlight unit regional when adjusting luminance because the colour drift that red and green light disturbed and leads to.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A backlight module is characterized in that: the backlight module comprises a backlight source and an optical assembly, wherein the optical assembly comprises a diffusion plate and a quantum dot film which are sequentially arranged, an optical reflection part is arranged on the diffusion plate, and the optical reflection part is used for selectively reflecting various monochromatic lights.
2. A backlight module according to claim 1, wherein: the optical reflection part comprises a reflection layer arranged on one surface of the diffusion plate facing the backlight source and/or one surface of the diffusion plate facing away from the backlight source.
3. A backlight module according to claim 2, wherein: the reflecting layer is a reflecting film attached to the diffusion plate or a reflecting coating coated on the diffusion plate.
4. A backlight module according to claim 3, wherein: the thickness of the reflecting layer is less than 100 um.
5. The backlight module as set forth in claim 1, wherein: the optical reflection portion includes reflective particles embedded within the diffuser plate.
6. A backlight module according to claim 1, wherein: the backlight module further comprises a back plate, the backlight source is arranged on the back plate, and a reflecting sheet is arranged on one surface, facing the backlight source, of the back plate.
7. A backlight module according to claim 1, wherein: and an optical brightness enhancement film is further arranged on one side, away from the backlight source, of the quantum dot film.
8. A backlight module according to claim 1, wherein: the optical reflection part is used for reflecting at least two of the received red light, the received green light and the received blue light.
9. A backlight module according to claim 8, wherein: the optical reflection part is used for reflecting the received red light and green light and transmitting the received blue light; or
The optical reflection part is used for reflecting the received red light and the received blue light and transmitting the received green light; or
The optical reflection part is used for reflecting the received blue light and green light and transmitting the received red light.
10. A display device, characterized in that: comprising a backlight module as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921569643.2U CN210626832U (en) | 2019-09-20 | 2019-09-20 | Backlight module and display device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921569643.2U CN210626832U (en) | 2019-09-20 | 2019-09-20 | Backlight module and display device thereof |
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| CN210626832U true CN210626832U (en) | 2020-05-26 |
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| CN201921569643.2U Active CN210626832U (en) | 2019-09-20 | 2019-09-20 | Backlight module and display device thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684633A (en) * | 2020-12-28 | 2021-04-20 | 深圳市康冠商用科技有限公司 | Composite diffusion plate and display device |
| CN113936541A (en) * | 2020-06-29 | 2022-01-14 | 京东方科技集团股份有限公司 | Direct type backlight module and display device |
| CN114675451A (en) * | 2022-04-24 | 2022-06-28 | 京东方科技集团股份有限公司 | Optical module and splicing display device |
| CN115685625A (en) * | 2022-11-30 | 2023-02-03 | 武汉天马微电子有限公司 | Backlight module and display device |
-
2019
- 2019-09-20 CN CN201921569643.2U patent/CN210626832U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113936541A (en) * | 2020-06-29 | 2022-01-14 | 京东方科技集团股份有限公司 | Direct type backlight module and display device |
| CN113936541B (en) * | 2020-06-29 | 2023-02-21 | 京东方科技集团股份有限公司 | Direct type backlight module and display device |
| US11796155B2 (en) | 2020-06-29 | 2023-10-24 | Beijing Boe Optoelectronics Technology Co., Ltd. | Backlight assembly and display device |
| CN112684633A (en) * | 2020-12-28 | 2021-04-20 | 深圳市康冠商用科技有限公司 | Composite diffusion plate and display device |
| CN114675451A (en) * | 2022-04-24 | 2022-06-28 | 京东方科技集团股份有限公司 | Optical module and splicing display device |
| CN114675451B (en) * | 2022-04-24 | 2023-10-20 | 京东方科技集团股份有限公司 | Optical module and spliced display device |
| CN115685625A (en) * | 2022-11-30 | 2023-02-03 | 武汉天马微电子有限公司 | Backlight module and display device |
| CN115685625B (en) * | 2022-11-30 | 2024-05-07 | 武汉天马微电子有限公司 | Backlight module and display device |
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