CN218181271U - Backlight structure and display device - Google Patents
Backlight structure and display device Download PDFInfo
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- CN218181271U CN218181271U CN202222033045.1U CN202222033045U CN218181271U CN 218181271 U CN218181271 U CN 218181271U CN 202222033045 U CN202222033045 U CN 202222033045U CN 218181271 U CN218181271 U CN 218181271U
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Abstract
The application provides a structure and display device are shaded, and this structure is shaded includes: a substrate having first and second opposing surfaces; the light-emitting chip is directly or indirectly arranged on the first surface and is provided with a light-emitting surface back to the first surface; a first reflective layer disposed on the first surface; the second reflecting layer is arranged at the side of the light-emitting surface of the light-emitting chip and is spaced from the light-emitting surface of the light-emitting chip, and a plurality of light-emitting holes for emitting light rays are distributed on the second reflecting layer; wherein, a reflecting space is formed between two adjacent reflecting layers. In the backlight structure, light rays generated by the light emitting chip irradiate the second reflecting layer firstly, and are reflected by the second reflecting layer and the first reflecting layer in the reflecting space until the light rays are emitted out through the light emitting hole.
Description
Technical Field
The utility model relates to a display technology especially relates to a structure and display device are shaded.
Background
With the improvement of various display performance requirements of people, the size of the Light Emitting Diode is smaller and smaller, and the application of sub-millimeter Light Emitting diodes (Mini-LED) and Micro Light Emitting diodes (Micro-LED) is wider and wider, but when the existing Mini-LED and Micro-LED are used as a direct display or backlight Light Emitting module, light emitted by the LED is directly emitted through an optical diaphragm, and the problems of poor Light Emitting uniformity, yellow chromaticity and the like exist.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the main object of the present application is to improve the light-emitting uniformity of the backlight structure.
To this end, the present application provides a backlight structure comprising:
a substrate having first and second opposing surfaces;
the light emitting chips are directly or indirectly arranged on the first surface and are provided with light emitting surfaces back to the first surface;
a first reflective layer disposed on the first surface; and
the second reflecting layer is arranged on the side where the light-emitting surface of the light-emitting chip is located and is spaced from the light-emitting surface of the light-emitting chip, and a plurality of light-emitting holes for emitting light rays are distributed in the second reflecting layer;
wherein, a reflecting space is formed between two adjacent reflecting layers.
In the backlight structure, light rays generated by the light emitting chip irradiate the second reflecting layer firstly, and are reflected by the second reflecting layer and the first reflecting layer in the reflecting space until the light rays are emitted out through the light emitting hole.
Optionally, the light emitting chips are directly arranged on the first surface, and a hollow portion for avoiding the light emitting chips is disposed on the first reflective layer.
Optionally, the light emitting chip is disposed on the first reflective layer.
Optionally, the number of the second reflective layers is at least two, a first reflective space is formed between the first reflective layer and the adjacent second reflective layer, and a second reflective space is formed between the adjacent second reflective layers.
Optionally, the second reflective layer is a layer, and the reflective space is formed between the second reflective layer and the first reflective layer.
Optionally, in the light exit direction, the cross-sectional size of the light exit hole gradually increases, so that the light exit hole has an inclined hole wall. The structure is beneficial to improving and increasing the light intensity of the front view angle.
Optionally, the light exit holes are arranged in the second reflective layer, and the hole wall inclinations of the light exit holes are the same.
Optionally, the light emitting hole array is disposed on the second reflective layer, a single light emitting chip corresponds to multiple light emitting holes, the center of each light emitting hole is used as an origin, and the inclination of the hole wall of each light emitting hole decreases with the increase of the distance between the light emitting hole and the origin. The structure is more beneficial to improving and increasing the light intensity of the front view angle.
Optionally, the backlight structure further includes an optical film assembly, the optical film assembly includes multiple layers of optical films stacked in sequence, and the light emitting chip, the first reflective layer and the second reflective layer are all located between the substrate and the optical film assembly.
Correspondingly, the utility model also provides a display device, include:
a liquid crystal display panel; and
the liquid crystal display panel is arranged on the light emitting side of the backlight structure, and the backlight structure is any one of the backlight structures.
In the display device, the light generated by the light emitting chip irradiates the second reflecting layer firstly, and is reflected by the second reflecting layer and the first reflecting layer in the reflecting space until the light is emitted out through the light outlet.
Drawings
Fig. 1 is a schematic structural diagram of an exemplary backlight structure of the present invention;
fig. 2 is a schematic diagram of another exemplary structure of the backlight structure of the present invention;
fig. 3 is a schematic structural diagram of another exemplary backlight structure of the present invention;
FIG. 4 is a schematic diagram of an exemplary structure of a light exit hole in the second reflective layer;
FIG. 5 is a schematic diagram of another exemplary structure of a light exit hole in a second reflective layer;
fig. 6 is a schematic view of another exemplary structure of a light exit hole in the second reflective layer.
Description of reference numerals:
100-substrate, 101-first surface, 102-second surface;
200-light emitting chip, 201-light emitting surface;
300-a first reflective layer;
400-second reflecting layer, 410-light exit hole;
500-optical film combination, 510-diffusion sheet, 520-RG reflection sheet, 530-light conversion film, 540-light splitting film and 550-increment film;
f-reflective space, F1-first reflective space, F2-second reflective space.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In the existing backlight structure, light emitted by the light emitting chip is directly emitted out through the optical film, and the problem of poor light emitting uniformity exists.
Based on this, the present application is expected to provide a solution to the above technical problem. The details of which will be set forth in the examples that follow.
Referring to fig. 1 to 3 in combination, the present application provides a backlight structure, including: a substrate 100, a light emitting chip 200, a first reflective layer 300, and at least one second reflective layer 400; the substrate 100 has opposing first and second surfaces 101 and 102; the light emitting chips 200 are directly or indirectly arranged on the first surface 101, and the light emitting chips 200 have light emitting surfaces 201 back to the first surface 101; a first reflective layer 300 is disposed on the first surface 101; the second reflective layer 400 is disposed at the side of the light emitting surface 201 of the light emitting chip 200, the second reflective layer 400 is spaced from the light emitting surface 201 of the light emitting chip 200, and a plurality of light emitting holes 410 for emitting light are distributed on the second reflective layer 400; wherein, a reflecting space is formed between two adjacent reflecting layers.
In this backlight structure, the light generated by the light emitting chip 200 first irradiates the second reflective layer 400, and is reflected by the second reflective layer 400 and the first reflective layer 300 in the reflective space until the light is emitted through the light emitting hole 410.
The corresponding display device comprises a liquid crystal display panel (not shown) and a backlight structure, wherein the liquid crystal display panel is arranged on the light-emitting side of the backlight structure, and the backlight structure is the backlight structure in any one of the above or below embodiments. It should be noted that the backlight structures of the above and following embodiments may be the backlight structure in the direct display mode, or may be the whole module including the backlight structure and the panel in the backlight mode.
The light emitting chip 200 of the above and following embodiments may be a light emitting diode of a normal size, a Mini-LED, a Micro-LED, or any other size. The substrate 100 of the above and below embodiments is a carrier of the entire backlight structure, and plays a role of supporting the light emitting chips and the reflective layers; the substrate 100 in this embodiment optionally includes, but is not limited to, a TFT (Thin Film Transistor) substrate, and after the light emitting device 200 is disposed on the substrate 100, the light emitting device needs to be connected to a corresponding driving circuit, so that the light emitting device is controlled to be turned on and off by the driving circuit, and the TFT substrate is provided with the corresponding driving circuit.
In an actual implementation process, the first reflective layer 300 may be formed on the substrate 100 by coating, or the first reflective layer 300 may be formed by adhering a reflective plate on the substrate 100. In addition, in the actual implementation process, the light exit hole 410 may be filled with a transparent material, or may not be filled with a transparent material.
In some embodiments, referring to fig. 1 and 2, the light emitting chips 200 are directly arranged on the first surface 101, and the first reflective layer 300 is provided with a hollow portion for avoiding the light emitting chips 200. In other embodiments, referring to fig. 3, the light emitting chip 200 is disposed on the first reflective layer 300.
In some embodiments, referring to fig. 2, the number of the second reflective layers 400 is at least two, and the first reflective layer 300 and the adjacent second reflective layer 400 form a first reflective space F1 therebetween, and the adjacent second reflective layers 400 form a second reflective space F2 therebetween. For example, in fig. 2, the second reflective layer 400 has two layers, and the light holes 410 of the two reflective layers are staggered.
In other embodiments, referring to fig. 1 and 3, the second reflective layer 400 is a single layer, and the reflective space F is formed between the second reflective layer 400 and the first reflective layer 300.
In some embodiments, referring to fig. 4 and 6, the light exit holes 410 have gradually larger cross-sectional sizes along the light exit direction, so that the light exit holes 410 have inclined hole walls, which is beneficial for increasing the front-view light intensity. For example, the light exit hole 410 may be a conical hole; for another example, the light emergent controller 410 may be a polygonal taper hole with a polygonal cross section.
For easy understanding, referring to fig. 4 and 5, when the light exit hole 410 is a cylindrical hole, the exit angle of the light reflected by the cylindrical hole is closer to the positive viewing angle, i.e., closer to the direction perpendicular to the substrate 100.
It should be noted that, in practical implementation, it is not excluded that the cross-sectional size of the light exit hole 410 is kept constant along the light exit direction.
In some embodiments, referring to fig. 1 to 3, the light emitting holes 410 are arranged in an array on the second reflective layer 400, and the hole wall of each light emitting hole 410 has the same inclination.
In other embodiments, referring to fig. 6, the light emitting holes 410 are arranged on the second reflective layer 400 in an array, a single light emitting chip 200 corresponds to a plurality of light emitting holes 410, the center of the light emitting hole 410 is used as an origin, and the inclination of the hole wall of each light emitting hole 410 decreases as the distance between the light emitting hole 410 and the origin increases, which is more beneficial to increasing the light intensity at the front viewing angle.
In some embodiments, referring to fig. 1 to 3, the backlight structure further includes an optical film assembly 500 including a plurality of optical films stacked in sequence, and the light emitting chip 200, the first reflective layer 300, and the second reflective layer 400 are located between the substrate 100 and the optical film assembly 500.
In some embodiments, referring to fig. 1 to 3, the optical film combination includes a diffusion sheet 510, an RG reflector sheet 520, a light conversion film 530, a splitting film 540, and an incremental film 550 in this order, the diffusion sheet 510 is disposed on the light emitting side of the second reflector sheet, the RG reflector sheet 520 is disposed on the diffusion sheet 510, the light conversion film 530 is disposed on the RG reflector sheet 520, the splitting film 540 is disposed on the light conversion film 530, and the incremental film 550 is disposed on the splitting film 540. The diffusion sheet 510 is used for diffusing light emitted by the light emitting chip 200 to homogenize the light, when the light emitting chip 200 is a blue light chip, the light conversion film is used for converting the blue light into red light and green light, the RG reflector 520 is used for reflecting the red light and the green light generated by the light conversion film, so that the red light and the green light emitted by the light conversion film to the RG reflector 520 are reflected by the RG reflector 520 to be reused, the light splitting film 540 is used for dispersing light beams to homogenize the light, and the brightness enhancement film is used for gathering large-angle light, so that the light in the vertical direction is enhanced. In an actual implementation process, the light splitting film 540 may be a single layer or a plurality of layers, and the light conversion film 530 may be a quantum dot film or a grating film layer.
In some embodiments, the first reflective layer 300 is a white light reflective layer. White light reflection stratum i.e. RGB reflection stratum, white light reflection stratum can reflect red green blue three-color light, and current RG reflector plate can only reflect red green light, makes the blue light see through, consequently, if first reflection stratum 300 can increase the utilization to the blue light for white light reflection sheet, white light reflection sheet can effectively improve the white point and increase the luminance of being shaded thereby reach under the same luminance demand, more is favorable to sparingly the consumption.
In practical implementation, the second reflective layer 400 may also be a white light reflective layer, which can reflect blue light, and is beneficial to increasing the light mixing path of blue light, so that the light emission is more uniform.
In some embodiments, the first reflective layer 300 has light scattering particles (not shown) disposed thereon; in other embodiments, light scattering particles (not shown) are disposed on the second reflective layer 400; in still other embodiments, light scattering particles (not shown) are disposed on both the first reflective layer 300 and the second reflective layer 400. Whether light scattering particles are provided on the first reflective layer 300 and/or the second reflective layer 400, it is possible to provide more uniform light emission.
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 structure, comprising:
a substrate having opposing first and second surfaces;
the light emitting chips are directly or indirectly arranged on the first surface and are provided with light emitting surfaces back to the first surface;
a first reflective layer disposed on the first surface; and
the second reflecting layer is arranged on the side where the light-emitting surface of the light-emitting chip is located and is spaced from the light-emitting surface of the light-emitting chip, and a plurality of light-emitting holes for emitting light rays are distributed on the second reflecting layer;
wherein, a reflecting space is formed between two adjacent reflecting layers.
2. The backlight structures defined in claim 1 wherein: the light emitting chips are directly arranged on the first surface, and the first reflecting layer is provided with a hollow part for avoiding the light emitting chips.
3. The backlight structures defined in claim 1 wherein: the light emitting chip is arranged on the first reflecting layer.
4. The backlight structure of claim 1, wherein: the number of the second reflecting layers is at least two, a first reflecting space is formed between the first reflecting layer and the adjacent second reflecting layer, and a second reflecting space is formed between the adjacent second reflecting layers.
5. The backlight structure of claim 1, wherein: the second reflecting layer is a layer, and the reflecting space is formed between the second reflecting layer and the first reflecting layer.
6. The backlight structures defined in claim 1 wherein: along the light-emitting direction, the cross-sectional dimension of the light-emitting hole gradually becomes bigger, so that the light-emitting hole has an inclined hole wall.
7. The backlight structure of claim 6, wherein: the light emitting holes are arranged on the second reflecting layer in an array mode, and the hole wall gradient of each light emitting hole is the same.
8. The backlight structures defined in claim 6 wherein: the light emitting chip is arranged on the second reflecting layer, the single light emitting chip corresponds to the plurality of light emitting holes, the center of each light emitting hole is taken as an original point, and the hole wall inclination of each corresponding light emitting hole is reduced along with the increase of the distance between the light emitting hole and the original point.
9. The backlight structure of claim 1, wherein: the backlight structure further comprises an optical membrane combination, the optical membrane combination comprises a plurality of layers of optical membranes which are sequentially stacked, and the light-emitting chip, the first reflecting layer and the second reflecting layer are located between the substrate and the optical membrane combination.
10. A display device, comprising:
a liquid crystal display panel; and
a backlight structure, wherein the liquid crystal display panel is arranged at the light-emitting side of the backlight structure, and the backlight structure is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222033045.1U CN218181271U (en) | 2022-08-03 | 2022-08-03 | Backlight structure and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222033045.1U CN218181271U (en) | 2022-08-03 | 2022-08-03 | Backlight structure and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218181271U true CN218181271U (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222033045.1U Active CN218181271U (en) | 2022-08-03 | 2022-08-03 | Backlight structure and display device |
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| Country | Link |
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| CN (1) | CN218181271U (en) |
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- 2022-08-03 CN CN202222033045.1U patent/CN218181271U/en active Active
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