CN217506831U - Mini-LED module and display screen - Google Patents
Mini-LED module and display screen Download PDFInfo
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- CN217506831U CN217506831U CN202221406621.6U CN202221406621U CN217506831U CN 217506831 U CN217506831 U CN 217506831U CN 202221406621 U CN202221406621 U CN 202221406621U CN 217506831 U CN217506831 U CN 217506831U
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Abstract
The utility model discloses a mini-LED module and a display screen, wherein the mini-LED module comprises N mini light-emitting diode chips arranged on a circuit board, and the mini light-emitting diode chips comprise red light-emitting diodes, green light-emitting diodes and blue light-emitting diodes with different light-emitting colors, and the N mini light-emitting diode chips are used for forming M pixel points; in each pixel point, an optical reflection film is arranged on the light emergent surface of at least one of the red light emitting diode, the green light emitting diode and the blue light emitting diode. The optical reflection film is arranged on the light emitting surface of at least one of the red light emitting diode, the green light emitting diode and the blue light emitting diode in each pixel point, so that the proportion of the front luminous flux and the side luminous flux of the light emitting diodes can be controlled, the proportion of the front luminous flux and the side luminous flux of the light emitting diodes in each pixel point is the same, and the problems of insufficient light mixing and color cast of the mini light emitting diode applied to the rear side of the display screen can be solved.
Description
Technical Field
The utility model relates to a display device technical field, concretely relates to mini-LED module and display screen.
Background
With the vigorous development of the LED chip industry, LED display screens are also widely applied to the fields of outdoor display, indoor display, security system, Ar, VR, etc. the preparation technology of LED display screens is always updated and iterated, and the contrast, definition, and image quality of LED display screens are better and better, but when people watch the LED display screens at the side, the problems of poor image quality, weakened contrast, etc. occur, which are always the pain points of the industry and need to be solved urgently;
the process of the utility model discloses the research discovery, current mini ruddiness emitting diode openly is 1 with side luminous flux proportion: 0.5, the luminous flux ratio of the front surface to the side surface of the mini blue light-emitting diode is 1:0.75, the luminous flux ratio of the front surface to the side surface of the mini green light emitting diode is 1:0.75, it can be seen that the ratio of the luminous flux of the front side of the mini red light emitting diode to the luminous flux of the side is different from that of the mini blue light and mini green light, so that after the mini red light emitting diode is applied to a display screen, when the front side is white balanced, the problems of insufficient light mixing, red side deviation and blue side deviation can occur on the side surface.
SUMMERY OF THE UTILITY MODEL
The utility model aims to prior art's is not enough, the utility model aims at providing a mini-LED module and display screen aims at solving among the prior art mini emitting diode and is applied to the problem that the display screen trailing flank mixed light is not enough and the color cast.
One aspect of the present invention is to provide a mini-LED module, which includes N mini LED chips disposed on a circuit board, wherein each mini LED chip includes a red LED, a green LED and a blue LED with different colors, and the N mini LED chips are used to form M pixels;
in each pixel point, an optical reflection film is arranged on a light-emitting surface of at least one of the red light-emitting diode, the green light-emitting diode and the blue light-emitting diode.
According to one aspect of the foregoing technical solution, a first optical reflection film is disposed on a side of the red light emitting diode away from the bonding layer, and a reflectance of the first optical reflection film is between 70% and 90% within a range of 500nm to 700 nm.
According to one aspect of the above technical solution, the ratio of front light-emitting to side light-emitting of the red light-emitting diode and the green light-emitting diode and the ratio of front light-emitting to side light-emitting of the blue light-emitting diode are equal.
According to one aspect of the above technical solution, the ratio of front light emission to side light emission of the red light emitting diode to the green light emitting diode and the blue light emitting diode is 1: 0.75.
According to one aspect of the above technical solution, a second optical reflection film is disposed on a side of the red light emitting diode far from the bonding layer on the substrate, a third optical reflection film is disposed on a side of the green light emitting diode and a side of the blue light emitting diode far from the epitaxial layer on the substrate, respectively, a reflectance of the second optical reflection film is between 70% and 98% within 500nm to 700nm, and a reflectance of the third optical reflection film is between 50% and 95% within 400nm to 600 nm.
According to one aspect of the above technical solution, the ratio of front light emission to side light emission of the red light emitting diode to the green light emitting diode and the blue light emitting diode is equal.
According to one aspect of the above technical solution, the ratio of front light emission to side light emission of the red light emitting diode to the green light emitting diode and the blue light emitting diode is 1:0.5-1: 5.
According to an aspect of the above technical solution, the first optical reflection film and the second optical reflection filmThe two optical reflection films and the third optical reflection film are both at least two pairs of SiO 2 With Ti 3 O 5 Is made of the material pair of (1).
According to an aspect of the above technical solution, the first optical reflective film is made of SiO 2 With Ti 3 O 5 The optical thickness of the material is 125nm-175nm respectively, and SiO in the second optical reflection film 2 With Ti 3 O 5 The optical thickness of the material is 125nm-175nm respectively, and SiO in the third optical reflection film 2 With Ti 3 O 5 The optical thickness of the material is 100nm-150nm respectively.
Another aspect of the present invention is to provide a display screen, including the mini-LED module described in the above technical solution.
Compared with the prior art, adopt the utility model discloses shown mini-LED module and display screen, beneficial effect lies in:
the optical reflection film is arranged on the light-emitting surface of at least one of the red light-emitting diode, the green light-emitting diode and the blue light-emitting diode in each pixel point, so that the proportion of the front luminous flux and the side luminous flux of the light-emitting diodes can be controlled, the proportion of the front luminous flux and the side luminous flux of the light-emitting diodes in each pixel point is the same, and the problems of insufficient light mixing and color cast of the rear side surface of the display screen after the mini light-emitting diode is applied are solved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a red light-emitting diode in a mini-LED module according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a green light-emitting diode or a blue light-emitting diode in a mini-LED module according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a red light-emitting diode in a mini-LED module according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a green light-emitting diode or a blue light-emitting diode in a mini-LED module according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display screen according to a third embodiment of the present invention;
description of the figures the symbols:
the display panel 100, the red light emitting diode 121, the green light emitting diode 122, the blue light emitting diode 123, the substrate 21, the bonding layer 22, the epitaxial layer 23, the N-type electrode layer 241, the P-type electrode layer 242, the insulating reflective layer 25, the pad layer 26, the current spreading layer 27, the first optical reflective film 281, the second optical reflective film 282, and the third optical reflective film 283.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention 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.
The utility model provides a mini-LED module, including N mini emitting diode chips of locating on the circuit board, in order to make this mini-LED module can send the light of different colours, mini emitting diode includes the ruddiness emitting diode 121, green glow emitting diode 122 and the blue light emitting diode 123 of different luminescent colours, is used for sending ruddiness, green glow and blue light respectively, can send the light of other colours when arbitrary two or three combinations are luminous, wherein, N mini emitting diode chips are used for constituting M pixel, and N is 3M;
for example, when the N mini led chips are 38700, 38700 mini led chips are used to form 12900 pixel points, and each pixel point includes 1 red led 121, 1 green led 122, and 1 blue led 123 respectively; of course, the number of pixels formed by the mini LED chip in the mini-LED module is extremely large, which is not limited to the examples of the present invention.
In order to make the ratio of the front light flux to the side light flux of the red light emitting diode 121 as close as possible or equal to the ratio of the front light flux to the side light flux of the green light emitting diode 122 and the blue light emitting diode 123, in each pixel point, an optical reflection film is arranged on the light exit surface of at least one of the red light emitting diode 121, the green light emitting diode 122 and the blue light emitting diode 123. The optical reflection film is used for reflecting light rays of the light outgoing surfaces in the red light emitting diode 121 and/or the green light emitting diode 122 and/or the blue light emitting diode 123, so that the proportion of the front light outgoing surface and the side light outgoing surface of the red light emitting diode 121, the green light emitting diode 122 or the blue light emitting diode 123 can be changed, the light mixing effect of each pixel point in the mini-LED module is improved, and the integral display effect of the mini-LED module is improved. The optical reflection film is composed of at least two pairs of SiO 2 With Ti 3 O 5 Is made of the material pair of (1).
For example, when only the red LED 121 and the green LED 122 in a certain pixel are in an operating state, and the blue LED 123 is in a sleep state, due to the adoption of the mini-LED module shown in this embodiment, the ratio of the front light emission to the side light emission of the red LED 121 and the green LED 122 is equal, and when the luminance of the red LED 121 and the luminance of the green LED 122 are equal, the pixel will display yellow as a whole, and the situation of insufficient light mixing in the pixel will not occur.
Example one
Referring to fig. 1-2, a first embodiment of the present invention provides a mini-LED module, in which an optical reflection film for reflecting/refracting light is disposed only on a light emitting surface of a red light emitting diode 121, and for convenience of description, the optical reflection film disposed on the light emitting surface of the red light emitting diode 121 is a first optical reflection film 281 in this embodiment.
Specifically, the red light emitting diode 121 is an improved light emitting chip, and according to the direction shown in the drawing, the red light emitting diode sequentially includes, from bottom to top, a pad layer 26, an insulating reflective layer 25, an N-type electrode layer 241, a P-type electrode layer 242, an epitaxial layer 23, a bonding layer 22, and a substrate 21, and a light emitting surface is located on a side of the substrate 21 away from the bonding layer 22. A first optical reflection film 281 is disposed on a light emitting surface of the red led 121, and the first optical reflection film 281 is disposed on a side of the substrate 21 of the red led 121 away from the bonding layer 22.
Moreover, the reflectivity of the first optical reflective film 281 is between 70% and 90% within the thickness range of 500nm to 700nm, and the arrangement of the first optical reflective film 281 not only can effectively reflect most of the light, but also can ensure that a small part of the light will penetrate through the first optical reflective film 281 to be emitted, thereby ensuring the reflection and transmission effects of the first optical reflective film 281.
By arranging the first optical reflection film 281 on the light emitting surface of the red light emitting diode 121, the ratio of the front light emitting to the side light emitting of the red light emitting diode 121 is 1:0.75, so that the ratio of the front light emitting to the side light emitting of the red light emitting diode 121 is equal to the ratio of the front light emitting to the side light emitting of the green light emitting diode 122 and the blue light emitting diode 123.
Certainly, in order to make the ratio of the front light-emitting to the side light-emitting of the green light-emitting diode 122 and the blue light-emitting diode 123 be 1:0.75, in this embodiment, it is not necessary to improve the structure of the green light-emitting diode 122 and the blue light-emitting diode 123, and the structure includes the pad layer 26, the insulating reflective layer 25, the N-type electrode layer 241, the P-type electrode layer 242, the current spreading layer 27, the epitaxial layer 23, and the substrate 21.
In the preferred embodiment of the present invention, the first optical reflective film 281 is formed of 8 pairs of SiO 2 With Ti 3 O 5 Is made of a material pair ofThe reflectance of the optical reflective film 281 has an average value of 85% in the range of 500nm to 700 nm. In addition, SiO in the first optical reflection film 281 shown in the present embodiment 2 With Ti 3 O 5 The optical thickness of the material is 125nm-175nm respectively.
Compared with the prior art, the mini-LED module shown in the embodiment has the advantages that:
by disposing the first optical reflective film 281 on the light emitting surface of the red light emitting diode 121, that is, on the side of the substrate 21 of the red light emitting diode 121 away from the bonding layer 22, the first optical reflective film 281 can reflect most of the light rays, and at the same time, can ensure that a small portion of the light rays can transmit through the first optical reflective film 281; the ratio of the front light emission to the side light emission of the red light emitting diode 121 is 1:0.75, the proportion of the front light-emitting to the side light-emitting of the green light-emitting diode 122 and the blue light-emitting diode 123 in the conventional structure is equal; the light mixing effect that any two or three light emitting diodes in the pixel point emit light simultaneously is ensured; when the mini-LED module is applied to the display screen 100, even if the front white balance of the display screen 100 occurs, the situation that one side of the display screen 100 is red and the other side of the display screen is blue due to insufficient light mixing can not occur.
Example two
Referring to fig. 3-4, a second embodiment of the present invention provides a mini-LED module, in the mini-LED module shown in this embodiment, a second optical reflective film 282 for reflecting/refracting light is disposed on the light emitting surface of the red light emitting diode 121, and a third optical reflective film 283 for reflecting/refracting light is disposed on the light emitting surfaces of the green light emitting diode 122 and the blue light emitting diode 123, respectively.
Specifically, the red light emitting diode 121 is an improved light emitting chip, and sequentially includes, from bottom to top, a pad layer 26, an insulating reflective layer 25, an N-type electrode layer 241, a P-type electrode layer 242, an epitaxial layer 23, a bonding layer 22, and a substrate 21 according to a direction shown in the drawing, wherein a light emitting surface is on a side of the substrate 21 away from the bonding layer 22. A second optical reflection film 282 is disposed on the light-emitting surface of the red led 121, and the second optical reflection film 282 is disposed on a side of the substrate 21 of the red led 121 away from the bonding layer 22.
Moreover, the reflectivity of the second optical reflection film 282 is between 70% and 98% within the thickness range of 500nm to 700nm, and the second optical reflection film 282 is arranged to not only effectively reflect most of the light, but also ensure that a small portion of the light will penetrate through the second optical reflection film 282 to be emitted, thereby ensuring the reflection and transmission effects of the second optical reflection film 282.
In addition, the green light emitting diode 122 and the blue light emitting diode 123 are respectively improved light emitting chips, taking the green light emitting diode 122 as an example, the green light emitting diode includes, in the direction shown in the drawing, a pad layer 26, an insulating reflective layer 25, a P-type electrode layer 242, an N-type electrode layer 241, a current spreading layer 27, an epitaxial layer 23 and a substrate 21 from bottom to top in sequence, and a light emitting surface is arranged on one side of the substrate 21 away from the epitaxial layer 23; third optical reflection films 283 are respectively disposed on the light emitting surfaces of the green light emitting diode 122 and the blue light emitting diode 123, and the third optical reflection films 283 are respectively disposed on the sides of the substrate 21 of the green light emitting diode 122 and the blue light emitting diode 123 far away from the epitaxial layer 23.
Moreover, the reflectivity of the third optical reflection film 283 arranged on the green light emitting diode 122 is between 50% and 95% within the thickness range of 400nm to 600nm, and the third optical reflection film 283 is arranged on the light emitting surface of the green light emitting diode 122, so that most of light can be effectively reflected, and meanwhile, a small part of light can be ensured to be emitted through the third optical reflection film 283, thereby ensuring the reflection and transmission effects of the third optical reflection film 283. Similarly, the reflectivity of the third optical reflection film 283 disposed on the blue light led 123 is within a range of thickness of 400nm to 600nm and also within a range of 50% to 95%, and by disposing the third optical reflection film 283 on the light emitting surface of the blue light led 123, not only most of the light can be effectively reflected, but also a small portion of the light can be emitted through the third optical reflection film 283, thereby ensuring the reflection and transmission effects of the third optical reflection film 283.
In the present embodiment, the ratio of the front light-emitting and the side light-emitting of the red light-emitting diode 121, the green light-emitting diode 122 and the blue light-emitting diode 123 is equal by disposing the second optical reflection film 282 on the light-emitting surface of the red light-emitting diode 121, and disposing the third optical reflection film 283 on the light-emitting surfaces of the green light-emitting diode 122 and the blue light-emitting diode 123, respectively, and the ratio of the front light-emitting and the side light-emitting of the red light-emitting diode 121, the green light-emitting diode 122 and the blue light-emitting diode 123 is 1:0.5-1: 5; in some alternative embodiments, the ratio of front-side light-emitting to side light-emitting of the red led 121, the green led 122, and the blue led 123 is 1: 3.
In a preferred embodiment of the present invention, the second optical reflective film is formed of 12 pairs of SiO 2 And Ti 3 O 5 The reflectance of the second optical reflection film 282 is 90% on average in the range of 500nm to 700 nm; and the third optical reflection film is made of 6 pairs of SiO 2 And Ti 3 O 5 The third optical reflection film 283 has an average value of 60% in the range of 400-600 nm.
In addition, SiO in the second optical reflection film 282 shown in the present embodiment 2 With Ti 3 O 5 The optical thickness of the material is 125nm-175nm, and SiO in the third optical reflection film 283 2 With Ti 3 O 5 The optical thickness of the material is 100nm-150nm respectively.
Compared with the prior art, the mini-LED module shown in the embodiment has the advantages that:
by disposing the second optical reflection film 282 on the light exit surface of the red light emitting diode 121, that is, on the side of the substrate 21 of the red light emitting diode 121 away from the bonding layer 22, the second optical reflection film 282 can reflect most of the light rays, and can ensure that a small part of the light rays can transmit through the second optical reflection film 282; a third optical reflection film 283 is respectively arranged on the light-emitting surfaces of the green light-emitting diode 122 and the blue light-emitting diode 123, namely on the side, far away from the epitaxial layer 23, of the substrate 21 in the green light-emitting diode 122 and the blue light-emitting diode 123, and the third optical reflection film 283 can reflect most of light rays and can ensure that a small part of light rays can transmit the third optical reflection film 283; the ratio of the front light-emitting to the side light-emitting of the red light-emitting diode 121, the green light-emitting diode 122 and the blue light-emitting diode 123 is 1:0.5-1:5, so that the light mixing effect of any two or three light-emitting diodes in a pixel point emitting light simultaneously is ensured; when the mini-LED module is applied to the display screen 100, even if the front white balance of the display screen 100 occurs, the situation that one side of the display screen 100 is red and the other side of the display screen is blue due to insufficient light mixing can not occur.
EXAMPLE III
Referring to fig. 5, a third embodiment of the present invention provides a display screen 100, which includes the mini-LED module of the first embodiment or the second embodiment;
in the display screen 100, a mini light emitting diode chip in a mini-LED module faces one side of the display screen 100, so that light is projected onto the display screen 100 by a plurality of pixel points in the mini-LED module to emit light, and the display screen 100 can display optical patterns.
In this embodiment, on the premise that the light emitting surface of at least one of the red light emitting diode 121, the green light emitting diode 122, and the blue light emitting diode 123 in each pixel is provided with the optical reflection film, the ratio of the front luminous flux to the side luminous flux of the light emitting diodes can be controlled, so that the ratio of the front luminous flux to the side luminous flux of the light emitting diodes in each pixel is the same, and the problems of insufficient light mixing and color cast of the rear side of the display screen 100 when the mini light emitting diode is applied are solved.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A mini-LED module is characterized by comprising N mini light-emitting diode chips arranged on a circuit board, wherein each mini light-emitting diode comprises a red light-emitting diode, a green light-emitting diode and a blue light-emitting diode with different light-emitting colors, and the N mini light-emitting diode chips are used for forming M pixel points;
in each pixel point, an optical reflection film is arranged on a light emergent surface of at least one of the red light emitting diode, the green light emitting diode and the blue light emitting diode.
2. The mini-LED module as claimed in claim 1, wherein the red light emitting diode is provided with a first optical reflection film on a side of the substrate away from the bonding layer, and the reflectivity of the first optical reflection film is between 70% and 90% within 500nm to 700 nm.
3. The mini-LED module as set forth in claim 2, wherein the ratio of front light extraction to side light extraction of the red LEDs to the green LEDs and the blue LEDs is equal.
4. The mini-LED module as claimed in claim 3, wherein the ratio of front light extraction to side light extraction of the red light-emitting diode to the green light-emitting diode and the blue light-emitting diode is 1: 0.75.
5. The mini-LED module as claimed in claim 1, wherein the red light-emitting diode is provided with a second optical reflection film on a side of the substrate away from the bonding layer, the green light-emitting diode and the blue light-emitting diode are respectively provided with a third optical reflection film on a side of the substrate away from the epitaxial layer, a reflectivity of the second optical reflection film is between 70% and 98% within 500nm-700nm, and a reflectivity of the third optical reflection film is between 50% and 95% within 400nm-600 nm.
6. The mini-LED module as set forth in claim 5, wherein the ratio of front light extraction to side light extraction of the red LEDs to the green LEDs and the blue LEDs is equal.
7. The mini-LED module as claimed in claim 6, wherein the ratio of front light emission to side light emission of the red light-emitting diode to the green light-emitting diode and the blue light-emitting diode is 1:0.5-1: 5.
8. A display screen, characterized by comprising the mini-LED module set of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221406621.6U CN217506831U (en) | 2022-06-07 | 2022-06-07 | Mini-LED module and display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221406621.6U CN217506831U (en) | 2022-06-07 | 2022-06-07 | Mini-LED module and display screen |
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| Publication Number | Publication Date |
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| CN217506831U true CN217506831U (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221406621.6U Active CN217506831U (en) | 2022-06-07 | 2022-06-07 | Mini-LED module and display screen |
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| CN (1) | CN217506831U (en) |
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- 2022-06-07 CN CN202221406621.6U patent/CN217506831U/en active Active
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