CN220692021U - Display module and electronic device - Google Patents
Display module and electronic device Download PDFInfo
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- CN220692021U CN220692021U CN202322355903.9U CN202322355903U CN220692021U CN 220692021 U CN220692021 U CN 220692021U CN 202322355903 U CN202322355903 U CN 202322355903U CN 220692021 U CN220692021 U CN 220692021U
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- 239000000758 substrate Substances 0.000 claims abstract description 13
- 238000004806 packaging method and process Methods 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 40
- 238000002834 transmittance Methods 0.000 claims description 28
- 239000011241 protective layer Substances 0.000 claims description 17
- 238000003475 lamination Methods 0.000 claims 1
- 238000005538 encapsulation Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000011056 performance test Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000005022 packaging material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The application belongs to the technical field of display. The application provides a display module, which comprises a light-emitting module and a packaging layer; the light-emitting module comprises a substrate and a light-emitting device arranged on the substrate; the packaging layer comprises a dark part attached to the light-emitting device and a transparent part attached to one side of the dark part far away from the light-emitting device; the dark part comprises a first dark part positioned on the surface of the light emitting device and a second dark part positioned in a gap between adjacent light emitting devices, and the ratio of the thickness of the first dark part to the thickness of the second dark part is 0.1-0.5. The application also provides an electronic device. The dark part of the display module has higher refractive index, and light emitted by the light emitting device can be gathered more after being refracted by the dark part, so that the image of the display module is clearer.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a display module and an electronic device.
Background
The direct display type light emitting module is popular with people due to smaller size and higher pixel density. Along with the increase of market demands, the pixel density of the direct display light emitting module is higher and higher, and the interval between light emitting devices is smaller and smaller. In the prior art, a COB (chip On Board) packaging process is generally used to package the small-pitch light emitting device.
However, in the process of implementing the technical solution of the embodiment of the present application, the applicant finds that at least the following technical problems exist in the above technology:
at too small a distance, the pixels will cross each other, so that the phenomena of blurring and overlapping of the images of the light emitting module become serious. The COB packaging process also causes the trichromatic light to reflect inside the package layer of the light emitting device, which makes the crosstalk between pixels more serious.
Disclosure of Invention
The embodiment of the application solves the problems of mutual crosstalk among pixels of a light emitting device, image blurring and overlapping of the light emitting module and the like in the prior art by providing the display module. The image of the display module is clearer.
The application provides a display module, which comprises a light emitting module and a packaging layer; the light-emitting module comprises a substrate and a light-emitting device arranged on the substrate; the packaging layer comprises a dark part attached to the light-emitting device and a transparent part attached to one side of the dark part far away from the light-emitting device; the dark part comprises a first dark part positioned on the surface of the light emitting device and a second dark part positioned in a gap between adjacent light emitting devices, and the ratio of the thickness of the first dark part to the thickness of the second dark part is 0.1-0.5.
Further, the thickness of the first dark portion is 5-20um, and the thickness of the second dark portion is 15-30um.
Further, the ratio between the thickness of the second dark portion and the height of the light emitting device is 1: (1-4).
Further, the refractive index of the dark portion is 1.3-1.7, the L value of the dark portion is 10-40, and the light transmittance of the first dark portion is 50% or less.
Further, the difference between the light transmittance of the transparent portion and the light transmittance of the second dark portion is 30% to 90%.
Further, the ratio between the thickness of the transparent portion and the thickness of the second dark portion is 1: (0.2-0.6).
Further, the transmittance of the transparent part is 80% -95%, the haze of the transparent part is 20% -95%, the glossiness of the transparent part is 8-60GU, the hardness of the transparent part is 2-4H, and the thickness of the transparent part is 60-120 mu m.
Further, the adhesion between the dark part and the transparent part is greater than 150N/cm 2 The adhesion between the dark part and the substrate is more than 80N/cm 2 。
Further, a protective layer is further arranged on one side, far away from the dark part, of the transparent part, the thickness of the protective layer is 25-150 mu m, the glossiness of the protective layer is 8-20GU, and the difference between the light transmittance of the protective layer and the light transmittance of the second dark part after the protective layer and the transparent part are laminated is 30% -90%.
The application also provides an electronic device, which comprises the display module of any one of the above.
In this application, the part dark part of display module assembly is located the surface of light emitting device, and dark part has higher refracting index, and the light of light emitting device transmission can gather more after dark part refraction, makes display module assembly's image more clear.
Drawings
Fig. 1 is a schematic cross-sectional structure of a display module according to an embodiment of the disclosure;
FIG. 2 is a schematic cross-sectional view of a display module according to another embodiment of the disclosure;
FIG. 3 is a schematic cross-sectional view of a display module according to another embodiment of the disclosure;
FIG. 4 is a schematic cross-sectional view of an encapsulating material according to an embodiment of the present application;
fig. 5 is a schematic cross-sectional view of the display module of comparative example 1.
In the figure: the display module 100, the light emitting module 11, the substrate 111, the light emitting device 112, the encapsulation layer 12, the transparent portion 121, the dark portion 122, the first dark portion 1221, the second dark portion 1222, the protective layer 123; encapsulation material 200, light-transmitting layer 21, dark layer 22.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
The application provides a display module 100 as shown in fig. 1, wherein the display module 100 includes a light emitting module 11 and a packaging layer 12 disposed on the light emitting module 11. The light emitting module 11 includes a substrate 111 and a light emitting device 112 disposed on the substrate 111. The encapsulation layer 12 includes a transparent portion 121 and a dark portion 122, the dark portion 122 is attached to the surface of the light emitting module 11, and the transparent portion 121 is disposed on a side of the dark portion 122 away from the light emitting module 11. The dark portion 122 includes a first dark portion 1221 located at a surface of the light emitting device 112 and a second dark portion 1222 located in a gap between adjacent light emitting devices 112.
As an alternative embodiment, as shown in fig. 2, the ratio between the thickness H1 of the first dark portion 1221 and the thickness H2 of the second dark portion 1222 is 0.1 to 0.5. Preferably, the ratio between the thickness H1 of the first dark portion 1221 and the thickness H2 of the second dark portion 1222 is 0.15 to 0.5. More preferably, the ratio between the thickness H1 of the first dark portion 1221 and the thickness H2 of the second dark portion 1222 is 0.2 to 0.5. The first dark portion 1221 is ensured to refract the light emitted by the light emitting device, so that the light is more concentrated, and the second dark portion is ensured to absorb the light, so that the light reflection is reduced, the light of the display module 100 is clearer and clearer, and the contrast ratio is higher.
As an alternative embodiment, the thickness H1 of the first dark portion 1221 is 5-20um and the thickness H2 of the second dark portion 1222 is 15-30um. The thickness H1 of the first dark portion 1221 is 5-20um, so that the dark portion 122 disposed on the surface of the light emitting device 112 can collect light, and the dark portion 122 has less influence on the light emitting intensity of the display module 100, and light emitting efficiency is ensured. The thickness H2 of the second dark portion 1222 is 15-30um, which can ensure that the dark portion 122 can absorb part of the light, and can also improve the contrast, so that the light of the display module 100 is clearer and clearer.
As an alternative embodiment, the ratio between the thickness H2 of the second dark portion 1222 and the height H4 of the light emitting device 112 is 1: (1-4) it is possible to ensure that the second dark portion 1222 can well improve contrast and absorb part of light, making the light of the display module 100 more vivid. The first dark portion 1221 is disposed on the surface of the light emitting device 112, and has a lower thickness, a higher transmittance, and a smaller influence on the light intensity of the display module 100. If the thickness H2 of the second dark portion 1222 is greater than the height of the light emitting device, the light emitted from the light emitting device 112 to the outside is blocked, so that the brightness of the display module 100 is reduced; in addition, even if the thickness of the second dark portion 1222 is slightly lower than the height of the light emitting device, a certain shielding of light emitted from the side of the light emitting device is caused. However, the dark portion 122, especially the second dark portion 1222, is too thin and has insufficient black value, which affects the contrast of the display module, and the display image is not clear. Therefore, the ratio between the thickness H2 of the second dark portion 1222 and the height H4 of the light emitting device 112 is 1: (1-4), the second dark portion 1222 is ensured to be capable of improving contrast and absorbing part of light, and has less influence on the light output intensity of the display module 100.
As an alternative embodiment, the light transmittance of the first dark portion 1221 is 50% or less, the light transmittance of the second dark portion 1222 is 50% or less, the refractive index of the dark portion 122 is 1.3 to 1.7, and the L value of the dark portion 122 is 10 to 40. The light transmittance of the dark portion 122 is 50% or less, and it is ensured that the light does not cross between the adjacent light emitting devices 112 after the dark portion 122 is formed. The refractive index of the dark portion 122 is 1.3-1.7, so that the light emitted by the light emitting device 112 can be more concentrated, and the light of the display module 100 can be more clear. The L value of the dark portion 122 is 40 or less, so that the contrast of the display module 100 can be improved by improving the contrast of the dark portion 122.
As an alternative embodiment, the refractive index of the dark layer 22 in the encapsulating material 200 is greater than that of the light-transmitting layer 21, and after the encapsulating material 200 forms the encapsulating layer 12, light is refracted above the light-emitting device 112 when reaching the transparent portion 121 from the first dark portion 1221, so that the light is better collected, and the light scattering phenomenon is optimized, so that the light of the display module 100 is clearer.
As an alternative embodiment, the difference between the transmittance of the second dark portion 1222 and the transmittance of the transparent portion 121 is 30% -90%, so that the contrast can be improved, and the light of the display module 100 can be more vivid and the image can be more clear.
As an alternative embodiment, the ratio between the thickness H3 of the transparent part 121 and the thickness H2 of the second dark part 1222 is 1: (0.2-0.6), ensuring that the transparent portion 121 is well defined with the dark portion 122, ensuring that a sufficient amount of dark portion can be pressed into the gap of the light emitting device 112 and bonded to the substrate 111, acting as a second dark portion 1222, while ensuring that a proper amount of dark portion remains on the surface of the light emitting device 112 as a first dark portion 1221.
As an alternative embodiment, the transmittance of the transparent part 121 is 80% -95%, the haze of the transparent part 121 is 20% -95%, the gloss of the transparent part 121 is 8-60GU, and the hardness of the transparent part 121 is 2-4H. The light transmittance of the transparent portion 121 is 80% -95%, so that the light transmittance of the transparent portion 121 can be guaranteed to be good, and the light output intensity of the display module 100 is high. The haze of the transparent portion 121 is 20% to 95% to ensure high light transmission quality of the transparent portion 121. The glossiness of the transparent portion 121 is 8-60GU, so that the transparent portion 121 has better light transmittance, and the light rays of the display module 100 are clearer. The hardness of the transparent part 121 is 2-4H, so that the transparent part 121 is complete in structure, the transparent part 121 is guaranteed to have certain protection and supporting capabilities, and other parts of the transparent part 121 cannot be damaged during hot pressing.
As an alternative embodiment, the thickness H3 of the transparent portion 121 is 60-120 μm, and the transparent portion 121 of the dark portion 122 needs to have a certain thickness, so that the transparent portion 121 has a good packaging effect and a good light homogenizing effect, and the dark portion 122 and the light emitting device 112 can be protected. The transparent portion 121 is not too thick, and the increase of the thickness may decrease the transmittance of the transparent portion 121, thereby affecting the light output intensity of the display module 100. The thickness H3 of the transparent part 121 is 60-120 μm, which can make the transparent part 121 have good package reliability while having high light transmittance.
As an alternative embodiment, the adhesion between the dark portion 122 and the transparent portion 121 is greater than 150N/cm 2 The adhesion between the dark portion 122 and the substrate 111 is greater than 80N/cm 2 The dark part 122 and the transparent part 121 are not easy to separate, the whole structure of the display module 100 is ensured to be stable, and the reliability of the display module 100 is improved.
As an alternative embodiment, as shown in fig. 3, a protective layer 123 is further provided on the side of the transparent portion 121 remote from the dark portion 122. The protective layer 123 is disposed on the outermost layer of the encapsulation layer 12, and can improve the mechanical strength of the display module and protect the light emitting module. The thickness of the protective layer 123 is 25-150 μm, so that the protective layer 123 has high strength and good light transmission performance. The refractive index of the protective layer 123 is 1.3-1.7, preferably, the refractive index of the protective layer 123 is 1.4-1.6, so that the light emitting module has a better light emitting effect. The difference between the transmittance of the protective layer 123 and the transmittance of the second dark portion 1222 after being laminated with the transparent portion 121 is 30% -90%. The first dark portion 1221 is ensured to be capable of improving contrast, so that light rays of the display module 100 are more vivid.
As an alternative embodiment, the encapsulation layer 12 is formed of the light emitting device encapsulation material 200 shown in fig. 4. The encapsulation material 200 includes a light-transmitting layer 21 and a dark layer 22, the dark layer 22 being provided on one side of the light-transmitting layer 21. When the packaging material 200 is used for packaging the light-emitting module 11, the packaging material 200 and the light-emitting module 11 are pressed together by adopting a hot rolling or vacuum laminating machine, and the dark layer 22 of the packaging material 200 forms the dark part 122 of the packaging layer 12; wherein a portion of the dark layer 22 is extruded into the light emitting device 112 gap, cured to form a second dark portion 1222; another portion of the dark layer 22 is attached to and around the light emitting device 112 and cured to form a first dark portion 1221. The light-transmitting layer 21 of the encapsulation material 200 forms the transparent portion 121 of the encapsulation layer 12. The second dark portion 1222 formed may absorb part of the light from the light emitting device 112, reducing reflection of the light inside the encapsulation layer 12. The light rays are refracted when passing through the interface between the first dark portion 1221 and the transparent portion 121, so that the light rays are converged in the same direction, and the crosstalk between the adjacent light emitting devices 112 is reduced, so that the image of the display module 100 is clearer. The first dark portion 1221 and the second dark portion 1222 together play a role in improving the contrast of the light emitting module 11, and the greater the thickness of the first dark portion 1221 and the second dark portion 1222, the higher the blackness value, and the higher the contrast of the entire package layer 12; however, since the first dark portion 1221 and the second dark portion 1222 are derived from the dark layer 22, the thicknesses of both are mutually related to each other, that is, the more dark layer portions remain on the top and around the light emitting device 112, the less dark layer portions are pressed into the gap. In addition, if the dark color layer remained on the top and periphery of the light emitting device 112 is too much, the light extraction efficiency is affected; if the dark layer portion pressed into the gap is too much, the second dark layer is too thick, which also affects the light extraction efficiency. However, if one of the first dark layer and the second dark layer is too thin, the overall blackness value is affected even if the other is sufficiently thick. The present utility model defines that the ratio between the thickness H1 of the first dark portion 1221 and the thickness H2 of the second dark portion 1222 is 0.1 to 0.5 in view of the combination of blackness value, light-emitting efficiency, display effect, and the like.
The application also provides an electronic device, which comprises any one of the display modules. The light of the display module assembly in this application gathers more, and the definition is high, can make the display module assembly have better visual effect.
The present application is further described below with reference to examples, but the scope of protection of the present application is not limited to the examples.
Examples and comparative examples are set forth in tables 1, 2 and 3.
Table 1: examples table
Table 2: examples table
Table 3: examples comparative example table
* And (3) injection: the encapsulation layers in examples 1-12 and comparative examples 1-3 are not entirely equal in thickness, and thus the thicknesses referred to are average thicknesses, which are averages of the thicknesses measured at any 5 sites.
1. Performance test:
performance tests were performed on the display modules in the above examples and comparative examples.
1. Adhesive force test: test methods reference standard GB/T2790 test method for 180℃peel strength of Adhesives Flexible vs. rigid Material. Sample size: 100mm x 100mm; stretching speed: 100mm/min.
2. Refractive index test: the refractive index of the dark portion and the refractive index of the transparent portion were respectively measured using a 2WAJ Abbe refractometer.
3. Thickness test: the thickness of the dark layer and the light-transmitting layer were measured by a metallographic microscope, and five sets of data were measured and averaged.
4. Light transmittance, L value, haze test: using a color haze meter (color spectrum CS-700), measuring the transmittance of each place at 5 places randomly selected on the surface of a test sample under the conditions of 6500K color temperature and 10-degree observation window, and taking an average value of the obtained results.
5. And (3) testing the crosstalk interference degree: and selecting a square area with the length of 2cm and the length of 2cm on the display module to be tested, and respectively testing the average value L1 of the brightness of each pixel when all the pixels in the selected area are lightened and the average value L2 of the brightness of each lightened pixel when one pixel is lightened at intervals, wherein the value of the crosstalk interference degree is= (L1-L2), and the crosstalk interference ratio is= (L1-L2)/L1.
2. Performance test results:
the results of the performance test of the above examples and comparative examples are shown in Table 4.
Table 4: test results
As can be seen from examples 1 to 12 and comparative example 1, the first dark portion can reduce crosstalk between pixels of the light emitting device, and further concentrate light. As is clear from comparison of example 1, example 11, example 12 and comparative example 2, the concentration effect of the encapsulation layer on the light is better as the thickness ratio of the first dark portion to the second dark portion is higher, whereas the concentration effect of comparative example 2 is worse due to the too low thickness ratio, and the crosstalk is larger. In comparative example 3, the ratio of the thickness of the first dark portion to the thickness of the second dark portion is too large, and although the dark portion can also gather light well, the brightness of light is low and the visual effect is poor because the ratio of the thickness of the first dark portion to the thickness of the second dark portion is too large. The encapsulation layers in examples 1-12 have good adhesion and high reliability. The display modules in embodiments 1-12 have the advantages of small crosstalk interference degree, higher brightness, clearer images and better visual effect.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (10)
1. A display module, comprising:
the light-emitting module comprises a substrate and a light-emitting device arranged on the substrate;
the packaging layer comprises a dark part attached to the light-emitting device and a transparent part attached to one side, far away from the light-emitting device, of the dark part;
the dark color part comprises a first dark color part positioned on the surface of the light-emitting device and a second dark color part positioned in a gap between adjacent light-emitting devices, and the ratio of the thickness of the first dark color part to the thickness of the second dark color part is 0.1-0.5.
2. The display module assembly of claim 1, wherein:
the thickness of the first dark part is 5-20um, and the thickness of the second dark part is 15-30um.
3. The display module assembly of claim 2, wherein:
the ratio between the thickness of the second dark portion and the height of the light emitting device is 1: (1-4).
4. The display module assembly of claim 1, wherein:
the refractive index of the dark part is 1.3-1.7, the L value of the dark part is 10-40, and the light transmittance of the first dark part is less than or equal to 50%.
5. The display module assembly of claim 1, wherein:
the difference between the light transmittance of the transparent part and the light transmittance of the second dark part is 30% -90%.
6. The display module assembly of claim 5, wherein:
the ratio between the thickness of the transparent portion and the thickness of the second dark portion is 1: (0.2-0.6).
7. The display module assembly of claim 5, wherein:
the light transmittance of the transparent part is 80% -95%, the haze of the transparent part is 20% -95%, the glossiness of the transparent part is 8-60GU, the hardness of the transparent part is 2-4H, and the thickness of the transparent part is 60-120 mu m.
8. The display module assembly of claim 1, wherein:
the adhesion between the dark part and the transparent part is more than 150N/cm 2 The adhesion between the dark part and the substrate is more than 80N/cm 2 。
9. The display module assembly of claim 1, wherein:
the transparent part is further provided with a protective layer on one side far away from the dark part, the thickness of the protective layer is 25-150 mu m, the glossiness of the protective layer is 8-20GU, and the difference between the light transmittance of the protective layer and the transparent part after lamination and the light transmittance of the second dark part is 30% -90%.
10. An electronic device, characterized in that:
the electronic device comprising the display module of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322355903.9U CN220692021U (en) | 2023-08-30 | 2023-08-30 | Display module and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322355903.9U CN220692021U (en) | 2023-08-30 | 2023-08-30 | Display module and electronic device |
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| Publication Number | Publication Date |
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| CN220692021U true CN220692021U (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322355903.9U Active CN220692021U (en) | 2023-08-30 | 2023-08-30 | Display module and electronic device |
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| CN (1) | CN220692021U (en) |
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- 2023-08-30 CN CN202322355903.9U patent/CN220692021U/en active Active
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