CN218241242U - LED display screen based on film doubling - Google Patents
LED display screen based on film doubling Download PDFInfo
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- CN218241242U CN218241242U CN202121043196.4U CN202121043196U CN218241242U CN 218241242 U CN218241242 U CN 218241242U CN 202121043196 U CN202121043196 U CN 202121043196U CN 218241242 U CN218241242 U CN 218241242U
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- dry glue
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Abstract
The invention discloses an LED display screen based on film doubling, which comprises: the display screen comprises a flexible transparent display screen, a dry glue layer and a high-transparency film layer; wherein flexible transparent display screen includes: the flexible transparent display screen comprises a flexible transparent display screen substrate, an LED chip dot matrix and an FPC flexible circuit board. The dry glue layer is arranged on the flexible transparent display screen, and the high-transparency thin film layer is arranged on the dry glue layer. The dry glue layer is a polyethylene vinyl acetate copolymer dry glue, and has the advantages of softness, high transparency, low haze, good air tightness, low curing temperature, no bubbles and the like. The flexible transparent LED display screen made of the polyethylene vinyl acetate copolymer dry glue has the advantages of durability, water resistance, mildew resistance, corrosion resistance, softness, high transparency and the like.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to an LED display screen based on film laminating.
Background
Along with the rapid development of science and technology, a plurality of novel display screens also appear in the field of LED display screens, wherein the transparent display screen is the fastest development speed. The transparent display screen comprises a grid screen, an LED intelligent glass screen and a flexible transparent LED display screen. The flexible transparent LED display screen has the advantages of good light transmission, light weight, thinness, random bending and the like, but because the substrate of the flexible transparent LED display screen is very thin, the LED chip and the substrate are required to have certain firmness to ensure the quality of the flexible transparent display screen, so that a protection mode which can enhance the firmness of the LED and can ensure other characteristics of the flexible transparent display screen is required.
Disclosure of Invention
According to the problems in the prior art, the invention discloses an LED display screen based on film laminating, and the specific scheme comprises the following steps: the flexible transparent display screen substrate is provided with a transparent conducting circuit and a solid bonding pad, the solid bonding pad is connected with an LED chip and an FPC (flexible printed circuit) flexible printed circuit board, the surfaces of the end parts of the LED chip and the FPC flexible printed circuit board and on the flexible transparent display screen substrate are provided with a dry adhesive layer, and the upper surface of the dry adhesive layer is provided with a high-transparency thin film layer.
The high-transparency film layer is a high-transparency PET, acrylic, COP or CPI optical film.
The LED chip is connected with the FPC flexible circuit board through a transparent conducting circuit, and control signals and power signals of the LED display screen based on the film laminated adhesive are transmitted to the LED chip through the FPC flexible circuit board (104) and the transparent conducting circuit.
The LED chip is connected to the flexible transparent display screen substrate in a single-row or multi-row cascading mode, and the LED chip is packaged into a whole by the driving chip and the epitaxial wafer.
According to the LED display screen based on the film laminated adhesive, the dry adhesive layer is the polyethylene vinyl acetate copolymer dry adhesive, so that the LED display screen has the advantages of softness, high transparency, low haze, good air tightness, low curing temperature, no bubbles and the like. The flexible transparent LED display screen made of the polyethylene vinyl acetate copolymer dry glue has the advantages of durability, water resistance, mildew resistance, corrosion resistance, softness, high transparency and the like.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view of a processing structure according to the present invention;
FIG. 4 is a schematic view of a processing structure according to the present invention;
FIG. 5 is a schematic diagram of the connection between the bonding pad of the LED chip and the transparent conductive circuit according to the present invention;
FIG. 6 is a schematic view of the connection between the FPC pad and the transparent conductive trace according to the present invention;
FIG. 7 is a pin diagram of an LED chip according to the present invention;
FIG. 8 is a schematic diagram of the connection of LED chips in the present invention;
in the figure: 100. flexible transparent display screen base plate, 101, dry glue layer, 102, high transparent thin film layer, 103, LED chip dot matrix, 104, FPC soft arranging wire, 105, carrier plate tool, 106, hot pressing tool, 107, cylinder hot pressing tool, 108, transparent conducting wire, 109, solid pad
Detailed Description
As shown in fig. 1 to 2, the present invention discloses an LED display screen based on a film lamination, comprising: the flexible transparent display screen comprises a flexible transparent display screen substrate 100, wherein a transparent conductive circuit 108 and a solid bonding pad 109 are arranged on the flexible transparent display screen substrate 100, an LED chip 103 and an FPC (flexible printed circuit) flexible flat cable 104 are connected to the solid bonding pad 109, a dry glue layer 101 is arranged on the flexible transparent display screen, a high-transparency thin film layer 102 is arranged on the dry glue layer 101, and the dry glue layer 101 is a polyethylene vinyl acetate copolymer dry glue and has the advantages of softness, high transparency, low haze, good air tightness, low curing temperature, no bubbles and the like.
Further, the high-transparency film layer 102 is made of a high-transparency PET, acrylic, COP or CPI optical film.
Further, as shown in fig. 5 and 6, the LED chip 103 and the FPC flexible flat cable 104 are connected by a transparent conductive line, and external control signals and power signals are transmitted to the LED chip 103 through the FPC flexible flat cable 104 and the transparent conductive line.
Further, the LED chips 103 on the flexible transparent display screen can form a single-row and multi-row cascade connection mode; the LED chips 103 are formed by packaging a driving chip and an epitaxial wafer together, each LED chip 103 has data processing capability, so that each pixel point on the flexible transparent display screen can be controlled to have the same brightness and chromaticity, and the whole screen has no color difference and other problems, and the external connection and control are simple, so that the video display of the whole flexible transparent display screen can be realized by externally providing only a power signal and a serial control signal, as shown in fig. 7 to 8.
Since the LED chip 103 on the flexible transparent LED display screen has a certain height, the thickness of the adhesive drying layer 101 is higher than the height of the LED chip 103. By utilizing the melting characteristic of the polyethylene vinyl acetate copolymer dry glue, the dry glue has good fluidity and good tensile strength when being in a molten state in the process of heating at low temperature and applying certain pressure, so that the periphery of the LED chip 103 is filled with the dry glue, and the upper surface is kept in a flat and bubble-free state.
A manufacturing process of an LED display screen based on film laminating comprises the following steps: as shown in fig. 3
S1, cleaning the surface of a flexible transparent display screen to be free of dust and other impurities;
s2, flatly paving the flexible transparent display screen on a support plate jig with a heating function;
s3, in a vacuum environment, flatly spreading dry glue on a flexible transparent display screen to form a dry glue layer 101;
s4, spreading a high-transparency film on the dry glue layer 101 to form a high-transparency film layer 102;
s5, pressing the flat lamination jig on the high-transparency film, heating to 80-140 ℃ at the same time, preferably 90 ℃ as the optimal heating temperature, and simultaneously applying certain pressure;
s6, after a certain time, the dry glue reaches the self melting state, and the periphery of the LED chip 103 is filled with the dry glue;
s7, carrying out ultraviolet light or visible light curing on the integrated flexible transparent display screen;
s8, after curing for a certain time, cleaning up the dry glue overflowing from the edge of the flexible transparent display screen with the high-transparency film layer 102;
s9, electrifying and aging test;
the above steps are operated in a vacuum environment.
Another process step is shown in FIG. 4
S1, cleaning the surface of a flexible transparent display screen to be free of dust and other impurities;
s2, flatly paving the flexible transparent display screen on a support plate jig with a heating function;
s3, in a vacuum environment, flatly spreading dry glue on a flexible transparent display screen to form a dry glue layer 101;
s4, spreading a high-transparency film on the dry glue layer to form the high-transparency film;
s5, pressing the cylindrical hot-pressing jig on the high-transparency film, rolling at a fixed speed to enable the dry glue layer to be free of bubbles, and simultaneously heating (preferably at a low temperature of 90 ℃) and applying certain pressure;
s6, heating and pressing to enable the dry glue to reach a self-melting state and enable the periphery of the LED to be filled with the dry glue;
s7, carrying out ultraviolet light or visible light curing on the integrated flexible transparent display screen;
s8, after curing for a certain time, cleaning up dry glue overflowing from the edge of the flexible transparent display screen with the protective layer;
and S9, electrifying and aging test.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The utility model provides a LED display screen based on film doubling which characterized in that includes: the flexible transparent display screen substrate (100) is provided with a transparent conducting circuit (108) and a solid bonding pad (109) on the flexible transparent display screen substrate (100), an LED chip (103) and an FPC (flexible printed circuit) board (104) are connected on the solid bonding pad (109), a dry glue layer (101) is arranged on the flexible transparent display screen substrate (100) and on the surfaces of the end parts of the LED chip (103) and the FPC (104), and a high-transparency thin film layer (102) is arranged on the upper surface of the dry glue layer (101).
2. The film-sandwiched LED display screen according to claim 1, wherein: the high-transparency film layer (102) is made of a high-transparency PET, acrylic, COP or CPI optical film.
3. The LED display screen based on the film laminating adhesive of claim 1, wherein: the LED chip (103) is connected with the FPC (flexible printed circuit) board (104) through a transparent conducting circuit, and control signals and power signals of the LED display screen based on the film laminated adhesive are transmitted to the LED chip (103) through the FPC (104) and the transparent conducting circuit.
4. The film-sandwiched LED display screen according to claim 1, wherein: the LED display screen is characterized in that the LED chips (103) are connected to the flexible transparent display screen substrate (100) in a single-row or multi-row cascading mode, and the LED chips (103) are packaged into a whole by the driving chips and the epitaxial wafer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121043196.4U CN218241242U (en) | 2021-05-14 | 2021-05-14 | LED display screen based on film doubling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121043196.4U CN218241242U (en) | 2021-05-14 | 2021-05-14 | LED display screen based on film doubling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218241242U true CN218241242U (en) | 2023-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121043196.4U Active CN218241242U (en) | 2021-05-14 | 2021-05-14 | LED display screen based on film doubling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218241242U (en) |
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2021
- 2021-05-14 CN CN202121043196.4U patent/CN218241242U/en active Active
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