CN110634414A - Transparent display module and manufacturing method thereof - Google Patents
Transparent display module and manufacturing method thereof Download PDFInfo
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- CN110634414A CN110634414A CN201910812671.0A CN201910812671A CN110634414A CN 110634414 A CN110634414 A CN 110634414A CN 201910812671 A CN201910812671 A CN 201910812671A CN 110634414 A CN110634414 A CN 110634414A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a transparent display module, which comprises a first light-transmitting layer, a second light-transmitting layer and a middle layer arranged between the first light-transmitting layer and the second light-transmitting layer, wherein a conductive circuit layer is also arranged between the first light-transmitting layer and the second light-transmitting layer, a lamp bead is arranged on the conductive circuit layer, the conductive circuit layer comprises at least two layers of printed circuits, and the printed circuits are electrically connected with the lamp bead. The invention also discloses a transparent display screen which is formed by combining the transparent display module. The transparent display module and the transparent display screen adopt at least two layers of printed circuits, so that the wiring area is increased, the diversification and small spacing of wiring are realized, and the improvement of the resolution of the transparent display module is facilitated; the transparent display module can adopt a dynamic scanning mode, and the power supply supplies power along with the scanning signals, so that the power consumption of the transparent display module is reduced.
Description
Technical Field
The present disclosure relates to display devices, and particularly to a transparent display module and a method for manufacturing the same.
Background
With the development of LED technology, various products adopting the LED technology are increasing. The conventional LED display screen has higher resolution ratio, and can be assembled into a large-format display device, so that the large-screen display screen is widely applied to outdoor large-screen display. Traditional outdoor LED screens are usually opaque, and are arranged outside an outdoor building in an externally-hung mode, so that lighting of the building is seriously affected.
In order to overcome the above disadvantages of the conventional LED screen, the transparent LED display screen is produced. The existing transparent LED display screen is generally provided with LED lamp beads on a substrate, the substrate is covered with a clamping film and then covered with a cover plate to form a whole, and the whole structure of the LED display screen comprises the substrate, the clamping film and the cover plate from bottom to top. However, in the existing transparent LED display screen, conductive glass is used as a substrate, and after the substrate is etched into a conductive circuit by an etching machine, LED beads are pasted on the conductive circuit by using conductive silver paste, so as to realize dot-matrix LED distribution; the LED lamp beads are connected with a drive board PCB through an FPC (flexible printed circuit), and then connected with a power supply and a controller, so that the control of the LED lamp beads is realized. As shown in figure 1: the conducting circuit 111 of the LED display screen 1 supplies power to the LED lamp beads 112, controls each LED lamp bead 112 and plays videos. The conductive glass 11 and the control board 16 are connected by a Flexible Printed Circuit (FPC)14, the FPC14 is connected with the PCB control board 16 by a connector 15, and the control board 16 is connected with an external circuit 17.
The conductive material commonly used for the transparent LED display screen is Indium Tin Oxide (ITO), and usually, after a laser line is used on conductive glass (a single-layer line, as shown in figure 1), LED lamp beads are glued on the conductive line by silver colloid to realize the dot-matrix LED distribution; and then the controller is connected to realize static scanning. The conductive glass of the existing transparent LED display screen uses an etching technology, is a single-layer circuit, has large resistance value, and influences the brightness and the brightness uniformity of a product. Due to the arrangement of the single-layer circuit, the arrangement number of the lamp beads is limited; the power supply is not powered off during signal transmission, so that the device can work continuously, and the power consumption of the product is high. Based on the single-layer circuit design and the large resistance value of the ITO, the existing transparent LED display screen cannot realize small spacing. For the existing display product, the minimum distance between full-color series lamp beads can only be 40mm, and the minimum distance between single-color series lamp beads can only be 20 mm; the spacing is limited, the resolution is low, and the method is not suitable for large-size products.
Therefore, how to enhance the brightness uniformity of the display screen product and improve the resolution of the display screen product is a problem to be solved urgently in the industry at present.
Disclosure of Invention
In order to solve the problems and defects of the existing LED display screen, the invention provides a transparent display module which comprises a first light-transmitting layer, a second light-transmitting layer and a middle layer arranged between the first light-transmitting layer and the second light-transmitting layer.
Further, the at least printed circuit is a silver conductive trace.
Furthermore, the at least two layers of printed circuits are respectively provided with an insulating layer.
Further, the insulating layer is an ink insulating layer.
Furthermore, the conducting circuits of the at least two layers of printed circuits are round chamfers at the joints of the circuits, and/or bridging structures are arranged at the joints of the circuits.
Furthermore, the conducting circuit layer is provided with a metal coating at the position of the lamp bead.
Further, the metal coating is a copper coating, a nickel coating or a chromium coating
Further, the first and second light transmitting layers are glass, PI, PET or PMMA.
Further, the intermediate layer is a thermoplastic material film, and the thermoplastic material film is a polyvinyl butyral film, an ethylene-vinyl acetate copolymer film or an ionic intermediate film.
Furthermore, the lamp beads are single-color lamp beads, three-color lamp beads or four-color lamp beads.
On the other hand, the invention also provides a manufacturing method of the transparent display module, which comprises the following steps:
processing a transparent substrate to form a first light-transmitting layer and a second light-transmitting layer, wherein the transparent substrate is glass, PI, PET or PMMA; forming a conductive circuit layer between the first light-transmitting layer and the second light-transmitting layer by a multi-layer printing method, wherein the conductive circuit layer comprises at least two layers of printed circuits; and forming an insulating layer on the at least two printed circuits;
a plurality of lamp beads are arranged on the conductive circuit layer, and the at least two layers of printed circuits are electrically connected with the lamp beads;
and a thermoplastic material film is arranged between the first light-transmitting layer and the second light-transmitting layer, and the first light-transmitting layer, the thermoplastic material film, the conductive circuit layer and the second light-transmitting layer are integrally formed into the transparent display module.
Further, the method of multi-layer printing comprises: and brushing a first layer of printed circuit on the second light-transmitting layer by using silver paste, forming a first ink insulating layer on the first layer of printed circuit by using a printing or spraying mode, brushing a second layer of printed circuit by using the silver paste, and forming a second ink insulating layer on the second layer of printed circuit.
Furthermore, the method provided by the invention further comprises the step of forming a metal coating at the position where the lamp beads are arranged on the conductive circuit layer.
Further, the first layer of printed circuit and the second layer of printed circuit are rounded at the junction, and/or a bridging structure is arranged at the junction of the lines.
In another aspect, the invention provides a transparent display screen, which includes a plurality of transparent display modules connected by a connecting structure to form the transparent display screen.
The transparent display module adopts a multilayer printing technology, increases the wiring number of the lamp panel, realizes small spacing, improves the product resolution, simultaneously adopts a dynamic scanning mode to drive the lamp panel, reduces power consumption, and is beneficial to realizing large-size LED display screens. The transparent display screen is formed by splicing the transparent display modules, has a simple structure, is convenient to assemble, meets the requirements of display screens with various shapes, and has wide application scenes.
Drawings
FIG. 1 is a schematic view of a conventional transparent LED display screen;
FIG. 2 is a schematic view of an overall structure of a transparent display module according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of the second light transmitting layer and the conductive line layer of fig. 2;
FIG. 4 is a schematic diagram illustrating a structure of one embodiment of the conductive trace layer of FIG. 2;
FIG. 5 is a schematic diagram illustrating another embodiment of the conductive trace layer shown in FIG. 2;
FIG. 6 is a flow chart of a method for manufacturing a transparent display module according to the present invention;
fig. 7 is a schematic structural diagram of the transparent display screen of the present invention.
Description of the component reference numbers:
1 LED display screen
11 conductive glass
111 conductive line
112 LED lamp bead
14 flexible circuit board
15 connector
16 PCB control panel
17 external circuit
20 transparent display module
21 first light transmitting layer
22 intermediate layer
23 second light-transmitting layer
231 first surface
232 conductive circuit layer
2321 first layer of printed circuit
2322 second layer of printed circuit
2323 round chamfer
241 first insulating layer
242 second insulating layer
25 lamp bead
A display area
A' peripheral region
40 transparent display screen
41 transparent display module
42 connection structure
43 sub-frame
31-34 steps
Detailed Description
The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In addition, the terms "above", "inside", "outside" and "a" are used in the present specification for the sake of clarity only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as the scope of the present invention.
Referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic overall structure diagram of a transparent display module according to an embodiment of the present invention. The invention provides a transparent display module 20, which comprises a first euphotic layer 21, a middle layer 22 and a second euphotic layer 23. The intermediate layer 22 is disposed between the first transparent layer 21 and the second transparent layer 23, and the first transparent layer 21, the intermediate layer 22 and the second transparent layer 23 are integrally formed from top to bottom as the transparent display module 20. As shown in fig. 3 and 4, a surface 231 of the second transparent layer 23 is provided with a plurality of LED beads 25 for displaying patterns and a conductive circuit layer 232 electrically connected to the beads 25 and controlling the operation of the beads 25. The lamp beads 25 are distributed on the second euphotic layer 23 in a dot matrix mode, the lamp beads 25 are connected with an external power supply and a controller through the conductive circuit of the conductive circuit layer 232, and signals of the controller are received to play videos. In this embodiment, the conductive trace layer 232 of the transparent display module 20 includes a first printed circuit 2321 and a second printed circuit 2322, a first insulating layer 241 is disposed on the first printed circuit 2321, and the first printed circuit 2321 is covered by the first insulating layer 241. The second layer of printed circuit 2322 is disposed on the first insulating layer, the second layer of printed circuit 2322 is disposed on the second insulating layer 242, and the second layer of printed circuit 2322 is covered by the second insulating layer 242.
As shown in fig. 4, according to an embodiment of the present invention, a line junction where the first layer of printed circuit 2321 contacts the first insulating layer 241 is a rounded corner structure 2323, and a line junction where the second layer of printed circuit 2322 contacts the second insulating layer 242 is a rounded corner 2323, so as to prevent the first insulating layer 241 and the second insulating layer 242 from breaking due to too large slope when contacting the first layer of printed circuit 2321 and the second layer of printed circuit 2322, which causes a problem of wire breakage.
As shown in fig. 5, according to another embodiment of the present invention, a junction of the first layer of printed circuit 2321 and the first insulating layer 241 is a rounded corner 2323, a junction of the second layer of printed circuit 2322 and the second insulating layer 242 is a rounded corner 2323, the first insulating layer 241 covers the first layer of printed circuit 2321 in a bridging and climbing manner, the second layer of printed circuit 2322 is formed on the first insulating layer 241 in a bridging and climbing manner, and the second insulating layer 242 also covers the second layer of printed circuit 2322 in a bridging and climbing manner. The first layer of printed circuit 2321, the first insulating layer 241, the second layer of printed circuit 2322 and the second insulating layer 242 form a bridge structure. The round chamfer 2323 and the bridging and climbing structure can avoid the problem of wire breakage caused by fracture of the printed circuit and the insulating layer due to too large gradient.
According to all the embodiments described above, the first layer of printed circuits 2321 and the second layer of printed circuits 2322 may be silver conductive lines made of conductive silver paste. The first insulating layer and the second insulating layer may be ink insulating layers made of insulating ink. When setting up first insulation layer and second insulation layer, can set up the metallic coating according to the position of lamp pearl 25, at the position at lamp pearl 25 place, like copper facing, nickel, perhaps chromium prevents that the two sides from switching on, and the lamp pearl paster of being convenient for is favorable to promoting the stability of product.
In all the embodiments of the present invention, the transparent display module can be divided into a display area a and a peripheral area a', and the conductive circuit layer can be disposed in the display area a. In another embodiment, the conductive circuit layer may also be disposed in both the display area a and the peripheral area a'.
In all of the above embodiments, the first light transmitting layer may be a rigid substrate, such as glass, or a flexible substrate, such as PI, PET or PMMA. The second light transmitting layer may be a substrate, such as conductive glass, or a flexible substrate, such as PI, PET or PMMA. The intermediate layer, the first intermediate layer and the second intermediate layer may be a thermoplastic material film such as a polyvinyl butyral film, an ethylene-vinyl acetate copolymer film, an ionic intermediate film or the like.
In the above embodiments of the present invention, the lamp beads may be single-color lamp beads, such as a red light emitting diode assembly, a green light emitting diode assembly, and a blue light emitting diode assembly, or three-color lamp beads or four-color lamp beads.
The first euphotic layer, the middle layer, the first middle layer, the second middle layer and the second euphotic layer are all made of light-permeable materials, so that the light permeability of the display module is improved, and the use attractiveness is enhanced.
The transparent display module provided by the invention adopts the multilayer printed circuit as the conductive circuit layer, can realize the diversification of routing through the circuit optimization design, can flexibly change the scanning mode, can also adjust the line width and the line distance, realize the setting of small line distance, reduce the conductive impedance, is favorable for improving the balance of the whole brightness of the transparent display module and the display resolution and reducing the power consumption.
As shown in fig. 6, the present invention further provides a method for manufacturing a transparent display module, which is used to prepare the transparent display module provided by the present invention, and the method provided by the present invention comprises the following steps:
step 32: forming a plurality of patterned conductive line layers between the first light-transmitting layer and the second light-transmitting layer by adopting a multi-layer printing method; wherein the conductive line layer comprises at least two layers of printed circuits; and forming an insulating layer on the at least two printed circuits;
step 33: the conductive circuit layer is provided with a plurality of lamp beads, and the conductive circuit layer is electrically connected with the lamp beads and used for controlling the on-off of the lamp beads;
step 34: and a thermoplastic material film is arranged between the first light-transmitting layer and the second light-transmitting layer, and the first light-transmitting layer, the thermoplastic material film, the conductive circuit layer and the second light-transmitting layer are integrally formed into the transparent display module.
In step 31, the transparent substrate may be a hard substrate, such as tempered glass, or a soft substrate, such as PI, PET or PMMA. In the step 32, the conductive circuit layer may be a silver conductive circuit made of silver paste. In the above step 33, the lamp beads are single-color lamp beads, three-color lamp beads or four-color lamp beads. In step 34, the thermoplastic film may be a polyvinyl butyral film, an ethylene-vinyl acetate copolymer film, or an ionic interlayer. The thermoplastic material film coats the metal grid conducting circuit.
The method of multi-layer printing in the step 32 includes: and brushing a first layer of printed circuit on the second light-transmitting layer by using silver paste, forming a first ink insulating layer on the first layer of printed circuit by using a printing or spraying mode, brushing a second layer of printed circuit by using the silver paste, and forming a second ink insulating layer on the second layer of printed circuit.
The manufacturing method of the transparent display module comprises the step of forming a metal coating at the position where the lamp beads are arranged on the conductive circuit layer in an electroplating mode, wherein the metal coating can be formed by copper plating, nickel plating or chromium plating, so that two sides are prevented from being conducted, and the surface mounting is facilitated.
According to the embodiment of the invention, the first layer printed circuit and the second layer printed circuit are subjected to fillet treatment at the connection positions of the first insulating layer and the second insulating layer so as to increase the oxidation resistance of the conductive circuit, and meanwhile, the bridging climbing technology (bridging structure) is adopted to prevent the disconnection, so that the disconnection caused by the uneven thickness problem of the multilayer circuit can be avoided.
As shown in the following table, the transparent display module prepared according to the present invention can satisfy the requirements of the construction and 3C: the falling ball impact stripping performance, the shot bag impact performance, the heat resistance and moisture resistance and the like can meet the product requirements.
The invention also provides a transparent display screen. As shown in fig. 7, the transparent display screen 40 of the present invention includes a plurality of the transparent display modules 41. The transparent display modules 41 are connected together by the connecting structure 42 to form the transparent display screen 40. Transparent display module assembly can satisfy the demand of product outward appearance in vice frame 43 according to the encapsulation of product demand when the concatenation. In this implementation, the number of the transparent display modules is 4, and the number of the transparent display modules in other embodiments can be set arbitrarily according to actual requirements.
The transparent display screen adopts a multilayer printing technology, increases the wiring number of the lamp panel, realizes small spacing, improves the product resolution, simultaneously adopts a dynamic scanning mode to drive the lamp panel, reduces power consumption, realizes high-definition media advertisement playing, and is beneficial to realizing large-size LED display screens. The transparent display screen is formed by splicing the transparent display modules, has a simple structure, is convenient to assemble, meets the requirements of display screens with various shapes, and has wide application scenes.
It should be understood that the above description of specific embodiments of the invention is only for illustrating the technical features of the invention, and the purpose of the invention is to enable those skilled in the art to understand the content of the invention and to implement the invention, but the invention is not limited to the specific embodiments described above. Any person skilled in the art can modify the above-described embodiments without departing from the spirit and scope of the present invention. It is intended that all such changes and modifications within the scope of the appended claims be covered by the invention.
Claims (15)
1. The utility model provides a transparent display module assembly, includes first euphotic layer, second euphotic layer and set up in intermediate level between first euphotic layer and the second euphotic layer, its characterized in that, first euphotic layer with still be provided with a conducting wire layer between the second euphotic layer, just be provided with the lamp pearl on the conducting wire layer, the conducting wire layer includes two-layer at least printed circuit, two-layer at least printed circuit with lamp pearl electric connection.
2. The transparent display module of claim 1, wherein the at least two layers of printed circuitry are silver conductive traces.
3. The transparent display module of claim 1, wherein the at least two layers of printed circuits each have an insulating layer disposed thereon.
4. The transparent display module of claim 3, wherein the insulating layer is an ink insulating layer.
5. The transparent display module of claim 1, wherein the conductive traces of the at least two layers of printed circuits are rounded at the trace intersections and/or bridging structures are provided at the trace intersections.
6. The transparent display module of claim 1, wherein the conductive circuit layer is provided with a metal coating at the position of the lamp bead.
7. The transparent display module of claim 1, wherein the metal plating is a copper plating, a nickel plating, or a chromium plating.
8. The transparent display module of claim 1, wherein the first and second light transmissive layers are glass, PI, PET, or PMMA.
9. The transparent display module of claim 1, wherein the interlayer is a thermoplastic film, and the thermoplastic film is a polyvinyl butyral film, an ethylene vinyl acetate film, or an ionic interlayer.
10. The transparent display module of claim 1, wherein the light beads are single color light beads, three color light beads, or four color light beads.
11. A manufacturing method of a transparent display module is characterized by comprising the following steps:
processing a transparent substrate to form a first light-transmitting layer and a second light-transmitting layer, wherein the transparent substrate is glass, PI, PET or PMMA; forming a conductive circuit layer between the first light-transmitting layer and the second light-transmitting layer by a multi-layer printing method, wherein the conductive circuit layer comprises at least two layers of printed circuits; forming an insulating layer on the at least two printed circuits; a plurality of lamp beads are arranged on the conductive circuit layer, and the at least two layers of printed circuits are electrically connected with the lamp beads; and a thermoplastic material film is arranged between the first light-transmitting layer and the second light-transmitting layer, and the first light-transmitting layer, the thermoplastic material film, the conducting circuit layer and the second light-transmitting layer are integrally formed into the transparent display module.
12. The method of manufacturing according to claim 11, wherein the method of multilayer printing comprises: and brushing a first layer of printed circuit on the second light-transmitting layer by using silver paste, forming a first ink insulating layer on the first layer of printed circuit by using a printing or spraying mode, brushing a second layer of printed circuit by using the silver paste, and forming a second ink insulating layer on the second layer of printed circuit.
13. The manufacturing method according to claim 11, further comprising forming a metal plating layer on the conductive circuit layer at a position where the bead is disposed.
14. The method of manufacturing of claim 11, wherein the first layer of printed circuitry and the second layer of printed circuitry are rounded at the connections and/or a bridging structure is provided where the lines meet.
15. A transparent display screen, comprising a plurality of transparent display modules according to any one of claims 1 to 10, wherein the plurality of transparent display modules are connected by a connecting structure to form the transparent display screen.
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| CN201910812671.0A CN110634414A (en) | 2019-08-30 | 2019-08-30 | Transparent display module and manufacturing method thereof |
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| CN201910812671.0A CN110634414A (en) | 2019-08-30 | 2019-08-30 | Transparent display module and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111768720A (en) * | 2020-07-19 | 2020-10-13 | 安徽优谱电子科技有限公司 | Flexible transparent LED full-color display screen, display module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111768720A (en) * | 2020-07-19 | 2020-10-13 | 安徽优谱电子科技有限公司 | Flexible transparent LED full-color display screen, display module and display device |
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