CN118430390A - Spliced display unit, spliced display screen and electronic equipment - Google Patents

Abstract

The embodiment of the application provides a spliced display unit, a spliced display screen and electronic equipment, and relates to the technical field of display. In the spliced display unit, a peripheral circuit positioned in a non-display area is connected with a circuit in the display area through a wiring structure, a blocking layer of the display area, which is close to the non-display area, is not in contact with a flexible substrate, when the spliced display unit is adopted to splice a spliced display screen, the flexible substrate of the display area, which is close to the non-display area, can be bent relative to the direction away from the blocking layer, so that the bending radius of the flexible substrate can be increased, the length of the flexible substrate, which is bent, relative to the extending part of the display area is reduced, and therefore, the width of a gap area, which cannot be displayed, is formed at the splicing position when a plurality of spliced display units are spliced, and the overall display effect of the spliced display screen is improved.

Description

Spliced display unit, spliced display screen and electronic equipment

Technical Field

The present application relates to the field of display technology, and in particular to a spliced display unit, a spliced display screen and an electronic device.

Background technique

Large-size display technology is becoming more and more popular in the market. However, due to the limitations of display manufacturing, the largest single display screen cannot meet the needs of large-size display alone. The current large-size display is realized by splicing multiple splicing display units together to form a spliced display screen. The non-display area outside the splicing display unit is distributed with peripheral circuits, such as peripheral drive circuits (GIP circuits or Demax circuits, etc.) and peripheral protection circuits (ESD circuits), etc. This will cause multiple splicing display units to form a spliced display screen. There will be an undisplayable area at the splicing position, affecting the overall display effect of the spliced display screen.

Summary of the invention

In order to overcome the technical problems mentioned in the above technical background, the embodiments of the present application provide a spliced display unit, a spliced display screen and an electronic device.

According to a first aspect of the present application, a spliced display unit is provided, wherein the spliced display unit has a display area and a non-display area at least partially surrounding the display area;

The spliced display unit includes a flexible substrate;

In the non-display area, the spliced display unit further includes a peripheral circuit located on the flexible substrate;

In the display area, the spliced display unit further includes a barrier layer, an array driving layer and a pixel device layer sequentially stacked on the flexible substrate, and the barrier layer is not in contact with the flexible substrate at a position of the display area close to the non-display area;

The spliced display unit further includes a wiring structure, which connects the peripheral circuit with the circuit in the array driving layer.

The above-mentioned spliced display unit connects the peripheral circuit located in the non-display area and the circuit in the display area through a routing structure, and makes the barrier layer of the display area close to the non-display area not contact with the flexible substrate. When the spliced display units are used to splice into a spliced display screen, the flexible substrate of the display area close to the non-display area can be bent relative to the direction away from the barrier layer, which can increase the bending radius of the flexible substrate and reduce the length of the part of the flexible substrate protruding relative to the display area after bending, thereby reducing the width of the gap area that cannot be displayed at the splicing position when multiple spliced display units are spliced, thereby improving the overall display effect of the spliced display screen.

In a possible embodiment of the present application, the spliced display unit further includes a release layer;

The release layer is located between the flexible substrate and the barrier layer, and the release layer is located at a position of the display area close to the non-display area. The release layer is used to isolate the barrier layer located at a position of the display area close to the non-display area from the flexible substrate.

In a possible embodiment of the present application, a side edge of the release layer close to the non-display area is flush with a side edge of the barrier layer close to the non-display area.

In a possible embodiment of the present application, the routing structure includes a first conductive routing and a second conductive routing;

The first conductive trace is located on the flexible substrate, and the first conductive trace is connected to the peripheral circuit;

The second conductive trace is located on a side of the barrier layer away from the flexible substrate, and the second conductive trace is connected to a circuit in the array driving layer;

The second conductive trace is connected to the first conductive trace through a film layer via hole on the barrier layer.

In a possible embodiment of the present application, the first conductive trace extends from the non-display area toward the display area;

The orthographic projection of the membrane layer via hole on the barrier layer on the flexible substrate is located on a side of the orthographic projection of the release layer on the flexible substrate away from the non-display area.

In a possible embodiment of the present application, the wiring structure is made of metal molybdenum or metal titanium;

And/or, the release layer is made of a material having an etching ratio greater than a preset etching ratio;

And/or, the release layer is made of metal or metal oxide.

In a second aspect of the present application, a spliced display screen is provided, wherein the spliced display screen comprises a spliced display unit in any possible embodiment of the first aspect;

At the splicing position of the adjacent splicing display units, the flexible substrate of the splicing display unit is bent toward the barrier layer away from the splicing display unit.

In a possible embodiment of the present application, the spliced display screen further includes protective glue;

The protective glue is filled in the area where the flexible substrate is bent relative to the barrier layer, and is used to support and protect the bent portion of the flexible substrate;

Preferably, the spliced display screen further comprises a cover layer, and the cover layer is located at the light emitting side of the spliced display unit.

In a possible embodiment of the present application, an orthographic projection of the bent portion of the flexible substrate on the plane where the barrier layer is located is located inside the barrier layer.

According to a third aspect of the present application, an electronic device is provided, wherein the electronic device comprises a spliced display screen in any possible embodiment of the second aspect.

The spliced display unit, spliced display screen and electronic device provided by the embodiments of the present application, the spliced display unit connects the peripheral circuit located in the non-display area and the circuit in the display area through a routing structure, and makes the barrier layer of the display area close to the non-display area not contact with the flexible substrate. When the spliced display units are used to splice into a spliced display screen, the flexible substrate of the display area close to the non-display area can be bent relative to the direction away from the barrier layer, which can increase the bending radius of the flexible substrate and reduce the length of the part of the flexible substrate protruding relative to the display area after bending, thereby reducing the width of the gap area that cannot be displayed at the splicing position when multiple spliced display units are spliced, thereby improving the overall display effect of the spliced display screen.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG. 1 illustrates a schematic diagram of the states of a spliced display unit before and after bending in the prior art;

FIG. 2 illustrates an area distribution diagram of spliced display units provided in this embodiment;

FIG3 illustrates one of the state change diagrams of the spliced display unit before and after bending provided by this embodiment;

FIG4 illustrates a second state change diagram of the spliced display unit before and after bending provided by this embodiment;

FIG5 illustrates a schematic structural diagram of a spliced display screen provided in this embodiment;

FIG6 illustrates a schematic cross-sectional view taken along the AA direction in FIG5 ;

FIG. 7 illustrates a schematic flow chart of a method for manufacturing a spliced display unit provided in this embodiment;

FIG. 8 illustrates a process flow chart corresponding to FIG. 7 .

Icon: 1-spliced display screen; 10-spliced display unit; 10A-display area; 10B-non-display area; 110-flexible substrate; 120-barrier layer; 130-array drive layer; 140-pixel device layer; 150-wiring structure; 1501-first wiring structure; 1502-second wiring structure; 160-release layer; 200-peripheral circuit; 20-protective glue; 30-cover layer.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

In the description of this application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

It should be noted that, in the absence of conflict, different features in the embodiments of the present application may be combined with each other.

In order to solve the technical problems mentioned in the background technology, please refer to Figure 1. The prior art can adopt a method of bending the non-display area 10B of the distributed peripheral circuit 200 to reduce the width of the gap area that cannot be displayed. As shown in the figure, relative to the non-display area 10B before bending, the above method can further reduce the non-display area of the single spliced display unit 10 from the width a1 to the width a2. However, the reduced width a2 is generally still around 2 mm, which still affects the display effect of the spliced display screen.

In order to solve the above problems, the inventor innovatively designed the following technical solution, and the specific implementation scheme of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that the defects existing in the above solutions in the prior art are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above technical problems and the solutions proposed in this embodiment below for the above problems should all be the contributions made by the inventor to the present application in the process of invention and creation, and should not be understood as the technical content known to those skilled in the art.

Please refer to Figures 2 and 3, Figure 2 illustrates a regional distribution diagram of the spliced display unit provided in this embodiment, and Figure 3 illustrates one of the state change diagrams of the spliced display unit before and after bending in Figure 2. In this embodiment, the spliced display unit 10 has a display area 10A and a non-display area 10B, wherein the non-display area 10B at least partially surrounds the display area 10A, and the spliced display unit 10 includes a flexible substrate 110.

In the non-display area 10B, the spliced display unit 10 further includes a peripheral circuit 200 located on the flexible substrate 110. In the display area 10A, the spliced display unit 10 further includes a barrier layer 120, an array driving layer 130 and a pixel device layer 140 sequentially stacked on the flexible substrate 110. At a position of the display area 10A close to the non-display area 10B, the barrier layer 120 is not in contact with the flexible substrate 110.

In this embodiment, the spliced display unit 10 further includes a wiring structure 150 , which connects the peripheral circuit 200 with the circuits of the array driving layer 130 and/or the pixel device layer 140 .

In the above structure, the peripheral circuit 200 located in the non-display area 10B and the circuit in the display area 10A are connected through the routing structure 150, and the barrier layer 120 of the display area 10A close to the non-display area 10B is not in contact with the flexible substrate 110. When the spliced display units 10 are spliced into a spliced display screen, the flexible substrate 110 of the display area 10A close to the non-display area 10B can be bent relative to the direction away from the barrier layer 120, which can increase the bending radius of the flexible substrate 110 and reduce the length of the portion of the flexible substrate 110 protruding relative to the display area 10A after bending, thereby reducing the width of the gap area that cannot be displayed at the splicing position when multiple spliced display units 10 are spliced, thereby improving the overall display effect of the spliced display screen.

Please refer to FIG. 4 . Further, the spliced display unit 10 further includes a release layer 160, which is located between the flexible substrate 110 and the barrier layer 120. Specifically, the release layer 160 is located at a position of the display area 10A close to the non-display area 10B. The release layer 160 is used to separate the barrier layer 120 located at a position of the display area 10A close to the non-display area 10B from the flexible substrate 110, so that when the flexible substrate 110 is bent, the flexible substrate 110 located at a position of the display area 10A close to the non-display area 10B can be bent relative to a direction away from the barrier layer 120. With such a design, the bending radius of the flexible substrate 110 can be increased, so that the bent portion of the flexible substrate 110 can extend toward the display area 10A, and the length of the portion of the flexible substrate 110 extending relative to the display area 10A after being bent can be reduced.

For example, in this embodiment, the side edge of the release layer 160 close to the non-display area 10B is flush with the side edge of the barrier layer 120 close to the non-display area 10B.

Further, please refer to FIG. 3 and FIG. 4 again, the wiring structure 150 includes a first conductive wiring 1501 and a second conductive wiring 1502. The first conductive wiring 1501 is located on the flexible substrate 110, and the first conductive wiring 110 is connected to the peripheral circuit 220. The second conductive wiring 1502 is located on the side of the barrier layer 120 away from the flexible substrate 110, and the second conductive wiring 1502 is connected to the circuit in the array driving layer 130. The second conductive wiring 1502 is connected to the first conductive wiring 1501 through the film layer via on the barrier layer 120.

For example, the flexible substrate 110 is prevented from damaging the wiring structure 150 when it is bent, thereby affecting the electrical connection between the peripheral circuit 200 and the circuit in the display area 10A. In this embodiment, the first conductive wiring 1501 extends from the non-display area 10B toward the display area 10B, and the orthographic projection of the film layer via on the barrier layer 120 on the flexible substrate 110 is located on the side of the orthographic projection of the release layer 160 on the flexible substrate 110 away from the non-display area 10B. With such a design, the flexible substrate 110 located in the display area 10A can be prevented from pulling the first conductive wiring 1501 and the second conductive wiring 1502 when it is bent, thereby affecting the stability of the wiring structure 150.

Furthermore, the routing structure 150 may be made of metal molybdenum or metal titanium, and the release layer 120 may be made of a material with a relatively large etching ratio, such as a material with an etching ratio greater than a preset etching ratio. Preferably, the release layer 120 may be made of a metal or a metal oxide, such as metal aluminum or aluminum oxide. In this embodiment, the spliced display unit 10 may include a release layer 160, or may not include the release layer 160. When the release layer 160 is not included, there is a film layer gap in the barrier layer 120 located at the position of the display area 10A close to the non-display area 10B, and the film layer gap separates the barrier layer 120 and the flexible substrate 110. It can be understood that the spliced display unit 10 in FIG. 3 can be obtained by removing the release layer 160 from the spliced display unit 10 in FIG. 4. For example, the release layer 160 can be removed by etching the release layer 160 with an etching solution.

In this embodiment, the flexible substrate 110 can be made of polyimide (PI), and the thickness of the flexible substrate can be between 8um and 15um. The barrier layer 120 has an insulating function. For example, the barrier layer 120 can be a silicon oxide layer or a silicon nitride layer, and the thickness of the barrier layer 120 can be between 5000 angstroms and 7000 angstroms.

In this embodiment, the spliced display unit 10 may also include a flexible printed circuit (FPC), which includes a driving display chip for driving the spliced display unit 10 to display. The flexible printed circuit is bound to the peripheral circuit 200, and the circuit in the display area 10A is driven by the peripheral circuit 200 to enable the spliced display unit 10 to display normally.

5 and 6, this embodiment further provides a spliced display screen, and the spliced display screen 1 can be formed by splicing a plurality of spliced display units 10 described above. For example, as shown in FIG5, the spliced display screen 1 can be formed by splicing four spliced display units 10. As shown in FIG6, at the splicing position of adjacent spliced display units 10, the flexible substrate 110 of the spliced display unit is bent toward the barrier layer 120 away from the spliced display unit.

Please refer to FIG. 6 again. The spliced display screen 1 further includes a protective adhesive 20 . The protective adhesive 20 is filled in the area where the flexible substrate 110 is bent relative to the barrier layer 120 , so as to support and protect the bent portion of the flexible substrate 110 .

Furthermore, the spliced display screen 1 may further include a cover layer 30 , and the cover layer 30 is located on the light emitting side of the spliced display unit 10 .

In this embodiment, the orthographic projection of the bent portion of the flexible substrate 110 on the plane where the barrier layer 120 is located is located inside the barrier layer 120. Such a design can prevent the bent portion of the flexible substrate 110 from extending relative to the display area 10A. In this case, the gap width a3 in the splicing position area can be less than 0.1 mm, so that the influence of the non-display area at the splicing position on the overall display effect of the spliced display screen can be ignored, thereby improving the display effect of large-size displays.

This embodiment also provides an electronic device, which includes the spliced display screen described in the previous embodiment. The electronic device using the spliced display screen has a good large-size display effect, which can increase the market competitiveness of the electronic device.

The present embodiment further provides a method for manufacturing a spliced display unit. Please refer to Figures 7 and 8. Figure 7 illustrates a schematic flow chart of the method for manufacturing a spliced display unit. Figure 8 illustrates a process flow chart corresponding to Figure 7. The spliced display unit 10 includes a display area 10A and a non-display area 10B. The method for manufacturing the spliced display unit is described in detail below in conjunction with Figures 7 and 8.

Step S11, manufacturing a flexible substrate.

In this embodiment, the flexible substrate 110 may be manufactured on a glass substrate, and the flexible substrate 110 is distributed in the display area 10A and the non-display area 10B.

Step S12, prefabricate a wiring structure for connecting the peripheral circuit and the circuit in the display area.

In this embodiment, the wiring structure 150 may include a conductive wiring 1501 and a second conductive wiring 1502 , and step S12 may be implemented in the following manner.

First, a first conductive trace 1501 extending from the non-display area 10B to the display area 10A is fabricated on the flexible substrate 110 .

Next, a release layer 160 is formed on the flexible substrate 110 at a position of the display area 10A close to the non-display area 10B, and the release layer 160 covers a portion of the first conductive trace 1501, wherein the first conductive trace 1501 extends to a side of the release layer 160 away from the non-display area 10B.

Then, the barrier layer 120 is formed on the flexible substrate 110 and the release layer 160 .

Finally, a second conductive trace 1502 is fabricated on the barrier layer 120 away from the flexible substrate 110 , and is connected to the first conductive trace 1501 through a film layer via of the barrier layer 120 , thereby forming a trace structure 150 .

Step S13, manufacturing an array driving layer and a pixel device layer stacked in sequence in the display area, and manufacturing a peripheral circuit in the non-display area.

The second conductive trace 1502 is connected to the circuit in the array driving layer 130 , and the first conductive trace 1501 is connected to the peripheral circuit 20 .

In this embodiment, the film layer between the peripheral circuit 200 and the display area 10A (for example, the gate insulation layer, interlayer insulation layer and planarization layer used to make the array driving layer 130) is also etched away in this step to facilitate the subsequent bending of the non-display area 10B relative to the display area 10A.

In this embodiment, the pixel device layer 140 can be formed by Micro LED. In this step, the Micro LED can be transferred to the array driving layer 130 by mass transfer to obtain the pixel device layer 140. After obtaining the pixel device layer 140, the Micro LED can be encapsulated and protected by coating a protective adhesive layer and a curing adhesive layer.

After completing the above operations, the glass substrate can be removed to obtain the spliced display unit 10 .

It can be understood that, in this embodiment, the release layer 160 in the spliced display unit 10 may be removed or not. When the release layer 160 needs to be removed, the release layer 160 may be removed by etching.

In summary, the spliced display unit, spliced display screen and electronic device provided by the embodiments of the present application, the above-mentioned spliced display unit connects the peripheral circuit located in the non-display area and the circuit in the display area through a routing structure, and makes the barrier layer of the display area close to the non-display area not contact with the flexible substrate. When the spliced display units are used to splice into a spliced display screen, the flexible substrate of the display area close to the non-display area can be bent relative to the direction away from the barrier layer, which can increase the bending radius of the flexible substrate and reduce the length of the part of the flexible substrate protruding relative to the display area after bending, thereby reducing the width of the gap area that cannot be displayed at the splicing position when multiple spliced display units are spliced, thereby improving the overall display effect of the spliced display screen.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A spliced display unit, characterized in that the spliced display unit has a display area and a non-display area at least partially surrounding the display area; The spliced display unit includes a flexible substrate; In the non-display area, the spliced display unit further includes a peripheral circuit located on the flexible substrate; In the display area, the spliced display unit further includes a barrier layer, an array driving layer and a pixel device layer sequentially stacked on the flexible substrate, and the barrier layer is not in contact with the flexible substrate at a position of the display area close to the non-display area; The spliced display unit further includes a wiring structure, which connects the peripheral circuit with the circuit in the array driving layer. 2. The spliced display unit according to claim 1, characterized in that the spliced display unit further comprises a release layer; The release layer is located between the flexible substrate and the barrier layer, and the release layer is located at a position of the display area close to the non-display area. The release layer is used to isolate the barrier layer located at a position of the display area close to the non-display area from the flexible substrate. 3 . The spliced display unit according to claim 2 , wherein a side edge of the release layer close to the non-display area is flush with a side edge of the barrier layer close to the non-display area. 4. The spliced display unit according to claim 2, wherein the wiring structure comprises a first conductive wiring and a second conductive wiring; The first conductive trace is located on the flexible substrate, and the first conductive trace is connected to the peripheral circuit; The second conductive trace is located on a side of the barrier layer away from the flexible substrate, and the second conductive trace is connected to a circuit in the array driving layer; The second conductive trace is connected to the first conductive trace through a film layer via hole on the barrier layer. 5. The spliced display unit according to claim 4, wherein the first conductive trace extends from the non-display area toward the display area; The orthographic projection of the membrane layer via hole on the barrier layer on the flexible substrate is located on a side of the orthographic projection of the release layer on the flexible substrate away from the non-display area. 6. The spliced display unit according to any one of claims 2 to 5, characterized in that the wiring structure is made of metal molybdenum or metal titanium; And/or, the release layer is made of a material having an etching ratio greater than a preset etching ratio; And/or, the release layer is made of metal or metal oxide. 7. A spliced display screen, characterized in that the spliced display screen comprises the spliced display unit according to any one of claims 1 to 6; At the splicing position of the adjacent splicing display units, the flexible substrate of the splicing display unit is bent toward the barrier layer away from the splicing display unit. 8. The spliced display screen according to claim 7, characterized in that the spliced display screen further comprises a protective glue; The protective glue is filled in the area where the flexible substrate is bent relative to the barrier layer, and is used to support and protect the bent portion of the flexible substrate; Preferably, the spliced display screen further comprises a cover layer, and the cover layer is located at the light emitting side of the spliced display unit. 9 . The spliced display screen according to claim 7 , wherein an orthographic projection of the bent portion of the flexible substrate on the plane where the barrier layer is located is located inside the barrier layer. 10. An electronic device, characterized in that the electronic device comprises the spliced display screen according to any one of claims 7 to 9.