CN112863354B

CN112863354B - Display panel

Info

Publication number: CN112863354B
Application number: CN202110086818.XA
Authority: CN
Inventors: 祝翠林; 段艳强; 陈辉鹏; 蒋聪聪
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2022-05-31
Anticipated expiration: 2041-01-22
Also published as: CN112863354A

Abstract

The invention relates to a display panel, which is defined with a plane display area and an arc surface display area; the display panel includes: the first plane back plate is arranged in the plane display area; and the cambered surface back plate is arranged at two ends of the first plane back plate and is positioned in the cambered surface display area. Separately laminate the first plane backplate in plane display district and the cambered surface backplate in cambered surface display district, before flexible display screen, polaroid etc. laminated with the apron, laminate first plane backplate on the flexible display screen in plane display district earlier, cambered surface backplate is not laminated in cambered surface display district, avoids producing stress concentration in cambered surface display district, avoids producing the crackle, avoids display panel to appear black spot or dark line, promotes customer experience and feels. Flexible display screen, polaroid etc. and apron laminating back, reuse profile modeling tool laminates cambered surface backplate on the flexible display screen in cambered surface display area, reduces the laminating stress, avoids producing the crackle, avoids display panel to appear black spot or dark line, promotes customer experience and feels.

Description

Display panel

Technical Field

The application relates to the technical field of display, in particular to a display panel.

Background

Organic Light-Emitting display devices (also called Organic Light-Emitting diodes, abbreviated as OLEDs) are also called Organic electroluminescent display devices and Organic Light-Emitting semiconductors. The OLED has the advantages of low voltage requirement, high power saving efficiency, fast response, light weight, thin thickness, simple structure, low cost, wide viewing angle, almost infinite contrast, low power consumption, extremely high response speed, and the like, and has become one of the most important display technologies today.

In the modern communication industry, the demand for display devices such as mobile phones, televisions, flat panels, notebooks, digital cameras and the like is increasing. The screen occupation ratio is an important index of the display device, and the promotion of the screen occupation ratio can bring excellent visual experience and interaction effect to people, so that various display devices are developing to the full screen. In the manufacture of flexible full-screen display modules, the design of side curved displays is becoming the trend of the next generation. In the structural design of the existing curved surface product, in the development of a curved surface Cover plate (CG for short) attaching technology, the stress neutral layer of the panel is arranged on the line of the panel, so that the panel can generate stress concentration on the arc surface, and cracks are more easily generated in comparison with other positions, so that black spots or dark lines appear on the product RA, and the customer experience feeling is reduced.

Therefore, a new display panel is required to solve the above problems.

Disclosure of Invention

The invention aims to provide a display panel, which can solve the problems that the stress concentration at the cambered surface part exists in the jointing of a curved surface cover plate in the existing display panel, cracks are easy to generate, black spots or dark lines appear on a product RA, the experience of customers is reduced, and the like.

In order to solve the above problems, the present invention provides a display panel, which is defined with a flat display area and an arc display area; the display panel includes: the first plane back plate is arranged in the plane display area; and the cambered surface back plate is arranged at two ends of the first plane back plate and is positioned in the cambered surface display area.

Further, a gap is formed between the first plane back plate and the cambered surface back plate; the display panel further includes: the transparent adhesive tape is filled in the gap.

Further, the material of the transparent adhesive tape comprises: one or more of acrylic resin, butyl rubber, vinyl acetate resin, ethylene vinyl acetate resin, natural rubber, nitrile silicone resin, silicone rubber, and styrene block polymer.

Further, the display panel further comprises: the second plane back plate is arranged between the first plane back plate and the cambered surface back plate and is integrally formed with the cambered surface back plate; wherein the gap is located between the first planar backplane and the second planar backplane.

Further, the display panel further comprises: the flexible display screen is arranged in the plane display area and the cambered surface display area; the polaroid is arranged on the flexible display screen and arranged in the plane display area and the cambered surface display area; the cover plate covers the surface of one side of the polaroid, which is far away from the flexible display screen, and is arranged in the plane display area and the cambered surface display area; the optical adhesive is arranged between the polaroid and the cover plate; the first plane back plate and the cambered surface back plate are arranged on the surface of one side, away from the polaroid, of the flexible display screen.

Further, the cross section of the cover plate in the arc surface display area is arc-shaped, and the cross section of the arc surface backboard is arc-shaped and has the same radian as the arc surface of the cover plate in the arc surface display area.

Further, the first plane backboard and the cambered surface backboard are made of materials including: one or more of PET, PI and COP.

Further, the first plane back plate and the cambered surface back plate both comprise pressure-sensitive adhesive.

Further, the display panel further comprises: the heat dissipation layer is arranged on the surface of one side, far away from the flexible display screen, of the first plane backboard and extends to cover the surface of one side, far away from the flexible display screen, of the cambered surface backboard.

Furthermore, the heat dissipation layer comprises a rubber material, foam and a copper foil.

The invention has the advantages that: the invention relates to a display panel, wherein a first plane backboard of a plane display area and an arc backboard of an arc display area are separately attached, before a flexible display screen, a polaroid and the like are attached to a cover plate, the first plane backboard is attached to the flexible display screen of the plane display area, and the arc backboard is not attached to the flexible display screen of the arc display area, so that stress concentration in the arc display area is avoided, cracks are avoided, black spots or dark lines of the display panel are avoided, and the experience of customers is improved. Flexible display screen, polaroid etc. and apron laminating back, reuse profile modeling tool laminates cambered surface backplate on the flexible display screen in cambered surface display area, reduces the laminating stress, avoids producing the crackle, avoids display panel to appear black spot or dark line, promotes customer experience and feels. And moreover, the transparent adhesive tape is adopted to fill the gap between the first plane backboard and the cambered surface backboard, so that the gap boundary of the display surface is avoided after the display panel is assembled.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a display panel according to embodiment 1 of the present invention;

fig. 2 is a schematic view of a structure of a display panel cover plate before bonding in embodiment 1 of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 after being attached to a cover plate;

FIG. 4 is a schematic structural view of the structure of FIG. 3 after being attached to a cambered surface back plate;

FIG. 5 is a cross-sectional view of a shoe under cambered surface in accordance with embodiment 1 of the present invention;

FIG. 6 is a perspective view of the shoe sole in accordance with embodiment 1 of the present invention;

fig. 7 is a schematic structural view of a display panel according to embodiment 2 of the present invention;

FIG. 8 is a cross-sectional view of the cambered backplate and the second planar backplate according to embodiment 2 of the present invention;

fig. 9 is a perspective view of the cambered back plate and the second flat back plate in embodiment 2 of the invention.

Description of reference numerals:

100. display panel 101 and flat display area

102. Display area with cambered surface

1. Flexible display screen 2 and polaroid

3. Cover plate 4 and optical cement

5. First plane backboard 6 and cambered surface backboard

7. Gap 8, clear adhesive

9. Heat dissipation layer 10 and second planar back plate

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to make and use the present invention in a complete manner, and is provided for illustration of the technical disclosure of the present invention so that the technical disclosure of the present invention will be more clearly understood and appreciated by those skilled in the art how to implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as being limited to the embodiments set forth herein.

The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only directions in the drawings, and are used for explaining and explaining the present invention, but not for limiting the scope of the present invention.

In the drawings, elements that are structurally identical are represented by like reference numerals, and elements that are structurally or functionally similar in each instance are represented by like reference numerals. In addition, the size and thickness of each component shown in the drawings are arbitrarily illustrated for convenience of understanding and description, and the present invention is not limited to the size and thickness of each component.

Example 1

As shown in fig. 1, the present embodiment provides a display panel 100, which defines a flat display area 101 and an arc display area 102. In this embodiment, the display panel 100 defines two arc display areas 102 respectively located at two ends of the flat display area 101. In other embodiments, the display panel 100 may further define one, four, or more curved display areas 102, that is, the application does not limit the number of the curved display areas 102.

As shown in fig. 1 to 4, the display panel 100 includes: the flexible display screen comprises a flexible display screen 1, a polaroid 2, a cover plate 3, optical cement 4, a first plane backboard 5 and an arc backboard 6.

With reference to fig. 1, the flexible display screen 1 is disposed in the flat display area 101 and the arc display area 102. The flexible display screen 1 includes a thin film transistor, a first electrode, a light emitting layer, a second electrode, and an encapsulation layer, which are not described herein. The thin film transistor can be of a top gate structure or a bottom gate structure.

With reference to fig. 1, the polarizer 2 is disposed on the flexible display screen 1, and is disposed in the flat display area 101 and the arc display area 102. Wherein the polarizer 2 includes: a first TAC layer (triacetylcellulose), a PVA layer (polyvinyl alcohol), and a second TAC layer (triacetylcellulose). Wherein the PVA layer mainly plays a role of polarizing. Because the PVA layer is very easy to hydrolyze, set up first TAC layer in one side of PVA layer, set up second TAC layer in the opposite side of PVA layer, utilize high luminousness, the good and possess advantages such as mechanical strength of first TAC layer and second TAC layer, protection PVA layer prevents that the PVA layer from hydrolysising, promotes polaroid 2's physical characteristic.

With reference to fig. 1, the cover plate 3 covers the surface of the polarizer 2 on the side away from the flexible display screen 1, and is disposed in the flat display area 101 and the arc display area 102. The cover plate 3 is mainly used for protecting the display panel 100, the material of the cover plate 3 in this embodiment is resin, and in other embodiments, other materials may be used, and the material of the cover plate 3 is not limited in this application. Wherein the cross-sectional shape of the cover plate 3 of the arc display area 102 is arc.

With continued reference to fig. 1, an optical adhesive 4 is disposed between the polarizer 2 and the cover plate 3. The optical cement 4 is mainly used for attaching the polarizer 2 to the cover plate 3. The optical cement 4 (cement for optical part bonding) is a high molecular substance with optical performance similar to that of the optical part and excellent bonding performance. The optical Adhesive 4 comprises Optically Clear Adhesive (OCA). The material of the optical cement 4 comprises thermosetting OCA optical cement and/or ultraviolet curing OCA optical cement.

With continued reference to fig. 1, the first planar backplane 5 is disposed on a surface of the flexible display 1 on a side away from the polarizer 2 and in the planar display area 101. Wherein, the material of the first planar backplate 5 includes: one or more of PET (Polyethylene terephthalate, Chinese: polyester resin), PI (Polyimide, Chinese: Polyimide), and COP. Wherein the first planar backing sheet 5 further comprises a pressure sensitive adhesive. The pressure sensitive adhesive is mainly used for conveniently adhering the first plane back plate 5 to the flexible display screen 1.

With continued reference to fig. 1, 5, and 6, the cambered backplane 6 is disposed on a surface of the flexible display screen 1 on a side away from the polarizer 2. The arc backboard 6 is arranged at two ends of the first plane backboard 5 and is located in the arc display area 102. Wherein, the cambered surface backplate 6 material includes: one or more of PET, PI, and COP. Wherein the cambered back plate 6 further comprises a pressure sensitive adhesive. The pressure-sensitive adhesive is mainly used for conveniently adhering the cambered surface back plate 6 to the flexible display screen 1. The section of the arc backboard 6 is arc and has the same radian as the section of the cover plate 3 of the arc display area 102. Stress that produces when can reducing cambered surface backplate 6 laminating from this avoids producing the crackle, avoids display panel 100 to appear the shading or the dark line, promotes the customer and experiences and feel.

With continued reference to fig. 4, there is a gap 7 between the first planar backing plate 5 and the cambered backing plate 6.

With continued reference to fig. 1, the display panel 100 also includes a transparent adhesive 8. The transparent adhesive 8 is filled in the gap 7. After the display panel 100 is assembled, a gap boundary of the display surface is avoided, and the user experience is improved.

Wherein the material of transparent adhesive tape 8 includes: one or more of acrylic resin, butyl rubber, vinyl acetate resin, ethylene vinyl acetate resin, natural rubber, nitrile silicone resin, silicone rubber, and styrene block polymer.

With continued reference to fig. 1, the display panel 100 further includes a heat dissipation layer 9. The heat dissipation layer 9 is arranged on the surface of one side, far away from the flexible display screen 1, of the first plane backboard 5 and extends to cover the surface of one side, far away from the flexible display screen 1, of the cambered surface backboard 6. The heat dissipation layer 9 includes a rubber material, foam, and a copper foil. The adhesive material is mainly used for facilitating the adhesion of the heat dissipation layer 9 on the first plane backboard 5 and the cambered surface backboard 6; the foam mainly plays a role in buffering and is used for buffering stress; the copper foil plays roles of heat dissipation and shielding.

Combine fig. 1-fig. 4, this embodiment separately laminates first plane backplate 5 of plane display area 101 and cambered surface backplate 6 of cambered surface display area 102, flexible display screen 1, before polaroid 2 etc. and the laminating of apron 3, laminate first plane backplate 5 on flexible display screen 1 of plane display area 101 earlier, cambered surface backplate 6 that does not laminate on the flexible display screen of cambered surface display area 102, avoid producing stress concentration in cambered surface display area 102, and then avoid producing the crackle, avoid display panel 100 to appear dark spot or dark line, promote customer experience and feel. After the flexible display screen 1, the polaroid 2 and the like are attached to the cover plate 3, the cambered surface backboard 6 is attached to the flexible display screen 1 of the cambered surface display area 102 by using the copying jig, the attaching stress is reduced, cracks are avoided, the display panel 100 is prevented from generating black spots or dark lines, and the customer experience is improved.

Example 2

As shown in fig. 7 to 9, embodiment 2 includes most of the technical features of embodiment 1, and embodiment 2 differs from embodiment 1 in that: the display panel 100 in embodiment 2 further includes: the second plane back plate 10 is arranged between the first plane back plate 5 and the cambered surface back plate 6 and is integrally formed with the cambered surface back plate 6; wherein the gap 7 is located between the first planar backplate 5 and the second planar backplate 10.

Embodiment 2 separately laminates first planar back plate 5 of planar display area 101 and cambered surface backplate 6 of cambered surface display area 102, flexible display screen 1, before polaroid 2 etc. and the laminating of apron 3, laminate first planar back plate 5 on flexible display screen 1 of planar display area 101 earlier, cambered surface backplate 6 that does not laminate on the flexible display screen of cambered surface display area 102, avoid producing stress concentration in cambered surface display area 102, and then avoid producing the crackle, avoid display panel 100 to appear black spot or dark line, promote customer experience and feel. After the flexible display screen 1, the polaroid 2 and the like are attached to the cover plate 3, the cambered surface backboard 6 is attached to the flexible display screen 1 of the cambered surface display area 102 by using the copying jig, the attaching stress is reduced, cracks are avoided, the display panel 100 is prevented from generating black spots or dark lines, and the customer experience is improved.

The foregoing detailed description is directed to a display panel provided by the present application, and the principles and embodiments of the present application are described herein using specific examples, which are merely used to help understand the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A display panel is characterized in that a plane display area and an arc surface display area are defined;

the display panel includes:

the first plane back plate is arranged in the plane display area; and

the cambered surface back plates are arranged at two ends of the first plane back plate and are positioned in the cambered surface display area;

the second plane back plate is arranged between the first plane back plate and the cambered surface back plate and is integrally formed with the cambered surface back plate;

a gap is formed between the first planar back plate and the cambered surface back plate, and the gap is positioned between the first planar back plate and the second planar back plate;

the display panel further includes: the transparent adhesive tape is filled in the gap.

2. The display panel of claim 1, wherein the transparent adhesive comprises: one or more of acrylic resin, butyl rubber, vinyl acetate resin, ethylene vinyl acetate resin, natural rubber, nitrile silicone resin, silicone rubber, and styrene block polymer.

3. The display panel according to claim 1, characterized in that the display panel further comprises:

the flexible display screen is arranged in the plane display area and the cambered surface display area;

the polaroid is arranged on the flexible display screen and arranged in the plane display area and the cambered surface display area;

the cover plate covers the surface of one side of the polaroid, which is far away from the flexible display screen, and is arranged in the plane display area and the cambered surface display area; and

the optical adhesive is arranged between the polaroid and the cover plate;

the first plane back plate and the cambered surface back plate are arranged on the surface of one side, away from the polaroid, of the flexible display screen.

4. The display panel according to claim 1, wherein the cross-sectional shape of the cover plate of the arc display area is arc, and the cross-sectional shape of the arc backplane is arc and has the same radian as the cross-sectional shape of the cover plate of the arc display area.

5. The display panel of claim 1, wherein the first planar backplane and the cambered backplane are made of materials comprising: one or more of PET, PI, and COP.

6. The display panel of claim 1, wherein the first planar backplane and the cambered backplane each comprise a pressure sensitive adhesive.

7. The display panel according to claim 3, characterized in that the display panel further comprises:

and the heat dissipation layer is arranged on the surface of one side, far away from the flexible display screen, of the first plane backboard and extends to cover the surface of one side, far away from the flexible display screen, of the cambered surface backboard.

8. The display panel of claim 7, wherein the heat dissipation layer comprises glue, foam, and copper foil.