CN112086495B - Display device - Google Patents
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- CN112086495B CN112086495B CN202010966549.1A CN202010966549A CN112086495B CN 112086495 B CN112086495 B CN 112086495B CN 202010966549 A CN202010966549 A CN 202010966549A CN 112086495 B CN112086495 B CN 112086495B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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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
- G09F9/301—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 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The application discloses a display device, which comprises a flexible circuit board, a flexible display panel, a chip on film and a filling gasket, wherein the flexible display panel comprises a plane area, a bending area and a binding area, and the bending area is positioned between the plane area and the binding area; the chip on film is respectively bound with the flexible circuit board and the flexible display panel in the binding area; the filling gasket is arranged in an area defined by the flexible circuit board, the flexible display panel and the chip on film. The filling gasket can keep good bending track and bending form of the four-curved-surface screen terminal bending process, and is beneficial to reducing multidirectional complex stress caused by a three-dimensional bending area, so that the yield of the display device is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
With the change of aesthetic levels of people and the development of mobile terminal products, people gradually pursue the appearance of mobile phone terminals with rounded curves, and numerous curved-surface screen terminals, such as samsung S9 (low-curvature screen), Vivo nex3, hua Mate 30 (large-curvature waterfall screen), and the like, also appear in the market, and the mobile phone terminals are all curved surfaces with two sides, i.e. double-surface curves. The research of the double-faced curved screen technology is gradually perfected, the four-faced curved screen gradually draws the attention of the market due to the advantages of more beautiful arcs, differentiated appearances and the like, and the four-faced curved screen is one of the inevitable trends of the development of mobile phone terminals.
The bottom of the flexible OLED display panel is provided with a dense wiring area and a binding area which are called as a terminal area or an external wiring area. The process of bending the terminal areas to the back of the flexible panel is referred to as a terminal bending process. The non-curved screen and the left and right double curved screens have the advantages that the terminal bending area at the lower boundary does not enter the bending area, the terminal area at the lower boundary is parallel to the non-terminal area after the terminal of the display panel is bent, the stress state is single, only the line changing design of signal wiring and the filling of organic light resistance need to be carried out in the panel bending area, and the process is mature. However, the terminal bending area at the lower boundary of the upper, lower, left and right curved screens can enter the bending area, the terminal bending form is completely different from that of a non-curved screen and the left and right curved screens, and the terminal bending design in the prior art cannot meet the technology of the upper, lower, left and right curved screens.
Therefore, the prior art has defects and needs to be improved urgently.
Disclosure of Invention
An object of the application is to provide a display device to solve the problem that the terminal bending design can not satisfy the technology of four curved surface screens about from top to bottom among the prior art, thereby improve the display panel yield.
In order to solve the above problems, the present application provides a display device, including a flexible circuit board, a flexible display panel, and a cover plate, where the flexible display panel includes a plane area, a bending area, and a binding area, and the bending area is located between the plane area and the binding area; a chip on film is respectively bound with the flexible circuit board and the flexible display panel in the binding area; wherein the cover plate covers the plane area and the bending area of the flexible display panel; and at least one filling gasket is arranged in an area defined by the flexible circuit board, the flexible display panel and the chip on film together so as to support the flexible circuit board and the chip on film and attach the plane area and the bending area of the flexible display panel to the cover plate.
In some embodiments, the filler pad comprises a first planar surface, a curved surface, and a second planar surface; wherein the second plane is parallel to the first plane; the curved surface is located between the first plane and the second plane and is matched with the bending area of the flexible display panel.
In some embodiments, the filling shim is provided with a chamfer at the junction of any two adjacent faces.
In some embodiments, the width of the first plane of the fill pad is greater than the width of the flexible display panel planar area.
In some embodiments, the material of the filler pad is at least one of silicone, rubber, and epoxy resin.
In some embodiments, the display device further includes a first backplane disposed on the second plane of the filling pad, and the bonding area of the flexible display panel is disposed on the first backplane, so that the flip-chip film is bonded to the bonding area of the flexible display panel and the flexible circuit board on the first backplane respectively.
In some embodiments, the display device further includes a second back plate disposed between the filling pad and the flexible display panel and contacting the flexible display panel in the planar area and the bending area.
In some embodiments, the flexible display panel includes a display panel and a polarizer; the display panel is in contact with the second back plate; the polaroid is arranged on one side, far away from the second back plate, of the display panel and is in contact with the display panel in the plane area and the bending area.
In some embodiments, the display device further includes a heat dissipation composite layer disposed on a side of the flexible display panel close to the filling pad, extending from the planar region to the bending region, and connected to the flexible circuit board through a double-sided conductive adhesive.
In some embodiments, the display device further includes a protective glue layer disposed in the bonding region and covering the bonding terminals of the chip on film and the flexible display panel.
In the display device, the filling gasket coated in the flexible circuit board, the flexible display panel and the flip chip film has the same bending radian with the cover plate so as to ensure complete bonding without bubbles during bonding; the filling gasket is irregular in shape and thicker than the filling gasket used in the terminal area of the non-curved screen and the left and right double-curved screens, so that the material of the filling gasket is at least one of silica gel, rubber and epoxy resin; the utility model discloses a flexible display panel, including packing gasket, flexible display panel, packing gasket's first planar length should be than buckling back flexible display panel is long, and this application is preferred packing gasket first planar width is greater than flexible display panel the width in plane district, in order to guarantee flexible display panel the plane district with buckle the district relatively stable, difficult emergence is out of shape.
In addition, the display device further comprises a heat dissipation composite layer, wherein the heat dissipation composite layer is arranged on one side, close to the filling gasket, of the flexible display panel, extends from the plane area to the bending area, and is connected with the flexible circuit board through double-sided conductive adhesive, and the heat dissipation composite layer can effectively improve the heating problem of the display device during working; the display device further comprises a protective glue layer, wherein the protective glue layer is arranged in the binding region, covers the chip on film and the binding terminal of the flexible display panel, and can protect the binding terminal exposed in the binding region from being corroded by the external environment.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram illustrating a positional relationship between a cover plate and a filling pad of a display device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
Specifically, please refer to fig. 1, in which fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. The present application provides a display device 10, which includes a flexible circuit board 100, a flexible display panel 200 and a cover plate 800; the flexible display panel 200 includes a planar area 201, a bending area 202 and a binding area 203, wherein the bending area 201 is located between the planar area 202 and the binding area 203, and a flip chip 300 is bound with the flexible circuit board 100 and the flexible display panel 200 in the binding area 203 respectively; wherein the cover plate 800 covers the flat area 201 and the bending area 202 of the flexible display panel 200; at least one filling pad 400 is disposed in an area defined by the flexible circuit board 100, the flexible display panel 200, and the flip-chip film 300, so as to support the flexible circuit board 100 and the flip-chip film 300, and attach the planar area 201 and the bending area 202 of the flexible display panel 200 to the cover plate 800.
In the present application, the gasket 400 includes a first plane 410, a curved surface 420 and a second plane 430; wherein the second plane 430 is parallel to the first plane 410; the curved surface 420 is located between the first plane 410 and the second plane 430 and cooperates with the bending region 202 of the flexible display panel 200, so that the first plane 410 and the curved surface 420 of the gasket 400 support the planar region 201 and the bending region 202 of the flexible display panel 200 to be attached to the cover plate 800.
In the embodiment of the present application, the gasket 400 includes a first plane 410, a curved surface 420, a second plane 430, and a slant surface 440, wherein the second plane 430 is parallel to the first plane 410; the included angle between the inclined surface 440 and the first plane 410 is less than 30 °; the curved surface 420 is located between the first plane 410 and the second plane 430, and is matched with the bending region 202 of the flexible display panel 200, so that the first plane 410 and the curved surface 420 of the gasket 400 support the plane region 201 and the bending region 202 of the flexible display panel 200 to be attached to the cover plate 800.
It can be understood by those skilled in the art that the gasket 400 includes a first plane 410, a curved surface 420, a second plane 430 and an inclined surface 440, which total 4 planes, but it does not mean that the gasket 400 only includes these 4 planes, and the gasket 400 further includes two side surfaces, which are not limited in the present application as long as the requirements of the present application can be met.
The display device 10 further includes a first backplane 310, the first backplane 310 is disposed on the second plane 430 of the filling pad 400, and the bonding area 201 of the flexible display panel 200 is disposed on the first backplane 310, so that the flip chip 300 is bonded to the bonding area 201 of the flexible display panel 200 and the flexible circuit board 100 on the first backplane 310, respectively. It can be understood by those skilled in the art that the chip on film 300 is a chip on film with a conventional structure, and the method for bonding the chip on film 300 with the flexible circuit board 100 and the flexible display panel 200 is also a conventional method in the art, and is not described in detail herein.
In this application, the display device 10 further includes a second back plate 210, wherein the second back plate 210 is disposed between the filling pad 400 and the flexible display panel 200 and contacts the flexible display panel 200 in the plane area 201 and the bending area 202. The flexible display panel includes a display panel 220 and a polarizer 230; the display panel 220 is in contact with the second backplane 210; the polarizer 230 is disposed on a side of the display panel 220 away from the second back plate 210, and contacts the display panel 220 in the planar area 201 and the bending area 202. The second back plate 210 is a substrate commonly used in the art, and may be a glass substrate, a polyimide substrate or a film substrate (film substrate); the display panel and the polarizer are common structures in the field, and are not described in detail in the application.
In this application, the display device 10 further includes a heat dissipation composite layer 500, wherein the heat dissipation composite layer 500 is disposed on one side of the flexible display panel 200, extends from the planar region 201 to the bending region 202, and is connected to the flexible circuit board 100 through a double-sided conductive adhesive 600. It should be noted that the heat dissipation composite layer completely covers the curved surface 440 of the filling gasket 400, and may also extend to the bonding region 203 of the flexible display panel 200, which is not limited to the description of fig. 1.
In this application, the display device 10 further includes a protection glue layer 700, the protection glue layer 700 covers the flip chip 300 and the binding terminal of the flexible display panel 200, because the binding terminal is usually made of metal, the protection glue layer 700 is covered to protect the binding terminal exposed in the binding region 203 from being corroded by the external environment.
In this application, the cover plate 800 is disposed on a side of the flexible display panel 200 away from the flexible circuit board 100, covers the planar area 201 and the bending area 202 of the flexible display panel 200, and is connected to the flexible display panel 200 through the transparent optical adhesive 900.
In the embodiment of the present application, a chamfer is provided at a joint of any two adjacent surfaces of the filling gasket 400, and the size of the chamfer only needs to satisfy the requirements of the present application, for example, the chamfer at the joint of the first plane 410 and the inclined plane 420 needs to satisfy that the flexible circuit board 100 does not have an obvious vertical bending, which is defined as an obvious linear crease; the chamfer at the junction of the inclined surface 440 and the first plane 410 is required to meet the requirement that the flexible circuit board 100 is not bent vertically; a junction between the first plane 410 and the curved surface 420 may not be provided with a chamfer, but it needs to be satisfied that the outer contours of the first plane 410 and the curved surface 420 are consistent with the bending angle of the flexible display panel 200, that is, consistent with the design curvature of the display device 10; the chamfer at the joint of the curved surface 420 and the second plane 430 is required to meet the requirement that the flexible display panel 200 is not bent vertically significantly at this position.
In the embodiment of the present application, the second plane 430 of the filling pad 400 is parallel to the first plane 410, so that the flip-chip film 300 is relatively parallel to the flexible display panel 200, which is more beneficial to the bonding between the flip-chip film 300 and the flexible display panel 200, and the stability of the structure of the flip-chip film 300 can be ensured by horizontally arranging the flip-chip film 300.
The flexible display panel 200 includes a planar area 201, a bending area 202, and a binding area 203, and those skilled in the art can understand that the planar area 201, the bending area 202, and the binding area 203 of the flexible display panel 200 are conventionally divided in the art, which is not described in detail herein. The width of the first plane 410 of the gasket 400 (the linear distance between the two side surfaces of the gasket 400 is the width of the first plane 410) is greater than the width of the plane area 201 of the flexible display panel 100, preferably, the width of the first plane 410 is greater than the width of the flexible display panel 100 by at least 2mm, and the first plane 410 can support the flexible display panel 200 to ensure that the plane area 201 and the bending area 202 of the flexible display panel 200 are relatively stable and are not easy to deform.
The length of the first plane 410 of the gasket 400 (the length of a straight line connecting the first plane 410 with the inclined plane 440 and the curved surface 420) is greater than 10mm, so as to ensure that the flat area 201 and the bending area 202 of the flexible display panel 200 are relatively stable and are not easily deformed.
Preferably, the length of the first plane 410 of the gasket 400 is 15mm ± 5mm, the width of the first plane 410 of the gasket 400 is 40mm ± 5mm, and the thickness of the gasket 400 (the vertical distance between the second plane 430 and the first plane 410) is 3mm ± 1 mm. For example: the length of the first plane 410 of the gasket 400 is 17.57mm, the width of the first plane 410 of the gasket 400 is 42.54mm, and the thickness of the gasket 400 is 3.53 mm.
The slope angle of the slope 440 of the filler pad 400 should not be too large to avoid the flexible circuit board 100 from being broken due to over-bending, and it is preferable that the included angle between the slope 440 of the filler pad 400 and the first plane 410 is less than 30 °, for example, 28 °.
In this application, the material of the filling gasket 400 is at least one of silicone, rubber, and epoxy resin. The material of the protective glue layer 700 is one or a mixture of more than one of silicon nitride, silicon oxide, silicon oxynitride and aluminum oxide. The double-sided conductive adhesive 600 and the transparent optical adhesive 900 are made of common materials in the field, and are not described in detail in the application.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a positional relationship between a cover plate 800 and a filling gasket 400 of a display device 10 according to an embodiment of the present disclosure. In this application, it is preferable that the cover plate 800 is a four-curved cover plate, and the curvature of the curved surface 420 of the filling gasket 400 is the same as the curvature of the cover plate 800 located in the bending region 202, so that the filling gasket 400 is perfectly attached to the inside of the cover plate 800, and a gap is prevented from being generated, which affects the yield of the display device.
In the display device of the present application, the filling gasket 400 wrapped in the flexible circuit board 100, the flexible display panel 200, and the flip-chip film 300 has the same curvature as the cover plate 800, so as to ensure complete attachment without bubbles during attachment; the filling gasket 400 has an irregular shape and a thickness thicker than that of a filling gasket used in a terminal area of a non-curved screen or a left-right hyperbolic screen, so that the material of the filling gasket is at least one of silica gel, rubber and epoxy resin; the length of the first plane 410 of the filling gasket 400 should be longer than that of the bent flexible display panel 200, and it is preferable in this application that the width of the first plane 410 of the filling gasket 400 is greater than that of the plane area 201 of the flexible display panel 200, so as to ensure that the plane area 201 and the bent area 202 of the flexible display panel 200 are relatively stable and are not easily deformed. Meanwhile, the slope angle of the inclined surface 440 of the filling gasket 400 cannot be too large, and it is preferable in this application that the included angle between the inclined surface 440 of the filling gasket 400 and the first plane 410 is less than 30 ° to avoid the flexible circuit board 100 from being broken due to over-bending.
In addition, the display device described herein further includes a heat dissipation composite layer 500, the heat dissipation composite layer 500 is disposed on a side of the flexible display panel 200 close to the gasket 400, extends from the plane region 201 to the bending region 202, and is connected to the flexible circuit board 100 through a double-sided conductive adhesive 600, and the heat dissipation composite layer 500 can effectively improve the heating problem of the display device 10 during operation; the display device 10 further includes a protective glue layer 700, where the protective glue layer 700 is disposed in the bonding region 203, covers the bonding terminals of the flip chip 300 and the flexible display panel 200, and can protect the bonding terminals exposed in the bonding region 203 from being corroded by the external environment.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The display device 10 provided in the embodiment of the present application is described in detail above, and the principle and the embodiment of the present application are explained herein by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (9)
1. A display device comprises a flexible circuit board, a flexible display panel and a cover plate, and is characterized in that the flexible display panel comprises a plane area, a bending area and a binding area, wherein the bending area is positioned between the plane area and the binding area; a chip on film is respectively bound with the flexible circuit board and the flexible display panel in the binding area; wherein the content of the first and second substances,
the cover plate covers the plane area and the bending area of the flexible display panel; and the number of the first and second electrodes,
at least one filling gasket is arranged in an area defined by the flexible circuit board, the flexible display panel and the chip on film together so as to support the flexible circuit board and the chip on film and attach the plane area and the bending area of the flexible display panel to the cover plate;
the filling gasket comprises a first plane, a curved surface, a second plane and an inclined plane; the second plane is parallel to the first plane; the included angle between the inclined plane and the first plane is less than 30 degrees; the curved surface is located between the first plane and the second plane and is matched with the bending area of the flexible display panel.
2. The display apparatus of claim 1, wherein a junction of any adjacent two faces of the filler pad is chamfered.
3. The display device of claim 1, wherein a width of the first plane of the fill pad is greater than a width of a planar area of the flexible display panel.
4. The display device as claimed in claim 1, wherein the material of the filling pad is at least one of silicone, rubber, and epoxy resin.
5. The display device according to claim 1, wherein the display device further comprises a first backplane disposed on the second plane of the filling pad, and the bonding area of the flexible display panel is disposed on the first backplane, so that the flip chip on the first backplane is bonded to the bonding area of the flexible display panel and the flexible circuit board, respectively.
6. The display device of claim 1, further comprising a second backplane disposed between the filler spacer and the flexible display panel and in contact with the flexible display panel in the planar region and the bend region.
7. The display device according to claim 6, wherein the flexible display panel comprises a display panel and a polarizer;
the display panel is in contact with the second back plate;
the polaroid is arranged on one side, far away from the second back plate, of the display panel and is in contact with the display panel in the plane area and the bending area.
8. The display device according to claim 1, further comprising a heat dissipation composite layer disposed on a side of the flexible display panel adjacent to the filling pad, extending from the planar region to the bending region, and connected to the flexible circuit board by a double-sided conductive adhesive.
9. The display device of claim 1, further comprising a protective glue layer disposed in the bonding region covering the bond terminals of the flip-chip film and the flexible display panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966549.1A CN112086495B (en) | 2020-09-15 | 2020-09-15 | Display device |
| PCT/CN2020/122178 WO2022056995A1 (en) | 2020-09-15 | 2020-10-20 | Display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966549.1A CN112086495B (en) | 2020-09-15 | 2020-09-15 | Display device |
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| Publication Number | Publication Date |
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| CN112086495A CN112086495A (en) | 2020-12-15 |
| CN112086495B true CN112086495B (en) | 2022-08-23 |
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| CN202010966549.1A Active CN112086495B (en) | 2020-09-15 | 2020-09-15 | Display device |
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| CN (1) | CN112086495B (en) |
| WO (1) | WO2022056995A1 (en) |
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| CN111128020B (en) * | 2019-12-20 | 2022-12-30 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN111179756B (en) * | 2020-01-03 | 2022-07-26 | 京东方科技集团股份有限公司 | Composite foam, flexible OLED display panel and display device |
| CN210836910U (en) * | 2020-02-20 | 2020-06-23 | 京东方科技集团股份有限公司 | Flexible display panel, touch display module and display device |
-
2020
- 2020-09-15 CN CN202010966549.1A patent/CN112086495B/en active Active
- 2020-10-20 WO PCT/CN2020/122178 patent/WO2022056995A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| CN112086495A (en) | 2020-12-15 |
| WO2022056995A1 (en) | 2022-03-24 |
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