CN113470529A - Display device - Google Patents
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- CN113470529A CN113470529A CN202110744924.2A CN202110744924A CN113470529A CN 113470529 A CN113470529 A CN 113470529A CN 202110744924 A CN202110744924 A CN 202110744924A CN 113470529 A CN113470529 A CN 113470529A
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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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- 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
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present disclosure provides a display device including a display panel and a support layer. The display panel comprises a first area, a second area and a bending area positioned between the first area and the second area, wherein the first area comprises a display area, and the second area comprises a bonding area. The support layer includes a first portion for supporting a first area of the display panel and a second portion for supporting a second area of the display panel, which are spaced apart from each other. At least one of the opposing side surfaces of the first and second portions is configured to have a protrusion. The protrusion of the side surface of the first portion and/or the second portion can contact with the portion of the display panel located in the bending region, so that the side surface of the first portion and/or the second portion can be used for supporting the display panel, the risk of breakage of the display panel is reduced, and the yield of the display device is improved.
Description
Technical Field
At least one embodiment of the present disclosure relates to the field of display, and in particular, to a display device.
Background
With the wide use of electronic display products in daily life of people, the user's demand for the appearance of electronic display products, especially screen occupation, is higher and higher, and under the demand, electronic display products with full-screen display function under the concept of narrow frame and no frame come into play.
The frame region in the display panel in the electronic display product can be bent to the back side thereof, so that a narrow frame or no frame is presented in visual effect. However, the current electronic display products are limited to their own structural design, and after the display panel is bent, the bent portion of the display panel is prone to have uneven stress distribution, which may cause stress concentration and damage the display panel.
Disclosure of Invention
In view of the above, the present disclosure provides a display device, in a position of a support layer corresponding to a bending region of a display panel, a side edge of the support layer is provided with a protrusion, so that the protrusion can be used to support the display panel after the display panel is bent, thereby dispersing stress generated when the display panel is bent, and preventing the display panel from being broken due to stress concentration generated at edges of main surfaces (such as a first main surface and a second main surface) of the support layer, thereby improving yield of the display device.
A first aspect of the present disclosure provides a display device including a display panel and a support layer. The display panel comprises a first area, a second area and a bending area positioned between the first area and the second area, wherein the first area comprises a display area, and the second area comprises a bonding area. The support layer includes a first portion for supporting a first area of the display panel and a second portion for supporting a second area of the display panel, which are spaced apart from each other. At least one of the opposing side surfaces of the first and second portions is configured to have a protrusion.
In the above scheme, after the display panel is bent, the protrusions on the side surfaces of the first portion and/or the second portion can be used for supporting the display panel, so that stress generated when the display panel is bent can be dispersed, the risk of breakage of the display panel is reduced, and the yield of the display device is improved.
In a display device provided in a specific embodiment of the first aspect of the present disclosure, the first portion includes a first main surface for carrying the display panel and a first side surface facing the second portion, the first side surface having a projection so that the first main surface and the first side surface smoothly meet; and/or the second part comprises a second main surface for bearing the display panel and a second side surface facing the second part, and the second side surface is provided with projections so that the second main surface and the second side surface are smoothly jointed.
In the above scheme, after the display panel is bent, stress concentration of the display panel at a boundary between the first main surface (or the second main surface) and the first side surface (or the second side surface) can be eliminated, so that the risk of breakage of the display panel is further reduced, and the yield of the display device is improved.
In a display device provided in a specific embodiment of the first aspect of the present disclosure, a portion of the display panel located in the bending region is bent, and the second portion is located on a side of the first portion facing away from the display panel.
In a display device provided in a specific embodiment of the first aspect of the present disclosure, the protrusion matches a shape of a portion of the display panel located in the bending region, so that an entire surface of the protrusion serves to support the display panel.
In the above scheme, the surface of the protrusion can be completely contacted with the bent part of the display panel, so that the risk of breakage of the display panel is further reduced, and the yield of the display device is improved.
For example, in a display device provided in one specific embodiment of the first aspect of the present disclosure, further, all of the first side surface and/or the second side surface is provided to have a projection.
In the above scheme, all of the first side surface (or the second side surface) can be in complete contact with the bent portion of the display panel, so that the risk of breakage of the display panel is further reduced, and the yield of the display device is improved.
In a display device according to a first aspect of the present disclosure, the first side surface and/or the second side surface has a convex cross-sectional side having an arc shape in a direction perpendicular to a plane of the first portion.
In the above scheme, the cross-sectional shape of the protrusion is an arc shape, which can better fit the shape of the portion of the display panel located in the bending region, thereby further reducing the risk of the display panel breaking and improving the yield of the display device.
In a specific embodiment of the first aspect of the present disclosure, the first side surface and the second side surface have convex cross-sectional sides that are arc-shaped and co-circular.
In the above scheme, the stress generated by the portion of the display panel overlapping the first side surface (or the second side surface) can be uniformly distributed to the greatest extent, so that the risk of the display panel breaking is maximally reduced, and the yield of the display device is improved.
For example, in a display device provided in one specific embodiment of the first aspect of the present disclosure, further, a plane defined by an intersection line of the first main surface and the first side surface and an intersection line of the second main surface and the second side surface passes through a center of a circle in which the first side surface and the second side surface are located.
In the above scheme, under the bending state of the display panel, the size of the bending area of the display panel in the direction along the plane of the first part can be reduced to the maximum extent, and the frame narrowing design of the display device is facilitated.
In a display device according to a first aspect of the present disclosure, the first side surface and the second side surface have convex cross-sectional sides that are curved and that together define an ellipse.
For example, in a display device provided in one specific embodiment of the first aspect of the present disclosure, further, a plane defined by an intersection line of the first main surface and the first side surface and an intersection line of the second main surface and the second side surface passes through two focal points of an ellipse.
In the above-described aspect, the cross-sectional shape of the projection is actually an elliptical arc, in which case the dimension of the bent portion of the display panel in the direction along the plane of the first portion is smaller than 1/2 in the direction perpendicular to the plane of the first portion, thereby contributing to further narrowing the bezel of the display device.
A particular embodiment of the first aspect of the present disclosure provides that the display device may further comprise a spacer located between the first portion and the second portion.
In the above scheme, under the state that the display panel is bent, the distance between the first part and the second part can be adjusted by arranging the spacer, so that the curvature of the part, located in the bending area, of the display panel is adjusted, the risk of breakage of the display panel is reduced, and the yield of the display device is improved.
A specific implementation manner of the first aspect of the present disclosure may further include a protective adhesive layer, where the protective adhesive layer is located in the bending region of the display panel and on a surface of the display panel facing away from the supporting layer.
In the above scheme, the part of the display panel, which is located in the bending area, is protected by the protective adhesive layer, and the stress release of the part of the display panel, which is located in the bending area, is facilitated, so that the risk of breakage of the display panel is reduced, and the yield of the display device is improved.
A specific embodiment of the first aspect of the present disclosure provides a display device, which may further include a flexible circuit board and a chip on the flexible circuit board. One end of the flexible circuit board is bonded on the part of the display panel, which is located in the bonding area, and the chip is connected with the display panel through the flexible circuit board.
Drawings
Fig. 1 is a sectional view of a partial region of a display device.
Fig. 2 is a schematic plan view illustrating a display panel of a display device in a flattened state according to an embodiment of the disclosure.
Fig. 3 is a sectional view of a partial region of the display device shown in fig. 2 in a bent state.
Fig. 4 is a sectional view and a schematic plan view of a partial region of the display device shown in fig. 2.
Fig. 5 is a cross-sectional view of a partial region of another display device in a bent state according to an embodiment of the disclosure.
Fig. 6 is a cross-sectional view of a partial region of another display device in a bent state according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
The display device includes a display panel, and due to a requirement for extremely narrowing a bezel, etc., a partial region (e.g., a bonding region, which may also be referred to as a pad region, etc.) of the display panel may be bent to a back surface, thereby reducing a width of a non-display region of the display device, i.e., reducing a bezel width of the display device. In order to meet the demand for being bendable, the display panel needs to be a flexible panel (flexible as a whole or only the bending region is designed to be flexible), in which case, a support layer may be provided in the display device to support the non-bending portion of the display panel. When the display panel is bent, the bent portion of the display panel is not supported by the support layer, the generated stress is gathered in the bent portion of the display panel, and at the boundary between the bent portion and the non-bent portion (the portion supported by the support layer) of the display panel, there is a boundary between the display panel supported by the support layer and the display panel not supported by the support layer. The bending area of the display panel is usually provided with signal lines, and in the bending process, if cracks are generated due to excessive local stress of the display panel, the signal lines may be broken and the packaging effect of the display panel may be damaged, so that the function of the display panel is poor, and the yield of the display device is reduced.
For example, as shown in fig. 1, the display device may include a display panel 100 'and a support layer 200' for supporting the display panel 100 ', a portion of the display panel 100' is bent to a back surface (a side away from the display surface of the display panel), and the support layer 200 'is broken at a bending region of the display panel 100' to form two portions 210 'and 220' in order to reduce stress and a bending radius generated during bending. In the area where the display panel 100 ' is bent, the side surface of the support layer 200 ' is separated from the display panel 100 ', that is, the bent portion of the display panel 100 ' is not supported by the support layer 200 ', and thus, the attractive force generated by the bent portion of the display panel 100 ' is concentrated toward the boundary M1, M2 between the side surface 201 ', 202 ' of the support layer 200 ' and the surface 211 ', 221 ' for supporting the display panel 100 ', which results in that the display panel 100 ' is easily cracked or even broken due to excessive stress at M1, M2.
The present disclosure provides a display device that can solve the above technical problem. The display device includes a display panel and a support layer. The display panel comprises a first area, a second area and a bending area positioned between the first area and the second area, wherein the first area comprises a display area, and the second area comprises a bonding area. The support layer includes a first portion and a second portion spaced apart from each other, the support layer for supporting the display panel, a portion of the display panel located at the first area being fixed on the first portion, and a portion of the display panel located at the second area being fixed on the second portion, i.e., the first portion for supporting the first area of the display panel, and the second portion for supporting the second area of the display panel. At least one of the opposing side surfaces of the first and second portions is configured to have a protrusion. After the display panel is bent, the protrusions of the side surfaces of the first portion and/or the second portion are in contact with the portion, located in the bending area, of the display panel, so that the side surfaces of the first portion and/or the second portion can be used for supporting the display panel, stress generated when the display panel is bent can be dispersed, the stress concentration degree is reduced, the risk of breakage of the display panel is reduced, and the yield of the display device is improved.
Next, a structure of a display device according to at least one embodiment of the present disclosure will be described with reference to the drawings. In addition, in the drawings corresponding to the embodiments, a spatial rectangular coordinate system is established by taking the plane of the first portion of the supporting layer as a reference, so as to explain the positions of the structures in the display device. In the rectangular space coordinate system, the X axis, the Y axis and the surface of the first part are parallel, the Z axis is perpendicular to the surface of the first part, and the direction from the first part to the second part is parallel to the X axis when the display panel is in a flattened state. For example, the surface on which the first portion is located may be a surface (the first main surface in the following embodiments) of the first portion for supporting the display panel or an arbitrary plane parallel to the surface.
As shown in fig. 2 to 4, the display device provided by the embodiment of the present disclosure includes a display panel 100 and a support layer 200. The display panel 100 includes a first region 11, a second region 12, and a bending region 13, and the bending region 13 is located between the first region 11 and the second region 12. The first region 11 includes a display region 101, and the display region 101 is used to display an image, for example, further, the first region 11 may further include a wiring region located at the periphery of the display region 101, the wiring region being used for a signal line for applying a signal to the display region 101, and the wiring region being used to constitute a bezel of the display device. Second region 12 includes a bonding area 102, where bonding area 102 is used for connection to external circuitry (e.g., a flexible circuit board, a chip, etc.). The support layer 200 for supporting the display panel 100 includes a first portion 210 and a second portion 220, the first portion 210 and the second portion 220 being spaced apart from each other, the first portion 210 of the support layer 200 for supporting a portion of the display panel 100 located in the first area 11, and the second portion 220 of the support layer 200 for supporting a portion of the display panel 100 located in the second area 12. As shown in fig. 4, the opposite side surfaces of the first and second portions 210 and 220 (the first and second side surfaces 201 and 202 shown in fig. 3 and 4) extend toward the bending region 13 such that the opposite side surfaces of the first and second portions 210 and 220 are formed as protrusions. As shown in fig. 3, after the portion of the display panel 100 located in the bending region 13 is bent, the side surfaces of the first portion 210 and the second portion 220 opposite to each other are in contact with the display panel 100, that is, the protrusion may support the display panel 100, so that a portion (referred to as an overlapping portion) of the bending portion of the display panel 100 in contact with the side surfaces of the first portion 210 and the second portion 220 opposite to each other may be supported by the first portion 210 and the second portion 220, so that stress generated by the overlapping portion due to bending may be uniformly distributed under the support of the first portion 210 and the second portion 220, and stress concentration is avoided.
It should be noted that, in the embodiment of the present disclosure, the opposing side surfaces of the first portion and the second portion may be: in a curved state of the display panel as shown in fig. 3, along an extending track of the display panel, the side surfaces of the first portion and the second portion are opposite; alternatively, in a state where the display panel is laid flat as shown in fig. 4, the first and second portions have opposing side surfaces, and in this case, the first and second portions form an opening by being spaced apart from each other, and the opposing side surfaces of the first and second portions are actually opposing side surfaces of the opening.
In a display device provided in at least one embodiment of the present disclosure, the first portion includes a first main surface for carrying the display panel and a first side surface facing the second portion, the first side surface having a projection so that the first main surface and the first side surface smoothly meet; and/or the second part comprises a second main surface for bearing the display panel and a second side surface facing the second part, and the second side surface is provided with projections so that the second main surface and the second side surface are smoothly jointed. After the display panel is bent, the display panel may contact a region (referred to as a smooth region) where the first side surface (or the second side surface) of the support layer smoothly meets the first main surface (or the second main surface), and in the smooth region, the stress of the display panel may be relatively uniformly dispersed, which may further reduce the occurrence of stress concentration, and eliminate the stress concentration generated by the display panel at the interface between the first main surface (or the second main surface) and the first side surface (or the second side surface), thereby further reducing the risk of the display panel breaking, and improving the yield of the display device.
Illustratively, as shown in fig. 3 and 4, the first portion 210 includes a first major surface 211 and a first side surface 201, and the second portion 220 includes a second major surface 221 and a second side surface 202. In the bent state as shown in fig. 3 and the flattened state as shown in fig. 4, both the first main surface 211 and the second main surface 221 contact the display panel 100 to support the display panel 100. The first side surface 201 and the second side surface 202 are oppositely disposed. As shown in fig. 3 and 4, the first main surface 211 smoothly meets the first side surface 201, and the second main surface 221 smoothly meets the second side surface 202. It is known that the larger the local deformation degree of an object is, the larger the stress is generated, and accordingly, the stress is likely to concentrate at a position where the deformation degree is large. In the above-described aspect, when the display panel 100 extends from the first main surface 211 to the first side surface 201, at the boundary between the first main surface 211 and the first side surface 201, the degree of bending of the display panel 100 may be gradually changed, that is, the display panel 100 is prevented from being locally deformed to an excessively large degree, so that the risk of generating the stress concentration problem is reduced.
In the embodiment of the present disclosure, one of the "smoothly connected" surfaces (e.g., the first and second side surfaces of the embodiment of the present disclosure) is a curved surface, and the slope of the curved surface is continuously gradual, that is, the curve formed by the smoothly connected curved surfaces (including the end point corresponding to the intersection line connecting the surface and the other connected surface) is derived from the mathematical meaning.
In the display device provided by at least one embodiment of the present disclosure, a portion of the display panel located in the bending region is bent, and the second portion is located on a side of the first portion facing away from the display panel. For example, as shown in fig. 2 to 4, the back surface of the display panel 100 faces the support layer 200, and the support layer 200 does not block the display image of the display panel 100. In the case that the display panel 100 is in a flat state as shown in fig. 4, the display panel 100 is disposed (e.g., attached) on the support layer 200, and then the portion of the display panel 100 located in the bending region 13 is bent, so that the portion of the display panel 100 located in the second region 12 and the second portion 220 of the support layer 200 move to the side of the first portion 210 away from the display panel 100, that is, the portion of the display panel 100 located in the second region 12 and the second portion 220 move to the back side, as shown in fig. 3, the portion of the display panel 100 located in the second region 12 and the second portion 220 do not participate in forming a bezel of the display device, thereby facilitating a very narrow bezel design of the display device.
In a display device provided in a specific embodiment of the first aspect of the present disclosure, the protrusion matches a shape of a portion of the display panel located in the bending region, so that an entire surface of the protrusion serves to support the display panel. Under the condition that the protrusion is matched with the shape of the bent part of the display panel, the surface of the protrusion can be completely contacted with the bent part of the display panel, namely, the surface of the display panel facing the supporting layer and the surface of the protrusion are conformal in the area where the display panel and the protrusion are overlapped, so that the stress in the display panel can be uniformly distributed, the risk of fracture of the display panel is further reduced, and the yield of the display device is improved. Illustratively, as shown in fig. 3, the curvature of the surface of the portion of the display panel 100 overlapping the first side surface 201 facing the first portion 210 is the same as the curvature of the first side surface 201, and thus, the portion of the display panel 100 overlapping the first side surface 201 and the first side surface 201 may be in full contact, i.e., there is no gap at the interface therebetween. Also, the portion of the display panel 100 overlapping the second side surface 202 and the second side surface 202 may be in full contact.
For example, in a display device provided in at least one embodiment of the present disclosure, all of the first side surface and/or the second side surface is provided to have a protrusion. The convex surface is actually a first side surface (or a second side surface), after the display panel is bent, the whole first side surface (or the second side surface) can be completely contacted with the bent part of the display panel, and the stress in the display panel can be uniformly distributed in the overlapped area of the display panel and the first side surface (or the second side surface), so that the risk of breakage of the display panel is further reduced, and the yield of the display device is improved. Illustratively, as shown in fig. 3 and 4, all of the first side surface 201 and the second side surface 202 are configured to form a protrusion, i.e., the protrusion surface is all of the first side surface 201 and the second side surface 202. As such, as shown in fig. 3, after the display panel 100 is bent, any one of the areas of the first and second side surfaces 201 and 202 may be used to support the display panel 100.
In a display device provided in at least one embodiment of the present disclosure, the first side surface and/or the second side surface has a convex cross-sectional edge in an arc shape in a direction perpendicular to a plane of the first portion. When the display panel is in a bent state, the natural state of the bent part of the display panel is in an arc shape. Therefore, the cross section of the protrusion is arc-shaped, so that the shape of the part, located in the bending area, of the display panel can be more matched, stress in the display panel can be further uniformly distributed, the risk of breakage of the display panel is reduced, and the yield of the display device is improved. Illustratively, as shown in fig. 3 and 4, the first side surface 201 and the second side surface 202 have an arc shape at an interface taken in a plane defined by the X axis and the Z axis.
It should be noted that the "arc" may be taken from a circular arc and an ellipse, that is, the "arc" in the embodiment of the present disclosure may be a circular arc or an elliptical arc, and in the case that the first side surface and/or the second side surface is an arc, whether the arc is a circular arc or an elliptical arc may be selected according to actual requirements. The following description will be given by way of several specific examples. Further, in these embodiments, all of the first side surface and the second side surface are provided to have the projections, and the surface having the projections of the first side surface is actually the first side surface, and accordingly, the surface having the projections of the second side surface is actually the second side surface.
In a display device provided in at least one embodiment of the present disclosure, the first side surface and the second side surface are both arc-shaped and co-circular in cross-sectional shape. In this way, the first side surface (or the second side surface) has a cross-sectional shape substantially in the form of a circular arc, in which case additional deformation of the display panel caused by the first portion and the second portion supporting the display panel can be reduced or eliminated, and stress generated at a portion of the display panel overlapping the first side surface (or the second side surface) can be uniformly distributed to the greatest extent, thereby maximizing reduction in the risk of breakage of the display panel and improving yield of the display device. Illustratively, as shown in fig. 3 and 4, in the bending region 13 of the display panel 100, a cross section of a plane defined by surfaces facing the first portion 210 and the second portion 220 along the X axis and the Z axis is an arc of a circle having a center Q and a radius R. In this way, the natural state of the first side surface 201 of the first portion 210 and the second side surface 202 of the second portion 220 and the portion of the display panel 100 located in the bending region 13 in the bending state are more matched, so that the additional deformation of the display panel 100 caused by the first portion 210 and the second portion 220 supporting the display panel 100 is reduced or eliminated, and accordingly, in the state of maintaining the arc shape, the deformation degree of the portion of the display panel 100 located in the bending region 13 is the same, that is, the stress magnitude of the portion of the display panel 100 located in the bending region 13 is equal, and the stress distribution of the portion of the display panel 100 located in the bending region 13 is uniform.
For example, in a display device provided in at least one embodiment of the present disclosure, a plane defined by an intersection line of the first main surface and the first side surface and an intersection line of the second main surface and the second side surface passes through a center of a circle in which the first side surface and the second side surface are located. Under the condition that the cross section of the first side surface (or the second side surface) is ensured to be in the shape of a circular arc so that the stress generated by the part of the display panel overlapped with the first side surface (or the second side surface) can be uniformly distributed to the greatest extent, the size of the bending area of the display panel in the direction along the plane where the first part is located can be maximally reduced under the bending state of the display panel, so that the frame width of the display device is reduced, and the frame extremely-narrowing design of the display device is facilitated. Illustratively, as shown in fig. 3, the cross section of the first side surface 201 and the second side surface 202 is an arc, the center of the circle of the arc is Q, the boundary between the first side surface 201 and the first main surface 211 and the boundary between the second side surface 202 and the second main surface 221 define a plane P, and the plane P passes through the center of the circle Q, i.e., the boundary between the first side surface 201 and the first main surface 211 and the boundary between the second side surface 202 and the second main surface 221 are flush, so that the size of the portion of the display panel 100 located in the bending region 13 in the direction parallel to the plane of the first portion (the direction of the X axis) is only the sum of the radius R of the circle and the thickness of the display panel 100, thereby narrowing the frame of the display device as much as possible.
In at least one embodiment of the present disclosure, a display device is provided in which the first side surface and the second side surface are both arc-shaped in cross-sectional shape and collectively define an ellipse. For example, some embodiments of the present disclosure provide a display device in which a plane defined by an intersection line of the first main surface and the first side surface and an intersection line of the second main surface and the second side surface passes through two focal points of an ellipse. The cross-sectional shape of the first side surface (or the second side surface) is actually an elliptical arc, in which case the dimension of the bent portion of the display panel in the direction along the plane of the first portion is smaller than 1/2 in the direction perpendicular to the plane of the first portion, thereby facilitating further narrowing of the bezel of the display device, and furthermore, the stress generated by the portion of the display panel overlapping the first side surface (or the second side surface) is relatively uniformly distributed under the support of the first side surface of the first portion and the second side surface of the second portion, thereby facilitating reduction of the risk of breakage of the display panel and improvement of the yield of the display device. Illustratively, as shown in fig. 5, the cross-section of the first side surface 201a and the second side surface 202a is an elliptical arc, the two foci of the ellipse of which the elliptical arc is located are a1, a2, and the boundary between the first side surface 201a and the first main surface 211a and the boundary between the second side surface 202a and the second main surface 221a define a plane P, which passes through the foci a1, a2, i.e., the boundary between the first side surface 201a and the first main surface 211a and the boundary between the second side surface 202a and the second main surface 221a are flush. For example, the length of the major axis of the ellipse in which the elliptical arc is located may be 2R, and in the direction parallel to the plane in which the first portion is located (the direction of the X axis), the size of the portion of the display panel 100a located in the bending region is only half of the minor axis of the ellipse and the sum of the thicknesses of the display panel 100a, while in the ellipse, the minor axis is smaller than the major axis, that is, the size of the portion of the display panel 100a located in the bending region is smaller than the sum of R and the thickness of the display panel 100 a.
For example, other embodiments of the present disclosure provide display devices in which the minor axis of the ellipse is located in a plane defined by the intersection line of the first major surface and the first side surface and the intersection line of the second major surface and the second side surface. In this case, the distance between the two ends of the portion of the display panel located in the bending region may be reduced as much as possible, which is equivalent to reducing the distance between the first portion and the second portion (in the bending state), thereby facilitating the light and thin design of the display device. In addition, under the support of the first side surface of the first part and the second side surface of the second part, the stress generated by the part of the display panel overlapped with the first side surface (or the second side surface) is still relatively uniformly distributed, so that the risk of the display panel breaking is favorably reduced, and the yield of the display device is improved.
In the embodiment of the present disclosure, in the case of determining the sectional shapes of the first side surface and the second side surface, parameters such as the thickness of the support layer, the interval between the first main surface and the second main surface, and the like may be calculated. Illustratively, taking the cross-sectional shapes of the first side surface and the second side surface as shown in fig. 3 and 4 as circular arc shapes as an example, in the flat state of the display panel 100, the dimension of the first side surface and the second side surface along the X-axis direction is L1, that is, the dimension of the overlapping portion of the display panel 100 and the first side surface and the second side surface is L1, the dimension of the opening (the portion not overlapping with the support layer 200) of the display panel 100 is L2, and if the thickness of the support layer is D and the radius of the circle where the first side surface 201 and the second side surface 202 are located is required to be R, the above parameters need to satisfy the formula: (R-D)2+L12＝R2And the arc angles corresponding to the first side surface 201 and the second side surface 202 can be calculated according to the above parameters, and then the arc angles corresponding to the portion of the display panel 100 not overlapped with the supporting layer 200 are calculated, so that L2 (in this case, the arc length) is calculated according to the circumference (2 pi R) of the circle. For example, in some embodiments of the present disclosure, the first side surface 201 and the second side surface 202 respectively correspond to an arc angle of 1/8 circles, that is, the arc angle of L2 corresponds to a 1/4 circle, and L2 is (pi R)/2.
At least one embodiment of the first aspect of the present disclosure provides that the display device may further include a spacer positioned between the first portion and the second portion. The thickness of the support layer is generally limited, at least to avoid increasing the weight of the device, for example, the support layer has a thickness as small as possible while ensuring sufficient strength. In this way, after the display panel is bent, if the distance between the first main surface of the first portion and the second main surface of the second portion is smaller, the bent portion of the display panel has a larger curvature, that is, the stress of the bent portion of the display panel is increased, so that the risk of the bent portion of the display panel being broken due to the excessive stress is increased. Under the state that display panel is buckled, can adjust the interval of first portion and second portion through setting up the shock insulator to adjust the camber that is located the regional part of buckling of display panel, be equivalent to the size of the stress that produces when can adjusting display panel and buckle, thereby reduce display panel and take place cracked risk, improve display device's yield. For example, as shown in fig. 6, after the display panel 100 is bent, the spacer 400 is located between the first portion 210 and the second portion 220 of the support layer 200, and by designing the thickness of the spacer 400 in the Z-axis direction (the direction perpendicular to the plane of the first portion 210), the radius R corresponding to the circular arc shown in fig. 3 or the length of the major axis corresponding to the elliptical arc shown in fig. 5 can be adjusted, so as to adjust the curvature of the portion of the display panel 100 located in the bent region.
For example, in some embodiments of the present disclosure, in a state where the display panel is bent, a foam, a shielding layer, or other structures may be further disposed between the first portion and the second portion of the supporting layer, and the structures may cooperate with the spacer to jointly adjust the curvature of the portion of the display panel located in the bent region. Illustratively, as shown in fig. 6, the foam 500 and the shielding layer 600 are sequentially disposed on a side of the first portion 210 of the support layer 200 facing away from the display panel 100. The shielding layer 600 may be a metal film layer, and the metal may be a simple metal or an alloy such as copper, aluminum, iron, molybdenum, titanium, and the like.
The display device provided by at least one embodiment of the present disclosure may further include a protective adhesive layer, where the protective adhesive layer is located in the bending region of the display panel and located on a surface of the display panel facing away from the support layer. The part of the display panel, which is located in the bending area, is protected through the protection adhesive layer, so that the circuit of the bending area is prevented from being damaged in the bending operation of the display panel, and the protection adhesive layer has certain elasticity to help the stress release of the part of the display panel, which is located in the bending area, so that the risk of breakage of the display panel is reduced, and the yield of the display device is improved. Illustratively, as shown in fig. 6, the protective adhesive layer 300 is located on a side of the display panel 100 facing away from the support layer 200 and is configured to cover the bending region of the display panel 100. For example, the protective adhesive layer 300 may be a release film or the like. For example, as shown in fig. 6, the protective adhesive layer 300 may also extend into the first region and/or the second region of the display panel 100 according to actual needs.
The display device provided by at least one embodiment of the present disclosure may further include a flexible circuit board and a chip on the flexible circuit board. One end of the flexible circuit board is bonded on the part of the display panel, which is located in the bonding area, and the chip is connected with the display panel through the flexible circuit board. Illustratively, as shown in fig. 4 and 6, one end of the flexible circuit board 110 is disposed with the chip 120, and the other end thereof is bonded in the bonding area 102 of the display panel 100, so as to realize signal connection between the chip 120 and circuits (e.g., pixel driving circuits described below) in the display panel 100.
For example, the chip may be a central processing unit, a digital signal processor, a single chip, a programmable logic controller, or the like. For example, the chip may further include a memory, a power module, and the like, and power supply and signal input and output functions are realized through additionally provided wires, signal lines, and the like. For example, a chip may also include hardware circuitry, as well as computer executable code, and the like. The hardware circuits may include conventional Very Large Scale Integration (VLSI) circuits or gate arrays and off-the-shelf semiconductors such as logic chips, transistors, or other discrete components; the hardware circuitry may also include field programmable gate arrays, programmable array logic, programmable logic devices, or the like.
For example, in the embodiments of the present disclosure, the display panel may be an organic light emitting diode display panel (OLED panel), and the OLED panel may be set to have a top emission mode or a bottom emission mode as needed. For example, the OLED panel includes an array substrate including a base and a driving circuit layer, and a display function layer. The driving circuit layer may include a pixel driving circuit including a plurality of transistors, capacitors, and the like, for example, formed in various forms of 2T1C (i.e., 2 transistors (T) and 1 capacitor (C)), 3T1C, or 7T 1C. The display function layer may include a plurality of light emitting devices in a display region in the first region of the display panel, each light emitting device forming a sub-pixel, and a plurality of sub-pixels adjacent to each other and emitting light of different colors constituting one large pixel.
For example, in at least one embodiment of the present disclosure, the display device may further include functional structures such as a touch panel, an optical film, a cover plate, and a color film, and the types of the functional structures may be selected according to actual needs. Illustratively, as shown in fig. 6, the display device includes an optical film 700 and a cover 900 stacked on the display panel 100, the optical film 700 and the cover 900 are located on the display side of the display panel 100, and the optical film 700 and the cover 900 may be attached together by an optical adhesive layer 800 (e.g., OCA adhesive, pressure-sensitive adhesive, etc.).
For example, the optical film may include one or a combination of optical film layers such as a polarizer, a wave plate (e.g., 1/4 wave plate or 1/2 wave plate), a light-condensing film, and a scattering film.
For example, the cover plate may be provided as a single layer structure, or may be provided as a double layer structure. For example, the cover may include two sub-covers attached together, which may be referred to as an upper cover and a lower cover, the lower cover being located between the upper cover and the display panel. For example, the lower cover plate may be provided with a black matrix or the like.
For example, the display device provided by the embodiments of the present disclosure may be any product or component having a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A display device, comprising:
the display panel comprises a first area, a second area and a bending area positioned between the first area and the second area, wherein the first area comprises a display area, and the second area comprises a bonding area;
a support layer including a first portion and a second portion spaced apart from each other, the first portion for supporting a first area of the display panel, the second portion for supporting a second area of the display panel;
wherein at least one of the opposing side surfaces of the first and second portions is configured to have a protrusion.
2. The display device according to claim 1,
the first portion includes a first main surface for carrying the display panel and a first side surface facing the second portion, the first side surface having the protrusions such that the first main surface and the first side surface smoothly meet; and/or
The second portion includes a second main surface for carrying the display panel and a second side surface facing the second portion, the second side surface having the projection so that the second main surface and the second side surface smoothly meet.
3. The display device according to claim 2,
the portion of the display panel located in the bending area is bent, and the second portion is located on one side of the first portion, which faces away from the display panel.
4. The display device according to claim 3,
the protrusion matches a shape of a portion of the display panel located at the bending region such that an entire surface of the protrusion is used to support the display panel, and preferably, all of the first side surface and/or the second side surface is provided with the protrusion.
5. The display device according to claim 4,
the edge of the cross section of the protrusion is arc-shaped along the direction vertical to the plane of the first part.
6. The display device according to claim 5,
the edges of the cross section of the protrusions on the first side surface and the second side surface are arc-shaped and are co-circular.
7. The display device according to claim 6,
a plane defined by the boundary line of the first main surface and the first side surface and the boundary line of the second main surface and the second side surface passes through the center of a circle where the first side surface and the second side surface are located.
8. The display device according to claim 5,
the edges of the cross-section of the protrusions provided on the first side surface and the second side surface are arc-shaped and together define an ellipse.
9. The display device according to claim 8,
a plane defined by an intersection line of the first main surface and the first side surface and an intersection line of the second main surface and the second side surface passes through two focal points of the ellipse.
10. The display device according to any one of claims 3 to 9, further comprising:
a spacer positioned between the first portion and the second portion.
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