CN113936549A - Bent cushion block, display panel and display device - Google Patents
Bent cushion block, display panel and display device Download PDFInfo
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- CN113936549A CN113936549A CN202010603802.7A CN202010603802A CN113936549A CN 113936549 A CN113936549 A CN 113936549A CN 202010603802 A CN202010603802 A CN 202010603802A CN 113936549 A CN113936549 A CN 113936549A
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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Abstract
The invention discloses a bending cushion block, a display panel and a display device, wherein the bending cushion block is provided with a plane part and a bending part which are distributed successively in the width direction of the bending cushion block, the bending part is bent in an accommodating cavity of a flexible display substrate by the curvature of a first curved surface area, at least the bending part is provided with a plurality of cutting grooves which are arranged at intervals in the width direction of the bending part, the cutting grooves extend along the length direction of the bending cushion block, the opening is positioned on one side surface in the thickness direction of the bending cushion block, and the cutting grooves are grooves with the width reduced from the opening to the bottom of the bending cushion block. The bending cushion block provided by the invention is not easy to rebound and deform, the problem that the screen body bending area is pulled or the circuit is broken due to the rebound deformation of the bending cushion block is not easy to occur in the display panel adopting the bending cushion block, and the yield is high.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a bending cushion block, a display panel and a display device.
Background
In recent years, a full-screen is a mainstream design scheme in the display field and is favored by consumers, and a curved-surface display technology is produced to improve the screen occupation ratio. At present, the flexible characteristic of the flexible screen is mainly utilized to realize the full-screen, the edge of the flexible screen is bent to the back of the main body display area, the width of a frame of the flexible screen is further reduced, and the screen occupation ratio is improved.
The flexible screen bending technology is a key technical difficulty in the development process of a curved surface display technology, and the display panel after being bent in the prior art is very easy to have the problems of pulling of a bending area and circuit fracture, so that the yield of the display screen product is low and even the quality problem is caused.
Therefore, it is desirable to provide a new display panel and a new display device.
Disclosure of Invention
The invention aims to provide a bending cushion block, a display panel and a display device, wherein the bending cushion block is not easy to rebound and deform, the display panel adopting the bending cushion block is not easy to have the problems of pulling of a screen body bending area and circuit fracture, and the yield is high.
On one hand, the invention provides a bending cushion block, which is used for a display panel, the display panel comprises a flexible display substrate, the flexible display substrate comprises a plane area, a first curved area, a bending area, a second curved area and an edge area which are arranged in sequence, the plane area, first curved surface district, bending zone, second curved surface district and marginal zone enclose to close and form and hold the cavity, the cushion that bends sets up and uses in holding the cavity, the cushion that bends is flexible substrate, the cushion that bends has the plane portion and the portion of bending that distribute in succession on self width direction, the portion of bending is crooked with the curvature of first curved surface district in holding the cavity, the portion of bending has a plurality of slots that set up at mutual interval on the width direction of the portion of bending at least, the slot extends and the opening is located the lateral surface on the cushion thickness direction of bending along the length direction of the cushion that bends, the slot is by the opening is to self bottom direction upper width reduction shape recess.
According to a first aspect of an embodiment of the present invention, the depth of the cutting groove in the thickness direction of the bending pad is smaller than the thickness of the bending pad.
According to one aspect of the invention, the cross section of the cutting groove in the direction from the opening to the bottom of the cutting groove is in a V shape, the cutting groove is provided with two inner surfaces which are connected with each other at a preset included angle, and the two inner surfaces are aligned and attached in the bending process of the bending part, so that the radians of the two arc surfaces of the bending part are respectively matched with the radians of the first curved surface area and the second curved surface area.
According to one aspect of the invention, the number of cuts n is given by the formula
Determining, wherein A is a bending angle of the bending part when the bending part is bent by the curvature of the first curved surface area, alpha is an included angle between two inner surfaces of the cutting groove, H is the depth of the cutting groove, l is the opening width of the cutting groove on the surface of the bending part, n is more than or equal to 2 and less than or equal to 6, alpha is more than or equal to 0 and less than or equal to 45 degrees, A is more than 0 and less than or equal to 90 degrees, H is more than 0 and less than or equal to 0.75H, H is the thickness of the bending cushion block, and the units of l, H and H are consistent.
According to one aspect of the present invention, a bending mat includes a support base layer, a first adhesive layer and a second adhesive layer respectively disposed on both side surfaces of the support base layer in a thickness direction, and a cutting groove disposed on the first adhesive layer and the support base layer; first adhesive layer thickness H1And the thickness H of the supporting substrate2Ratio of (1) and thickness H of second adhesive layer3And the thickness H of the supporting substrate2The ratio of (A) to (B) is 0.1-0.3; depth h of the portion of the cutting groove located on the supporting substrate2From the formula h2＝κH2Is determined in which H2Kappa is more than or equal to 0.4 and less than or equal to 0.6 for the thickness of the supporting base layer.
According to one aspect of the invention, the material of the support substrate is polyethylene terephthalate or polyurethane; the first sticking layer and the second sticking layer are made of an acrylic adhesive or a silica gel or an acrylic adhesive.
According to one aspect of the invention, the undercut is laser cut to shape.
In another aspect, the present invention further provides a display panel, including: the flexible display substrate comprises a plane area, a first curved area, a bending area, a second curved area and an edge area which are arranged in sequence, wherein the plane area, the first curved area, the bending area, the second curved area and the edge area are encircled to form a containing cavity; and the bending cushion block is arranged in the accommodating cavity and is bent by the curvature of the first curved surface area, and the bending cushion block is as described above.
According to one aspect of the present invention, the display panel further comprises a cover plate, the cover plate comprises a planar plate body and a curved plate body on at least one side of the planar plate body, the planar area of the flexible display substrate is attached to the planar plate body of the cover plate, and the first curved area of the flexible display substrate is attached to the curved plate body of the cover plate.
In another aspect, the present invention further provides a display device, including the display panel as described above.
The invention provides a bending cushion block, a display panel and a display device, wherein the bending cushion block is provided with a plane part and a bending part which are distributed successively in the width direction of the bending cushion block, the bending part is bent in a containing cavity of a flexible display substrate by the curvature of a first curved surface area, at least the bending part is provided with a plurality of cutting grooves which are arranged at intervals in the width direction of the bending part, the bending stress generated when the bending part is bent can be reduced by utilizing the cutting grooves, the elastic resilience force of the bending part is reduced, so that the bending part can keep the bending shape, the bending part is not easy to rebound into a plane and further the display panel adopting the bending cushion block is not easy to generate the problems of pulling of a screen body bending area or circuit fracture caused by the rebound deformation of the bending cushion block, and the yield is higher.
Drawings
In the following, brief descriptions will be given to the drawings required to be used in the embodiments of the present invention, and those skilled in the art can obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a bending pad provided in an embodiment of the present invention;
fig. 3 is a schematic structural view of a bending portion of a bending cushion block provided in an embodiment of the present invention in a bent state;
FIG. 4 is a schematic structural view of a bending pad according to another embodiment of the present invention;
fig. 5 is a schematic structural view of a bending portion of a bending pad block in a bent state according to another embodiment of the present invention.
Description of reference numerals:
10-a flexible display substrate; 11-a planar area; 12-a first curved region; 13-a bending zone; 14-a second curved region; 15-edge zone;
20-bending the cushion block; 21-plane section; 22-bending part; 23-grooving; 201-a first adhesive layer; 202-a support substrate; 203-a second adhesive layer;
30-a cover plate; 31-a planar plate body; 32-curved panel body.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention, for the purposes of illustrating the principles of the invention. Additionally, the components in the drawings are not necessarily to scale. For example, the dimensions of some of the elements or regions in the figures may be exaggerated relative to other elements or regions to help improve understanding of embodiments of the present invention.
Furthermore, the terms "comprises," "comprising," "has," "having" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure or component comprising a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure or component. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
For better understanding of the present invention, the following describes the bending pad, the display panel and the display device in detail with reference to fig. 1 to 5.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. The display panel may be an Organic Light Emitting Diode (OLED) display panel.
The display panel provided by the embodiment of the invention comprises a flexible display substrate 10 and a bending cushion block 20.
The flexible display substrate 10 comprises a plane area 11, a first curved area 12, a bending area 13, a second curved area 14 and an edge area 15 which are arranged in sequence, and the second curved area 14 and the edge area 15 are bent to the back sides of the plane area 11 and the first curved area 12 through the bending area 13, so that full-screen display of the display panel is achieved. After the flexible display substrate 10 is bent by the bending area 13, the planar area 11, the first curved area 12, the bending area 13, the second curved area 14 and the edge area 15 enclose to form a containing cavity.
Bending cushion blocks 20 are arranged in the accommodating cavity and are bent with the curvature of the first curved surface area 12, the second curved surface area 14 and the marginal area 15 of the flexible display substrate 10 can be well supported through the bending cushion blocks 20, the problems that the flexible display substrate 10 is pulled by the bending area 13 and the circuit is broken after being bent by the bending area 13 are avoided, and the service life of the display panel can be prolonged.
It can be understood that the planar area 11 is a main body display area, the first curved area 12 is an edge display area, at least a part of the area of the first curved area 12 has a display function, the second curved area 14 and the edge area 15 are wiring areas, the wiring areas are located on the back of the display area after being bent through the bending area 13, so that the edge area of the pixel outgoing line connected with the external circuit is located on the back side of the display area, and a narrow frame effect of the curved display screen can be achieved.
In some alternative embodiments, the flexible display substrate may be an Organic Light Emitting Diode (OLED) display substrate, or a Quantum Dot Light Emitting Diodes (QLED) display substrate.
In some optional embodiments, the flexible display substrate is rectangular, and one or two or three or four wiring regions of the flexible display substrate are all bent to the back of the display region.
In some alternative embodiments, the bending angle of the bending region 13 of the flexible display substrate may be 180 °, and the shape of the second curved region 14 matches and corresponds to the shape of the first curved region 12.
On the basis of this, the arc radius R of bending zone 13 is determined by the formula R ═ H/2, where H is the thickness of bending pad 20.
In some alternative embodiments, the display screen provided in the embodiments of the present invention further includes a cover 30, where the cover 30 includes a planar plate 31 and a curved plate 32 on at least one side of the planar plate 31, the planar area 11 of the flexible display substrate is attached to the planar plate 31 of the cover 30, and the first curved area 12 of the flexible display substrate is attached to the curved plate 32 of the cover 30.
Alternatively, the flat area 11 of the flexible display substrate and the flat plate 31 of the cover 30 may be fixed by bonding, and the first curved area 12 of the flexible display substrate and the curved plate 32 of the cover 30 are fixed by bonding.
In some alternative embodiments, the cover plate 30 may be rectangular, the cover plate 30 may be a curved glass with one or two or three or four curved edges, and fig. 1 only shows the flexible display substrate and the curved edge portions of the cover plate 30.
The embodiment of the invention also provides the bending cushion block 20 which is not easy to rebound and deform, the bending cushion block 20 can be placed in the accommodating cavity of the flexible display substrate for use, the problems of pulling of the bending area 13 and circuit fracture of the flexible display substrate can be better avoided, and the service life of the display panel is further prolonged. It should be noted that the bending mat 20 according to the embodiment of the present invention may be manufactured and sold as an independent member, or may be sold together with a display screen as a part of the display screen.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a bending pad 20 according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a bending portion of the bending pad 20 in a bent state according to an embodiment of the present invention.
In the bending cushion block 20 provided by the embodiment of the invention, the bending cushion block 20 is a flexible base material, the bending cushion block 20 has a planar portion 21 and a bending portion 22 which are sequentially distributed in the width direction of the bending cushion block 20, when the bending cushion block 20 is arranged in the accommodating cavity for use, the bending portion 22 is bent at the curvature of the first curved surface portion 12, at least the bending portion 22 has a plurality of cutting grooves 23 which are arranged at intervals in the width direction of the bending portion 22, the cutting grooves 23 extend along the length direction of the bending cushion block 20 and have openings on one side surface in the thickness direction of the bending cushion block 20, and the cutting grooves 23 are groove with reduced width from the openings to the bottom of the bending cushion block 20.
In the bending cushion block 20 provided by the embodiment of the invention, the cutting groove 23 is arranged on the bending part 22, so that on the basis of ensuring the basic supporting performance of the bending cushion block, the bending stress generated when the bending part 22 is bent can be reduced by using the cutting groove 23, and the elastic resilience of the bending part 22 is reduced, so that the bending part 22 can keep a bending form and is not easy to rebound to form a plane, and the bending cushion block 20 is not easy to rebound and deform. And then adopt this bending cushion 20's display panel, difficult appearing because of the screen body bending region 13 that bending cushion 20 rebound and warp and result in drags or the cracked problem of circuit, the yields is higher.
In some alternative embodiments, bending pad 20 provided by embodiments of the present invention may have cutting groove 23 only at bending portion 22. Of course, it is also possible to provide the cutting groove 23 on both the bending portion 22 and the plane portion 21, and it is also within the protection scope of the present invention.
It will be appreciated that to ensure the integrity and support of dog pad 20, slot 23 has a depth in the thickness direction of dog pad 20 that is less than the thickness of dog pad 20.
In some alternative embodiments, the cutting grooves 23 of the bending portion 22 are equally spaced in the width direction of the bending portion 22, so that the bending curvature and stress of each portion in the width direction of the bending portion 22 are uniform when the bending portion is bent.
In some alternative embodiments, when the bending pad 20 is placed in the accommodating cavity of the flexible display substrate for use, a side surface of the bending pad 20 having the opening of the cutting groove 23 may be away from the cover plate 30, and when the bending portion 22 is bent at the curvature of the first curved surface region 12, the cutting groove 23 is tightened, so that the supporting effect of the bending pad 20 can be ensured.
In some optional embodiments, when the bending cushion block 20 is placed in the accommodating cavity of the flexible display substrate for use, a side surface of the planar portion 21 facing the cover plate 30 is attached to a back surface of the planar region 11 of the flexible display substrate, the bent portion 22 is bent at a curvature of the first curved region 12 in the accommodating cavity, a side surface of the bent portion 22 facing the cover plate 30 is attached to a back surface of the first curved region 12 of the flexible display substrate, the second curved region 14 of the flexible display substrate is attached to a side surface of the bent portion 22 facing away from the cover plate 30, the edge region 15 of the flexible display substrate is attached to a side surface of the planar portion 21 facing away from the cover plate 30, so that the bent portion 22 supports the second curved region 14 of the flexible display substrate 10, and the planar portion 21 supports the edge region 15.
In some optional embodiments, the cross section of the cut groove 23 in the extending direction thereof may be V-shaped, the cut groove 23 has two inner surfaces connected at a preset included angle, the two inner surfaces of the cut groove 23 can be aligned and attached in the bending process of the bending portion 22, and when the two inner surfaces of the cut groove 23 are aligned and attached, the radians of the two arc surfaces of the bending portion 22 may be respectively matched with the radians of the first curved surface region 12 and the second curved surface region 14; when the bending cushion block 20 is placed in the accommodating cavity of the flexible display substrate for use, each cutting groove 23 is tightened until two inner surfaces of the cutting groove are attached without a gap, the bending part 22 is bent with the curvature of the first curved surface area 12, and two arc surfaces of the bending part 22 are respectively matched and attached with the first curved surface area 12 and the second curved surface area 14 of the flexible display substrate, so that a better supporting effect can be achieved, and the bending part 22 is less prone to rebound and deformation.
It can be understood that the number n of the slits 23, the included angle α between the two inner surfaces of the slits 23, and the bending angle a of the bending portion 22 when bending with the curvature of the first curved surface region 12 are as follows:
A＝n×α。
wherein, since the bending angle of the first curved surface region 12 with respect to the planar region 11 is generally not more than 90 °, a ranges from 0 ° to 90 °.
The more the number n of the cutting grooves 23 is, the more uniform the radian of the bending part 22 of the bending cushion block 20 is when bending, the more easily the bending part is formed into an arc, but the more difficult the process is, for the convenience of processing, the number n of the cutting grooves 23 may be set to 2 to 6, and the range of the included angle α between the two inner surfaces of the cutting grooves 23 may be set to 0 to 45 °.
It is understood that when the bending angle a of the first curved surface region 12 with respect to the planar region 11 is 60 °, that is, when the bending angle a of the bent portion 22 at the curvature of the first curved surface region 12 is 60 °, if α is 15 °, n is 4, and if α is 20 °, n is 3.
When the depth of the slit 23 is h and the opening width of the slit 23 on the surface of the bent portion 22 is l:
therefore, the temperature of the molten metal is controlled,
it will be appreciated that the greater the depth h of the slot 23, the less resilient the bend 22 will be to bend and the less strong the bending pad 20 will be. Optionally, to ensure the integrity and support of dog pad 20, the ratio of the depth H of slot 23 to the thickness H of dog pad 20 is no greater than 0.75, with units of l, H, and H being identical.
In some alternative embodiments, the thickness H of the bending pad 20 ranges from 0.15mm to 0.5mm, depending on the specific design requirements of the display panel. Alternatively, thickness H of dog leg 20 may be 0.2mm, 0.4 mm. Of course, the thickness of the bent pad 20 is not particularly limited in the present invention, and may be set according to actual use requirements.
Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a bending pad 20 according to another embodiment of the present invention; fig. 5 is a schematic structural view of a bending portion 22 of a bending pad 20 in a bent state according to another embodiment of the present invention.
In some alternative embodiments, to facilitate the connection of the bending pad 20 to the flexible display substrate, the bending pad 20 may include a support base layer 202, and a first adhesive layer 201 and a second adhesive layer 203 respectively disposed on both side surfaces of the support base layer 202 in the thickness direction. When the bending cushion block 20 is placed in the accommodating cavity of the flexible display substrate, the first adhesive layer 201 and the second adhesive layer 203 are aligned, adhered and fixed with the flexible display substrate.
In some alternative embodiments, the incision 23 is formed in the first adhesive layer 201 and the support base layer 202, and the opening of the incision 23 is located on a side surface of the first adhesive layer 201 facing away from the support base layer 202; when the bending cushion block 20 is placed in the accommodating cavity of the flexible display substrate for use, the bending portion 22 is bent with the curvature of the first curved surface area 12, the cutting groove 23 is tightened to be attached to two inner surfaces of the cutting groove 23, the opening end of the cutting groove 23 is bonded through the first bonding layer 201, and the bending portion 22 is not prone to rebound and deformation.
Note the thickness H of the first adhesive layer 2011The thickness of the supporting base layer 202 is H2The depth of the cutting groove 23 at the first adhesive layer 201 is h1The depth of the portion of the cutting groove 23 on the support base layer 202 is h2And then:
h1＝H1，
h＝h1+h2＝H1+h2，
therefore, the temperature of the molten metal is controlled,
optionally, the thickness H of the first adhesive layer 201 is selected to ensure the support of the bending pad 201And the thickness H of the support base layer 2022Can be set to be 0.1 to 0.3, the thickness H of the second adhesive layer 2033And the thickness H of the support base layer 2022The ratio of (c) may be set to 0.1 to 0.3.
Optionally, the kerf 23 is at a depth h of the portion of the support substrate 2022Can be represented by the formula
h2＝κH2
Is determined in which H2Kappa is 0.4. ltoreq. kappa. ltoreq.0.6 for the thickness of the support base layer 202.
In some alternative embodiments, to facilitate bending of the bending portion 22 of the bending pad 20, the supporting base layer 202 may be a flexible substrate having elasticity, which is various, and the application is not limited thereto. Alternatively, the support substrate 202 may be made of polyethylene terephthalate (PET) or polyurethane.
The materials of the first adhesive layer 201 and the second adhesive layer 203 are various, and the present application does not specifically limit the materials. Optionally, the first adhesive layer 201 and the second adhesive layer 203 may be made of an acrylic adhesive, a silicone adhesive, or an acrylic adhesive.
In some alternative embodiments, because of the small size of the bending pad 20, to facilitate the machining of the slot 23, the bend 22 may be cut by laser to form the slot 23.
In addition, the embodiment of the invention also provides a display device, which comprises the display panel.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Also, different features that are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the drawings, the specification, and the claims.
Claims (10)
1. A bending cushion block is used for a display panel, the display panel comprises a flexible display substrate, the flexible display substrate comprises a plane area, a first curved area, a bending area, a second curved area and an edge area which are arranged in sequence, the plane area, the first curved area, the bending area, the second curved area and the edge area are enclosed to form a containing cavity, and the bending cushion block is characterized in that,
the cushion of bending set up in use in holding the cavity, the cushion of bending is flexible substrate, the cushion of bending has the plane portion that distributes in succession and the portion of bending on self width direction, the portion of bending is in hold in the cavity with the curvature of first curved surface district is crooked, at least the portion of bending has a plurality of slots that set up at an interval each other on the width direction of the portion of bending, the slot is followed the length direction of the cushion of bending extends and the opening is located a lateral surface on the cushion thickness direction of bending, the slot be by width reduction shape recess on opening to self bottom direction.
2. The dog pad of claim 1, wherein the slot has a depth in a thickness direction of the dog pad that is less than a thickness of the dog pad.
3. The bending cushion block according to claim 2, wherein the cross section of the cutting groove in the direction from the opening to the bottom of the cutting groove is in a V shape, the cutting groove has two inner surfaces connected by a preset included angle, and the two inner surfaces are aligned and attached to each other in the bending process of the bending portion, so that the radians of the two arc-shaped surfaces of the bending portion are respectively matched with the radians of the first curved surface area and the second curved surface area.
4. The cushion block of claim 3, wherein the number n of slots is given by the formula
It is determined that,
a is a bending angle of the bending portion when the bending portion is bent by the curvature of the first curved surface area, alpha is an included angle between two inner surfaces of the cutting groove, H is the depth of the cutting groove, l is the opening width of the cutting groove on the surface of the bending portion, n is more than or equal to 2 and less than or equal to 6, alpha is more than or equal to 0 and less than or equal to 45 degrees, A is more than 0 and less than or equal to 90 degrees, H is more than 0 and less than or equal to 0.75H, H is the thickness of the bending cushion block, and the units of l, H and H are consistent.
5. The cushion block of any one of claims 2 to 4, wherein the cushion block comprises a support base layer, a first adhesive layer and a second adhesive layer respectively provided on both side surfaces of the support base layer in a thickness direction, and the cutting groove is provided in the first adhesive layer and the support base layer;
preferably, the thickness H of the first pasting layer1And the thickness H of the supporting base layer2The thickness H of the second adhesive layer3And the thickness H of the supporting base layer2The ratio of (A) to (B) is 0.1-0.3;
preferably, the incision is located at a depth h of a portion of the support substrate2From the formula h2＝κH2Is determined in which H2Kappa is more than or equal to 0.4 and less than or equal to 0.6 for the thickness of the supporting base layer.
6. The bend pad of claim 5, wherein the material of the support substrate is polyethylene terephthalate or polyurethane; the first layer of pasting with the material of layer is sub-sensitive glue or silica gel or ya keli glue is pasted to the second.
7. The cushion block of claim 1, wherein the undercut is laser cut to shape.
8. A display panel, comprising:
the flexible display substrate comprises a plane area, a first curved area, a bending area, a second curved area and an edge area which are arranged in sequence, wherein the plane area, the first curved area, the bending area, the second curved area and the edge area are encircled to form a containing cavity;
a bend pad disposed within the receiving cavity and curved at the curvature of the first curved surface region, the bend pad being as in any one of claims 1-7.
9. The display panel of claim 8, wherein the display panel further comprises a cover plate, the cover plate comprises a planar plate body and a curved plate body on at least one side of the planar plate body, the planar area of the flexible display substrate is attached to the planar plate body of the cover plate, and the first curved area of the flexible display substrate is attached to the curved plate body of the cover plate.
10. A display device characterized by comprising the display panel according to claim 8 or 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010603802.7A CN113936549A (en) | 2020-06-29 | 2020-06-29 | Bent cushion block, display panel and display device |
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| CN202010603802.7A CN113936549A (en) | 2020-06-29 | 2020-06-29 | Bent cushion block, display panel and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114694506A (en) * | 2022-03-18 | 2022-07-01 | 武汉华星光电半导体显示技术有限公司 | Display device |
| CN115188268A (en) * | 2022-06-22 | 2022-10-14 | 广州国显科技有限公司 | Flexible display screen supporting component, flexible display component and folding display terminal |
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| CN114694506B (en) * | 2022-03-18 | 2023-11-28 | 武汉华星光电半导体显示技术有限公司 | display device |
| CN115188268A (en) * | 2022-06-22 | 2022-10-14 | 广州国显科技有限公司 | Flexible display screen supporting component, flexible display component and folding display terminal |
| CN115188268B (en) * | 2022-06-22 | 2023-10-20 | 广州国显科技有限公司 | Flexible display screen supporting assembly, flexible display assembly and folding display terminal |
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