CN113140158B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113140158B CN113140158B CN202110368509.1A CN202110368509A CN113140158B CN 113140158 B CN113140158 B CN 113140158B CN 202110368509 A CN202110368509 A CN 202110368509A CN 113140158 B CN113140158 B CN 113140158B
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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 provides a display panel and a display device; the display panel comprises a display panel body, a back plate and an auxiliary supporting layer, wherein a non-bending area of the display panel body is bent to a non-light-emitting side of the display panel body through a bending area; the back plate is attached to the non-light-emitting side of the display panel body, a first part of the back plate is arranged in the display area, and a second part of the back plate is arranged in the non-bending area; the auxiliary supporting layer is arranged on one side of the first part of the back plate, which is far away from the display panel body, and is connected with the second part of the back plate; the auxiliary supporting layer comprises a first sub-functional layer and a second sub-functional layer, the first sub-functional layer exceeds the first part of the backboard, extends towards the bending area of the display panel body or extends and is reversely folded to one side, away from the first part of the backboard, of the second sub-functional layer, so that the first sub-functional layer and the first part of the backboard support the bending fixed end of the display panel body, and the problem that the supporting effect of the supporting film is poor in the bending fixed end of the AMOLED display screen is solved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
An Active Matrix Organic Light Emitting Diode (AMOLED) display screen has the characteristics of self-luminescence, wide viewing angle, short response time, high luminance, wide color gamut, low working voltage, flexibility and the like, and is considered as a novel display device with the most potential. The Flexible AMOLED display screen can reversely fold structures such as fan-out (Fanout) wiring, binding (binding) areas, Flexible printed Circuit boards (FPCs) and the like to the back side of the display screen body through a Pad bending (Pad binding) process and fix the structures so as to reduce the size of a lower frame and realize high screen occupation ratio.
However, as the display screen is developed towards the direction of thinning, the thickness of the supporting film structure on the back side of the flexible AMOLED display screen is also reduced, and the supporting effect of the film material at the bending fixed end in the Pad bonding process is greatly tested. The smaller the thickness of the membrane material is, the lower the rigidity is, the poorer the supporting effect of the bending fixed end is, and the screen body of the fixed end is easy to collapse and deform during bending to cause the circuit fracture of the area.
Therefore, the technical problem that the support film at the bent fixed end of the AMOLED display screen is poor in support effect needs to be solved.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for solving the technical problem that a bent fixed end of an existing AMOLED display screen is poor in supporting effect of a supporting film.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the embodiment of the invention provides a display panel, which comprises a display panel body, a back plate and an auxiliary supporting layer, wherein the display panel body comprises a display area and a non-display area, the non-display area is divided into a bending area and a non-bending area, the bending area is positioned between the display area and the non-bending area, and the non-bending area is bent to the non-light-emitting side of the display panel body through the bending area; the back plate is attached to the non-light-emitting side of the display panel body and comprises a first part back plate and a second part back plate which are oppositely arranged, the first part back plate is arranged in the display area, and the second part back plate is arranged in the non-bending area; the auxiliary supporting layer is arranged on one side, far away from the display panel body, of the first part of back plate and is connected with the second part of back plate; wherein the auxiliary support layer comprises a first sub-functional layer that extends beyond the first portion of the backsheet and towards the inflection zone.
In the display panel provided in the embodiment of the present invention, the auxiliary support layer further includes:
a first adhesive layer disposed between the first partial backsheet and the first sub-functional layer for adhering the first partial backsheet and the first sub-functional layer;
the second sub-functional layer is arranged between the first sub-functional layer and the second partial back plate;
wherein the first adhesive layer and the first sub-functional layer together extend beyond the first partial backsheet and towards the inflection zone.
In the display panel provided in the embodiment of the present invention, the auxiliary support layer further includes a second adhesive layer, and the second adhesive layer is disposed between the second sub-functional layer and the second partial backplane, and is used to adhere the second partial backplane and the second sub-functional layer.
In the display panel provided in the embodiment of the present invention, the first sub-functional layer and the first adhesive layer extend toward the bending region and are folded back to a side of the second sub-functional layer away from the first sub-functional layer.
In the display panel provided in the embodiment of the present invention, the first sub-functional layer and the first adhesive layer are provided with stress relief portions at the bending start end and the bending end, and the stress relief portions are used for reducing the bending stress of the first sub-functional layer and the first adhesive layer.
In the display panel provided in the embodiment of the present invention, the first adhesive layer is broken at a portion corresponding to the bending region.
In the display panel provided by the embodiment of the invention, the second sub-functional layer includes one of a copper foil, a first stainless steel and a copper foil composite film.
In the display panel provided in the embodiment of the present invention, the first sub-functional layer includes second stainless steel, and the first sub-functional layer extends beyond the first partial backplane toward the bending region and is folded back to a side of the first sub-functional layer away from the first partial backplane.
In the display panel provided in the embodiment of the present invention, a gap is formed between the first sub-functional layer and the bending region.
An embodiment of the present invention further provides a display device, which includes the display panel of one of the foregoing embodiments.
The invention has the beneficial effects that: according to the display panel and the display device, the first sub-functional layer exceeds the first partial backboard, extends towards the display panel body bending area or extends and is reversely folded to one side, away from the first partial backboard, of the second sub-functional layer, so that the first sub-functional layer and the first partial backboard support the bending fixed end of the display panel body, the problem that the supporting film supporting effect of the bending fixed end of the conventional AMOLED display screen is poor is solved, and the phenomenon that the bending fixed end collapses and deforms when the AMOLED display screen is bent to cause line breakage of the area is avoided; meanwhile, the first sub-functional layer is extended or extended and folded, so that a suspension area formed in the bending area of the display panel body can be filled, and the deformation resistance of the bending area of the display panel body is improved.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a display panel before bending according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a display panel after being bent according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a display panel after bending according to an embodiment of the invention.
Fig. 4 is a schematic cross-sectional view of a display panel after being bent according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a display panel after being bent according to an embodiment of the present invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals. In the drawings, the thickness of some layers and regions are exaggerated for clarity of understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily illustrated, but the present invention is not limited thereto.
Referring to fig. 1 and fig. 2 in combination, fig. 1 is a schematic cross-sectional structure of a display panel before being bent according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional structure of the display panel after being bent according to an embodiment of the present invention. The display panel 100 includes a display panel body 10, a back plate 20 and an auxiliary support layer 30, the display panel body 10 includes a display area AA and a non-display area, the non-display area is divided into a bending area PB and a non-bending area NB, the bending area PB is located between the display area AA and the non-bending area NB, and the non-bending area NB is bent to a non-light-emitting side of the display panel body 10 through the bending area PB to reduce a frame width of the display panel 100, thereby realizing a narrow frame or no frame. The non-light-emitting side of the display panel body 10 is the side opposite to the light-emitting side of the display panel body 10, and the light-emitting side of the display panel body 10 is the side of the display panel body 10 displaying the picture.
The display area AA of the display panel body 10 refers to a portion of the display panel body 10 for displaying a picture; the non-display area of the display panel body 10 refers to a portion of the display panel body 10 used for designing various external traces, driving circuits, and the like, wherein the bending area PB of the non-display area is designed with fan-out traces for connecting with signal traces in the display area AA; the non-bending region NB of the non-display region refers to a portion of the display panel body 10 for designing the flexible printed circuit board and binding the driver 70.
Optionally, the display panel 100 further includes a protective layer 40, and the protective layer 40 includes UV glue or the like. The protection layer 40 covers the bending area PB of the display panel body 10 and extends towards two ends of the bending area PB to protect fan-out traces of the bending area PB and prevent the bending area PB from breaking when bending.
The back plate 20 is attached to the non-light-emitting side of the display panel body 10, and includes a first portion back plate 21 and a second portion back plate 22, which are oppositely disposed, the first portion back plate 21 is disposed in the display area AA, and the second portion back plate 22 is disposed in the non-bending area NB. The back plate 20 is disposed on the non-light-emitting side of the display panel body 10, and is used for supporting the display panel body 10, and the back plate 20 is broken in a region corresponding to the bending region PB to form the first partial back plate 21 and the second partial back plate 22. After the non-bending region NB is bent to the non-light-emitting side of the display panel body 10, the first partial back plate 21 and the second partial back plate 22 are opposite to each other, and the ends of the first partial back plate 21 and the second partial back plate 22 facing the bending region PB are flush.
Alternatively, the material of the back sheet 20 includes polyethylene terephthalate (PET) or the like.
The auxiliary supporting layer 30 is disposed on a side of the first portion of the back plate 21 away from the display panel body 10, and after the non-bending region NB of the display panel body 10 is bent to the back side of the display panel body 10 along the bending region PB, the auxiliary supporting layer 30 is further connected to the second portion of the back plate 22. The auxiliary support layer 30 includes a first sub-functional layer 31, and the first sub-functional layer 31 extends beyond the first partial backplane 21 and toward the bending region PB, so that the first sub-functional layer 31 and the first partial backplane 21 together support the bending fixed end of the display panel body 10.
The bending fixed end of the display panel body 10 refers to a horizontal area connected to the bending start end of the bending area PB, and the display panel body 10 in this area is subjected to a large bending stress, and needs to provide sufficient supporting force for the first portion of the back plate 21 in the corresponding area to prevent the display panel body 10 in this area from collapsing and deforming to cause a circuit fracture in this area. The first sub-functional layer 31 of the embodiment of the invention supports the area together with the first partial backplane 21 by extension design, so as to provide sufficient supporting force for the display panel body 10 in the area.
Optionally, the non-display area further includes a bending transition area BB, where the bending transition area BB is a bending fixed end of the display panel body 10. The bending transition area BB is connected to the bending area PB and the display area AA, and is configured to enable the display panel body 10 to transition from the display area AA to the bending area PB smoothly, so as to reduce a risk that a film layer of the display panel body 10 is peeled off due to the fact that the bending area PB is too close to the display area AA.
In this embodiment, the first sub-functional layer 31 is designed to extend beyond the first partial backplane 21 and extend toward the bending region PB, so that the first sub-functional layer 31 and the first partial backplane 21 support the bending fixed end of the display panel body 10 together, thereby improving the supporting effect of the bending fixed end supporting film of the display panel 100.
In one embodiment, the auxiliary support layer 30 further comprises a second sub-functional layer 32, and the second sub-functional layer 32 is disposed between the first sub-functional layer 31 and the second partial backplane 22.
Specifically, the auxiliary support layer 30 further includes a first adhesive layer 33 and a second adhesive layer 34, and the first adhesive layer 33 is disposed between the first partial back sheet 21 and the first sub-functional layer 31, and is used for adhering the first partial back sheet 21 and the first sub-functional layer 31. Optionally, the first bonding layer 33 includes a bonding material such as grid glue, and the grid glue has the advantages of being easy to attach and capable of exhausting air, and can be attached by using the grid glue, so that undesirable phenomena such as bubbles and bulges can be avoided during attachment.
Optionally, the first adhesive layer 33 and the first sub-functional layer 31 both extend beyond the first partial back plate 21 and toward the bending region PB, so that the first adhesive layer 33, the first sub-functional layer 31 and the first partial back plate 21 both support the bent fixed end of the display panel body 10.
The second adhesive layer 34 is disposed between the second sub-functional layer 32 and the second partial backsheet 22 for adhering the second partial backsheet 22 and the second sub-functional layer 32. The second adhesive layer 34 includes a double-sided adhesive tape such as a composite tape, which may be a double-sided adhesive reinforcement (Stiffener), and the bending radius of the bending region PB may be adjusted by adjusting the height of the second adhesive layer 34.
Optionally, in the technical solution of this embodiment, the first sub-functional layer 31 includes a Foam material such as Foam (Foam), the Foam material has moderate mechanical strength and can be bent, and the bending performance is weaker than that of the display panel body 10, so that the Foam material is designed to extend beyond the first partial back plate 21 and extend toward the bending area PB, which can enhance the supporting force for the bending fixed end of the display panel 100, and avoid local stress integration thereof. Meanwhile, the foam has a good heat insulation effect, and the influence of heat generated during the operation of the driver 70 and the external wiring on the display area AA can be avoided.
Alternatively, the second sub-functional layer 32 includes a copper foil, a copper foil composite film, or the like. The copper foil composite film may be formed by laminating a Polyimide (PI) with a glue, a glue material, and a copper foil, and the PI in the copper foil composite film is mainly used to increase the overall rigidity of the auxiliary support layer 30, so as to increase the pressure resistance of the back of the display panel body 10. The copper foil has excellent conductive performance, can better realize the electromagnetic shielding effect, and simultaneously has better heat-conducting performance, can realize the quick heat transfer, transfers the heat in local high-temperature area to other places, and is convenient for the even distribution and the heat dissipation of heat.
Optionally, an end of the second sub-functional layer 32 close to the bending region PB is flush with the first partial backplane 21 or is retracted inward by a certain distance compared to the first partial backplane 21, so as to prevent the bending region PB of the display panel body 10 from contacting the second sub-functional layer 32 and being stabbed or squeezed when being bent or squeezed from the outside.
Since the material of the copper foil or the copper foil composite film of the second sub-functional layer 32 is hard, there may be burr curling when cutting edges, and if the bending portion PB contacts the first sub-functional layer 31, a puncture or a crush may be caused. The first sub-functional layer 31 extends beyond the first partial backplane 21 and toward the bending region PB, and when the bending region PB of the display panel body 10 is bent or pressed externally, the first sub-functional layer is firstly contacted with the first sub-functional layer 31, so that the bending region PB of the display panel body 10 is ensured not to be contacted with the second sub-functional layer 32.
Meanwhile, the first sub-functional layer 31 exceeds the first partial backplane 21 and extends toward the bending region PB, so that a suspended area formed by the bending region PB of the display panel body 10 is filled, and the suspended area is usually located at the bottom edge of the display panel 100, and the suspended area is easily subjected to external force to deform in environments such as transportation, system assembly, and complete machine test, so that line fracture causes poor drawing. The first sub-functional layer 31 of the embodiment of the present invention can fill the suspended space by extending, so as to enhance the anti-extrusion deformation capability of the region.
In addition, a gap is formed between the first sub-functional layer 31 and the bending region PB, that is, the first sub-functional layer 31 extends toward the bending region PB but does not contact with the bending region PB, so as to ensure natural arc forming of the bending region PB, and avoid a risk that the bending shape is changed due to the contact between the bending region PB of the display panel body 10 and the local part of the first sub-functional layer 31 when bending, thereby causing abnormal process.
Optionally, the auxiliary support layer 30 may further include a third sub-functional layer (not shown), where the third sub-functional layer includes graphite, and the graphite may uniformly distribute heat, avoid local heat concentration, and further improve the heat dissipation effect of the display panel 100.
It should be noted that the display panel 100 may further include a polarizer 50, a cover plate 60 and other structures disposed on the light exit side of the display panel body 10, and certainly, a third Adhesive layer 80 is further disposed between the polarizer 50 and the cover plate 60 for adhesion, where the third Adhesive layer 80 includes a transparent optical Adhesive (OCA) and the like. The polarizer 50 is disposed facing the light emitting surface of the display panel body 10, and when the external ambient light enters the display panel 100, the polarizer 50 can absorb a portion of the external ambient light, so as to prevent the external ambient light from being reflected by the metal wires inside the display panel body 10, thereby reducing the reflectivity and improving the contrast of the display panel 100.
Optionally, the display panel 100 of the present invention may further include a touch functional layer (not shown) disposed between the polarizer 50 and the display panel body 10, wherein the touch functional layer is directly disposed on the display panel body 10, and a DOT touch scheme is adopted to implement a touch function. Of course, the invention is not limited thereto, and the display panel 100 of the invention may also adopt an external touch scheme.
In an embodiment, please refer to fig. 3, and fig. 3 is a schematic cross-sectional structure diagram of a display panel after bending according to an embodiment of the present invention. Unlike the previous embodiments, the first sub-functional layer 31 and the first adhesive layer 33 of the display panel 101 of the present embodiment extend toward the bending region PB and are folded back to the side of the second sub-functional layer 32 away from the first sub-functional layer 31.
Specifically, the first sub-functional layer 31 and the first adhesive layer 33 extend toward the bending region PB and are folded back by 180 degrees, so that the folded-back portions of the first sub-functional layer 31 and the first adhesive layer 33 are parallel to the second sub-functional layer 32, that is, the folded-back portions of the first sub-functional layer 31 and the first adhesive layer 33 are parallel to the non-folded-back portions thereof, thereby simplifying the manufacturing process.
Optionally, the bending start ends and the bending tail ends of the first sub-functional layer 31 and the first adhesive layer 33 are provided with stress relief portions 311, and the stress relief portions 311 are used for reducing the bending stress of the first sub-functional layer 31 and the first adhesive layer 33. The stress relief portion 311 may be a slit formed by half-cutting a bending start end and a bending end of the first sub-functional layer 31 and the first adhesive layer 33, the slit penetrating the first adhesive layer 33 but not penetrating the first sub-functional layer 31. Of course, the present invention is not limited thereto, and the stress relief portion 311 of the present invention may also be formed by providing a special covering layer having a stress reducing function, such as UV glue, at the bending start end and the bending end of the first sub-functional layer 31 and the first adhesive layer 33.
Optionally, the first adhesive layer 33 is broken at a portion corresponding to the bending region PB, that is, the first adhesive layer 33 is removed at a region corresponding to the bending region PB of the display panel body 10, so that only the first sub-functional layer 31 is a film layer that is bent when the first sub-functional layer 31 and the first adhesive layer 33 are folded reversely, and the first sub-functional layer 31 is half-cut, so as to further reduce the bending stress of the first sub-functional layer 31. And the foam material of the first sub-functional layer 31 can be directly fixed on the first part back plate 21 through a glue layer, so that the fixing effect is stable, the problem of peeling off can not occur during bending, and the foam material has better toughness and can not break during bending.
In this embodiment, the same effect as that of the above embodiment can be achieved by extending the first sub-functional layer 31 and the first adhesive layer 33 toward the bending region PB and folding back to the side of the second sub-functional layer 32 away from the first sub-functional layer 31, and in this embodiment, by extending and folding back, the composite tape is not required to be arranged, so that the second partial back plate 22 is connected with the first sub-functional layer 31 by folding back the first adhesive layer 33 on the back side of the second sub-functional layer 32, and further, the non-bending region NB of the display panel body 10 is fixed to the auxiliary support layer 30. For other descriptions, please refer to the above embodiments, which are not repeated herein.
In an embodiment, please refer to fig. 4, and fig. 4 is a schematic cross-sectional structure diagram of a display panel after bending according to an embodiment of the present invention. Unlike the previous embodiments, the second sub-functional layer 32 'of the display panel 102 of the present embodiment includes a first stainless steel (e.g., SUS), and the auxiliary support layer 30' designed by the first stainless steel can enable the display panel 102 to meet the requirement of dynamic bending, and the first stainless steel can ensure the bending form of the display panel 102 during dynamic bending.
The differences between the present embodiment and the above embodiments will be specifically described below, and the same structures and the same functions will not be described again.
In particular, the first stainless steel is a patterned stainless steel with a relatively thick thickness, optionally the first stainless steel is more than 100 microns thick.
Further, in order to make the display panel 102 meet the dynamic bending requirement, the Adhesive layer between the first partial backplane 21, the first sub-functional layer 31, the second sub-functional layer 32', and the second partial backplane 22 needs to have high adhesion and low modulus characteristics, such as Optical Clear Adhesive (OCA), Pressure Sensitive Adhesive (PSA), and the like.
Optionally, the first and second adhesive layers 33 ', 34' each comprise OCA, PSA, or the like.
In an embodiment, referring to fig. 4, the first adhesive layer 33' and the first sub-functional layer 31 extend beyond the first partial back plate 21 towards the bending region PB, and a gap is formed between the first sub-functional layer 31 and the bending region PB. In this case, the second adhesive layer 34' is not provided as a composite tape having a reinforcing member (Stiffener) for adjusting the bending radius of the bending region PB, because the first stainless steel having a relatively large thickness can effectively control the bending radius of the bending region PB. Therefore, the first adhesive layer 33 'and the second adhesive layer 34' may be made of the same adhesive material.
In another embodiment, one of the first adhesive layer and the first sub-functional layer extends beyond the first partial backsheet towards the inflection zone and is folded back to the backside of the second sub-functional layer with a gap between the first sub-functional layer and the inflection zone. At this time, the second adhesive layer is not required to be arranged, the second part of the back plate is connected with the first sub-functional layer through the first adhesive layer which is folded to the back side of the second sub-functional layer, and then the non-bending area of the display panel body is fixed on the auxiliary supporting layer.
Of course, this embodiment may also refer to the above embodiments, and stress relief portions are provided at the bending start ends and the bending end ends of the first sub-functional layer and the first adhesive layer, or the first adhesive layer is removed in the region corresponding to the bending region. For other descriptions, please refer to the above embodiments, which are not repeated herein.
In an embodiment, please refer to fig. 5, and fig. 5 is a schematic cross-sectional structure diagram of a display panel after bending according to an embodiment of the present invention. Different from the above embodiment, the first sub-functional layer 31' of the display panel 103 comprises a second stainless steel, and the auxiliary support layer 30 ″ designed by using the second stainless steel can make the display panel 103 meet the requirement of dynamic bending. The first sub-functional layer 31 ' extends beyond the first partial backsheet 21 toward the bending region PB and is folded back to a side of the first sub-functional layer 31 ' away from the first partial backsheet 21, and a gap is formed between the first sub-functional layer 31 ' and the bending region PB.
In particular, the second stainless steel is a full-face design stainless steel with a relatively thin thickness, optionally the second stainless steel has a thickness of less than 40 microns.
Optionally, the first adhesive layer 33 ″ includes OCA, etc., the first sub-functional layer 31 ' is attached to the first partial back plate 21 by the OCA glue, and after the first sub-functional layer 31 ' is extended and folded back, the second partial back plate 22 is connected to the folded-back first sub-functional layer 31 ' by the folded-back first adhesive layer 33 ″, so that a second adhesive layer is not required.
Of course, this embodiment may also refer to the above-mentioned embodiment, and the stress relief portions 311' are provided at the bending start end and the bending end of the first adhesive layer 33 ", or the first adhesive layer 33" is removed in the region corresponding to the bending region PB. For other descriptions, please refer to the above embodiments, which are not repeated herein.
The embodiment of the invention also provides a display device which comprises the display panel in one of the embodiments, a circuit board bound on the display panel and other devices.
According to the above embodiment:
the invention provides a display panel and a display device, wherein the display panel comprises a display panel body, a back plate and an auxiliary supporting layer, wherein a non-bending area of the display panel body is bent to a non-light-emitting side of the display panel body through a bending area; the back plate is attached to the non-light-emitting side of the display panel body and comprises a first part back plate and a second part back plate which are oppositely arranged, the first part back plate covers the display area, and the second part back plate covers the non-bending area; the auxiliary supporting layer is arranged on one side of the first part of the back plate, which is far away from the display panel body, and is connected with the second part of the back plate; the auxiliary supporting layer comprises a first sub-functional layer and a second sub-functional layer, the first sub-functional layer exceeds the first part of the backboard, extends towards the bending area of the display panel body or extends and is reversely folded to one side, away from the first part of the backboard, of the second sub-functional layer, so that the first sub-functional layer and the first part of the backboard support the bending fixed end of the display panel body, the problem that the supporting effect of a supporting film is poor at the bending fixed end of the AMOLED display screen is solved, and the phenomenon that the bending fixed end collapses and deforms to cause line breakage in the area when the AMOLED display screen is bent is avoided. Meanwhile, the first sub-functional layer is extended or extended and folded reversely, so that a suspension area formed in the bending area of the display panel body can be filled, and the deformation resistance of the bending area of the display panel body is improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (9)
1. A display panel, comprising:
the display panel comprises a display panel body and a non-display area, wherein the non-display area is divided into a bending area and a non-bending area, the bending area is positioned between the display area and the non-bending area, and the non-bending area is bent to the non-light-emitting side of the display panel body through the bending area;
the back plate is attached to the non-light-emitting side of the display panel body and comprises a first part of back plate and a second part of back plate which are oppositely arranged, the first part of back plate is arranged in the display area, and the second part of back plate is arranged in the non-bending area; and
the auxiliary supporting layer is arranged on one side, far away from the display panel body, of the first part of back plate and is connected with the second part of back plate;
the auxiliary support layer comprises a first sub-functional layer, the first sub-functional layer exceeds the first part of the back plate, extends towards the bending area, and is bent to one side, away from the first part of the back plate, of the first sub-functional layer, and a gap is formed between the first sub-functional layer and the bending area.
2. The display panel of claim 1, wherein the auxiliary support layer further comprises:
a first adhesive layer disposed between the first partial backsheet and the first sub-functional layer for adhering the first partial backsheet and the first sub-functional layer;
the second sub-functional layer is arranged between the first sub-functional layer and the second partial back plate;
wherein the first adhesive layer and the first sub-functional layer together extend beyond the first partial backsheet and towards the inflection zone.
3. The display panel of claim 2, wherein the auxiliary support layer further comprises a second adhesive layer disposed between the second sub-functional layer and the second partial backplane for adhering the second partial backplane and the second sub-functional layer.
4. The display panel of claim 2 wherein the first sub-functional layer and the first adhesive layer extend toward the inflection zone and are folded back to a side of the second sub-functional layer away from the first sub-functional layer.
5. The display panel according to claim 4, wherein bending start ends and bending end ends of the first sub-functional layer and the first adhesive layer are provided with stress relief portions for reducing bending stress of the first sub-functional layer and the first adhesive layer.
6. The display panel according to claim 4, wherein the first adhesive layer is broken at a portion corresponding to the bending region.
7. The display panel of claim 2, wherein the second sub-functional layer comprises one of a copper foil, a first stainless steel, a copper foil composite film.
8. The display panel of claim 1, wherein the first sub-functional layer comprises a second stainless steel.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| CN113436530B (en) * | 2021-06-16 | 2022-05-03 | 武汉华星光电半导体显示技术有限公司 | Display module, manufacturing method thereof and display device |
| CN113555408B (en) * | 2021-07-21 | 2024-05-24 | 京东方科技集团股份有限公司 | Display device, display module and manufacturing method thereof |
| CN113707030A (en) * | 2021-09-09 | 2021-11-26 | 武汉华星光电半导体显示技术有限公司 | Flexible display module and display terminal |
| CN113707031A (en) | 2021-09-10 | 2021-11-26 | 武汉华星光电半导体显示技术有限公司 | Display module and display device |
| CN114122081B (en) * | 2021-11-05 | 2023-07-25 | 武汉华星光电半导体显示技术有限公司 | Display device |
| CN114078393B (en) * | 2021-11-19 | 2024-01-23 | 京东方科技集团股份有限公司 | Backboard and display module |
| CN114038892B (en) * | 2021-11-24 | 2023-07-04 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN118038759A (en) * | 2022-02-11 | 2024-05-14 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
| CN115116336B (en) * | 2022-07-19 | 2023-10-31 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
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| US9304538B2 (en) * | 2012-12-13 | 2016-04-05 | Nokia Technologies Oy | Display apparatus and associated method |
| CN106940966B (en) * | 2017-05-17 | 2019-07-05 | 京东方科技集团股份有限公司 | Display screen module and electronic equipment |
| CN108877519B (en) * | 2018-06-26 | 2020-10-23 | 上海天马微电子有限公司 | Display device |
| JP7094837B2 (en) * | 2018-08-29 | 2022-07-04 | 株式会社ジャパンディスプレイ | Display device, flexible wiring board, and manufacturing method of display device |
| CN109285461B (en) * | 2018-11-30 | 2020-07-17 | 云谷（固安）科技有限公司 | Display panel and display device |
| CN110570764A (en) * | 2019-08-23 | 2019-12-13 | 武汉华星光电半导体显示技术有限公司 | display panel and manufacturing method thereof |
| CN110942720B (en) * | 2019-11-21 | 2022-01-04 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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