CN113570966A - Display device and spliced screen - Google Patents
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- CN113570966A CN113570966A CN202110771317.5A CN202110771317A CN113570966A CN 113570966 A CN113570966 A CN 113570966A CN 202110771317 A CN202110771317 A CN 202110771317A CN 113570966 A CN113570966 A CN 113570966A
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- 239000010410 layer Substances 0.000 claims abstract description 127
- 238000005452 bending Methods 0.000 claims abstract description 73
- 230000008093 supporting effect Effects 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims description 27
- 239000003292 glue Substances 0.000 claims description 25
- 230000017525 heat dissipation Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 5
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- 239000006059 cover glass Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 3
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
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- 229910052738 indium Inorganic materials 0.000 description 1
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- 150000004706 metal oxides Chemical class 0.000 description 1
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Images
Classifications
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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
- G09F9/302—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 characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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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
Abstract
The embodiment of the invention provides a display device and a spliced screen, wherein the display device comprises: the flexible display panel comprises a display part, a binding part and a bending part positioned between the display part and the binding part; the binding part is positioned on the opposite side of the display part and is connected with the display part through an adhesive layer, the adhesive layer comprises a first adhesive layer, a supporting layer and a second adhesive layer, and the hardness of the supporting layer is greater than that of the first adhesive layer and that of the second adhesive layer. The display device and the splicing screen disclosed by the invention can effectively reduce the deformation of the bonding layer at the connecting binding part and the display part, enhance the capability of the bonding layer of the flexible display panel in resisting the deformation of the bonding layer caused by the external environment in the use process, improve the bending stability of the flexible display panel, ensure the stability of the splicing gap between the display devices and improve the display effect of the splicing screen.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device and a spliced screen.
Background
Micro light emitting diode (Micro-LED) display technology reduces the pixel distance from millimeter to micron by integrating a high-density Micro-sized LED array on one chip. The Micro-LED display technology is considered as a new generation of display technology because of its advantages of self-luminescence, small size, light weight, high brightness, longer lifetime, lower power consumption, faster response time, and higher controllability.
An important application field of the Micro-LED is large-size display, but due to the limitation of the existing transfer equipment and the transfer yield, the large-size Micro-LED display is mainly realized by splicing a plurality of Micro-LED flexible display devices, and the Micro-LED flexible display devices can effectively reduce the splicing gap by bending the binding part on the back side of the display part, so that the display effect of the spliced screen is improved. Therefore, ensuring the bending stability of each Micro-LED flexible display device and controlling the splicing gap of each Micro-LED flexible display device are very important.
However, in the Micro-LED flexible display device in the prior art, the display part and the binding part on two sides of the bending part of the Micro-LED flexible display device are bonded by using a colloid with a polymer as a base material, and when the binding part is bent to the opposite side of the display part along the bending part and the binding part is fixedly connected with the display part, the colloid with the polymer as the base material deforms, so that the actual bending radius is difficult to reach the required bending radius; and the polymer used as the colloid of the base material has poor stability in high temperature and high humidity, the conditions of reduced adhesion and increased deformation effect can occur, and the bending stability can not be ensured.
Disclosure of Invention
The embodiment of the invention provides a display device and a splicing screen, which can solve the problems of poor colloid deformation and poor stability of a display part and a binding part which are bonded in a conventional flexible display panel.
An embodiment of the present invention provides a display device, including:
the flexible display panel comprises a display part, a binding part and a bending part positioned between the display part and the binding part;
the binding part is positioned on the opposite side of the display part and is connected with the display part through an adhesive layer, the adhesive layer comprises a first adhesive layer, a supporting layer and a second adhesive layer, and the hardness of the supporting layer is greater than that of the first adhesive layer and that of the second adhesive layer.
Optionally, the thickness of the support layer is at least twice as large as that of the first glue layer or the second glue layer.
Optionally, the first adhesive layer and the second adhesive layer have the same thickness.
Optionally, the thickness of the bonding layer is less than or equal to 0.4 mm.
Optionally, the thicknesses of the first adhesive layer and the second adhesive layer are both 0.05mm to 0.1 mm; the thickness of the support layer is 0.2mm to 0.3 mm.
Optionally, the flexible display panel further includes a flexible substrate, a driving circuit layer, and a light emitting layer, which are sequentially stacked, the flexible substrate and the driving circuit layer are disposed on the display portion, the bending portion, and the binding portion, and the light emitting layer is disposed on the display portion;
the flexible display panel further comprises a protection adhesive layer arranged on the driving circuit layer on the bending portion, and the thickness of the protection adhesive layer is smaller than that of the first adhesive layer or the second adhesive layer.
Optionally, the flexible display panel further includes a heat dissipation layer located on one side of the flexible substrate away from the driving circuit layer, the heat dissipation layer is disposed on the display portion, and the thickness of the bonding layer is 10 times to 20 times that of the heat dissipation layer.
Optionally, a vertical projection of the heat dissipation layer on the display portion overlaps with a vertical projection of the adhesive layer on the display portion;
the first glue film in the bonding layer is fixedly connected with the heat dissipation layer of the display portion, the second glue film in the bonding layer is fixedly connected with the flexible substrate of the binding portion, and the thickness of the bonding layer is smaller than the bending diameter of the bending portion.
Optionally, a vertical projection of the heat dissipation layer on the display portion is not overlapped with a vertical projection of the adhesive layer on the display portion;
wherein, a first glue layer in the bonding layer is fixedly connected with the flexible substrate of the binding part; and a second adhesive layer in the adhesive layer is fixedly connected with the flexible substrate of the display part, and the thickness of the adhesive layer is equal to the bending diameter of the bending part.
Optionally, the shape of the bent portion is a semicircular arc.
Optionally, the supporting layer is made of glass; the first adhesive layer is made of acrylate or polyurethane, and the second adhesive layer is made of acrylate or polyurethane.
Optionally, the first adhesive layer and the second adhesive layer are made of the same material.
Optionally, the viscosity of the first adhesive layer and the second adhesive layer is greater than 9.8N/cm.
Correspondingly, the embodiment of the invention provides a spliced screen, which comprises a plurality of display devices as described in any one of the above, wherein the plurality of display devices are arranged in an array, and the splicing gap between any two adjacent display devices is less than or equal to 0.2 mm.
According to the display device and the splicing screen disclosed by the invention, the bonding layer for connecting the binding part and the display part is set to be a composite structure comprising the first adhesive layer, the supporting layer and the second adhesive layer, and the hardness of the supporting layer is greater than that of the first adhesive layer and the second adhesive layer, so that the deformation quantity of the bonding layer for connecting the binding part and the display part can be effectively reduced, the capability of the bonding layer of the flexible display panel in resisting the deformation of the bonding layer caused by the external environment in the use process is enhanced, the bending stability of the flexible display panel is improved, the stability of splicing gaps among the display devices is ensured, and the display effect of the splicing screen is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the disclosure;
fig. 2 to fig. 10 are schematic views illustrating a manufacturing process of a display device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to another embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials. The following are detailed below, and it should be noted that the order of description of the following examples is not intended to limit the preferred order of the examples.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the disclosure. As shown in fig. 1, an embodiment of the present invention discloses a display device, including:
a flexible display panel including a display part 10, a binding part 30, and a bending part 20 between the display part 10 and the binding part 30;
the binding portion 30 is bent to the opposite side of the display portion 10 along the bending portion 20, and is connected to the display portion 10 through an adhesive layer 40, the adhesive layer 40 includes a first adhesive layer 41, a support layer 42 and a second adhesive layer 43, and the hardness of the support layer 42 is greater than the hardness of the first adhesive layer 41 and the second adhesive layer 43.
The flexible Display panel may be a flexible Micro-LED Display panel, a flexible small-sized Light Emitting Diode (Mini-LED) Display panel, a flexible Organic Light Emitting Diode (OLED) Display panel, or a flexible Liquid Crystal Display (LCD) panel. That is, the present embodiment does not limit the type of the flexible display panel in the display device, and the adhesive layer 40 disclosed in the present embodiment may be applied as long as the flexible display panel has the binding portion 30 bent to the opposite side of the display portion 10, and the binding portion 30 and the display portion 10 are connected by the adhesive.
The following description takes the flexible display panel as a flexible Micro-LED display panel as an example, and the flexible Micro-LED display panel includes: a display part 10, a binding part 30, and a bending part 20 between the display part 10 and the binding part 30.
The display part 10 is provided with a Micro-LED light emitting unit for displaying an image, and the Micro-LED light emitting unit may include: the Micro-LED lighting unit may further include, for example, a white lighting unit or lighting units of other colors in addition to the red lighting unit, the green lighting unit and the blue lighting unit, which is not limited in this embodiment.
The binding portion 30 is provided with a binding terminal, and the display device further includes a Chip On Film (COF) 50 and a Printed Circuit Board (PCB) 60, and the binding terminal is electrically bound with the Printed circuit board 60 through the COF 50.
The bending part 20 is disposed between the display part 10 and the binding part 30, the bending part 20 is used for bending the binding part 30 to the opposite side of the display part 10, so as to reduce the frame of the flexible display panel and achieve the effect of a narrow frame, the bending part 20 may be arc-shaped, and the bending radius of the arc is less than or equal to 0.2 mm.
Specifically, the binding part 30 is located at the opposite side of the display part 10, and is connected to the display part 10 by an adhesive layer 40. The adhesive layer 40 is a laminated composite structure, and specifically includes a first adhesive layer 41, a support layer 42 and a second adhesive layer 43 which are laminated, wherein the first adhesive layer 41 in the adhesive layer 40 is fixedly connected with the binding portion 30; the second adhesive layer 43 of the adhesive layer 40 is fixedly connected to the display portion 10, and the hardness of the first adhesive layer 41 and the support layer 42 of the display portion 10 is greater than the hardness of the first adhesive layer 41 and the second adhesive layer 43.
Since the hardness of the support layer 42 is greater than the hardness of the first adhesive layer 41 and the second adhesive layer 43, when the bonding portion 30 of the flexible display panel is bent to the opposite side of the display portion 10 by the bending portion 20, the support layer 42 can effectively support the first adhesive layer 41 and the second adhesive layer 43 on the support layer 42, and compared with a glue using a polymer as a base material in the prior art, the bonding layer 40 in the embodiment of the invention can effectively prevent deformation of the glue bonding the display portion 10 and the bonding portion 30, and enhance stability.
Preferably, the material of the support layer 42 is glass; the first adhesive layer 41 and the second adhesive layer 43 are made of acrylate or polyurethane. The glass supporting layer 42 can be tightly combined with an adhesive layer formed by acrylate or polyurethane materials and provides a good supporting effect for the adhesive layer, in addition, the glass material is a conventional material in the manufacturing process of the flexible display panel, the flexible display panel is manufactured on a glass substrate in the early stage, and the glass material is adopted as the supporting layer 42, so that the material cost can be saved, and the material list can be simplified; and the adhesive layer of acrylate or polyurethane material is more excellent in chemical stability and deformation resistance than the adhesive layer of polymer as a base material, and does not require a photo-curing process after being coated on the supporting layer 42, the manufacturing process is convenient, and the adhesive layer can further prevent the adhesive deformation of the display part 10 and the binding part 30 and enhance the stability.
Further, in order to ensure the adhesive layer and the adhesive stability of the support layer 42, the display part 10 and the support part and save material cost, the viscosity of the first adhesive layer 41 and the second adhesive layer 43 is greater than 9.8N/cm, and the first adhesive layer 41 and the second adhesive layer 43 are made of the same material.
In this embodiment, the thickness of the support layer 42 is at least twice as thick as the first adhesive layer 41 or the second adhesive layer 43. Through controlling the thickness of the supporting layer 42 to be more than two times of the thickness of the first glue layer 41 or the second glue layer 43, the adhesive layer 40 can be bonded and fixed with the display part 10 and the binding part 30, and the thickness of the glue layers can be compressed as much as possible, so that the amount of colloid deformation is effectively reduced, and the bending stability of the flexible display panel is improved.
Preferably, the thickness of the first adhesive layer 41 is the same as that of the second adhesive layer 43, so that only one adhesive layer with one thickness is required to be prepared when the adhesive layer 40 is prepared, thereby reducing the production cost and the process difficulty.
In the present embodiment, the bending angle of the bending portion 20 is, for example, 165 ° to 180 °, and the binding portion 30 is relatively parallel to the display portion 10. Preferably, the bending angle of the bent portion 20 is 180 °, that is, the bent portion 20 forms a regular semicircular arc, the minimum distance between the binding portion 30 and the display portion 10 is equal to the bending diameter d of the bent portion 20, and the thickness of the adhesive layer 40 is smaller than the bending diameter of the bent portion 20.
In this embodiment, the flexible display panel further includes a flexible substrate 100, a driving circuit layer 200, a light emitting layer 300, an Optical Clear Adhesive (OCA) thin film encapsulation layer 400, and a Cover Glass (CG) 700 including a Black Matrix (BM) 600, which are sequentially stacked, wherein the flexible substrate 100 and the driving circuit layer 200 are disposed on the display portion 10, the bending portion 20, and the binding portion 30, and the light emitting layer 300, the OCA thin film encapsulation layer 400, and the Cover Glass 700 including the Black Matrix 600 are disposed on the display portion 10; the flexible display panel further includes a protection adhesive layer 500, the protection adhesive layer 500 is disposed on the driving circuit layer 200 of the bending portion 20, and the thickness of the protection adhesive layer 500 is smaller than the thickness of the first adhesive layer 41 or the second adhesive layer 43. The protective adhesive layer 500 is formed of, for example, a photo-curable adhesive layer with excellent bending performance, and the protective adhesive layer 500 has a thinner thickness than the first adhesive layer 41 and the second adhesive layer 43, and can prevent the metal wires in the bending part 20 from being broken or short-circuited due to bending stress. Preferably, the protective adhesive layer 500 partially covers the binding portion 30 in addition to completely covering the bending portion 20.
Further, the flexible display panel further includes a heat dissipation layer 800 located on a side of the flexible substrate 100 away from the driving circuit layer 200, the heat dissipation layer 800 is disposed on the display portion 10, and the heat dissipation layer 800 is configured to transmit heat generated by the driving circuit layer 200 and the light emitting layer 300 in the display portion 10 to an outside of the flexible display panel. Wherein the thickness of the adhesive layer 40 is 10 to 20 times the thickness of the heat dissipation layer 800.
In an alternative embodiment of the present application, a vertical projection of the heat dissipation layer 800 on the display portion 10 overlaps a vertical projection of the adhesive layer 40 on the display portion 10; the first adhesive layer 41 of the adhesive layer 40 is fixedly connected to the heat dissipation layer 800 of the display portion 10, and the second adhesive layer 43 of the adhesive layer 40 is fixedly connected to the flexible substrate 100 of the binding portion 30. When the bending angle of the bent portion 20 is 180 °, the sum of the thicknesses of the adhesive layer 40 and the heat dissipation layer 800 is equal to the bending diameter d of the bent portion 20, and the thickness of the adhesive layer 40 is smaller than the bending diameter d of the bent portion 20.
In this embodiment, in order to reduce the frame area of the flexible display panel and ensure the splicing effect when a plurality of flexible display panels are spliced together, the bending radius of the bending portion 20 is less than or equal to 0.2mm, and the bending diameter d of the bending portion 20 is less than or equal to 0.4mm, so that the sum of the thicknesses of the adhesive layer 40 and the heat dissipation layer 800 is equal to 0.4mm, and the thickness of the adhesive layer 40 is less than 0.4 mm. Further, the thickness of the first glue layer 41 and the second glue layer 43 is 0.05mm to 0.1 mm; the thickness of the support layer 42 is 0.2mm to 0.3 mm.
In the present embodiment, the flexible substrate 100 is, for example, a Polyimide film, which is preferably a Yellow Polyimide (YPI) film having high heat resistance, high reliability, high flexibility, low density, low dielectric constant, and easy to realize fine pattern circuit processing, but in other embodiments of the present invention, the Polyimide film may also be a transparent Polyimide (CPI) film; the driving circuit layer 200 may include a driving circuit formed of an array of thin film transistors, such as metal Oxide thin film transistors, preferably Indium Gallium Zinc Oxide (IGZO) thin film transistors having high mobility and suitable for large-area production; the light emitting layer 300 is formed by, for example, the Micro-LED light emitting unit array.
The following briefly introduces a manufacturing process of the display device, which includes the following steps:
step 1: referring to fig. 2, a driving circuit layer 200 including an IGZO thin film transistor array is prepared and formed on a glass substrate 1000 coated with a yellow polyimide film;
the yellow polyimide film is the flexible substrate 100 of the display device, the driving circuit layer 200 and the flexible substrate 100 cover the display portion 10, the bending portion 20, the binding portion 30 and the non-display portion of the display panel, the bending portion 20 and the binding portion 30 are located on one side of the display portion 10, and the non-display portion is located on the other side except for one side of the display portion 10.
Step 2: referring to fig. 3, Micro-LED chips of different colors are transferred on the driving circuit layer 200, respectively, to form the light emitting layer 300 on the display portion 10, and the light emitting layer 300 is subjected to OCA encapsulation, and an OCA thin film encapsulation layer 400 is formed on the light emitting layer 300;
the Micro-LED chips with different colors comprise red Micro-LED light-emitting units, green Micro-LED light-emitting units and blue Micro-LED light-emitting units.
And step 3: referring to fig. 4, a dispensing protection process is performed on a partial region of the bending part 20 and the binding part 30 to form the protective adhesive layer 500;
wherein, the bending part 20 and the binding part 30 are both located in an Outer Lead Bonding (OLB) area of the flexible line panel.
And 4, step 4: referring to fig. 5, a cover glass 700 including a black matrix 600 is attached on the OCA thin film encapsulation layer 400;
the black matrix 600 is used to prevent reflection of external ambient light, and the vertical projection portion of the cover glass 700 on the glass substrate 1000 is located at the non-display portion and the bending portion.
And 5: referring to fig. 5 to 6, the display device is cut, and the cover glass 700 vertically projected on the bending portion and the display device structure on the non-display portion are cut and removed along a section line BB and a section line AA, respectively, and a binding structure is formed at the binding portion;
wherein the binding structure refers to a circuit structure formed by binding and electrically connecting the binding terminals of the binding part with the printed circuit board 60 through the chip on film 50.
Step 6: referring to fig. 6 to 9, performing a Laser Lift Off (LLO) process on the display device, removing the glass substrate 1000 on one side of the flexible substrate, and sequentially attaching the heat dissipation layer 800 and the adhesive layer 40 on one side of the display device;
wherein, the preparation of adhesive linkage 40 is through attaching respectively in the both sides of a glass's supporting layer 42 first glue film 41 with second glue film 43 forms, the length and the width of supporting layer 42 with the length and the width of binding portion are the same, first glue film 41 with second glue film 43 covers completely in theory supporting layer 42, nevertheless because of the tolerance reason, first glue film 41 with the laminating precision of second glue film 43 and glass substrate is for example 50 um.
And 7: referring to fig. 10, the display device is bent by bending the binding portion 30 to the opposite side of the display portion 10 through the bent portion 20, and the binding portion 30 is fixedly connected to the display portion 10 through the adhesive layer 40.
The binding portion 30 and the display portion 10 are parallel to each other, the bending angle of the bending portion 20 is 180 °, and the bending portion 20 is a regular semi-circular arc.
On the other hand, this embodiment still provides a spliced screen, the spliced screen includes a plurality of above-mentioned any display device, it is a plurality of the display device array is arranged, wherein, arbitrary adjacent two the concatenation clearance of display device is less than or equal to 0.2 mm.
Example two
Fig. 11 is a schematic structural diagram of a display device according to another embodiment of the disclosure. As shown in fig. 11, a second embodiment of the present invention discloses a display device, including: a flexible display panel including a display part 10, a binding part 30, and a bending part 20 between the display part 10 and the binding part 30; the binding portion 30 is bent to the opposite side of the display portion 10 along the bending portion 20, and is connected to the display portion 10 through an adhesive layer 40, the adhesive layer 40 includes a first adhesive layer 41, a support layer 42 and a second adhesive layer 43, and the hardness of the support layer 42 is greater than the hardness of the first adhesive layer 41 and the second adhesive layer 43.
The display device disclosed in the second embodiment of the present invention is similar to the display device disclosed in the first embodiment, and the description of the same parts in this embodiment is omitted. In contrast, the perpendicular projection of the heat dissipation layer 800 on the display unit 10 does not overlap the perpendicular projection of the adhesive layer 40 on the display unit 10; wherein, the first glue layer 41 in the adhesive layer 40 is fixedly connected with the flexible substrate 100 of the binding part 30; the second adhesive layer 43 in the adhesive layer 40 is fixedly connected to the flexible substrate 100 of the display portion 10, that is, the sum of the thicknesses of the adhesive layer 40 and the heat dissipation layer 800 is equal to the bending diameter d of the bending portion 20, and the thickness of the adhesive layer 40 is equal to the bending diameter d of the bending portion 20.
In this embodiment, in order to reduce the frame area of the flexible display panel and ensure the splicing effect when a plurality of flexible display panels are spliced together, the bending radius of the bending portion 20 is less than or equal to 0.2mm, and the bending diameter d of the bending portion 20 is less than or equal to 0.4mm, so that the thickness of the adhesive layer 40 is less than or equal to 0.4 mm. Further, the thickness of the first glue layer 41 and the second glue layer 43 is 0.05mm to 0.1 mm; the thickness of the support layer 42 is 0.2mm to 0.3 mm.
On the other hand, this embodiment also provides a spliced screen, the spliced screen includes a plurality of display device of any above, wherein, the concatenation clearance of arbitrary adjacent two display device is less than or equal to 0.2 mm.
In summary, according to the display device and the splicing screen disclosed by the invention, the bonding layer for connecting the binding part and the display part is set to be a composite structure comprising the first adhesive layer, the supporting layer and the second adhesive layer, and the hardness of the supporting layer is greater than that of the first adhesive layer and that of the second adhesive layer, so that the deformation of the bonding layer for connecting the binding part and the display part can be effectively reduced, the capability of the bonding layer of the flexible display panel in resisting the deformation of the bonding layer caused by the external environment in the use process is enhanced, the bending stability of the flexible display panel is improved, the stability of the splicing gap between the display devices is ensured, and the display effect of the splicing screen is improved.
The display device and the tiled screen provided by the embodiment of the invention are described in detail above, and the principle and the implementation of the invention are explained in the text by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A display device, characterized in that the display device comprises:
the flexible display panel comprises a display part, a binding part and a bending part positioned between the display part and the binding part;
the binding part is positioned on the opposite side of the display part and is connected with the display part through an adhesive layer, the adhesive layer comprises a first adhesive layer, a supporting layer and a second adhesive layer which are arranged in a stacked mode, and the hardness of the supporting layer is greater than that of the first adhesive layer and that of the second adhesive layer.
2. The display device according to claim 1, wherein the support layer has a thickness at least twice as thick as the first glue layer or the second glue layer.
3. The display device according to claim 2, wherein the first adhesive layer and the second adhesive layer have the same thickness.
4. The display device according to claim 2, wherein the adhesive layer has a thickness of 0.4mm or less, wherein the first adhesive layer and the second adhesive layer each have a thickness of 0.05mm to 0.1 mm; the thickness of the support layer is 0.2mm to 0.3 mm.
5. The display device according to claim 1, wherein the flexible display panel further comprises a flexible substrate, a driving circuit layer, and a light-emitting layer, which are stacked in this order, the flexible substrate and the driving circuit layer being provided in the display portion, the bending portion, and the binding portion, the light-emitting layer being provided in the display portion;
the flexible display panel further comprises a protection adhesive layer arranged on the driving circuit layer on the bending portion, and the thickness of the protection adhesive layer is smaller than that of the first adhesive layer or the second adhesive layer.
6. The display device according to claim 5, wherein the flexible display panel further comprises a heat dissipation layer on a side of the flexible substrate away from the driving circuit layer, the heat dissipation layer is disposed on the display portion, and a thickness of the adhesive layer is 10 to 20 times a thickness of the heat dissipation layer.
7. The display device according to claim 6, wherein a perpendicular projection of the heat dissipation layer on the display portion overlaps a perpendicular projection of the adhesive layer on the display portion;
the first glue film in the bonding layer is fixedly connected with the heat dissipation layer of the display portion, the second glue film in the bonding layer is fixedly connected with the flexible substrate of the binding portion, and the thickness of the bonding layer is smaller than the bending diameter of the bending portion.
8. The display device according to claim 6, wherein a perpendicular projection of the heat dissipation layer on the display portion does not overlap a perpendicular projection of the adhesive layer on the display portion;
wherein, a first glue layer in the bonding layer is fixedly connected with the flexible substrate of the binding part; and a second adhesive layer in the adhesive layer is fixedly connected with the flexible substrate of the display part, and the thickness of the adhesive layer is equal to the bending diameter of the bending part.
9. The display device according to any one of claims 7 or 8, wherein the bent portion is shaped as a semicircular arc.
10. A spliced screen, which is characterized by comprising a plurality of display devices as claimed in any one of claims 1 to 9, wherein the plurality of display devices are arranged in an array, and the splicing gap between any two adjacent display devices is less than or equal to 0.2 mm.
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| CN202110771317.5A CN113570966A (en) | 2021-07-08 | 2021-07-08 | Display device and spliced screen |
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| CN202110771317.5A CN113570966A (en) | 2021-07-08 | 2021-07-08 | Display device and spliced screen |
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| CN113570966A true CN113570966A (en) | 2021-10-29 |
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