CN112968048B - Display device and manufacturing method thereof - Google Patents
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- CN112968048B CN112968048B CN202110183991.1A CN202110183991A CN112968048B CN 112968048 B CN112968048 B CN 112968048B CN 202110183991 A CN202110183991 A CN 202110183991A CN 112968048 B CN112968048 B CN 112968048B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K59/65—OLEDs integrated with inorganic image sensors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
An embodiment of the present invention provides a display device, including: the display panel comprises a display area and a binding area, wherein the display area comprises a display surface and a non-display surface which are arranged oppositely, and the binding area comprises a binding surface and a non-binding surface which are arranged oppositely; the first back plate is arranged on the non-display surface of the display area; the second back plate is arranged on the non-binding surface of the binding area; the birefringence of the first back plate is lower than that of the second back plate. According to the embodiment of the invention, the first back plate and the second back plate are respectively arranged in the display area and the binding area of the display panel, so that on one hand, the bendable flexible display panel can be supported and protected; on the other hand, because the birefringence of the first back plate is lower than that of the second back plate, compared with a display device adopting the second back plate on the whole surface, the embodiment of the invention can improve the ripple phenomenon of pictures or videos shot by the camera under the screen, thereby improving the shooting effect.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device and a manufacturing method thereof.
Background
At present, the frameless design of the screen of a display device, such as an Organic Light-Emitting Diode (OLED) display device, gradually becomes a popular design trend, a frameless screen refers to a screen with an extremely narrow frame, the screen and the frame are fused together to cause that the frame cannot be seen visually, and the frameless screen has the great advantage of outstanding appearance. In addition, the frameless screen can bring wider visual effect to the user, and the constraint feeling of a thick frame screen is eliminated.
However, the higher screen area ratio makes it impossible to place a fingerprint sensor, a camera, and the like in the screen area, and therefore, the screen down sensing technology comes up. Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device provided in the prior art, and the display device shown in fig. 1 is a flexible display device, specifically, a flexible organic light emitting diode display device. The display device includes: the display device comprises a display panel 100, a first back plate 2001, a second back plate 2002 and a camera 400. Wherein:
the display panel 100 is a flexible display panel 100 that can be bent. The display panel 100 includes a display region 1001, a bending region 1003, and a binding region 1002. The display area 1001 is used for displaying an image or performing touch control by a user, and a plane of the display area 1001 on which the image is displayed is referred to as a display surface, and a plane of the display area 1001 disposed opposite to the display surface is referred to as a non-display surface. The binding region 1002 may be configured to set various functional components, a plane of the binding region 1002, which is located on the same plane as the display surface, is referred to as a binding surface, a plane of the binding region 1002, which is located opposite to the binding surface, is referred to as a non-binding surface, the binding surface is configured to be electrically connected to the flexible circuit board 300, and the flexible circuit board 300 is configured to be electrically connected to a driver chip, so as to transmit a driving signal generated by the driver chip to the display panel 100.
The first backplane 2001 is disposed on a non-display surface of the display region 1001 of the display panel 100, the second backplane 2002 is disposed on a non-binding surface of the binding region 1002 of the display panel 100, and both the first backplane 2001 and the second backplane 2002 are made of polyethylene terephthalate (PET) and are used for supporting and protecting the display panel 100. The camera 400 is disposed on a side of the display device on the first back plate 2001 away from the display panel 100, and the camera 400 is disposed corresponding to the display area 1001. However, the pictures or videos shot by the camera 400 may have a moire phenomenon, that is, the pictures or videos may have moire-like stripes, which may affect the shooting effect.
Disclosure of Invention
Therefore, it is necessary to provide a display device and a method for manufacturing the same to solve the problem of moire phenomenon in the pictures or videos captured by the conventional display device with an off-screen camera.
In a first aspect, an embodiment of the present invention provides a display device, where the display device includes:
the display panel comprises a display area and a binding area, wherein the display area comprises a display surface and a non-display surface which are arranged oppositely, and the binding area comprises a binding surface and a non-binding surface which are arranged oppositely;
the first back plate is arranged on the non-display surface of the display area;
the second back plate is arranged on the non-binding surface of the binding area;
the first backplane has a birefringence that is lower than a birefringence of the second backplane.
In some embodiments, the length of the first back plate is less than or equal to the length of the display region, the elastic modulus of the material from which the first back plate is made ranges from 1 GPa to 4GPa, and the coefficient of thermal expansion of the material from which the first back plate 20 is made is greater than or equal to 50um/m x ℃.
In some embodiments, the material of which the first back plate is made is a cyclic olefin polymer material.
In some embodiments, the length of the second back plate is less than or equal to the length of the binding region, and the material of which the second back plate is made is polyethylene terephthalate.
In some embodiments, the display panel further comprises a bending region between the display region and the binding region.
In some embodiments, the display device further includes a flexible circuit board electrically connected to the binding surface of the binding region.
In some embodiments, the display device further includes a camera located on a side of the first backplane away from the display panel and disposed corresponding to the display area.
In a second aspect, an embodiment of the present invention provides a method for manufacturing a display device, where the method for manufacturing the display device includes:
providing a display panel, wherein the display panel comprises a display area and a binding area, the display area comprises a display surface and a non-display surface which are arranged oppositely, and the binding area comprises a binding surface and a non-binding surface which are arranged oppositely;
and manufacturing a first back plate on the non-display surface of the display area, and manufacturing a second back plate on the non-binding surface of the binding area, wherein the birefringence of the first back plate is lower than that of the second back plate.
In some embodiments, the length of the first back plate is less than or equal to the length of the display region, the elastic modulus of the material from which the first back plate is made ranges from 1 GPa to 4GPa, and the coefficient of thermal expansion of the material from which the first back plate is made is greater than or equal to 50um/m x ℃.
In some embodiments, the material of which the first back plate is made is a cyclic olefin polymer material.
According to the embodiment of the invention, the first back plate and the second back plate are respectively arranged in the display area and the binding area of the display panel, so that on one hand, the bendable flexible display panel can be supported and protected; on the other hand, because the birefringence of the first back plate is lower than that of the second back plate, compared with a display device adopting the second back plate on the whole surface, the embodiment of the invention can improve the ripple phenomenon of pictures or videos shot by the camera under the screen, thereby improving the shooting effect; on the other hand, the second backboard located in the binding area is made of polyethylene terephthalate, so that the shooting effect of the display device can be guaranteed, and meanwhile the reliability of the display device can be guaranteed.
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 provided in the prior art;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for manufacturing a display device according to an embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First, it should be noted that a significant reason why the conventional flexible display device has moire phenomenon in the pictures or videos captured by the off-screen camera is that the back plate (the first back plate 2001 made of polyethylene terephthalate as shown in fig. 1) located between the camera and the display panel has a high birefringence and a high degree of dispersion of light entering the camera. In view of the above, the present invention provides a new display device.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device shown in fig. 2 is a flexible display device, specifically, a flexible organic light emitting diode display device. The display device includes:
the display panel 10, the display panel 10 is a flexible display panel 10 that can be bent. It should be noted that the display panel 10 includes a substrate and an organic light emitting diode display device disposed on the substrate, where the substrate may be made of polyimide, polyetheretherketone, or transparent conductive polyester, and in the embodiment of the present invention, the substrate is made of polyimide.
The display panel 10 includes a display area 101, a bending area 103, and a binding area 102.
The display area 101 is used for displaying images or performing touch control by a user, and a plane of the display area 101 on which the images are displayed is referred to as a display surface, and a plane of the display area 101 opposite to the display surface is referred to as a non-display surface.
The bonding region 102 may be configured to set various functional components, a plane of the bonding region 102 that is located on the same plane as the display surface is referred to as a bonding plane, a plane of the bonding region 102 that is located opposite to the bonding plane is referred to as a non-bonding plane, the bonding plane is configured to be electrically connected to the flexible circuit board 30, and the flexible circuit board 30 is configured to be electrically connected to a driver chip, so as to transmit a driving signal generated by the driver chip to the display panel 10.
Since the display panel 10 is a flexible display panel 10 that can be bent, it needs to be supported and protected, in order to support and protect the display panel 10, the display panel 10 in the embodiment of the invention further includes a first backplane 201 and a second backplane 202, the first backplane 201 is disposed on a non-display surface of the display area 101 of the display panel 10, the second backplane 202 is disposed on a non-binding surface of the binding area 102 of the display panel 10, and a birefringence of the first backplane 201 is lower than a birefringence of the second backplane 202, that is, the first backplane 201 is a backplane with a low birefringence compared to the second backplane 202.
It should be noted that when ordinary light enters the inhomogeneous body, except for the reflected light on the surface of the inhomogeneous body, the light entering the inhomogeneous body is changed into two light beams, one light beam obeys the law of refraction and is called ordinary light, called O light for short, and the other light beam is not refracted according to the angle of the law of refraction and is called extraordinary light, called E light for short. This phenomenon is called birefringence, and the difference in refractive index between the two rays is called birefringence.
The display device further has an off-screen camera function, that is, the display device is further provided with a camera (not shown in fig. 2) on a side of the first back plate 201 away from the display panel 10, and the camera is arranged corresponding to the display area 101. It can be understood that, since the first back plate 201 is a back plate with low birefringence, the propagation direction of the refracted light is more concentrated after the light passes through the first back plate 201, so as to weaken or even eliminate the moire phenomenon of the photographed picture or video, and improve the photographing effect.
In the display device provided by the embodiment of the invention, because the birefringence of the first back plate 201 is lower than that of the second back plate 202, compared with a display device adopting the second back plate on the whole surface, the display device provided by the embodiment of the invention can improve the ripple phenomenon of pictures or videos shot by the camera, thereby improving the shooting effect.
In some embodiments, the length of the first back plane 201 is less than or equal to the length of the display area 101, and the length of the first back plane 201 shown in fig. 2 is equal to the length of the display area 101. The elastic modulus of the material used to fabricate the first backplate 201 ranges from 1 GPa to 4GPa, and the coefficient of thermal expansion of the material used to fabricate the first backplate 201 is greater than or equal to 50um/m x ℃.
Multiple experiments show that for the display device, in the process of manufacturing the first back plate 201 by using a material with the elastic modulus ranging from 1 to 4GPa and the thermal expansion coefficient greater than or equal to 50um/m DEG C, the molecular structure of the material is not damaged by pressing the material by using a roller, so that the prepared first back plate 201 has a low birefringence, and further, the picture or video shot by the camera does not have a ripple phenomenon, and the shooting effect is improved.
In some embodiments, the material of the first back plate 201 is Cyclic Olefin Polymer (COP) material. It should be noted that the modulus of elasticity of the cyclic olefin polymer material is in the range of 1-4Gpa and its coefficient of thermal expansion is greater than or equal to 50 um/m.
In some embodiments, the length of the second backplane 202 is less than or equal to the length of the bonding region 102, and the length of the second backplane 202 shown in fig. 2 is equal to the length of the bonding region 102. The material for making the second back plate 202 is polyethylene terephthalate.
It should be noted that the polyethylene terephthalate has the advantages of low elastic modulus and being not easy to expand when heated, so that the second backplane 202 manufactured by the polyethylene terephthalate does not affect the binding effect of the binding region 102 on the flexible circuit board 30 due to the change of the environmental temperature, thereby ensuring the reliability of the display device.
It can be understood that, in the embodiment of the present invention, the first backplane 201 and the second backplane 202 are respectively disposed in the display area 101 and the binding area 102 of the display panel 10, so that on one hand, the bendable flexible display panel 10 can be supported and protected; on the other hand, since the birefringence of the first back plate 201 is lower than that of the second back plate 202, compared with a display device in which the second back plate is adopted on the whole surface, the embodiment of the invention can improve the moire phenomenon of a picture or video shot by the camera under the screen, thereby improving the shooting effect; on the other hand, since the second back plate 202 located in the bonding region 102 is made of polyethylene terephthalate, the reliability of the display device can be ensured while the shooting effect of the display device is ensured.
In some embodiments, the display panel 10 further includes a bending region 103, and the bending region 103 is located between the display region 101 and the binding region 102. It is understood that, in other embodiments, the display panel 10 may further include only the display area 101 and the binding area 102, and the display area 101 is adjacent to the binding area 102.
In some embodiments, the display device further comprises a flexible circuit board 30, wherein the flexible circuit board 30 is electrically connected with the binding surface of the binding region 102.
Specifically, the bonding surface is used to electrically connect a flexible circuit board 30, and the flexible circuit board 30 is used to electrically connect a driving chip so as to transmit a driving signal generated by the driving chip into the display panel 10. In some embodiments, the display device further includes a camera (not shown in fig. 2) located on a side of the first back plate 201 away from the display panel 10 and corresponding to the display area 101.
It should be noted that, because the birefringence of the first back plate 201 is lower than the birefringence of the second back plate 202, compared with a display device that adopts the second back plate on the whole, the embodiment of the invention can improve the moire phenomenon of the picture or video shot by the camera under the screen, thereby improving the shooting effect.
Referring to fig. 3, fig. 3 is a flowchart of a manufacturing method of a display device according to an embodiment of the present invention, and with reference to fig. 2, the manufacturing method shown in fig. 3 includes:
step S1, providing a display panel 10, where the display panel 10 includes a display area 101 and a binding area 102, the display area 101 includes a display surface and a non-display surface that are arranged oppositely, and the binding area 102 includes a binding surface and a non-binding surface that are arranged oppositely.
Specifically, the display panel 10 is a flexible display panel 10 that can be bent. It should be noted that the display panel 10 includes a substrate, and the substrate may be made of polyimide, polyetheretherketone, or transparent conductive polyester, and in the embodiment of the present invention, the substrate is made of polyimide.
The display panel 10 includes a display area 101, a bending area 103, and a binding area 102.
The display area 101 is used for displaying images or performing touch control by a user, and a plane of the display area 101 on which the images are displayed is referred to as a display surface, and a plane of the display area 101 opposite to the display surface is referred to as a non-display surface.
The bonding area 102 may be configured to set various functional components, a plane of the bonding area 102 that is located on the same plane as the display surface is referred to as a bonding surface, a plane of the bonding area 102 that is located opposite to the bonding surface is referred to as a non-bonding surface, the bonding surface is configured to be electrically connected to the flexible circuit board 30, and the flexible circuit board 30 is configured to be electrically connected to a driver chip, so as to transmit a driving signal generated by the driver chip to the display panel 10.
Step S2, fabricating a first back sheet 201 on the non-display surface of the display area 101, and fabricating a second back sheet 202 on the non-binding surface of the binding area 102, where the birefringence of the first back sheet 201 is lower than the birefringence of the second back sheet 202.
Since the display panel 10 is a flexible display panel 10 that can be bent, it needs to be supported and protected by 20, in order to support and protect the display panel 10, the display panel 10 in the embodiment of the present invention further includes a first backplane 201 and a second backplane 202, the first backplane 201 is disposed on the non-display surface of the display area 101 of the display panel 10, the second backplane 202 is disposed on the non-binding surface of the binding area 102 of the display panel 10, the birefringence of the first backplane 201 is lower than that of the second backplane 202, that is, the first backplane 201 is a backplane with low birefringence compared to the second backplane 202.
It should be noted that when ordinary light enters the inhomogeneous body, except for the reflected light on the surface of the inhomogeneous body, the light entering the inhomogeneous body is changed into two light beams, one light beam obeys the law of refraction and is called ordinary light, called O light for short, and the other light beam is not refracted according to the angle of the law of refraction and is called extraordinary light, called E light for short. This phenomenon is called birefringence, and the difference in refractive index between the two rays is called birefringence.
The display device further has an off-screen camera function, that is, the display device is further provided with a camera (not shown in fig. 2) on a side of the first back plate 201 away from the display panel 10, and the camera is arranged corresponding to the display area 101. It can be understood that, since the first back plate 201 is a back plate with low birefringence, the propagation direction of the refracted light is more concentrated after the light passes through the first back plate 201, so as to weaken or even eliminate the moire phenomenon of the photographed picture or video, and improve the photographing effect.
In the display device manufactured in the embodiment of the present invention, since the birefringence of the first back plate 201 is lower than the birefringence of the second back plate 202, compared with a display device in which the second back plate is adopted on the whole surface, the display device manufactured in the embodiment of the present invention can improve the moire phenomenon of the picture or video shot by the camera, thereby improving the shooting effect.
In some embodiments, the length of the first back plane 201 is less than or equal to the length of the display area 101, and the length of the first back plane 201 shown in fig. 2 is equal to the length of the display area 101. The elastic modulus of the material used to fabricate the first backplate 201 ranges from 1 GPa to 4GPa, and the coefficient of thermal expansion of the material used to fabricate the first backplate 201 is greater than or equal to 50um/m x ℃.
Multiple experiments show that for the display device, in the process of manufacturing the first back plate 201 by using a material with the value range of the elastic modulus of 1-4Gpa and the thermal expansion coefficient of more than or equal to 50um/m DEG C, the molecular structure of the material is not damaged by pressing the material by using a roller, so that the refractive indexes of all parts of the manufactured first back plate 201 are basically the same, the phenomenon of corrugation of pictures or videos shot by a camera is avoided, and the shooting effect is improved.
In some embodiments, the material of the first backplane 201 is a cyclic olefin polymer material. It should be noted that the modulus of elasticity of the cyclic olefin polymer material is in the range of 1-4Gpa, and the coefficient of thermal expansion is greater than or equal to 50um/m x ℃.
In some embodiments, the length of the second backplane 202 is less than or equal to the length of the bonding region 102, and the length of the second backplane 202 shown in fig. 2 is equal to the length of the bonding region 102. The material for making the second back plate 202 is polyethylene terephthalate.
It should be noted that the polyethylene terephthalate has the advantages of low elastic modulus and being not easy to expand when heated, so that the second backplane 202 manufactured by the polyethylene terephthalate does not affect the binding effect of the binding region 102 on the flexible circuit board 30 due to the change of the environmental temperature, thereby ensuring the reliability of the display device.
It can be understood that, in the embodiment of the present invention, the first backplane 201 and the second backplane 202 are respectively disposed in the display area 101 and the binding area 102 of the display panel 10, so that on one hand, the bendable flexible display panel 10 can be supported and protected; on the other hand, since the birefringence of the first back plate 201 is lower than that of the second back plate 202, compared with a display device in which the second back plate is adopted on the whole surface, the embodiment of the invention can improve the moire phenomenon of a picture or video shot by the camera under the screen, thereby improving the shooting effect; on the other hand, since the second back plate 202 located in the bonding region 102 is made of polyethylene terephthalate, the reliability of the display device can be ensured while the shooting effect of the display device is ensured.
In some embodiments, the display panel 10 further includes a bending region 103, and the bending region 103 is located between the display region 101 and the binding region 102. It is understood that, in other embodiments, the display panel 10 may further include only the display area 101 and the binding area 102, and the display area 101 is adjacent to the binding area 102.
In some embodiments, the display device further comprises a flexible circuit board 30, wherein the flexible circuit board 30 is electrically connected with the binding surface of the binding region 102.
Specifically, the bonding surface is used to electrically connect a flexible circuit board 30, and the flexible circuit board 30 is used to electrically connect a driving chip to transmit a driving signal generated by the driving chip to the display panel 10. In some embodiments, the display device further includes a camera (not shown in fig. 2) located on a side of the first back plate 201 away from the display panel 10 and corresponding to the display area 101.
It should be noted that, because the birefringence of the first backplane 201 is lower than the birefringence of the second backplane 202, compared with a display device in which the second backplane is adopted on the whole surface, the embodiment of the present disclosure can improve the moire phenomenon of the picture or video captured by the camera under the screen, thereby improving the capturing effect.
Finally, it should be noted that: the above examples are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A display device, characterized in that the display device comprises:
the display panel comprises a display area and a binding area, wherein the display area comprises a display surface and a non-display surface which are arranged oppositely, and the binding area comprises a binding surface and a non-binding surface which are arranged oppositely;
the first back plate is arranged on the non-display surface of the display area;
the second back plate is arranged on the non-binding surface of the binding area;
the first backplane has a birefringence that is lower than the birefringence of the second backplane, and the first backplane has a birefringence that is lower than the polyethylene terephthalate material.
2. The display device according to claim 1, wherein the length of the first back plate is less than or equal to the length of the display region, the elastic modulus of a material from which the first back plate is made ranges from 1 GPa to 4GPa, and the coefficient of thermal expansion of the material from which the first back plate is made is greater than or equal to 50um/m ℃.
3. The display device according to claim 2, wherein the first backplane is made of a cyclic olefin polymer material.
4. The display device according to claim 1, wherein the length of the second back plate is less than or equal to the length of the bonding region, and the second back plate is made of polyethylene terephthalate.
5. The display device according to claim 1, wherein the display panel further comprises a bending region between the display region and the binding region.
6. The display device according to claim 1, further comprising a flexible circuit board electrically connected to the binding surface of the binding region.
7. The display device according to claim 1, further comprising a camera, wherein the camera is located on a side of the first back plate away from the display panel and is disposed corresponding to the display area.
8. A manufacturing method of a display device is characterized by comprising the following steps:
providing a display panel, wherein the display panel comprises a display area and a binding area, the display area comprises a display surface and a non-display surface which are arranged oppositely, and the binding area comprises a binding surface and a non-binding surface which are arranged oppositely;
manufacturing a first back plate on a non-display surface of the display area, manufacturing a second back plate on a non-binding surface of the binding area, wherein the birefringence of the first back plate is lower than that of the second back plate, and the birefringence of the first back plate is lower than that of the polyethylene terephthalate material.
9. The method of claim 8, wherein the length of the first back plate is less than or equal to the length of the display region, the elastic modulus of the material of the first back plate ranges from 1 GPa to 4GPa, and the thermal expansion coefficient of the material of the first back plate is greater than or equal to 50um/m ℃.
10. The method of claim 9, wherein the first backplane is made of a cyclic olefin polymer material.
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| WO2024004773A1 (en) * | 2022-06-27 | 2024-01-04 | 東レ株式会社 | Film for back face plate and polyester film, and image display apparatus and device with film for back face plate or polyester film mounted therein |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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