Disclosure of Invention
The application discloses an electronic paper display panel, which can solve the technical problem that a double-sided electronic paper display screen with front light is lacking at present under the condition of effectively reducing the screen thickness of the electronic paper display panel.
In a first aspect, the present application provides an electronic paper display panel, where the electronic paper display panel includes a first display panel, a second display panel, a substrate, and a plurality of reflecting members, where the first display panel and the second display panel each include an electronic paper substrate and a display assembly, the display assemblies are respectively disposed on two sides of the substrate, the electronic paper substrate is respectively disposed on a side of the display assembly facing away from the substrate, the plurality of reflecting members are disposed at intervals on a side of the electronic paper substrate facing away from the substrate, and the reflecting members are configured to reflect light reflected in the electronic paper substrate toward a direction of a side where the display assembly is located.
The electronic paper substrate is multiplexed into the light guide plate of the electronic paper display panel, so that the screen thickness of the electronic paper display panel is effectively reduced, meanwhile, the cost of independently manufacturing the light guide plate is reduced, and the utilization rate of light is improved due to the arrangement of the reflecting piece.
Optionally, the electronic paper display panel further includes a packaging part, a driving circuit, a first backlight source and a second backlight source, the electronic paper display panel has a display area and a non-display area, the non-display area is enclosed in the display area, the packaging part is used for packaging the non-display area, the driving circuit is packaged on one side of the packaging part, the first backlight source and the second backlight source are packaged on the other side of the packaging part, wherein the driving circuit is used for driving the first display panel, the second display panel, the first backlight source and the second backlight source to work, the first backlight source is used for providing a light source for the first display panel, and the second backlight source is used for providing a light source for the second display panel.
Optionally, the electronic paper display panel further includes a packaging part, a first driving circuit, a second driving circuit, a first backlight source and a second backlight source, the electronic paper display panel has a display area and a non-display area, the non-display area is enclosed in the display area, the packaging part is used for packaging the non-display area, the first driving circuit and the first backlight source are packaged on one side of the packaging part, the second driving circuit and the second backlight source are packaged on the other side of the packaging part, wherein the first driving circuit is used for driving the first display panel, the first backlight source works, the second driving circuit is used for driving the second display panel and the second backlight source works, the first backlight source is used for providing a light source for the first display panel, and the second backlight source is used for providing a light source for the second display panel.
Optionally, the first backlight source is disposed on a surface of the electronic paper substrate perpendicular to the first display panel and the substrate stacking direction, the second backlight source is disposed on a surface of the electronic paper substrate perpendicular to the second display panel in the stacking direction, and light emitting directions of the first backlight source and the second backlight source face the electronic paper substrate.
Optionally, the first backlight source is disposed on a surface of the electronic paper substrate perpendicular to the first display panel and the substrate stacking direction of the first display panel, the second backlight source is disposed on a surface of the electronic paper substrate perpendicular to the stacking direction of the second display panel, a light emitting direction of the first backlight source and the second backlight source deviates from a side where the electronic paper substrate is located, the electronic paper display panel further includes a reflective coating, and the reflective coating is disposed on a surface of a side, perpendicular to the stacking direction, of the package adjacent to the first backlight source and/or the second backlight source.
Optionally, the reflecting element is disposed on a surface of the electronic paper substrate, which is away from the substrate, or disposed on a surface of the electronic paper substrate, which is adjacent to the substrate.
Optionally, the electronic paper display panel further includes a protective layer, where the protective layer is disposed on a side of the reflecting member facing away from the electronic paper substrate, and is used for protecting the reflecting member.
Optionally, the material of the electronic paper substrate includes any one or more of glass, polymethyl methacrylate (PMMA), methyl methacrylate styrene copolymer (MS), polystyrene (PS) or Polycarbonate (PC).
Optionally, the electronic paper display panel further includes an anti-reflection layer, and the anti-reflection layer is disposed on a side of the reflection member facing away from the electronic paper substrate.
In a second aspect, the present application further provides an electronic device, where the electronic device includes a housing and the electronic paper display panel according to the first aspect, and the housing is used to carry the electronic paper display panel.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.
The application provides an electronic paper display panel 1, referring to fig. 1 and 2, fig. 1 is a schematic top view of the electronic paper display panel according to an embodiment of the application, and fig. 2 is a schematic cross-sectional view along line I-I in fig. 1. The electronic paper display panel 1 comprises a first display panel 11, a second display panel 12, a substrate 13 and a plurality of reflecting pieces 14, wherein the first display panel 11 and the second display panel 12 comprise an electronic paper substrate 1a and a display assembly 1b, the display assemblies 1b are respectively arranged on two sides of the substrate 13, the electronic paper substrate 1a is respectively arranged on one side, deviating from the substrate 13, of the display assembly 1b, the reflecting pieces 14 are arranged on one side, deviating from the substrate 13, of the electronic paper substrate 1a at intervals, and the reflecting pieces 14 are used for reflecting light rays reflected in the electronic paper substrate 1a towards one side, where the display assembly 1b is located, of the electronic paper substrate 1 a.
As shown in fig. 2, the display assembly 1b generally includes a common electrode layer 1b1, an electronic ink layer 1b2, a first insulating layer 1b3, a pixel electrode layer 1b4, and a second insulating layer 1b5, where the common electrode layer 1b1 is disposed on the electronic paper substrate 1a, the electronic ink layer 1b2 is disposed on a side surface of the common electrode layer 1b1 facing away from the electronic paper substrate 1a, the first insulating layer 1b3 is disposed on a side surface of the electronic ink layer 1b2 facing away from the common electrode layer 1b1, the pixel electrode layer 1b4 is disposed on a side surface of the first insulating layer 1b3 facing away from the electronic ink layer 1b2, the second insulating layer 1b5 is disposed on a side surface of the pixel electrode layer 1b4 facing away from the first insulating layer 1b3 and on the substrate 13, and the structures in the first display panel 11 and the second display panel 12 are mirror-symmetrical with respect to the substrate 13. The substrate 13 is made of metal material, or ceramic or glass doped with metal nanowires, and the pixel electrode layer 1b4 and the common electrode layer 1b1 control the positions of ink particles in the electronic ink layer 1b2 under the control of an electric signal transmitted in the substrate 13, and the positions of the ink particles in the electronic ink layer 1b2 are matched with the light rays reflected by the reflecting piece 14 towards the display component 1b, so that different gray scales or colors are displayed, thereby realizing the display of pictures, wherein the ink particles in the electronic ink layer 1b2 can be black-white, red-white and other bicolor electronic ink capsules, or can be ink microcups, bicolor microcups or polychromatic microcups, and the application is not limited to this.
Specifically, the electronic paper substrate 1a is used for carrying the display assembly 1b, and is also used for reflecting and transmitting light provided by a backlight source inside the electronic paper substrate to reflect the light provided by the backlight source to the reflecting member 14, so that the light reflected by the reflecting member 14 can be reflected towards a direction of a side where the display assembly 1b is located, and light required by a display screen is provided for the electronic ink layer 1b2, wherein a transmission direction of the light can be shown by a dashed arrow in fig. 2. That is, in the present embodiment, the electronic paper substrate 1a is multiplexed as the light guide plate of the display module 1b, thereby effectively reducing the screen thickness of the electronic paper display panel 1.
It can be appreciated that in this embodiment, by multiplexing the electronic paper substrate 1a as the light guide plate of the electronic paper display panel 1, the screen thickness of the electronic paper display panel 1 is effectively reduced, and at the same time, the cost of separately manufacturing the light guide plate is reduced, and the arrangement of the reflecting member 14 improves the light utilization rate.
The application also provides a preparation method of the electronic paper display panel, please refer to fig. 3-5, fig. 3 is a schematic flow chart of the preparation method of the electronic paper display panel according to an embodiment of the application, fig. 4 is a schematic first intermediate structure according to an embodiment of the application, and fig. 5 is a schematic second intermediate structure according to an embodiment of the application. The preparation method of the electronic paper display panel comprises steps S301, S302, S303, S304, S305, S306, S307, S308 and S309, wherein the steps S301, S302, S303, S304, S305, S306, S307, S308 and S309 are described in detail below.
S301, providing a substrate 13, and coating and forming a second insulating layer 1b5 on one side of the substrate 13;
s302, forming a pixel electrode layer 1b4 on the second insulating layer 1b5 by sputtering, coating, developing or etching;
s303, forming a first insulating layer 1b3 on the pixel electrode layer 1b4 by coating, developing or etching;
S304, repeating the steps, and forming the second insulating layer 1b5, the pixel electrode layer 1b4 and the first insulating layer 1b3 on the other side of the substrate 13 to form a first intermediate structure 1c;
s305, providing an electronic paper substrate 1a, and forming a reflecting member 14 on one side of the electronic paper substrate 1a by means of laser, die pressing or printing;
S306, forming a common electrode layer 1b1 on one side of the electronic paper substrate 1a, which is away from the reflecting piece 14, in a sputtering mode;
S307, forming an electronic ink layer 1b2 on the side of the public electrode layer 1b1 away from the electronic paper substrate 1a in a coating mode;
s308, forming a packaging layer 1b6 on one side of the electronic ink layer 1b2, which is away from the public electrode layer 1b1, so as to form a second intermediate structure 1d;
S309, removing the encapsulation layers 1b6 of the two second intermediate structures 1d, and compositing the two encapsulation layers with two sides of the first intermediate structure 1c to form the electronic paper display panel 1.
In the present embodiment, the first intermediate structure 1c shown in fig. 4 is formed based on steps S301 to S304, the second intermediate structure 1d shown in fig. 5 is formed based on steps S305 to S308, and finally the first intermediate structure 1c and the two second intermediate structures 1d are combined to form the electronic paper display panel 1. It will be appreciated that, in other possible embodiments, the process flow of the method for manufacturing the electronic paper display panel may be different, for example, the second intermediate structure 1d may be manufactured first and then the first intermediate structure 1c may be manufactured, the hierarchical structures in the first intermediate structure 1c and the second intermediate structure 1d may be formed through different manufacturing processes, or the division of the hierarchical structures in the first intermediate structure 1c and the second intermediate structure 1d may be different from that in the present embodiment, which is not limited by the present application.
In one possible embodiment, please refer to fig. 6, fig. 6 is a schematic diagram illustrating an encapsulation of an electronic paper display panel according to an embodiment of the present application. The electronic paper display panel 1 further comprises a packaging member 15, a driving circuit 16, a first backlight source 17 and a second backlight source 18, the electronic paper display panel 1 is provided with a display area 1e and a non-display area 1f, the non-display area 1f is surrounded by the display area 1e, the packaging member 15 is used for packaging the non-display area 1f, the driving circuit 16 is packaged on one side of the packaging member 15, the first backlight source 17 and the second backlight source 18 are packaged on the other side of the packaging member 15, the driving circuit 16 is used for driving the first display panel 11, the second display panel 12, the first backlight source 17 and the second backlight source 18 to work, the first backlight source 17 is used for providing a light source for the first display panel 11, and the second backlight source 18 is used for providing a light source for the second display panel 12.
Specifically, the display area 1e is used for displaying a picture, and the non-display area 1f is used for being matched with the packaging member 15 to package the driving circuit 16, the first backlight 17 and the second backlight 18. As shown in fig. 6, the package 15 includes a first accommodating space 151 and a second accommodating space 152, wherein the first accommodating space 151 is configured to accommodate the first backlight 17, the second backlight 18, and a driving chip 161 in the driving circuit 16, and the second accommodating space 152 is configured to accommodate a power source 162, a circuit board 163, and the like in the driving circuit 16 and is electrically connected to the driving chip 161 in the driving circuit 16 through an electrical connection wire, and the first backlight 17 and the second backlight 18 are electrically connected through an electrical connection wire buried in the non-display area 1f, so as to provide an operating voltage and a control electrical signal for the driving chip 161 in the driving circuit 16, the first backlight 17, and the second backlight 18.
It can be appreciated that, since the first accommodating space 151 is a half-open accommodating space, after the driving chip 161, the first backlight 17, and the second backlight 18 in the driving circuit 16 are accommodated in the first accommodating space 151, it is generally necessary to further provide a packaging adhesive, and the first accommodating space 151 is packaged by the packaging adhesive.
In this embodiment, the electronic paper display panel 1 further includes a carrier 19, where the carrier 19 is configured to carry the first backlight 17 and the second backlight 18, and the light emitting direction of the first backlight 17 is opposite to the first display panel 11, and the light emitting direction of the second backlight 18 is opposite to the second display panel 12. It can be appreciated that the first backlight 17 and the second backlight 18 adopt side-in backlights, and combine to multiplex the electronic paper substrate 1a into the light guide plate of the electronic paper display panel 1, so that the package 15 is used for packaging the driving circuit 16, the first backlight 17 and the second backlight 18, and the occupied space is reduced, so that the overall structure of the electronic paper display panel 1 is lighter and thinner.
It should be understood that, in other possible embodiments, the power source 162, the circuit board 163, and the like in the driving circuit 16 are disposed in the second accommodating space 152 on one side of the package 15, and the package 15 on the other side only includes the first accommodating space 151, so that the space occupied by the package 15 can be further reduced, which is not limited by the present application.
In one possible embodiment, please refer to fig. 7, fig. 7 is a schematic diagram illustrating an encapsulation of an electronic paper display panel according to another embodiment of the present application. The electronic paper display panel 1 further comprises a package 15, a first driving circuit 164, a second driving circuit 165, a first backlight 17 and a second backlight 18, the electronic paper display panel 1 has a display area 1e and a non-display area 1f, the non-display area 1f is enclosed in the display area 1e, the package 15 is used for packaging the non-display area 1f, the first driving circuit 164 and the first backlight 17 are packaged on one side of the package 15, the second driving circuit 165 and the second backlight 18 are packaged on the other side of the package 15, wherein the first driving circuit 164 is used for driving the first display panel 11, the first backlight 17 works, the second driving circuit 165 is used for driving the second display panel 12 and the second backlight 18 to work, the first backlight 17 is used for providing a light source for the first display panel 11, and the second backlight 18 is used for providing a light source for the second display panel 12.
In this embodiment, the power source 162, the circuit board 163, and the like in the first driving circuit 164 and the second driving circuit 165 are respectively disposed in the second accommodating space 152 on opposite sides of the package 15, and the first driving circuit 164 and the second driving circuit 165 may be electrically connected to each other through an electrical connection wire buried in the non-display area 1 f.
It will be appreciated that the difference between the present embodiment and the previous embodiment is that the first driving circuit 164 and the second driving circuit 165 independently drive the first display panel 11 and the second display panel 12, respectively, so that the first display panel 11 and the second display panel 12 can be used to display different display pictures under the control of the first driving circuit 164 and the second driving circuit 165, respectively, so as to further improve the display diversity of the electronic paper display panel 1.
In one possible embodiment, please refer to fig. 8, fig. 8 is a schematic diagram of a backlight package according to an embodiment of the present application. The first backlight 17 is disposed on a surface of the electronic paper substrate 1a of the first display panel 11 perpendicular to a stacking direction of the first display panel 11 and the substrate 13, the second backlight 18 is disposed on a surface of the electronic paper substrate 1a of the second display panel 12 perpendicular to the stacking direction, and a light emitting direction of the first backlight 17 and the second backlight 18 is directed toward the electronic paper substrate 1a.
Specifically, the stacking direction of the first display panel 11 and the substrate 13 and the stacking direction perpendicular thereto are shown by dotted arrows in fig. 8, respectively. It can be appreciated that, in the present embodiment, the first display panel 11 and the second display panel 12 are directly used as the carrying portions of the first backlight 17 and the second backlight 18, respectively, so that the volume of the first accommodating space 151 is reduced, that is, the space required for the non-display area 1f of the electronic paper display panel 1 is reduced, thereby enabling the narrow bezel design of the electronic paper display panel 1.
In one possible embodiment, please refer to fig. 9, fig. 9 is a schematic diagram of a backlight package according to another embodiment of the present application. The first backlight 17 is disposed on a surface of the electronic paper substrate 1a perpendicular to the stacking direction of the first display panel 11 and the substrate 13, the second backlight 18 is disposed on a surface of the electronic paper substrate 1a perpendicular to the stacking direction of the second display panel 12, a light emitting direction of the first backlight 17 and the second backlight 18 faces away from a side where the electronic paper substrate 1a is located, the electronic paper display panel 1 further includes a reflective coating 1g, and the reflective coating 1g is disposed on a side surface of the package 15 adjacent to the first backlight 17 and/or the second backlight 18 perpendicular to the stacking direction.
It can be understood that the present embodiment is different from the previous embodiment in that the light emitting directions of the first backlight 17 and the second backlight 18 are different. In this embodiment, the light emitting directions of the first backlight 17 and the second backlight 18 are away from the side of the electronic paper substrate 1a, i.e. toward the inner side wall of the first accommodating space 151 of the package 15. Therefore, the reflective coating 1g needs to be disposed on a side surface of the package 15 adjacent to the first backlight 17 and/or the second backlight 18 in the direction perpendicular to the stacking direction, that is, the reflective coating 1g is disposed on an inner sidewall of the first receiving space 151, so that light emitted from the first backlight 17 and the second backlight 18 can be reflected into the electronic paper substrate 1 a.
It will be appreciated that the first backlight 17 and the second backlight 18 may be flip-chip structures or front-mounted structures, and the differences between the light emitting directions are different. Therefore, the packaging manners of the first backlight 17 and the second backlight 18 provided in this embodiment and the previous embodiment may correspond to the packaging structures of the first backlight 17 and the second backlight 18, so as to increase the adaptability of the electronic paper display panel 1 to electronic components with different packaging structures.
In one possible embodiment, please refer to fig. 2 and fig. 10 together, fig. 10 is a schematic cross-sectional view of an electronic paper display panel according to an embodiment of the present application. The reflecting member 14 is disposed on a side surface of the electronic paper substrate 1a facing away from the substrate 13, or on a side surface of the electronic paper substrate 1a adjacent to the substrate 13.
It will be appreciated that in this embodiment, as shown by the dashed arrow in fig. 2, when the reflecting member 14 is disposed on a side surface of the electronic paper substrate 1a, which is away from the substrate 13, most of the light may be incident on the reflecting member 14 from a side direction of the reflecting member 14, which is adjacent to the electronic paper substrate 1a, so that the reflecting member 14 can effectively reflect the light toward the side of the display assembly 1b, and such a disposition enables a higher light utilization rate, whereas, as shown by the dashed arrow in fig. 10, when the reflecting member 14 is disposed on a side surface of the electronic paper substrate 1a, which is adjacent to the substrate 13, a part of the light may be incident on the reflecting member 14 from both sides perpendicular to the stacking direction, and accordingly, the reflecting member 14 may reflect the part of the light back in a direction perpendicular to the stacking direction, but cannot reflect the light toward the side of the display assembly 1b, and thus such a disposition protects the electronic paper substrate 1 from the abrasion due to the fact that the reflecting member 14 is disposed on the side surface of the reflecting member 14, which is adjacent to the substrate 13, when the reflecting member 14 is disposed on the side surface of the electronic paper substrate 1a, which is less likely to be worn than the reflecting member 14.
It will be appreciated that the reflecting member 14 may be selectively disposed on a side surface of the electronic paper substrate 1a facing away from the substrate 13, or on a side surface of the electronic paper substrate 1a adjacent to the substrate 13, according to practical situations, which is not limited in the present application.
In one possible embodiment, please refer to fig. 11, fig. 11 is a schematic cross-sectional view of an electronic paper display panel according to another embodiment of the present application. The electronic paper display panel 1 further comprises a protective layer 1h, wherein the protective layer 1h is arranged on one side of the reflecting piece 14, which is away from the electronic paper substrate 1a, and is used for protecting the reflecting piece 14.
It will be appreciated that, when the reflecting member 14 is disposed on a side surface of the electronic paper substrate 1a facing away from the substrate 13, as shown in fig. 11, the reflecting member 14 may be worn, so as to affect the light reflection effect, thereby resulting in poor display effect of the electronic paper display panel 1. Therefore, in this embodiment, the protective layer 1h is disposed on the side of the reflecting member 14 away from the electronic paper substrate 1a, and the protective layer 1h is wrapped on the reflecting member 14, so as to achieve the purpose of protecting the reflecting member 14, ensure that the reflecting member 14 has a good reflection effect of reflecting light toward the side of the display assembly 1b, and improve the display effect of the electronic paper display panel 1.
In one possible embodiment, the material of the electronic paper substrate 1a includes any one or more of glass, polymethyl methacrylate (PMMA), methyl methacrylate styrene copolymer (MS), polystyrene (PS), or Polycarbonate (PC).
It can be understood that the electronic paper substrate 1a is used as a light guide plate of the first display panel 11 and the second display panel 12, and the electronic paper substrate 1a is used as a carrier plate of the display assembly 1b in the first display panel 11 and the second display panel 12, which itself needs to have a characteristic of being capable of reflecting light, and also needs to have a certain supporting strength. Therefore, in the present embodiment, the material of the electronic paper substrate 1a includes any one or more of glass, polymethyl methacrylate (PMMA), methyl methacrylate styrene copolymer (MS), polystyrene (PS), and Polycarbonate (PC).
It will be appreciated that in other possible embodiments, the electronic paper substrate 1a may also comprise other organic transparent materials, which the present application is not limited to.
In one possible embodiment, please refer to fig. 12, fig. 12 is a schematic cross-sectional view of an electronic paper display panel according to another embodiment of the present application. The electronic paper display panel 1 further comprises an anti-reflection layer 1i, wherein the anti-reflection layer 1i is arranged on one side of the reflection piece 14, which is away from the electronic paper substrate 1 a.
It will be appreciated that the light emitted by the first backlight 17 and the second backlight 18 propagates in the electronic paper substrate 1a, and may not be totally reflected by the reflecting member 14 toward the side of the display unit 1 b. In this embodiment, in order to improve the light utilization rate, the anti-reflection layer 1i is disposed on a side of the reflecting member 14 away from the electronic paper substrate 1a, so that a portion of the light that is not reflected to the reflecting member 14 can be reflected back into the electronic paper substrate 1a for reflection and propagation, until the light is reflected to the reflecting member 14, and is reflected by the reflecting member 14 toward a side of the display assembly 1b, thereby improving the light utilization rate.
It should be noted that, as long as no conflict arises, the embodiments provided by the present application can be freely combined, and the present application is not specifically enumerated herein.
The application also provides an electronic device 2, please refer to fig. 13, fig. 13 is a schematic top view of the electronic device according to an embodiment of the application. The electronic device 2 includes a housing 21 and the electronic paper display panel 1 as described above, where the housing 21 is used to carry the electronic paper display panel 1. Specifically, the electronic paper display panel 1 is described above, and the disclosure is not repeated here.
It should be noted that, in the embodiment of the present application, the electronic device 2 may be an electronic device 2 such as a television, a mobile phone, a smart phone, a tablet computer, an electronic reader, a portable device when worn, a notebook computer, etc., which may communicate with a data transfer server through the internet, where the data transfer server may be an instant messaging server, an SNS (Social Networking Services, social network service) server, etc., and the embodiment of the present application is not limited thereto.
It can be appreciated that in this embodiment, by multiplexing the electronic paper substrate 1a as the light guide plate of the electronic paper display panel 1, the screen thickness of the electronic paper display panel 1 is effectively reduced, and at the same time, the cost of separately manufacturing the light guide plate is reduced, thereby reducing the thickness of the electronic device 2 and the cost of the electronic device 2, and the arrangement of the reflecting member 14 improves the light utilization rate and the display effect of the electronic device 2.
While specific examples have been described herein for the purpose of illustrating the principles and embodiments of the present application, the above description is only for the purpose of aiding in the understanding of the core concept of the present application, and it is to be understood that the present application is not limited to the specific embodiments and application ranges given by those skilled in the art in light of the present teaching.