CN117492305A - Display panel and display terminal - Google Patents

Display panel and display terminal Download PDF

Info

Publication number
CN117492305A
CN117492305A CN202311444436.5A CN202311444436A CN117492305A CN 117492305 A CN117492305 A CN 117492305A CN 202311444436 A CN202311444436 A CN 202311444436A CN 117492305 A CN117492305 A CN 117492305A
Authority
CN
China
Prior art keywords
layer
sub
display
substrate
display panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311444436.5A
Other languages
Chinese (zh)
Inventor
施佼佼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
TCL China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TCL China Star Optoelectronics Technology Co Ltd filed Critical TCL China Star Optoelectronics Technology Co Ltd
Priority to CN202311444436.5A priority Critical patent/CN117492305A/en
Publication of CN117492305A publication Critical patent/CN117492305A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/16755—Substrates
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/16757—Microcapsules
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1676—Electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1677—Structural association of cells with optical devices, e.g. reflectors or illuminating devices

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The application discloses a display panel and a display terminal. The display panel comprises a first substrate, a second substrate, a display medium and at least one reflecting layer; the display medium is arranged between the first substrate and the second substrate; the reflecting layer is arranged on one side of the display medium, which is away from the first substrate, and comprises a first sub-layer and a second sub-layer which are arranged in a stacked manner, and the second sub-layer is arranged on one side of the first sub-layer, which is away from the display medium; the refractive index of the first sub-layer is greater than the refractive index of the second sub-layer. This application is through setting up at least one reflection stratum, and the reflection stratum includes the first sublayer of range upon range of and second sublayer, because the refracting index of first sublayer is greater than the refracting index of second sublayer, when light from first base plate incidence to the reflection stratum, partial light can take place total reflection on the interface of first sublayer and second sublayer to make light reflection to display medium, improved the reflectivity of light, thereby promote the utilization ratio of display panel to ambient light and promote display brightness.

Description

Display panel and display terminal
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display terminal.
Background
The technical field of display includes various types of display panels, wherein the electronic paper display panel can utilize ambient light for display, and low power consumption can be realized. The electronic paper display panel has bistable property, can display two states of bright state and dark state under the condition of no voltage application, and can continuously display the states. Therefore, the electronic paper display panel can be widely applied to scenes displayed by static pictures.
Because the electronic paper displays by using the ambient light, when the utilization rate of the electronic paper to the light is higher, the brightness of the picture is higher, and the display effect is better. How to improve the utilization ratio of the electronic paper to the ambient light, so as to improve the display brightness is one of the technical problems to be solved by those skilled in the art.
Disclosure of Invention
The application provides a display panel and display terminal to promote the utilization ratio of display panel to ambient light, thereby promote display brightness.
In order to solve the technical problems, the technical scheme provided by the application is as follows:
the application provides a display panel, the display panel includes:
a first substrate;
a second substrate spaced apart from and facing the first substrate;
a display medium disposed between the first substrate and the second substrate;
the display device comprises a first substrate, at least one reflecting layer, a second substrate and a display medium, wherein the first substrate is arranged on the display medium, the second substrate is arranged on the display medium, the at least one reflecting layer is arranged on one side of the display medium, which is away from the first substrate, and the reflecting layer comprises a first sub-layer and a second sub-layer which are arranged in a stacked mode, and the second sub-layer is arranged on one side of the first sub-layer, which is away from the display medium;
wherein the refractive index of the first sub-layer is greater than the refractive index of the second sub-layer.
In the display panel of the present application, the reflective layer further includes a third sub-layer, the third sub-layer is disposed on a side of the second sub-layer facing away from the first sub-layer, and a refractive index of the second sub-layer is greater than a refractive index of the third sub-layer.
In the display panel of the application, the display panel comprises a pixel electrode and a protective layer, wherein the pixel electrode is arranged on one side, close to the display medium, of the second substrate, the protective layer is arranged on one side, close to the display medium, of the pixel electrode, and the protective layer is in contact with the pixel electrode.
In the display panel of the application, the reflection layer is arranged on one side, close to the display medium, of the protection layer, and the oxygen element content of the protection layer is smaller than that of the reflection layer.
In the display panel of the application, the protective layer is disposed in contact with the reflective layer, and the refractive index of a sub-layer of the reflective layer adjacent to the protective layer is smaller than that of the protective layer.
In the display panel of the application, the reflective layer is disposed on a side of the second substrate facing away from the display medium.
In the display panel of the application, at least part of the surfaces of the interfaces of any two adjacent first sublayers and second sublayers form an included angle with the display surface of the display panel, and the included angle is larger than 0 degrees and smaller than 180 degrees.
In the display panel, the interface of the first sub-layer and the second sub-layer comprises a plurality of arc surfaces, and the circle center of the arc surfaces is positioned on one side, close to the display medium, of the interface of the first sub-layer and the second sub-layer.
In the display panel of the application, the display panel comprises a plurality of sub-pixels, a plurality of arc surfaces are distributed along a first direction, and the width of each sub-pixel is smaller than that of each arc surface in the first direction.
The application also provides a display terminal, which comprises the display panel.
The beneficial effects are that: the application discloses a display panel and a display terminal. The display panel comprises a first substrate, a second substrate, a display medium and at least one reflecting layer, wherein the second substrate is spaced from and opposite to the first substrate; the display medium is arranged between the first substrate and the second substrate; the reflecting layer is arranged on one side of the display medium, which is away from the first substrate, and comprises a first sub-layer and a second sub-layer which are arranged in a stacked manner, and the second sub-layer is arranged on one side of the first sub-layer, which is away from the display medium; wherein the refractive index of the first sub-layer is greater than the refractive index of the second sub-layer. This application is through setting up at least one reflection stratum in one side that display medium deviates from first base plate, and the reflection stratum is including first sublayer and the second sublayer of range upon range of, because the refracting index of first sublayer is greater than the refracting index of second sublayer, when light from first base plate incidence to the reflection stratum, partial light can take place total reflection on the interface of first sublayer and second sublayer to make light reflection to display medium, improved the reflectivity of light, thereby promote the utilization ratio of display panel to ambient light and promote display brightness.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a first cross-sectional structure of the display panel at C-C in FIG. 1;
FIG. 3 is an enlarged schematic view of a first partial structure of FIG. 2;
FIG. 4 is an enlarged schematic view of a second partial structure of FIG. 2;
fig. 5 is a schematic diagram of a second cross-sectional structure of the display panel at C-C in fig. 1.
Reference numerals illustrate:
the display area AA, the non-display area NA, the sub-pixel 1, the first substrate 10, the color film layer 11, the common electrode 12, the support structure 13, the second substrate 20, the array layer 21, the thin film transistor 210, the gate electrode 211, the source drain electrode 212, the active portion 213, the bank structure 22, the light shielding layer 214, the display medium 30, the reflective layer 40, the first sub-layer 41, the second sub-layer 42, the third sub-layer 43, the refractive index n1 of the first sub-layer, the refractive index n2 of the second sub-layer, the refractive index n3 of the third sub-layer, the pixel electrode 50, the protective layer 60, the filling portion 45, and the first direction D1.
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. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application. In this application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
The present application provides a display panel, as shown in fig. 1 and 2, the display panel includes a first substrate 10, a second substrate 20, a display medium 30, and at least one reflective layer 40, where the second substrate 20 is spaced from and opposite to the first substrate 10; the display medium 30 is disposed between the first substrate 10 and the second substrate 20; the reflective layer 40 is disposed on a side of the display medium 30 facing away from the first substrate 10, the reflective layer 40 includes a first sub-layer 41 and a second sub-layer 42 that are stacked, and the second sub-layer 42 is disposed on a side of the first sub-layer 41 facing away from the display medium 30; wherein the refractive index n1 of the first sub-layer is greater than the refractive index n2 of the second sub-layer.
As shown in fig. 1, the display panel includes a display area AA and a non-display area NA disposed around the display area AA, the display area AA is provided with a plurality of sub-pixels 1, and the display area AA is used for displaying a picture.
In this embodiment, the display panel displays using ambient light. For example, the display panel may be Microcapsule (Microcapsule) type electronic paper, microcup (microcoup) type electronic paper, plasma type electronic paper, or the like, but is not limited thereto.
In the present embodiment, the second substrate 20 and the first substrate 10 may be rigid substrates such as glass, polyethylene terephthalate (PET), etc., but are not limited thereto.
In the present embodiment, as shown in fig. 2, fig. 2 shows a first cross-sectional structure of the display panel. The display panel includes a first substrate 10 and a second substrate 20 which are opposite to each other. The first substrate 10 is provided with a color film layer 11, and the color film layer 11 includes a plurality of first color resistors, a plurality of second color resistors, and a plurality of third color resistors. The first color resistor, the second color resistor and the third color resistor can be one of red color resistor, green color resistor and blue color resistor respectively. By providing the color film layer 11, the display panel can realize color display.
The first substrate 10 is further provided with a common electrode 12, where the common electrode 12 may be disposed on a side of the color film layer 11 facing away from the first substrate 10, and the common electrode is used to provide a common voltage for the sub-pixel 1.
In some embodiments, the color film layer 11 may not be provided, and the display panel may display a black-and-white screen.
In this embodiment, the second substrate 20 is provided with an array layer 21, and the array layer 21 includes a driving circuit for providing driving signals to the sub-pixels 1. Specifically, the driving circuit may include a plurality of thin film transistors 210, and the thin film transistors 210 include a gate electrode 211, a source and drain electrode 212, and an active portion 213. The second substrate 20 is provided with a plurality of pixel electrodes 50, and one pixel electrode 50 corresponds to one sub-pixel 1 of the display panel. One source drain 212 is correspondingly connected to the pixel electrode 50 of one sub-pixel 1, so as to provide a driving signal for the corresponding sub-pixel 1.
Optionally, the array layer 21 further includes a light shielding layer 214, where the light shielding layer 214 may be disposed between the active portion 213 and the reflective layer 40, and the light shielding layer 214 is used to shield the light incident from the first substrate 10 side, so as to prevent the active portion 213 from being electrically degraded due to the influence of light.
The display medium 30 is driven by an electric field formed by the pixel electrode 50 and the common electrode 12, thereby displaying a corresponding picture. The display medium 30 is an inactive light emitting type display material. Display medium 30 may be an electrophoretic substance, such as microcapsules, microcups, plasma, or the like. When the display panel is a bistable electronic paper display panel of other types, the display medium 30 may be bistable substances of other types, which is not limited in this application.
For example, when the display medium 30 is a plasma, the plasma includes white particles capable of displaying white and black particles capable of displaying black, the white particles and the black particles are charged in opposite electric charges, and the white particles and the black particles are collected on the pixel electrode 50 side or the common electrode 12 side by the driving of an electric field, thereby realizing black-and-white screen display.
In the present embodiment, the second substrate 20 is provided with a bank structure 22, and the display medium 30 is disposed in a space surrounded by the bank structure 22. The dam structure 22 may overlie the driving circuit. Specifically, the driving circuit includes a plurality of data lines and a plurality of scanning lines, the data lines and the scanning lines defining the sub-pixels 1. The bank structure 22 is disposed around the pixel electrode 50. The bank structure 22 can cover the data lines and the scan lines without additionally providing an insulating layer to cover the driving circuit, thereby reducing the number of layers of the display panel and reducing the thickness of the display panel. Meanwhile, the driving circuit is not observed on the display surface of the display panel, so that the contrast ratio of the display panel is improved. Because the orthographic projection of the driving circuit on the display surface overlaps with the orthographic projection of the cofferdam structure 22 on the display surface, the occupation space of the driving circuit is saved, and the resolution of the display panel is improved.
Correspondingly, the first substrate 10 is provided with a supporting structure 13, the orthographic projection of the supporting structure 13 on the second substrate 20 is positioned in the cofferdam structure 22, and the supporting structure 13 is abutted against the cofferdam structure 22 to maintain the interval between the second substrate 20 and the first substrate 10, namely, maintain the thickness of the box.
In this embodiment, the orthographic projection of the sub-pixel 1 on the reflective layer 40 is located within the reflective layer 40. That is, the reflective layer 40 corresponds to at least the sub-pixels 1, thereby enabling each sub-pixel 1 to realize display.
In this embodiment, the reflective layer 40 is disposed on a side of the display medium 30 facing away from the first substrate 10, and the reflective layer 40 is used for reflecting light incident from the side of the first substrate 10. The surface of the first substrate 10 facing away from the display medium 30 is a display surface.
The second sub-layer 42 is arranged on the side of the first sub-layer 41 facing away from the display medium 30, when light is incident on the interface between the first sub-layer 41 and the second sub-layer 42 from the side of the first substrate 10. Since the refractive index n1 of the first sub-layer is greater than the refractive index n2 of the second sub-layer, the condition for total reflection of light is Sin θ=n2/n 1, θ being the critical angle. For convenience of description, an interface between the first sub-layer 41 and the second sub-layer 42, where total reflection can occur, is referred to as a critical plane, so that light having an incident angle greater than the critical angle is totally reflected on the critical plane, and the reflected light is incident on the display medium 30, thereby enabling the display medium 30 to implement a display function.
In this embodiment, the first sub-layer 41 may be silicon nitride, and the second sub-layer 42 may be silicon oxide. Wherein the refractive index of silicon nitride is about 3.42 and the refractive index of silicon oxide is about 1.46. The materials of the first sub-layer 41 and the second sub-layer 42 may be other materials, and the refractive index n1 of the first sub-layer is only required to be greater than the refractive index n2 of the second sub-layer.
In the present application, the number of the reflection layers 40 may be set as required, as shown in fig. 1, and fig. 1 shows a case where two reflection layers 40 are laminated. When the number of the reflective layers 40 is larger, the more critical surfaces are, the higher the reflectivity of the reflective layers 40 for light is.
Optionally, in one reflective layer 40, the refractive index of the sub-layer closest to the display medium 30 is greater than the refractive index of the other sub-layers, i.e. the optically dense medium in the reflective layer 40 is on the side of the optically dense medium facing away from the display medium 30. With the above arrangement, the number of critical surfaces can be as large as possible when the number of sub-layers of the reflective layer 40 is constant.
In this application, the thickness of the first sub-layer 41 and the thickness of the second sub-layer 42 may be set as required. For example, the thickness of the first sub-layer 41 and the thickness of the second sub-layer 42 may be 40 micrometers to 100 micrometers, but is not limited thereto.
In the display panel of the present application, as shown in fig. 4, the reflective layer 40 further includes a third sub-layer 43, where the third sub-layer 43 is disposed on a side of the second sub-layer 42 facing away from the first sub-layer 41, and a refractive index n2 of the second sub-layer is greater than a refractive index n3 of the third sub-layer.
In this embodiment, the reflective layer 40 includes a first sub-layer 41, a second sub-layer 42, and a third sub-layer 43 stacked in order, the second sub-layer 42 being located on a side of the first sub-layer 41 facing away from the display medium 30, and the third sub-layer 43 being located on a side of the second sub-layer 42 facing away from the display medium 30. The refractive index n1 of the first sub-layer is greater than the refractive index n2 of the second sub-layer, and the refractive index n2 of the second sub-layer is greater than the refractive index n3 of the third sub-layer.
The material of the first sub-layer 41 may be silicon nitride, the material of the second sub-layer 42 may be titanium oxide, and the material of the third sub-layer 43 may be silicon oxide. The refractive index of titanium oxide is about 2.4. Since the refractive index n1 of the first sub-layer is greater than the refractive index n2 of the second sub-layer, the interface of the first sub-layer 41 and the second sub-layer 42 may constitute a critical plane. Since the refractive index n2 of the second sub-layer is greater than the refractive index n3 of the third sub-layer, the interface between the second sub-layer 42 and the third sub-layer 43 may constitute a critical plane. By the above arrangement, a part of the light can be totally reflected at the critical surfaces of the first sub-layer 41 and the second sub-layer 42, and a part of the light can be totally reflected at the critical surfaces of the second sub-layer 42 and the third sub-layer 43. Therefore, not only can light rays with larger incidence angles be totally reflected, but also light rays with smaller incidence angles can be totally reflected back after passing through the multilayer film layers, and the reflectivity of the light rays is greatly improved.
Further, the reflective layer 40 may also include a fourth sub-layer, a fifth sub-layer, etc., and the number of sub-layers of the reflective layer 40 is not limited in this application. The refractive index of the sub-layers within each reflective layer 40 decreases in turn in the direction from the display medium 30 towards the second substrate 20. That is, the refractive index n3 of the third sub-layer is greater than the refractive index of the fourth sub-layer, which is greater than the refractive index n1 of the first sub-layer. Through the arrangement, the critical angles of all critical surfaces can be different, so that light rays with various incidence angles can be totally reflected after passing through the multilayer film layers.
It should be understood that in some embodiments, the reflective layer 40 may also include a first reflective layer 40 and a second reflective layer 40, where the refractive index of the first reflective layer 40 may be different from the refractive index of the second reflective layer 40. For example, the refractive index n1 of the first sub-layer of the first reflective layer 40 is greater than the refractive index n1 of the first sub-layer of the second reflective layer 40, and the refractive index n2 of the second sub-layer of the first reflective layer 40 is greater than the refractive index n2 of the second sub-layer of the second reflective layer 40, so that the critical angles of the first reflective layer 40 and the second reflective layer 40 are different, and the light with smaller incident angle can be totally reflected after passing through the multi-layer film, thereby improving the reflectivity of the light.
In the display panel of the present application, as shown in fig. 2 to 4, the display panel includes a pixel electrode 50 and a protective layer 60, the pixel electrode 50 is disposed on a side of the second substrate 20 close to the display medium 30, the protective layer 60 is disposed on a side of the pixel electrode 50 close to the display medium 30, and the protective layer 60 is disposed in contact with the pixel electrode 50.
In the present embodiment, the material of the pixel electrode 50 includes ITO (indium tin oxide), IZO (indium zinc oxide), IZTO (indium zinc tin oxide), IAZO (indium aluminum zinc oxide), IGZO (indium gallium zinc oxide), IGTO (indium gallium tin oxide), AZO (aluminum zinc oxide), ATO (antimony tin oxide), IGZTO (indium gallium zinc tin oxide), and the like.
The pixel electrode 50 is provided with a protective layer 60 on one side close to the display medium 30, the protective layer 60 is disposed in contact with the pixel electrode 50 and covers the pixel electrode 50, and the protective layer 60 is used for protecting the pixel electrode 50 to prevent the pixel electrode 50 from being oxidized to affect the conductivity of the pixel electrode 50.
In the present embodiment, the protective layer 60 may be silicon nitride or the like, but is not limited thereto. The protective layer 60 may be a film layer with a low oxygen content.
In the display panel of the present application, the reflective layer 40 is disposed on a side of the protective layer 60 near the display medium 30, and the oxygen content of the protective layer 60 is smaller than the oxygen content of the reflective layer 40. Since the pixel electrode 50 is a metal or a metal oxide, when the pixel electrode 50 is in contact with a film layer having a high oxygen content, the pixel electrode 50 is oxidized, resulting in a decrease in conductivity, which affects the display effect of the display panel.
Therefore, the present embodiment provides the protective layer 60 between the reflective layer 40 and the pixel electrode 50, and makes the oxygen element content of the protective layer 60 smaller than that of the reflective layer 40, thereby reducing the risk of oxidation of the pixel electrode 50.
In other embodiments, the reflective layer 40 may be provided without oxygen or with a lower oxygen content material, so that the protective layer 60 may be omitted.
The oxygen element content refers to a percentage content of the number of oxygen atoms in the film layer, and the oxygen element may be present in the film layer in the form of oxygen atoms or oxygen molecules. When one reflective layer 40 includes one first sub-layer 41 and one second sub-layer 42, the oxygen element content of the reflective layer 40 refers to the amount percentage of total oxygen atoms in the first sub-layer 41 and the second sub-layer 42.
In the display panel of the present application, the protective layer 60 is disposed in contact with the reflective layer 40, and the refractive index of the sub-layer of the reflective layer 40 adjacent to the protective layer 60 is smaller than the refractive index of the protective layer 60.
In this embodiment, the sub-layers of the reflective layer 40 may be the first sub-layer 41, the second sub-layer 42, the third sub-layer 43, and so on. When the reflective layer 40 includes a plurality of sub-layers, the sub-layer of the reflective layer 40 may be any sub-layer of the reflective layer 40. The sub-layer of the reflective layer 40 adjacent to the protective layer 60 refers to the one of the sub-layers of the reflective layer 40 that is in contact with the protective layer 60. By the arrangement, the protection layer 60 can be multiplexed into the optical dense medium layer of the reflection layer 40, and the surface of the protection layer 60, which is away from the display medium 30, can be used as a critical surface, so that the reflectivity of light is further improved. The optical dense medium layer is opposite to the optical dense medium layer, and the refractive index of the optical dense medium layer is larger than that of the optical dense medium layer.
Alternatively, in the present embodiment, the surface of the side of the protective layer 60 facing away from the second substrate 20 is the same as the surface of the side of the reflective layer 40 facing the second substrate 20. When the surface of the protective layer 60 and the surface of the reflective layer 40 close to each other are in contact and have the same surface area, that is, when the surface of the reflective layer 40 is provided with the rugged structure, the surface of the protective layer 60 is provided with the corresponding rugged structure, so that the surface of the reflective layer 40 and the surface of the protective layer 60 close to each other can be fitted to each other.
Alternatively, a surface of the protective layer 60 facing away from the display medium 30 may be planar or may be provided with an uneven structure.
In the present embodiment, the material of the protection layer 60 may be silicon nitride, but is not limited thereto. The protective layer 60 may be a film layer with a low oxygen content.
In some embodiments, as shown in fig. 5, fig. 5 shows a second cross-sectional structure of the display panel. The second cross-sectional structure of the display panel is different from the first cross-sectional structure in the position of the reflective layer 40. In the second cross-sectional structure of the display panel, the reflective layer 40 is disposed on a side of the second substrate 20 facing away from the display medium 30. When the reflective layer 40 is disposed on the side of the second substrate 20 facing away from the display medium 30, compared to the solution where the reflective layer 40 is disposed on the side of the second substrate 20 near the display medium 30, since the light reaching the reflective layer 40 needs to pass through the second substrate 20, part of the light will be lost in the second substrate 20, and therefore, when the reflective layer 40 is disposed on the side of the second substrate 20 facing away from the display medium 30, the reflectivity is reduced. However, in this embodiment, the reflective layer 40 is not in contact with or close to the pixel electrode 50, so that oxidation of the pixel electrode 50 due to oxygen in the reflective layer 40 can be avoided. Therefore, the provision of the protective layer 60 can be omitted.
In this embodiment, the orthographic projections of the thin film transistor 210 and the light shielding layer 214 on the second substrate 20 are all located in the orthographic projection of the bank structure 22 on the second substrate 20, so as to avoid the light shielding of the reflective layer 40 by the thin film transistor 210 and the light shielding layer 214, and influence the normal display of the sub-pixel 1.
In the display panel of the present application, at least part of the surface of the interface between any two adjacent first sub-layers 41 and second sub-layers 42 forms an included angle with the display surface of the display panel, and the included angle is greater than 0 degrees and less than 180 degrees.
In this embodiment, at least the interface between the first sub-layer 41 and the second sub-layer 42 is provided with an uneven microstructure, and by providing the uneven microstructure, the angles of the critical planes of the light rays can be diversified, so that as many light rays as possible satisfy the condition of total reflection, and the light ray reflectivity of the reflective layer 40 is increased.
In this embodiment, the interface of the first sub-layer 41 and the second sub-layer 42 may include microstructures of various shapes, for example, trapezoidal, rectangular, semicircular, triangular, etc. By providing microstructures of various shapes, the incident angle of light on the critical plane can be varied, so that more light is totally reflected, and the light reflectivity of the reflective layer 40 is increased.
It should be understood that the microstructure of the interface of first sub-layer 41 and second sub-layer 42 may be provided as desired. For example, the microstructures may be a continuous arrangement of patterns of the same shape, or a periodic arrangement of patterns of different shapes. The microstructures may be stripe-shaped, and two adjacent microstructures are continuously arranged along a short side of the stripe pattern. The microstructure may also be a block pattern, the plurality of block patterns being arranged in at least two directions.
It should be noted that, in order to make the light in each sub-pixel 1 as uniform as possible, the pattern of the microstructure corresponding to each sub-pixel 1 may be the same, but is not limited thereto.
In the present application, when the interface of the first and second sub-layers 41 and 42 of the reflective layer 40 is provided with the rugged microstructure, the reflective layer 40 may be fabricated using a nanoimprint process, but is not limited thereto. For example, the second sub-film layer may be formed by a film forming process, then the microstructure is formed on the surface of the second sub-film layer by a nanoimprint process, so as to obtain the second sub-layer 42, and then the first sub-layer 41 is formed on the surface of the second sub-layer 42 by a film forming process. The first sub-layer 41 can have the same microstructure as the second sub-layer 42.
In the present application, the film forming process may be physical vapor deposition (Physical Vapor Deposition, PVD), chemical vapor deposition (Chemical Vapor Deposition, CVD), or the like, but is not limited thereto.
In this embodiment, as shown in fig. 2 to 4, the interface between the first sub-layer 41 and the second sub-layer 42 includes a plurality of arc surfaces, and the center of the arc surfaces is located at the side of the interface between the first sub-layer 41 and the second sub-layer 42 near the display medium 30. That is, the microstructure of the interface of the first sub-layer 41 and the second sub-layer 42 may be semicircular in shape, and the center of the semicircle is located at the side of the interface of the first sub-layer 41 and the second sub-layer 42 near the display medium 30. By the above arrangement, the incident angle of the light beam having the same angle with the plane of the second substrate 20 on the semicircular critical surface can be made different, so that the light beam is totally reflected as much as possible, and the light reflectivity of the reflective layer 40 is increased.
Optionally, in some embodiments, a filling portion 45 is further disposed on a surface of the reflective layer 40 near the layer of the display medium 30, and the filling portion 45 fills the upper surface of the reflective layer 40. The refractive index of the material of the filling portion 45 may be higher than that of the material of the reflective layer 40 in contact with the filling portion 45, so that a portion of light may be totally reflected at the contact surface between the filling portion 45 and the reflective layer 40, and the reflectivity of the light may be improved.
Further, the display panel includes a plurality of sub-pixels 1, the plurality of arc surfaces are arranged along the first direction D1, and in the first direction D1, the width of the sub-pixel 1 is smaller than the width of the arc surface. That is, one sub-pixel 1 corresponds to at least one circular arc surface in the first direction D1. By the above arrangement, the light in each sub-pixel 1 can be made incident along various angles, so that as many incident light rays as possible are totally reflected, and the light reflectivity of the reflective layer 40 is increased.
The inventors have found in practice that when the reflective layer 40 comprises a first sub-layer 41 and a second sub-layer 42, and the interface of the first sub-layer 41 and the second sub-layer 42 comprises an arc surface, the first sub-layer 41 is silicon nitride and the second sub-layer 42 is silicon oxide, the reflectivity increases as the number of reflective layers 40 increases. Experiments prove that when the reflecting layer 40 is one layer, the reflectivity of the reflecting layer 40 can reach 78.9%, when the reflecting layer 40 is two layers, the reflectivity of the reflecting layer 40 can reach 82%, and when the reflectivity of the reflecting layer 40 is four layers, the reflectivity of the reflecting layer 40 can reach 90%.
In the display panel of the present application, the display panel may further include a reflection enhancing layer disposed between the reflective layer 40 and the protective layer 60, and the reflection enhancing layer may be made of a material with high reflectivity, such as metallic silver, so as to further increase the reflectivity of the display panel and improve the light utilization rate.
The application also provides a display terminal, which comprises the display panel.
In this embodiment, the display terminal may be: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The display panel and the display terminal provided by the embodiments of the present application are described in detail, and specific examples are applied to illustrate the principles and the implementation of the present application, and the description of the above embodiments is only used to help understand the technical solution and the core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A display panel, comprising:
a first substrate;
a second substrate spaced apart from and facing the first substrate;
a display medium disposed between the first substrate and the second substrate;
the display device comprises a first substrate, at least one reflecting layer, a second substrate and a display medium, wherein the first substrate is arranged on the display medium, the second substrate is arranged on the display medium, the at least one reflecting layer is arranged on one side of the display medium, which is away from the first substrate, and the reflecting layer comprises a first sub-layer and a second sub-layer which are arranged in a stacked mode, and the second sub-layer is arranged on one side of the first sub-layer, which is away from the display medium;
wherein the refractive index of the first sub-layer is greater than the refractive index of the second sub-layer.
2. The display panel of claim 1, wherein the reflective layer further comprises a third sub-layer disposed on a side of the second sub-layer facing away from the first sub-layer, the second sub-layer having a refractive index greater than a refractive index of the third sub-layer.
3. The display panel according to claim 1, wherein the display panel includes a pixel electrode provided on a side of the second substrate close to the display medium and a protective layer provided on a side of the pixel electrode close to the display medium, the protective layer being provided in contact with the pixel electrode.
4. A display panel according to claim 3, wherein the reflective layer is disposed on a side of the protective layer adjacent to the display medium, and the protective layer has an oxygen element content less than that of the reflective layer.
5. The display panel of claim 4, wherein the protective layer is disposed in contact with the reflective layer, and wherein a sub-layer of the reflective layer adjacent to the protective layer has a refractive index less than a refractive index of the protective layer.
6. The display panel of claim 1, wherein the reflective layer is disposed on a side of the second substrate facing away from the display medium.
7. The display panel of claim 1, wherein at least a portion of the surface of the interface of any two adjacent first and second sublayers is at an angle to the display surface of the display panel, the angle being greater than 0 degrees and less than 180 degrees.
8. The display panel of claim 7, wherein the interface of the first sub-layer and the second sub-layer comprises a plurality of circular arc surfaces, and wherein the center of the circular arc surfaces is located on a side of the interface of the first sub-layer and the second sub-layer near the display medium.
9. The display panel of claim 8, wherein the display panel comprises a plurality of sub-pixels, the plurality of circular arc surfaces being arranged along a first direction, the sub-pixels having a width that is less than a width of the circular arc surfaces in the first direction.
10. A display terminal, characterized in that the display terminal comprises a display panel according to any of claims 1 to 9.
CN202311444436.5A 2023-11-01 2023-11-01 Display panel and display terminal Pending CN117492305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311444436.5A CN117492305A (en) 2023-11-01 2023-11-01 Display panel and display terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311444436.5A CN117492305A (en) 2023-11-01 2023-11-01 Display panel and display terminal

Publications (1)

Publication Number Publication Date
CN117492305A true CN117492305A (en) 2024-02-02

Family

ID=89682107

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311444436.5A Pending CN117492305A (en) 2023-11-01 2023-11-01 Display panel and display terminal

Country Status (1)

Country Link
CN (1) CN117492305A (en)

Similar Documents

Publication Publication Date Title
US7580092B2 (en) Liquid crystal display device and method for fabricating the same
US7053974B2 (en) Transflective LCD device having color filters with through holes
US11796870B2 (en) Array substrate, light control panel, and display device
US20070263142A1 (en) Transflective liquid crystal display device
CN106773355B (en) Pixel structure and active element array substrate for display panel
CN108803161B (en) Display panel, method for manufacturing display panel, and display device
EP1189098B1 (en) Liquid crystal device and electronic apparatus provided with the same
WO2022007154A1 (en) Liquid crystal display panel
US20050128390A1 (en) Transflective fringe field switching liquid crystal display
US7414685B2 (en) Transflective fringe field switching liquid crystal display
US20080273130A1 (en) Display device
JP2005148740A (en) Reflection type liquid crystal display of dual display
CN109298568B (en) Array substrate, display panel and display device
JP4017499B2 (en) Liquid crystal display
CN114527596B (en) Display panel and mobile terminal
JP2009053389A (en) Semitransmission liquid crystal display panel and electronic device
JP2005062760A (en) Electrooptical device and electronic device
CN117492305A (en) Display panel and display terminal
CN110618550B (en) Display panel and manufacturing method thereof
JP4511248B2 (en) Liquid crystal display
US20080043183A1 (en) Transflective pixel structure in LCD panel and method for fabricating the same
US20240319552A1 (en) Display substrate, display panel and display device
JP2018091914A (en) Display
JP2005055645A (en) Liquid crystal display element
CN117850089A (en) Display substrate, display panel and display device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination