CN114582234A - Display panel, driving method thereof, display module and display device - Google Patents

Display panel, driving method thereof, display module and display device Download PDF

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Publication number
CN114582234A
CN114582234A CN202210208345.0A CN202210208345A CN114582234A CN 114582234 A CN114582234 A CN 114582234A CN 202210208345 A CN202210208345 A CN 202210208345A CN 114582234 A CN114582234 A CN 114582234A
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Prior art keywords
display
display panel
light
film layer
driving
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CN202210208345.0A
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CN114582234B (en
Inventor
陈娴
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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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
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/023—Display panel composed of stacked panels

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Optics & Photonics (AREA)
  • Molecular Biology (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electroluminescent Light Sources (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

The embodiment of the invention provides a display panel, a driving method thereof, a display module and a display device, relates to the technical field of display, and aims to enrich the functions of the display panel, ensure the display effect of the display panel when different functions are realized and reduce the use power consumption of the display panel. The display panel comprises a first display film layer and a second display film layer; the first display film layer and the second display film layer are arranged in a stacked mode along the direction perpendicular to the plane where the display panel is located; the first display film layer comprises a light emitting layer, the second display film layer comprises an electrophoretic unit, and the electrophoretic unit comprises a plurality of electrophoretic particles; the electrophoretic cell does not overlap the light-emitting layer in a direction perpendicular to the plane of the display panel.

Description

Display panel, driving method thereof, display module and display device
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel, a driving method of the display panel, a display module and a display device.
[ background ] A method for producing a semiconductor device
In recent years, with the development of display technology, the demand of consumers for display screens is increasing. Currently, active display panels, including Organic Light-Emitting Diode (OLED) display panels, are widely used in the display technology field due to their advantages, such as active Light emission, high contrast, no viewing angle limitation, etc. However, at present, the display panel has a single use function, and there is a problem in that power consumption is large when displaying an image such as a character.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel, a display module, a display device, and a driving method of the display panel, so as to enrich functions of the display panel, ensure display effects of the display panel when different functions are implemented, and reduce power consumption of the display panel.
In one aspect, an embodiment of the present invention provides a display panel, including a first display film layer and a second display film layer; the first display film layer and the second display film layer are arranged in a stacked mode along the direction perpendicular to the plane where the display panel is located;
the first display film layer comprises a light emitting layer, the second display film layer comprises an electrophoretic unit, and the electrophoretic unit comprises a plurality of electrophoretic particles; the electrophoretic cell does not overlap the light-emitting layer in a direction perpendicular to the plane of the display panel.
On the other hand, the embodiment of the invention provides a display module, which comprises an optical film layer and the display panel, wherein the optical film layer is positioned on the light emergent side of the display panel;
the optical film layer comprises a first area and a second area, and the light transmittance of the first area is smaller than that of the second area; the first region overlaps the light-emitting layer and the second region overlaps the electrophoretic cell in a direction perpendicular to a plane in which the display panel is located.
In another aspect, an embodiment of the present invention provides a display device, including the display module described above.
In another aspect, an embodiment of the present invention provides a driving method of a display panel, where the display panel includes a first display film layer and a second display film layer; the first display film layer and the second display film layer are arranged in a stacked mode along the direction perpendicular to the plane where the display panel is located;
the first display film layer comprises a light emitting layer, the second display film layer comprises an electrophoretic unit, and the electrophoretic unit comprises a plurality of electrophoretic particles; the electrophoresis unit and the luminous layer are not overlapped along the direction vertical to the plane of the display panel;
the working modes of the display panel comprise a first working mode and a second working mode;
the driving method comprises the following steps:
in a first working mode, controlling the light-emitting layer to light up; controlling the second display film layer to be in a black state;
and under the second working mode, controlling the light-emitting layer not to be lightened, and controlling the second display film layer to display a preset picture.
According to the display panel, the driving method thereof, the display module and the display device provided by the embodiment of the invention, the first display film layer and the second display film layer are arranged in the display panel, so that the first display film layer and the second display film layer can be respectively displayed to meet the display requirements of different types of pictures when the display panel works. So set up, when richening display panel's service function, also can be according to treating that the display screen selects suitable demonstration rete, when guaranteeing display panel's display effect, still can make display panel have lower consumption.
In addition, in the direction perpendicular to the plane of the display panel, the electrophoretic unit and the light-emitting layer are not overlapped, so that the light emitted by the light-emitting layer is prevented from being influenced by the electrophoretic unit in the process of emitting the light out of the display panel, the external light is prevented from being influenced by the light-emitting layer in the process of emitting the light to the electrophoretic unit and the light reflected by the electrophoretic unit out of the display panel, and the first display film layer and the second display film layer can both show good display effects.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described 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 top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view along AA' of FIG. 1;
FIG. 3 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 4 is another schematic cross-sectional view along AA' of FIG. 1;
FIG. 5 is a schematic top view illustrating a display panel according to another embodiment of the present invention;
FIG. 6 is a further schematic cross-sectional view along AA' of FIG. 1;
fig. 7 is a schematic cross-sectional view of a display module according to an embodiment of the invention;
FIG. 8 is a schematic cross-sectional view of another display module according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a display device according to an embodiment of the invention.
[ detailed description ] A
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe display film layers in embodiments of the present invention, these display film layers should not be limited by these terms. These terms are only used to distinguish the display film layers from each other. For example, the first display film layer may also be referred to as the second display film layer, and similarly, the second display film layer may also be referred to as the first display film layer without departing from the scope of embodiments of the present invention.
An embodiment of the invention provides a display panel, as shown in fig. 1, fig. 1 is a schematic top view of the display panel provided in the embodiment of the invention, and the display panel includes a first pixel P1 and a second pixel P2.
When the first pixel P1 and the second pixel P2 are disposed, as shown in fig. 2, fig. 2 is a schematic cross-sectional view taken along line AA' of fig. 1, and the first display film layer 1 and the second display film layer 2 may be disposed in the display panel according to the embodiment of the invention. Along the direction of the plane perpendicular to the display panel, the first display film layer 1 and the second display film layer 2 are arranged in a stacked mode.
The first display film layer 1 includes the first pixel P1, the first pixel P1 includes a light emitting device, and the light emitting device includes a light emitting layer 10. Alternatively, the light emitting layer 10 may include any one of an organic light emitting material, an inorganic light emitting material, and a quantum dot light emitting material. When the first display film layer 1 is used for displaying, a voltage may be applied to both sides of the light emitting layer 10 to cause the light emitting layer 10 to emit light.
The second display film layer 2 includes a second pixel P2. Wherein the second pixel P2 comprises an electrophoretic cell 20. The electrophoretic cell 20 includes an electrophoretic fluid and a plurality of electrophoretic particles dispersed in the electrophoretic fluid. Alternatively, the electrophoretic particles may be configured to include black electrophoretic particles and white electrophoretic particles. Alternatively, the electrophoretic particles may be provided in other colors. When the second display film layer 2 is used for displaying, an electric field may be applied to two sides of the electrophoretic cell 20, so that the electrophoretic particles with electric properties move to corresponding positions under the action of the electric field, and display of characters, patterns and the like is realized through reflection of external light by the electrophoretic particles. In the embodiment of the invention, the second display film layer 2 can present a display effect close to paper when displaying, so that a user can have an excellent reading experience.
In the embodiment of the present invention, as shown in fig. 1 and 2, the first pixel P1 does not overlap with the second pixel P2 in a direction perpendicular to a plane in which the display panel is located. Specifically, the electrophoretic cell 20 does not overlap with the light emitting layer 10.
Illustratively, the operation modes of the display panel include a first operation mode and a second operation mode. When the display panel works, in the first working mode, the embodiment of the invention can only enable the first display film layer 1 to display. Specifically, the embodiment of the invention can control the first pixel P1 to light, i.e., control the light emitting layer 10 in the first display film layer 1 to emit light, and control the second display film layer 2 to be in a black state. In the second operation mode, the embodiment of the present invention may only enable the second display film layer 2 to display. Specifically, the embodiment of the invention may control the first pixel P1 not to be lit, that is, the light emitting layer 10 in the first display film layer 1 not to emit light, and the second display film layer 2 to display the preset picture.
When the display panel is used for displaying, the display panel can be controlled to be in a first working mode or a second working mode according to the type of a picture to be displayed. For example, when the display panel needs to display a dynamic picture such as a video or animation, the display panel may be controlled to be in the first operation mode. When the display panel is required to display reading pictures such as characters, the display panel can be controlled to be in the second working mode, the display effect is ensured, and meanwhile, the power consumption of the display panel can be reduced.
According to the embodiment of the invention, the first display film layer 1 and the second display film layer 2 are arranged in the display panel, so that the first display film layer 1 and the second display film layer 2 can be respectively displayed to meet the display requirements of different types of pictures when the display panel works. So set up, when richening display panel's service function, also can be according to treating that the display screen selects suitable demonstration rete, when guaranteeing display panel's display effect, still can make display panel have lower consumption.
In addition, in the direction perpendicular to the plane of the display panel, the electrophoretic cell 20 and the light-emitting layer 10 are not overlapped, so that the light emitted by the light-emitting layer 10 is prevented from being influenced by the electrophoretic cell 20 in the process of emitting the light out of the display panel, and the external light is prevented from being influenced by the light-emitting layer 10 in the process of emitting the light emitted to the electrophoretic cell 20 and reflected by the electrophoretic cell 20 out of the display panel, so that the first display film layer 1 and the second display film layer 2 can both present a good display effect.
It should be noted that the shape, area and arrangement of the first pixel P1 and the second pixel P2 shown in fig. 1 are only illustrative, and may be adjusted according to different design requirements during the actual design process of the display panel, which is not limited in the embodiment of the present invention.
Optionally, as shown in fig. 2, in the embodiment of the present invention, the second display film layer 2 is located on a side of the first display film layer 1 close to the light emitting side of the display panel. The light exit direction of the display panel in fig. 2 is indicated by an arrow. When the second display film layer 2 is used for displaying, external environment light enters the display panel, the electrophoretic particles in the electrophoretic unit 20 reflect the external environment light, and the reflected light exits the display panel and enters human eyes, so that a user can view an image displayed by the second display film layer 2. In the embodiment of the invention, the second display film layer 2 is positioned on the side of the first display film layer 1 close to the light-emitting side of the display panel, so that the number of film layers through which external environment light enters the second display film layer 2 can be reduced, the loss of incident light is reduced, the number of film layers through which light reflected by the second display film layer 2 is emitted out of the display panel is reduced, the loss of emergent light is reduced, and the display effect of the second display film layer 2 is favorably ensured.
Optionally, as shown in fig. 2, the first display film layer 1 further includes a first light emitting electrode 11 and a second light emitting electrode 12; the light-emitting layer 10 is located between the first light-emitting electrode 11 and the second light-emitting electrode 12 in a direction perpendicular to the plane of the display panel. When the first display film layer 1 is used for displaying, the first light emitting electrode 11 and the second light emitting electrode 12 respectively receive an electrical signal, and holes and electrons generated by the two electrodes are respectively injected into the light emitting layer 10. The holes and the electrons are recombined in the light emitting layer 10 to generate excitons, which radiate from an excited state to a ground state, so that the light emitting layer 10 emits light of a corresponding color. For example, the first light emitting electrode 11 may be an anode, and the second light emitting electrode 12 may be a cathode; alternatively, the first light emitting electrode 11 is a cathode, and the second light emitting electrode 12 is an anode, which is not limited in the embodiment of the present invention.
Illustratively, as shown in fig. 2, the second display film layer 2 further includes a first driving electrode 21 and a second driving electrode 22; the electrophoretic cell 20 is located between the first drive electrode 21 and the second drive electrode 22 in a direction perpendicular to the plane of the display panel. When the second display film layer 2 is used for displaying, the first driving electrode 21 and the second driving electrode 22 respectively receive an electrical signal to form a corresponding voltage difference between the first driving electrode 21 and the second driving electrode 22. The electrophoretic particles in the electrophoretic cell 20 move to corresponding positions under the action of the pressure difference, so that the second display film layer 2 displays a desired picture.
When the first light-emitting electrodes 11 and the second light-emitting electrodes 12 are disposed, for example, as shown in fig. 2, the embodiment of the invention may make the first light-emitting electrodes 11 corresponding to different first pixels P1 independent from each other, and make the second light-emitting electrodes 12 corresponding to a plurality of first pixels P1 connected to each other. For example, the second light emitting electrode 12 may be disposed in a structure covering the entire surface of the plurality of light emitting layers 10 to reduce a voltage drop generated by signal transmission on the second light emitting electrode 12. When the first display film layer 1 is used for displaying, the embodiment of the invention can provide different light emitting currents to the first pixels P1 by differentially setting the voltages applied to the first light emitting electrodes 11 of the first pixels P1, so that the different first pixels P1 realize different light emitting luminances.
For example, as shown in fig. 2, the second light-emitting electrode 12 may be located on a side of the light-emitting layer 10 close to the light-emitting side of the display panel according to the embodiment of the present invention. Optionally, in the embodiment of the present invention, the first light-emitting electrode 11 includes a reflective layer, and the second light-emitting electrode 12 includes a transflective layer, so as to form a microcavity structure between the first light-emitting electrode 11 and the second light-emitting electrode 12, and improve the light-emitting efficiency and the color purity of the light emitted by the light-emitting layer 10.
Illustratively, as shown in fig. 2, the display panel further includes a driving circuit layer 3, and the driving circuit layer 3 includes a pixel driving circuit electrically connected to the first light emitting electrode 11. Specifically, as shown in fig. 2, the pixel driving circuit includes a thin film transistor 30. Note that the number of the thin film transistors 30 in the driving circuit layer 3 may be two or more. Fig. 2 illustrates only one thin film transistor 30 electrically connected to the first light emitting electrode 11.
When the first driving electrodes 21 and the second driving electrodes 22 are disposed, for example, as shown in fig. 2 and fig. 3, fig. 3 is a schematic top view of another display panel provided in the embodiment of the present invention, the second driving electrodes 22 corresponding to different second pixels P2 may be independent from each other, and the first driving electrodes 21 corresponding to a plurality of second pixels P2 may be connected to each other, that is, the first driving electrodes 21 are also disposed in a similar whole-surface structure as the second light emitting electrodes 12, so as to reduce a voltage drop generated by signal transmission on the first driving electrodes 21. When the second display film layer 2 is used for displaying, the embodiment of the invention can implement the voltage difference required by the respective displays of the different second pixels P2 by differentially setting the voltage applied to the second driving electrodes 22 of the respective second pixels P2.
Optionally, as shown in fig. 3, the display panel further includes a first driving lead 31 and a second driving lead 32; the first driving electrode 21 is electrically connected to an electrophoresis driving chip (not shown) through a first driving lead 31; the second driving electrode 22 is electrically connected to the electrophoresis driving chip through a second driving lead 32. When the second display film layer of the display panel is used for displaying, the electrophoretic driving chip provides corresponding driving signals to the first driving electrode 21 and the second driving electrode 22 through the first driving lead 31 and the second driving lead 32, respectively.
When the first driving lead 31 and the second driving lead 32 are disposed, for example, the embodiment of the invention may dispose the first driving lead 31 and/or the second driving lead 32 on the second display film layer 2 to reduce the distance between the first driving lead 31 and the first driving electrode 21, so as to facilitate the connection between the first driving lead 31 and the first driving electrode 21; and/or, reducing the distance between the second drive lead 32 and the second drive electrode 22 facilitates the connection of the second drive lead 32 to the second drive electrode 22.
As shown in fig. 3, the first driving lead 31 and the second driving lead 32 are not overlapped with the light emitting layer 10 along a direction perpendicular to the plane of the display panel, so as to prevent the arrangement of the first driving lead and the second driving lead 32 from affecting the light emitting of the light emitting layer 10.
For example, when the second driving electrode 22 is disposed on the side of the electrophoretic cell 20 close to the light-emitting side of the display panel, the embodiment of the invention may select a transparent metal oxide to fabricate the second driving electrode 22, so as to increase the intensity of the external light incident to the electrophoretic cell 20 through the second driving electrode 22 and increase the intensity of the reflected light emitted from the second driving electrode 22 and reflected by the electrophoretic cell 20.
For example, as shown in fig. 4, fig. 4 is another schematic cross-sectional view along AA' of fig. 1, when the second light-emitting electrode 12 is located on a side of the light-emitting layer 10 close to the electrophoretic cell 20, and the first driving electrode 21 is located on a side of the electrophoretic cell 20 close to the light-emitting layer 10, the second light-emitting electrode 12 may be reused as the first driving electrode 21 in the embodiment of the present invention, so as to reduce the number of film layers in the display panel and reduce the thickness of the display panel.
Exemplarily, as shown in fig. 5, fig. 5 is a schematic top view of a display panel according to another embodiment of the present invention, the display panel includes a plurality of first driving electrode groups 210 and a plurality of second driving electrode groups 220, the first driving electrode groups 210 include a plurality of first driving electrodes 21 connected to each other and arranged along a first direction h1, and the first driving electrodes 21 overlap with the electrophoretic cells along a direction perpendicular to a plane of the display panel. The second driving electrode group 220 includes a plurality of second driving electrodes 22 connected to each other and arranged in the second direction h 2; the first direction h1 intersects the second direction h 2. The second drive electrode 22 overlaps the electrophoretic cell in a direction perpendicular to the plane of the display panel. For example, as shown in fig. 5, the first driving electrode group 210 may be formed in a stripe structure extending in the first direction h1, and the second driving electrode group 220 may be formed in a stripe structure extending in the second direction h 2.
When the first driving lead 31 and the second driving lead 32 are provided, as shown in fig. 5, the embodiment of the invention may electrically connect the first driving lead 31 with the first driving electrode 21 located at the end portion of the first driving electrode group 210, and electrically connect the second driving lead 32 with the second driving electrode 22 located at the end portion of the second driving electrode group 220.
When the second display film layer 2 is driven to display, the embodiment of the invention may sequentially apply the corresponding first driving signal to each first driving electrode group 210 through the plurality of first driving wires 31, and sequentially apply the corresponding second driving signal to each second driving electrode group 220 through the plurality of second driving wires 32, so that the electrophoretic particles between the first driving electrodes 21 and the second driving electrodes 22 may move under the corresponding voltage difference. So set up, be favorable to reducing the quantity of first drive lead 31 and second drive lead 32, be favorable to reducing the setting degree of difficulty of first drive lead 31 and second drive lead 32 to be favorable to narrowing display panel's frame.
Optionally, in the embodiment of the present invention, an area of the orthographic projection of the first driving electrode 21 on the plane where the display panel is located is greater than or equal to an area of the orthographic projection of the electrophoretic cell 20 on the plane where the display panel is located, and an area of the orthographic projection of the second driving electrode 22 on the plane where the display panel is located is greater than or equal to an area of the orthographic projection of the electrophoretic cell 20 on the plane where the display panel is located. Fig. 2 is a schematic diagram illustrating that the area of the orthogonal projection of the first driving electrode 21 on the plane of the display panel is larger than the area of the orthogonal projection of the electrophoretic cell 20 on the plane of the display panel, and the area of the orthogonal projection of the second driving electrode 22 on the plane of the display panel is larger than the area of the orthogonal projection of the electrophoretic cell 20 on the plane of the display panel. The embodiment of the invention can ensure that the electrophoretic particles at different positions in the electrophoretic cell 20 can be subjected to a uniform electric field when the second display film layer 2 is driven for displaying by making the first driving electrode 21 and the second driving electrode 22 have larger areas.
Optionally, when the area of the forward projection of the first driving electrode 21 and the second driving electrode 22 on the plane of the display panel is larger than the area of the forward projection of the electrophoretic cell 20 on the plane of the display panel, the embodiment of the present invention may make the distance between the edge of the first driving electrode 21 and the edge of the electrophoretic cell 20 closest to the edge of the first driving electrode be greater than or equal to 1 μm, and make the distance between the edge of the second driving electrode 22 and the edge of the electrophoretic cell 20 closest to the edge of the first driving electrode be greater than or equal to 1 μm.
Optionally, as shown in fig. 2 and fig. 4, the first display film layer 1 further includes a pixel defining layer 13, the pixel defining layer 13 includes an opening 130, and the light emitting layer 10 is located in the opening 130; the electrophoretic cell 20 does not overlap the opening 130 in a direction perpendicular to the plane of the display panel.
Exemplarily, as shown in fig. 2 and 4, the display panel further includes a protective layer 4; the protective layer 4 is located between the luminescent layer 10 and the electrophoretic cell 20 in a direction perpendicular to the plane of the display panel. Illustratively, the protective layer 4 may be formed by a chemical vapor deposition process or the like. The protective layer 4 may function to protect the light emitting layer 10. Optionally, the thickness T of the protective layer 4 satisfies: t is more than or equal to 0.1 mu m and less than or equal to 1 mu m. In the embodiment of the invention, the thickness T of the protective layer 4 is set to be more than or equal to 0.1 μm, so that on one hand, the thickness of the protective layer 4 is not too small, and the protective layer 4 is ensured to have a better protective effect on the light-emitting layer 10; on the other hand, the embodiment of the invention can avoid setting the thickness of the protective layer 4 to be too large by setting the thickness T of the protective layer 4 to be less than or equal to 1 μm, and can avoid the distance between the electrophoretic cell 20 and the first driving electrode 21 to be too large when the second light-emitting electrode 12 is multiplexed as the first driving electrode 21, which is beneficial to ensuring that the electric field intensity applied to the two sides of the electrophoretic cell 20 is not affected.
Optionally, as shown in fig. 2 and 4, the display panel further includes a protective cover 5. For example, in manufacturing the display panel, the second driving electrode 22 and the electrophoretic cell 20 may be sequentially formed on one side of the protective cover 5. After the first display film layer 1 and the second display film layer 2 are prepared, the two are aligned and attached.
Optionally, as shown in fig. 6, fig. 6 is another schematic cross-sectional view along AA' of fig. 1, the display panel further includes a color-resisting layer 6, and the color-resisting layer 6 is located on a side of the second display film layer 2 away from the first display film layer 1; the color resistance layer 6 includes a plurality of color resistance units 60; the color resistance unit 60 overlaps the light emitting layer 10, and the color resistance unit 60 does not overlap the electrophoretic unit 20 in a direction perpendicular to a plane of the display panel. The color resistance unit 60 can improve the color purity of the light emitted from the first display film layer 1, and can reduce the intensity of the reflected ambient light emitted from the display panel, thereby improving the contrast of the image displayed on the first display film layer 1. Meanwhile, in the embodiment of the present invention, the color resistance unit 60 is disposed to avoid the electrophoretic cell 20, so that the intensity of the ambient light incident to the electrophoretic cell 20 and the emission intensity of the ambient light reflected by the electrophoretic cell 20 are not affected.
An embodiment of the present invention further provides a display module, as shown in fig. 7, and fig. 7 is a schematic cross-sectional view of the display module provided in the embodiment of the present invention, where the display module includes an optical film layer 7 and the display panel 100, and the optical film layer 7 is located on a light emergent side of the display panel 100.
The optical film layer 7 comprises a first area A1 and a second area A2, wherein the light transmittance of the first area A1 is less than that of the second area A2; the first region a1 overlaps the light emitting layer 10, and the second region a2 overlaps the electrophoretic cell 20 in a direction perpendicular to the plane of the display panel.
Exemplarily, the optical film 7 may be selected according to a design requirement of the display module, for example, the optical film 7 may be a color adjusting layer for adjusting a color of the light emitted from the first display film 1, or may be a light intensity adjusting layer for adjusting an intensity of the light emitted from the first display film 1. The embodiment of the present invention is not limited thereto.
According to the embodiment of the invention, the optical film layer 7 is arranged in the display module, so that the characteristics of light rays emitted from the display module can be improved. In addition, in the embodiment of the invention, the optical film 7 is divided into the first area a1 and the second area a2, and the second area a2 with a relatively high light transmittance is made to correspond to the electrophoretic cell 20, so that the intensity of light entering the electrophoretic cell 20 through the optical film 7 can be ensured, and the intensity of light emitted by the electrophoretic cell 20 after the light reflected by the optical film 7 exits through the optical film 7 can be improved.
Optionally, as shown in fig. 8, fig. 8 is a schematic cross-sectional view of another display module according to an embodiment of the invention, in which the optical film 7 includes a linear polarizer 71 and a wave plate 72, the linear polarizer 71 is located in the first area a1, and the linear polarizer 71 is located on a side of the wave plate 72 away from the display panel 100. The linear polarizer 71 is used to linearly polarize incident natural light. Illustratively, the wave plate 72 may be a quarter wave plate. The arrangement of the linear polarizer 71 and the wave plate 72 can reduce the intensity of the ambient light emitted from the first region a1, and can improve the contrast of the picture displayed by the first display film layer 1.
For example, as shown in fig. 8, the embodiment of the present invention may provide a via hole 710 in the linear polarizer 71, wherein the via hole 710 penetrates through the linear polarizer 71, and the via hole 710 is located in the second region a2, so as to achieve high transmittance of the second region a 2.
Optionally, as shown in fig. 8, the optical film 7 further includes an adhesive layer 73, where the adhesive layer 73 is used to adhere the linear polarizer 71 and the wave plate 72, and to adhere the optical film 7 and the display panel 100.
The embodiment of the invention also provides a display device which comprises the display module. As shown in fig. 9, fig. 9 is a schematic view of a display device according to an embodiment of the present invention, where the display device includes the display module 1000. The specific structure of the display module 1000 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 9 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, or a television.
An embodiment of the present invention further provides a driving method of a display panel, as shown in fig. 1 and fig. 2, the display panel includes a first display film layer 1 and a second display film layer 2; the first display film layer 1 and the second display film layer 2 are arranged in a stacked mode along the direction perpendicular to the plane where the display panel is located; the first display film layer 1 includes a light emitting layer 10, the second display film layer 2 includes an electrophoretic cell 20, the electrophoretic cell 20 includes an electrophoretic liquid and a plurality of electrophoretic particles dispersed in the electrophoretic liquid; the electrophoretic cell 20 does not overlap the light emitting layer 10 in a direction perpendicular to the plane of the display panel.
The working modes of the display panel comprise a first working mode and a second working mode; the driving method provided by the embodiment of the invention comprises the following steps: in the first operation mode, the light emitting layer 10 is controlled to be lit; and controlling the second display film layer 2 to be in a black state; in the second operation mode, the light emitting layer 10 is controlled not to be lit, and the second display film layer 2 is controlled to display a predetermined image.
According to the embodiment of the invention, the first display film layer 1 and the second display film layer 2 are arranged in the display panel, so that the first display film layer 1 and the second display film layer 2 can be respectively displayed to meet the display requirements of different types of pictures when the display panel works. So set up, when richening display panel's service function, also can be according to treating that the display screen selects suitable demonstration rete, when guaranteeing display panel's display effect, still can make display panel have lower consumption.
Moreover, the first working mode and the second working mode are arranged, so that the display of the first display film layer 1 and the display of the second display film layer 2 are not interfered with each other, and the first display film layer 1 and the second display film layer 2 can show a good display effect.
In addition, along a direction perpendicular to the plane of the display panel, the embodiment of the invention can prevent the light emitted from the light-emitting layer 10 from being affected by the electrophoretic unit 20 in the process of emitting the light out of the display panel by making the electrophoretic unit 20 and the light-emitting layer 10 not overlap, and can further ensure that the first display film layer 1 and the second display film layer 2 can both present a good display effect by preventing the light emitted from the light-emitting layer 10 from being affected by the electrophoretic unit 20 in the process of emitting the light emitted from the electrophoretic unit 20 and the light reflected by the electrophoretic unit 20 from being affected by the light-emitting layer 10 in the process of emitting the light out of the display panel.
Optionally, as shown in fig. 2, the first display film layer 1 further includes a first light emitting electrode 11 and a second light emitting electrode 12; the light-emitting layer 10 is located between the first light-emitting electrode 11 and the second light-emitting electrode 12 in a direction perpendicular to the plane of the display panel; the second light-emitting electrode 12 is positioned at a side of the light-emitting layer 10 adjacent to the electrophoretic cell. The second display film layer 2 further includes a first driving electrode 21 and a second driving electrode 22; the electrophoretic cell 20 is located between the first driving electrode 21 and the second driving electrode 22 in a direction perpendicular to the plane of the display panel; the first driving electrode 21 is positioned at a side of the electrophoretic cell 20 adjacent to the light emitting layer 10. In the embodiment of the present invention, the second light emitting electrode 12 can be reused as the first driving electrode 21, so as to reduce the number of film layers in the display panel and reduce the thickness of the display panel.
In an embodiment of the present invention, in the second operation mode, the method for controlling the light emitting layer 10 not to be lit includes: the reset voltage is supplied to the first light emitting electrode 11 to form a preset voltage difference between the first light emitting electrode 11 and the second light emitting electrode 12, which is smaller than the lighting voltage of the light emitting layer 10, to ensure that the light emitting layer 10 is not lighted. Illustratively, the reset voltage is lower than the voltage of the corresponding first driving electrode 21 in the second operation mode.
In the case where the first driving electrode 21 is multiplexed as the second light-emitting electrode 12, the potential of the first driving electrode 21 may also change when the potential of the second driving electrode 22 jumps in the second operation mode, and in this case, the embodiment of the present invention may set the reset voltage according to the potential after the jump of the first driving electrode 21, so as to ensure that the light-emitting layer 10 does not light in the second operation mode.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (17)

1. A display panel is characterized by comprising a first display film layer and a second display film layer; the first display film layer and the second display film layer are arranged in a stacked mode along the direction perpendicular to the plane where the display panel is located;
the first display film layer comprises a light emitting layer, the second display film layer comprises an electrophoretic cell, and the electrophoretic cell comprises a plurality of electrophoretic particles; the electrophoretic unit and the light-emitting layer are not overlapped along a direction perpendicular to the plane of the display panel.
2. The display panel according to claim 1,
the second display film layer is located on one side, close to the light emitting side of the display panel, of the first display film layer.
3. The display panel according to claim 1,
the first display film layer further comprises a first light-emitting electrode and a second light-emitting electrode; the light-emitting layer is positioned between the first light-emitting electrode and the second light-emitting electrode along the direction vertical to the plane of the display panel;
the second display film layer further comprises a first driving electrode and a second driving electrode; the electrophoresis unit is positioned between the first driving electrode and the second driving electrode along the direction vertical to the plane of the display panel.
4. The display panel according to claim 3, wherein the second light-emitting electrode is located on a side of the light-emitting layer adjacent to the electrophoretic cell; the first driving electrode is positioned on one side of the electrophoresis unit close to the light-emitting layer;
the second light emitting electrode is multiplexed as the first driving electrode.
5. The display panel according to claim 3,
the second driving electrode is positioned on one side of the electrophoresis unit far away from the first driving electrode;
the area of the orthographic projection of the second driving electrode on the plane where the display panel is located is larger than or equal to the area of the orthographic projection of the electrophoresis unit on the plane where the display panel is located.
6. The display panel according to claim 3, further comprising a first drive lead and a second drive lead;
the first driving electrode is electrically connected with the electrophoresis driving chip through the first driving lead;
the second driving electrode is electrically connected with the electrophoresis driving chip through the second driving lead.
7. The display panel according to claim 6,
the first driving lead and/or the second driving lead are/is positioned on the second display film layer;
and the first driving lead and the second driving lead are not overlapped with the light-emitting layer along the direction vertical to the plane of the display panel.
8. The display panel according to claim 6,
the second display film layer comprises a plurality of first driving electrode groups and a plurality of second driving electrode groups, the first driving electrode groups comprise a plurality of first driving electrodes which are connected with each other and arranged along a first direction, and the second driving electrode groups comprise a plurality of second driving electrodes which are connected with each other and arranged along a second direction; the first direction and the second direction are mutually crossed;
the first driving lead is electrically connected with the first driving electrode at the end part in the first driving electrode group; the second driving lead is electrically connected with the second driving electrode at the end of the second driving electrode group.
9. The display panel according to claim 1,
the first display film layer further comprises a pixel defining layer, the pixel defining layer comprises an opening, and the light emitting layer is positioned in the opening;
the electrophoretic cell does not overlap the opening in a direction perpendicular to a plane in which the display panel is located.
10. The display panel according to claim 1, further comprising a protective layer; and the protective layer is positioned between the first display film layer and the second display film layer along the direction vertical to the plane of the display panel.
11. The display panel of claim 1, further comprising a color-resist layer on a side of the second display film layer away from the first display film layer;
the color resistance layer comprises a plurality of color resistance units; along the direction perpendicular to the plane of the display panel, the color resistance unit is overlapped with the light-emitting layer, and the color resistance unit is not overlapped with the electrophoresis unit.
12. A display module comprising an optical film layer and the display panel according to any one of claims 1 to 11, wherein the optical film layer is located on the light-emitting side of the display panel;
the optical film layer comprises a first area and a second area, and the light transmittance of the first area is smaller than that of the second area; the first region overlaps with the light emitting layer, and the second region overlaps with the electrophoretic cell, in a direction perpendicular to a plane of the display panel.
13. The display module according to claim 12, wherein the optical film layer comprises a linear polarizer and a wave plate, the linear polarizer is located in the first region, and the linear polarizer is located on a side of the wave plate away from the display panel.
14. The display module of claim 13,
the linear polarizer comprises a through hole, the through hole penetrates through the linear polarizer, and the through hole is located in the second area.
15. A display device comprising the display module according to any one of claims 12 to 14.
16. The driving method of the display panel is characterized in that the display panel comprises a first display film layer and a second display film layer; the first display film layer and the second display film layer are arranged in a stacked mode along the direction perpendicular to the plane of the display panel;
the first display film layer comprises a light emitting layer, the second display film layer comprises an electrophoretic unit, and the electrophoretic unit comprises a plurality of electrophoretic particles; the electrophoretic unit is not overlapped with the light-emitting layer along the direction vertical to the plane of the display panel;
the working modes of the display panel comprise a first working mode and a second working mode;
the driving method includes:
in the first working mode, controlling the light-emitting layer to light up; controlling the second display film layer to be in a black state;
and under the second working mode, controlling the light-emitting layer not to be lightened, and controlling the second display film layer to display a preset picture.
17. The driving method according to claim 16,
the first display film layer further comprises a first light-emitting electrode and a second light-emitting electrode; the light-emitting layer is positioned between the first light-emitting electrode and the second light-emitting electrode along the direction vertical to the plane of the display panel; the second light-emitting electrode is positioned on one side of the light-emitting layer close to the electrophoresis unit;
the second display film layer further comprises a first driving electrode and a second driving electrode; the electrophoresis unit is positioned between the first driving electrode and the second driving electrode along the direction vertical to the plane of the display panel; the first driving electrode is positioned on one side of the electrophoresis unit close to the light-emitting layer;
the second light-emitting electrode is multiplexed as the first driving electrode;
in the second operation mode, the method for controlling the light-emitting layer not to be lighted comprises the following steps:
providing a reset voltage to the first light emitting electrode to form a preset voltage difference between the first light emitting electrode and the second light emitting electrode, wherein the preset voltage difference is smaller than a lighting voltage of the light emitting layer.
CN202210208345.0A 2022-03-04 2022-03-04 Display panel, driving method thereof, display module and display device Active CN114582234B (en)

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