CN116390518A

CN116390518A - Display panel and display device

Info

Publication number: CN116390518A
Application number: CN202211627304.1A
Authority: CN
Inventors: 朱映光; 郭立雪; 康建喜; 张国辉; 张玉婷; 李栋栋; 胡永岚
Original assignee: Guan Yeolight Technology Co Ltd; Huaibei Yeolight Technology Co Ltd
Current assignee: Guan Yeolight Technology Co Ltd; Huaibei Yeolight Technology Co Ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-07-04

Abstract

The invention discloses a display panel and a display device, the display panel includes: a drive back plate; a shared electrode layer positioned on the surface of one side of the driving backboard; an active light emitting layer and a first electrode layer; the active luminous layer is positioned at one side of the shared electrode layer, which is far away from the driving backboard, and the first electrode layer is positioned at one side of the active luminous layer, which is far away from the driving backboard; the shared electrode layer and the first electrode layer are used for supplying power to the active light-emitting layer; the packaging layer is positioned at one side of the first electrode layer far away from the driving backboard and is used for packaging the active luminous layer and the first electrode layer; a passive display layer and a second electrode layer; the passive display layer is positioned on one side of the encapsulation layer far away from the driving backboard, and the second electrode layer is positioned on one side of the passive display layer far away from the driving backboard; the shared electrode layer and the second electrode layer are used for providing a first electric field for the passive display layer, so that the power consumption of the display panel is reduced.

Description

Display panel and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.

Background

The electronic paper is also called digital paper, can still keep the original picture after losing electricity, has the functions of low power consumption and folding and bending, and is widely applied to the fields of electronic paper books, electronic price tags and the like.

However, currently, a display screen commonly used generally employs a self-luminous organic electroluminescent device, and it is often required to display a picture of a special shape, for example, a lock screen picture, for a long time; in this case, the self-luminous display device has a problem of excessive power consumption.

Disclosure of Invention

The embodiment of the invention provides a display panel and a display device, which are used for reducing the power consumption of the display device.

According to an aspect of the present invention, there is provided a display panel including:

a drive back plate;

the shared electrode layer is positioned on the surface of one side of the driving backboard and comprises a plurality of shared electrodes which are arranged at intervals;

an active light emitting layer and a first electrode layer; the active light-emitting layer is positioned on one side of the shared electrode layer away from the driving backboard, and the first electrode layer is positioned on one side of the active light-emitting layer away from the driving backboard; the shared electrode layer and the first electrode layer are used for supplying power to the active light-emitting layer;

the packaging layer is positioned on one side of the first electrode layer away from the driving backboard and is used for packaging the active light-emitting layer and the first electrode layer;

a passive display layer and a second electrode layer; the passive display layer is positioned on one side of the packaging layer far away from the driving backboard, and the second electrode layer is positioned on one side of the passive display layer far away from the driving backboard; the shared electrode layer and the second electrode layer are used for providing a first electric field for the passive display layer.

Optionally, each shared electrode, and the active light-emitting layer and the first electrode layer located at one side of the shared electrode form an active light-emitting unit; each sharing electrode and the passive display layer and the second electrode layer which are positioned at one side of the sharing electrode form a passive display unit;

the passive display layers can be multiplexed into the filter layer of the active light emitting layer, and each passive display unit is used as a filter unit of the active light emitting units sharing the same shared electrode.

Optionally, the display panel further includes a touch layer; the second electrode layer is multiplexed into one touch electrode layer in the touch layers;

the active light-emitting layer comprises organic light-emitting materials and/or quantum dots; the passive display layer includes an electrophoretic display layer or an electrowetting display layer.

Optionally, when the passive display layer is an electrowetting display layer, the passive display layer includes a hydrophobic layer and a first electrowetting ink layer; the hydrophobic layer is positioned on one side of the first electrowetting ink layer close to the driving backboard;

the first electrowetting ink layer comprises water, a plurality of colored oil films immersed in the water and a spacer for spacing the colored oil films of two adjacent different colors; when the passive display layer is multiplexed as the filter layer of the active light-emitting layer, the second electrode layer is not powered;

The encapsulation layer is multiplexed into the hydrophobic layer.

When the passive display layer is an electrophoretic display layer, the passive display layer includes:

a plurality of cavities, each of which is filled with an electrophoretic fluid having charged ink particles of one color; wherein the color of the charged ink particles is a filter color;

a plurality of vertical electrode pairs, each vertical electrode pair comprising a first vertical electrode and a second vertical electrode; each cavity is positioned between a first vertical electrode and a second vertical electrode of one vertical electrode pair; the first vertical electrode and the second vertical electrode are used for providing a second electric field for the charged ink particles;

when the passive display layer is multiplexed as the filter layer of the active light-emitting layer, the charged ink particles are positioned at the top of the cavity under the action of the first electric field;

when the passive display layer is used for displaying, in a displayed cavity, the charged ink particles are positioned at the top of the cavity under the action of the first electric field; in a cavity, not shown, the charged ink particles are located at the side of the cavity under the action of the second electric field.

Optionally, when the passive display layer is an electrophoretic display layer, the passive display layer includes:

a plurality of cavities, each of which is filled with an electrophoretic fluid having charged ink particles of at least two colors; wherein, the color of some of the said charged ink particles is the color of the filtering, the color of some of the said charged ink particles is the color of the non-filtering;

a plurality of vertical electrode pairs, each vertical electrode pair comprising a first vertical electrode and a second vertical electrode; each cavity is correspondingly positioned between a first vertical electrode and a second vertical electrode of one vertical electrode pair; when the passive display layer is multiplexed as the filter layer of the active luminescent layer, the first vertical electrode and the second vertical electrode are used for providing a second electric field for charged ink particles; under the combined action of the first electric field and the second electric field, the filter ribbon electric ink particles cover at least part of the top area of the cavity, and the vertical projection of the filter ribbon electric ink particles positioned at the top of the cavity on the bottom of the cavity is not overlapped with at least part of the area where the non-filter ribbon electric ink particles positioned at the bottom of the cavity are positioned.

Optionally, one side of the driving backboard further includes a pixel defining layer, the pixel defining layer includes a plurality of openings, the openings are arranged in one-to-one correspondence with the sharing electrodes, and expose part of the sharing electrodes, and the active light emitting layer is located in the openings;

the vertical projection area of the opening on the shared electrode is smaller than the vertical projection area of the cavity body on the shared electrode.

a plurality of cavities, each of which is filled with an electrophoretic fluid having charged ink particles and uncharged ink particles; wherein the color of the uncharged ink particles is a filter color;

a plurality of vertical electrode pairs, each vertical electrode pair comprising a first vertical electrode and a second vertical electrode; each cavity is positioned between a first vertical electrode and a second vertical electrode of one vertical electrode pair; when the passive display layer is multiplexed as the filter layer of the active light-emitting layer, the first vertical electrode and the second vertical electrode are used for providing a second electric field for charged ink particles so as to drive the charged ink particles to the side face of the cavity body, and the non-charged ink particles with the light color are filtered. .

Optionally, a vertical electrode is shared between two adjacent cavity bodies; the first vertical electrodes and the second vertical electrodes are alternately arranged in sequence; the cavity comprises microcapsules or microcups.

According to another aspect of the present invention, there is provided a display device including the display panel according to any one of the embodiments of the present invention.

According to the technical scheme provided by the embodiment of the invention, the shared electrode, the active luminous layer and the first electrode layer are sequentially arranged on one surface of the driving backboard, so that an active display panel with good display effect and high refresh rate can be formed; the passive display layer and the second electrode layer are sequentially arranged on one side of the packaging layer, which is far away from the driving backboard, and the shared electrode layer is multiplexed into one electrode layer of the two electrode layers in the electric field provided for the passive display layer, so that a passive display panel with lower power consumption is formed; two display modes are realized. When a special-shaped picture, for example, a lock screen picture, is required to be displayed for a long time, a passive display layer with low power consumption can be adopted for display, so that the power consumption of the display device can be reduced.

Drawings

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of another display panel according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another display panel according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of another display panel according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of another display panel according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of another display panel according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 16 is a schematic view of another display panel according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of another display panel according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

An embodiment of the present invention provides a display panel, fig. 1 is a schematic structural diagram of the display panel provided by the embodiment of the present invention, fig. 2 is a schematic structural diagram of another display panel provided by the embodiment of the present invention, and referring to fig. 1 to fig. 2, the display panel includes:

a drive back plate 10;

a sharing electrode layer on one side surface of the driving back plate 10, wherein the sharing electrode layer comprises a plurality of sharing electrodes 20 arranged at intervals;

an active light emitting layer 30 and a first electrode layer 40; the active light emitting layer 30 is located at a side of the shared electrode layer away from the driving back plate 10, and the first electrode layer 40 is located at a side of the active light emitting layer 30 away from the driving back plate 10; the shared electrode layer and the first electrode layer 40 are used to power the active light emitting layer 30;

The packaging layer 50 is positioned on one side of the first electrode layer 40 away from the driving backboard 10, and the packaging layer 50 is used for packaging the active light-emitting layer 30 and the first electrode layer 40;

a passive display layer 60 and a second electrode layer 70; the passive display layer 60 is located at a side of the encapsulation layer 50 away from the driving back plate 10, and the second electrode layer 70 is located at a side of the passive display layer 60 away from the driving back plate 10; the shared electrode layer and the second electrode layer 70 are used for providing a first electric field to the passive display layer 60; the passive display layer 60 can be multiplexed as a filter layer for the active light emitting layer 30.

Specifically, the driving back plate 10 is a film layer structure that can provide driving signals for the display panel and perform buffering, protection, or supporting functions. A patterned shared electrode layer is disposed on one surface of the driving back plate 10, and the patterned shared electrode layer includes a plurality of spaced shared electrodes 20. The material of the sharing electrode 20 may include Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), zinc oxide (ZnO), indium oxide (In 2O 3), or the like.

The active light emitting layer 30 is located at a side of the shared electrode layer away from the driving back plate 10, and the active light emitting layer 30 may be formed of, for example, a low molecular weight organic material or a high molecular weight organic material; the active light emitting layer 30 may include various other functional layers in addition to the organic emission layer. In one embodiment, a Pixel Defining Layer (PDL) comprising a plurality of openings exposing the shared electrode 20 may be further included on one side of the driving backplate 10, and the active light emitting layer 30 is located in the openings, thereby defining an emission region of each sub-pixel. PDL may be formed of an organic material such as Polyimide (PI), polyamide, benzocyclobutene (BCB), acryl resin, or phenol resin.

The first electrode layer 40 is positioned on the active light emitting layer 30, and a material of the first electrode layer 40 may include Ag, magnesium (Mg), al, pt, pd, au, ni, nd, iridium (Ir), cr, or a mixture thereof. If a voltage is applied to the first electrode layer 40 and the shared electrode layer, the active light emitting layer 30 positioned between the first electrode layer 40 and the shared electrode layer may emit visible light under the excitation of an electrical signal, thereby realizing an image that can be recognized by a user. The encapsulation layer 50 is located on the organic light emitting structure. The encapsulation layer 50 protects the active light emitting layer 30 and other thin layers from external moisture, oxygen, and the like. The encapsulation layer 50 may include an inorganic layer and an organic layer, which are alternately stacked. The driving back plate 10, the sharing electrode 20, the active light emitting layer 30 and the first electrode layer 40 on the driving back plate 10 can form an active display panel with better display effect and higher refresh rate. The light emitting direction of the active display panel is the direction in which the active light emitting layer 30 points to the first electrode layer 40.

The passive display layer 60 is located on a side of the encapsulation layer 50 away from the driving back plate 10, and the passive display layer 60 cannot emit light autonomously and needs to display by reflecting ambient light. Referring to fig. 1, the passive display layer 60 may have tens of thousands of tiny charged ink particles 64, for example, the charged ink particles 64 may be distributed in a transparent or colored base liquid to form a suspension, each ink particle 501 having a diameter of about 100 μm, and the surface may be susceptible to adsorption of charge to form an electron particle. The second electrode layer 70 is located at a side of the passive display layer 60 away from the driving back plate 10, and the shared electrode layer and the second electrode layer 70 are used for providing a first electric field for the passive display layer 60, and the particles capable of inducing charges can move under the action of the applied electric field, so that the conversion of the text and the image is realized. Referring to fig. 2 and 3, there may also be tens of thousands of tiny oil films 621 within the passive display layer 60, with these oil films 621 being distributed in the water. The shared electrode layer and the second electrode layer 70 are used for providing a first electric field for the passive display layer 60, and the first electric field can control the flattening and aggregation state of the oil film 621, so as to realize the transformation of the text image. The driving back plate 10 and the sharing electrode layer, the passive display layer 60 and the second electrode layer 70 on the driving back plate 10 may form a passive display panel with low power consumption. The material of the second electrode layer 70 has transparency so that ambient light can be incident on the passive display layer 60 and reflected out, thereby realizing display.

That is, a passive display panel is disposed on the light emitting surface of the conventional active display panel, and the passive display panel shares the driving back plate 10 and an electrode layer in the active display panel, so as to realize the control of conventional display or passive display (e.g. electrophoretic display) through time sequence or time division. When a special-shaped picture, for example, a lock screen picture, is required to be displayed for a long time, a passive display layer with low power consumption can be adopted for display, so that the power consumption of the display device can be reduced. In addition, the passive display panel has an antistatic effect, so that the ESD resistance of the active display panel can be enhanced. It can be understood that the second electrode layer 70 in the passive display panel and the first electrode layer 40 can form a capacitance structure, which is equivalent to connecting a capacitance in parallel to the screen of the active display panel, so that the overall capacitance is increased, the anti-ESD capability of the active display panel is enhanced, and the anti-static capability of the display panel is further enhanced.

According to the display panel provided by the embodiment of the invention, the shared electrode, the active luminous layer and the first electrode layer are sequentially arranged on one surface of the driving backboard, so that the active display panel with good display effect and high refresh rate can be formed; the passive display layer and the second electrode layer are sequentially arranged on one side of the packaging layer, which is far away from the driving backboard, and the shared electrode layer is multiplexed into one electrode layer of the two electrode layers in the electric field provided for the passive display layer, so that a passive display panel with lower power consumption is formed; the two display modes are realized, and meanwhile, the whole thickness of the display panel is reduced due to the fact that the driving back plate and one electrode layer are shared. When a special-shaped picture, for example, a lock screen picture, is required to be displayed for a long time, a passive display layer with low power consumption can be adopted for display, so that the power consumption of the display device can be reduced.

As an embodiment of the present invention, please continue to refer to fig. 1-2, alternatively, the active Light Emitting layer 30 includes an Organic Light Emitting material sub-layer, the driving back plate 10 and the active Light Emitting layer 30, the first electrode layer 40 and the encapsulation layer 50 on the driving back plate 10 are used to form an OLED (Organic Light-Emitting Diode) display panel.

Specifically, the OLED display panel has self-luminous characteristics. The OLED display panel is used as a new generation display technology, has better display performance than an LCD, and has the advantages of good display effect, low power consumption, high flexibility, ultra-light weight and the like. The OLED materials are the core components of the OLED display panel, which determine the performance of the OLED display panel. An organic light emitting material sub-layer (OLED material) is disposed between the two electrode layers to form a sandwich-like structure, which is placed on the driving back plate 10. When the two electrode layers are powered on, electrons injected from the cathode and holes injected from the anode are combined in the organic luminescent material sub-layer, and energy is released to be displayed in the form of light. The luminescent layer material composition of the organic luminescent material sub-layer is different, the color of the emitted light is different, so that the three primary colors of red, blue and green can be obtained by selecting different luminescent materials, and full-color display is realized. The active luminescent layer 30 comprises an organic luminescent material sub-layer, and may further comprise at least one of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Transport Layer (ETL) and an Electron Injection Layer (EIL), mainly various organic materials

As an embodiment of the present invention, please continue to refer to fig. 1-2, alternatively, the active light emitting layer 30 includes a quantum dot photon layer, and the driving back plate 10 and the active light emitting layer 30, the first electrode layer 40 and the encapsulation layer 50 on the driving back plate 10 are used to form a QLED display panel.

Specifically, the material of the quantum dot photon layer comprises quantum dots. Quantum dots are semiconductors such as indium phosphide, gallium nitride, cadmium selenide, lead sulfide, and the like. Quantum dots, which are inorganic semiconductor materials, have a narrow luminescence spectrum, high color purity and good optical stability, and are receiving increasing attention in the display field. The luminescence of a quantum dot is the result of the recombination of an electron and a hole, or called exciton annihilation. To make the quantum dot emit light, the quantum dot first generates an exciton. There are generally two ways of generating excitons, one is photoinduced and one is electrically induced; in the embodiment of the invention, an electro-induced mode is adopted. Without excitation (ground state), all electrons are distributed above the valence band. After the two electrode layers are powered on, an electron can be injected into the conduction band of the quantum dot from the outside through an electric field, then a hole is injected into the valence band, and the electron and the hole can be recombined to release a photon. Different quantum dots can also obtain three primary colors of red, blue and green. The active light emitting layer 30 includes a quantum dot photon layer and may further include at least one of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Transport Layer (ETL), and an Electron Injection Layer (EIL).

As an embodiment of the present invention, the active light emitting layer 30 may optionally include an organic light emitting material or be doped with quantum dots.

Fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 4, optionally, the display panel may further include a filter layer 90, where the filter layer 90 is located between the passive display layer 60 and the encapsulation layer 50, and the filter layer 90 is used for filtering the light emitted by the active light emitting layer 30, so as to improve the display effect of the active display panel. The filter layer 90 includes a plurality of filter units of different colors and a black matrix disposed around the filter units. The exemplary drawing in fig. 4 shows that the filter unit includes a red filter unit RCF, a green filter unit GCF, and a blue filter unit BCF. The red filter unit RCF is used for filtering out light of other colors and transmitting red light; the green filter unit GCF is used for filtering light of other colors and transmitting green light; the blue filter unit BCF is used for filtering out light of other colors and transmitting blue light.

Alternatively, referring to fig. 1 and 2, the shared electrode layer, the driving back plate 10, and the passive display layer 60 and the second electrode layer 70 are used to construct an electronic paper display panel. A display screen (display) using the electronic paper technology is called an electronic paper or an electronic paper screen. It features reflecting light, ultra-thin light, ultra-low power consumption and flexible. The electronic paper display panel in the embodiment of the invention is formed based on the electronic paper technology. Electronic paper technology includes electrophoretic display technology, electrowetting display technology, and the like.

Optionally, the passive display layer can be multiplexed into the filter layer of the active display panel by controlling the electric field applied to the passive display layer and adapting the color displayed on the passive display layer, so that the traditional CF filter layer is omitted, and the overall thickness of the display panel can be further reduced while the display effect of the active display panel is ensured. And moreover, the phenomenon that the distance between two electrodes of the passive display layer is too large due to the existence of the traditional CF filter layer, so that an electric field is weakened, and the movement of display particles or oil films in the passive display layer is influenced is avoided. In addition, in the existing display device, the CF filter layer is used to perform color adjustment on the display device, but the existence of the CF filter layer also reduces the brightness of the display device, so that the display brightness is satisfied, and the power consumption of the display device is high. Multiplexing the passive display layer as the filter layer of the active display panel can further reduce the power consumption of the display device.

In an embodiment of the present invention, please continue to refer to fig. 1-2, optionally, each of the common electrodes 20 and the active light emitting layer 30 and the first electrode layer 40 located at one side of the common electrode 20 form an active light emitting unit; each of the common electrodes 20 and the passive display layer 60 and the second electrode layer 70 positioned at one side of the common electrode 20 form a passive display unit;

When the passive display layer 60 is multiplexed as the filter layer of the active light emitting layer 30, each passive display unit is used as a filter unit of the active light emitting units sharing the same common electrode 20.

Specifically, the active display panel includes active light emitting units with multiple light emitting colors, and the active light emitting units can be understood as a sub-pixel in the active display panel. The subpixels in the active display panel may include red subpixels for emitting red light, green subpixels for emitting green light, and blue subpixels for emitting blue light, and may also include subpixels of other emission colors. The red subpixel has a red-emitting light-emitting layer R, the green subpixel has a green-emitting light-emitting layer G, and the blue subpixel has a blue-emitting light-emitting layer B. Each of the common electrodes 20 and the passive display layer 60 and the second electrode layer 70 located at one side of the common electrode 20 constitute a passive display unit, and the passive display unit constitutes a sub-pixel of the passive display panel.

The subpixels in the passive display panel may include a red subpixel for reflecting red light, a green subpixel for reflecting green light, and a blue subpixel for reflecting blue light; sub-pixels reflecting light of other colors may also be included. Setting sub-pixels for reflecting red light in the passive display panel, wherein the sub-pixels are in one-to-one correspondence with the sub-pixels for emitting red light in the active display panel; setting sub-pixels for reflecting green light in the passive display panel, wherein the sub-pixels are in one-to-one correspondence with the sub-pixels for emitting green light in the active display panel; the sub-pixels used for reflecting blue light in the passive display panel are arranged in one-to-one correspondence with the sub-pixels used for emitting blue light in the active display panel. Each passive display unit can be used as a light filtering unit of the active light emitting units sharing the same shared electrode 20, so that the light filtering of each active light emitting unit can be realized, and the display effect of the display panel is improved.

With continued reference to fig. 1-2, optionally, the display panel further includes a touch layer 80; the second electrode layer 70 is multiplexed as a touch electrode layer in the touch layer 80. The thickness and cost of the display panel can be further reduced.

Referring to fig. 2 and 3, as an alternative embodiment of the present invention, when the passive display layer 60 is an electrowetting display layer, the passive display layer 60 includes a hydrophobic layer 61 and an electrowetting ink layer 62; the hydrophobic layer 61 is located on the side of the electrowetting ink layer 62 close to the drive backplate 10;

wherein the electrowetting ink layer 62 includes water 622, a plurality of colored oil films 621 immersed in the water 622, and a spacer 623 for spacing adjacent colored oil films 621 of two different colors; when the passive display layer 60 is multiplexed as the filter layer of the active light emitting layer 30, the second electrode layer 70 is not powered.

In particular, the electrowetting display technique is a technique developed by taking advantage of the natural forces inherent in the oil-water 622 interface and related theories. The technique employs a highly hydrophobic material that can remove water 622 from the surface and uses oil film 621 as a medium to form separate oil and water phases, the wetting effect of which can be altered by voltage to render the surface more hydrophilic (wetting). Since the original water-resistant surface now becomes more water-absorbent, the oil film 621 has to change its form. This interface property control is the basis for electrowetting applications.

In forming the display, the electrowetting principle can be used to create a pixel modulator. When the different pixels are independently activated to create an image, the oil film 621 is colored one color, thereby forming a display. In principle any desired color can be given to the pixel, thereby achieving various display effects. Associating the oil film 621 with the pixel, the form of the oil film 621 changes, resulting in a change in the color of the pixel, thereby effecting a change in color. For example, referring to fig. 2, when there is no electric field between the sharing electrode 20 and the second electrode layer 70, the oil film 621 is in a flattened state, at which time, the color of the oil film 621 may be displayed; referring to fig. 3, when an electric field exists between the shared electrode 20 and the second electrode layer 70, the oil film 621 is in an aggregated state. The oil film 621 is controlled to be gathered or flattened by an electric field, thereby realizing display of a specific image.

When the display is performed by the active light emitting layer 30, the second electrode layer 70 is not supplied with power, and the second electrode layer 70 and the shared electrode layer cannot supply power to the passive display layer 60, so that the whole oil film 621 can be controlled to be in a flattened state; so that the oil film 621 functions as a filter to perform normal display. When low power consumption display is required, the first electrode layer 40 above the active light emitting layer 30 may not be supplied with power, the light emitting sub-pixels may be turned off, and the display of the electrowetting electronic paper display panel may be realized by controlling the electric field between each of the shared electrodes 20 and the second electrode layer 70, and controlling the flattening or aggregation of the oil film 621.

Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 5, an optional encapsulation layer 50 is multiplexed into a hydrophobic layer 61. It can be understood that the encapsulation layer 50 and the hydrophobic layer 61 are provided as the same layer, so that the overall thickness of the display panel can be further reduced; further, the electric field is weakened by excessively large distance between the electrodes of the passive display layer 60, and the switching of the oil film 621 from the flattened state to the gathered state in the passive display layer 60 can be prevented.

Fig. 6 is a schematic structural diagram of another display panel provided by the embodiment of the present invention, fig. 7 is a schematic structural diagram of another display panel provided by the embodiment of the present invention, and referring to fig. 6 and fig. 7, as an alternative embodiment of the present invention, when the passive display layer 60 is an electrophoretic display layer, the passive display layer 60 includes:

a plurality of cavities 63, each cavity 63 being filled with an electrophoretic fluid having charged ink particles 64 of one color; wherein the color of the charged ink particles 64 is a filter color;

a plurality of vertical electrode pairs, each vertical electrode pair including a first vertical electrode L1 and a second vertical electrode L2; each cavity 63 is located between a first vertical electrode L1 and a second vertical electrode L2 of a vertical electrode pair; the first and second vertical electrodes L1 and L2 are used to provide a second electric field to the charged ink particles 64.

Referring to fig. 6, when the passive display layer 60 is multiplexed into an active light emitting, filter layer 30, the charged ink particles 64 are located on top of the cavity 63 under the action of the first electric field. Referring to fig. 7, when the passive display layer 60 is used for display, charged ink particles 64 are positioned on top of the cavity 63 under the action of the first electric field in the cavity 63 to display the corresponding color; in the cavity 63, which is not shown, the charged ink particles 64 are located on the side of the cavity 63 by the second electric field, and the active light emitting layer 30 below is not lit, i.e., the pixels at that location are not shown. Three cavities 63 are schematically depicted in fig. 7, wherein the left and right cavities 63, 63 are shown cavities 63, and the middle cavity 63 is a non-shown cavity 63.

Fig. 8 is a schematic structural diagram of another display panel provided by the embodiment of the present invention, and fig. 9 is a schematic structural diagram of another display panel provided by the embodiment of the present invention, referring to fig. 8 and fig. 9, as an alternative embodiment of the present invention, when the passive display layer 60 is an electrophoretic display layer, the passive display layer 60 includes:

a plurality of cavities 63, each cavity 63 being filled with an electrophoretic fluid having charged ink particles of at least two colors; wherein the color of the partially charged ink particles is a filter color, and the color of the partially charged ink particles is a non-filter color;

A plurality of vertical electrode pairs, each vertical electrode pair including a first vertical electrode L1 and a second vertical electrode L2; each cavity 63 is correspondingly located between a first vertical electrode L1 and a second vertical electrode L2 of a vertical electrode pair; when the passive display layer 60 is multiplexed as the filter layer of the active light emitting layer 30, the first vertical electrode L1 and the second vertical electrode L2 are used to provide the charged ink particles with the second electric field to drive the non-filtering colored ink particles 642 to the side of the cavity 63.

Specifically, referring to fig. 6, cavity 63 may be a microcapsule 631 and passive display layer 60 may perform microcapsule electrophoretic display. The microcapsule electrophoretic display material is a liquid material before being coated, and is visually referred to as electronic ink "water". In this liquid material are suspended hundreds to thousands of microcapsules 631 of a size comparable to the diameter of human hair, each microcapsule 631 being composed of positively charged particles and negatively charged particles. The electronic paper microcapsules 631 can be directly printed on the surface of the encapsulation layer 50 on the side far away from the driving back plate 10, so that the structure is further simplified, and the situation that the electric field is weakened due to the overlarge distance between the two electrodes of the passive display layer 60 is further avoided, so that the movement of display particles in the passive display layer 60 is affected. If the shared electrode 20 is an electric field positive electrode, the second electrode layer 70 is an electric field negative electrode; the particles with positive charges move to the negative electrode of the electric field under the action of the electric field, the colors of the particles with positive charges are displayed, and the particles with negative charges move to the bottom of the microcapsule body to be hidden; if the shared electrode 20 is the negative electrode of the electric field, the second electrode layer 70 is the positive electrode of the electric field, and the particles with negative charges move to the positive electrode of the electric field under the action of the electric field, the color of the particles with negative charges is displayed, and the particles with positive charges move to the bottom of the microcapsule body to be "hidden". When the microcapsules 631 carry colored charged ink particles, color can be displayed.

Referring to fig. 9, the cavity 63 may be micro-cups 632, and each micro-cup 632 includes at least two colors of charged ink particles therein, and the passive display layer 60 performs an electrophoretic display of the micro-cup 632. The principle of display is basically the same as that of microcapsules, except that the solution containing charged particles is encapsulated in a tailored microcup instead of a capsule. Microcups 632 include recesses 601 and walls 602. Microcups 632 may be formed from a layer of material that has been etched. Image display is achieved by applying and switching an electric field to the dispersion to cause the charged particles to electrophoretically generate in the microcups. The charged particles and the dielectric liquid are encapsulated in the micro-cup 632, and the micro-cup 632 divides the electrophoretic fluid into tiny independent units, so that the leakage of the electrophoretic fluid and the displacement of the particles are effectively prevented. The micro-cup 632 structure has the advantages of arbitrary modeling, structural integrity and mechanical stability, excellent display performance under the conditions of bending, curling and compression, no sealant is needed on the side surface, the micro-cup 632 structure can be cut into any required size and shape, and the electrophoretic fluids in adjacent areas can not be mixed or cross-interfered during electrophoretic display. In addition, the micro cup 632 has a relatively uniform movement space for charged particles, and the height of the micro cup 632 is relatively uniform, so that control display of three (or more) particles is relatively easy to realize.

Referring to fig. 8 and 9, since the passive display layer 60 can be multiplexed as a filter layer of the active light emitting layer 30, each cavity 63 is filled with an electrophoretic liquid having charged ink particles of two colors; wherein the color of the partially charged ink particles (641) is a filter color, and the color of the partially charged ink particles (642) is a non-filter color. For example, the subpixels in the active display panel may include a red subpixel for emitting red light, a green subpixel for emitting green light, and a blue subpixel for emitting blue light. A plurality of uniformly and regularly arranged color sub-pixels are formed in cavity 63 in passive display layer 60. The cavities 63 corresponding to the three color sub-pixels sequentially contain red, green and blue charged ink particles and electrophoretic fluid. In the cavity 63 above the red subpixel which emits red light, there are included red charged ink particles and non-filter (e.g., black or white) charged ink particles 642; in cavity 63 above the green subpixel which emits green light, there are green charged ink particles and unfiltered charged ink particles 642; in the cavity 63 above the blue-emitting green subpixel, blue charged ink particles and unfiltered charged ink particles 642 are included. The different colors of filtering are achieved by driving the red, green and blue colored pigment particles in cavity 63.

To avoid the influence of the non-filtering charged ink particles 642 on the filtering during the filtering process, vertical electrodes, i.e., a first vertical electrode L1 and a second vertical electrode L2, are respectively disposed on opposite sides of each cavity 63. The first and second vertical electrodes L1 and L2 are used to provide a second electric field to the charged ink particles to drive the unfiltered colored ink particles 642 to a position of the cavity 63 near the sides. Wherein the first and second vertical electrodes L1 and L2 may be electrically insulated from the first electrode layer by the encapsulation layer 50; the first and second vertical electrodes L1 and L2 may be not in contact with the second electrode layer to achieve electrical insulation, or a dielectric layer may be provided between the vertical electrodes and the second electrode layer.

It will be appreciated that the charged ink particles in each cavity 63, under the combined action of the second electric fields provided by the first and second vertical electrodes L1 and L2 on both sides, and the first electric fields provided by the shared electrode 20 and the second electrode layer 70, the color-filtering ink ribbon particles 641 may be driven to the upper left of the cavity 63 and the color-non-filtering ink ribbon particles 642 may be driven to the lower right of the cavity 63 (as in fig. 8 and 9); alternatively, the color-filter ink particles 641 are driven to the upper portion of the cavity 63, and the color-non-filter ink particles 642 are driven to the lower left portion (not shown) of the cavity 63.

That is, at least a portion of the color of the unfiltered colored ink particles 642 are located laterally of the cavity 63 and have regions in the bottom region of the cavity 63 that emit light through the light-emitting sub-pixels. At least a portion of the color filter ink particles 641 are positioned on top of the cavity 63; and the top of the cavity 63 has a region for filtering the charged ink particles 641, which is at least partially overlapped with the region of the bottom of the cavity 63, which can emit light through the light emitting sub-pixel, in the vertical direction, thereby realizing the filtering effect on the light emitting sub-pixel.

When the display is performed only by the passive display layer 60, the first electrode layer 40 may not be supplied with power at this time, so that the active light emitting layer 30 cannot emit light. When the display is performed only by the active light emitting layer 30, the electric field intensity of the second electric field provided by the first vertical electrode L1 and the second vertical electrode L2 can be controlled to be much larger than the electric field intensity of the first electric field provided by the second electrode layer 70 and the shared electrode layer, so that the non-filtering color ink particles 642 and the filtering color ink particles 641 are closer to the side wall of the cavity, and the influence on the light emitting of the active light emitting layer 30 is reduced.

As an embodiment of the present invention, optionally, the pixel defining layer includes a plurality of openings, the openings are disposed in one-to-one correspondence with the shared electrodes 20, and expose a portion of the shared electrodes 20, and the active light emitting layer 30 is located in the openings; the vertical projection area of the opening on the common electrode 20 is smaller than the vertical projection area of the cavity 63 on the common electrode 20.

Specifically, fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention, referring to fig. 10 and 11, openings are disposed in one-to-one correspondence with the common electrodes 20, and a portion of the common electrodes 20 are exposed, that is, the size of the common electrodes 20 is larger than that of the active light emitting layer 30. The vertical projection area of the opening on the shared electrode 20 is smaller than the vertical projection area of the cavity 63 on the shared electrode 20, so that the vertical projection of each passive display unit on the driving back plate 10 is larger than the vertical projection of each active light emitting unit. In the filtering process, after the non-filtering charged ink particles 642 are driven to the right lower portion or the left lower portion of the cavity 63, the vertical projection of the non-filtering charged ink particles 642 on the shared electrode 20 and the vertical projection of the active light emitting layer 30 (R/G/B) on the shared electrode 20 are not overlapped, so that the influence of the non-filtering charged ink particles 642 on the filtering effect can be reduced.

Fig. 12 is a schematic structural view of another display panel according to an embodiment of the present invention, and fig. 13 is a schematic structural view of another display panel according to an embodiment of the present invention, referring to fig. 12 and 13, as an alternative embodiment of the present invention, in each cavity 63, the number of color filter ink particles 641 is greater than the number of color non-filter ink particles 642.

Specifically, in the filtering process, after the filter ink particles 641 are driven to the upper right or upper left of the cavity 63, the vertical projection of the filter ink particles 641 on the common electrode 20 can be increased, and the overlapping area of the bottom of the cavity 63, which can pass through the light emitting sub-pixel, can be increased, thereby enhancing the filtering effect of the filter ink particles 641.

Fig. 14 is a schematic structural view of another display panel provided by the embodiment of the present invention, and fig. 15 is a schematic structural view of another display panel provided by the embodiment of the present invention, referring to fig. 14 and fig. 15, as an optional implementation manner of the present invention, each cavity 63 further includes a plurality of uncharged ink particles (643), and the color of the uncharged ink particles (643) is a color filter.

It will be appreciated that each cavity 63 includes at least two colors of ink particles, wherein a portion of the ink particles are colored as filtered and a portion of the ink particles are colored as unfiltered. The ink particles of all the colors that are non-filter colors are charged to form non-filter colored charged ink particles 642; some of the ink particles having a color of a filter are charged to form filter-colored charged ink particles 641, and other ink particles having a color of a filter are uncharged to form filter-colored uncharged ink particles 643. When the passive display layer 60 is multiplexed as the filter layer of the active light emitting layer 30, only the vertical electrode is required to provide the second electric field to the charged ink particles in the corresponding cavity 63, so that the charged ink particles (641/642) can move to both sides of the cavity 63; the uncharged ink particles (643) are located in the middle region; the uncharged ink particles (643) are of a filter color, thereby enabling the light emission sub-pixel to be filtered. In another embodiment of the present invention, the charged ink particles (641/642) may not be all of the filter color, but may be any ink particles (643) that are not charged.

Each cavity 63 includes therein non-charged ink particles (filter colors) and charged ink particles (which may include filter colors or both may be non-filter colors). When low power consumption display is required, the first electrode layer 40 is not powered on, and the second electrode layer 70 and the shared electrode layer are powered on; the first electric field is used for controlling the ink particles with non-filtering colors to move up and down, so that the conversion of pixels between the non-filtering ink particles and the filtering ink particles is realized, and further the display is realized; and the filter particles are uncharged and remain fixed in an intermediate position. When the active light emitting layer 30 emits light, the vertical electrode pair is used to drive the charged ink particles of the non-filter color to the side surface of the cavity 63, and the non-charged ink particles of the filter color fixed at the intermediate position are filtered.

Fig. 16 is a schematic structural view of another display panel provided by the embodiment of the present invention, and fig. 17 is a schematic structural view of another display panel provided by the embodiment of the present invention, referring to fig. 16 and 17, as an alternative embodiment of the present invention, a vertical electrode is commonly used between two adjacent non-cavities 63. The first vertical electrodes L1 and the second vertical electrodes L2 are alternately arranged in sequence. Thereby, the number of vertical electrodes can be reduced, the cost of the display device can be reduced, and the complexity of the manufacturing can be reduced. Moreover, the occupied area of the vertical electrode can be reduced, and the number of the display panel sub-pixels can be increased.

In addition, in a microcup electrophoretic display, the vertical electrodes may be disposed inside the grooves 601 of the microcups 632, or outside the grooves 601 of the microcups 632 (as in fig. 9), or in the walls 602 of the microcups 632.

The embodiment of the invention also provides a display device, which comprises the display panel described in any embodiment, and has the same technical effects, and the description is omitted here.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A display panel, comprising:

a drive back plate;

2. The display panel of claim 1, wherein the display panel comprises,

each shared electrode and the active light-emitting layer and the first electrode layer which are positioned at one side of the shared electrode form an active light-emitting unit; each sharing electrode and the passive display layer and the second electrode layer which are positioned at one side of the sharing electrode form a passive display unit;

3. The display panel of claim 2, further comprising a touch layer; the second electrode layer is multiplexed into one touch electrode layer in the touch layers;

4. A display panel according to claim 3, wherein when the passive display layer is an electrowetting display layer, the passive display layer comprises a hydrophobic layer and a first electrowetting ink layer; the hydrophobic layer is positioned on one side of the first electrowetting ink layer close to the driving backboard;

the encapsulation layer is multiplexed into the hydrophobic layer.

5. A display panel according to claim 3, wherein when the passive display layer is an electrophoretic display layer, the passive display layer comprises:

6. A display panel according to claim 3, wherein when the passive display layer is an electrophoretic display layer, the passive display layer comprises:

a plurality of cavities, each of which is filled with an electrophoretic fluid having charged ink particles of two colors; wherein, the color of some of the said charged ink particles is the color of the filtering, the color of some of the said charged ink particles is the color of the non-filtering;

a plurality of vertical electrode pairs, each vertical electrode pair comprising a first vertical electrode and a second vertical electrode; each cavity is positioned between a first vertical electrode and a second vertical electrode of one vertical electrode pair; when the passive display layer is multiplexed as the filter layer of the active luminescent layer, the first vertical electrode and the second vertical electrode are used for providing a second electric field for charged ink particles; under the combined action of the first electric field and the second electric field, the filter ribbon electric ink particles cover at least part of the top area of the cavity, and the vertical projection of the filter ribbon electric ink particles positioned at the top of the cavity on the bottom of the cavity is not overlapped with at least part of the area where the non-filter ribbon electric ink particles positioned at the bottom of the cavity are positioned.

7. The display panel according to claim 6, wherein one side of the driving back plate further comprises a pixel defining layer, the pixel defining layer comprises a plurality of openings, the openings are arranged in one-to-one correspondence with the sharing electrodes, and expose a portion of the sharing electrodes, and the active light emitting layer is located in the openings;

8. A display panel according to claim 3, wherein when the passive display layer is an electrophoretic display layer, the passive display layer comprises:

a plurality of vertical electrode pairs, each vertical electrode pair comprising a first vertical electrode and a second vertical electrode; each cavity is positioned between a first vertical electrode and a second vertical electrode of one vertical electrode pair; when the passive display layer is multiplexed as the filter layer of the active light-emitting layer, the first vertical electrode and the second vertical electrode are used for providing a second electric field for charged ink particles so as to drive the charged ink particles to the side face of the cavity body, and the non-charged ink particles with the light color are filtered.

9. A display panel according to any one of claims 5, 6 and 8, wherein a vertical electrode is shared between two adjacent cavities; the first vertical electrodes and the second vertical electrodes are alternately arranged in sequence;

the cavity comprises microcapsules or microcups.

10. A display device comprising the display panel according to any one of claims 1 to 9.