CN116434705A - Driving circuit, display panel and display device - Google Patents

Abstract

The application provides a driving circuit, a display panel and a display device. The display panel comprises a driving substrate and a driving circuit layer; the anode electrode layer is arranged on one side of the driving circuit layer and is electrically connected with the driving circuit layer; the organic light-emitting layer is arranged on one side of the anode electrode layer, which is far away from the driving circuit layer, and comprises a plurality of light-emitting units; the cathode electrode layer is arranged on one side of the organic light-emitting layer far away from the driving circuit layer and is electrically connected with the driving circuit layer; the phase change structure layer arranged between the anode electrode layer and the driving circuit layer comprises a plurality of phase change units which are arranged corresponding to the light emitting units, and the phase change units comprise phase change materials and have a first state and a second state; the driving element is electrically connected with the driving circuit layer and is used for driving the phase change material to be in a first state or a second state; the first light absorption layer is arranged on one side of the phase change material close to the driving circuit layer. The display panel can effectively reduce the thickness, reduce the power consumption and improve the luminous efficiency and the contrast ratio of the display panel.

Description

Driving circuit, display panel and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a driving circuit, a display panel, and a display device.

Background

An Organic Light-Emitting Diode (OLED) device has a self-luminous structure, and has the advantages of high contrast, wide viewing angle, fast response speed, light weight, thinness and foldability, which is one of the main research directions in the current display field.

Because the OLED self-emits light by itself, it is desirable that the ambient light be absorbed by the OLED as much as possible, so as to avoid the color mixing and interference of the normal color caused by the reflection of the ambient light, and therefore, the OLED display device generally needs to use a circular polarizer, which is an assembly of a polarizer and a 1/4 wave plate, and can absorb the ambient light. However, since the thickness of the circular polarizer is large, the thickness of the display panel cannot be reduced, and thus a new technique is required to replace the effect of the circular polarizer.

Disclosure of Invention

The application provides a drive circuit, a display panel and a display device, and mainly solves the problem that the thickness of the display panel cannot be reduced.

In order to solve the technical problems, one technical scheme adopted by the application is to provide a display panel, which comprises a driving substrate and a driving circuit layer, wherein the driving substrate comprises a driving circuit layer;

the anode electrode layer is arranged on one side of the driving circuit layer and is electrically connected with the driving circuit layer;

the organic light-emitting layer is arranged on one side of the anode electrode layer, which is far away from the driving circuit layer, and comprises a plurality of light-emitting units;

the cathode electrode layer is arranged on one side of the organic light-emitting layer far away from the driving circuit layer and is electrically connected with the driving circuit layer;

the phase change structure layer is arranged between the anode electrode layer and the driving circuit layer; the phase change structure layer comprises a plurality of phase change units which are arranged corresponding to the light emitting units, and the phase change units comprise:

a phase change material having a first state and a second state;

a driving element electrically connected to the driving circuit layer for driving the phase change material in the first state or the second state;

the first light absorption layer is arranged on one side of the phase change material close to the driving circuit layer;

the phase change material can transmit light in a first state, so that the first light absorption layer absorbs ambient light from the outside; the phase change material is capable of reflecting light of the same color as the light emitted by the corresponding light emitting unit in the second state.

Wherein the phase change material is cholesteric liquid crystal; the driving element comprises a first driving electrode and a second driving electrode; the first driving electrode and the second driving electrode are respectively arranged at two opposite sides of the cholesteric liquid crystal and are used for applying driving voltage to the cholesteric liquid crystal.

Wherein the cholesteric liquid crystal is configured to be transitionable from a first state to a second state at the driving voltage and to be recoverable from the second state to the first state after the driving voltage has disappeared.

The phase change unit further comprises a packaging cavity, wherein the packaging cavity is provided with a containing cavity; the phase change material is arranged in the accommodating cavity; the first driving electrode is arranged on one side of the packaging cavity close to the driving circuit layer, and the second driving electrode is arranged on one side of the packaging cavity close to the anode electrode layer.

The packaging layer is provided with a plurality of first conductive through holes which are arranged at intervals with the accommodating cavity, and the anode electrode layer is electrically connected with the driving circuit layer through the first conductive through holes.

Wherein a plurality of the second driving electrodes of the phase change units are connected with each other and electrically connected with the cathode electrode layer; the first driving electrodes of the phase change units are respectively and electrically connected with the driving circuit layer; or (b)

A plurality of first driving electrodes of the phase change cells are connected to each other and electrically connected to the cathode electrode layer; the second driving electrodes of the phase change units are respectively and electrically connected with the driving circuit layer through second conductive through holes of the packaging layer.

The display panel further comprises a second light absorption layer which is arranged on the phase change structure layer and deviates from the driving circuit layer; the second light absorption layer comprises a plurality of light absorption units, and the light absorption units are arranged at positions corresponding to positions between two adjacent phase change units.

Wherein the anode electrode layer is a transparent electrode layer.

In order to solve the above technical problem, another technical solution adopted in the present application is to provide a driving circuit for driving any one of the above mentioned display panels, including:

the judging module is used for judging the state of the display panel;

the driving module is used for driving the phase change unit according to the judging result of the judging module;

wherein, in response to the display panel being in a non-display state, the driving module drives the phase change material to be in the first state through the driving element; in response to the display panel being in a display state, the driving module drives the phase change material to be in the second state through the driving element.

In order to solve the above technical problem, another technical solution adopted in the present application is to provide a display device, including:

a display panel including any one of the display panels described above;

a driving circuit including the driving circuit as described above.

The application provides a driving circuit, a display panel and a display device, wherein the display panel comprises a driving substrate, an anode electrode layer, an organic light-emitting layer, a cathode electrode layer and a phase-change structure layer. Wherein the driving substrate comprises a driving circuit layer; the anode electrode layer is arranged on one side of the driving circuit layer and is electrically connected with the driving circuit layer; the organic light-emitting layer is arranged on one side of the anode electrode layer, which is far away from the driving circuit layer, and further comprises a plurality of light-emitting units; the cathode electrode layer is arranged on one side of the organic light-emitting layer far away from the driving circuit layer and is electrically connected with the driving circuit layer; the phase change structure layer is arranged between the anode electrode layer and the driving circuit layer; the phase change structure layer comprises a plurality of phase change units which are arranged corresponding to the plurality of light emitting units, wherein the phase change units comprise phase change materials with a first state and a second state, a first light absorption layer arranged on one side of the phase change materials close to the driving circuit layer, and a driving element electrically connected with the driving circuit layer; the driving element is used for driving the phase change material to be in a first state or a second state. The display panel is characterized in that a phase change structure layer comprising a phase change material and a driving element is arranged, so that the phase change material transmits light in a first state, the first light absorption layer absorbs ambient light from the outside, and light with the same color as the light emitted by a corresponding light emitting unit can be reflected in a second state; the arrangement reduces the influence of the ambient light on the display panel, enhances the light emitted by the organic light-emitting layer, and improves the light-emitting efficiency and contrast of the display panel; simultaneously, compared with the prior art, the display panel absorbs external environment light through the polaroid, and the display panel adopts the phase change structure layer with smaller thickness, so that the polaroid with larger thickness is omitted, and the thickness of the display panel can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is a schematic diagram of a display panel provided herein absorbing ambient light in a first state;

FIG. 3 is a schematic diagram of a display panel provided herein reflecting ambient light in a second state;

FIG. 4 is a schematic diagram of a phase change structure layer according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a phase change structure layer according to another embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure;

FIG. 7 is a schematic illustration of an electrode connection according to an embodiment of the present disclosure;

FIG. 8 is a schematic illustration of electrode connection according to another embodiment of the present application;

FIG. 9 is a schematic diagram of a driving circuit according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application.

Reference numerals illustrate:

1-driving a substrate; 10-a driving circuit layer; 11-a substrate; 2-an anode electrode layer; a 3-organic light emitting layer; 30-a light emitting unit; 4-a cathode electrode layer; a 5-phase change structural layer; a 50-phase change cell; 51-phase change material; 52-a driving element; 52 a-a first drive electrode; 52 b-a second drive electrode; 53-packaging the cavity; 53 a-a receiving cavity; 6-a first light absorbing layer; 7-a second light absorbing layer; 70-a light absorbing unit; 100-a display panel; 200-a driving circuit; 300-judging module; 400-a driving module; 500-a display device; a-a first conductive via; and a B-packaging layer.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, interfaces, techniques, etc., in order to provide a thorough understanding of the present application.

The terms "first," "second," "third," and the like in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

An OLED (Organic Light-Emitting Diode) display device in the prior art is a self-luminous structure. When the OLED emits light, the external natural light irradiates the OLED display panel, and the light is reflected from the metal cathode after penetrating through the packaging layer, so that the reflected light from the cathode can cause great imaging interference, display contrast is reduced, interference of a user during reading is caused, and the dark state is not dark, and therefore the OLED display device needs to adopt a circular polarizer to solve the problem. The circular polarizer is an assembly formed by combining a linear polarizer and a 1/4 wave plate, and external natural light sequentially becomes linear polarized light and circular polarized light through a linear polarizing film and a 1/4 phase delay plate; after being reflected by the OLED metal cathode, the light becomes circularly polarized light with opposite rotation directions; then the light passes through a 1/4 phase delay film to become linearly polarized light with the vibration direction perpendicular to the polarization direction of the linearly polarized film; the linearly polarized light cannot pass through, so that the reflection interference of the external environment light is restrained.

However, the thickness of the circularly polarizing plate is large (usually about 100 um), and thus the thickness of the display panel cannot be reduced.

The application provides a driving circuit, a display panel and a display device. According to the display panel, the phase change structure layer comprising the phase change material, the driving element and the first light absorption layer is arranged, the phase change material can transmit light in the first state, so that the first light absorption layer absorbs ambient light from the outside, and the influence of the ambient light on the display panel is reduced; in the second state, light of the same color as the emitted light of the corresponding light emitting unit can be reflected; the arrangement reduces the influence of the ambient light on the display panel, enhances the light emitted by the organic light-emitting layer, and improves the light-emitting efficiency and contrast of the display panel; meanwhile, compared with the prior art, the display panel absorbs external environment light through the polaroid, and the phase change structure layer with smaller thickness is adopted by the display panel, so that the polaroid with larger thickness is omitted, and the thicknesses of the display panel and the display device can be effectively reduced.

The present application is described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the disclosure. In this embodiment, the present application provides adisplay panel 100, thedisplay panel 100 including a drivingsubstrate 1, ananode electrode layer 2, an organiclight emitting layer 3, acathode electrode layer 4, and a phasechange structure layer 5.

Wherein thedrive substrate 1 comprises adrive circuit layer 10. Theanode electrode layer 2 is disposed on one side of the drivingcircuit layer 10 and is electrically connected to thedriving circuit layer 10. Ananode electrode layer 2 is disposed between the organiclight emitting layer 3 and the phasechange structure layer 5, and theanode electrode layer 2 is electrically connected to thedriving circuit layer 10 through the first conductive via a. Thedrive substrate 1 further comprises asubstrate 11, such as a PI flex substrate, provided with adrive circuit layer 10. The drivingcircuit layer 10 includes a Thin Film Transistor (TFT), a data line, a power line, and the like.

Specifically, theanode electrode layer 2 is a transparent electrode layer or a semitransparent electrode layer, so that light can at least partially pass through theanode electrode layer 2. Preferably, in a specific embodiment, theanode electrode layer 2 is a ITO (Indium Tin Oxide) layer or other transparent conductive material layer. In addition, theanode electrode layer 2 can adopt a transparent conductive material layer without having a reflecting function, so that a conductive material containing Ag is not needed, and the preparation cost can be effectively reduced.

The organiclight emitting layer 3 is disposed on a side of theanode electrode layer 2 away from the drivingcircuit layer 10, and the organiclight emitting layer 3 further includes a plurality of light emittingunits 30. In a specific embodiment, the plurality of light emittingunits 30 includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit. In this embodiment, the organiclight emitting layer 3 includes a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Emitting Material Layer (EML), an Electron Transport Layer (ETL), and an Electron Injection Layer (EIL) stacked in this order.

Thecathode electrode layer 4 is disposed on a side of the organiclight emitting layer 3 away from the drivingcircuit layer 10 and electrically connected to thedriving circuit layer 10. Specifically, thecathode electrode layer 4 is electrically connected to thedriving circuit layer 10 through the edge of thedisplay panel 100. Thecathode electrode layer 4 may be a whole layer, or may be provided corresponding to each of the plurality of light emittingunits 30.

With continued reference to fig. 1, the phasechange structure layer 5 is disposed between theanode electrode layer 2 and the drivingcircuit layer 10; the phasechange structure layer 5 includes a plurality ofphase change cells 50 disposed corresponding to the plurality of light emittingcells 30. Thephase change cell 50 includes aphase change material 51 having a first state and a second state, a drivingelement 52 electrically connected to thedriving circuit layer 10, and a firstlight absorbing layer 6 disposed on a side of thephase change material 51 adjacent to thedriving circuit layer 10. In an implementation, the drivingelement 52 is configured to drive thephase change material 51 to be in the first state or the second state. The specific material of thephase change material 51 is not limited as long as it can be switched between the first state and the second state, and may be, for example, liquid crystal. The structure of the drivingelement 52 is not limited as long as it can drive thephase change material 51 to switch between the first state and the second state. The manner in which thephase change material 51 is driven by the drivingelement 52 to switch between the first state and the second state may be an electric field, a magnetic field, heating, illumination, etc. In a specific embodiment, the firstlight absorbing layer 6 is a black material light absorbing layer.

Referring to fig. 1, fig. 2 and fig. 3, fig. 2 is a schematic diagram of a display panel provided in the present application for absorbing ambient light in a first state. Fig. 3 is a schematic diagram of the display panel provided herein reflecting ambient light in a second state. Wherein, thephase change material 51 is capable of transmitting light in the first state, such that the firstlight absorbing layer 6 absorbs the ambient light from the outside, so as to reduce the influence of the ambient light on thedisplay panel 100; thephase change material 51 is capable of reflecting light of the same color as the light emitted from the corresponding light emitting unit 30 (including the ambient light from the outside and the light emitted from thelight emitting unit 30 to thephase change material 51 side) in the second state to further enhance the light emitted from the plurality of light emittingunits 30 of the organiclight emitting layer 3, thereby improving the light emitting efficiency and contrast of thedisplay panel 100. For example, thephase change element 50 corresponds to thelight emitting element 30 that emits red light, and thephase change material 51 reflects red light in the second state; thephase change element 50 corresponds to thelight emitting element 30 which emits green light, and thephase change material 51 reflects green light in the second state. Specifically, the plurality ofphase change cells 50 includes aphase change cell 50 for reflecting red light, aphase change cell 50 for reflecting green light, and aphase change cell 50 for reflecting blue light, corresponding to the red light emitting cell, the green light emitting cell, and the blue light emitting cell, respectively.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a phase change structure layer according to an embodiment of the present application. Thephase change material 51 is cholesteric liquid crystal in this embodiment. The drivingelement 52 includes afirst driving electrode 52a and asecond driving electrode 52b; thefirst driving electrode 52a and thesecond driving electrode 52b are disposed on opposite sides of the cholesteric liquid crystal, respectively, for applying a driving voltage to the cholesteric liquid crystal. Thefirst driving electrode 52a is disposed on a side of thephase change material 51 close to thedriving circuit layer 10, and thesecond driving electrode 52b is disposed on a side of thephase change material 51 close to theanode electrode layer 2, that is, thefirst driving electrode 52a and thesecond driving electrode 52b are respectively disposed on two sides of thephase change material 51 perpendicular to the phasechange structure layer 5. In a specific embodiment, the cholesteric liquid crystal material may be a thermochromic material or a liquid crystal material. It will be appreciated that in other embodiments, thefirst driving electrode 52a and thesecond driving electrode 52b may be disposed on two sides of thephase change material 51 parallel to the phasechange structure layer 5, respectively, according to the liquid crystal material used for thephase change material 51. Fig. 5 is a schematic structural diagram of a phase change structure layer according to another embodiment of the present application. In this embodiment, thefirst driving electrode 52a and thesecond driving electrode 52b are disposed at intervals on the same side of thephase change material 51 away from the drivingcircuit layer 10, and are disposed at positions away from thephase change material 51. In this way, the cholesteric liquid crystals emitting different light can share the samefirst driving electrode 52a or share the samesecond driving electrode 52b, so that the structure of the phasechange structure layer 5 is simpler, besides, the drivingelement 52 arranged in this way does not need to use transparent materials, and light emitted by thelight emitting unit 30 can be prevented from being blocked.

With continued reference to fig. 4, the cholesteric liquid crystal is configured to be capable of transitioning from a first state to a second state at a drive voltage and to be capable of returning from the second state to the first state after the drive voltage has disappeared. It can be understood that when thedisplay panel 100 does not develop color, thefirst driving electrode 52a and thesecond driving electrode 52b on both sides of the cholesteric liquid crystal do not provide voltage, and at this time, the cholesteric liquid crystal is in the first state, the ambient light reaching the cholesteric liquid crystal via the organiclight emitting layer 3 can penetrate the cholesteric liquid crystal, and further the ambient light is absorbed by the firstlight absorbing layer 6, so as to reduce the influence of the external ambient light on thedisplay panel 100, and simultaneously make thedisplay panel 100 have a better black state when not displaying; further, thedisplay panel 100 is generally in the non-display state for a longer period of time, and no voltage is applied to the cholesteric liquid crystal in the non-display state, thereby saving energy and power. When thedisplay panel 100 needs to develop color during use, thefirst driving electrode 52a and thesecond driving electrode 52b on both sides of the cholesteric liquid crystal provide voltages, and at this time, the cholesteric liquid crystal is in the second state, ambient light reaching the cholesteric liquid crystal through the organiclight emitting layer 3 or light emitted from the organiclight emitting layer 3 to thephase change material 51 side is reflected by the cholesteric liquid crystal, and the reflected light passes through the organiclight emitting layer 3, so as to enhance the light of the organiclight emitting layer 3, thereby improving the light emitting efficiency and contrast of thedisplay panel 100.

Referring further to fig. 4, thephase change cell 50 of the present embodiment further includes anencapsulation cavity 53. Thepackage cavity 53 has ahousing cavity 53a; cholesteric liquid crystal is disposed in theaccommodation chamber 53 a. Specifically, thepackaging cavity 53 is a micro-cup, and the height of the micro-cup is 20um-50um; the area of theaccommodating cavity 53a is larger than or equal to the opening area of the anode pixel (not shown), which is beneficial to ensuring the pixel opening and preventing the pixel opening from being affected.

Referring further to fig. 1 and 4, thefirst driving electrode 52a is disposed on a surface of a side of theencapsulation cavity 53 close to thedriving circuit layer 10, thesecond driving electrode 52b is disposed on a surface of a side of theencapsulation cavity 53 close to theanode electrode layer 2, and an insulating layer (not shown) is disposed between thesecond driving electrode 52b and theanode electrode layer 2 to ensure insulation between thesecond driving electrode 52b and theanode electrode layer 2. The plurality ofpackaging cavities 53 of the plurality ofphase change units 50 are connected with each other to form a packaging layer B, the packaging layer B has a plurality of first conductive through holes a spaced from theaccommodating cavity 53a, and the above-mentionedanode electrode layer 2 is electrically connected with the drivingcircuit layer 10 through the first conductive through holes a, so as to realize electric signal transmission. It will be appreciated that in a specific embodiment, the specific first conductive via a position and the number of first conductive vias a may be designed according to the design of thedisplay panel 100, which is not limited herein, so long as the electrical connection is ensured.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a display panel according to another embodiment of the present application. Thedisplay panel 100 provided in this embodiment is substantially the same as thedisplay panel 100 provided in fig. 1, except that thedisplay panel 100 of this embodiment further includes a secondlight absorption layer 7 disposed on the phasechange structure layer 5 facing away from the drivingcircuit layer 10. The secondlight absorbing layer 7 includes a plurality of light absorbingunits 70, and thelight absorbing units 70 are disposed corresponding to positions between two adjacentphase change units 50, and are configured to absorb different color lights reflected from thephase change units 50, so as to avoid color mixing between thephase change units 50. Specifically, the secondlight absorbing layer 7 may be located between the electrode layer where thesecond driving electrode 52b is located and theanode electrode layer 2, and may also be provided in the same layer as thesecond driving electrode 52 b.

Referring to fig. 6 and fig. 7, fig. 7 is a schematic diagram of an electrode connection according to an embodiment of the present application. The plurality ofsecond driving electrodes 52b of the plurality ofphase change cells 50 are connected to each other. Specifically, the plurality ofsecond driving electrodes 52b may be connected in a mesh shape, or may be a continuous one-layer structure, as long as the plurality ofsecond driving electrodes 52b may be connected to each other, which is not limited in this application. In the present embodiment, a plurality ofsecond driving electrodes 52b are mainly used as a continuous whole layer for illustration; the plurality ofsecond driving electrodes 52b have openings corresponding to the first conductive vias a to avoid shorting thesecond driving electrodes 52b to theanode electrode layer 2. Thesecond driving electrode 52b is electrically connected to thecathode electrode layer 4 at the edge of thedisplay panel 100. The plurality offirst driving electrodes 52a of the plurality ofphase change cells 50 are electrically connected to the driving circuit units in thedriving circuit layer 10, respectively.

Referring to fig. 6 and 8, fig. 8 is a schematic view of an electrode connection according to another embodiment of the present application. The plurality offirst driving electrodes 52a of the plurality ofphase change cells 50 are connected to each other. Specifically, the plurality offirst driving electrodes 52a may be connected in a mesh shape, or may be a continuous one-layer structure, as long as the plurality offirst driving electrodes 52a may be connected to each other, which is not limited in this application. In the present embodiment, thefirst driving electrode 52a is mainly taken as a continuous whole layer. Thefirst driving electrode 52a is electrically connected to thecathode electrode layer 4 at the edge of thedisplay panel 100. The packaging layer B further has a plurality of second conductive vias (not shown) spaced apart from theaccommodating cavity 53a, and the plurality of second driving electrodes 52B of the plurality ofphase change units 50 are electrically connected to thedriving circuit layer 10 through the second conductive vias of the packaging layer B, respectively.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a driving circuit according to an embodiment of the present application. The present application also provides adriving circuit 200 for driving thedisplay panel 100 related to the above-described embodiment. The drivingcircuit 200 includes a judgingmodule 300 and adriving module 400. Referring to fig. 9 and 6, the judgingmodule 300 is configured to judge a state of thedisplay panel 100; thedriving module 400 is used for driving thephase change unit 50 of thedisplay panel 100 according to the determination result of the determiningmodule 300. Wherein, in response to thedisplay panel 100 being in the non-display state, thedriving module 400 drives thephase change material 51 to be in the first state through the drivingelement 52; in response to thedisplay panel 100 being in the display state, thedriving module 400 drives thephase change material 51 to be in the second state through the drivingelement 52. That is, in the non-display state of thedisplay panel 100, ambient light reaching thephase change material 51 through the organiclight emitting layer 3 is absorbed by thephase change material 51, so that thedisplay panel 100 has a better black state when not displayed; further, thedisplay panel 100 is generally in the non-display state for a longer period of time, and no voltage is applied to the cholesteric liquid crystal in the non-display state, thereby saving energy and power. In the display state of thedisplay panel 100, ambient light reaching thephase change material 51 through the organiclight emitting layer 3 is reflected by thephase change material 51, and the reflected light passes through the organiclight emitting layer 3, thereby enhancing the light of the organiclight emitting layer 3 and improving the light emitting efficiency and contrast of thedisplay panel 100.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application. The present application also provides adisplay device 500 including thedisplay panel 100 and the drivingcircuit 200. The specific structure and function of thedisplay panel 100 and the drivingcircuit 200 can be referred to the description of thedisplay panel 100 and the drivingcircuit 200 provided in the above embodiments, and will not be repeated here. Thedisplay device 500 may be a self-luminous product, such as a notebook computer, a mobile phone, a television, etc. made of an OLED and a Mini-LED.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (10)

1. A display panel, comprising:

a driving substrate including a driving circuit layer;

the anode electrode layer is arranged on one side of the driving circuit layer and is electrically connected with the driving circuit layer;

the organic light-emitting layer is arranged on one side of the anode electrode layer, which is far away from the driving circuit layer, and comprises a plurality of light-emitting units;

the cathode electrode layer is arranged on one side of the organic light-emitting layer far away from the driving circuit layer and is electrically connected with the driving circuit layer;

the solar cell is characterized by further comprising a phase change structure layer which is arranged between the anode electrode layer and the driving circuit layer; the phase change structure layer comprises a plurality of phase change units which are arranged corresponding to the light emitting units, and the phase change units comprise:

a phase change material having a first state and a second state;

a driving element electrically connected to the driving circuit layer for driving the phase change material in the first state or the second state;

the first light absorption layer is arranged on one side of the phase change material close to the driving circuit layer;

the phase change material can transmit light in a first state, so that the first light absorption layer absorbs ambient light from the outside; the phase change material is capable of reflecting light of the same color as the light emitted by the corresponding light emitting unit in the second state.

2. The display panel of claim 1, wherein the phase change material is cholesteric liquid crystal; the driving element comprises a first driving electrode and a second driving electrode; the first driving electrode and the second driving electrode are respectively arranged at two opposite sides of the cholesteric liquid crystal and are used for applying driving voltage to the cholesteric liquid crystal.

3. The display panel according to claim 2, wherein the cholesteric liquid crystal is configured to be transitionable from a first state to a second state at the driving voltage and to be recoverable from the second state to the first state after the driving voltage is lost.

4. The display panel of claim 2, wherein the phase change cell further comprises an encapsulation cavity having a receiving cavity; the phase change material is arranged in the accommodating cavity; the first driving electrode is arranged on one side of the packaging cavity close to the driving circuit layer, and the second driving electrode is arranged on one side of the packaging cavity close to the anode electrode layer.

5. The display panel of claim 4, wherein a plurality of the encapsulation cavities of the plurality of phase change cells are connected to each other to form an encapsulation layer having a plurality of first conductive vias disposed at intervals from the accommodation cavities, and the anode electrode layer is electrically connected to the driving circuit layer through the first conductive vias.

6. The display panel of claim 5, wherein a plurality of the second driving electrodes of a plurality of the phase change cells are connected to each other and electrically connected to the cathode electrode layer; the first driving electrodes of the phase change units are respectively and electrically connected with the driving circuit layer; or (b)

A plurality of first driving electrodes of the phase change cells are connected to each other and electrically connected to the cathode electrode layer; the second driving electrodes of the phase change units are respectively and electrically connected with the driving circuit layer through second conductive through holes of the packaging layer.

7. The display panel of claim 5, further comprising a second light absorbing layer disposed on the phase change structure layer facing away from the drive circuit layer; the second light absorption layer comprises a plurality of light absorption units, and the light absorption units are arranged at positions corresponding to positions between two adjacent phase change units.

8. The display panel of claim 1, wherein the anode electrode layer is a transparent electrode layer.

9. A driving circuit for driving the display panel of any one of claims 1-8, comprising:

the judging module is used for judging the state of the display panel;

the driving module is used for driving the phase change unit according to the judging result of the judging module;

wherein, in response to the display panel being in a non-display state, the driving module drives the phase change material to be in the first state through the driving element; in response to the display panel being in a display state, the driving module drives the phase change material to be in the second state through the driving element.

10. A display device, comprising:

a display panel comprising the display panel of any one of claims 1-8;

a drive circuit comprising the drive circuit of claim 9.

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