CN112859412B

CN112859412B - Display panel, preparation method thereof and display device

Info

Publication number: CN112859412B
Application number: CN202110231795.7A
Authority: CN
Inventors: 丘鹤元; 吴小林; 谢鑫; 王巧妮; 陈惠�; 黄艺芳; 张新宇; 王建树; 胡松; 洪贵春
Original assignee: BOE Technology Group Co Ltd; Fuzhou BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Fuzhou BOE Optoelectronics Technology Co Ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2022-06-07
Anticipated expiration: 2041-03-02
Also published as: CN112859412A

Abstract

The embodiment of the disclosure provides a display panel, a preparation method thereof and a display device, wherein the display panel comprises: the display substrate and the box base plate to the box setting and setting are in display substrate with to the mixture layer between the box base plate, the mixture layer includes: a photopolymer monomer material and a liquid crystal material; the preparation method comprises the following steps: the mixture layer is irradiated with interference light to form a grating.

Description

Display panel, preparation method thereof and display device

Technical Field

The embodiment of the disclosure relates to but is not limited to the technical field of display, and in particular relates to a display panel, a preparation method thereof and a display device.

Background

In recent years, 3D (three-dimensional) display has become a large trend in the display field. Compared to 2D (two-dimensional) display, 3D display technology can make a picture become stereoscopic realistic. 3D display technology has been widely applied to many fields such as television entertainment, computer games, flight simulation systems, medical imaging systems, and the like.

At present, some 3D display panels do not have a 2D/3D display switching function, and in order to implement the 2D/3D display switching function, it is usually necessary to additionally add other components (such as a cylindrical microlens array, a grating, etc.) outside the display panel, so that the overall thickness of the display panel is relatively thick, and the manufacturing cost is relatively high.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

In a first aspect, an embodiment of the present disclosure provides a method for manufacturing a display panel, where the display panel includes: the display substrate and the box base plate to the box setting and setting are in display substrate with to the mixture layer between the box base plate, the mixture layer includes: a photopolymer monomer material and a liquid crystal material; the preparation method comprises the following steps: the mixture layer is irradiated with interference light to form a grating.

In a second aspect, an embodiment of the present disclosure provides a display panel, including: the display substrate that sets up to the box and to the box base plate and setting be in the display substrate with to the mixture layer between the box base plate, wherein, the mixture layer includes: and the grating is formed by the interference light irradiation of the photosensitive polymer monomer material and the liquid crystal in the mixture layer.

In a third aspect, the present disclosure provides a display device, including the display panel described above.

The display panel, the preparation method thereof and the display device provided by the embodiment of the disclosure, the display panel may include: to the display substrate that the box set up with to the box base plate and set up at display substrate and to the mixture layer between the box base plate, the mixture layer includes: a photopolymer monomer material and a liquid crystal material; the preparation method of the display panel can comprise the following steps: the mixture layer is irradiated with interference light to form a grating. Therefore, the grating can be integrally manufactured in the display panel box through the mixture layer in the display panel box. Therefore, the display panel has the 2D/3D display switching function through the grating in the display panel box, so that the grating does not need to be arranged outside the display panel, the thickness of the display panel can be prevented from being increased, the display panel with the 2D/3D display switching function and low in thickness is realized, and the manufacturing cost can be reduced.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the disclosure. Other advantages of the disclosure may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.

Drawings

The accompanying drawings are included to provide an understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure. The shapes and sizes of the various elements in the drawings are not to be considered as true proportions, but are merely intended to illustrate the present disclosure.

Fig. 1 is a schematic flow chart illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure;

FIG. 2A is a schematic diagram of a display panel for three-dimensional (3D) display according to an embodiment of the disclosure;

FIG. 2B is a schematic diagram illustrating a two-dimensional (2D) display of the display panel according to an embodiment of the disclosure;

FIG. 3 is a schematic structural diagram of a display panel according to an embodiment of the disclosure;

FIG. 4 is a schematic diagram of a grating in a display panel in an embodiment of the disclosure;

FIG. 5 is a schematic structural diagram of a display panel according to an embodiment of the disclosure;

FIG. 6 is a schematic diagram illustrating an arrangement of light emitting elements in a display substrate according to an embodiment of the disclosure;

fig. 7 is a schematic diagram of a first control electrode in a cartridge substrate in an embodiment of the disclosure.

Description of reference numerals:

11-a display substrate; 12-pair of cassette substrates; 10-a first substrate base plate;

20-a drive circuit layer; 30-a light emitting device layer; 40-a first control electrode;

50-a grating; 60-a grating regulating circuit; 70-an encapsulation layer;

301-an anode; 302-pixel definition layer; 303 — an organic light emitting layer;

304-a cathode; 401-bulk electrodes; 80-a second substrate base plate;

201-a transistor; 202-a storage capacitor; 3031-a hole transport layer;

3032-electron blocking layer; 3033-a light-emitting layer; 3034-hole blocking layer;

3035-electron transport layer; 305-a light emitting element; 601-a regulating transistor;

701-a first encapsulation layer; 702-a second encapsulation layer; 703-a third encapsulation layer;

501-polymer rich zone; 502-liquid-rich crystal region.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can readily appreciate the fact that the forms and details may be varied into a variety of forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.

In the drawings, the size of each component, the thickness of layers, or regions may be exaggerated for clarity. Therefore, one aspect of the present disclosure is not necessarily limited to the dimensions, and the shapes and sizes of the respective components in the drawings do not reflect a true scale. Further, the drawings schematically show ideal examples, and one embodiment of the present disclosure is not limited to the shapes, numerical values, and the like shown in the drawings.

The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number.

In this specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships are used to explain positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure. The positional relationship of the components is changed as appropriate in accordance with the direction in which each component is described. Therefore, the words described in the specification are not limited to the words described in the specification, and may be replaced as appropriate.

In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly specified or limited. For example, it may be a fixed connection, or a removable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or both may be interconnected. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

In this specification, a transistor refers to an element including at least three terminals, i.e., a gate electrode (a gate or a control electrode), a drain electrode, and a source electrode. The transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, a channel region refers to a region where current mainly flows.

In this specification, the first electrode may be a drain electrode and the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. In the case of using transistors of opposite polarities, or in the case of changing the direction of current flow during circuit operation, the functions of the "source electrode" and the "drain electrode" may be interchanged. Therefore, in this specification, "source electrode" and "drain electrode" may be exchanged with each other.

In this specification, "electrically connected" includes a case where constituent elements are connected together by an element having some kind of electrical action. The "element having a certain electric function" is not particularly limited as long as it can transmit and receive an electric signal between connected components. Examples of the "element having some kind of electric function" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having various functions, and the like.

"about" in the disclosed embodiments refers to a numerical value that is not narrowly defined, but is within the tolerance of the process and measurement.

In the embodiment of the present disclosure, the first direction is a thickness direction (Z direction) of the display panel on a plane perpendicular to the display panel; the second direction refers to a direction (X direction) perpendicular to the first direction on a plane perpendicular to the display panel; the third direction refers to a direction (Y direction) perpendicular to the second direction on a plane parallel to the display panel.

The embodiment of the disclosure provides a preparation method of a display panel. The display panel may include: to the display substrate that the box set up with to the box base plate and set up at display substrate and to the mixture layer between the box base plate, the mixture layer includes: a photopolymer monomer material and a liquid crystal material; the preparation method of the display panel can comprise the following steps: the mixture layer is irradiated with interference light to form a grating. Therefore, the grating can be integrally manufactured in the display panel box through the mixture layer in the display panel box. Therefore, the display panel has the 2D/3D display switching function through the grating in the display panel box, so that the grating does not need to be arranged outside the display panel, the thickness of the display panel can be prevented from being increased, the display panel with the 2D/3D display switching function and low in thickness is realized, and the manufacturing cost can be reduced.

In one exemplary embodiment, a mixture including a photopolymer monomer material and a liquid crystal material may be encapsulated between a display substrate and a CELL-to-CELL substrate by a CELL encapsulation process to form a mixture layer, such that a grating is formed through the mixture layer. Then, the method of manufacturing the display panel may include: the mixture layer is irradiated with interference light after the display substrate and the opposing-to-cell substrate are aligned with each other to form a grating.

In an exemplary embodiment, taking the case that the mixture layer is formed between the display substrate and the opposing box substrate through the opposing box encapsulation process as an example, before the interfering light is irradiated to the mixture layer to form the grating, the method for manufacturing the display panel may further include: providing a display substrate and a box aligning substrate; the display substrate and the cell-opposing substrate are cell-aligned to form a polymer liquid crystal cell, and a mixture of a pre-mixed photopolymer monomer material and a liquid crystal material is injected into the polymer liquid crystal cell to form a mixture layer.

Fig. 1 is a schematic flow chart of a method for manufacturing a display panel in an embodiment of the present disclosure, and in an exemplary embodiment, as shown in fig. 1, the method for manufacturing a display panel may include:

step 101: providing a display substrate and a box aligning substrate;

step 102: aligning the display substrate and the alignment substrate to form a polymer liquid crystal cell, and injecting a mixture of a pre-mixed photopolymer monomer material and a liquid crystal material into the polymer liquid crystal cell to form a mixture layer;

step 103: the mixture layer is irradiated with interference light to form a grating.

For example, the cell thickness of a polymer liquid crystal cell may be about 20 μm (micrometers). For example, when the photopolymer monomer material and the liquid crystal material are encapsulated between the display substrate and the opposing-to-cell substrate through the opposing-to-cell encapsulation process, spacers may be dispersed between the display substrate and the opposing-to-cell substrate to support the cell thickness. For example, the shape of the spacer may be cylindrical. For example, the number of the spacers may be plural. Here, the embodiment of the present disclosure does not limit this.

For example, the edge of the surface of the display substrate and the opposite-box substrate may be coated with the frame sealing adhesive, a mixture of a photosensitive polymer monomer material and a liquid crystal material is dropped in an area surrounded by the frame sealing adhesive on the substrate coated with the frame sealing adhesive (i.e., a dropping method), and then the display substrate and the opposite-box substrate are opposed to each other and are bonded to each other by the frame sealing adhesive to form the polymer liquid crystal cell. For example, the frame sealing adhesive may be cured by uv irradiation or heating, so as to form a polymer liquid crystal cell (i.e. a cell-to-cell packaging process).

In one exemplary embodiment, the liquid crystal material may be a nematic liquid crystal material, a cholesteric liquid crystal material, a smectic liquid crystal material, or the like. The embodiments of the present disclosure do not limit this.

In one exemplary embodiment, the photopolymer monomeric material may be a polyurethane-based material or an acrylic-based material, or the like. The embodiments of the present disclosure do not limit this.

In one exemplary embodiment, the photopolymer monomeric material can be a visible light polymerizable monomer, an ultraviolet light polymerizable monomer, a laser polymerizable monomer, or the like. Accordingly, the interference light used in the subsequent step may be visible light, ultraviolet light, laser light, or the like, and the wavelength of the interference light may be selected by a person skilled in the art according to the type of the photopolymer monomer material, which is not limited in the embodiment of the present disclosure.

For example, the interference light may be laser light having a wavelength of 532nm (nanometers).

In practical applications, the Polymer Liquid Crystal mainly includes two types of Polymer Dispersed Liquid Crystal (PDLC) and Polymer Network Liquid Crystal (PNLC). Wherein, PDLC is a film formed by uniformly dispersing tiny liquid crystal microdroplets into a substrate which is high molecular polymer. In contrast to PDLC, the liquid crystal in PNLC is not spherical (or ellipsoidal) droplets, but rather is distributed in a three-dimensional network of polymers, forming a network of continuous channels. They have in common: the optical axis orientation of the liquid crystal can be adjusted by applying an electric field, and when the refractive index of the liquid crystal is matched with that of the polymer, light is transmitted and is in a transparent state; when the refractive index of the liquid crystal and the refractive index of the polymer do not match, the light scatters. Then, in one exemplary embodiment, the mixture layer in the embodiments of the present disclosure may be a polymer dispersed liquid crystal layer. Thus, under the irradiation of holographic interference light, the mixture of the uniformly mixed photosensitive polymer monomer material and the liquid crystal material is subjected to a localized photopolymerization reaction, and a holographic polymer/liquid crystal grating (also called a holographic polymer dispersed liquid crystal grating or a holographic grating) can be obtained. Here, the holographic grating may propagate left and right eye pixels alternately appearing in the display panel in left and right directions, respectively, by diffraction and enter human eyes, using diffraction characteristics of the grating.

In the embodiment of the present disclosure, the principle of forming the grating by irradiating the interference light to the mixture layer in the display panel is: the photopolymer monomeric material is consumed a lot in the bright areas of the interference light field to form a polymer, while the photopolymer monomeric material in the dark areas of the interference light is polymerized slowly and consumed a little, so that a concentration gradient between the bright and dark fringes is formed. The chemical potential of the bright areas is also lower than that of the dark areas due to the photopolymerization. In order to maintain the balance of the concentration and the chemical potential of the system, the photosensitive polymer monomer material can diffuse from a dark area with higher concentration and chemical potential in the system to a bright area, and meanwhile, the polymerization of the photosensitive polymer monomer material also enables the liquid crystal material to be separated out from the mixture layer; and as the polymerization reaction is carried out, the concentration of the liquid crystal in a bright area is increased, the liquid crystal is diffused to a dark area with low concentration, and finally, the liquid crystal is in a periodically and alternately distributed liquid crystal rich area and polymer rich area in space to form the grating. Because the refractive indexes of the liquid crystal and the polymer for light are different, the formed grating can generate strong diffraction effect on incident light; however, because the liquid crystal has optical anisotropy and dielectric anisotropy, under the action of an external electric field, the orientation loss of molecules in the liquid crystal layer rotates, so that the refractive index of the liquid crystal layer is adjusted, when the refractive index of the liquid crystal is matched with that of a polymer, the periodic refractive index modulation disappears, and the diffraction characteristic of the grating also disappears. The refractive index of the liquid crystal area can be adjusted at will by adjusting the magnitude of the external electric field, so that the diffraction characteristic of the grating is changed.

As shown in fig. 2A and 2B, the grating 50 may include: the polymer rich regions 501 and the liquid crystal rich regions 502 are spatially present in a periodic alternating distribution. As shown in fig. 2A, when the refractive indexes of the liquid crystal molecules in the polymer-rich region 501 and the polymer are not matched, the grating 50 is in an open state, the grating 50 has an image splitting function, and is used for 3D display, so that the left-eye pixel L is diffracted to the left eye of a person and the right-eye pixel R is diffracted to the right eye of the person, so that the left eye of the person only sees the left-eye image displayed by the left-eye pixel L, and the right eye of the person only sees the right-eye image displayed by the right-eye pixel R, thereby generating a stereoscopic feeling. As shown in fig. 2B, when the refractive index of the liquid crystal molecules in the polymer-rich region 501 is matched with that of the polymer, the grating 50 is in an off state for 2D display, so that the images displayed by the left-eye pixel L and the right-eye pixel R can be seen by both the left eye and the right eye of a human.

The embodiment of the disclosure also provides a display panel. Fig. 3 is a schematic structural diagram of a display panel in an embodiment of the disclosure. As shown in fig. 3, the display panel may include, in a plane perpendicular to the display panel: display substrate 11 and the box base plate 12 of setting to the box and set up the mixture layer between display substrate 11 and the box base plate 12, wherein, the mixture layer includes: the grating 50 is formed by the interference light irradiation of the photopolymer monomer material and the liquid crystal in the mixture layer.

In one exemplary embodiment, as shown in FIG. 4, the grating 50 may be a holographic grating, which may include: a plurality of strip-shaped wire grids arranged in parallel. For example, as shown in fig. 4, the plurality of stripe gratings may be periodically arranged in the second direction (X direction) in a plane parallel to the display panel, and each stripe grating extends in the third direction (Y direction), that is, the extending direction of the stripe grating is parallel to the data line direction and perpendicular to the gate line direction.

In an exemplary embodiment, the grating periods of the different types of sub-pixels may be the same or different. For example, taking the display panel including 3 types of RGB (red, green, and blue) sub-pixels as an example, when the raster of the R sub-pixel is manufactured, the area where the GB sub-pixel is located is masked by a mask, and the raster of the GB sub-pixel is manufactured by analogy, so that rasters of different pixels can have different periods. Or, when the grating of the RGB sub-pixels is manufactured, the grating period of all the sub-pixels can be the same without using a mask.

In an exemplary embodiment, as shown in fig. 3, the pair of cassette substrates 12 may include: a first control electrode 40; the display substrate 11 may include: an anode 301 and a cathode 304, one of the anode 301 and the cathode 304 being a second control electrode; a controllable electric field for regulating the state of the optical grating 50 is formed between the second control electrode and the first control electrode 40, and the optical grating 50 is controlled to be in an on state to switch the display panel to a three-dimensional display state, or the optical grating 50 is controlled to be in an off state to switch the display panel to a two-dimensional display state. Thus, the second control electrode is realized by using one of the anode 301 and the cathode 304, and the second control electrode does not need to be additionally arranged, so that the thickness of the display panel can be reduced, the preparation steps can be reduced, the process flow can be simplified, and the cost can be reduced.

In an exemplary embodiment, as shown in fig. 3, taking the cathode 304 as the second control electrode as an example, when the cathode 304 is applied with the first voltage and the first control electrode 40 is applied with the second voltage which is the same as the first voltage, that is, the cathode 304 and the first control electrode 40 are both applied with the first voltage, the grating 50 may be in an on state under the driving of the controllable electric field formed between the cathode 304 and the first control electrode 40, and at this time, as shown in fig. 2A, the display panel performs three-dimensional (3D) display. Alternatively, when the cathode 304 is applied with a first voltage and the first control electrode 40 is applied with a second voltage different from the first voltage, then the grating 50 may be in the off state under the driving of the controllable electric field formed between the cathode 304 and the first control electrode 40, at which time the display panel performs two-dimensional (2D) display as shown in fig. 2B. For example, the first voltage may be a zero voltage or a ground voltage, or may be other fixed levels, such as a low voltage. For example, the second voltage may be other fixed levels, such as a high voltage.

For example, when the first voltage applied to the cathode 304 is 0V and the second voltage applied to the first control electrode 40 is 0V, the refractive index of the liquid crystal (liquid crystal) in the polymer-rich region in the grating 50 is not matched to the refractive index of the polymer (polymer), such that the grating is in the on state. For another example, when the first voltage applied to the cathode 304 is 0V and the second voltage applied to the first control electrode 40 is 40V, the refractive index of the liquid crystal in the polymer-rich region in the grating 50 matches the refractive index of the polymer, and the grating can be in the off state.

In one exemplary embodiment, after the display substrate and the facing substrate are facing the cell, the first control electrode is positioned opposite to the second control electrode, and the first control electrode and the second control electrode may be transparent electrodes.

In an exemplary embodiment, as shown in fig. 3, the display substrate 11 may include: a first substrate 10, and a driving circuit layer 20, a light emitting device layer 30, and an encapsulation layer 70 sequentially stacked on one side of the first substrate 10 close to the opposing-to-case substrate 12, wherein the light emitting device layer 30 may include: an anode 301, a cathode 304, and an organic light emitting layer 303 between the anode 301 and the cathode 304. The opposing-box substrate 12 may further include: a second substrate base plate 80 and a grating regulating circuit layer 60, wherein the grating regulating circuit layer 60 is located on one side of the second substrate base plate 80 close to the display base plate 11, and the first control electrode 40 is located on one side of the grating regulating circuit layer 60 far from the second substrate base plate 80. In this way, the display substrate 11 and the pair of cell substrates 12 can be independently controlled, wherein the driving circuit layer 20 in the display substrate 11 is used for driving the light emitting element to emit light, and the grating control circuit 60 in the pair of cell substrates 12 is used for controlling the controllable electric field (one of the anode 301 and the cathode 304 is the second control electrode, and the controllable electric field for controlling the state of the grating is formed between the second control electrode and the first control electrode 40).

In one exemplary embodiment, the opposing-to-cartridge substrate may be a Thin Film Transistor (TFT) substrate.

In an exemplary embodiment, the display substrate may be an Organic Light-Emitting Diode (OLED) substrate. For example, the display substrate may be fabricated by an OLED fabrication process. For example, the light emitting element in the display substrate may be a top emission type OLED light emitting element. For example, a transparent cathode may be used and an encapsulation layer deposited or coated for protecting the OLED light emitting elements.

In one exemplary embodiment, the display panel may be an OLED display panel.

The display panel in the embodiment of the present disclosure is described below by taking the display panel as an OLED display panel as an example.

Fig. 5 is another structural schematic diagram of the display panel in the embodiment of the disclosure, which illustrates a structure of three sub-pixels in the display panel. As shown in fig. 5, the display panel may include, in a plane perpendicular to the display panel: the liquid crystal display panel comprises a display substrate 11 and a box-aligning substrate 12 which are arranged opposite to each other, and a grating 50 which is positioned between the display substrate 11 and the box-aligning substrate 12, wherein the grating 50 is formed by irradiating interference light on a photosensitive polymer monomer material and liquid crystal in a mixture layer; among them, the display substrate 11 may include: a first substrate 10, and a driving circuit layer 20, a light emitting device layer 30 and an encapsulation layer 70 sequentially stacked on one side of the first substrate 10 close to the opposing-to-box substrate 12; the opposing-box substrate 12 may include: a second substrate 80, and a grating control circuit layer 60 and a first control electrode 40 sequentially stacked on one side of the second substrate 80 close to the display substrate 11.

In an exemplary embodiment, the driving circuit layer 20 may include: a plurality of pixel driving circuits for respectively driving a plurality of light emitting elements (e.g., OLED devices) to be subsequently formed, the pixel driving circuit of each sub-pixel may include: for clarity and simplicity, fig. 5 illustrates a transistor 201 and a storage capacitor 202 included in a pixel driving circuit corresponding to each sub-pixel, where the transistor 201 is used for coupling with a subsequently formed light emitting element. For example, the pixel driving circuit may adopt a 2T1C (i.e., 2 transistors (T) and one capacitor (C)) structure, a 3T1C structure, a 4T1C structure, a 5T1C structure, a 5T2C structure, a 6T1C structure, a 7T1C structure, and the like, and the circuit structure and layout of the pixel driving circuit may be designed according to actual needs, which is not limited in this disclosure. For example, the driving circuit layer 20 may further include: the present disclosure is not limited to various traces such as scanning signal lines and data signal lines.

For example, as shown in fig. 5, the transistors in the drive circuit layer 20 each include a gate electrode G, a source electrode S, and a drain electrode D. For example, the three electrodes are electrically connected to three electrode connection portions, respectively, for example, via holes filled with tungsten metal (i.e., tungsten vias, W-via); further, the three electrodes may be electrically connected to other electrical structures (e.g., transistors, traces, light emitting elements, etc.) through corresponding electrode connection portions, respectively.

For example, the transistors in the driving circuit layer may be thin film transistors or field effect transistors or other devices having the same characteristics. For example, the thin film transistor used in the embodiment of the present disclosure may be an oxide semiconductor transistor.

In one exemplary embodiment, as shown in fig. 5, the light emitting device layer 30 may include: an anode 301, a pixel defining layer 302, an organic light emitting layer 303, and a cathode 304; wherein the anode 301 is connected to the drain electrode of the transistor 201 through the via; the organic light-emitting layer 303 is connected to the anode 301; the cathode 304 is connected to the organic light-emitting layer 303; the organic light emitting layer 303 emits light of a corresponding color driven by the anode 301 and the cathode 304.

In one exemplary embodiment, as shown in fig. 5, the organic light emitting layer 303 may include: a Hole Injection Layer (HIL), a Hole Transport Layer (HTL) 3031, an Electron Blocking Layer (EBL) 3032, a light Emitting Layer (EML) 3033, a Hole Blocking Layer (HBL) 3034, an Electron Transport Layer (ETL) 3035, and an Electron Injection Layer (EIL) stacked on top of each other. In one exemplary embodiment, the hole injection layer and the electron injection layer of all the sub-pixels may be a common layer connected together, the hole transport layer and the electron transport layer of all the sub-pixels may be a common layer connected together, the hole blocking layer of all the sub-pixels may be a common layer connected together, and the light emitting layer and the electron blocking layer of adjacent sub-pixels may have a small amount of overlap or may be isolated.

In an exemplary embodiment, taking the display substrate as an OLED display substrate as an example, fig. 6 is a schematic layout diagram of light emitting elements in the display substrate of the display panel in the embodiment of the present disclosure, as shown in fig. 6, a light emitting device layer of the display substrate includes: a plurality of OLED light emitting elements 305, each OLED light emitting element 305 correspondingly tiles a sub-pixel region. For example, each light emitting element may include an anode, an organic light emitting layer, and a cathode, which are sequentially stacked. For example, the anode may be electrically connected to the source electrode of the transistor in the corresponding pixel driving circuit through a tungsten via, and it is understood that the positions of the source electrode and the drain electrode may be interchanged, that is, the anode may be electrically connected to the drain electrode. For example, the plurality of light emitting elements 305 share a cathode over the entire surface. For example, the light emitting color of the light emitting element may be white, but is not limited thereto.

In one exemplary embodiment, the first control electrode and the second control electrode may be made of the same material. Thus, the light transmittance of the display panel can be improved. For example, the first control electrode and the second control electrode may both be transparent electrodes. For example, the transparent electrode may be made of a transparent conductive oxide material such as Indium Tin Oxide (ITO).

In an exemplary embodiment, taking the display substrate as an OLED display substrate as an example, when the light emitting manner of the display substrate is top emission, the anode of the light emitting device layer is a reflective electrode, and the cathode is a transparent electrode, and in this case, the cathode can be used as the second control electrode. Alternatively, when the light emitting mode of the display substrate is bottom emission, the anode of the light emitting device layer is a transparent electrode, and the cathode is a reflective electrode, and in this case, the anode can be used as the second control electrode.

In an exemplary embodiment, taking the cathode as the second control electrode for example, the cathode and the first control electrode may both be transparent electrodes. For example, the cathode may be made of a transparent conductive oxide material such as Indium Tin Oxide (ITO). For example, the first control electrode may be made of a transparent conductive oxide material such as Indium Tin Oxide (ITO).

In one exemplary embodiment, as shown in fig. 7, the first control electrode may include: a plurality of block electrodes 401 arranged in an array. Therefore, the plurality of block electrodes arranged in the array correspond to the sub-pixel units arranged in the array one to one, each block electrode can be tiled to correspond to each sub-pixel, the block electrodes corresponding to different sub-pixels are mutually separated, and the individual control can be carried out through the respectively corresponding transistors). Moreover, one block electrode corresponds to one transistor, and the block electrodes corresponding to different sub-pixels can be independently controlled through the corresponding transistors. Thus, raster modulation at the pixel level can be achieved.

In an exemplary embodiment, taking the first control electrode as shown in fig. 7 as an example, then, as shown in fig. 5, the first control electrode 40 may include a plurality of block electrodes 401, and the grating control circuit layer 60 may include: a plurality of control circuits, each for driving the block electrode 401 corresponding to each sub-pixel, wherein the control circuit corresponding to each block electrode 401 may include: for clarity and simplicity, fig. 5 illustrates an example of one control transistor 601 included in the control circuit corresponding to each block electrode 401, where the control transistor 601 is used for coupling the block electrodes 401. For example, the circuit structure and layout of the regulating circuit can be designed according to actual needs, and the disclosure herein does not limit this. For example, the grating conditioning circuit layer 60 may further include: various traces such as data signal lines, etc., which are not limited in this disclosure. For example, the control transistors 601 in the control circuit may be Thin Film Transistors (TFTs) or field effect transistors (fets) or other devices with the same characteristics. For example, the thin film transistor used in the embodiment of the present disclosure may be an oxide semiconductor transistor.

In one exemplary embodiment, the first control electrode and the second control electrode may both be monolithic electrodes. Or the first control electrode is a monolithic electrode, and the second control electrode comprises a plurality of block electrodes. Alternatively, the first control electrode includes a plurality of block electrodes, and the second control electrode includes a plurality of block electrodes. Alternatively, as shown in fig. 5, the first control electrode 40 includes a plurality of block electrodes, and the second control electrode is a monolithic electrode, here, the cathode 304 is exemplified as the second control electrode in fig. 5, in this case, the transparent cathode 304 is tiled on each sub-pixel region to provide a constant voltage (e.g., zero voltage, the voltage value is not limited thereto).

In an exemplary embodiment, the encapsulation layer may cover all the sub-pixel regions, and serves to block water and oxygen and protect the light emitting element (OLED device).

In one exemplary embodiment, the encapsulation layer may include: at least one inorganic encapsulation layer and an organic encapsulation layer. The inorganic packaging layer has high compactness and can effectively prevent external water, oxygen and the like from invading; the organic packaging layer is relatively large in thickness and has certain flexibility, the surface of the display substrate can be flattened and used for buffering stress, the display substrate and the box aligning substrate are facilitated, and materials such as drying agents can be filled in the organic packaging layer to absorb intruding water, oxygen and the like so as to protect elements in the display substrate.

For example, as shown in fig. 5, the encapsulation layer 70 may include: the first encapsulation layer 701, the second encapsulation layer 702 and the third encapsulation layer 703 are sequentially stacked, the first encapsulation layer 701 and the third encapsulation layer 703 may be made of inorganic materials, the second encapsulation layer 702 may be made of organic materials, and the second encapsulation layer 702 is disposed between the first encapsulation layer 701 and the third encapsulation layer 703. For example, the first encapsulation layer 701 and the third encapsulation layer 703 may be ceramic thin film encapsulation layers; the second encapsulation layer 702 may be one or more of a polymer film encapsulation layer and a ceramic film encapsulation layer.

In one exemplary embodiment, the display substrate may further include: and the color filter layer is arranged between the light-emitting device layer and the packaging layer. For example, the color filter layer may include a red filter unit R, a green filter unit G, and a blue filter unit R, but is not limited thereto. For example, one filter unit may be divided into one sub-pixel with a corresponding light emitting element including an anode, an organic light emitting layer, and a cathode, and a pixel driving circuit corresponding to the light emitting element. For example, the red, green and blue filter cells R, G and R correspond to the red, green and blue sub-pixels, respectively. For example, the material of the color filter layer may be a material commonly used in the art.

In one exemplary embodiment, as shown in fig. 5, the first and second

substrate base plates

10 and 80 may be glass base plates.

In one exemplary embodiment, as shown in fig. 5, the first and second

substrate base plates

10 and 80 may be flexible base plates. In this way, since the first substrate and the second substrate are flexible substrates, and the grating 50 formed by the interference light irradiation of the photopolymer monomer material and the liquid crystal in the mixture layer can be bent, the display panel in the embodiment of the present disclosure can be a flexible display panel.

In addition, the display panel in the embodiment of the disclosure may include other necessary components and structures, such as spacer pillars, in addition to the display substrate, the pair of cell substrates, the light emitting device layer, the driving circuit layer, and the holographic polymer dispersed liquid crystal grating, which are not limited herein. Those skilled in the art can design and supplement the display panel accordingly according to the kind of the display panel, and the detailed description is omitted here.

As can be seen from the foregoing, in the display panel provided in the embodiments of the present disclosure, in the box formed by the display substrate and the opposing box substrate, the grating formed by the interference light irradiation due to the mixture layer located between the display substrate and the opposing box substrate is disposed. Therefore, the mixture of the polymer and the liquid crystal is packaged between the display substrate and the box aligning substrate by the box aligning packaging process, and the interference light is adopted to irradiate and manufacture the grating, so that the grating is integrally manufactured in the display panel box. Therefore, the display panel has the 2D/3D display switching function through the grating in the display panel box, and the display panel with the 2D/3D display switching function is realized, so that the grating does not need to be arranged outside the display panel, the increase of the thickness of the display panel can be avoided, the thickness of the display panel with the 2D/3D display switching function is reduced, and the manufacturing cost can be reduced.

An embodiment of the present disclosure further provides a display device, including: the display panel in one or more of the above embodiments.

In one exemplary embodiment, the display panel may be an OLED display panel.

In one exemplary embodiment, the display panel may be a flexible display panel.

For example, the display panel may be a flexible OLED display panel.

In an exemplary embodiment, the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Here, the embodiment of the present disclosure does not limit the type of the display device. Other essential components of the display device are understood by those skilled in the art, and are not described herein nor should they be construed as limiting the present disclosure.

For technical details that are not disclosed in the embodiments of the display device of the present disclosure, those skilled in the art should refer to the description of the embodiments of the display panel of the present disclosure for understanding, and therefore, the description thereof is omitted here.

Although the embodiments disclosed in the present disclosure are described above, the above description is only for the convenience of understanding the present disclosure, and is not intended to limit the present disclosure. It will be understood by those skilled in the art of the present disclosure that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that the scope of the disclosure is to be limited only by the terms of the appended claims.

Claims

1. A method for manufacturing a display panel, the display panel comprising: the display substrate that sets up to the box with to the box base plate and setting be in display substrate with to the mixture layer between the box base plate, the mixture layer includes: a photopolymer monomer material and a liquid crystal material;

the preparation method comprises the following steps: the mixture layer is irradiated with interference light to form a grating.

2. The method for preparing according to claim 1, wherein the irradiating the mixture layer with interference light to form a grating includes:

and irradiating the mixture layer with interference light to form a grating after the display substrate and the pair of cell substrates are aligned.

3. The production method according to claim 2, wherein before the irradiating the mixture layer with interference light to form a grating, the production method further comprises:

providing the display substrate and the pair of box substrates;

the display substrate and the pair of cell substrates are paired to form a polymer liquid crystal cell, and a mixture of a pre-mixed photopolymer monomer material and a liquid crystal material is injected into the polymer liquid crystal cell to form the mixture layer.

4. A display panel, comprising: a display substrate and a cell-to-cell substrate provided to a cell, and a mixture layer provided between the display substrate and the cell-to-cell substrate, wherein,

the mixture layer includes: and the grating is formed by the interference light irradiation of the photosensitive polymer monomer material and the liquid crystal in the mixture layer.

5. The display panel of claim 4, wherein the grating is a holographic grating comprising: a plurality of strip-shaped wire grids arranged in parallel.

6. The display panel according to claim 4,

the pair of cassette substrates includes: a first control electrode;

the display substrate includes: an anode and a cathode, one of which is a second control electrode; and a controllable electric field is formed between the second control electrode and the first control electrode, and the grating is controlled to be in an open state so as to switch the display panel to a three-dimensional display state, or the grating is controlled to be in a close state so as to switch the display panel to a two-dimensional display state.

7. The display panel according to claim 6,

the display substrate includes: first substrate base plate and pile up in proper order and establish first substrate base plate be close to drive circuit layer, light emitting device layer and the encapsulation layer to one side of box base plate, the light emitting device layer includes: the anode, the cathode and an organic light emitting layer between the anode and the cathode;

the pair of cassette substrates further includes: the display device comprises a second substrate base plate and a grating regulating and controlling circuit layer, wherein the grating regulating and controlling circuit layer is positioned on one side, close to the display base plate, of the second substrate base plate, and the first control electrode is positioned on one side, far away from the second substrate base plate, of the grating regulating and controlling circuit layer.

8. The display panel according to claim 6, wherein the first control electrode is located opposite to the second control electrode, and wherein the first control electrode and the second control electrode are transparent electrodes.

9. The display panel according to claim 8, wherein the light emission mode of the display substrate is top emission, and the cathode is the second control electrode; alternatively, the light emitting mode of the display substrate is bottom emission, and the anode is the second control electrode.

10. A display device, comprising: the display panel of any one of claims 4 to 9.