CN111061112A

CN111061112A - Display panel, manufacturing method thereof and display device

Info

Publication number: CN111061112A
Application number: CN202010001734.7A
Authority: CN
Inventors: 许文钦; 秦锋; 刘金娥; 孔祥建; 曾程
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-04-24
Anticipated expiration: 2040-01-02
Also published as: CN111061112B

Abstract

The invention discloses a display panel, a manufacturing method thereof and a display device. The display panel includes: a first substrate; a second substrate; display plasma located between the first substrate and the second substrate, and an isolation assembly located between the first substrate and the second substrate, the isolation assembly comprising: a plurality of first retaining walls; a plurality of second retaining walls; and the crossing part is arranged at the crossing position of the first retaining wall and the second retaining wall, wherein the average thickness of the crossing part in the direction vertical to the first substrate is lower than the thickness of the first retaining wall in the direction vertical to the first substrate and the thickness of the second retaining wall in the direction vertical to the first substrate. According to the display panel provided by the embodiment of the invention, abnormal bulges at the intersection part of the display panel in the manufacturing process can be avoided, so that the distance between the first substrate and the second substrate does not need to be adjusted, and the assembly effect of the display panel is improved.

Description

Display panel, manufacturing method thereof and display device

Technical Field

The invention relates to the field of display, in particular to a display panel, a manufacturing method thereof and a display device.

Background

With the development of electronic technology and the increase of environmental protection pressure, people desire a display medium integrating the advantages of traditional paper and modern digital display technology, and the electronic paper is produced at the same time.

An electronic paper, i.e. an electrophoretic display panel, generally includes a first substrate, a second substrate and a display plasma (or electrophoretic fluid) between the first substrate and the second substrate. The display plasma needs to be divided into a plurality of regions corresponding to the pixels by the barrier structures.

In the prior art, the thickness of the barrier structures for separating the plasma display is greatly different between the intersection position and other regions, and the thickness of the intersection position of the barrier structures is usually greater than the thickness of other barrier regions, so that the distance between the first substrate and the second substrate needs to be increased, which affects the assembly effect.

Disclosure of Invention

The invention provides a display panel, a manufacturing method thereof and a display device, which can reduce the thickness of a retaining wall cross position and improve the assembly effect of the display panel.

In a first aspect, an embodiment of the present invention provides a display panel, which includes: a first substrate including a plurality of pixel electrodes arranged in an array; a second substrate disposed opposite to the first substrate, the second substrate including a common electrode; display plasma located between the first substrate and the second substrate, and an isolation component located between the first substrate and the second substrate and dividing the display plasma into a plurality of plasma units corresponding to the plurality of pixel electrodes, respectively, the isolation component comprising: a plurality of first retaining walls, each first retaining wall extending in a first direction; each second retaining wall extends along a second direction, and the second direction is crossed with the first direction; and the crossing part is arranged at the crossing position of the first retaining wall and the second retaining wall, wherein the average thickness of the crossing part in the direction vertical to the first substrate is lower than the thickness of the first retaining wall in the direction vertical to the first substrate and the thickness of the second retaining wall in the direction vertical to the first substrate.

In a second aspect, an embodiment of the present invention provides a display device, which includes the display panel according to any one of the foregoing embodiments.

In a third aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including: providing a first substrate including a plurality of pixel electrodes arranged in an array; providing a second substrate including a common electrode; forming an isolation assembly on at least one of the first substrate or the second substrate, wherein the isolation assembly comprises a plurality of first retaining walls extending along a first direction, a plurality of second retaining walls extending along a second direction and a crossing part located at the crossing position of the first retaining walls and the second retaining walls, and the second direction crosses the first direction; forming a plasma display film on at least one of the first substrate or the second substrate; and combining the first substrate and the second substrate so that the display plasma and the isolation component are positioned between the first substrate and the second substrate, wherein the isolation component divides the display plasma into a plurality of plasma units respectively corresponding to the plurality of pixel electrodes, and the average thickness of the intersection part of the isolation component in the direction vertical to the first substrate is lower than the thickness of the first retaining wall in the direction vertical to the first substrate and the thickness of the second retaining wall in the direction vertical to the first substrate.

According to the display panel of the embodiment of the invention, the isolation assembly comprises the first retaining wall, the second retaining wall and the intersection part arranged at the intersection position of the first retaining wall and the second retaining wall. The average thickness of the cross part in the direction perpendicular to the first substrate is smaller than the thickness of the first retaining wall in the direction perpendicular to the first substrate and the thickness of the second retaining wall in the direction perpendicular to the first substrate, so that abnormal bulges of the cross part in the manufacturing process of the display panel are avoided, the distance between the first substrate and the second substrate does not need to be adjusted, and the assembling effect of the display panel is improved.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

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

FIG. 2 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 is an enlarged partial schematic view of the isolation assembly of FIG. 1 in the area Q1;

FIG. 4 is a schematic top view of an intersection of isolation assemblies in a display panel provided in accordance with an embodiment of the invention;

FIG. 5 is a cross-sectional view of an intersection of isolation assemblies in a display panel according to one embodiment of the present invention;

FIG. 6 is a schematic top view of an intersection of isolation assemblies in a display panel provided in accordance with another embodiment of the invention;

FIG. 7 is a cross-sectional view of an intersection of isolation assemblies in a display panel according to another embodiment of the present invention;

FIG. 8 is a schematic top view of an intersection of isolation assemblies in a display panel provided in accordance with yet another embodiment of the invention;

FIG. 9 is a schematic cross-sectional view of an intersection of isolation assemblies in a display panel according to yet another embodiment of the invention;

FIG. 10 is a flowchart of a method for fabricating a display panel according to an embodiment of the invention;

fig. 11 is a schematic top view of a mask according to an embodiment of the present invention;

fig. 12 is a schematic top view of an intersection unit of a mask according to an embodiment of the present invention;

FIG. 13 is a schematic top view of an intersection of isolation elements corresponding to a mask according to an embodiment of the present invention;

fig. 14 is a schematic top view of an intersection unit of a mask according to still another embodiment of the present invention;

fig. 15 is a schematic top view of an intersection of isolation elements corresponding to a mask according to still another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

Embodiments of the present invention provide a display panel for performing display using display plasma, and the following description will discuss various embodiments of the display panel in detail.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a cross-sectional view taken along direction B-B in fig. 1. The display panel 100 has a display area AA and a non-display area NA surrounding at least a portion of the periphery of the display area AA. The display panel includes a plurality of pixels PX arranged in the display area AA, the plurality of pixels PX being arranged in a plurality of rows and columns, for example, in an array, each row of pixels PX including a plurality of pixels PX arranged in the first direction X, and each column of pixels PX including a plurality of pixels PX arranged in the second direction Y.

The display panel 100 may include a gate driving circuit 101 and a data driving circuit 102 disposed in the non-display area NA. Each row of pixels PX is electrically connected to the gate driving circuit 101 through a corresponding gate line GL to receive a scanning signal of the gate driving circuit 101. Each column of pixels PX is electrically connected to the data driving circuit 102 through a corresponding data line SL to receive a data signal of the data driving circuit 102.

The display panel 100 includes a first substrate 110, a second substrate 120, a display plasma 130, and an isolation element 140. The first substrate 110 includes a plurality of pixel electrodes 111 arranged in an array. The second substrate 120 is disposed opposite to the first substrate 110, and the second substrate 120 includes a common electrode 121. The plasma 130 is shown between the first substrate 110 and the second substrate 120. The isolation member 140 is disposed between the first substrate 110 and the second substrate 120, and separates the display plasma 130 into a plurality of plasma units PU corresponding to the plurality of pixel electrodes 111, respectively.

One pixel electrode 111 is provided for each pixel PX. The size of the pixel electrode 111 can be adjusted according to the design requirements of the display panel 100. In some embodiments, the edge of the pixel electrode 111 may overlap with the orthogonal projection of the isolation element 140 on the plane of the pixel electrode 111, so that the plasma unit PU can also be subjected to the action of the electric field with a larger intensity in the edge area close to the isolation element 140, thereby avoiding the problem of poor display caused by the smaller electric field intensity at the edge of the plasma unit PU.

In some embodiments, the first substrate 110 includes a first substrate 112 and a device layer 113 located on a side of the first substrate 112 facing the second substrate 120, and a thin film transistor T1 is formed in the device layer 113. One thin film transistor T1 is provided for each pixel PX. Taking the thin film transistor T1 as an example of a bottom gate structure, the thin film transistor T1 includes a gate electrode on the first substrate 112, a gate insulating layer on the gate electrode, a semiconductor layer on the gate insulating layer, and a source electrode and a drain electrode in contact with the semiconductor layer on both sides of the gate electrode, respectively.

For each pixel PX, one of a source and a drain of the thin-film transistor T1 is connected to the pixel electrode 111, the other is connected to the data line SL, and a gate of the thin-film transistor T1 is connected to the gate line GL.

The second substrate 120 includes a second substrate 122, and the common electrode 121 is disposed on a side of the second substrate 122 facing the first substrate 110.

The first substrate 110 and the second substrate 120 are disposed opposite to each other and connected to each other by a connection member 150. Wherein the connecting member 150 is disposed around the periphery of the display area AA. The connecting member 150 may be made of sealant or other non-transparent adhesive layer.

The first substrate 112 and the second substrate 122 may be transparent substrates, and are made of glass or Polyimide (PI), for example. The pixel electrode 111 and the common electrode 121 are both transparent electrodes, and are formed of a transparent conductive material such as Indium Tin Oxide (ITO).

As used herein, display plasma refers to a slurry containing electrically conductive particles for display. The display plasma 130 includes at least two types of electrophoretic particles with photoelectric properties, and the colors of the electrophoretic particles include, but are not limited to, white, black, red, green, blue, yellow, and so on, so as to correspondingly realize display modes such as black-and-white display, single-color display, dual-color display, multi-color display, true-color display, and so on. The display plasma 130 may include a fluorescent material, such as an inorganic fluorescent material, such as a rare earth fluorescent material or a metal sulfide, or an organic fluorescent material, such as a small molecule fluorescent material or a polymer fluorescent material.

Taking the example of the display plasma 130 containing white particles and black particles as an example, the white particles and the black particles have different electrical properties. The different electrical property can be that the white particles and the black particles have different polarities, such as positive polarity and negative polarity, respectively; the white particles and the black particles may have the same polarity, but the white particles and the black particles have different sensitivity to the electric field, and the white particles and the black particles move according to the magnitude and direction of the electric field under the condition of changing the electric field strength, so as to realize display. Therefore, when the electric field applied between the pixel electrode 111 and the common electrode 121 is changed, the white particles and the black particles move under the action of the electric field, so that the corresponding pixel PX appears white or black on the display surface, and black and white display of the display panel 100 is realized.

In other embodiments, color display can be achieved in a manner similar to black and white display described above by disposing colored electrophoretic particles in the display plasma 130. In addition, the display panel 100 according to the embodiment of the present invention may implement color display in other ways. For example, in some embodiments, the second substrate 120 further includes a plurality of color filter units corresponding to the plurality of pixel electrodes 111, respectively. The plurality of color filter units include, for example, a red filter unit, a green filter unit, and a blue filter unit. The display plasma 130 is configured with white particles and black particles, wherein the white particles can reflect the ambient light and display the corresponding color when passing through the color filter unit.

In some embodiments, the isolation component 140 is made of a thermosetting material, such as a polymer resin material, such as acrylic resin.

Fig. 3 is an enlarged partial schematic view of the isolation assembly of fig. 1 in the area Q1. The isolation assembly 140 includes a plurality of first walls 141, a plurality of second walls 142, and an intersection 143. Wherein each first retaining wall 141 extends along the first direction X. Each of the second retaining walls 142 extends along a second direction Y, which intersects the first direction X. The crossing portion 143 is disposed at a crossing position of the first retaining wall 141 and the second retaining wall 142. In some embodiments, the first direction X is a row direction in which the plurality of pixels PX are arranged, and the second direction Y is a column direction in which the plurality of pixels PX are arranged. The first direction X and the second direction Y may be perpendicular to each other. The first direction X and the second direction Y are not limited to the above examples, and may be other extending directions intersecting each other.

In this embodiment, the extending direction of the first wall 141 is the same as the extending direction of the gate line GL, and the extending direction of the second wall 142 is the same as the extending direction of the data line SL. In some embodiments, an orthographic projection of each gate line GL on the first substrate 112 overlaps with an orthographic projection of a corresponding one of the first retaining walls 141 on the first substrate 112; the orthographic projection of each data line SL on the first substrate 112 overlaps the orthographic projection of a corresponding second barrier 142 on the first substrate 112, so that the occupied areas of the gate line GL, the data line SL and the isolation element 140 on a plane parallel to the first substrate 112 are reduced, and the aperture ratio of the display panel 100 can be improved.

Fig. 4 and 5 are schematic top view and schematic cross-sectional view of an intersection of isolation assemblies in a display panel according to an embodiment of the invention. Fig. 4 may correspond to an enlarged partial view of the area Q2 in fig. 3, the line C-C in fig. 4 being taken from the sectional view of fig. 5.

In this embodiment, the average thickness of the crossing portion 143 in the direction perpendicular to the first substrate 110 is less than the thickness of the first retaining wall 141 in the direction perpendicular to the first substrate 110 and the thickness of the second retaining wall 142 in the direction perpendicular to the first substrate 110, so as to prevent the crossing portion 143 from generating an abnormal protrusion during the manufacturing process of the display panel 100, and thus, the distance between the first substrate 110 and the second substrate 120 does not need to be adjusted, and the assembling effect of the display panel 100 is improved. In the manufacturing process of the display panel 100, the intersection 143 generates an abnormal protrusion, for example, when the forming material of the isolation element 140 is baked, the collapse degree of the first and

second retaining walls

141 and 142 is greater than that of the intersection 143. Because if the material density of the retaining wall is higher at the position where the solid body is crossed, the retaining wall is less prone to collapse during baking, and the crossed position is higher than the non-crossed position.

As shown in fig. 4 and 5, in the present embodiment, the intersection 143 includes a through hole TH extending in the thickness direction. In some embodiments, the shape of a cross section perpendicular to the thickness direction of the through hole TH is a centrosymmetric pattern. For example, the shape of the cross section of the through hole TH perpendicular to the thickness direction is a regular polygon, a circle, an ellipse, a rhombus, a polygonal star, or the like.

In the embodiment, the width of the through hole TH in the direction perpendicular to the first wall 141 is smaller than or equal to the width of the first wall 141, and when the first direction X is perpendicular to the second direction Y, the dimension of the through hole TH in the second direction Y (and parallel to the first substrate 112) is smaller than or equal to the dimension of the first wall 141 in the second direction Y (and parallel to the first substrate 112). The width of the through hole TH in the direction perpendicular to the second blocking wall 142 is less than or equal to the width of the second blocking wall 142, and when the first direction X is perpendicular to the second direction Y, that is, the dimension of the through hole TH in the first direction X (and parallel to the first substrate 112) is less than or equal to the dimension of the second blocking wall 142 in the first direction X (and parallel to the first substrate 112).

By providing the through holes TH at the intersections 143, the average thickness of the intersections 143 in the direction perpendicular to the first substrate 110 can be made lower than the thickness of the first retaining walls 141 in the direction perpendicular to the first substrate 110 and the thickness of the second retaining walls 142 in the direction perpendicular to the first substrate 110, thereby preventing the intersections 143 from generating abnormal protrusions during the manufacturing process of the display panel 100.

By reasonably selecting the shape of the through hole TH and limiting the width of the through hole TH to be less than or equal to the width of the first retaining wall 141 and the width of the second retaining wall 142, the adjacent plasma units PU can be prevented from leaking each other through the crossing portion 143, and the sealing capability of the isolation component 140 is improved.

Fig. 6 and 7 are a schematic top view and a schematic cross-sectional view of an intersection of isolation assemblies in a display panel according to another embodiment of the invention, where line D-D in fig. 6 is a cut-away portion of the schematic cross-sectional view in fig. 7. Fig. 6 and 7 show a display panel according to an embodiment, which is similar to the display panel according to the previous embodiment, and the differences between the display panel and the display panel will be described below, and the similarities will not be described in detail.

Unlike the previous embodiment, the intersection 143 includes a concave structure RS extending in the thickness direction. In some embodiments, the intersection 143 has opposing first and second surfaces, wherein the first surface is connected with the first substrate 110 and the concave structure RS is concavely formed from the second surface of the intersection 143 toward the first surface.

In some embodiments, the shape of a cross section of the concave structure RS perpendicular to the thickness direction (i.e., the shape of a cross section in a plane parallel to the first substrate 112) is a center-symmetrical pattern. For example, the shape of a cross section perpendicular to the thickness direction of the concave structure RS is a regular polygon, a circle, an ellipse, a rhombus, or a polygonal star.

In this embodiment, the width of the recessed structure RS in the direction perpendicular to the first wall 141 is smaller than or equal to the width of the first wall 141, and when the first direction X is perpendicular to the second direction Y, the dimension of the recessed structure RS in the second direction Y (and parallel to the first substrate 112) is smaller than or equal to the dimension of the first wall 141 in the second direction Y (and parallel to the first substrate 112). The width of the recessed structure RS in the direction perpendicular to the second blocking wall 142 is less than or equal to the width of the second blocking wall 142, and when the first direction X is perpendicular to the second direction Y, the dimension of the recessed structure RS in the first direction X (and parallel to the first substrate 112) is less than or equal to the dimension of the second blocking wall 142 in the first direction X (and parallel to the first substrate 112).

By providing the concave structure RS at the intersection 143, the average thickness of the intersection 143 in the direction perpendicular to the first substrate 110 can be made lower than the thickness of the first retaining wall 141 in the direction perpendicular to the first substrate 110 and the thickness of the second retaining wall 142 in the direction perpendicular to the first substrate 110, thereby preventing the display panel 100 from generating an abnormal protrusion at the intersection 143 during the manufacturing process.

By reasonably selecting the shape of the concave structure RS and limiting the width of the concave structure RS to be less than or equal to the width of the first retaining wall 141 and the width of the second retaining wall, the adjacent plasma units PU can be prevented from leaking through the intersection part 143, and the slurry sealing capability of the isolation component 140 is improved.

Fig. 8 and 9 are a schematic top view and a schematic cross-sectional view of an intersection of isolation elements in a display panel according to yet another embodiment of the invention, where line E-E in fig. 8 is taken along the schematic cross-sectional view in fig. 9. Fig. 8 and 9 show a display panel according to an embodiment, which is similar to the display panel according to the previous embodiment, and the differences between the display panel and the display panel will be described below, and the similarities will not be described in detail.

As shown in fig. 8 and 9, in the present embodiment, the cross portion 143 has a hollow pillar structure including a through hole TH extending in the thickness direction. The cross portion 143 adopting the hollow pillar structure can ensure that the average thickness of the cross portion 143 in the direction perpendicular to the first substrate 110 is lower than the thicknesses of the first retaining wall 141 and the second retaining wall 142, and simultaneously avoid the problem of slurry sealing capability reduction caused by the excessively thin wall thickness of the cross portion 143 in the direction parallel to the first substrate 110.

In some embodiments, the width of the first retaining wall 141 (in the second direction Y) is 5 to 8 micrometers, and the width of the through hole TH in a direction perpendicular to the first retaining wall 141 is 4 to 8 micrometers. In some embodiments, the width of the second blocking wall 142 (in the first direction X) is 5 to 8 micrometers, and the width of the through hole TH in a direction perpendicular to the second blocking wall 142 is 4 to 8 micrometers.

In some embodiments, the space between the outer wall S1 and the inner wall S2 of the hollow pillar structure is 3 microns to 5 microns, so as to ensure that the intersection portion 143 has a sufficient wall thickness in a direction parallel to the first substrate 110, thereby improving the sealing effect of the isolation assembly 140.

Embodiments of the present invention further provide a method for manufacturing a display panel, and embodiments of the method for manufacturing a display panel will be described below.

Fig. 10 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention, where the method includes steps S110 to S150.

In step S110, a first substrate including a plurality of pixel electrodes arranged in an array is provided.

In step S120, a second substrate including a common electrode is provided.

The order of steps S110 and S120 is not limited, and the step of providing the first substrate and the step of providing the second substrate may be performed first, and the step of providing the first substrate may be performed second, or the step of providing the first substrate and the step of providing the second substrate may be performed simultaneously.

In step S130, an isolation element is formed on at least one of the first substrate or the second substrate, including forming a plurality of first retaining walls extending along a first direction, forming a plurality of second retaining walls extending along a second direction, and forming an intersection at a crossing position of the first retaining walls and the second retaining walls, wherein the second direction crosses the first direction.

In this embodiment, an example in which an isolation device is formed on a surface of a first substrate facing a second substrate will be described. The spacer member may be made of a thermosetting material, for example, a polymer resin material such as acrylic resin.

In some embodiments, the average thickness of the crossing portion of the isolation element in the direction perpendicular to the first substrate is less than the thickness of the first retaining wall in the direction perpendicular to the first substrate and the thickness of the second retaining wall in the direction perpendicular to the first substrate, so as to prevent the crossing portion from generating abnormal protrusions (e.g. abnormal protrusions formed in the baking process of the isolation element) during the manufacturing process of the display panel, and improve the assembling effect between the subsequent first substrate and the second substrate.

In some embodiments, the step S130 of forming the isolation element on at least one of the first substrate or the second substrate comprises forming the patterned isolation element through a mask. Specifically, a layer to be patterned, which is, for example, an acrylic resin layer, may be formed on a surface of the first substrate facing the second substrate. And patterning the layer to be patterned through a mask plate to obtain the isolation assembly.

In the patterning process, the mask may be a positive mask layer or a negative mask layer, and the patterning process will be described below by taking the mask as the positive mask layer. It will be appreciated that the same shape of the isolation element may also be patterned using a negative photolithographic mask layer that is complementary to the mask pattern of the positive photolithographic mask layer.

Fig. 11 is a schematic top view of a mask according to an embodiment of the present invention. The mask plate 200 includes a plurality of first extension units 210 respectively extending along the first direction X, a plurality of second extension units 220 respectively extending along the second direction Y, and a crossing unit 230 located at a crossing position of the first extension units 210 and the second extension units 220. The first direction X and the second direction Y are mutually intersecting, and in some embodiments, the first direction X and the second direction Y are mutually perpendicular.

By patterning the layer to be patterned through the mask plate 200, the isolation assembly with a matched shape can be formed. The shape of the first extension unit 210 of the mask 200 substantially corresponds to the shape of the first wall of the isolation device, the shape of the second extension unit 220 of the mask 200 substantially corresponds to the shape of the second wall of the isolation device, and the shape of the intersection unit 230 of the mask 200 substantially corresponds to the shape of the intersection of the isolation device.

Fig. 12 is a schematic top view of an intersection unit of a mask according to an embodiment of the present invention, and fig. 13 is a schematic top view of an intersection portion of an isolation element corresponding to the mask according to the embodiment of the present invention.

In this embodiment, the intersection unit 230 of the mask 200 is provided with a hollow area HA, and the shape of a cross section of the hollow area HA perpendicular to the thickness direction of the mask 200 is a centrosymmetric pattern. The shape of the cross section of the hollow area HA perpendicular to the thickness direction of the mask plate 200 is regular polygon, circle, ellipse, diamond, or polygonal star, etc.

The step of forming the patterned isolation component may be: an organic layer to be patterned is first formed, the organic layer being formed of a material for forming the barrier member, such as an acrylic resin. The organic layer has the performance similar to that of a photoresist and can be a positive photoetching material or a negative photoetching material. In the examples, the organic layer is a positive resist. After exposure is performed on the organic layer by using the mask plate 200 as a photomask, the region complementary to the pattern of the mask plate 200 is softened, so that the organic layer in the region complementary to the pattern of the mask plate 200 is removed after development, and the organic layer pattern substantially identical to the pattern of the mask plate 200 is left. And baking and curing the organic layer pattern to obtain the isolation assembly. Therefore, the shape of each member of the isolation member formed substantially corresponds to the pattern shape of the mask plate 200.

When the pattern of the mask 200 includes sharp corners, the sharp corner regions are usually not completely restored during the exposure process, so that the organic layer pattern obtained after the development forms rounded regions, such as circular arc, at the positions corresponding to the sharp corner regions of the mask 200, so that the shape of the isolation elements formed is slightly different from the pattern shape of the mask 200 at the sharp corner regions.

For example, in the present embodiment, the cross-section of the hollow area HA perpendicular to the thickness direction of the mask 200 is shaped as a four-pointed star, which is a central symmetrical pattern. As shown in fig. 13, in the isolation element 140 corresponding to the mask 200, the through holes TH corresponding to the hollow areas HA are formed at the intersections 143 of the isolation element 140, and the cross-section of the through holes TH perpendicular to the thickness direction of the isolation element 140 HAs a shape of a four-pointed star with rounded lines.

Fig. 14 is a schematic top view of an intersection unit of a mask according to still another embodiment of the present invention, and fig. 15 is a schematic top view of an intersection portion of an isolation element corresponding to the mask according to still another embodiment of the present invention.

In the present embodiment, a cross-section of the crossing unit 230 perpendicular to the thickness direction of the mask plate 200 is a ring-shaped structure. The width of the outer contour of the ring-shaped structure in the direction perpendicular to the first extension unit 210 (i.e., the width in the second direction Y) is greater than or equal to the width of the first extension unit 210, and the width of the outer contour of the ring-shaped structure in the direction perpendicular to the second extension unit 220 (i.e., the width in the first direction X) is greater than or equal to the width of the second extension unit 220.

The ring structure may be a polygonal ring structure, a circular ring structure, or an elliptical ring structure. For example, in the present embodiment, the ring structure is a square ring structure, and the inside of the ring structure has a hollow area. As shown in fig. 15, in the isolation member 140 corresponding to the mask 200, the intersection 143 of the isolation member 140 has a hollow pillar structure substantially corresponding to the ring-shaped structure, and a cross section of the hollow pillar structure perpendicular to the thickness direction of the isolation member 140 has a substantially rounded square shape and has a through hole therein substantially corresponding to the hollow area.

While the above are examples of the mask 200 and the corresponding isolation elements 140, in other embodiments, various patterns of masks can be selected according to the design requirements of the display panel to obtain the corresponding isolation elements 140 with reasonable shapes.

With reference to fig. 10, in step S140, a plasma display film is formed on at least one of the first substrate or the second substrate. For example, in the present embodiment, a plasma display film is formed on the surface of the first substrate facing the second substrate by coating.

In step S150, the first substrate and the second substrate are combined such that the display plasma and the isolation member are located between the first substrate and the second substrate, wherein the isolation member separates the display plasma into a plurality of plasma units respectively corresponding to the plurality of pixel electrodes. When the first substrate and the second substrate are combined, the first substrate and the second substrate can be connected by adopting a connecting piece surrounding the periphery of the display area, and the connecting piece can be made of a non-light-transmitting glue layer.

According to the manufacturing method of the display panel, the isolation assembly comprises the first retaining wall, the second retaining wall and the intersection part arranged at the intersection position of the first retaining wall and the second retaining wall. The average thickness of the cross part in the direction perpendicular to the first substrate is smaller than the thickness of the first retaining wall in the direction perpendicular to the first substrate and the thickness of the second retaining wall in the direction perpendicular to the first substrate, so that abnormal bulges of the cross part in the manufacturing process of the display panel are avoided, the assembling distance between the first substrate and the second substrate does not need to be adjusted, and the assembling effect of the display panel is improved.

The embodiment of the invention also provides a display device which can comprise the display panel of any one of the embodiments. The display device may be an electronic book or a terminal device such as a mobile phone. The display panel of the display device comprises a first substrate, a second substrate and display plasma, wherein the first substrate and the second substrate are oppositely arranged, and the display plasma is clamped between the first substrate and the second substrate. The first substrate includes a plurality of pixel electrodes arranged in an array. The second substrate includes a common electrode.

The display panel of the display device also comprises an isolation component, wherein the isolation component is positioned between the first substrate and the second substrate and divides display plasma into a plurality of plasma units respectively corresponding to the pixel electrodes, and the plasma units correspond to the pixels of the display panel one by one.

The isolation assembly comprises a plurality of first retaining walls, a plurality of second retaining walls and a cross portion. Wherein each first retaining wall extends along a first direction. Each second retaining wall extends along a second direction, and the second direction is crossed with the first direction. The crossing part is arranged at the crossing position of the first retaining wall and the second retaining wall. The average thickness of the cross part in the direction perpendicular to the first substrate is smaller than the thickness of the first retaining wall in the direction perpendicular to the first substrate and the thickness of the second retaining wall in the direction perpendicular to the first substrate, so that abnormal bulges of the cross part in the manufacturing process of the display panel are avoided, the assembling distance between the first substrate and the second substrate does not need to be adjusted, and the assembling effect of the display panel is improved.

According to the display device of the embodiment of the invention, the display panel utilizes the display plasma to display, the required driving voltage is lower (about +/-8V), so that the corresponding speed is higher, and the display can be kept for a long time. In addition, compared with the traditional electrophoretic display device, the electrophoretic particles in the display plasma have smaller particle size, so that the contrast is higher.

In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, comprising:

a first substrate including a plurality of pixel electrodes arranged in an array;

a second substrate disposed opposite to the first substrate, the second substrate including a common electrode;

a display plasma between the first substrate and the second substrate, an

An isolation assembly positioned between the first substrate and the second substrate and separating the display plasma into a plurality of plasma cells corresponding to the plurality of pixel electrodes, respectively, the isolation assembly comprising:

a plurality of first retaining walls, each of the first retaining walls extending in a first direction;

a plurality of second retaining walls, each of the second retaining walls extending in a second direction, the second direction intersecting the first direction; and

a crossing part arranged at the crossing position of the first retaining wall and the second retaining wall,

wherein an average thickness of the crossing portion in a direction perpendicular to the first base is lower than a thickness of the first retaining wall in a direction perpendicular to the first base and a thickness of the second retaining wall in a direction perpendicular to the first base.

2. The display panel according to claim 1, wherein the intersection portion includes a through hole or a concave structure extending in a thickness direction.

3. The display panel according to claim 2, wherein a shape of a cross section of the through hole perpendicular to the thickness direction is a centrosymmetric pattern; or

The shape of the cross section of the concave structure perpendicular to the thickness direction is a centrosymmetric figure.

4. The display panel according to claim 2, wherein a shape of a cross section of the through hole perpendicular to the thickness direction is a regular polygon, a circle, an ellipse, a diamond, or a polygonal star; or

The shape of the cross section of the concave structure perpendicular to the thickness direction is a regular polygon, a circle, an ellipse, a diamond or a polygonal star.

5. The display panel according to claim 2, wherein the width of the through hole or the recessed structure in the direction perpendicular to the first retaining wall is less than or equal to the width of the first retaining wall;

the width of the through hole or the concave structure in the direction perpendicular to the second retaining wall is less than or equal to the width of the second retaining wall.

6. The display panel according to claim 1, wherein the cross portion has a hollow pillar structure including a through hole extending in a thickness direction.

7. The display panel according to claim 6, wherein the width of the first wall is 5 to 8 μm, and the width of the through hole in the direction perpendicular to the first wall is 4 to 8 μm;

the width of second barricade is 5 microns to 8 microns, the through-hole is perpendicular to the width of second barricade is 4 microns to 8 microns.

8. The display panel according to claim 6, wherein the outer wall and the inner wall of the hollow pillar structure have a distance of 3 to 5 μm.

9. The display panel of claim 1, wherein the barrier component is made of a thermosetting material.

10. The display panel according to claim 1, wherein the second substrate further comprises a plurality of color filter units corresponding to the plurality of pixel electrodes, respectively.

11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.

12. A method for manufacturing a display panel is characterized by comprising the following steps:

providing a first substrate including a plurality of pixel electrodes arranged in an array;

providing a second substrate including a common electrode;

forming an isolation assembly on at least one of the first substrate or the second substrate, including forming a plurality of first retaining walls extending along a first direction, respectively, forming a plurality of second retaining walls extending along a second direction, respectively, and forming a crossing portion located at a crossing position of the first retaining walls and the second retaining walls, wherein the second direction crosses the first direction;

forming a plasma display film on at least one of the first substrate or the second substrate; and

combining the first substrate and the second substrate such that the display plasma and the isolation member are located between the first substrate and the second substrate, wherein the isolation member separates the display plasma into a plurality of plasma cells respectively corresponding to the plurality of pixel electrodes,

wherein an average thickness of the crossing portion of the barrier assembly in a direction perpendicular to the first base plate is lower than a thickness of the first retaining wall in a direction perpendicular to the first base plate and a thickness of the second retaining wall in a direction perpendicular to the first base plate.

13. The method of claim 12, wherein the forming isolation elements on at least one of the first substrate or the second substrate comprises forming the isolation elements patterned through a mask.

14. The method for manufacturing the display panel according to claim 13, wherein the mask includes a plurality of first extension units respectively extending along the first direction, a plurality of second extension units respectively extending along the second direction, and an intersection unit located at an intersection position of the first extension unit and the second extension unit.

15. The method according to claim 14, wherein the intersecting units of the mask are provided with hollow areas, and a cross section of each hollow area perpendicular to a thickness direction of the mask is in a shape of a centrosymmetric pattern.

16. The method of claim 15, wherein a cross-section of the hollow area perpendicular to a thickness direction of the mask is in a shape of a regular polygon, a circle, an ellipse, a diamond, or a polygon star.

17. The method according to claim 14, wherein a cross section of the intersection unit perpendicular to a thickness direction of the mask is a ring-shaped structure, a width of an outer contour of the ring-shaped structure in a direction perpendicular to the first extension unit is greater than or equal to a width of the first extension unit, and a width of the outer contour of the ring-shaped structure in a direction perpendicular to the second extension unit is greater than or equal to a width of the second extension unit.

18. The method of claim 17, wherein the ring structure is a polygonal ring structure, a circular ring structure, or an elliptical ring structure.