CN113534541A - Curved surface display panel - Google Patents

Curved surface display panel Download PDF

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Publication number
CN113534541A
CN113534541A CN202010317904.2A CN202010317904A CN113534541A CN 113534541 A CN113534541 A CN 113534541A CN 202010317904 A CN202010317904 A CN 202010317904A CN 113534541 A CN113534541 A CN 113534541A
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CN
China
Prior art keywords
area
region
spacers
substrate
display panel
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Pending
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CN202010317904.2A
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Chinese (zh)
Inventor
陈谚宗
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Hannstar Display Corp
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Hannstar Display Corp
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Priority to CN202010317904.2A priority Critical patent/CN113534541A/en
Publication of CN113534541A publication Critical patent/CN113534541A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks

Abstract

The invention provides a curved surface display panel which comprises a first substrate, a second substrate, a plurality of first spacers, a plurality of second spacers, a display medium layer and frame glue. The second substrate includes a first surface facing the first substrate and a second surface remote from the first substrate. The first spacers and the second spacers are arranged between the first substrate and the second substrate. The first spacers and the second spacers extend from the first surface toward the direction facing the first substrate, and the heights of the second spacers are smaller than the heights of the first spacers. The display medium layer is arranged between the first substrate and the second substrate. The curved display panel comprises a first area and a second area, wherein the density of the first spacers in the first area is greater than that of the first spacers in the second area. The first region is a corner region, and the second region is a central region.

Description

Curved surface display panel
Technical Field
The present invention relates to a display panel, and more particularly, to a curved display panel.
Background
Curved display panels are used more and more widely nowadays, and are widely used in wearable micro devices, mobile phones, televisions or other electronic devices. The curved display panel may include a convex curved display panel and a concave curved display panel, wherein the display surface of the convex curved display panel is convex toward a direction of a user, and the display surface of the concave curved display panel is convex toward a direction away from the user.
However, in the conventional curved display panel, for example, in the process of attaching to the cover plate or the process of assembling to the backlight module, the curved display panel generates an excessive stress during the above process, so that the liquid crystal is squeezed and pushed to the periphery of the curved display panel (for example, four corners and/or left and right sides of the curved display panel), which makes the liquid crystal amount distribution more uneven farther away from the center of the curved display panel, and the above situation generates abnormal liquid crystal layer gaps and stripe phenomena, thereby causing the display quality of the curved display panel to be poor.
Disclosure of Invention
The present invention is directed to a curved display panel, which can prevent the occurrence of a local abnormal gap and stripe phenomenon in a liquid crystal layer at the periphery thereof, thereby improving display quality.
According to an embodiment of the invention, the curved display panel comprises a first substrate, a second substrate, a plurality of first spacers, a plurality of second spacers, a display medium layer and a sealant. The second substrate includes a first surface facing the first substrate and a second surface remote from the first substrate. The first spacers and the second spacers are arranged between the first substrate and the second substrate. The first spacers and the second spacers extend from the first surface toward the direction facing the first substrate, and the heights of the second spacers are smaller than the heights of the first spacers. The display medium layer is arranged between the first substrate and the second substrate. The curved display panel comprises a first area and a second area, wherein the density of the first spacers in the first area is greater than that of the first spacers in the second area. The first region is a corner region, and the second region is a central region.
In the curved display panel according to the embodiment of the invention, the curved display panel further includes a third area and a fourth area defined by the first area and the second area, wherein the density of the plurality of first spacers in the first area is greater than the density of the plurality of first spacers in the third area and the fourth area. The third region is a long side region and the fourth region is a short side region.
In the curved display panel according to the embodiment of the invention, the curved display panel further includes a third area and a fourth area defined by the first area and the second area, wherein the density of the plurality of first spacers in the first area is greater than the density of the plurality of first spacers in the third area, and the density of the plurality of first spacers in the first area is the same as the density of the plurality of first spacers in the fourth area. The third region is a long side region and the fourth region is a short side region.
In the curved display panel according to the embodiment of the invention, the second substrate includes a plurality of groups of color filters, wherein at least one first spacer is correspondingly arranged on each group of color filters, and the number of the color filters with different colors in each group of color filters is the same.
In the curved display panel according to the embodiment of the invention, the average number of the at least one first spacer disposed corresponding to the group of color filters in the first region is greater than the average number of the at least one first spacer disposed corresponding to the group of color filters in the second region.
In the curved display panel according to the embodiment of the invention, the curved display panel further includes a third area and a fourth area defined by the first area and the second area, wherein an average number of the at least one first spacer disposed in the first area corresponding to the group of color filters is greater than an average number of the at least one first spacer disposed in the third area and the fourth area corresponding to the group of color filters. The third region is a long side region and the fourth region is a short side region.
In the curved display panel according to the embodiment of the invention, the curved display panel further includes a third area and a fourth area defined by the first area and the second area, wherein an average number of the at least one first spacer disposed in the fourth area corresponding to the group of color filters is greater than an average number of the at least one first spacer disposed in the second area and the third area corresponding to the group of color filters. The third region is a long side region and the fourth region is a short side region.
In the curved display panel according to the embodiment of the invention, the height of the plurality of second spacers is 0.14-0.978 times that of the plurality of first spacers.
In the curved display panel according to the embodiment of the invention, the height of the plurality of first spacers is 1.2 to 4.5 μm, and the height of the plurality of second spacers is 0.1 to 4.4 μm.
According to an embodiment of the invention, the curved display panel comprises a first substrate, a second substrate, a plurality of first spacers, a plurality of second spacers, a display medium layer and a sealant. The second substrate includes a first surface facing the first substrate and a second surface remote from the first substrate. The first spacers and the second spacers are arranged between the first substrate and the second substrate. The first spacers and the second spacers extend from the first surface toward the direction facing the first substrate, and the heights of the second spacers are smaller than the heights of the first spacers. The display medium layer is arranged between the first substrate and the second substrate. A plurality of first spacers are in contact with the first substrate. The curved display panel with the substrate spacers comprises a first area and a second area, wherein the total contact area of the first spacers and the first substrate in the first area is larger than the total contact area of the first spacers and the first substrate in the second area. The first region is a corner region, and the second region is a central region.
In the curved display panel according to the embodiment of the invention, the curved display panel further includes a third region and a fourth region defined by the first region and the second region, wherein a total area of the plurality of first spacers in contact with the first substrate in the first region is larger than a total area of the plurality of first spacers in contact with the first substrate in the third region and the fourth region. The third region is a long side region and the fourth region is a short side region.
In the curved display panel according to the embodiment of the invention, the curved display panel further includes a third region and a fourth region defined by the first region and the second region, wherein a total area of the plurality of first spacers in contact with the first substrate in the fourth region is larger than a total area of the plurality of first spacers in contact with the first substrate in the second region and the third region. The third region is a long side region and the fourth region is a short side region.
Based on the above, the curved display panel according to an embodiment of the present invention includes the first spacers having a density, a number, or an area contacting the first substrate in the first region that is greater than a density, an average number, or a total area contacting the first spacers in the second region, so that in a process of attaching or assembling the curved display panel to other members, a local abnormal liquid crystal layer gap in the curved display panel can be avoided. In addition, the speckle phenomenon of the curved surface display panel can be reduced, so that the display quality of the curved surface display panel is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a schematic top view of a curved display panel according to an embodiment of the present invention;
FIG. 2A is a schematic top view of the distribution of first spacers on various areas of the curved display panel of FIG. 1 according to one embodiment;
FIG. 2B is a schematic top view illustrating the distribution of first spacers on each area of the curved display panel of FIG. 1 according to another embodiment;
FIG. 2C is a schematic top view illustrating the distribution of first spacers on each area of the curved display panel of FIG. 1 according to yet another embodiment;
FIG. 3A is a schematic cross-sectional view of the distribution of first spacers over a first area according to one embodiment of section line A-A' of FIG. 1;
FIG. 3B is a schematic cross-sectional view of the distribution of the first spacers over the first area according to another embodiment of the cross-section line A-A' of FIG. 1;
FIG. 3C is a schematic cross-sectional view of the distribution of the first spacers over the first area according to yet another embodiment of the cross-section line A-A' of FIG. 1.
Detailed Description
Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. The present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The thickness of layers and regions in the drawings may be exaggerated for clarity. The same or similar reference numbers refer to the same or similar components, and the following paragraphs will not be repeated. In addition, directional terms mentioned in the embodiments, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.
Fig. 1 is a schematic top view of a curved display panel according to an embodiment of the invention. Fig. 2A is a schematic top view illustrating distribution of first spacers on each area in the curved display panel of fig. 1 according to an embodiment. Fig. 2B is a schematic top view illustrating distribution of first spacers on each area according to another embodiment of the curved display panel of fig. 1. Fig. 2C is a schematic top view illustrating distribution of first spacers on each area according to another embodiment of the curved display panel of fig. 1. FIG. 3A is a schematic cross-sectional view of the distribution of the first spacers over the first area according to one embodiment of the cross-section line A-A' of FIG. 1. FIG. 3B is a schematic cross-sectional view of the distribution of the first spacers over the first area according to another embodiment of the cross-section line A-A' of FIG. 1. FIG. 3C is a schematic cross-sectional view of the distribution of the first spacers over the first area according to yet another embodiment of the cross-section line A-A' of FIG. 1.
Referring to fig. 1, fig. 2A and fig. 3A, the curved display panel 10 of the present embodiment includes a first substrate 100, a second substrate 200, a plurality of first spacers SOC1, a plurality of second spacers SOC2, a display medium layer 110 and a sealant 120. The first substrate 100 and the second substrate 200 are bonded to each other by, for example, the sealant 120. From another perspective, the curved display panel 10 of the present embodiment includes a display area AR and a non-display area NR. The non-display area NR is, for example, located on at least one side of the display area AR. In the embodiment, the non-display area NR surrounds the display area AR, but the invention is not limited thereto. The curved display panel 10 of the present embodiment is a curved display panel that is curved in the z-axis direction, for example. For example, as shown in fig. 1, the curved display panel 10 is a concave curved display panel having a display surface protruding in a direction away from the user, but the invention is not limited thereto. In other embodiments, the curved display panel 10 may be a convex curved display panel having a display surface that is convex in a direction toward the user. In the present embodiment, the display area AR of the rectangular curved display panel 10 has a long side L extending along the x-axis direction and a short side S extending along the y-axis direction, and the x-axis is perpendicular to the y-axis. In the present embodiment, the long side L is a side of the curved display panel 10 with curvature, but it should be noted that the invention is not limited thereto. In other embodiments, the curved display panel 10 has short sides extending along the x-axis direction and curved, and long sides extending along the y-axis direction.
Referring to fig. 1 and fig. 3A, the first substrate 100 includes a surface 101 facing the second substrate 200 and a surface 102 away from the second substrate 200, and the second substrate 200 also includes a surface 201 facing the first substrate 100 and a surface 202 away from the first substrate 100. In the present embodiment, the first substrate 100 is a device array substrate, and the second substrate 200 is a color filter substrate. In some embodiments, the first substrate 100 may include a plurality of scan lines (not shown), a plurality of data lines (not shown), a plurality of transistors (not shown), and a plurality of electrodes (not shown). In addition, the first substrate 100 may further include a plurality of insulating layers (not shown) covering the above-described members, and a material of the insulating layers may include an inorganic material or an organic material. Referring to fig. 1 and fig. 2A, in some embodiments, the second substrate 200 may include a plurality of sets of color filters CF, for example, wherein one set of color filters CF includes at least three color filters (e.g., a first color filter CF1, a second color filter CF2, and a third color filter CF3), which may have different colors. For example, the colors of the first color filter CF1, the second color filter CF2 and the third color filter CF3 are three primary colors, for example. In the embodiment, the first color filter CF1 is red, the second color filter CF2 is green, and the third color filter CF3 is blue, but the invention is not limited thereto. For example, the second substrate 200 may also include a fourth color filter, a fifth color filter, or more color filters. In addition, the color filters CF1, CF2 and CF3 with different colors in each group of color filters CF have the same number. For example, the set of color filters CF may include, for example, a color filter CF1, a color filter CF2 and a color filter CF3, which is not limited in the present embodiment. In addition, in some embodiments, the second substrate 200 further includes a light shielding pattern (not shown), which is, for example, a black matrix. However, the invention is not limited thereto. In addition, the second substrate 200 may further include a plurality of insulating layers (not shown) covering the above-described members, and a material of the insulating layers may include an inorganic material or an organic material. In another embodiment, the first substrate 100 may be a color filter substrate, and the second substrate 200 may be a device array substrate. It should be noted that the number of the color filters CF in the second substrate 200 shown in fig. 2A to 2C is only an exemplary embodiment, and does not represent the number of the color filters CF in the second substrate 200.
Referring to fig. 1 and fig. 3A, in the present embodiment, a dielectric layer 110 is disposed between a first substrate 100 and a second substrate 200. The display medium layer 110 includes, for example, twisted nematic liquid crystal, vertical alignment liquid crystal, in-plane switching liquid crystal, boundary electric field switching liquid crystal, or other suitable medium.
Referring to fig. 1 and fig. 3A, in the present embodiment, the sealant 120 is disposed between the first substrate 100 and the second substrate 200. From another perspective, the sealant 120 is disposed in the non-display region NR of the curved display panel 10, for example. The sealant 120 may include a plurality of auxiliary spacers (not shown), for example. For example, the sealant 120 is, for example, conductive particles with a specific size or an auxiliary spacer with a specific shape, but the invention is not limited thereto. The sealant 120 may be formed by, for example, irradiating ultraviolet light and then curing, and is used to join the first substrate 100 and the second substrate 200.
Referring to fig. 1 and fig. 3A, in the present embodiment, a plurality of first spacers SOC1 and a plurality of second spacers SOC2 are disposed between the first substrate 100 and the second substrate 200. The first spacer SOC1 and the second spacer SOC2 are used to support the first substrate 100 and the second substrate 200, and the first spacer SOC1 and the second spacer SOC2 can maintain a gap between the first substrate 100 and the second substrate 200, so that the display medium layer 110 can be filled in the gap and sandwiched between the first substrate 100 and the second substrate 200. The material of the first spacer SOC1 and the second spacer SOC2 is, for example, a compound formed by polysiloxane, epoxy resin, acryl resin, and the like. In some embodiments, the first spacer SOC1 and the second spacer SOC2 are in the form of columns, which may be cylindrical or square columns, for example. The first spacer SOC1 and the second spacer SOC2 have a bottom surface SOC1_ B, SOC2_ B and a top surface SOC1_ T, SOC2_ T, respectively. The first spacer SOC1 and the second spacer SOC2 each have a bottom surface SOC1_ B, SOC2_ B, for example, close to the surface 201 of the second substrate 200, and the first spacer SOC1 and the second spacer SOC2 each have a top surface SOC1_ T, SOC2_ T, for example, far from the surface 201 of the second substrate 200 and facing the surface 101 of the first substrate 100. In some embodiments, the first spacer SOC1 and the second spacer SOC2 extend from the surface 201 of the second substrate 200 toward a direction facing the first substrate 100 (i.e., the negative z-axis direction). That is, the bottom surface SOC1_ B, SOC2_ B of each of the first spacer SOC1 and the second spacer SOC2 is, for example, in contact with the second substrate 200, for example, in contact with the surface 201 of the second substrate 200, but the invention is not limited thereto. In some embodiments, the bottom surface SOC1_ B, SOC2_ B may be in contact with the color filter CF, the light blocking pattern, or the insulating layer on the second substrate 200. In the embodiment, the first spacer SOC1 has a top surface SOC1_ T contacting the surface 101 of the first substrate 100, but the invention is not limited thereto. In some embodiments, the top surface SOC1_ T may be in contact with an insulating layer on the first substrate 100. In addition, in the embodiment, the second spacer SOC2 has the top surface SOC2_ T not contacting the surface 101 of the first substrate 100, but the invention is not limited thereto. The second spacer SOC2 also has the purpose of supporting the first substrate 100 and the second substrate 200, for example. In the present embodiment, the height H2 of the second spacer SOC2 is less than the height H1 of the first spacer SOC 1. The height H2 of the second spacer SOC2 is, for example, 0.14-0.978 times the height H1 of the first spacer SOC 1. In some embodiments, the height H1 of the first spacer SOC1 is between 1.2 μm and 4.5 μm, and the height H2 of the second spacer SOC2 is between 0.1 μm and 4.4 μm.
Referring to fig. 1, in the present embodiment, the long side L of the display area AR of the curved display panel 10 includes a first portion L1, a second portion L2, a third portion L3 and a fourth portion L4, and the short side S includes a first portion S1 and a second portion S2. The first portion L1 of the long side L extends from the center LC of the long side L along the x-axis direction and the opposite direction thereof, for example, one end of the second portion L2 is connected to one end of the first portion L1, for example, one end of the third portion L3 is connected to the other end of the second portion L2, for example, and one end of the fourth portion L4 is connected to the other end of the third portion L3, for example. Similarly, the first portion S1 of the short side S extends from the center SC of the short side S in the y-axis direction and the opposite direction thereof, for example, one end of the second portion S2 is connected to one end of the first portion S1, for example, and the other end of the second portion S2 is connected to the other end of the fourth portion L4 of the long side L, for example. In some embodiments, the length of the long side L of the curved display panel 10 is 200mm to 310mm, and the length of the short side S is 50mm to 130 mm. In addition, in some embodiments, the length of the first portion L1 of the long side L is 30mm to 50mm, the length of the second portion L2 is 20mm to 30mm, the length of the third portion L3 is 40mm to 60mm, and the length of the fourth portion L4 is 25mm to 40 mm. In some embodiments, the length of the first portion S1 of the short side S is 24mm to 60mm, and the length of the second portion S2 is 13mm to 35 mm.
In some embodiments, the display area AR of the curved display panel 10 may be divided into a plurality of areas. In the embodiment shown in fig. 1, the curved display panel 10 includes four first regions a1, one second region a2, two third regions A3, and two fourth regions a 4. The first area a1 is located at four corner areas of the display area AR, for example, and in detail, the first area a1 includes two opposite sides, wherein one side is composed of a third portion L3 and a fourth portion L4 of the long side L, and wherein another side isOne side is formed by the second portion S2 of the short side S. The second region a2 is located in a central region of the display area AR, for example, and in detail, the second region a2 includes two opposite sides, for example, wherein one side is composed of the first portion L1, the second portion L2 and the third portion L3 of the long side L, and wherein the other side is composed of the first portion S1 of the short side S. The third region A3 is located in a region of the display area AR defined by the first region a1 and the second region a2, and the region is close to the long side L of the curved display panel 10, so the third region A3 of the present embodiment is defined as a long side region. In detail, the third region a3 includes two opposite sides, wherein one side is composed of the first portion L1 and the second portion L2 of the long side L, and the other side is composed of the second portion S2 of the short side S. The fourth area a4 is also located in the area defined by the first area a1 and the second area a2 in the display area AR, and the area is close to the short side S of the curved display panel 10, so the fourth area a4 of the present embodiment is defined as the short side area. In detail, the fourth region a4 comprises, for example, two opposite sides, wherein one side is constituted by the fourth portion L4 of the long side L and wherein the other side is constituted by the first portion S1 of the short side S. In one embodiment, the first area a1 at one corner of the display area AR of the curved display panel 10 has a size of 875mm2～3500mm2The second area A2 located at the center of the display area AR of the curved display panel 10 has 3600mm2～13800mm2And the third area a3 located near the long side L of the display area AR of the curved display panel 10 has 910mm2～3850mm2And the fourth area a4 located near the short side S of the display area AR of the curved display panel 10 has a size of 600mm2～2400mm2The area of (a).
Fig. 2A to 2C are schematic top views illustrating distribution of the first spacers SOC1 on each area according to various embodiments in the curved display panel 10 of fig. 1.
In the present embodiment, the density of the plurality of first spacers SOC1 in the first region a1 is greater than the density of the plurality of first spacers SOC1 in the second region a 2. In detail, in the embodiment shown in fig. 2A and 2B, there are 54 color filters in the first area a1 located at the corner of the display area AR of the curved display panel 10, wherein the first spacer SOC1 is provided with 42 in the first area a1, that is, the density of the first spacer SOC1 in the first area a1 is 42 per area of 54 color filters, in other words, 0.78 first spacers SOC1 are provided on average on 1 color filter in the first area a 1. In the embodiment shown in fig. 2C, there are 18 groups of color filters CF in the first area a1 located at the corner of the display area AR of the curved display panel 10, wherein the first spacer SOC1 is provided with 46 in the first area a1, i.e. the density of the first spacer SOC1 in the first area a1 is 46/54 area of color filters. In contrast, in the embodiment shown in fig. 2A to 2C, there are 156 color filters in the second region a2 located in the center of the display area AR of the curved display panel 10, wherein the first spacer SOC1 is provided with 52 in the second region a2, that is, the density of the first spacer SOC1 in the second region a2 is 52 per area of 156 color filters, in other words, 0.33 first spacers SOC1 are provided on average on 1 color filter in the second region a 2. Therefore, the density of the first spacer SOC1 of the present embodiment in the first region a1 is greater than the density of the plurality of first spacer SOCs 1 in the second region a 2. Based on this, the first spacer SOC1 can resist the excessive stress generated by the subsequent processes (e.g., the process of attaching the cover plate or assembling the backlight module) due to the distribution, so as to prevent the display medium in the display medium layer 110 from being pushed to the periphery of the curved display panel 10, such as two sides of the long side L, two sides of the short side S, or four corners of the boundary between the long side L and the short side S of the display area AR of the curved display panel 10, thereby preventing the display medium from being unevenly distributed to generate abnormal gaps and stripes, so that the curved display panel 10 of the present embodiment has good display quality.
In the embodiment shown in fig. 2A, the density of the first spacer SOC1 in the first region a1 is greater than the density of the first spacer SOC1 in the third region A3 and the fourth region a 4. In detail, in the present embodiment, there are 63 color filters in the third area A3 located in the display area AR of the curved display panel 10, wherein the first spacer SOC1 is provided with 15 in the third area A3, that is, the density of the first spacer SOC1 in the third area A3 is 15/area of 63 color filters, in other words, 0.24 first spacers SOC1 are provided on average on 1 color filter in the third area A3. Also, in the present embodiment, there are 36 color filters in the fourth region a4 located in the display area AR of the curved display panel 10, wherein the first spacer SOC1 is provided with 12 in the fourth region a4, that is, the density of the first spacer SOC1 in the fourth region a4 is 12/area of 36 color filters, in other words, 0.33 first spacers SOC1 are provided on average on 1 color filter in the fourth region a 4. Therefore, the density of the first spacer SOC1 in the first region a1 of the present embodiment is greater than the density of the plurality of first spacer SOCs 1 in the third region A3 and the fourth region a 4.
In the embodiment shown in fig. 2B, the density of the first spacer SOC1 in the fourth region a4 is greater than the density of the first spacer SOC1 in the second region a2 and the third region A3, and the density of the first spacer SOC1 in the first region a1 may be substantially greater than or equal to the density of the first spacer SOC1 in the fourth region a 4. In detail, in the present embodiment, there are 63 color filters in the third area A3 located in the display area AR of the curved display panel 10, wherein the first spacer SOC1 is provided with 15 in the third area A3, that is, the density of the first spacer SOC1 in the third area A3 is 15/area of 63 color filters, in other words, 0.24 first spacers SOC1 are provided on average on 1 color filter in the third area A3. Also, in the present embodiment, there are 36 color filters in the fourth area a4 located in the display area AR of the curved display panel 10, wherein 28 first spacers SOC1 are provided in the fourth area a4, that is, the density of the first spacers SOC1 in the fourth area a4 is 28/area of 36 color filters, in other words, 0.78 first spacers SOC1 are provided on average on 1 color filter in the fourth area a 4. Therefore, the density of the first spacer SOC1 in the fourth region a4 of the present embodiment is greater than the density of the plurality of first spacer SOCs 1 in the second region a2 and the third region A3.
In the embodiment shown in fig. 2C, the density of first spacer SOC1 in first region a1 is greater than the density of first spacer SOC1 in third region A3 and fourth region a4, and the density of first spacer SOC1 in third region A3 and fourth region a4 is greater than the density of first spacer SOC1 in second region a 2. In detail, in the present embodiment, there are 63 color filters in the third area A3 located in the display area AR of the curved display panel 10, wherein 31 first spacers SOC1 are provided in the third area A3, that is, the density of the first spacers SOC1 in the third area A3 is 31/area of 63 color filters, in other words, 0.49 first spacers SOC1 are provided on average on 1 color filter in the third area A3. Also, in the present embodiment, there are 36 color filters in the fourth region a4 located in the display area AR of the curved display panel 10, wherein the first spacer SOC1 is provided with 20 in the fourth region a4, that is, the density of the first spacer SOC1 in the fourth region a4 is 20/area of 36 color filters, in other words, 0.56 first spacers SOC1 are provided on average on 1 color filter in the fourth region a 4. Therefore, the density of the first spacer SOC1 in the first region a1 is greater than the density of the plurality of first spacer SOCs 1 in the third region A3 and the fourth region a4, and the density of the first spacer SOC1 in the third region A3 and the fourth region a4 is greater than the density of the first spacer SOC1 in the second region a 2.
In addition, in some embodiments, at least one first spacer SOC1 may be disposed on each set of color filters CF correspondingly. The number of the color filters CF1, CF2, and CF3 of different colors in each set of color filters CF is, for example, the same. For example, the set of color filters CF may include a color filter CF1, a color filter CF2 and a color filter CF3, which is not limited in the present embodiment. In some embodiments, the first spacers SOC1 are preferably disposed corresponding to the blue color filter CF3, but the invention is not limited thereto. In the present embodiment, the average number of the first spacers SOC1 provided corresponding to the set of color filters CF in the first region a1 is larger than the average number of the first spacers SOC1 provided corresponding to the set of color filters CF in the second region a 2. In detail, the following description takes an example in which a set of color filters CF includes a color filter CF1, a color filter CF2 and a color filter CF 3. In the embodiment shown in fig. 2A and 2B, the first spacers SOC1 may be disposed corresponding to 1 color filter or 3 color filters in the group of color filters CF in the first region a1, that is, the number of the first spacers SOC1 disposed corresponding to the group of color filters CF in the first region a1 is, for example, 1 or 3, and the average number of the first spacers SOC1 disposed corresponding to the group of color filters CF is 2.33; in contrast, the first spacers SOC1 are each disposed corresponding to, for example, 1 color filter in the group of color filters CF in the second region a2, that is, the average number of the spacers disposed corresponding to the group of color filters CF is 1. In the embodiment shown in fig. 2C, the first spacers SOC1 may be disposed corresponding to 1 color filter or 3 color filters in the set of color filters CF in the first region a1, and the average number of the first spacers SOC1 disposed corresponding to the set of color filters CF is 2.56; in contrast, the first spacers SOC1 are each disposed corresponding to, for example, 1 color filter in the group of color filters CF in the second region a2, that is, the average number of the spacers disposed corresponding to the group of color filters CF is 1. Based on this, the first spacer SOC1 can resist the excessive stress generated by the subsequent processes (e.g., the process of attaching the cover plate or assembling the backlight module) due to the distribution, so as to prevent the display medium in the display medium layer 110 from being pushed to the periphery of the curved display panel 10, such as two sides of the long side L, two sides of the short side L, or four corners of the boundary between the long side L and the short side S of the display area AR of the curved display panel 10, thereby preventing the display medium from being unevenly distributed to generate abnormal gaps and stripes, so that the curved display panel 10 of the present embodiment has good display quality.
In addition, in the embodiment shown in fig. 2A, the average number of the first spacers SOC1 provided corresponding to the set of color filters CF in the first region a1 is, for example, larger than the average number of the first spacers SOC1 provided corresponding to the set of color filters CF in the third region A3 and the fourth region a 4. In detail, the following description takes an example in which a set of color filters CF includes a color filter CF1, a color filter CF2 and a color filter CF 3. The first spacers SOC1 are provided in the third region A3, for example, corresponding to 1 color filter of the group of color filters CF or not, and the average number of the first spacers SOC1 provided corresponding to the group of color filters CF is 0.71. The first spacers SOC1 are each provided in the fourth region a4, for example, so as to correspond to 1 color filter in the group of color filters CF, that is, the average number of the spacers provided in correspondence with the group of color filters CF is 1.
In the embodiment shown in fig. 2B, the average number of the first spacers SOC1 provided corresponding to the group of color filters CF in the fourth region a4 is, for example, larger than the average number of the first spacers SOC1 provided corresponding to the group of color filters CF in the second region a2 and the third region A3. In detail, the following description takes an example in which a set of color filters CF includes a color filter CF1, a color filter CF2 and a color filter CF 3. The first spacers SOC1 are disposed in the fourth region a4, for example, corresponding to 1 color filter or 3 color filters in the group of color filters CF, and the average number of the first spacers SOC1 disposed corresponding to the group of color filters CF is 2.33; in contrast, the first spacers SOC1 are provided or not provided in the third region A3, for example, corresponding to 1 color filter of the group of color filters CF, and the average number of the spacers SOC1 provided corresponding to the group of color filters CF is 0.71. In addition, the average number of the first spacers SOC1 corresponding to the set of color filters CF in the first region a1 may be, for example, the same as the average number of the first spacers SOC1 corresponding to the set of color filters CF in the fourth region a 4.
In the embodiment shown in fig. 2C, the average number of the first spacers SOC1 disposed corresponding to the set of color filters CF in the first region a1 may be, for example, greater than the average number of the first spacers SOC1 disposed corresponding to the set of color filters CF in the third region A3 and the fourth region a 4. In detail, the following description takes an example in which a set of color filters CF includes a color filter CF1, a color filter CF2 and a color filter CF 3. The first spacers SOC1 are provided in the third region A3, for example, so as to correspond to 1 color filter or 3 color filters in the group of color filters CF, and the average number of the first spacers SOC1 provided corresponding to the group of color filters CF is 1.48; in contrast, the first spacers SOC1 are also disposed in the fourth region a4 corresponding to 1 color filter or 3 color filters in the set of color filters CF, for example, and the average number of the first spacers SOC1 disposed corresponding to the set of color filters CF is 1.67.
Additionally, in some embodiments, the first spacer SOC1 has a top surface SOC1_ T that contacts the surface 101 of the first substrate 100. Each first spacer SOC1 in this embodiment has, for example, substantially the same surface area of the top surface SOC1_ T. Based on this, the more the first spacers SOC1 are correspondingly disposed in each region, the larger the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 is. The number of the first spacers SOC1 in each region is described in detail in the foregoing embodiments, and is not described herein again. In brief, the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the first region a1 is, for example, larger than the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the second region a 2. In addition, in the embodiment shown in fig. 2A, the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the first region a1 is, for example, larger than the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the third region A3 and the fourth region a 4. In the embodiment shown in fig. 2B, the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the fourth region a4 is, for example, greater than the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the second region a2 and the third region A3, and the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the first region a1 may, for example, be the same as the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the fourth region a 4. In the embodiment shown in fig. 2C, the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the first region a1 may be, for example, larger than the total area of the first spacers SOC1 in contact with the surface 101 of the first substrate 100 in the third region A3 and the fourth region a 4. Based on this, the first spacer SOC1 can resist the excessive stress generated by the subsequent processes (e.g., the process of attaching the cover plate or assembling the backlight module) due to the distribution, so as to prevent the display medium in the display medium layer 110 from being pushed to the periphery of the curved display panel 10, such as two sides of the long side L, two sides of the short side L, or four corners of the boundary between the long side L and the short side S of the display area AR of the curved display panel 10, thereby preventing the display medium from being unevenly distributed to generate abnormal gaps and stripes, so that the curved display panel 10 of the present embodiment has good display quality.
It should be noted that the distribution of the second spacers SOC2 is not particularly limited in this embodiment, and may be, for example, randomly distributed, but the invention is not limited thereto. Based on this, fig. 2A to 2C omit illustration of the distribution of the second spacers SOC 2.
Fig. 3A to 3C respectively show cross-sectional schematic views of a sub-region a11 of a first region a1 and a sub-region a21 of a second region a2 of a display area AR of the curved display panel 10, wherein the proportions of the sub-region a11 of the first region a1 and the sub-region a21 of the second region a2 in the regions in which the respective sub-regions are located are substantially the same.
In the embodiment shown in fig. 3A, there are, for example, 3 first spacers SOC1 and 2 second spacers SOC2 on the partial region a11 of the first region a1, and there are, for example, 2 first spacers SOC1 and 12 second spacers SOC2 on the partial region a21 of the second region a2, based on which the average number of first spacers SOC1 in the first region a1 is greater than the average number of first spacers SOC1 in the second region a 2. Also, the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the first region a1 is larger than the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the second region a 2. Further, the density of the first spacer SOC1 over the first region a1 is greater than the density of the first spacer SOC1 over the second region a 2.
In the embodiment shown in fig. 3B, there are, for example, 4 first spacers SOC1 and 1 second spacer SOC2 on the partial region a11 of the first region a1, and there are, for example, 2 first spacers SOC1 and 12 second spacers SOC2 on the partial region a21 of the second region a2, based on which the average number of first spacers SOC1 in the first region a1 is greater than the average number of first spacers SOC1 in the second region a 2. Also, the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the first region a1 is larger than the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the second region a 2. Further, the density of the first spacer SOC1 over the first region a1 is greater than the density of the first spacer SOC1 over the second region a 2.
In the embodiment shown in fig. 3C, there are, for example, 5 first spacers SOC1 and 0 second spacers SOC2 on the partial region a11 of the first region a1, and there are, for example, 2 first spacers SOC1 and 12 second spacers SOC2 on the partial region a21 of the second region a2, based on which the average number of first spacers SOC1 in the first region a1 is greater than the average number of first spacers SOC1 in the second region a 2. Also, the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the first region a1 is larger than the total area of the first spacer SOC1 in contact with the surface 101 of the first substrate 100 in the second region a 2. Further, the density of the first spacer SOC1 over the first region a1 is greater than the density of the first spacer SOC1 over the second region a 2.
In summary, the density, the average number or the total area in contact with the first spacer in the first region (the corner region) of the curved display panel according to an embodiment of the present invention is greater than the density, the average number or the total area in contact with the first spacer in the second region (the central region), so that when the curved display panel performs a process such as attaching a cover plate or assembling a backlight module so as to generate an excessive stress in the first region of the curved display panel, the first spacer with a larger density, average number or total area in contact with the first substrate can be disposed in the first region to solve the problem of uneven distribution of the display medium in the curved display panel, and prevent the curved display panel from generating a locally abnormal liquid crystal layer gap in the first region. In addition, the speckle phenomenon of the curved display panel in the first area can be reduced, so that the display quality of the curved display panel is improved. In addition, in the curved display panel according to another embodiment of the present invention, the curved display panel may further include a first spacer in which the density, the average number, or the total area in contact with the first substrate of the first spacer in the third region (the region near the long side of the curved display panel) and the fourth region (the region near the short side of the curved display panel) are greater than the density, the average number, or the total area in contact with the first substrate of the first spacer in the second region (the central region), so as to avoid the curved display panel from generating a locally abnormal liquid crystal layer gap in the above regions. In addition, the speckle phenomenon of the curved display panel in the area can be reduced, so that the display quality of the curved display panel is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (12)

1. A curved display panel, comprising:
a first substrate;
a second substrate comprising a first surface facing the first substrate and a second surface distal from the first substrate;
a plurality of first spacers disposed between the first substrate and the second substrate;
a plurality of second spacers disposed between the first substrate and the second substrate, wherein the plurality of first spacers and the plurality of second spacers extend from the first surface toward a direction facing the first substrate, and a height of the plurality of second spacers is less than a height of the plurality of first spacers; and
the display medium layer is arranged between the first substrate and the second substrate;
wherein the curved display panel comprises a first area and a second area, the density of the first spacers in the first area is greater than the density of the first spacers in the second area,
wherein the first region is a corner region and the second region is a central region.
2. The curved display panel according to claim 1, further comprising a third area and a fourth area defined by the first area and the second area, wherein the density of the first spacers in the first area is greater than the density of the first spacers in the third area and the fourth area, wherein the third area is a long-side area and the fourth area is a short-side area.
3. The curved display panel according to claim 1, further comprising a third area and a fourth area defined by the first area and the second area, wherein the density of the first spacers in the first area is greater than the density of the first spacers in the third area, and the density of the first spacers in the first area is the same as the density of the first spacers in the fourth area, wherein the third area is a long side area and the fourth area is a short side area.
4. The curved display panel according to claim 1, wherein the second substrate comprises a plurality of sets of color filters, each set of color filters is correspondingly provided with at least one first spacer, and the number of the color filters with different colors in each set of color filters is the same.
5. The curved display panel according to claim 4, wherein the average number of the at least one first spacer disposed in the first region corresponding to a group of color filters is greater than the average number of the at least one first spacer disposed in the second region corresponding to a group of color filters.
6. The curved display panel according to claim 4, further comprising a third area and a fourth area defined by the first area and the second area, wherein an average number of the at least one first spacer disposed corresponding to a set of color filters in the first area is greater than an average number of the at least one first spacer disposed corresponding to a set of color filters in the third area and the fourth area, wherein the third area is a long-side area and the fourth area is a short-side area.
7. The curved display panel according to claim 4, further comprising a third area and a fourth area defined by the first area and the second area, wherein an average number of the at least one first spacer disposed in the fourth area corresponding to a set of color filters is greater than an average number of the at least one first spacer disposed in the second area and the third area corresponding to a set of color filters, wherein the third area is a long-side area and the fourth area is a short-side area.
8. The curved display panel according to claim 1, wherein the height of the second spacers is 0.14 to 0.978 times the height of the first spacers.
9. The curved display panel according to claim 1, wherein the height of the first spacers is 1.2 μm to 4.5 μm, and the height of the second spacers is 0.1 μm to 4.4 μm.
10. A curved display panel, comprising:
a first substrate;
a second substrate comprising a first surface facing the first substrate and a second surface distal from the first substrate;
a plurality of first spacers disposed between the first substrate and the second substrate;
a plurality of second spacers disposed between the first substrate and the second substrate, wherein the plurality of first spacers and the plurality of second spacers extend from the first surface toward a direction facing the first substrate, and a height of the plurality of second spacers is less than a height of the plurality of first spacers; and
the display medium layer is arranged between the first substrate and the second substrate;
wherein the plurality of first spacers are in contact with the first substrate,
wherein the curved display panel comprises a first region and a second region, a total area of the first spacers in contact with the first substrate in the first region is larger than a total area of the first spacers in contact with the first substrate in the second region,
wherein the first region is a corner region and the second region is a central region.
11. The curved display panel according to claim 10, further comprising a third region and a fourth region defined by the first region and the second region, wherein a total area of the first spacers contacting the first substrate in the first region is larger than a total area of the first spacers contacting the first substrate in the third region and the fourth region, wherein the third region is a long-side region and the fourth region is a short-side region.
12. The curved display panel according to claim 10, further comprising a third region and a fourth region defined by the first region and the second region, wherein a total area of the first spacers contacting the first substrate in the fourth region is larger than a total area of the first spacers contacting the first substrate in the second region and the third region, wherein the third region is a long-side region and the fourth region is a short-side region.
CN202010317904.2A 2020-04-21 2020-04-21 Curved surface display panel Pending CN113534541A (en)

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CN108169963A (en) * 2017-12-27 2018-06-15 武汉华星光电技术有限公司 Curved-surface display device and its display panel
CN109061956A (en) * 2018-09-29 2018-12-21 武汉华星光电技术有限公司 Display panel, display module and electronic device
CN110703510A (en) * 2019-10-29 2020-01-17 武汉华星光电技术有限公司 Liquid crystal display panel and display device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110228190A1 (en) * 2010-03-22 2011-09-22 Au Optronics Corporation Curved display panel
CN104991382A (en) * 2015-08-07 2015-10-21 京东方科技集团股份有限公司 Display panel, manufacturing method thereof and display device
CN108169963A (en) * 2017-12-27 2018-06-15 武汉华星光电技术有限公司 Curved-surface display device and its display panel
CN109061956A (en) * 2018-09-29 2018-12-21 武汉华星光电技术有限公司 Display panel, display module and electronic device
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