CN113534540A

CN113534540A - Display panel

Info

Publication number: CN113534540A
Application number: CN202010304471.7A
Authority: CN
Inventors: 陈谚宗
Original assignee: Hannstar Display Corp
Current assignee: Hannstar Display Corp
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2021-10-22
Anticipated expiration: 2040-04-17
Also published as: CN113534540B

Abstract

The invention provides a display panel, which is provided with a bending shaft, a first area and a second area, wherein the first area and the second area are arranged on one side of the bending shaft, and the first area is positioned between the bending shaft and the second area. The display panel comprises a first substrate, a frame glue pattern and a second substrate. The first substrate has a display area and a peripheral area. The second substrate is arranged opposite to the first substrate. The frame glue pattern is arranged in the peripheral area and is positioned between the first substrate and the second substrate. The frame glue pattern comprises a first extension section. The first extension extends in a first direction. The first direction is not parallel to the extension direction of the bending axis. The first extension includes a plurality of projections. A portion of the projections are located in the first region and have a first distribution density. Another portion of the projections is located in the second region and has a second distribution density. The second distribution density is greater than the first distribution density.

Description

Display panel

Technical Field

The present invention relates to a display technology, and more particularly, to a curved display panel or a flexible display panel.

Background

With the development of display technology, the application range of display panels is becoming wider, and the application of curved display panels and flexible display panels is one of the key points of development of many brands and factories in recent years. For example, applications of a curved display panel with a thinned hard substrate, such as a curved television (curved TV), a curved computer display (curved monitor), and a curved mobile phone (curved phone), or applications of a flexible display panel with a flexible substrate, such as wearable devices like watches and clothes, or portable devices like mobile phones and electronic paper, can be seen. Among them, the requirement of the lcd panel for the size and curvature of curvature is continuously rising, and it is a technical problem to be solved to maintain the display quality, such as the uniformity of the display surface in the dark state.

Fig. 1 is a schematic top view of a display panel in the prior art. Fig. 2 is a schematic cross-sectional view of the display panel of fig. 1 in a bent state along a sectional line a-a'. Referring to fig. 1 and 2, the display panel 50 includes a first substrate 101, a second substrate 102, a sealant pattern SP, and a liquid crystal layer LC. Specifically, fig. 1 omits to show the liquid crystal layer LC. The display panel 50 has a display region DR and a peripheral region PR. The second substrate 102 is disposed opposite to the first substrate 101. The sealant pattern SP is sandwiched between the first substrate 101 and the second substrate 102 and located in the peripheral region PR. The display medium layer DML is disposed between the first substrate 101 and the second substrate 102.

Specifically, the sealant pattern SP includes two first extension segments SPa and two second extension segments SPb. The first extension segments SPa are arranged in the direction D2 and extend in the direction D1, and the second extension segments SPb are arranged in the direction D1 and extend in the direction D2, wherein the same sides of two second extension segments SPb are respectively connected to two opposite sides of one first extension segment SPa, and the other sides of two second extension segments SPb are respectively connected to two opposite sides of the other first extension segment SPa.

The display panel 50 has a bending axis SA1, and two portions of the display panel 50 located at two opposite sides of the bending axis SA1 are symmetrically bent. As shown in fig. 2, after the display panel 50 is bent, the first substrate 101 and the second substrate 102 generate stresses in different directions, so that the direction of the shear stress SF1 between the first substrate 101 and the sealant pattern SP is different from the direction of the shear stress SF2 between the second substrate 102 and the sealant pattern SP, thereby causing the display panel 50 to have non-uniform peripheral images (i.e., peripheral mura).

Disclosure of Invention

The invention provides a display panel with better picture uniformity.

The display panel of the invention is provided with a bending shaft, a first area and a second area which are arranged on one side of the bending shaft, and the first area is positioned between the bending shaft and the second area. The display panel comprises a first substrate, a frame glue pattern and a second substrate. The first substrate has a display area and a peripheral area. The second substrate is arranged opposite to the first substrate. The frame glue pattern is arranged in the peripheral area and is positioned between the first substrate and the second substrate. The frame glue pattern comprises a first extension section. The first extension extends in a first direction. The first direction is not parallel to the extension direction of the bending axis. The first extension includes a plurality of projections. A portion of the projections are located in the first region and have a first distribution density. Another portion of the projections is located in the second region and has a second distribution density. The second distribution density is greater than the first distribution density.

In an embodiment of the invention, a portion of the plurality of protruding portions of the display panel includes a first protruding portion and a second protruding portion adjacent to each other. Another portion of the projections includes a third projection and a fourth projection adjacent to each other. The distance between the first protruding portion and the second protruding portion is larger than the distance between the third protruding portion and the fourth protruding portion.

In an embodiment of the invention, another portion of the plurality of protruding portions of the display panel further includes a fifth protruding portion. The fifth projecting portion and the fourth projecting portion are adjacent to each other, and the distance between the fifth projecting portion and the fourth projecting portion is equal to or smaller than the distance between the third projecting portion and the fourth projecting portion.

In an embodiment of the invention, a portion of the plurality of protruding portions of the display panel includes a first protruding portion. Another portion of the projections includes a second projection, and a length of the first projection in the first direction is greater than a length of the second projection in the first direction.

In an embodiment of the invention, another portion of the plurality of protruding portions of the display panel further includes a third protruding portion. The third projecting portion and the second projecting portion are adjacent to each other, a distance between the third projecting portion and the bending axis is larger than a distance between the second projecting portion and the bending axis, and a length of the third projecting portion in the first direction is equal to or smaller than a length of the second projecting portion in the first direction.

The display panel of the invention is provided with a bending shaft, a first area and a second area which are arranged on one side of the bending shaft, and the first area is positioned between the bending shaft and the second area. The display panel comprises a first substrate, a frame glue pattern and a second substrate. The first substrate has a display area and a peripheral area. The second substrate is arranged opposite to the first substrate. The frame glue pattern is arranged in the peripheral area and is positioned between the first substrate and the second substrate. The frame glue pattern comprises a first extension section. The first extension extends in a first direction. The first direction is not parallel to the extension direction of the bending axis. The first extension section comprises a first protruding part and a second protruding part, the first protruding part and the second protruding part are respectively located in the first area and the second area, and the height of the second protruding part is larger than that of the first protruding part.

In an embodiment of the invention, the first extending section of the display panel further includes a third protruding portion, the third protruding portion and the second protruding portion are adjacent to each other, a distance between the third protruding portion and the bending axis is greater than a distance between the second protruding portion and the bending axis, and a height of the third protruding portion is equal to or greater than a height of the second protruding portion.

In an embodiment of the invention, each of the first protruding portion and the second protruding portion of the display panel is shaped as a broken line, a curved line, or a combination thereof.

In an embodiment of the invention, the display panel further has a symmetry axis, and a third region and a fourth region disposed at one side of the symmetry axis. The frame glue pattern further comprises a second extension section. The axis of symmetry is substantially parallel to the first direction. The third region is located between the axis of symmetry and the fourth region. The second extending section extends in a second direction, and the second direction is not parallel to the first direction. One part and the other part of the second extension section are respectively positioned in the third area and the fourth area, and the other part of the second extension section comprises at least one bulge.

The display panel of the invention is provided with a bending shaft, a first area and a second area which are arranged on one side of the bending shaft, and the first area is positioned between the bending shaft and the second area. The display panel comprises a first substrate, a frame glue pattern and a second substrate. The first substrate has a display area and a peripheral area. The second substrate is arranged opposite to the first substrate. The frame glue pattern is arranged in the peripheral area and is positioned between the first substrate and the second substrate. The frame glue pattern comprises a first extension section. The first extension extends in a first direction. The first direction is not parallel to the extension direction of the bending axis. One part of the first extension section is positioned in the first area and has a first density, and the other part of the first extension section is positioned in the second area and has a second density, and the second density is greater than the first density.

In view of the above, the display panel according to an embodiment of the invention has the sealant pattern sandwiched between the two substrates. By the fact that the density of the frame glue pattern in the region far away from the bending axis is larger than that of the frame glue pattern in the region near to the bending axis, shearing stress (shear stress) formed between the two substrates when the display panel is bent can be reduced, and display uniformity of the display panel in a bending state 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 display panel in the prior art;

FIG. 2 is a schematic cross-sectional view of the display panel of FIG. 1 in a bent state along a cross-sectional line A-A';

FIG. 3 is a schematic cross-sectional view of the display panel of FIG. 1 in a bent state along a cross-sectional line A-A';

FIG. 4 is a graph of the distribution of the relative offset of two substrates of the display panel of FIG. 1 under different bending curvatures;

FIG. 5 is a schematic top view of a display panel according to a first embodiment of the present invention;

FIG. 6 is a schematic top view of a display panel according to a variation of the first embodiment of the present invention;

FIG. 7 is a schematic top view of a display panel according to a second embodiment of the present invention;

FIG. 8 is a schematic top view of a display panel according to a third embodiment of the present invention;

FIG. 9 is a schematic top view of a display panel according to a fourth embodiment of the present invention;

FIG. 10 is a schematic top view of a display panel according to a fifth embodiment of the present invention;

fig. 11 is a schematic top view of a display panel according to a sixth embodiment of the invention.

Description of the reference numerals

10. 10a, 11, 12, 13, 14, 15, 50: a display panel;

101: a first substrate;

101a, 101b, 101c, 101 d: side edge

102: a second substrate;

110. 110A, 110B, 110C, 151: a projection;

111. 111A, 111B, 111C: a connecting portion;

120. 120A, 120B, 120C, 152: a projection;

121. 121A, 121B, 121C: a connecting portion;

c: a center of curvature;

DML: a display medium layer;

DR: a display area;

d1, D2, D3: direction;

h1, H2: a height;

l12, L13, L14, L21, L22: a length;

PR: a peripheral zone;

r: a radius of curvature;

SA 1: a bending shaft;

SA 2: an axis of symmetry;

SF1, SF 2: shear stress;

SP, SP-A, SP-B, SP-C, SP-D, SP-E, SP-F: a frame glue pattern;

SPa, SPa-A, SPa-A1, SPa-B, SPa-C, SPa-D, SPa-E, SPa-F: a first extension section;

SPb, SPb-A, SPb-A1, SPb-B, SPb-C, SPb-D, SPb-E, SPb-F: a second extension section;

s1, S2, S11, S12, S13, S14, S21, S22: spacing;

z1, Z2, Z3, Z4, Z1 ', Z2': an area;

A-A': and (6) cutting lines.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of a preferred embodiment, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, 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. 3 is a schematic cross-sectional view of the display panel of fig. 1 in a bent state along a sectional line a-a'. Fig. 4 is a distribution diagram of relative offset of two substrates under different bending curvatures of the display panel of fig. 1. In particular, the distribution curve of the relative offset versus the area shown in fig. 4 is measured along the sectional line a-a' of fig. 1 and the display panel is in a bent state. Referring to fig. 3 and 4, the display panel 50 has regions Z1, Z2, Z3, and Z4 symmetrically disposed on two opposite sides of the bending axis SA1, and the regions Z1, Z2, Z3, and Z4 are sequentially arranged in a direction away from the bending axis SA 1. That is, zone Z1 is located between zone Z2 and bending axis SA1, zone Z2 is located between zone Z3 and bending axis SA1, and zone Z3 is located between zone Z4 and bending axis SA 1. When the display panel 50 is in the curved state, the distance between the first substrate 101 and the curvature center C can be defined as the curvature radius R of the display panel 50 in the curved state, and the relative offset between the first substrate 101 and the second substrate 102 is generated and varies with different regions of the display panel 50. It should be noted that, for example, the display panel 50 may be made as a curved display panel when the display panel 50 is in the curved state, or the display panel 50 may be a flexible display panel and is in the curved state, but not limited thereto.

For example, the three curves shown in fig. 4 represent the relative offsets of the first substrate 101 and the second substrate 102 in different regions of the display panel 50 under three different radii of curvature (i.e., the radius of curvature R1, the radius of curvature R2, and the radius of curvature R3). Specifically, the three radii of curvature are arranged from small to large as radius of curvature R1, radius of curvature R2, and radius of curvature R3. As shown in fig. 4, the relative offset amount between the first substrate 101 and the second substrate 102 increases as the radius of curvature is smaller. For example, in the bending state of the curvature radius R1, the curvature radius R2, and the curvature radius R3, the maximum relative offsets between the first substrate 101 and the second substrate 102 are 6.39 micrometers, 3.50 micrometers, and 2.30 micrometers, respectively. In general, regardless of the curvature radius, the relative offset between the two substrates is generally gradually reduced from the area near the left side of the display panel 50 (or the area near the right side of the display panel 50) toward the bending axis SA 1. That is, the relative offset between the first substrate 101 and the second substrate 102 generally decreases toward the bending axis SA1, and the two substrates do not generate substantial relative offset at the position of the bending axis SA 1. Since the relative offset between the first substrate 101 and the second substrate 102 is proportional to the stress generated by the first substrate 101 and the second substrate 102 in different directions, when the display panel 50 is bent, different positions of the display panel 50 have different shear stresses, and the shear stresses increase in magnitude in a direction away from the bending axis SA1, thereby causing an uneven display screen. In addition, the stress at the four corners of the display panel 50 (such as the upper left corner, the lower left corner, the upper right corner and the lower right corner) is the greatest, so the uneven image at the four corners of the display panel 50 is more serious.

In order to solve the problem of non-uniformity of the display screen caused by different shearing stresses at different positions of the display panel after the display panel is bent, some embodiments of the present invention will be described in detail below. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

Fig. 5 is a schematic top view of a display panel according to a first embodiment of the invention. Referring to fig. 5, the display panel 10 includes ｃA first substrate 101, ｃA second substrate (not shown), ｃA sealant pattern SP- ｃA and ｃA display medium layer (not shown), and has ｃA bending axis sｃA1, such that the display panel 10 can be bent from two sides of the bending axis sｃA 1. The display panel 10 has a display region DR and a peripheral region PR. The first substrate 101 has a first side 101a and a second side 101b opposite to each other, and a third side 101c and a fourth side 101d opposite to each other. The second substrate is disposed opposite to the first substrate 101. The sealant pattern SP is sandwiched between the first substrate 101 and the second substrate and located in the peripheral region PR. The display medium layer is disposed between the first substrate 101 and the second substrate. In this embodiment, the display medium layer may include ｃA liquid crystal layer and is disposed in the cavity defined by the first substrate 101, the second substrate, and the sealant pattern SP- ｃA, but not limited thereto. That is, the display panel 10 of the present embodiment is a liquid crystal display panel, but not limited thereto. In other embodiments, the display panel 10 may be an electrophoretic display panel, an organic light emitting display panel or a micro light emitting diode display panel, and the display medium layer may include an electrophoretic layer or a light emitting diode, but not limited thereto. On the other hand, the sealant pattern SP is made of, for example, acrylic resin (acryl resin), epoxy resin (epoxy resin), photo-sensitive polymer (photo-sensitive) material, or other suitable sealing material.

A color filter layer (not shown) and a black matrix layer (not shown) may be disposed on the second substrate, and a plurality of data lines (data lines), a plurality of scan lines (scan lines) and a plurality of pixel structures (not shown) may be disposed on the first substrate 101, but not limited thereto. In other embodiments, the Color Filter layer may be disposed on the first substrate 101 along with the data lines, the scan lines and the pixel structures, i.e., a Color Filter on Array (COA) display panel. The sealant pattern SP- ｃA includes two first extension segments spｃA- ｃA and two second extension segments SPb- ｃA. The first extension segments SPa-a are arranged in the direction D2 and extend in the direction D1, and the second extension segments SPb-a are arranged in the direction D1 and extend in the direction D2, wherein the same sides of two second extension segments SPb-a are respectively connected to opposite sides of one first extension segment SPa-a, and the other sides of two second extension segments SPb-a are respectively connected to opposite sides of the other first extension segment SPa-a. In the embodiment, the direction D1 is substantially parallel to the first side 101a and the second side 101b of the first substrate 101, the direction D2 is substantially parallel to the third side 101c and the fourth side 101D of the first substrate 101, and the direction D1 is substantially perpendicular to the direction D2, but the invention is not limited thereto. The sealant pattern SP- ｃA of the display panel 10 has ｃA plurality of protrusions 110 arranged at intervals in the direction D1 and ｃA plurality of connecting portions 111 connected between the protrusions 110 (i.e. the first extending segment spｃA- ｃA of the sealant pattern SP- ｃA has ｃA plurality of protrusions 110 and ｃA plurality of connecting portions 111), and the connecting portions 111 are located between the protrusions 110 and the display region DR. However, the invention is not limited thereto, and according to other embodiments, the plurality of protrusions 110 may be disposed between the plurality of connection portions 111 and the display region DR (e.g., the sealant pattern SP-B of the display panel 11 in fig. 7).

It is noted that, in the present embodiment, the spacing S12 between two adjacent protrusions 110 in the region Z2 is smaller than the spacing S11 between two adjacent protrusions 110 in the region Z1, the spacing S13 between two adjacent protrusions 110 in the region Z3 is smaller than the spacing S12, and the spacing S14 between two adjacent protrusions 110 in the region Z4 is smaller than the spacing S13. The distribution density of the projections 110 in the region Z2 is thus greater than the distribution density of the projections 110 in the region Z1, the distribution density of the projections 110 in the region Z3 is greater than the distribution density of the projections 110 in the region Z2, and the distribution density of the projections 110 in the region Z4 is greater than the distribution density of the projections 110 in the region Z3, where the distribution density of the projections 110 refers to the number of projections 110 per unit area, the greater the distribution density of the projections 110; conversely, the smaller the number of protrusions 110 per unit area, the lower the distribution density of the protrusions 110. From another point of view, the first extension spｃA- ｃA of the sealant pattern SP- ｃA includes ｃA first portion, ｃA second portion, ｃA third portion and ｃA fourth portion respectively located in the regions Z1, Z2, Z3 and Z4, the density of the fourth portion of the first extension spｃA- ｃA of the sealant pattern SP- ｃA is greater than the density of the third portion of the first extension spｃA- ｃA of the sealant pattern SP- ｃA, the density of the third portion of the first extension spｃA- ｃA of the sealant pattern SP- ｃA is greater than the density of the second portion of the first extension spｃA- ｃA of the sealant pattern SP- ｃA, and the density of the second portion of the first extension spｃA- ｃA of the sealant pattern SP- ｃA is greater than the density of the first portion of the first extension spｃA- ｃA of the sealant pattern SP- ｃA, wherein the density of the sealant pattern SP- ｃA refers to ｃA ratio of the sealant pattern SP- ｃA in unit areｃA, the more the areｃA occupied by the frame glue pattern SP-A in the unit areｃA, the greater the density of the frame glue pattern SP-A; on the contrary, the less the areｃA occupied by the sealant pattern SP- ｃA in ｃA unit areｃA, the less the density of the sealant pattern SP- ｃA. For example, calculating the distribution density of the protrusions 110 in different regions (for example, any two of the regions Z1, Z2, Z3, and Z4) arranged along the direction parallel to the direction D1 or the density of the sealant pattern SP- ｃA in different regions may be, for example, taking ｃA sub-region with an areｃA ｃA in ｃA region, where the sub-region includes the protrusions 110 of the first extension spｃA- ｃA of the sealant pattern SP- ｃA to calculate the number of the protrusions 110 in ｃA unit areｃA, or the sub-region includes ｃA part of the first extension spｃA- ｃA of the sealant pattern SP- ｃA to calculate the occupation ratio of the sealant pattern SP- ｃA in ｃA unit areｃA; then, the frame is moved to another region along the direction of the parallel direction D1, and another sub-region with an areｃA also being ｃA is taken, the shape of the another sub-region is the same as that of the sub-region, and the another sub-region includes the protrusion 110 of the first extension spｃA- ｃA of the frame glue pattern SP- ｃA to calculate the number of the protrusion 110 in the unit areｃA, or the another sub-region includes another portion of the first extension spｃA- ｃA of the frame glue pattern SP- ｃA to calculate the occupation ratio of the frame glue pattern SP- ｃA in the unit areｃA, but not limited thereto. In the present embodiment, the number of regions on the left and right sides of the bending axis SA1 is four each, however, the present invention is not limited thereto. In other embodiments, the number of regions on the left and right sides of the bending axis SA1 may be other numbers, and/or the number of regions on the left and right sides of the bending axis SA1 may be different.

Referring to fig. 6, fig. 6 is a schematic top view of a display panel according to a variation of the first embodiment of the present invention. As shown in fig. 6, the sealant pattern SP-a1 of the display panel 10a includes two first extending segments SPa-a1 and two second extending segments SPb-a 1. The space between any two adjacent protrusions 110 of the plurality of protrusions 110 located on the side of the bending axis SA1 in the sealant pattern SP-a1 decreases in a direction away from the bending axis SA1 (e.g., in a direction opposite to the direction D1 or the direction D1), so that the distribution density of the protrusions 110 increases in a direction away from the bending axis SA1, and the density of the first extension SPa-a1 of the sealant pattern SP-a1 increases in a direction away from the bending axis SA 1. From another point of view, the distribution densities of the protrusions 110 in the regions Z1, Z2, Z3, Z4 are all different, and the distribution density of the protrusions 110 in each region increases in a direction away from the bending axis SA 1.

Accordingly, by the arrangement of the sealant patterns shown in fig. 5 and 6, the shearing stress formed between the first substrate 101 and the second substrate when the display panel is bent can be reduced, so as to reduce the relative offset between the two substrates, which is helpful to improve the display uniformity of the display panel in the bent state.

Referring to fig. 5 and 6, in the first embodiment and the modified embodiment, the sealant pattern SP-A, SP-a1 further includes a plurality of protrusions 120 arranged at intervals in the direction D2 and a plurality of connecting portions 121 connected between the protrusions 120 (i.e., the second extending segment SPb-A, SPb-a1 of the sealant pattern SP-A, SP-a1 includes a plurality of protrusions 120 and a plurality of connecting portions 121), and the connecting portions 121 are located between the protrusions 120 and the display region DR. However, the invention is not limited thereto, and according to other embodiments, the plurality of protrusions 120 may be disposed between the plurality of connection portions 121 and the display region DR (e.g., the sealant pattern SP-B of the display panel 11 in fig. 7). In the present embodiment and the modified embodiments, the

display panel

10, 10a further has a symmetry axis SA2 in the direction D2 and a region Z1 ', Z2' disposed on one side of the symmetry axis SA2, and the region Z1 'is located between the symmetry axis SA2 and the region Z2'.

As shown in fig. 5, a spacing S22 between two adjacent protrusions 120 located in the region Z2 'may be smaller than a spacing S21 between two adjacent protrusions 120 located in the region Z1', so that the distribution density of the protrusions 120 located in the region Z2 'is greater than the distribution density of the protrusions 120 located in the region Z1'. However, the present invention is not limited thereto, and as shown in fig. 6, the pitch between any two adjacent protrusions 120 of the plurality of protrusions 120 located at one side of the symmetry axis SA2 decreases in a direction away from the symmetry axis SA 2. From another point of view, the distribution density of the protrusions 120 in the region Z1 'is different from that in the region Z2', and the distribution density of the protrusions 120 in each region increases in a direction away from the second axis of symmetry SA 2. Accordingly, the distribution density of the convex portions 110 and 120 near the four corners (such as the upper left corner, the lower left corner, the upper right corner and the lower right corner) of the

display panels

10 and 10a can be increased, so as to further improve the uneven peripheral images of the

display panels

10 and 10a in the bent state, and particularly improve the uneven images of the four corners of the

display panels

10 and 10a in the bent state of the

display panels

10 and 10 a. However, the present invention is not limited thereto. In other embodiments, the distance between any two adjacent protrusions 120 on one side of the axis of symmetry SA2 may be the same, or the second extension SPb-A, SPb-a1 of the sealant pattern SP-A, SP-a1 may have protrusions only in the region Z2 ' or may not have protrusions in the regions Z1 ' and Z2 '. Similarly, calculating the distribution density of the protrusions 120 in different regions (e.g., the regions Z1 'and Z2') arranged along the direction parallel to the direction D2 may be, for example, taking ｃA sub-region with an areｃA B in ｃA region, and the sub-region includes the protrusions 120 of the second extension SPb- ｃA of the sealant pattern SP- ｃA to calculate the number of the protrusions 120 per unit areｃA; then, the frame is moved to another region along the direction parallel to the direction D2, and another sub-region with an areｃA also being B is taken, the shape of the another sub-region is the same as that of the sub-region, and the another sub-region includes the protrusions 120 of the second extension segment SPb- ｃA of the sealant pattern SP- ｃA to calculate the number of the protrusions in the unit areｃA, but not limited thereto.

In particular, in the present embodiment and the modified embodiments, since the bending axis SA1 is a symmetry axis of the

display panels

10 and 10a in the direction D1, the plurality of protrusions 110 and the plurality of connecting portions 111 located at two opposite sides of the bending axis SA1 are arranged in a mirror image arrangement with respect to the bending axis SA 1; similarly, the plurality of protrusions 120 and the plurality of connecting portions 121 located at two opposite sides of the symmetry axis SA2 are disposed in a mirror arrangement with respect to the symmetry axis SA2, but the invention is not limited thereto. In other embodiments, the protrusions 110 and the connecting portions 111 on two opposite sides of the bending axis SA1 and the protrusions 120 and the connecting portions 121 on two opposite sides of the symmetry axis SA2 can be adjusted to be non-mirror images according to actual design requirements (e.g., the way the panel is bent).

Fig. 7 is a schematic top view of a display panel according to a second embodiment of the invention. Referring to fig. 7, the sealant pattern SP-B of the display panel 11 includes two first extending segments SPa-B and two second extending segments SPb-B. The difference between the display panel 11 in fig. 7 and the display panel 10 in fig. 5 is that the plurality of protrusions 110 of the sealant pattern SP-B in fig. 7 are disposed between the plurality of connection portions 111 and the display region DR, and the plurality of protrusions 120 are disposed between the plurality of connection portions 121 and the display region DR, and the rest is similar to that in fig. 5, and thus, the description thereof is omitted.

In summary, the display panel has a bending axis and a first region and a second region disposed on one side of the bending axis, and the first region is located between the bending axis and the second region, and the display panel includes a first substrate and a second substrate disposed opposite to each other, and a sealant pattern located between the first substrate and the second substrate. The sealant pattern includes a first extending section extending in a first direction, the first direction is not parallel to the extending direction of the bending axis, the first extending section includes a plurality of protrusions, one portion (also called a first portion of the plurality of protrusions) and another portion (also called a second portion of the plurality of protrusions) of the plurality of protrusions are respectively located in the first region and the second region, the first portion and the second portion of the plurality of protrusions respectively have a first distribution density and a second distribution density, and the second distribution density is greater than the first distribution density. From another perspective, a portion of the first extension (also referred to as a first portion of the first extension) is located in the first region and has a first density, and another portion of the second extension (also referred to as a second portion of the first extension) is located in the second region and has a second density, the second density being greater than the first density. By the configuration, the phenomenon of uneven peripheral images of the display panel in a bending state can be improved. For example, the first region and the second region may be a region closer to the bending axis SA1 and a region farther from the bending axis SA1 of the regions Z1, Z2, Z3, Z4, respectively. The first portion of the plurality of protrusions may include first and second protrusions adjacent to each other, the second portion of the plurality of protrusions may include third and fourth protrusions adjacent to each other, and a distance between the first and second protrusions is greater than a distance between the third and fourth protrusions, so that the second distribution density is greater than the first distribution density. In addition, the second portion of the plurality of protrusions may further include a fifth protrusion, the fifth protrusion and the fourth protrusion are adjacent to each other, a distance between the fifth protrusion and the fourth protrusion is equal to a distance between the third protrusion and the fourth protrusion (for example, the distances between two adjacent protrusions 110 in a region in the embodiment of fig. 5 are equal), or the distance between the fifth protrusion and the fourth protrusion is smaller than the distance between the third protrusion and the fourth protrusion (for example, the distance between two adjacent protrusions 110 in the embodiment of fig. 6 decreases in a direction away from the bending axis SA 1). The display panel may further have a symmetry axis, and a third region and a fourth region disposed at one side of the symmetry axis, and the sealant pattern further includes a second extension section. The symmetry axis is substantially parallel to the first direction, the third region is located between the symmetry axis and the fourth region, the second extending section extends in the second direction, the second direction is not parallel to the first direction, a portion and another portion of the second extending section (also referred to as the first portion and the second portion of the second extending section, respectively) are located in the third region and the fourth region, respectively, and the second portion of the second extending section includes at least one protrusion (for example, the second extending section SPb-a in the embodiment of fig. 5 has the protrusion 120 in the region Z2'), so as to further improve the phenomenon of the display panel in the curved state, which has the uneven four corner frames.

Fig. 8 is a schematic top view of a display panel according to a third embodiment of the invention. Referring to fig. 8, the sealant pattern SP-C of the display panel 12 includes two first extending segments SPa-C and two second extending segments SPb-C. The main difference between the display panel 12 of the present embodiment and the display panel 10 of fig. 5 is: the frame glue patterns have different configurations. In the present embodiment, the connection portions 111A of the sealant pattern SP-C are connected between the protrusions 110A in an interval arrangement manner; similarly, the connecting portions 121A are connected between the protruding portions 120A in a spaced arrangement.

It is noted that length L13 of projection 110A located in region Z3 in direction D1 is less than length L12 of projection 110A located in region Z2 in direction D1, and length L14 of projection 110A located in region Z4 in direction D1 is less than length L13 of projection 110A located in region Z3 in direction D1. Accordingly, the distribution density of the protrusions 110A located in the region Z2 is greater than the distribution density of the protrusions 110A located in the region Z1, the distribution density of the protrusions 110A located in the region Z3 is greater than the distribution density of the protrusions 110A located in the region Z2, and the distribution density of the protrusions 110A located in the region Z4 is greater than the distribution density of the protrusions 110A located in the region Z3, thereby improving the display uniformity of the display panel 12 in the curved state. From another perspective, the first extension SPa-C of the sealant pattern SP-C includes a first portion, a second portion, a third portion and a fourth portion respectively located in the regions Z1, Z2, Z3 and Z4, the density of the fourth portion of the first extension SPa-C of the sealant pattern SP-C is greater than the density of the third portion of the first extension SPa-C of the sealant pattern SP-C, the density of the third portion of the first extension SPa-C of the sealant pattern SP-C is greater than the density of the second portion of the first extension SPa-C of the sealant pattern SP-C, and the density of the second portion of the first extension SPa-C of the sealant pattern SP-C is greater than the density of the first portion of the first extension SPa-C of the sealant pattern SP-C. Similarly, the length L22 of projection 120A in direction D2 at zone Z2 'is less than the length L21 of projection 120A in direction D2 at zone Z1'. It should be noted that, in the present embodiment, fig. 8 shows that the spacing S13 between two adjacent protrusions 110A in the region Z3 is smaller than the spacing S12 between two adjacent protrusions 110A in the region Z2, and the spacing S14 between two adjacent protrusions 110A in the region Z4 is smaller than the spacing S13, so as to further increase the distribution density difference of the protrusions 110A in different regions, but not limited thereto. In an alternative embodiment, the spacings S12, S13 may be equal to each other and/or the spacings S13, S14 may be equal to each other, or the spacing between two adjacent protrusions 110A decreases away from the bending axis SA 1.

In the present embodiment, the lengths of the protrusions 110A (or the protrusions 120A) in the arrangement direction are substantially the same, but the invention is not limited thereto. In the modified embodiment of the present embodiment, the lengths of the plurality of protrusions 110A located on one side of the bending axis SA1 in the direction D1 are all different, and the length of the protrusion 110A in the direction D1 is decreased in a direction away from the bending axis SA 1; similarly, the lengths of the plurality of protrusions 120A located on one side of the symmetry axis SA2 in the direction D2 are all different, and the lengths of the protrusions 120A in the direction D2 are decreased in a direction away from the symmetry axis SA 2.

On the other hand, in the embodiment, the connection portion 111A is disposed between the protrusion 110A and the display region DR, and the connection portion 121A is disposed between the protrusion 120A and the display region DR, but the invention is not limited thereto.

Fig. 9 is a schematic top view of a display panel according to a fourth embodiment of the present invention, and referring to fig. 9, a sealant pattern SP-D of the display panel 13 includes two first extending segments SPa-D and two second extending segments SPb-D. The difference between the display panel 13 in fig. 9 and the display panel 12 in fig. 8 is that the protrusion 110A in the sealant pattern SP-D in fig. 9 is disposed between the first connection portion 111A and the display region DR, and the protrusion 120A may also be disposed between the second connection portion 121A and the display region DR. The shape of the protruding

portions

110A and 120A in fig. 8 and 9 is a polygonal line. As shown in fig. 8 and 9, the protrusion 110A includes a segment parallel to the direction D1 and two segments parallel to the direction D2, and the protrusion 120A includes a segment parallel to the direction D2 and two segments parallel to the direction D1 to form a "u" shape, but the invention is not limited thereto. In other embodiments where the shape of the

projections

110A, 120A is a zigzag shape, the shape of the

projections

110A, 120A may be, for example, "Λ" shape, but the present invention does not limit the zigzag shape.

In summary, the display panel has a bending axis and a first region and a second region disposed on one side of the bending axis, and the first region is located between the bending axis and the second region, and the display panel includes a first substrate and a second substrate disposed opposite to each other, and a sealant pattern located between the first substrate and the second substrate. The sealant pattern includes a first extending section extending in a first direction, the first direction is not parallel to the extending direction of the bending axis, the first extending section includes a plurality of protrusions, one portion (also called a first portion of the plurality of protrusions) and another portion (also called a second portion of the plurality of protrusions) of the plurality of protrusions are respectively located in the first region and the second region, the first portion and the second portion of the plurality of protrusions respectively have a first distribution density and a second distribution density, and the second distribution density is greater than the first distribution density. From another perspective, a portion of the first extension (also referred to as a first portion of the first extension) is located in the first region and has a first density, and another portion of the second extension (also referred to as a second portion of the first extension) is located in the second region and has a second density, the second density being greater than the first density. By the configuration, the phenomenon of uneven peripheral images of the display panel in a bending state can be improved. For example, the first region and the second region may be a region closer to the bending axis SA1 and a region farther from the bending axis SA1 of the regions Z1, Z2, Z3, Z4, respectively. The first portion of the plurality of projections may include a first projection, the second portion of the plurality of projections may include a second projection, and a length of the first projection in the first direction is greater than a length of the second projection in the first direction such that the second distribution density is greater than the first distribution density. Furthermore, the another portion of the plurality of protrusions may further include a third protrusion, the third protrusion and the second protrusion being adjacent to each other, a distance between the third protrusion and the bending axis being greater than a distance between the second protrusion and the bending axis, a length of the third protrusion in the first direction being equal to a length of the second protrusion in the first direction (for example, lengths of two adjacent protrusions 110A in a region in the embodiment of fig. 8 in the direction D1 are equal to each other), or a length of the third protrusion in the first direction being less than a length of the second protrusion in the first direction (for example, lengths of two adjacent protrusions in the variation of the third embodiment in the direction D1 decrease in a direction away from the bending axis SA 1). The display panel may further have a symmetry axis, and a third region and a fourth region disposed at one side of the symmetry axis, and the sealant pattern further includes a second extension section. The symmetry axis is substantially parallel to the first direction, the third region is located between the symmetry axis and the fourth region, the second extending section extends in the second direction, the second direction is not parallel to the first direction, a portion and another portion of the second extending section (also referred to as the first portion and the second portion of the second extending section, respectively) are located in the third region and the fourth region, respectively, and the fourth portion of the second extending section includes at least one protrusion (for example, the second extending section SPb-C in the embodiment of fig. 8 has a protrusion 120A in the region Z2'), so as to further improve the phenomenon of the display panel in the curved state, which has the non-uniformity of the four corner frames.

Fig. 10 is a schematic top view of a display panel according to a fifth embodiment of the invention. Referring to fig. 10, the sealant pattern SP-E of the display panel 14 includes two first extending segments SPa-E and two second extending segments SPb-E. The main difference between the display panel 14 of the present embodiment and the display panel 12 of fig. 8 is: the frame glue patterns have different configurations. In the embodiment, the vertical projection of the connected protrusion 110B and the connection portion 111B (or the sealant pattern SP-E) on the first substrate 101 is a curve. In order to reduce the relative offset between the first substrate 101 and the second substrate 102 in the directions D1 and D2 to improve the display uniformity of the display panel 14 in the curved state, the spacing S13 between two adjacent protrusions 110B in the region Z3 is smaller than the spacing S12 between two adjacent protrusions 110B in the region Z2, the spacing S14 between two adjacent protrusions 110B in the region Z4 is smaller than the spacing S13, so that the distribution density of the protrusions 110B in the region Z2 is greater than that of the protrusions 110B in the region Z1, the distribution density of the protrusions 110B in the region Z3 is greater than that of the protrusions 110B in the region Z2, and the distribution density of the protrusions 110B in the region Z4 is greater than that of the protrusions 110B in the region Z3; similarly, the spacing S22 between two adjacent protrusions 120B in the region Z2 'is smaller than the spacing S21 between two adjacent protrusions 120B in the region Z1', and therefore the distribution density of the protrusions 120B in the region Z2 'is greater than the distribution density of the protrusions 120B in the region Z1'.

Fig. 11 is a schematic top view of a display panel according to a sixth embodiment of the invention, and referring to fig. 11, a sealant pattern SP-F of the display panel 15 includes two first extending segments SPa-F and two second extending segments SPb-F. In the embodiment, the first extension SPa-F of the sealant pattern SP-F has a plurality of protrusions 110C and a plurality of connecting portions 111C, and the protrusions 110C have a height H1, which is the length of the protrusions 110C in the direction D2. The first extension SPa-F of the paste pattern SP-F includes a first portion, a second portion, a third portion, and a fourth portion respectively located in the regions Z1, Z2, Z3, and Z4, a height of the protrusion 110C located in the region Z2 is greater than a height of the protrusion 110C located in the region Z1, a height of the protrusion 110C located in the region Z3 is greater than a height of the protrusion 110C located in the region Z2, and a height of the protrusion 110C located in the region Z4 is greater than a height of the protrusion 110C located in the region Z3. Therefore, the density of the fourth portion of the first extension SPa-F of the sealant pattern SP-F disposed in the region Z4 is greater than the density of the third portion of the first extension SPa-F of the sealant pattern SP-F disposed in the region Z3, the density of the third portion of the first extension SPa-F of the sealant pattern SP-F is greater than the density of the second portion of the first extension SPa-F of the sealant pattern SP-F disposed in the region Z2, and the density of the second portion of the first extension SPa-F of the sealant pattern SP-F is greater than the density of the first portion of the first extension SPa-F of the sealant pattern SP-F disposed in the region Z1. Accordingly, the shear stress formed between the first substrate 101 and the second substrate when the display panel is bent can be reduced, and the display uniformity of the display panel 15 in the bent state can be improved. In the embodiment, the second extension SPb-F of the sealant pattern SP-F has a plurality of protrusions 120C and a plurality of connecting portions 121C, and the protrusions 120C have a height H2, which is the length of the protrusions 120C in the direction D1. The height of the protrusion 120C in the region Z2 'is greater than the height of the protrusion 120C in the region Z1', so as to further improve the uneven four corner images of the display panel 15 in the bent state. In addition, in the modified embodiment, the heights of the plurality of protrusions 110C on the side of the bending axis SA1 in the sealant pattern SP-F are increased toward a direction away from the bending axis SA1 (e.g., the direction opposite to the direction D1 or the direction D1) and/or the heights of the plurality of protrusions 120C on the side of the symmetry axis SA2 in the sealant pattern SP-F are increased toward a direction away from the symmetry axis SA2 (e.g., the direction opposite to the direction D2 or the direction D2), so that the density of the first extension segments SPa-F of the sealant pattern SP-F is increased toward a direction away from the bending axis SA1 and/or the density of the second extension segments SPb-F of the sealant pattern SP-F is increased toward a direction away from the symmetry axis SA 2.

It is particularly noted that, in the embodiment, the configuration of the sealant pattern SP-F is similar to that of the embodiment of fig. 5, but not limited thereto. In other embodiments, the configuration of the sealant pattern may be similar to that of the sealant patterns shown in fig. 7 to 10, and the height adjustment manner of the protrusion is similar to that of this embodiment or the variation embodiments, which is not described herein again.

In summary, the display panel has a bending axis and a first region and a second region disposed on one side of the bending axis, and the first region is located between the bending axis and the second region, and the display panel includes a first substrate and a second substrate disposed opposite to each other, and a sealant pattern located between the first substrate and the second substrate. The sealant pattern includes a first extending section extending in a first direction, the first direction is not parallel to the extending direction of the bending axis, one part of the first extending section (also called as a first part of the first extending section) is located in the first region and has a first density, the other part of the second extending section (also called as a second part of the first extending section) is located in the second region and has a second density, the first extending section includes a first protruding portion and a second protruding portion, the first protruding portion and the second protruding portion are respectively located in the first region and the second region, and the height of the second protruding portion is greater than the height of the first protruding portion, so that the second density is greater than the first density, thereby improving the phenomenon of uneven peripheral picture of the display panel in the bending state. For example, the first region and the second region may be a region closer to the bending axis SA1 and a region farther from the bending axis SA1 of the regions Z1, Z2, Z3, Z4, respectively. The first extension segment may further include a third protrusion, the third protrusion and the second protrusion being adjacent to each other, a distance between the third protrusion and the bending axis being greater than a distance between the second protrusion and the bending axis, a height of the third protrusion being equal to a height of the second protrusion (e.g., heights of two adjacent protrusions 110C in a region in the embodiment of fig. 11 are equal to each other), or a height of the third protrusion being greater than a height of the second protrusion (e.g., heights of a plurality of protrusions 110C on a side of the bending axis SA1 in the variation of the sixth embodiment are increased in a direction away from the bending axis SA 1). The display panel may further have a symmetry axis, and a third region and a fourth region disposed at one side of the symmetry axis, and the sealant pattern further includes a second extension section. The symmetry axis is substantially parallel to the first direction, the third region is located between the symmetry axis and the fourth region, the second extending section extends in the second direction, the second direction is not parallel to the first direction, a portion and another portion of the second extending section (also referred to as the first portion and the second portion of the second extending section, respectively) are located in the third region and the fourth region, respectively, and the fourth portion of the second extending section includes at least one protrusion (for example, the second extending section SPb-C in the embodiment of fig. 8 has a protrusion 120A in the region Z2'), so as to further improve the phenomenon of the display panel in the curved state, which has the non-uniformity of the four corner frames.

In the above embodiments, the density of the sealant pattern in different areas can be adjusted by adjusting the distribution density of the protrusions (e.g., adjusting the distance between two adjacent protrusions and/or adjusting the length of the protrusions), and/or adjusting the height of the protrusions, but the invention is not limited thereto. For example, the total area of the line segments of the protrusion portion may be increased by increasing the total area of the line segments of the protrusion portion, for example, by bending or bending the line segments of the protrusion portion for multiple times, so as to increase the density of the sealant pattern, which is not described herein again.

In view of the above, the display panel according to an embodiment of the invention has the sealant pattern sandwiched between the two substrates. The density of the frame glue pattern in the region far away from the bending axis is greater than that of the frame glue pattern in the region near the bending axis, so that the shearing stress formed between the two substrates when the display panel is bent can be reduced, and the display uniformity of the display panel in a bent state can be 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

1. A display panel having a bending axis and a first region and a second region disposed at one side of the bending axis, the first region being located between the bending axis and the second region, the display panel comprising:

a first substrate having a display region and a peripheral region;

a second substrate disposed opposite to the first substrate; and

and a sealant pattern disposed in the peripheral region and between the first substrate and the second substrate, wherein the sealant pattern includes a first extension section extending in a first direction, the first direction is not parallel to the extending direction of the bending axis, the first extension section includes a plurality of protrusions, a portion of the plurality of protrusions is located in the first region and has a first distribution density, another portion of the plurality of protrusions is located in the second region and has a second distribution density, and the second distribution density is greater than the first distribution density.

2. The display panel according to claim 1, wherein the part of the plurality of convex portions includes a first convex portion and a second convex portion adjacent to each other, the other part of the plurality of convex portions includes a third convex portion and a fourth convex portion adjacent to each other, and a distance between the first convex portion and the second convex portion is larger than a distance between the third convex portion and the fourth convex portion.

3. The display panel according to claim 2, wherein the another portion of the plurality of convex portions further comprises a fifth convex portion, wherein the fifth convex portion and the fourth convex portion are adjacent to each other, and wherein a distance between the fifth convex portion and the fourth convex portion is equal to or smaller than a distance between the third convex portion and the fourth convex portion.

4. The display panel according to claim 1, wherein the part of the plurality of projections includes a first projection, the other part of the plurality of projections includes a second projection, and a length of the first projection in the first direction is larger than a length of the second projection in the first direction.

5. The display panel according to claim 4, wherein the another portion of the plurality of convex portions further comprises a third convex portion, the third convex portion and the second convex portion are adjacent to each other, a distance between the third convex portion and the bending axis is larger than a distance between the second convex portion and the bending axis, and a length of the third convex portion in the first direction is equal to or smaller than a length of the second convex portion in the first direction.

6. A display panel having a bending axis and a first region and a second region disposed at one side of the bending axis, the first region being located between the bending axis and the second region, the display panel comprising:

a first substrate having a display region and a peripheral region;

a second substrate disposed opposite to the first substrate; and

and the frame glue pattern is arranged in the peripheral area and positioned between the first substrate and the second substrate, the frame glue pattern comprises a first extension section, the first extension section extends in a first direction, the first direction is not parallel to the extension direction of the bending shaft, the first extension section comprises a first protruding part and a second protruding part, the first protruding part and the second protruding part are respectively positioned in the first area and the second area, and the height of the second protruding part is greater than that of the first protruding part.

7. The display panel according to claim 6, wherein the first extension further comprises a third protrusion, the third protrusion and the second protrusion are adjacent to each other, a distance between the third protrusion and the bending axis is greater than a distance between the second protrusion and the bending axis, and a height of the third protrusion is equal to or greater than a height of the second protrusion.

8. The display panel according to claim 2, 4, or 6, wherein each of the first protruding portion and the second protruding portion has a shape of a broken line, a curved line, or a combination thereof.

9. The display panel according to claim 1 or 6, wherein the display panel further has a symmetry axis and a third region and a fourth region disposed at one side of the symmetry axis, and the sealant pattern further includes a second extending section, wherein the symmetry axis is substantially parallel to the first direction, the third region is located between the symmetry axis and the fourth region, the second extending section extends in a second direction, the second direction is not parallel to the first direction, a portion and another portion of the second extending section are respectively located in the third region and the fourth region, and the another portion of the second extending section includes at least one protrusion.

10. A display panel having a bending axis and a first region and a second region disposed at one side of the bending axis, the first region being located between the bending axis and the second region, the display panel comprising:

a first substrate having a display region and a peripheral region;

a second substrate disposed opposite to the first substrate; and

and a sealant pattern disposed in the peripheral region and between the first substrate and the second substrate, wherein the sealant pattern includes a first extension section extending in a first direction, the first direction is not parallel to the extending direction of the bending axis, a portion of the first extension section is disposed in the first region and has a first density, another portion of the first extension section is disposed in the second region and has a second density, and the second density is greater than the first density.