CN109671355B

CN109671355B - Display panel and display device

Info

Publication number: CN109671355B
Application number: CN201811598130.4A
Authority: CN
Inventors: 王俊强; 饶元元; 王亚男
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2021-02-26
Anticipated expiration: 2038-12-26
Also published as: CN109671355A

Abstract

The embodiment of the invention provides a display panel and a display device, wherein at least one bending detection unit is arranged in a non-display area and arranged along a first direction, and the bending detection unit is arranged to realize detection of different bending positions and different bending angles, so that the range of the detectable bending angles is enlarged, and the detection of the bending positions is realized. In addition, the bending detection unit is arranged in the non-display area, so that the influence on the display of the display panel is avoided.

Description

Display panel and display device

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

With the development of display technology, flexible display panels are applied more and more widely. The flexible display panel has excellent bending performance, and comprises a bending shaft, and the flexible display panel can be bent along the bending shaft. When the flexible display panel is bent, the flexible display panel needs to be bent for detection.

In the bending detection mode in the prior art, bending can be detected only when the bending angle of the flexible display panel is close to 180 degrees, the range of the bending angle which can be detected is small, and the bending position cannot be detected.

[ summary of the invention ]

In view of this, embodiments of the present invention provide a display panel and a display device, where at least one bending detection unit is disposed in a non-display area, and the at least one bending detection unit is disposed along a first direction, and the bending detection unit is disposed to detect different bending positions and different bending angles, so as to increase a range of detectable bending angles and detect the bending positions.

In one aspect, an embodiment of the present invention provides a display panel, where the display panel includes a bending region and a bending axis, and the display panel can be bent along the bending axis;

the display panel comprises a display area, a non-display area surrounding the display area and at least one bending detection unit, wherein the bending detection unit is positioned in the non-display area; the at least one bending detection unit is arranged along a first direction, and the areas of at least two different positions of the pattern corresponding to the at least one bending detection unit are different, wherein the first direction is perpendicular to the extending direction of the bending region.

Optionally, the display panel further comprises a buffer layer covering the display region and the non-display region;

the non-display area comprises a first non-display area and a second non-display area which are oppositely arranged, the first non-display area and the second non-display area are positioned on two sides of the display area, and the first non-display area and the second non-display area are arranged along the first direction;

the bending detection unit is a capacitance detection unit, the capacitance detection unit comprises a first electrode, a dielectric layer and a second electrode, and the dielectric layer is positioned between the first electrode and the second electrode;

wherein the buffer layer is multiplexed as the dielectric layer in the non-display region.

Optionally, along the first direction, the area of the electrode pattern corresponding to the first electrode and/or the second electrode gradually increases or gradually decreases.

Optionally, the areas of the electrode patterns corresponding to the first electrode and/or the second electrode are gradually increased or gradually decreased in an equal difference value or in an equal proportion; alternatively, the first and second electrodes may be,

the area of the electrode pattern corresponding to the first electrode and/or the second electrode is gradually increased or gradually decreased in a gradual change manner.

Optionally, the first electrode includes a plurality of sequentially connected first sub-electrodes, and the second electrode includes a plurality of sequentially connected second sub-electrodes;

along the first direction, the area of the electrode pattern corresponding to the first sub-electrode and/or the second sub-electrode gradually increases or gradually decreases.

Optionally, the areas of the electrode patterns corresponding to the first sub-electrodes and/or the second sub-electrodes are gradually increased or gradually decreased in an equal difference value or in an equal proportion; alternatively, the first and second electrodes may be,

the area of the electrode pattern corresponding to the first sub-electrode and/or the second sub-electrode gradually increases or gradually decreases in a gradual manner.

Optionally, the number of the bending detection units is two, the two bending detection units are arranged oppositely, and the two bending detection units are respectively located in the first non-display area and the second non-display area.

Optionally, the sum of the relative areas of any two opposite regions of the two bending detection units is equal.

Optionally, the number of the bending detection units is multiple, and the multiple bending detection units are located in the first non-display area and/or the second non-display area.

Optionally, the plurality of bending detection units located in the first non-display area and the plurality of bending detection units located in the second non-display area are arranged in a one-to-one correspondence manner, and the sum of the relative areas of any two corresponding bending detection units is equal.

Optionally, the shape of the cross section of the electrode pattern includes one or any combination of a rectangle, a triangle, a trapezoid, a diamond, a circle, a curve, and a dog-leg.

Optionally, the first electrode and the gate layer are disposed in the same layer, and the second electrode and the source/drain layer are disposed in the same layer.

In another aspect, an embodiment of the present invention provides a display device, which includes the above display panel.

According to the display panel and the display device provided by the embodiment of the invention, at least one bending detection unit is arranged in the non-display area and arranged along the first direction, and the bending detection units are arranged to realize detection of different bending positions and different bending angles, so that the range of the detectable bending angles is enlarged, and the detection of the bending positions is realized.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

FIG. 2 is a schematic cross-sectional view taken along line A1-A2 of FIG. 1;

FIG. 3 is a schematic plan view of the second electrode;

FIG. 4 is a schematic view of an electrode pattern;

FIG. 5 is yet another schematic view of an electrode pattern;

FIG. 6 is yet another schematic diagram of an electrode pattern;

FIG. 7 is yet another schematic view of an electrode pattern;

FIG. 8 is a schematic diagram illustrating a bending state of the bending detection unit in FIG. 2;

fig. 9 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 10 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 11 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 12 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 13 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention;

fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.

It should be understood that although the terms first, second, third, etc. may be used to describe the electrodes in embodiments of the present invention, the electrodes should not be limited to these terms. These terms are only used to distinguish the electrodes from each other. For example, a first electrode may also be referred to as a second electrode, and similarly, a second electrode may also be referred to as a first electrode, without departing from the scope of embodiments of the present invention.

Through intensive research, the inventors of the present invention have shown fig. 1 to 14, in which fig. 1 is a schematic structural view of a display panel according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view taken along line A1-A2 of FIG. 1; FIG. 3 is a schematic plan view of the second electrode; FIG. 4 is a schematic view of an electrode pattern; FIG. 5 is yet another schematic view of an electrode pattern; FIG. 6 is yet another schematic diagram of an electrode pattern; FIG. 7 is yet another schematic view of an electrode pattern; FIG. 8 is a schematic diagram illustrating a bending state of the bending detection unit in FIG. 2; fig. 9 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention; fig. 10 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention; fig. 11 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention; fig. 12 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention; fig. 13 is a schematic structural diagram of a display panel according to yet another embodiment of the present invention; fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention. The embodiment of the invention provides a display panel and a display device, wherein at least one bending detection unit is arranged in a non-display area, the areas of at least two different positions of a pattern corresponding to the at least one bending detection unit are different, and the bending detection unit is arranged to realize the detection of different bending positions and different bending angles, so that the range of the detectable bending angles is enlarged, and the detection of the bending positions is realized.

In the related art, the current flexible display product is to provide a bending detection unit in a display area of a flexible display panel, and specifically, the bending detection unit may be symmetrically provided in the display area on both sides of a bending axis of the flexible display panel. However, in such an arrangement, the bending angle of the flexible display panel can be detected only when the bending angle is close to 180 degrees, so that the range of the detectable bending angle is small, and the bending position cannot be detected. To this end, an embodiment of the present invention provides a display panel 100, as shown in fig. 1 and fig. 2, the display panel 100 includes a bending region 101 and a bending axis 102, and the display panel 100 can be bent along the bending axis 102. The display panel 100 includes a display area 103, a non-display area 104 surrounding the display area 103, and at least one bending detection unit 11, wherein the bending detection unit 11 is located in the non-display area 104; the at least one bending detection unit 11 is disposed along a first direction B1-B2, and areas of at least two different positions of the corresponding pattern of the at least one bending detection unit 11 are different, wherein the first direction B1-B2 is perpendicular to the extending direction of the bending region 101.

In the embodiment of the invention, the first direction B1-B2 may be set as a direction from one end of the display panel 100 to the other end of the display panel in FIG. 1, wherein one end is an upper end and the other end is a lower end.

In the embodiment of the present invention, the extending direction of the bending region 101 is parallel to the extending direction of the bending axis 102, and the first direction B1-B2 is also perpendicular to the extending direction of the bending axis 102. When the display panel 100 is bent along the bending axis 102, the display panel 100 is bent in the bending region 101. The bending region 101 is a region where the display panel 100 can be bent at different angles along the direction of the bending axis 102. The bending axis 102 may be located at different positions of the display panel 101 in the first direction B1-B2, so that the display panel 100 may be bent along the bending region 101 at different positions. Fig. 1 illustrates an example in which the bending axis 102 is located at one position of the display panel 100, but the position of the bending axis 102 in the embodiment of the present invention is not limited thereto.

In the embodiment of the present invention, the display panel 100 can be folded toward one side of the display screen of the display panel 100, i.e. folded inward; but also can be bent, i.e., "folded out," toward the side of the display screen facing away from the display panel 100.

In the embodiment of the present invention, the bending axis 102 is a virtual bending axis, the bending region 101 is disposed corresponding to a portion of the display region 103 and a portion of the non-display region 104, and the portion of the display region 103 corresponding to the bending region 101 is disposed with the light emitting unit, so that the portion of the display region 103 corresponding to the bending region 101 can normally display the image.

In the embodiment of the present invention, to ensure that the display panel can realize the bending states at different angles and different positions, the display panel 100 is a flexible display panel, for example, the display panel 100 may be a flexible Organic Light-Emitting Diode (oled) display panel. To ensure that the display panel 100 is a flexible display panel, the display panel 100 uses a flexible substrate.

In the embodiment of the present invention, the non-display area 104 is disposed around the display area 103, as shown in fig. 1, the display area 103 is located in the middle of the display panel 100, the display area 103 has four sides, and the non-display area 104 is disposed outside each of the four sides. Specifically, the non-display region 104 includes a first non-display region 1041 and a second non-display region 1042 disposed opposite to each other, the first non-display region 1041 and the second non-display region 1042 are located at two sides of the display region 103, and the first non-display region 1041 and the second non-display region 1042 are disposed along a first direction B1-B2. In fig. 1, the first non-display area 1041 is located on the left side of the display area 103, and the first non-display area 1041 is an area on the left side of the display area 103; the second non-display region 1042 is located at the right side of the display region 103, and the second non-display region 1042 is a region at the right side of the display region 103. Accordingly, the non-display region 104 further includes a third non-display region located on the upper side of the display region 103 and a fourth non-display region located on the lower side of the display region 103, the third non-display region and the fourth non-display region being disposed along the extending direction of the bending region 101, wherein the third non-display region and the fourth non-display region are not described in detail.

In the embodiment of the present invention, as shown in fig. 2, the bending detection unit 11 is a capacitance detection unit, the capacitance detection unit includes a first electrode 111, a dielectric layer 112 and a second electrode 113, and the dielectric layer 112 is located between the first electrode 111 and the second electrode 113.

As shown in fig. 2, the display panel 100 may further include a buffer layer covering the display region 103 and the non-display region 104, wherein the buffer layer is reused as the dielectric layer 112 in the non-display region 104, the buffer layer may be an organic material layer, and the buffer layer in the display panel 100 is reused as the dielectric layer 112, so that the dielectric layer 112 is not required to be separately manufactured, thereby simplifying the manufacturing process and effectively reducing the material cost. Of course, in practical applications, the dielectric layer 112 may be separately disposed in the non-display region 104 according to the design requirements of the product, and is not limited in this respect.

In the embodiment of the present invention, the display panel 100 further includes a plurality of thin film transistors in the display area 103, and the thin film transistors are used in the pixel driving circuits in the display area, and are used as driving transistors, switching control transistors, and the like. The thin film transistor comprises a gate layer, an active layer and a source drain layer, wherein the gate layer and the source drain layer are made of metal, and the thin film transistor is not specifically shown in the figure. In the embodiment of the invention, the first electrode 111 and the gate layer are arranged in the same layer, and the second electrode 113 and the source drain layer are arranged in the same layer, which can be realized in the same process by adopting the same material, and the first electrode 111 and the second electrode 113 do not need to be manufactured separately, so that the process manufacturing process is simplified, and the material cost is effectively reduced. Of course, in practical applications, the first electrode 111 and the second electrode 113 may also be disposed in the same layer as other structures in the display area 103, or the first electrode 111 and the second electrode 113 may also be disposed in the non-display area 104 separately, according to the design requirements of the product, and are not limited herein.

In the embodiment of the present invention, the number of the bending detection units 11 is two, the two bending detection units 11 are disposed opposite to each other, and the two bending detection units 11 are respectively located in the first non-display region 1041 and the second non-display region 1042. For each of the bending detection units 11, the area of the electrode pattern corresponding to the first electrode 111 and/or the second electrode 113 is gradually increased or gradually decreased along the first direction B1-B2. As shown in fig. 1, in the bending detection unit 11 located in the first non-display region 1041, the areas of the electrode patterns corresponding to the first electrode 111 and the second electrode 113 are gradually increased; in the bending detection unit 11 located in the second non-display region 1042, the areas of the electrode patterns corresponding to the

second electrodes

111 and 113 are gradually decreased. In practical applications, only the area of the electrode pattern corresponding to the first electrode 111 may be set to be gradually increased or gradually decreased, or only the area of the electrode pattern corresponding to the second electrode 113 may be set to be gradually increased or gradually decreased, and is not particularly limited herein. As long as it can ensure that the relative area between the first electrode 111 and the second electrode 113 gradually increases or gradually decreases.

In the embodiment of the present invention, the areas of the electrode patterns corresponding to the first electrode 111 and/or the second electrode 113 are gradually increased or gradually decreased in an equal difference or in an equal proportion. Wherein, the equal difference means that the difference between the areas of any adjacent electrode patterns along the first direction B1-B2 is equal, and the equal proportion means that the proportion between the areas of any adjacent electrode patterns along the first direction B1-B2 is equal. Alternatively, in practical applications, the area of the electrode pattern corresponding to the first electrode 111 and/or the second electrode 113 gradually increases or gradually decreases in a gradual manner, and this situation is not specifically shown.

In the embodiment of the present invention, the shapes and areas of the electrode patterns corresponding to the first electrode 111 and the second electrode 113 are the same, and the first electrode 111 and the second electrode 113 are disposed opposite to each other. That is, the first electrode 111 and the second electrode 113 are two identical electrodes. It should be noted that: since the second electrode 113 is located above the first electrode 111 in fig. 2, the bending detection unit 11 in fig. 1 shows only the second electrode.

As shown in fig. 3, the first electrode includes a plurality of sequentially connected first sub-electrodes, and the second electrode 113 includes a plurality of sequentially connected second sub-electrodes 1131. Wherein the plurality of second sub-electrodes 1131 may be connected by the connection portion 1132. Along the first direction B1-B2, the area of the electrode pattern corresponding to the first sub-electrode and/or the second sub-electrode 1131 gradually increases or gradually decreases. Shown in fig. 3 are: the area of the electrode pattern corresponding to the second sub-electrode 1131 in the second electrode 113 located in the second non-display region 1042 is gradually decreased. In fig. 1, the area of the electrode pattern corresponding to the second sub-electrode in the second electrode located in the first non-display region 1041 gradually increases. It should be noted that: the electrode pattern corresponding to the first sub-electrode of the first electrode may be the same as the electrode pattern of the second sub-electrode, so the illustration of the first sub-electrode can be referred to the second sub-electrode in fig. 3, and is not specifically drawn here.

In the embodiment of the invention, the areas of the electrode patterns corresponding to the first sub-electrodes and/or the second sub-electrodes are gradually increased or gradually decreased in an equal difference value or in an equal proportion. As shown in FIG. 3, the electrode patterns corresponding to the second sub-electrodes 1131 may be gradually decreased in an equal difference or an equal proportion along the first direction B1-B2. And in the first non-display region 1041, the electrode patterns corresponding to the second sub-electrodes 1131 may gradually increase in an equal difference value or in an equal proportion along the first direction B1-B2. Alternatively, in practical applications, the area of the electrode pattern corresponding to the first sub-electrode and/or the second sub-electrode 113 gradually increases or gradually decreases in a gradual manner, and this situation is not specifically shown.

In the embodiment of the present invention, the sum of the relative areas of any two opposite regions of the two bending detection units 11 is equal. Specifically, the sum of the relative areas of any first sub-electrode and any second sub-electrode in one bending detection unit 11 and the relative areas of the first sub-electrode and any second sub-electrode in the other bending detection unit 11 at the relative positions are equal. As shown in fig. 1 and 3, for example, the bend detection unit 11 located in the first non-display region 1041 may include 7 second sub-electrodes 1131 and corresponding 7 first sub-electrodes, the bend detection unit 11 located in the second non-display region 1041 may include 7 second sub-electrodes 1131 and corresponding 7 first sub-electrodes, and along the first direction B1-B2, the sum of the relative areas of the 1 st second sub-electrode 1131 (located uppermost) and the corresponding first sub-electrode in the first non-display region 1041 and the relative area of the 1 st second sub-electrode 1131 (located uppermost) and the corresponding first sub-electrode in the second non-display region 1042 is the sum of the first relative areas, the relative area of the 2 nd second sub-electrode 1131 and the corresponding first sub-electrode in the first non-display region 1041 and the relative area of the 2 nd second sub-electrode 1131 and the corresponding first sub-electrode in the second non-display region 1042 are the sum of the second relative areas, wherein the sum of the first relative area is equal to the sum of the second relative area, and so on, the sums of the 7 relative areas are all equal.

In an embodiment of the present invention, the shape of the cross section of the electrode pattern includes one or any combination of a rectangle, a triangle, a trapezoid, a diamond, a circle, a curve, and a dog-leg. As shown in fig. 1 and 3, the cross-sectional shapes of the electrode pattern corresponding to the first sub-electrode and the electrode pattern corresponding to the second sub-electrode 1131 are both rectangular. As shown in fig. 4 to 7, for example, the cross-section of the electrode pattern corresponding to the first sub-electrode may also have a triangular shape (as shown in fig. 4), a trapezoidal shape (as shown in fig. 5), a polygonal line shape (as shown in fig. 6), or a combination of a rectangular shape and a polygonal line shape (as shown in fig. 7); accordingly, the cross-sectional shape of the electrode pattern corresponding to the second sub-electrode 1131 may also be a triangle (as shown in fig. 4), a trapezoid (as shown in fig. 5), a zigzag (as shown in fig. 6), or a combination of a rectangle and a zigzag (as shown in fig. 7). However, in the embodiment of the present invention, the shape of the electrode pattern is not limited to this, and other shapes may be adopted, which are not listed here.

In the embodiment of the present invention, the first electrode 111 and the second electrode 113 may be made of metal, and the first electrode 111 and the second electrode 113 have the structure in the embodiment, so that the electrode has strong bending resistance, and the shape of the electrode is substantially unchanged after being bent for multiple times, thereby ensuring the stability of bending detection. When the cross-sectional shape of the electrode pattern is a zigzag shape (as shown in fig. 6) or a combination of a rectangular shape and a zigzag shape (as shown in fig. 7), the ductility of the metal can be enhanced, and thus the bending life of the metal can be extended.

In an embodiment of the present invention, the first electrode 111 may be a driving electrode, and the second electrode 113 may be a receiving electrode. Of course, the first electrode 111 may also be a receiving electrode, and the second electrode 113 may also be a driving electrode. In the embodiment of the present invention, as shown in fig. 1 and fig. 2, the display panel 100 further includes a control chip 12, and both the first electrode 111 and the second electrode 113 of the bending detection unit 11 are electrically connected to the control chip 12. The control chip 12 sends a driving signal to the first electrode 111 and obtains a corresponding detection signal from the second electrode 113, and the control chip 12 can obtain the charge amount of the bending detection unit 11 according to the detection signal. When the display panel is bent, the magnitude of the detection signal changes, and the charge amount of the bending detection unit 11 also changes.

As shown in fig. 8, when the display panel 100 is bent, the first electrode 111 and the second electrode 113 in the bending detection unit 11 are deformed, and the relative area between the first electrode 111 and the second electrode 113 is changed due to the different deformation of the first electrode 111 and the second electrode 113, so that the charge amount of the bending detection unit 11 is changed.

In the embodiment of the present invention, since the sum of the relative areas of any two opposite regions of the two bending detection units 11 is equal, and the areas of different positions of the patterns corresponding to the two bending detection units 11 are different, the charge amounts of any two opposite regions of the two bending detection units 11 have a certain ratio. When the display panel 100 is bent, since the deformation amounts of the first electrode 111 and the second electrode 113 of the opposite regions of the two bending detection units 11 are different, the change of the relative area of the opposite regions of the two bending detection units 11 is different, and therefore the change of the charge amount of the opposite regions of the two bending detection units 11 is different, so that the ratio between the charge amounts of the opposite regions of the two bending detection units 11 is changed, and the position where the bending operation occurs and/or the bending angle of the display panel 100 is determined according to the ratio of the changed charge amounts. Specifically, a region where the proportion of the amount of charge changes may be determined as the bending region 101, thereby determining the position of the bending operation; the bending angle may be determined according to the magnitude of the change in the proportion of the amount of charge, and the larger the change in the proportion of the amount of charge, the larger the bending angle, and the smaller the change in the proportion of the amount of charge.

For example, as shown in fig. 1 and fig. 3, when the display panel 100 is bent along the bending axis 102, the relative areas of the 2 nd second sub-electrode 1131 in the first non-display region 1041 and the corresponding first sub-electrode change, and the relative areas of the 2 nd second sub-electrode 1131 in the second non-display region 1042 and the corresponding first sub-electrode also change, and because the two relative areas change differently, the change in the charge amount of the bent relative region in the first non-display region 1041 and the second non-display region 1042 also differs, so that the ratio between the charge amounts of the bent relative region in the first non-display region 1041 and the second non-display region 1042 changes, and the position where the bending operation occurs and/or the bending angle of the display panel 100 are determined according to the ratio of the changed charge amounts.

In the embodiment of the invention, the non-display areas at two sides of the display area are respectively provided with the bending detection unit, the areas of different positions of the patterns corresponding to the bending detection units are different, and the bending detection units are arranged to realize the detection of different bending positions and different bending angles, so that the range of the detectable bending angles is enlarged, and the detection of the bending positions is realized. The bending detection unit is arranged in the non-display area, so that the influence on the display of the display panel is avoided. And the non-display areas on two sides of the display area are respectively provided with a bending detection unit, and the bending operation position and/or the bending angle of the display panel are determined according to the proportion of the changed electric charge quantity, so that the detection precision of bending detection is improved.

As shown in fig. 9, the present embodiment is different from the embodiment in fig. 8 in that: the number of the bending detection units 11 is plural, and the plural bending detection units 11 are located in the first non-display region 1041 and the second non-display region 1042. The plurality of bending detection units 11 located in the first non-display region 1041 and the plurality of bending detection units 11 located in the second non-display region 1042 are arranged in a one-to-one correspondence, and the sum of the relative areas of any two corresponding bending detection units 11 is equal.

As shown in fig. 9, in the first non-display region 1041, the number of the bending detection units 11 is 7; in the second non-display region 1042, the number of bend detection units 11 is 7. The 7 bending detection units 11 in the first non-display region 1041 and the 7 bending detection units 11 in the second non-display region 1042 are arranged in a one-to-one correspondence manner. The specific structure of each bending detection unit 11 can be seen in fig. 2. In the first non-display region 1041, the areas of the electrode patterns corresponding to the first electrodes 111 and the second electrodes 113 of the plurality of bend detection cells 11 are gradually increased along the first direction B1-B2; in the second non-display region 1042, the areas of the electrode patterns corresponding to the first electrodes 111 and the second electrodes 113 of the plurality of bend detection cells 11 are gradually decreased along the first direction B1-B2. The areas of the electrode patterns corresponding to the first electrodes 111 and the second electrodes 113 are gradually increased or decreased in an equal difference or in an equal proportion.

In this embodiment, as shown in fig. 9, for example, along the first direction B1-B2, the sum of the relative area of the 1 st bend detecting cell 11 (located at the top) of the first non-display region 1041 and the relative area of the 1 st bend detecting cell 11 (located at the top) of the second non-display region 1042 is the sum of the first relative areas, the sum of the relative area of the 2 nd bend detecting cell 11 of the first non-display region 1041 and the relative area of the 2 nd bend detecting cell 11 of the second non-display region 1042 is the sum of the second relative areas, wherein the sum of the first relative areas is equal to the sum of the second relative areas, and so on, the sums of the 7 relative areas are equal. Wherein, the relative area of each bending detection unit 11 is the relative area of the second electrode and the corresponding first electrode.

In this embodiment, as shown in fig. 9, the cross-section of each of the electrode patterns corresponding to the first electrode and the electrode patterns corresponding to the second electrode of each of the bending detection units 11 is rectangular. As shown in fig. 4 to 7, for example, the cross-section of the electrode pattern corresponding to the first electrode of each bending detection unit 11 may also be triangular (as shown in fig. 4), trapezoidal (as shown in fig. 5), polygonal (as shown in fig. 6), or a combination of rectangular and polygonal (as shown in fig. 7); accordingly, the cross-section of the electrode pattern corresponding to the second electrode of each bending detection unit 11 may also have a triangular shape (as shown in fig. 4), a trapezoidal shape (as shown in fig. 5), a polygonal shape (as shown in fig. 6), or a combination of a rectangular shape and a polygonal shape (as shown in fig. 7). However, in the embodiment of the present invention, the shape of the electrode pattern is not limited to this, and other shapes may be adopted, which are not listed here.

For example, as shown in fig. 9, when the display panel 100 is bent along the bending axis 102, the relative area between the 3 rd second electrode in the first non-display region 1041 and the corresponding first electrode changes, and the relative area between the 3 rd second electrode in the second non-display region 1042 and the corresponding first electrode also changes, and the change of the two relative areas is different, so that the change of the charge amount of the bent relative region in the first non-display region 1041 and the second non-display region 1042 is also different, so that the ratio between the charge amounts of the bent relative region in the first non-display region 1041 and the second non-display region 1042 changes, and the position where the bending operation occurs and/or the bending angle of the display panel 100 are determined according to the ratio of the changed charge amounts.

In this embodiment, the first electrode and the second electrode of each bending detection unit 11 are electrically connected to the control chip 12 individually, so that the bending detection accuracy is improved.

As shown in fig. 10, the present embodiment is different from the embodiment in fig. 8 in that: the number of the bending detection units 11 is plural, and the plural bending detection units 11 are located in the first non-display region 1041 and the second non-display region 1042. The plurality of bending detection units 11 located in the first non-display region 1041 and the plurality of bending detection units 11 located in the second non-display region 1042 are arranged in a one-to-one correspondence, and the sum of the relative areas of any two corresponding bending detection units 11 is equal.

As shown in fig. 10, in the first non-display region 1041, the number of the bending detection units 11 is 3; in the second non-display region 1042, the number of bend detection units 11 is 3. The 3 bending detection units 11 in the first non-display region 1041 and the 3 bending detection units 11 in the second non-display region 1042 are arranged in a one-to-one correspondence manner.

The specific structure of each bending detection unit 11 can be seen in fig. 2. In the first non-display region 1041, the areas of the electrode patterns corresponding to the first electrodes 111 and the second electrodes 113 of the plurality of bend detection cells 11 are gradually increased along the first direction B1-B2; in the second non-display region 1042, the areas of the electrode patterns corresponding to the first electrodes 111 and the second electrodes 113 of the plurality of bend detection cells 11 are gradually decreased along the first direction B1-B2. The areas of the electrode patterns corresponding to the first electrodes 111 and the second electrodes 113 are gradually increased or decreased in an equal difference or in an equal proportion.

In this embodiment, the first electrode of each bending detection unit 11 includes a plurality of sequentially connected first sub-electrodes, and the second electrode includes a plurality of sequentially connected second sub-electrodes. In the present embodiment, the structure of each bending detection unit 11 is the same as the structure of the bending detection unit 11 of the embodiment in fig. 8, and the difference is only that the present embodiment and each bending detection unit 11 in fig. 8 include different numbers of first sub-electrodes and second sub-electrodes, so the description of each bending detection unit 11 can be referred to the description of the embodiment in fig. 8, and the description is not repeated here.

In this embodiment, respectively set up a plurality of detecting element of buckling in the non-display area of display area both sides, and all set up a plurality of first sub-electrodes and a plurality of second sub-electrode in every detecting element of buckling to be convenient for realize multiaxis and buckle and detect, and improved and detected the precision.

In this embodiment of the present invention, the bending detection unit 11 may be disposed only in the first non-display region 1041 or the second non-display region 1042. When the display panel 100 is bent along the bending axis 102, the deformation amount of the first electrode and the second electrode of the bending region of the bending detection unit 11 is different, so that the relative area of the bending region of the bending detection unit 11 is changed, and therefore the charge amount of the bending region of the bending detection unit 11 is also changed, and the position where the bending operation is performed and/or the bending angle of the display panel 100 is determined according to the changed charge amount. Specifically, a region where the amount of charge changes may be determined as the bending region 101, thereby determining the position of the bending operation; the bending angle can be determined according to the change of the charge quantity, the bending angle is larger when the change of the charge quantity is larger, and the bending angle is smaller when the change of the charge quantity is smaller.

In the embodiment of the invention, the bending detection unit is arranged in the non-display area on one side of the display area, the areas of different positions of the patterns corresponding to the bending detection unit are different, and the bending detection unit is arranged to realize the detection of different bending positions and different bending angles, so that the range of the detectable bending angles is enlarged, and the detection of the bending positions is realized. The bending detection unit is arranged in the non-display area, so that the influence on the display of the display panel is avoided.

As shown in fig. 11, the present embodiment is different from the embodiment in fig. 8 in that: the number of the bending detection units 11 is one, and the bending detection units 11 are located in the second non-display region 1042. The description of the bending detection unit 11 can be referred to the embodiment in fig. 8, and the description is not repeated here.

As shown in fig. 12, the present embodiment is different from the embodiment in fig. 9 in that: the number of the bending detection units 11 is plural, and the plural bending detection units 11 are located in the first non-display area 1041. The description of the bending detection unit 11 can be referred to the embodiment in fig. 9, and the description is not repeated here.

As shown in fig. 13, the present embodiment is different from the embodiment in fig. 10 in that: the number of the bending detection units 11 is plural, and the plural bending detection units 11 are located in the second non-display region 1042. The description of the bending detection unit 11 can be referred to the embodiment in fig. 10, and the description is not repeated here.

In the embodiments of fig. 11 to 13, the bending detection can be realized by only using one bending detection unit 11, so that the space occupied by the bending detection unit 11 in the display panel is reduced, the bending detection structure is simplified, and the material cost is reduced.

An embodiment of the present invention further provides a display device, as shown in fig. 14, including the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 14 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.

The display device provided by the embodiment of the invention comprises the display panel, so that at least one bending detection unit is arranged in a non-display area by adopting the display device, the areas of at least two different positions of the pattern corresponding to the at least one bending detection unit are different, and the detection of different bending positions and different bending angles is realized by arranging the bending detection unit, so that the range of the detectable bending angles is enlarged, and the detection of the bending positions is realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A display panel is characterized by comprising a bending area and a bending shaft, wherein the display panel can be bent along the bending shaft;

the display panel comprises a display area and a non-display area surrounding the display area; the non-display area comprises a first non-display area and a second non-display area which are oppositely arranged, the first non-display area and the second non-display area are positioned on two sides of the display area, and the first non-display area and the second non-display area are arranged along a first direction;

the first non-display area and the second non-display area are both provided with at least one bending detection unit; the bending detection unit is arranged along a first direction, and the areas of at least two different positions of the pattern corresponding to the bending detection unit are different, wherein the first direction is vertical to the extending direction of the bending region;

the bending detection units positioned in the first non-display area and the bending detection units positioned in the second non-display area are arranged in a one-to-one correspondence mode, and the sum of the relative areas of any two corresponding bending detection units is equal.

2. The display panel according to claim 1, further comprising a buffer layer covering the display region and the non-display region;

3. The display panel according to claim 2, wherein the area of the electrode pattern corresponding to the first electrode and/or the second electrode is gradually increased or gradually decreased along the first direction.

4. The display panel according to claim 3, wherein the areas of the electrode patterns corresponding to the first electrodes and/or the second electrodes are gradually increased or gradually decreased in an equal difference value or in an equal proportion; alternatively, the first and second electrodes may be,

5. The display panel according to claim 3, wherein the first electrode comprises a plurality of sequentially connected first sub-electrodes, and the second electrode comprises a plurality of sequentially connected second sub-electrodes;

6. The display panel according to claim 5, wherein the areas of the electrode patterns corresponding to the first sub-electrodes and/or the second sub-electrodes are gradually increased or gradually decreased in an equal difference value or in an equal proportion; alternatively, the first and second electrodes may be,

7. The display panel according to claim 3 or 4, wherein the cross-section of the electrode pattern has a shape including one or any combination of a rectangle, a triangle, a trapezoid, a diamond, a circle, a curve, and a dog-leg.

8. The display panel according to claim 2, wherein the first electrode and the gate layer are provided in the same layer, and wherein the second electrode and the source/drain layer are provided in the same layer.

9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.