CN108511494B - Flexible display panel and bending detection method thereof - Google Patents
Flexible display panel and bending detection method thereof Download PDFInfo
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- CN108511494B CN108511494B CN201810292558.XA CN201810292558A CN108511494B CN 108511494 B CN108511494 B CN 108511494B CN 201810292558 A CN201810292558 A CN 201810292558A CN 108511494 B CN108511494 B CN 108511494B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/28—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures
- G01B7/293—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures for measuring radius of curvature
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
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Abstract
The invention discloses a flexible display panel and a bending detection method thereof, wherein the flexible display panel comprises a flexible substrate, a light-emitting control driving circuit, a touch detection chip, a plurality of switch transistors and capacitors, wherein the light-emitting control driving circuit is positioned in the frame area of the flexible substrate and provided with a plurality of cascaded light-emitting control units, and the capacitors are correspondingly connected with the switch transistors one by one. Because each switch transistor is connected with at least part of the light-emitting control units in a one-to-one correspondence manner, each light-emitting control unit is used for turning on the switch transistors which are correspondingly connected one by one in a frame time; the touch detection chip is connected with each switch transistor, and is used for detecting capacitance values of the capacitors which are connected in a one-to-one correspondence mode one by one through the turned-on switch transistors in a frame time, and outputting an over-bending prompt when the capacitance value variation of the corresponding capacitor caused by bending of the area where at least one capacitor is located is larger than a preset threshold value. Therefore, the over-bending damage of the flexible display panel is effectively avoided, and the display effect is further ensured.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display panel and a bending detection method thereof.
Background
The flexible display panel is also called an OLED display panel. The successful mass production of the flexible display panel is not only greatly better than the manufacturing of a new generation of high-end smart phone, but also brings profound influence on the application of wearable equipment due to the characteristics of low power consumption and flexibility, and the flexible display panel can be widely applied along with the continuous penetration of a personal intelligent terminal in the future.
OLED display panels are thin and can be mounted on flexible substrates such as plastic or metal foils. The display panel can be bent by a thin film packaging technology and a protective film adhered to the back surface of the display panel. The size of the radius of curvature may be used to characterize the degree of curvature of the flexible display panel. When the curvature radius is too small and exceeds the bearing range of the flexible display panel, the flexible display panel is damaged due to the breakage of an internal circuit or the irreversible deformation of an outer packaging material, and the display effect is influenced.
Disclosure of Invention
In view of this, embodiments of the present invention provide a flexible display panel and a method for detecting bending thereof, so as to solve the problem of poor display effect caused by over-bending damage of the flexible display panel in the prior art.
Therefore, the flexible display panel provided by the embodiment of the invention comprises a flexible substrate, a touch detection chip and a light emitting control driving circuit, wherein the touch detection chip is positioned in a frame area of the flexible substrate, and the light emitting control driving circuit is provided with a plurality of cascaded light emitting control units; further comprising: the flexible substrate comprises a plurality of switch transistors and capacitors, wherein the switch transistors are positioned in the frame area of the flexible substrate, and the capacitors are connected with the switch transistors in a one-to-one correspondence manner;
each switch transistor is connected with at least part of the light-emitting control units in a one-to-one correspondence manner, and each light-emitting control unit is used for turning on the corresponding connected switch transistors one by one within a frame time;
the touch detection chip is connected with each switch transistor, and is multiplexed to detect the capacitance values of the capacitors which are connected in a one-to-one correspondence mode one by one through the turned-on switch transistors in a frame time, and when the fact that the capacitance value variation of the corresponding capacitor caused by bending of the area where at least one capacitor is located is larger than a preset threshold value is detected, an over-bending prompt is output.
In a possible implementation manner, in the flexible display panel provided in the embodiment of the present invention, the touch detection chip further determines, according to a corresponding relationship between each capacitor and an on time point of the switch transistor correspondingly connected to the capacitor in a frame time, an area where the capacitor with a changed capacitance value corresponding to the on time point is located as a bending position.
In a possible implementation manner, in the flexible display panel provided in the embodiment of the present invention, the capacitor includes a first electrode and a second electrode that are disposed opposite to each other and located on different film layers;
the distance between the first electrode and the second electrode changes along with the change of the bending degree of the area where the capacitor is located, so that the capacitance value of the capacitor changes along with the change of the bending degree of the area where the capacitor is located.
In a possible implementation manner, the flexible display panel provided in the embodiment of the present invention further includes a transistor located in the display area of the flexible substrate and used for driving the pixel, and each film layer in the switch transistor is located in the same layer as the same film layer in the transistor used for driving the pixel.
In a possible implementation manner, in the flexible display panel provided in the embodiment of the present invention, the flexible display panel further includes a common electrode, a passivation layer, and a pixel electrode, which are sequentially located on a side of the transistor for driving the pixel, the side being away from the flexible substrate, and the first electrode and the pixel electrode are disposed in the same layer.
In a possible implementation manner, in the flexible display panel provided in the embodiment of the present invention, the flexible display panel further includes an electroluminescence structure including a light emitting layer and a cathode layer on a side of the pixel electrode away from the flexible substrate, and areas of the light emitting layer and the cathode layer corresponding to the first electrode have hollow patterns.
In a possible implementation manner, in the flexible display panel provided in the embodiment of the present invention, the flexible display panel further includes an encapsulation thin film layer covering the organic electroluminescent structure, and a primary cloth laminating layer, a polarizer and a touch layer sequentially located on a side of the encapsulation thin film layer away from the electroluminescent structure, where the encapsulation thin film layer includes a first inorganic layer, a second inorganic layer and an organic layer disposed between the first inorganic layer and the second inorganic layer; the second electrode is located between the first inorganic layer and the organic layer; or the second electrode is located between the organic layer and the second inorganic layer; or the second electrode is positioned between the packaging film layer and the primary cloth laminating layer; or the second electrode is positioned between the primary cloth laminating layer and the polaroid; or the second electrode is positioned between the polarizer and the touch layer; or the polarizer is multiplexed as the second electrode.
In a possible implementation manner, in the flexible display panel provided in the embodiment of the present invention, the flexible display panel further includes: connecting each switch transistor to a single wire of the touch detection chip; or each switch transistor is connected to a plurality of wires of the touch detection chip one by one.
In a possible implementation manner, in the flexible display panel provided in the embodiment of the present invention, each of the switch transistors and each of the capacitors are specifically located in a frame region of the flexible substrate at the periphery of the light emission control driving circuit.
Correspondingly, an embodiment of the present invention further provides a method for detecting a bend of any one of the flexible display panels, including:
each light-emitting control unit is used for turning on the correspondingly connected switching transistors one by one within a frame time;
the touch detection chip is further used for detecting capacitance values of the capacitors which are connected in a one-to-one correspondence mode one by one through the turned-on switching transistors in one frame time, and outputting an over-bending prompt when the capacitance value variation of the corresponding capacitor caused by bending of the area where at least one capacitor is located is larger than a preset threshold value.
The invention has the following beneficial effects:
the flexible display panel comprises a flexible substrate, a light-emitting control driving circuit, a touch detection chip, a plurality of switch transistors and capacitors, wherein the light-emitting control driving circuit is arranged in a frame area of the flexible substrate and provided with a plurality of cascaded light-emitting control units, and the capacitors are correspondingly connected with the switch transistors one by one. Because each switch transistor is connected with at least part of the light-emitting control units in a one-to-one correspondence manner, each light-emitting control unit is used for turning on the switch transistors which are correspondingly connected one by one in a frame time; the touch detection chip is connected with each switch transistor, and is used for detecting capacitance values of the capacitors which are connected in a one-to-one correspondence mode one by one through the turned-on switch transistors in a frame time, and outputting an over-bending prompt when the capacitance value variation of the corresponding capacitor caused by bending of the area where at least one capacitor is located is larger than a preset threshold value. Therefore, the over-bending damage of the flexible display panel is effectively avoided, and the display effect is further ensured.
Drawings
Fig. 1 to 12 are schematic structural diagrams of a flexible display panel according to an embodiment of the present invention;
fig. 13 is a flowchart of a method for detecting bending of a flexible display panel according to an embodiment of the present invention.
Detailed Description
The following describes in detail a specific implementation of a flexible display panel and a bending detection method thereof according to an embodiment of the present invention with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are only a part of the embodiments of the present invention, and not all embodiments; and in case of conflict, the embodiments and features of the embodiments in the present application may be combined with each other; moreover, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.
The shape and size of the various film layers in the drawings do not reflect their true scale in flexible display panels and are intended only to illustrate the present invention.
As shown in fig. 1, the flexible display panel provided in the embodiment of the present invention includes a flexible substrate 101, a touch detection chip 102 located in a frame region of the flexible substrate 101, a light emission control driving circuit (EM-GOA) having a plurality of cascaded light emission control units 103, a plurality of switching transistors TFT, and capacitors C connected to the switching transistors TFT in a one-to-one correspondence manner; wherein the content of the first and second substances,
each switching transistor TFT is connected to at least a part of the light emission control units 103 in a one-to-one correspondence, and each light emission control unit 103 is multiplexed with switching transistors TFT that are turned on in a corresponding connection one by one within one frame time;
the touch detection chip 102 is connected to each switching transistor TFT, and is multiplexed to detect the capacitance value of each capacitor C connected in one-to-one correspondence one by one through each switching transistor TFT turned on in one frame time, and when it is detected that the capacitance value variation of the corresponding capacitor C caused by bending of the area where at least one capacitor C is located is greater than a preset threshold value, an over-bending prompt is output. Generally, to reduce the production cost, a chip is used to implement the display driving function and the touch detection function in the prior art, and in this case, the chip can be used as the touch detection chip 102 in the present invention.
According to the invention, the plurality of switching transistors TFT and the capacitors C which are connected with the switching transistors TFT in a one-to-one correspondence manner are additionally arranged in the flexible display panel, and the touch control driving chip 102 and the light-emitting control unit 103 are matched, so that the bending monitoring of the flexible display panel is realized, the over-bending damage of the flexible display panel is avoided, and the display effect is further ensured.
In addition, because the switching transistor TFT and the capacitor C are additionally arranged in the frame region at the periphery of the display region of the flexible substrate 101, the bending monitoring of the flexible display panel in different bending directions (length direction and width direction) can be realized, and meanwhile, the aperture ratio of the flexible display panel is not affected, and the resolution and the display color of the flexible display panel are not affected. Further, as shown in fig. 1, when the switching transistor TFT and the capacitor C are disposed in the frame region at the periphery of the light-emitting control unit 103, the arrangement of the original components (including the components of the display region and the light-emitting control unit 103) on the flexible substrate 101 may not be changed, so that the flexible display panel may be protected from being damaged by bending by performing a minimum change on the structure of the existing flexible display panel.
It can be understood that, each light-emitting control unit 103 sequentially turns on the switching transistors TFT connected thereto one by one within a frame time, so that each switching transistor TFT has a corresponding on-time point within a frame time, and the switching transistors TFT and the capacitors C are connected in a one-to-one correspondence, so that there is a one-to-one correspondence between the capacitors C with fixed positions and the on-time points of each switching transistor TFT within a frame time. When the touch detection chip 102 detects that the capacitance value of the corresponding capacitor C changes at the turn-on time point of a certain switching transistor TFT within a frame time, it can be determined that the region of the capacitor C where the capacitance value changes corresponding to the turn-on time point is the bending position.
In addition, in order to improve the sensitivity of the bending position detection, in the flexible display panel provided by the embodiment of the present invention, each switching transistor TFT may be connected to all the light emission control units 103 in one-to-one correspondence, as shown in fig. 2. With respect to fig. 1, by providing the switching transistors TFT connected in one-to-one correspondence with all the light emission control units 103 in fig. 2, the number of the switching transistors TFT is increased, so that the number of the capacitors C connected in one-to-one correspondence with the switching transistors TFT is increased, so that the density of the capacitors C in the flexible display panel is increased, and thus the bending position can be determined more accurately.
In practical applications, the connection between the switching transistors TFT and the touch detection chip 102 may be various, for example, as shown in fig. 1, each switching transistor TFT may be connected to the touch detection chip 102 through a single wire 104; as shown in fig. 3, each switching transistor TFT may be connected to the touch detection chip 102 through different wires 104. However, as can be seen from comparing fig. 1 and fig. 3, the frame of the flexible display panel is wider due to the larger number of the wires 104 in fig. 3, and therefore, in practical implementation, it is desirable to adopt the arrangement of the wires 104 in fig. 1 to obtain a narrower frame.
As shown in fig. 4, in the flexible display panel provided in the embodiment of the invention, the capacitor C includes a first electrode 105 and a second electrode 106 disposed opposite to each other and located on different film layers;
the distance between the first electrode 105 and the second electrode 106 varies with the degree of bending of the region where the capacitor C is located, so that the capacitance value of the capacitor C varies with the degree of bending of the region where the capacitor C is located.
In the flexible display panel provided in the embodiment of the present invention, as shown in fig. 4, a transistor (not shown in fig. 4) for driving a pixel is further included in the display region 110 of the flexible substrate 101, and each film layer (only the active layer 106, the gate electrode 107, and the source and drain electrodes 108 are shown in fig. 4) in the switching transistor TFT is located in the same layer as the same film layer in the transistor for driving the pixel. For example, the active layer in the transistor for driving the pixel is disposed in the same layer as the active layer 106 in the switching transistor TFT, the gate electrode in the transistor for driving the pixel is disposed in the same layer as the gate electrode 107 in the switching transistor TFT, and the source drain electrode in the transistor for driving the pixel is disposed in the same layer as the source drain electrode 108 in the switching transistor TFT. Of course, fig. 4 only shows an active layer, a gate electrode, and a source drain included in the transistor by way of example, and other essential components of the transistor should be understood by those skilled in the art, and are not described herein again, and should not be construed as limiting the present invention.
In practical applications, the flexible display panel provided by the embodiment of the invention can be manufactured by Low Temperature Polysilicon (LTPS) technology. As shown in fig. 5, the flexible display panel manufactured by the LTPS process further includes a common electrode (not shown in fig. 5), a passivation layer (not shown in fig. 5), and a pixel electrode 1101, which are sequentially located on a side of the transistor for driving the pixel, which is away from the flexible substrate 101. At this time, in order to simplify the manufacturing process, the first electrode 105 and the pixel electrode 1101 may be formed simultaneously by a single patterning process, that is, the first electrode 105 and the pixel electrode 1101 are disposed in the same layer. Specifically, the material used for manufacturing the first electrode 105 and the pixel electrode 1101 may be indium tin oxide ITO with a low resistance value. In order to improve the sensitivity of the bending detection, the material of the second electrode 106 also needs to be made of a material with a low resistance, that is, the film on which the second resistor 106 is located is a low-resistance film.
As shown in fig. 6, in the flexible display panel provided in the embodiment of the present invention, an electroluminescent structure 111 including a light emitting layer (not shown in fig. 6) and a cathode layer (not shown in fig. 6) is further included on a side of the pixel electrode 1101 facing away from the flexible substrate 101. In the prior art, both the display area and the frame area of the flexible display panel have a light emitting layer and a cathode layer, so as to prevent the light emitting layer and the cathode layer (generally, a metal layer) from blocking the touch signal applied to the capacitor C by the touch detection chip 102, which results in insensitive bending detection, as shown in fig. 6, in the flexible display panel of the present invention, the areas on the light emitting layer and the cathode layer corresponding to the first electrode 105 have hollow patterns, that is, the light emitting layer and the cathode layer directly above the first electrode 105 are hollowed. Since the first electrode 105 is located in the frame region, the light emitting layer directly above the first electrode 105 is hollowed out without affecting the characteristics of the light emitting layer in the display region.
As shown in fig. 7, the flexible display panel according to the embodiment of the present invention further includes an encapsulation thin film layer 112 covering the organic electroluminescent structure 111, a primary-layer cloth bonding layer 113, a polarizer 114, a touch layer 115, and a cover plate 116 sequentially located on a side of the encapsulation thin film layer 112 away from the electroluminescent structure 111, and a secondary-layer cloth bonding layer 117 located below the flexible substrate 101; the encapsulation thin film layer 112 includes a first inorganic layer 1121, a second inorganic layer 1123, and an organic layer 1122 disposed between the first inorganic layer 1121 and the second inorganic layer 1123. The second electrode 106 has seven possible embodiments:
in a first possible embodiment, as shown in fig. 7, the second electrode 106 is located between the first inorganic layer 1121 and the organic layer 1122; a second possible embodiment is shown in fig. 8, where the second electrode 106 is located between the organic layer 1122 and the second inorganic layer 1123; in a third possible embodiment, as shown in fig. 9, the second electrode 106 is located between the packaging film layer 112 and the primary cloth lamination layer 113; in a fourth possible embodiment, as shown in fig. 6, the second electrode 106 is located between the primary cloth lamination layer 113 and the polarizer 114; in a fifth possible embodiment, as shown in fig. 10, the second electrode 106 is located between the polarizer 114 and the touch layer 115; a sixth possible embodiment is shown in fig. 11, in which the second electrodes 106 are located between the primary cloth lamination layer 113 and the polarizer 114, but each second electrode 106 is an integral structure rather than a separate body; obviously, when the second electrodes 106 are located on other film layers shown in fig. 6 to 9, each second electrode 106 may also be an integral structure, which is not limited herein; in a seventh possible embodiment, as shown in fig. 12, the polarizer 114 with a smaller resistance value is multiplexed into the second electrode 106 with an integrated structure.
Based on the same inventive concept, embodiments of the present invention provide a method for detecting a bending of a flexible display panel, and because a principle of the method for detecting a bending of a flexible display panel to solve a problem is similar to a principle of the flexible display panel to solve a problem, the implementation of the method for detecting a bending of a flexible display panel provided by embodiments of the present invention may refer to the implementation of the flexible display panel provided by embodiments of the present invention, and repeated details are not repeated.
As shown in fig. 13, a method for detecting bending of a flexible display panel provided in an embodiment of the present invention may specifically include the following steps:
s1301, each light-emitting control unit is reused for turning on the correspondingly connected switching transistors one by one within a frame time;
and S1302, the touch detection chip is reused for detecting capacitance values of the capacitors connected in a one-to-one correspondence one by one through the turned-on switching transistors in one frame time, and outputting an over-bending prompt when the capacitance value variation of the corresponding capacitor caused by bending of the area where at least one capacitor is located is detected to be larger than a preset threshold value.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A flexible display panel comprises a flexible substrate, a touch detection chip and a light-emitting control drive circuit, wherein the touch detection chip is positioned in a frame area of the flexible substrate; it is characterized by also comprising: the flexible substrate comprises a plurality of switch transistors and capacitors, wherein the switch transistors are positioned in the frame area of the flexible substrate, and the capacitors are connected with the switch transistors in a one-to-one correspondence manner;
each switch transistor is connected with at least part of the light-emitting control units in a one-to-one correspondence manner, and each light-emitting control unit is used for turning on the corresponding connected switch transistors one by one within a frame time;
the touch detection chip is connected with each switch transistor, and is multiplexed to detect the capacitance values of the capacitors which are connected in a one-to-one correspondence mode one by one through the turned-on switch transistors in a frame time, and when the fact that the capacitance value variation of the corresponding capacitor caused by bending of the area where at least one capacitor is located is larger than a preset threshold value is detected, an over-bending prompt is output.
2. The flexible display panel according to claim 1, wherein the touch detection chip further determines, according to a correspondence between each of the capacitors and an on time point of the switching transistor correspondingly connected thereto within a frame time, an area where the capacitor having a capacitance value that changes at the on time point is a bent position.
3. The flexible display panel of claim 1, wherein the capacitor comprises a first electrode and a second electrode disposed opposite and on different film layers;
the distance between the first electrode and the second electrode changes along with the change of the bending degree of the area where the capacitor is located, so that the capacitance value of the capacitor changes along with the change of the bending degree of the area where the capacitor is located.
4. The flexible display panel of claim 3, further comprising a transistor in the flexible substrate display area for driving a pixel, wherein each layer of the switching transistor is in the same layer as the same layer of the transistor for driving a pixel.
5. The flexible display panel of claim 4, further comprising a common electrode, a passivation layer, and a pixel electrode sequentially on a side of the transistor for driving the pixel facing away from the flexible substrate, wherein the first electrode is disposed on the same layer as the pixel electrode.
6. The flexible display panel of claim 5, further comprising an electroluminescent structure comprising a light emitting layer and a cathode layer on a side of the pixel electrode facing away from the flexible substrate, wherein the light emitting layer and the cathode layer have a hollow pattern in an area corresponding to the first electrode.
7. The flexible display panel of claim 6, further comprising an encapsulation film layer covering the electroluminescent structure, a primary cloth lamination layer, a polarizer and a touch layer sequentially disposed on a side of the encapsulation film layer facing away from the electroluminescent structure, wherein the encapsulation film layer comprises a first inorganic layer, a second inorganic layer and an organic layer disposed between the first inorganic layer and the second inorganic layer; wherein the second electrode is located between the first inorganic layer and the organic layer; or the second electrode is located between the organic layer and the second inorganic layer; or the second electrode is positioned between the packaging film layer and the primary cloth laminating layer; or the second electrode is positioned between the primary cloth laminating layer and the polaroid; or the second electrode is positioned between the polarizer and the touch layer; or the polarizer is multiplexed as the second electrode.
8. The flexible display panel of any one of claims 1-7, further comprising: connecting each switch transistor to a single wire of the touch detection chip; or each switch transistor is connected to a plurality of wires of the touch detection chip one by one.
9. The flexible display panel according to any one of claims 1 to 7, wherein each of the switching transistors and each of the capacitors are located in a peripheral region of the flexible substrate at a periphery of the light emission control driving circuit.
10. A method of bending detection of a flexible display panel according to any of claims 1-9, comprising:
each light-emitting control unit is used for turning on the correspondingly connected switching transistors one by one within a frame time;
the touch detection chip is further used for detecting capacitance values of the capacitors which are connected in a one-to-one correspondence mode one by one through the turned-on switching transistors in one frame time, and outputting an over-bending prompt when the capacitance value variation of the corresponding capacitor caused by bending of the area where at least one capacitor is located is larger than a preset threshold value.
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| CN109192071B (en) * | 2018-10-16 | 2021-03-23 | 京东方科技集团股份有限公司 | Display panel, deformation induction method thereof and display device |
| CN109671355B (en) * | 2018-12-26 | 2021-02-26 | 厦门天马微电子有限公司 | Display panel and display device |
| KR20200081945A (en) * | 2018-12-28 | 2020-07-08 | 엘지디스플레이 주식회사 | Stretchable display device |
| CN110226230B (en) * | 2019-01-11 | 2022-12-09 | 京东方科技集团股份有限公司 | Flexible substrate, manufacturing method thereof and display panel |
| CN110224009B (en) * | 2019-06-06 | 2021-04-23 | 京东方科技集团股份有限公司 | Substrate base plate, display panel, manufacturing method of display panel and display device |
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