CN109062436B - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN109062436B CN109062436B CN201810866530.2A CN201810866530A CN109062436B CN 109062436 B CN109062436 B CN 109062436B CN 201810866530 A CN201810866530 A CN 201810866530A CN 109062436 B CN109062436 B CN 109062436B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract
The application discloses flexible display panel and display device for the parameter of buckling of detection display product knows the state of buckling of display product in real time, avoids showing the product excessively to buckle. The flexible display panel comprises a bending detection electrode layer, wherein the bending detection electrode layer comprises at least one electrode pair; and determining the bending angle and the bending direction of the flexible panel in the region of the electrode pair by detecting the current capacitance of the electrode pair.
Description
Technical Field
The application relates to the technical field of display, in particular to a flexible display panel and a display device.
Background
With the development of flexible display technology, the manufacture of foldable display products has become possible. However, the folding display product in the prior art cannot determine the bending angle during the use process.
To sum up, because prior art's folding display screen can't know its angle of buckling in real time in the use, can't know and show the product state of buckling, show that the product has the risk of excessively buckling.
Disclosure of Invention
The embodiment of the application provides a flexible display panel and a display device, which are used for detecting the bending parameters of a display product, knowing the bending state of the display product in real time and avoiding excessive bending of the display product.
The flexible display panel comprises a bending detection electrode layer, wherein the bending detection electrode layer comprises at least one electrode pair; and determining the bending angle and the bending direction of the flexible panel in the region of the electrode pair by detecting the current capacitance of the electrode pair.
The flexible display panel that this application embodiment provided, because display panel is including buckling the detection electrode layer, the detection electrode layer of buckling includes at least one electrode pair, thereby can be through detecting display panel's the angle of buckling and the direction of buckling are confirmed to the electric capacity of electrode pair, can know display panel's the state of buckling in real time, avoid display panel excessively to buckle.
Optionally, the flexible display panel further includes a capacitance detection unit, and the capacitance detection unit is configured to:
detecting a present capacitance of the electrode pair;
and determining the bending angle and the bending direction of the flexible panel in the region where the electrode pair is located according to the current capacitance of the electrode pair.
Therefore, by detecting the current capacitance of the electrode pair, the display panel can be determined to be bent when the current capacitance of the electrode pair changes, and the bending angle and direction of the display panel can be determined.
Optionally, the capacitance detection unit is further configured to:
and determining whether the bending angle of the flexible display panel exceeds a preset value, and sending an alarm signal when the bending angle of the flexible display panel exceeds a preset threshold value.
Optionally, the first electrode and the second electrode of the pair of electrodes are located in the same layer.
Therefore, the current capacitance of the electrode pair is convenient to detect, and the process difficulty of the display panel preparation is not increased.
Optionally, the thickness of the first electrode is equal to the thickness of the second electrode, the first electrode and the second electrode are opposite, and the opposite sides of the first electrode and the second electrode are parallel.
Optionally, the first electrode and the second electrode of the pair of electrodes are bulk electrodes.
Optionally, the electrode pair is disposed at an edge of the flexible display panel.
Optionally, the flexible display panel is a touch display panel, and further includes a touch electrode layer, and the first electrode and the second electrode of the electrode pair are disposed on the same layer as the touch electrode in the touch electrode layer.
Therefore, the first electrode and the second electrode can be formed while the touch electrode is formed, the bending parameters of the display panel can be detected under the condition that the preparation process flow of the display panel is not increased, and the thickness of the display panel is not increased. .
Optionally, the flexible display panel further comprises: the touch control device comprises a thin film transistor substrate, an electroluminescent device layer located on the thin film transistor substrate, and a packaging layer located on the electroluminescent device layer, wherein a touch control electrode layer is located on the packaging layer, or the touch control electrode layer is attached to the packaging layer through a glue material.
The embodiment of the application provides a display device, which comprises the flexible display panel provided by the embodiment of the application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 view of a flexible display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a cross section along AA' in FIG. 1 according to an embodiment of the present disclosure;
fig. 3 is a schematic view illustrating a flexible display panel according to an embodiment of the present disclosure being bent outward;
fig. 4 is a schematic diagram illustrating a relationship between a first electrode, a second electrode and a substrate when the flexible display panel provided in the embodiment of the present application is bent outward;
fig. 5 is a schematic view illustrating a flexible display panel according to an embodiment of the present disclosure being bent inward;
fig. 6 is a schematic diagram illustrating a relationship between a first electrode, a second electrode, and a substrate when a flexible display panel provided in the embodiment of the present application is bent inward;
fig. 7 is a schematic view of another flexible display panel provided in an embodiment of the present application;
fig. 8 is a schematic view of another flexible display panel provided in an embodiment of the present application;
fig. 9 is a schematic view of another flexible display panel provided in an embodiment of the present application.
Detailed Description
The embodiment of the present application provides a flexible display panel, as shown in fig. 1, the flexible display panel includes a bending detection electrode layer 1, and the bending detection electrode layer includes at least one electrode pair 15; and determining the bending angle and the bending direction of the flexible panel in the region of the electrode pair by detecting the current capacitance of the electrode pair.
The flexible display panel that this application embodiment provided, because display panel is including buckling the detection electrode layer, the detection electrode layer of buckling includes at least one electrode pair, thereby can be through detecting display panel's the angle of buckling and the direction of buckling are confirmed to the current electric capacity of electrode pair, can know display panel's the state of buckling in real time, avoid display panel excessively to buckle.
It should be noted that the bending direction includes inward bending or outward bending. The capacitance of the electrode pair may be detected, for example, by a capacitance detection unit, which may be provided independently of the flexible display panel or in the display panel.
Next, taking an example that the capacitance detection unit is disposed in the flexible display panel, the flexible display panel provided in the embodiment of the present application is illustrated.
As shown in fig. 1, each electrode pair 15 includes a first electrode 2 and a second electrode 3; the flexible display panel further comprises a capacitance detection unit 4, wherein the capacitance detection unit 4 is configured to: detecting the current capacitance of the electrode pair 15, and determining the bending angle and the bending direction of the flexible panel in the area where the electrode pair 15 is located according to the current capacitance of the electrode pair 15; in fig. 1, each first electrode 2 is led out through a first electrode lead 5 to be connected with a capacitance detection unit 4, and each second electrode 3 is connected with the capacitance detection unit 4 through a second electrode lead 6.
It should be noted that, a cross section along AA' in fig. 1 is as shown in fig. 2, the first electrode 2 and the second electrode 3 are disposed on the substrate 7, lengths of the first electrode and the second electrode are both l, thicknesses of the first electrode and the second electrode are both h, and a distance between the first electrode and the second electrode is D, so that under a condition that the flexible display panel is not bent, a capacitance between the first electrode and the second electrode is formed
Where k is the constant of the electrostatic force and ε is the dielectric constant. As shown in fig. 3, when the flexible display panel is bent toward the side of the substrate opposite to the first electrode and the second electrode, i.e. outward, the first electrode is bentFIG. 4 shows a schematic view of the relationship among the second electrode and the substrate, where the bending radius is r and the bending angle is r
The deflection angles of the first electrode and the second electrode are both
The facing height of the first electrode and the second electrode
The distance between the bottom ends of the first and second electrodes
Distance between the tips of the first and second electrodes
At this time, the capacitance between the first electrode and the second electrode
As shown in fig. 5, when the display panel is bent toward the substrate facing the first electrode and the second electrode, i.e., inward, the relationship among the first electrode, the second electrode, and the substrate is schematically shown in fig. 6, where the bending radius is r, and the bending angle is r
The deflection angles of the first electrode and the second electrode are both
The facing height of the first and second electrodes
The distance between the bottom ends of the first and second electrodes
Distance between the tips of the first and second electrodes
At this time, the capacitance between the first electrode and the second electrode
That is, the distance between the first electrode and the second electrode changes due to the bending of the display panel, and therefore the capacitance between the first electrode and the second electrode also changes correspondingly, so that by detecting the capacitance between the first electrode and the second electrode, the bending of the display panel can be determined when the capacitance between the first electrode and the second electrode changes, and the bending angle and direction of the display panel can be determined according to the above formula.
Optionally, the capacitance detection unit is further configured to:
and determining whether the bending angle of the flexible display panel exceeds a preset value, and sending an alarm signal when the bending angle of the flexible display panel exceeds a preset threshold value.
For example, when a user uses a display product including the display panel provided by the embodiment of the application and bends the display product, if the bending angle exceeds a preset threshold value, the capacitance detection unit sends out an alarm signal, so that the user is reminded of displaying the bending state of the product, and the display product is prevented from being damaged by continuously bending. The preset threshold value can be set according to actual needs.
Optionally, the first electrode and the second electrode of the pair of electrodes are located in the same layer. Therefore, the capacitance between the first electrode and the second electrode can be conveniently detected, and the process difficulty of the display panel preparation is not increased.
Optionally, a thickness of a first electrode of the electrode pair is equal to a thickness of a second electrode, the first electrode and the second electrode are opposite, and sides of the first electrode and the second electrode opposite are parallel.
Optionally, in the flexible display panel provided in this embodiment of the present application, the first electrode and the second electrode are block electrodes.
It should be noted that, in the flexible display panel shown in fig. 1 and 2 provided in the embodiment of the present application, the first electrode 2 and the second electrode 3 are both rectangular block-shaped electrodes, the thicknesses of the two block-shaped electrodes are equal and are opposite to each other, and one opposite side of the first electrode is parallel to one opposite side of the second electrode, so that the capacitance between the first electrode and the second electrode is convenient to calculate, and the detection of the bending angle of the display panel is not difficult.
Optionally, the first electrode and the second electrode of the electrode pair are disposed at an edge of the flexible display panel.
Optionally, the flexible display panel is a touch display panel, and further includes a touch electrode layer, and the first electrode and the second electrode are disposed on the same layer as the touch electrode in the touch electrode layer. Therefore, the first electrode and the second electrode can be formed while the touch electrode is formed, the bending parameters of the display panel can be detected under the condition that the preparation process flow of the display panel is not increased, and the thickness of the display panel is not increased.
Fig. 1 illustrates that the display panel includes one electrode pair as an example, and certainly, in the flexible display panel provided in the embodiment of the present disclosure, the bending detection electrode layer may include a plurality of electrode pairs, as shown in fig. 7, the display panel includes a plurality of electrode pairs 15, and the first electrode 2, the second electrode 3 and the touch electrode 16 are disposed in the same layer, that is, the first electrode and the second electrode are disposed on the touch electrode layer of the display panel, and the first electrode and the second electrode are disposed on the edge of the touch electrode layer. It should be noted that, as shown in fig. 7, since a plurality of first electrodes and second electrodes are disposed on two adjacent edges of the touch electrode layer, when the bending fold of the display panel is parallel to X, Y, the bending angle and direction can be detected at any position of the display panel where the bending fold is located. In addition, for the example that the display panel is bent along the straight line X, the first electrode and the second electrode on the two sides of the straight line X are arranged at the edge of the display panel or in the middle of the display panel to detect the bending angle and direction, and the first electrode and the second electrode are arranged at the edge of the display panel, so that the blank area of the display panel can be reasonably utilized, and the detection of the bending angle and direction of the display panel can be realized under the condition that the design difficulty of the display panel is not increased.
Optionally, the flexible display panel further comprises: the touch control device comprises a thin film transistor substrate, an electroluminescent device layer and a packaging layer, wherein the touch control electrode layer is positioned on the packaging layer, or the touch control electrode layer is attached to the packaging layer through a glue material. The flexible display panel provided in the embodiment of the present application may be an embedded touch display panel or an external touch display panel, and for the embedded touch display panel, an on-cell method is taken as an example, as shown in fig. 8, the flexible display panel includes: the display device comprises a TFT substrate 8, an OLED device layer 9, an encapsulation layer 10, a touch electrode layer 12, a rubber material 11, a polarizing layer 13, a rubber material 11 and a cover plate 14, wherein the touch electrode layer 12 comprises a touch electrode, and a first electrode and a second electrode which are arranged on the same layer as the touch electrode. As shown in fig. 9, for the external touch display panel, the flexible display panel includes: the display device comprises a TFT substrate 8, an OLED device layer 9, an encapsulation layer 10, a rubber material 11, a touch electrode layer 12, a rubber material 11, a polarizing layer 13, a rubber material 11 and a cover plate 14. In fig. 8 and 9, the touch electrode layer 12 includes a touch electrode, and a first electrode and a second electrode disposed on the same layer as the touch electrode.
The embodiment of the application provides a display device, which comprises the flexible display panel provided by the embodiment of the application.
The display device provided by the embodiment of the application can be a mobile phone, a tablet computer and the like.
To sum up, flexible display panel and display device that this application embodiment provided because display panel is including buckling the detection electrode layer to can detect display panel's the parameter of buckling, can know display panel's the state of buckling in real time, avoid display panel excessively to buckle. According to the display panel provided by the embodiment of the application, through detecting the capacitance between the first electrode and the second electrode, when the capacitance between the first electrode and the second electrode changes, the display panel can be determined to be bent, and the bending angle and direction of the display panel can be determined.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A flexible display panel is characterized in that the flexible display panel comprises a bending detection electrode layer, and the bending detection electrode layer comprises at least one electrode pair; determining the bending angle and the bending direction of the flexible panel in the region where the electrode pair is located by detecting the current capacitance of the electrode pair;
the electrode pairs are arranged at the edge of the flexible display panel;
the flexible display panel is a touch display panel and further comprises a touch electrode layer, a first electrode and a second electrode of the electrode pair are arranged on the same layer with the touch electrode in the touch electrode layer, and the first electrode and the second electrode are arranged on the edge of the touch electrode layer.
2. The flexible display panel of claim 1, further comprising a capacitance detection unit to:
detecting a present capacitance of the electrode pair;
and determining the bending angle and the bending direction of the flexible panel in the region where the electrode pair is located according to the current capacitance of the electrode pair.
3. The flexible display panel of claim 2,
the capacitance detection unit is further configured to:
and determining whether the bending angle of the flexible display panel exceeds a preset value, and sending an alarm signal when the bending angle of the flexible display panel exceeds a preset threshold value.
4. The flexible display panel according to claim 1 or 2, wherein the first electrode and the second electrode of the electrode pair are located in the same layer.
5. The flexible display panel according to claim 1 or 2, wherein a thickness of a first electrode of a pair of electrodes is equal to a thickness of a second electrode, the first electrode and the second electrode face each other, and sides of the first electrode and the second electrode face each other are parallel.
6. The flexible display panel of claim 5, wherein the first electrode and the second electrode are bulk electrodes.
7. The flexible display panel according to claim 1 or 2, further comprising: the touch control device comprises a thin film transistor substrate, an electroluminescent device layer located on the thin film transistor substrate, and a packaging layer located on the electroluminescent device layer, wherein a touch control electrode layer is located on the packaging layer, or the touch control electrode layer is attached to the packaging layer through a glue material.
8. A display device comprising the flexible display panel according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810866530.2A CN109062436B (en) | 2018-08-01 | 2018-08-01 | Flexible display panel and display device |
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| CN201810866530.2A CN109062436B (en) | 2018-08-01 | 2018-08-01 | Flexible display panel and display device |
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| CN109062436B true CN109062436B (en) | 2021-12-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109671355B (en) * | 2018-12-26 | 2021-02-26 | 厦门天马微电子有限公司 | Display panel and display device |
| CN109584725B (en) | 2019-01-02 | 2021-10-01 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
| CN109933248A (en) * | 2019-02-28 | 2019-06-25 | 武汉华星光电半导体显示技术有限公司 | Flexible touch panel, display device and its bending method for detecting area |
| CN110097826B (en) * | 2019-03-28 | 2022-06-28 | 云谷（固安）科技有限公司 | Display screen, display screen bending detection device and method and display device |
| CN110660329B (en) * | 2019-09-29 | 2021-12-14 | 武汉天马微电子有限公司 | Flexible display module and flexible display device |
| CN111176383B (en) * | 2019-12-31 | 2021-07-09 | 上海天马有机发光显示技术有限公司 | Flexible display panel and display device |
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