CN107422931B - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN107422931B CN107422931B CN201710484747.2A CN201710484747A CN107422931B CN 107422931 B CN107422931 B CN 107422931B CN 201710484747 A CN201710484747 A CN 201710484747A CN 107422931 B CN107422931 B CN 107422931B
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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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
Abstract
The application discloses flexible display panel and display device. The flexible display panel includes: a flexible substrate comprising a first region and a second region; a touch electrode layer on the flexible substrate; a protective layer covering the touch electrode layer; in the touch electrode layer, the distance from at least part of the touch electrodes located in the first area to the upper surface of the protection layer is smaller than the distance from each touch electrode located in the second area to the upper surface of the protection layer, and the upper surface is the surface, far away from the flexible substrate, in the protection layer. In this embodiment, by adjusting the distance between the touch electrode and the upper surface of the protection layer, at least a portion of the touch electrode located in the first area can be closer to the upper surface of the protection layer than a portion of the touch electrode located in the second area, so as to improve the touch sensitivity of the first area, and further reduce the difference in touch effect between the first area and the second area.
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 communication technology, semiconductor and optical technology, flexible display technology has become more and more popular, changing people's lives, and bringing about a great revolution for science and technology. Compared to conventional screens, flexible display devices, such as: electronic paper (Electronic paper) and Organic Light-Emitting Diode (OLED) displays are thinner and lighter in size, lower in power consumption than original devices, and have the characteristics of flexibility, good flexibility and the like.
However, there is a certain difference in touch sensitivity between different positions of the existing flexible display panel, such as a bending area and a non-bending area, an edge area and a non-edge area of the panel, and so on. This may affect the overall touch effect of the flexible display panel.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present application provides an improved flexible display panel and display device to solve the technical problems mentioned in the above background.
In a first aspect, an embodiment of the present application provides a flexible display panel, including: a flexible substrate comprising a first region and a second region; a touch electrode layer on the flexible substrate; a protective layer covering the touch electrode layer; in the touch electrode layer, the distance from at least part of the touch electrodes located in the first area to the upper surface of the protection layer is smaller than the distance from each touch electrode located in the second area to the upper surface of the protection layer, and the upper surface is the surface, far away from the flexible substrate, in the protection layer.
In a second aspect, embodiments of the present application provide a display device including a flexible display panel as described in any implementation manner of the first aspect.
According to the flexible display panel and the display device provided by the embodiment of the application, the structure of the first area and/or the second area in the flexible display panel is/are adjusted, so that the distance from at least part of touch electrodes positioned in the first area to the upper surface of the protective layer in the touch electrode layer is smaller than the distance from each touch electrode positioned in the second area to the upper surface of the protective layer, and the distance between the at least part of touch electrodes and a touch finger is further shortened. Therefore, the touch sensitivity of the first area is improved, and the touch effect difference between the first area and the second area is reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of one embodiment of a flexible display panel provided herein;
FIG. 2 is a schematic structural diagram of an embodiment of a flexible display panel with mutually-compatible touch;
FIG. 3 is a top view of another embodiment of a flexible display panel with mutually-compatible touch;
FIG. 4a is a schematic diagram of the structure of one embodiment of the flexible display panel of FIG. 3;
FIG. 4b is a schematic diagram of another embodiment of the flexible display panel of FIG. 3;
FIG. 4c is a schematic diagram of a structure of yet another embodiment of the flexible display panel of FIG. 3;
FIG. 5 is a schematic structural diagram of another embodiment of a flexible display panel with mutually-compatible touch;
FIG. 6 is a schematic structural diagram of an embodiment of a self-contained touch flexible display panel;
FIG. 7 is a schematic structural diagram of one embodiment of a touch electrode layer;
FIG. 8 is a schematic structural view of one embodiment of a protective layer;
FIG. 9 is a schematic structural view of one embodiment of an optical glue layer;
FIG. 10 is a schematic diagram of another embodiment of a flexible display panel provided herein;
fig. 11 is a schematic structural diagram of an embodiment of a display device provided in the present application.
Detailed Description
The principles and features of the present application are described in further detail below with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Please refer to fig. 1, which shows a schematic structural diagram of an embodiment of a flexible display panel provided in the present application.
In the present embodiment, the flexible display panel may include a flexible substrate 10, a touch electrode layer 11, and a protective layer 12. As shown in fig. 1, the flexible substrate 10 may include a first region and a second region. The touch electrode layer 11 is located on the flexible substrate 10. Meanwhile, the protective layer 12 covers the touch electrode layer 11. Here, the first area may be an area of the flexible display panel having a relatively low touch sensitivity, and the second area may be an area of the flexible display panel having a relatively high touch sensitivity. Here, the flexible base material 10 may be a substrate of a flexible display panel, such as a substrate base plate made of a polyimide material. The flexible substrate 10 may also be a film layer inside the flexible display panel, such as a transparent planarization layer. The touch electrode layer 11 is used for implementing a touch function. That is, the touch position is determined by detecting the touch sensing signal of the touch electrode layer 11. The protective layer 12 is generally disposed on the upper surface (i.e., the surface for finger contact) of the flexible display panel to block moisture so as to prevent the film layer inside the flexible display panel from being corroded, thereby prolonging the service life of the flexible display panel. The protective layer 12 may be, but is not limited to, a layer formed by alternately stacking an organic material layer and an inorganic material layer.
At this time, in order to reduce the difference in touch sensitivity between the first region and the second region, in the touch electrode layer 11, a distance L1 from at least a portion of the touch electrodes located in the first region to the upper surface of the passivation layer 12 is smaller than a distance L1' from each of the touch electrodes located in the second region to the upper surface of the passivation layer 12. Wherein, the upper surface is the surface far away from the flexible substrate in the protective layer.
It can be understood that the capacitance generated between the touch electrode and the finger is related to the contact area and the distance between the two. Under the condition that the distance between the touch electrode and the finger is not changed, if the contact area between the first area and the finger is relatively small, the capacitance generated between the touch electrode of the first area and the finger is reduced, so that the touch sensitivity of the first area is lower than that of the second area. In the flexible display panel, the distance from the touch electrode in the first region to the upper surface of the protective layer is reduced, that is, the distance between the touch electrode in the first region and the finger is reduced, so that the capacitance difference caused by the difference of the touch areas is made up. It should be noted that the protective layer is generally a film layer of the flexible display panel directly contacting with a finger, and the finger can contact with the upper surface of the protective layer to perform a touch operation.
In some optional implementation manners of this embodiment, the first area may be an edge area of the flexible display panel, that is, a boundary between the touch display area and the non-display area. The second area may be a non-edge area of the flexible display panel, i.e., a touch display area except for the interface.
In other optional implementations of this embodiment, the first region may be a bending region, i.e., a curved portion in the flexible display panel. The second region may be a non-bending region, i.e., a non-curved portion (e.g., a flat portion) in the flexible display panel. The curved portion may be a fixed curved surface or a curved surface formed by folding the flexible display panel (i.e., a curved surface in a specific state). Since the contact area between the bending region and the finger is small compared to the contact area between the non-bending region and the finger, there is also a difference in touch sensitivity between the bending region and the non-bending region. By reducing the distance from the touch electrode in the bending region to the upper surface of the protective layer, the capacitance difference caused by different touch areas can be made up, and therefore the touch detection sensitivity difference between the bending region and the non-bending region is reduced.
Alternatively, the flexible display panel in the present application may be a fully curved panel. That is, the display area of the panel has no flat portion. For example, the display area of the flexible display panel is spherical (i.e., each point has a common center). For another example, the cross section of the flexible display panel is a curve, and the longitudinal section is a straight line. In this case, the first area may be an edge area of the curved panel, and the second area may be a non-edge area of the curved panel. The present application does not limit the specific division of the first region and the second region.
In addition, the flexible display panel in the present application may be a mutual capacitive touch display panel, and may also be a self-capacitive touch display panel. And the distance L1 from at least part of the touch electrodes located in the first region to the upper surface of the protective layer may be made smaller than the distance L1' from each touch electrode located in the second region to the upper surface of the protective layer in various ways. See in particular fig. 2-10.
Fig. 2 is a schematic structural diagram of an embodiment of a flexible display panel with mutual capacitive touch. The flexible display panel in this embodiment also includes a flexible substrate 10, a touch electrode layer 11, and a protective layer 12.
In the present embodiment, the touch electrode layer 11 may include a first touch electrode layer 111 and a second touch electrode layer 112. In the second touch electrode layer 112, a distance from the second touch electrode located in the first area to the upper surface of the protection layer 12 is smaller than a distance from the second touch electrode located in the second area to the upper surface of the protection layer 12.
In this embodiment, the first touch electrode and the second touch electrode are respectively used for receiving the touch driving signal and sending the touch sensing signal, that is, the first touch electrode is one of the touch transmitting electrode and the touch sensing electrode, and the second touch electrode is the other of the touch transmitting electrode and the touch sensing electrode. Therefore, the first touch electrode and the second touch electrode are insulated from each other. As shown in fig. 2, a first insulating layer 21 is disposed between the first touch electrode layer 111 and the second touch electrode layer 112. And the first touch electrode layer 111 is located between the flexible substrate 10 and the first insulating layer 21. At this time, in order to make the second touch electrode located in the first region closer to the upper surface of the protection layer, a thickness P1 of the first insulating layer 21 located in the first region may be greater than a thickness P1' of the first insulating layer 21 located in the second region. Meanwhile, in order to make the distance from the second touch electrode in the first area to the upper surface of the protection layer 12 smaller than the distance from the second touch electrode in the second area to the upper surface of the protection layer 12, the upper surface of the protection layer 12 may be a flat surface (i.e., on the same horizontal plane) as shown in fig. 2, or may be a non-flat surface. For example, the height from the upper surface of the protective layer in the first region to the flexible substrate is less than the height from the upper surface of the protective layer in the second region to the flexible substrate. That is, the protective layer has a difference in height between the first region and the second region. Of course, if the thickness of the passivation layer 12 in the first region is greater than that of the passivation layer 12 in the second region, and the difference between the thicknesses of the two regions is smaller than the difference (absolute value) between P1 and P1', the distance between the second touch electrode in the first region and the top surface of the passivation layer 12 may also be closer than the distance between the second touch electrode in the second region. That is, the difference in thickness of the protective layer is not sufficient to compensate for the difference in thickness of the first insulating layer.
In the mutual capacitance type touch display panel, the touch position is usually determined according to the sensing signal of the touch sensing electrode. Here, if the second touch electrode is a touch sensing electrode, the second touch electrode is located between the finger and the first touch electrode. Therefore, mutual interference among the three electrodes is reduced, the capacitance between the touch sensing electrode and the finger and the mutual capacitance between the touch sensing electrode and the touch emitting electrode are convenient to detect, and the touch detection precision is improved.
It can be understood that although the thickness of the first insulating layer 21 in the first area is increased, the distance between the second touch electrode in the first area and the finger can be reduced, but the mutual capacitance between the first touch electrode and the second touch electrode is affected at the same time. In order to compensate for this effect, the area of the overlapping region of the first touch electrode and the second touch electrode in the first region may be increased in various ways. For example, the shape, size, etc. of the first touch electrode and/or the second touch electrode in the first area are changed.
With reference to fig. 3, the first touch electrode layer 111 and the second touch electrode layer 112 may be disposed on the same layer. At this time, the first touch electrodes in the same row or the same column can be electrically connected in a bridge-crossing manner. Or the second touch electrodes in the same column or the same row are electrically connected in a bridge-crossing mode. In order to simplify the manufacturing process, the materials of the first touch electrode and the second touch electrode may be the same, such as both indium tin oxide materials or both metal materials. This can be formed in the same process.
In this embodiment, the flexible display panel may include the bridge signal line layer 13. A second insulating layer (e.g., the second insulating layer 22 shown in fig. 4 a-4 c, where fig. 4 a-4 c are schematic structural diagrams of three mutually-capacitive touch-sensitive flexible display panels, respectively) is disposed between the bridge signal line layer 13 and the touch electrode layer 11. In the first touch electrode layer 111, the first touch electrodes in the same row are electrically connected through the bridge-crossing signal line of the bridge-crossing signal line layer 13. It is understood that the shapes and relative position relationship of the first touch electrode and the second touch electrode in fig. 3 are only schematic. Specific structures of the mutually-compatible touch-sensing flexible display panel can be seen in fig. 4a to 4c, which are cross-sectional views of the flexible display panel in the direction a-a' in fig. 3.
As can be seen from fig. 4a, the bridge-spanning signal line layer 13 may be located between the flexible substrate 10 and the second insulating layer 22. That is, in both the first region and the second region, the bridge-crossing signal line layer 13 is located between the flexible substrate 10 and the second insulating layer 22. At this time, in order to make the second touch electrode 112 of the first region closer to the upper surface of the passivation layer 12, thereby improving the touch sensitivity of the first region, the thickness P2 of the second insulating layer 22 in the first region may be greater than the thickness P2' of the second insulating layer 22 in the second region. The upper surface of the protective layer 12 may be a flat surface or a non-flat surface.
As shown in fig. 4b, the touch electrode layer 11 may be located between the flexible substrate 10 and the second insulating layer 22. That is, the touch electrode layer 11 (the first touch electrode layer and the second touch electrode layer) is located between the flexible substrate 10 and the second insulating layer 22 in both the first area and the second area. At this time, in order to reduce the distance from the second touch electrode 112 to the upper surface of the passivation layer 12, the thickness P2 of the second insulating layer 22 in the first region may be less than the thickness P2' of the second insulating layer 22 in the second region. And, in order to simplify the manufacturing process, other film layers except the second insulating layer 22 may be manufactured according to a conventional process.
As can be seen from fig. 4c, in the first region, the bridge-crossing signal line layer 13 may be located between the flexible substrate 10 and the second insulating layer 22. In the second area, the touch electrode layer 11 is located between the flexible substrate 10 and the second insulating layer 22. By changing the relative position relationship between the layers in the first area and the second area, the second touch electrode 112 in the first area can be closer to the upper surface of the protective layer 12 than the second touch electrode 112 in the second area, so that the touch sensitivity of the first area is improved, and the overall thickness of the flexible display panel is not affected. At this time, in order to simplify the production process, the materials of the bridge-crossing signal line, the first touch electrode 111 and the second touch electrode 112 may be the same, such as all metal materials. Specifically, the conductive material located between the flexible substrate 10 and the second insulating layer 22 is a pattern corresponding to the bridge signal line layer 13 in the first area, and is a pattern corresponding to the touch electrode layer 11 in the second area.
By adjusting the positions of the film layers of the touch electrodes in different areas, the touch effect difference between different areas is reduced, for example, the touch effect difference between a bending area and a non-bending area can be reduced. Meanwhile, the thicknesses of other films are preferably not changed, or the thicknesses of all the films can be uniformly set, so that the process is simplified, and the functions of all the films are guaranteed.
In addition, the structure of the flexible display panel with mutual capacitive touch can also be as shown in fig. 5. In the first region, a third insulating layer 23 is disposed between the first touch electrode layer 111 and the second touch electrode layer 112. And the first touch electrode layer 111 is located between the flexible substrate 10 and the third insulating layer 23. That is, the first touch electrode layer 111 and the second touch electrode layer 112 in the first region are disposed in different layers. In the second area, the first touch electrode layer 111 and the second touch electrode layer 112 are disposed on the same layer and located between the flexible substrate 10 and the third insulating layer 23. The first touch electrode in the first touch electrode layer 111 is electrically connected to the second bridge signal line of the second bridge signal line layer 14. The third insulating layer 23 is located between the second bridge signal line layer 14 and the touch electrode layer 11. In this way, the distance from the second touch electrode in the first area to the upper surface of the protection layer 12 can be reduced, so that the touch sensitivity of the first area is improved, and the overall thickness of the flexible display panel is not affected. Also, in order to simplify the manufacturing process, the first touch electrode, the second touch electrode, and the second bridge signal line may have the same material.
Alternatively, in the second area, the second touch electrode in the second touch electrode layer 112 may be electrically connected through the second bridge signal line of the second bridge signal line layer 14. In this way, the extending direction of the second bridge signal line may be the same as the extending direction of the second touch electrode in the first area. When the same film layer is made of the same material, the arrangement of the patterns is more regular, and the production efficiency is improved.
Referring further to fig. 6, a schematic structural diagram of an embodiment of a self-contained touch flexible display panel is shown. In the present embodiment, each touch electrode in the touch electrode layer 11 receives a touch driving signal and transmits a touch sensing signal. That is, a self-capacitance is generated between each touch electrode and a common electrode (corresponding to ground) before touch. When a finger touches the panel, the capacitance generated between the finger and the touch electrode near the touch point affects the self-capacitance of the finger. Therefore, the touch position can be determined according to the change of the self-capacitance before and after touch.
As shown in fig. 6, the touch electrode layer 11 may include a third touch electrode layer 113 and a fourth touch electrode layer 114. And a fourth insulating layer 24 is disposed between the third touch electrode layer 113 and the fourth touch electrode layer 114. The thickness P4 of the fourth insulating layer 24 in the first region may be less than the thickness P4' of the fourth insulating layer 24 in the second region. This can reduce the distance from the touch electrode under the fourth insulating layer 24 (e.g., the touch electrode in the third touch electrode layer 113 close to the flexible substrate 10 in fig. 6) to the passivation layer 12. And other film layers can be manufactured according to the existing process, so that the influence on the existing production process flow can be reduced, and the cost generated by process adjustment is reduced.
Optionally, the third touch electrode layer and the fourth touch electrode layer may also be disposed on the same layer. And each touch electrode can be electrically connected with at least one touch signal line. At this time, if the insulating layer is disposed between the touch electrode layer and the touch signal line layer, in order to reduce the distance from the touch electrode in the first area to the protective layer, the thickness of the insulating layer in the first area and/or the second area may be changed, or the relative position of the touch electrode layer in the flexible display panel may be adjusted. Reference may be made to the related descriptions in fig. 4a to fig. 4c, which are not described herein again.
For the flexible display panel in each of the above embodiments, the touch sensitivity of the first area may also be improved by at least one of the following manners.
The thickness of the touch electrode in the touch electrode layer can be adjusted. As an example, in the touch electrode layer, among the touch electrodes close to the protective layer, the thickness of at least a portion of the touch electrodes located in the first area is greater than the thickness of the touch electrodes located in the second area. Here, at least a part of the touch electrodes may be touch sensing electrodes in a flexible display panel with mutual capacitive touch, or may be touch electrodes in a flexible display panel with self capacitive touch. And each touch electrode in the touch electrode layer can be arranged on the same layer or different layers. As shown in fig. 7, a first insulating layer 21 is disposed between the first touch electrode layer 111 and the second touch electrode layer 112. At this time, since the second touch electrode layer 112 is close to the passivation layer 12, the thickness L2 of the second touch electrode in the first region may be greater than the thickness L2' of the second touch electrode in the second region. And the upper surface of the protective layer 12 may be, but is not limited to, a flat surface. It should be noted that, as the thickness of the touch electrode increases, the bending of the flexible display panel may be affected to some extent, so the thickness of the touch electrode cannot be adjusted infinitely.
In addition, as shown in fig. 8, it is also possible to make the thickness L3 of the protective layer 12 in the first region smaller than the thickness L3' of the protective layer 12 in the second region. In some application scenarios, if the protective layer 12 and the flexible substrate 10 are attached by an optical adhesive layer, the touch sensitivity of the first area can also be improved by changing the thickness of the optical adhesive layer. Specifically, as shown in fig. 9, the thickness L4 of the optical adhesive layer 15 in the first region is smaller than the thickness L4' of the optical adhesive layer 15 in the second region. The two modes improve the touch sensitivity of the first area, and meanwhile, other film layers can be manufactured according to the existing process, so that the influence on the existing production process can be reduced, the functions of all the film layers are ensured, the production cost is reduced, and the thin design of the flexible display panel is facilitated.
Optionally, the flexible display panel may further include a fifth insulating layer located between the touch electrode layer and the protective layer. At this time, since the fifth insulating layer is located above the touch electrode layer, i.e., close to the protection layer, if the thickness of the fifth insulating layer in the first region is smaller than that of the fifth insulating layer in the second region, the touch sensitivity of the first region can also be improved. And other film layers can be manufactured according to the existing process, so that the influence on the existing production process can be reduced, the functions of all the film layers are ensured, and meanwhile, the production cost is reduced.
In some embodiments, as shown in fig. 10, the flexible display panel may further include a sixth insulating layer 26. The sixth insulating layer 26 is located between the flexible substrate 10 and the touch electrode layer 11. And the sixth insulating layer 26 is disposed only in the first region. Compared with the touch electrodes in the second area, the touch electrodes in the first area can be integrally close to the upper surface of the protective layer 12, so that the touch sensitivity of the first area is improved, the influence on the existing production process of each film layer is small, the function of each film layer is ensured, and the production cost is reduced.
Further, the flexible display panel may further include a seventh insulating layer between the flexible substrate and the touch electrode layer. At this time, since the seventh insulating layer is located below the touch electrode layer, i.e., away from the protective layer, if the thickness of the seventh insulating layer in the first region is greater than that of the seventh insulating layer in the second region, the touch sensitivity of the first region can be improved.
The application also provides a display device. The display device may comprise the flexible display panel described in the above embodiments. The display device can be various electronic devices with display screens, such as mobile phones, tablet computers, smart watches and the like. Reference may be made to fig. 11, which is a schematic diagram illustrating one embodiment of a display device provided herein.
In this embodiment, in the display device, the distance from at least a part of the touch electrodes located in the first area to the upper surface of the protection layer in the touch electrode layer is smaller than the distance from each touch electrode located in the second area to the upper surface of the protection layer, so as to shorten the distance between the at least a part of the touch electrodes and the touch finger, thereby facilitating to improve the touch sensitivity of the first area and further improving the touch detection sensitivity of the display screen 1.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (18)
1. A flexible display panel, comprising:
a flexible substrate comprising a first region and a second region;
a touch electrode layer on the flexible substrate;
a protective layer covering the touch electrode layer;
in the touch electrode layer, the distance from at least part of the touch electrodes positioned in the first area to the upper surface of the protective layer is smaller than the distance from each touch electrode positioned in the second area to the upper surface of the protective layer, so that the touch sensitivity of the first area is improved; the upper surface is the surface of the protective layer away from the flexible substrate;
the touch electrode layer comprises a first touch electrode layer and a second touch electrode layer; in the second touch electrode layer, the distance from the second touch electrode positioned in the first area to the upper surface of the protection layer is smaller than the distance from the second touch electrode positioned in the second area to the upper surface of the protection layer.
2. The flexible display panel of claim 1, wherein the first region is a bent region and the second region is a non-bent region.
3. The flexible display panel according to claim 1, wherein a first insulating layer is disposed between the first touch electrode layer and the second touch electrode layer, and the first touch electrode layer is located between the flexible substrate and the first insulating layer.
4. The flexible display panel according to claim 3, wherein a thickness of the first insulating layer in the first region is larger than a thickness of the first insulating layer in the second region.
5. The flexible display panel according to claim 1, wherein the first touch electrode layer and the second touch electrode layer are disposed on the same layer;
the flexible display panel comprises a bridge-crossing signal line layer, and a second insulating layer is arranged between the bridge-crossing signal line layer and the touch electrode layer;
in the first touch electrode layers, the first touch electrodes in the same row or the same column are electrically connected through the bridge-crossing signal lines of the bridge-crossing signal line layer.
6. The flexible display panel of claim 5, wherein the bridge-spanning signal line layer is located between the flexible substrate and the second insulating layer;
the thickness of the second insulating layer in the first area is larger than that of the second insulating layer in the second area.
7. The flexible display panel of claim 5, wherein the touch electrode layer is located between the flexible substrate and the second insulating layer;
the thickness of the second insulating layer in the first area is smaller than that of the second insulating layer in the second area.
8. The flexible display panel of claim 5, wherein in a first region, the bridge-spanning signal line layer is between the flexible substrate and the second insulating layer;
in the second area, the touch electrode layer is located between the flexible substrate and the second insulating layer.
9. The flexible display panel according to claim 1, wherein a third insulating layer is disposed between the first touch electrode layer and the second touch electrode layer in the first region, and the first touch electrode layer is located between the flexible substrate and the third insulating layer;
in the second area, the first touch electrode layer and the second touch electrode layer are arranged on the same layer and are located between the flexible substrate and the third insulating layer, wherein the first touch electrode in the first touch electrode layer or the second touch electrode in the second touch electrode layer is electrically connected through a second bridge-spanning signal line of a second bridge-spanning signal line layer, and the third insulating layer is located between the second bridge-spanning signal line layer and the touch electrode layer.
10. The flexible display panel of claim 1, wherein each of the touch electrodes in the touch electrode layer receives a touch driving signal and transmits a touch sensing signal.
11. The flexible display panel according to claim 10, wherein the touch electrode layer comprises a third touch electrode layer and a fourth touch electrode layer, and a fourth insulating layer is disposed between the third touch electrode layer and the fourth touch electrode layer;
the thickness of the fourth insulating layer in the first area is smaller than that of the fourth insulating layer in the second area.
12. The flexible display panel according to claim 1, wherein, in the touch electrode layer, among the touch electrodes adjacent to the protective layer, at least a portion of the touch electrodes located in the first area have a thickness greater than that of the touch electrodes located in the second area.
13. The flexible display panel of claim 1, wherein the thickness of the protective layer in the first region is less than the thickness of the protective layer in the second region.
14. The flexible display panel of claim 1, wherein the protective layer is attached to the flexible substrate by an optical glue layer;
the thickness of the optical adhesive layer in the first area is smaller than that of the optical adhesive layer in the second area.
15. The flexible display panel of claim 1, wherein the flexible display panel comprises a fifth insulating layer between the touch electrode layer and the protection layer;
the thickness of the fifth insulating layer in the first area is smaller than that of the fifth insulating layer in the second area.
16. The flexible display panel of claim 1, wherein the flexible display panel comprises a sixth insulating layer;
the sixth insulating layer is only arranged in the first area and is positioned between the flexible substrate and the touch electrode layer.
17. The flexible display panel of claim 1, wherein the flexible display panel comprises a seventh insulating layer between the flexible substrate and the touch electrode layer;
the thickness of the seventh insulating layer in the first area is larger than that of the seventh insulating layer in the second area.
18. A display device, characterized in that the display device comprises a flexible display panel according to any one of claims 1-17.
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| CN107831959A (en) * | 2017-12-12 | 2018-03-23 | 信利光电股份有限公司 | A kind of capacitive touch screen of repeatable bending |
| CN108415612B (en) * | 2018-04-24 | 2021-05-14 | 上海天马微电子有限公司 | Touch device, touch display panel, display device and control method thereof |
| CN111373356B (en) * | 2018-10-26 | 2024-01-23 | 京东方科技集团股份有限公司 | Touch substrate, touch display device and method for manufacturing touch substrate |
| CN110244858B (en) * | 2019-06-26 | 2022-11-04 | 京东方科技集团股份有限公司 | Touch keyboard and electronic equipment |
| CN110191578B (en) | 2019-06-28 | 2020-05-12 | 武汉天马微电子有限公司 | Flexible circuit board and test fixture |
| CN110888550A (en) * | 2019-11-11 | 2020-03-17 | 汕头超声显示器技术有限公司 | Flexible touch sensing device and manufacturing method thereof |
| CN111261679B (en) | 2020-01-17 | 2022-05-13 | 京东方科技集团股份有限公司 | Touch panel, preparation method thereof and touch display device |
| CN111367430A (en) * | 2020-02-25 | 2020-07-03 | 合肥维信诺科技有限公司 | Touch display panel and touch display device |
| CN111427472A (en) * | 2020-03-12 | 2020-07-17 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111739413A (en) * | 2020-06-03 | 2020-10-02 | Oppo广东移动通信有限公司 | Terminal device, flexible screen and flexible display substrate |
| CN111667770B (en) * | 2020-07-15 | 2021-10-08 | 武汉华星光电技术有限公司 | Flexible display device |
| CN111949168B (en) * | 2020-08-27 | 2023-06-13 | 武汉天马微电子有限公司 | Touch display panel and touch display device |
| CN114489366A (en) * | 2020-11-12 | 2022-05-13 | 上海和辉光电股份有限公司 | Touch display panel, display device and electronic equipment |
| CN112860110B (en) * | 2021-02-09 | 2023-12-15 | 武汉华星光电半导体显示技术有限公司 | Touch display panel |
| CN113220159B (en) * | 2021-04-30 | 2022-11-01 | 昆山国显光电有限公司 | Touch panel and touch display device |
| CN117292635B (en) * | 2023-11-27 | 2024-03-26 | 深圳市康凌源科技有限公司 | Conduction testing method, device and equipment for curved flexible screen and storage medium |
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