Stretchable display module, display device and driving method

Abstract

The present application provides a stretchable display module, a display device and a driving method. The present application sets a thin film transistor in a first isolation structure so that the first isolation structure has a switch function; and reuses the touch block as the cathode of the sub-pixel in the corresponding pixel island, and sets a first isolation structure between the pixel islands, so that the electrical connection between the cathodes of adjacent pixel islands can be controlled by the first isolation structure, thereby controlling the electrical connection between adjacent touch blocks; further, when the stretchable display module is in a stretched state, the cathodes of the pixel islands in the pixel island group are disconnected by controlling the first isolation structure, so that at least part of the pixel islands are insulated from other pixel islands in the pixel island group, so that at least part of the touch blocks in the touch area where the pixel island group is located are insulated from other touch blocks, so that the touch area is divided into multiple sub-touch areas for separate control, thereby improving the touch accuracy of the stretchable display module.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a stretchable display module, a display device and a driving method. Background Art

[0002] As a new form of display device, flexible stretchable display screens have attracted widespread attention from consumers. Due to their variable display size, they can be applied to multiple scenarios. In recent years, stretchable display devices that can stretch / contract in a specific direction and change to a fixed shape by forming display pixel units, connecting wires, and light-emitting units on a flexible substrate made of organic materials have been widely used as a new generation of display devices.

[0003] For stretchable display products, when the screen is stretched, the distance between pixels in the display area will increase, and the area of ​​the original single touch block will become larger after stretching, resulting in different areas of the single touch block before and after stretching, resulting in reduced touch accuracy. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a stretchable display module, a display device and a driving method, so as to solve the problem in the prior art that the touch accuracy of stretchable display products is reduced after being stretched.

[0005] In order to solve the above technical problems, the first technical solution provided by the present application is: providing a stretchable display module, which includes a display panel and a touch layer embedded in the display panel; the touch layer includes a plurality of touch areas, each of which is provided with at least two touch blocks;

[0006] The display panel comprises:

[0007] A pixel island group is arranged in a one-to-one correspondence in the touch area; the pixel island group includes at least two adjacent pixel islands; the pixel island includes sub-pixels; the pixel islands are arranged in a one-to-one correspondence with the touch blocks, and the touch blocks are multiplexed as cathodes corresponding to the sub-pixels in the pixel islands;

[0008] A first isolation structure is disposed between two adjacent pixel islands and is used to connect or disconnect the two adjacent pixel islands; the first isolation structure comprises a first conductive portion and a top insulating portion protruding from an upper surface of the first conductive portion and shielding and extending the first conductive portion toward the adjacent first isolation structure;

[0009] Wherein, the first conductive part includes a first conductive part and a second conductive part which are spaced apart and insulated;

[0010] The first isolation structure further includes a thin film transistor located on the lower surface of the top insulating portion, one of the first conductive portion and the second conductive portion is multiplexed as a source of the thin film transistor, and the other is multiplexed as a drain of the thin film transistor;

[0011] The stretchable display module includes a stretched state and a non-stretched state;

[0012] In the stretched state, the cathodes of the pixel islands in the pixel island group are disconnected by the first isolation structure to form at least two groups of pixel groups insulated from each other; the pixel group includes at least one pixel island;

[0013] In the non-stretched state, cathodes of the pixel islands in the pixel island group are electrically connected to each other via the first isolation structure.

[0014] Wherein, in the stretched state, each of the touch control areas is divided into a plurality of touch control sub-areas, and the pixel groups are arranged in the touch control sub-areas and are arranged in a one-to-one correspondence with the touch control sub-areas.

[0015] The display panel further comprises a pixel definition layer; a pixel opening is arranged on the pixel definition layer, and the sub-pixels are arranged in the pixel opening in a one-to-one correspondence; the first conductive portion is arranged on the upper surface of the pixel definition layer;

[0016] The pixel island further includes a second isolation structure, which is located on the upper surface of the pixel definition layer and between the sub-pixels in the pixel island.

[0017] Among them, the second isolation structure includes a second conductive part and the top insulating part protruding from the upper surface of the second conductive part and shielding and extending the second conductive part toward the adjacent second isolation structure; the cathodes of the sub-pixels in each of the pixel islands are connected to each other through the second isolation structure to form the touch block.

[0018] Wherein, the thin film transistor is a bottom gate structure, and the gate of the thin film transistor is arranged in the same layer as the anode of the sub-pixel.

[0019] Wherein, the touch layer further comprises a plurality of signal connection lines and a driving chip electrically connected to the plurality of signal connection lines respectively; each of the touch blocks is connected to one of the signal connection lines; the driving chip is a touch and display driver integrated chip.

[0020] Among them, each detection screen includes multiple display times and multiple touch times, and the display time and the touch time are set alternately; during the display time, the driver chip transmits a common voltage to the touch block through the signal connection line; during the touch time, the driver chip transmits a touch signal to the touch block through the signal connection line, and receives the sensing signal through the signal connection line to determine the touch position.

[0021] In order to solve the above technical problem, the second technical solution provided in the present application is: to provide a display device, which includes the above-mentioned stretchable display module.

[0022] In order to solve the above technical problems, the third technical solution provided by the present application is: providing a driving method of a stretchable display module, wherein the stretchable display module is the above-mentioned stretchable display module, wherein the driving method of the stretchable display module comprises:

[0023] receiving a stretching signal and determining a state of the stretchable display module; the state includes a stretching state and a non-stretching state;

[0024] When in the stretched state, the first isolation structure between the pixel islands in the pixel island group is at least partially disconnected, so that the cathodes of the pixel islands in the pixel island group are disconnected to form at least two mutually insulated pixel groups; the pixel group includes at least one pixel island;

[0025] If in the non-stretched state, all first isolation structures between the pixel islands in the pixel island group are turned on, so that the cathodes of the pixel islands in the pixel island group are turned on.

[0026] Wherein, when in the stretched state, the first isolation structure between the pixel islands in the pixel island group is at least partially disconnected, including:

[0027] The deformation degree of the stretchable display module is obtained, and according to the deformation degree, the number of disconnections of the first isolation structure between the pixel islands in the pixel island group is determined.

[0028] Beneficial effects of the present application: Different from the prior art, the present application provides a stretchable display module, a display device and a driving method, wherein the stretchable display module includes a display panel and a touch layer embedded in the display panel. The touch layer includes a plurality of touch areas, each of which is provided with at least two touch blocks. The display panel includes a pixel island group and a first isolation structure. The pixel island groups are arranged in a one-to-one correspondence in the touch areas. The pixel island group includes at least two adjacent pixel islands. The pixel island includes sub-pixels. The pixel islands are arranged in a one-to-one correspondence with the touch blocks, and the touch blocks are reused as cathodes of the sub-pixels in the corresponding pixel islands. The first isolation structure is arranged between two adjacent pixel islands and is used to turn on or off two adjacent pixel islands. The first isolation structure includes a first conductive portion and a top insulating portion protruding from the upper surface of the first conductive portion and shielding and extending the first conductive portion toward the adjacent first isolation structure. Among them, the first conductive portion includes a first conductive portion and a second conductive portion that are spaced and insulated. The first isolation structure also includes a thin film transistor located on the lower surface of the top insulating portion, one of the first conductive portion and the second conductive portion is multiplexed as the source of the thin film transistor, and the other is multiplexed as the drain of the thin film transistor. The stretchable display module includes a stretched state and a non-stretched state. In the stretched state, the cathodes of the pixel islands in the pixel island group are disconnected by the first isolation structure to form at least two groups of pixels insulated from each other. The pixel group includes at least one pixel island. In the non-stretched state, the cathodes of the pixel islands in the pixel island group are connected to each other through the first isolation structure. The present application sets a thin film transistor in the first isolation structure so that the first isolation structure has the function of a switch; and reuses the touch block as the cathode of the sub-pixel in the corresponding pixel island, and sets the first isolation structure between the pixel islands, so that the electrical connection between the cathodes of adjacent pixel islands can be controlled by the first isolation structure, thereby controlling the electrical connection between adjacent touch blocks; further, when the stretchable display module is in a stretched state, the cathodes of the pixel islands in the pixel island group are disconnected by controlling the first isolation structure, so that at least part of the pixel islands are insulated from other pixel islands in the pixel island group, so that at least part of the touch blocks in the touch area where the pixel island group is located are insulated from other touch block settings, so that the touch area is divided into multiple sub-touch areas for separate control, thereby improving the touch accuracy of the stretchable display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1is a structural schematic diagram of an embodiment of a stretchable display module provided by the present application before being stretched;

[0031] Figure 2 is a schematic structural diagram of an embodiment of a display panel provided by the present application before being stretched;

[0032] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0033] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at BB in the middle;

[0034] Figure 5 is a schematic structural diagram of an embodiment of a pixel island group after stretching provided by the present application;

[0035] Figure 6 yes Figure 5 The structure of an embodiment of the touch control area where the middle pixel island group is located after stretching;

[0036] Figure 7 is a schematic structural diagram of another embodiment of the pixel island group after stretching provided by the present application;

[0037] Figure 8 yes Figure 7 The structure of another embodiment of the touch control area where the middle pixel island group is stretched;

[0038] Fig. 9 It is a flow chart of an implementation method of a stretchable display module provided in the present application.

[0039] Description of Figure Numbers:

[0040] Display panel 100, pixel island group 10, pixel island 11, sub-pixel 110, anode 111, light-emitting layer 112, cathode 113, second isolation structure 120, second conductive portion 121, first pixel island T1, second pixel island T2, third pixel island T3, fourth pixel island T4, pixel group 130, first isolation structure 20, first conductive portion 21, first conductive portion 211, second conductive portion 212, top insulating portion 22, thin film transistor 23, source S, drain D, gate G, semiconductor layer 230, pixel definition layer 30, pixel opening 31, drive substrate 40, touch layer 200, touch area 201, touch block 202, touch sub-area 203. DETAILED DESCRIPTION

[0041] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0042] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] See also Figures 1 to 4 , Figure 1 is a structural schematic diagram of an embodiment of a stretchable display module provided by the present application before being stretched, Figure 2 is a schematic structural diagram of an embodiment of a display panel provided by the present application before being stretched, Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the middle. Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at BB in the middle.

[0047] The present application provides a stretchable display module. The stretchable display module includes a display panel 100 and a touch layer 200 embedded in the display panel 100. The touch layer 200 includes a plurality of touch areas 201, each of which is provided with at least two touch blocks 202. The display panel 100 includes a pixel island group 10 and a first isolation structure 20. The pixel island group 10 is arranged in a one-to-one correspondence in the touch area 201. The pixel island group 10 includes at least two adjacent pixel islands 11. The pixel island 11 includes a sub-pixel 110, and the pixel island 11 is arranged in a one-to-one correspondence with the touch block 202, and the touch block 202 is reused as the cathode 113 of the sub-pixel 110 in the corresponding pixel island 11. The first isolation structure 20 is arranged between two adjacent pixel islands 11, and is used to turn on or off the two adjacent pixel islands 11. The first isolation structure 20 includes a first conductive portion 21 and a top insulating portion 22 protruding from the upper surface of the first conductive portion 21 and shielding and extending the first conductive portion 21 toward the adjacent first isolation structure 20. The first conductive portion 21 includes a first conductive portion 211 and a second conductive portion 212 spaced apart and insulated. The first isolation structure 20 also includes a thin film transistor 23 located on the lower surface of the top insulating portion 22, one of the first conductive portion 211 and the second conductive portion 212 being multiplexed as a source S of the thin film transistor 23, and the other being multiplexed as a drain D of the thin film transistor 23. The stretchable display module includes a stretched state and a non-stretched state. In the stretched state, the cathodes 113 of the pixel islands 11 in the pixel island group 10 are disconnected by the first isolation structure 20 to form at least two groups of pixel groups 130 insulated from each other (see Figure 5 The pixel group 130 includes at least one pixel island 11. In the non-stretched state, the cathodes 113 of the pixel islands 11 in the pixel island group 10 are electrically connected to each other through the first isolation structure 20.

[0048] The present application sets a thin film transistor 23 in the first isolation structure 20, so that the first isolation structure 20 has a switch function; and the touch block 202 is reused as the cathode 113 of the sub-pixel 110 in the corresponding pixel island 11, and the first isolation structure 20 is set between the pixel islands 11, so that the electrical connection between the cathodes 113 of adjacent pixel islands 11 can be controlled by the first isolation structure 20, thereby controlling the electrical connection between adjacent touch blocks 202; further, when the stretchable display module is in a stretched state, the cathodes 113 of the pixel islands 11 in the pixel island group 10 are disconnected by the first isolation structure 20, so that at least part of the pixel islands 11 are insulated from other pixel islands 11 in the pixel island group 10, so that at least part of the touch blocks 202 in the touch area 201 where the pixel island group 10 is located are insulated from other touch blocks 202, so as to divide the touch area 201 into multiple sub-touch areas 201 (see Figure 6) for individual control, thereby improving the touch accuracy of the stretchable display module.

[0049] One pixel island group 10 is arranged in one touch area 201. That is, the number of touch areas 201 is equal to the number of pixel island groups 10. The pixel island group 10 includes a plurality of adjacently arranged pixel islands 11. Each pixel island group 10 includes at least one sub-pixel 110. The number of sub-pixels 110 included in each pixel island group 10 may be the same or different, which is not limited here and is selected according to actual needs.

[0050] When each pixel island group 10 includes one sub-pixel 110, the touch block 202 is used as the cathode 113 of the sub-pixel 110 in the corresponding pixel island group 10. When each pixel island group 10 includes a plurality of sub-pixels 110, the cathodes 113 of all the sub-pixels 110 in each pixel island group 10 are connected to each other to form the touch block 202.

[0051] It should be understood that the number of sub-pixels 110 in the pixel island group 10 determines the area of ​​the touch block 202. The more sub-pixels 110 there are in the pixel island group 10, the larger the area of ​​the touch block 202 is, and the lower the touch accuracy is. There is no restriction on the number of sub-pixels 110 in the pixel island group 10, and it is selected according to actual needs.

[0052] The sub-pixel 110 includes an anode 111, a light-emitting layer 112, and a cathode 113 stacked in sequence from bottom to top. One sub-pixel 110 corresponds to one color pixel. The sub-pixel 110 is an OLED. There is no restriction on the arrangement of pixels of different colors, and it is selected according to actual needs.

[0053] In this embodiment, the pixel islands 11 are arranged in an array, and each pixel island group 10 includes the same number of pixel islands 11. The number of sub-pixels 110 included in each pixel island 11 is the same, and the sub-pixels 110 in each pixel island 11 are arranged in an array to ensure that the area size of the touch block 202 is the same, which is convenient for adjusting the touch accuracy of the stretchable display module.

[0054] The first isolation structure 20 is disposed between adjacent pixel islands 11. It can be understood that when each pixel island 11 includes a sub-pixel 110, the first isolation structure 20 is located between two adjacent sub-pixels 110, and the two adjacent sub-pixels 110 are respectively located in two adjacent pixel islands 11, and the cathodes 113 of the sub-pixels 110 included in each of the adjacent pixel islands 11 overlap the first isolation structure 20 between the adjacent pixel islands 11. When each pixel island 11 includes a plurality of sub-pixels 110, the sub-pixels 110 are arranged in an array, and the first isolation structure 20 is located between two adjacent rows of sub-pixels 110, and the two adjacent rows of sub-pixels 110 are respectively located in two adjacent pixel islands 11, and the cathodes 113 of the two adjacent rows of sub-pixels 110 overlap the first isolation structure 20.

[0055] The cathodes 113 of adjacent pixel islands 11 are electrically connected and disconnected through the first isolation structure 20. It should be understood that since the cathodes 113 of the sub-pixels 110 in each pixel island 11 are mutually conductive to form a touch block 202, the adjacent pixel islands 11 are electrically connected and disconnected through the first isolation structure 20, that is, the touch blocks 202 corresponding to the adjacent pixel islands 11 can be electrically connected and disconnected through the first isolation structure 20. In other words, the adjacent touch blocks 202 are electrically connected and disconnected through the first isolation structure 20.

[0056] Specifically, the first isolation structure 20 includes a first conductive portion 21 and a top insulating portion 22 protruding from the upper surface of the first conductive portion 21 and shielding and extending the first conductive portion 21 toward the adjacent first isolation structure 20. The first conductive portion 21 in the first isolation structure 20 overlaps with the cathode 113 of the sub-pixel 110. The projection area of ​​the top insulating portion 22 is larger than the projection area of ​​the first conductive portion 21, so that when evaporating the sub-pixel 110, the evaporation angle of the cathode 113 and the light-emitting layer 112 can be adjusted through the top insulating portion 22 to ensure that the cathode 113 covers the light-emitting layer 112 and can form a good overlap with the first conductive portion 21.

[0057] The material and shape of the top insulating portion 22 are not limited here and can be selected according to actual needs.

[0058] The first conductive part 21 includes a first conductive part 211 and a second conductive part 212 that are spaced apart and insulated. It can be understood that a via is provided on the first conductive part 21 to split the first conductive part 21 into two spaced apart and insulated first conductive parts 211 and second conductive parts 212. The first conductive part 211 and the second conductive part 212 are located in the same layer and spaced apart.

[0059] The first isolation structure 20 also includes a thin film transistor 23 located on the lower surface of the top insulating portion 22, that is, the first isolation structure 20 has a switch function due to the thin film transistor 23, and can realize electrical connection and disconnection. Specifically, one of the first conductive portion 211 and the second conductive portion 212 is reused as the source S of the thin film transistor 23, and the other is reused as the drain D of the thin film transistor 23. One of the adjacent pixel islands 11 is overlapped with the first conductive portion 211, and the other is overlapped with the second conductive portion 212, so as to realize electrical connection between the cathodes 113 of the adjacent pixel islands 11 through conduction through the gate G of the thin film transistor 23, and realize disconnection between the cathodes 113 of the adjacent pixel islands 11 through disconnection of the gate G of the thin film transistor 23.

[0060] There is no limitation on the type of the thin film transistor 23 , and the type can be selected according to actual needs.

[0061] Reusing one of the first conductive portion 211 and the second conductive portion 212 as the source S of the thin film transistor 23 and the other as the drain D of the thin film transistor 23 can not only save the cost of the thin film transistor 23, but also reduce the space between the pixel islands 11 occupied by the first isolation structure 20, which is beneficial to improving the resolution of the display panel 100.

[0062] That is to say, the first isolation structure 20 of the present application can not only adjust the evaporation angle of the cathode 113 and the light-emitting layer 112 of the sub-pixel 110 to ensure good overlap between the pixel island 11 and the first conductive part 21 of the first isolation structure 20, but also act as a switch to control the electrical connection and disconnection between the cathodes 113 of adjacent pixel islands 11.

[0063] like Figure 4 As shown, the display panel 100 further includes a pixel definition layer 30, on which a pixel opening 31 is provided, and the sub-pixels 110 are arranged in the pixel opening 31 in a one-to-one correspondence. The first conductive portion 21 is arranged on the upper surface of the pixel definition layer 30. The cathode 113 of the sub-pixel 110 located at the inner edge of the pixel island 11 extends out of the pixel opening 31 and overlaps with the first conductive portion 21. The thin film transistor 23 further includes a semiconductor layer 230 and a gate G. The thin film transistor 23 is a bottom gate structure. The semiconductor layer 230 is arranged between the pixel definition layer 30 and the source electrode S, and is arranged between the pixel definition layer 30 and the drain electrode D. The gate G is located on the side of the pixel definition layer 30 away from the first conductive portion 21.

[0064] The thickness of the semiconductor layer 230 is 1000-2500 angstroms, and the thickness of the first conductive portion 21 is 2500-3500 angstroms, so as to ensure that the semiconductor layer 230 can be embedded in the first conductive portion 21 .

[0065] In this embodiment, the gate G of the thin film transistor 23 is disposed in the same layer as the anode 111 of the sub-pixel 110. Disposing the gate G of the thin film transistor 23 and the anode 111 of the sub-pixel 110 in the same layer can simplify the manufacturing process.

[0066] It should be understood that in other embodiments, the gate G may be disposed in a different layer from the anode 111. This is not limited here and is selected according to actual needs. The material of the thin film transistor 23 may be the same as or different from the material of the anode 111. When the material of the gate G of the thin film transistor 23 is the same as the material of the anode 111, the gate G and the anode 111 may be formed by patterning the same conductive layer.

[0067] Furthermore, the pixel island 11 further includes a second isolation structure 120 , which is located on the upper surface of the pixel definition layer 30 and between the sub-pixels 110 in the pixel island 11 .

[0068] In the present embodiment, the second isolation structure 120 includes a second conductive portion 121 and a top insulating portion 22 protruding from the upper surface of the second conductive portion 121 and shielding and extending the second conductive portion 121 toward the adjacent second isolation structure 120. The cathodes 113 of the sub-pixels 110 in each pixel island 11 are connected to each other through the second isolation structure 120 to form a touch block 202. The cathodes 113 of the sub-pixels 110 in the pixel island 11 overlap with the second conductive portion 121 of the second isolation structure 120 to connect the cathodes 113 between the adjacent sub-pixels 110 in the pixel island 11. The top insulating portion 22 can also play a role in adjusting the evaporation angle of the cathode 113 and the light-emitting layer 112. That is, the cathodes 113 of all the sub-pixels 110 in the pixel island 11 and the second conductive portion 121 of the second isolation structure 120 located in the pixel island 11 together form the touch block 202.

[0069] It should be understood that the second isolation structure 120 can only serve as an insulating isolation column to isolate the sub-pixel 110. The sub-pixel 110 in the pixel island 11 is prepared by the FMM (Fine Metal Mask) process, and the second isolation structure 120 does not serve to conduct the cathode 113 of the sub-pixel 110 in the pixel island 11. The cathodes 113 of the sub-pixels 110 in the pixel island 11 are arranged in contact with each other to form a touch block 202.

[0070] The touch layer 200 includes a plurality of touch regions 201, and each touch region 201 is provided with at least two touch blocks 202. It should be understood that the touch blocks 202 in different touch regions 201 are insulated from each other.

[0071] That is, the pixel island groups 10 are insulated from each other. No matter the stretchable display module is in a stretched state or a non-stretched state, the second isolation structures 120 between the pixel islands 11 and between the pixel island groups 10 are disconnected to ensure that each pixel island group 10 is insulated from other pixel island groups 10.

[0072] The touch layer 200 further includes a plurality of signal connection lines (not shown) and a driver chip (not shown) electrically connected to the plurality of signal connection lines. Each touch block 202 is connected to a signal connection line. The driver chip is a touch and display driver integration (TDDI) chip.

[0073] Each frame includes multiple display times and multiple touch times, and the display time and the touch time are set alternately. During the display time, the driver chip transmits the common voltage to the touch block 202 through the signal connection line, that is, the driver chip transmits the common voltage to the cathode 113 of the sub-pixel 110 through the signal connection line. During the touch time, the driver chip transmits the touch signal to the touch block 202 through the signal connection line, and receives the sensing signal through the signal connection line to determine the touch position.

[0074] In the stretched state, each touch area 201 is divided into a plurality of touch sub-areas 203, and the pixel groups 130 are arranged in the touch sub-areas 203, and are arranged one-to-one corresponding to the touch sub-areas 203. In other words, the number of touch sub-areas 203 is equal to the number of pixel groups 130. Each touch sub-area 203 includes at least one touch block 202. It should be understood that the touch sub-areas 203 are insulated from each other.

[0075] That is, in the stretched state, affected by the tension, the spacing between the pixel islands 11 increases, resulting in an increase in the area of ​​the touch region 201 where the pixel island group 10 is located, and a decrease in touch accuracy. By setting the second isolation structure 120 between the pixel islands 11 of the pixel island group 10, at least part of the pixel islands 11 in the pixel island group 10 are insulated from other pixel islands 11 in the pixel island group 10 after stretching, so as to divide the touch region 201 where the pixel island group 10 is located into a plurality of touch sub-regions 203, thereby improving touch accuracy.

[0076] During the touch time and in the stretched state, the driver chip can transmit a touch signal to at least one touch block 202 in the touch sub-area 203. That is, during the touch time and in the stretched state, the driver chip can simultaneously transmit a touch signal to one or more touch blocks 202 in the touch sub-area 203. Since each touch block 202 is connected to a signal connection line, and the touch blocks 202 in each touch sub-area 203 are interconnected, when a touch signal is transmitted to one touch block 202, other touch blocks 202 in the touch sub-area 203 can also receive the touch signal.

[0077] In the non-stretched state, the cathodes 113 of the pixel islands 11 in the pixel island group 10 are connected to each other through the first isolation structure 20, so that the cathodes 113 of the sub-pixels 110 in the pixel island group 10 are connected to each other, and the touch blocks 202 in the touch area 201 where the pixel island 11 is located are electrically connected to each other.

[0078] Similarly, during the touch time and in the non-stretched state, the driver chip transmits a touch signal to at least one touch block 202 in the touch area 201 .

[0079] See also Figure 1 , Figure 5 and Figure 6 , Figure 5 is a schematic structural diagram of an embodiment of a pixel island group after stretching provided by the present application, Figure 6 yes Figure 5 The structure of an embodiment of the touch control area where the pixel island group is stretched.

[0080] The following is a specific description using an example in which each pixel island group 10 includes four pixel islands 11 arranged in a 2×2 manner.

[0081] Each pixel island group 10 includes four pixel islands 11, namely a first pixel island T1, a second pixel island T2, a third pixel island T3 and a fourth pixel island T4. The first pixel island T1 and the second pixel island T2 are located in the same row, the third pixel island T3 and the fourth pixel island T4 are located in the same row, and the first pixel island T1 and the third pixel island T3 are located in the same column.

[0082] In the non-stretched state, the first pixel island T1 , the second pixel island T2 , the third pixel island T3 and the fourth pixel island T4 are electrically connected to each other through the first isolation structure 20 .

[0083] In the stretched state, at least one of the first pixel island T1, the second pixel island T2, the third pixel island T3 and the fourth pixel island T4 is insulated from the other pixel islands 11 to form at least two pixel groups 130 that are insulated from each other.

[0084] When two pixel groups 130 are formed, and each pixel group 130 includes two pixel islands 11, the first pixel island T1 is insulated and arranged on the second pixel island T2 or the third pixel island T3. Taking the first pixel island T1 insulated and arranged on the second pixel island T2 as an example, the first isolation structure 20 between the first pixel island T1 and the second pixel island T2 is disconnected, the first isolation structure 20 between the third pixel island T3 and the fourth pixel island T4 is disconnected, the first isolation structure 20 between the first pixel island T1 and the third pixel island T3 is turned on, and the second isolation structure 120 between the second pixel island T2 and the fourth pixel island T4 is turned on, so that the first pixel island T1 and the third pixel island T3 form a pixel group 130, and the second pixel island T2 and the fourth pixel island T4 form a pixel group 130. The touch area 201 where the pixel island group 10 is located is divided into two touch sub-areas 203 of equal area.

[0085] See also Figure 1 , Figure 7 and Figure 8 , Figure 7 is a schematic structural diagram of another embodiment of the pixel island group after stretching provided by the present application, Figure 8 yes Figure 7 The structure of another embodiment of the touch control area where the pixel island group is stretched.

[0086] When two pixel groups 130 are formed and the number of pixel islands 11 included in each pixel group 130 is different, one of the first pixel island T1, the second pixel island T2, the third pixel island T3 and the fourth pixel island T4 is insulated from the other three pixel islands 11 to form a pixel group 130, and the other three pixel islands 11 form a pixel group 130. Taking the first pixel island T1 forming a pixel group 130 as an example, the first isolation structure 20 between the first pixel island T1 and the second pixel island T2 is disconnected, the first isolation structure 20 between the first pixel island T1 and the third pixel island T3 is disconnected, the first isolation structure 20 between the fourth pixel island T4 and the third pixel island T3 is turned on, and the first isolation structure 20 between the fourth pixel island T4 and the second pixel island T2 is turned on, so that the first pixel island T1 forms a pixel group 130, the second pixel island T2, the third pixel island T3 and the fourth pixel island T4 form a pixel group 130, and the touch area 201 where the pixel island group 10 is located is divided into two touch sub-areas 203 of unequal areas.

[0087] It should be understood that, by analogy, the pixel island group 10 can form at most four pixel groups 130, that is, each pixel group 130 includes one pixel island 11, and the touch control area 201 where the pixel island group 10 is located is divided into four touch control sub-areas 203 of equal area. The pixel island group 10 can also form three pixel groups 130, two of the three pixel groups 130 each include one pixel island 11, and the other pixel group 130 includes two pixel islands 11, and the touch control area 201 where the pixel island group 10 is located is divided into three touch control sub-areas 203.

[0088] It should be understood that the number of touch sub-areas 203 into which the touch area 201 is divided and the area of ​​each touch sub-area 203 are related to the degree of deformation of the touch area 201 after stretching. The greater the degree of deformation of the touch area 201, the greater the number of touch sub-areas 203, and the area of ​​the touch sub-area 203 corresponding to the place with a large degree of deformation in the touch area 201 is small, so as to improve the touch accuracy.

[0089] The display panel 100 also includes a driving substrate 40, which includes a stretchable substrate (not shown) and a driving circuit layer (not shown) arranged on one side of the stretchable substrate. The pixel island 11 is arranged on one side of the driving substrate 40. The stretchable substrate at least partially includes a flexible substrate. It can be understood that the stretchable substrate is a flexible substrate. Alternatively, the stretchable substrate includes a flexible substrate and a non-flexible substrate located between the flexible substrates. When the stretchable substrate includes a flexible substrate and a non-flexible substrate located between the flexible substrates, the flexible substrate is located in the stretching area and the non-flexible substrate is located in the island area. There is no restriction on the material of the stretchable substrate here, and it is selected according to actual needs. There is no restriction on the structure of the driving substrate 40 here, and it is selected according to actual needs.

[0090] The present application provides a display device, the display device comprising the above-mentioned stretchable display module. The stretchable display module comprises a display panel and a touch layer embedded in the display panel. The display panel is an OLED (Organic Light-Emitting Diode) display panel. The touch layer is a self-capacitance structure.

[0091] See also Fig. 9 , Fig. 9 It is a flow chart of an implementation method of a stretchable display module provided in the present application.

[0092] The present application provides a method for driving a stretchable display module. The stretchable display module is the stretchable display module mentioned above. The specific steps of the method for driving the stretchable display module include:

[0093] S10: receiving a stretching signal and determining a state of the stretchable display module; the state includes a stretching state and a non-stretching state.

[0094] Specifically, a stretching signal is received to determine the state of the stretchable display module. The state includes a stretching state and a non-stretching state. That is, a stretching signal is received to determine whether the stretchable display module is in a stretching state or a non-stretching state.

[0095] S20: If in the stretched state, the first isolation structure between the pixel islands in the pixel island group is at least partially disconnected, so that the cathodes of the pixel islands in the pixel island group are disconnected to form at least two groups of mutually insulated pixel groups; the pixel group includes at least one pixel island.

[0096] Specifically, if in a stretched state, the first isolation structure between the pixel islands in the pixel island group is at least partially disconnected, so that the cathodes of the pixel islands in the pixel island group are disconnected to form at least two groups of mutually insulated pixel groups. The pixel group includes at least one pixel island. Referring to the above description, it is not repeated here.

[0097] If in a stretched state, the specific steps of at least partially disconnecting the first isolation structure between the pixel islands in the pixel island group include: obtaining the deformation degree of the stretchable display module, and determining the number of disconnected first isolation structures between the pixel islands in the pixel island group based on the deformation degree.

[0098] The greater the deformation degree of the stretchable display module, the more the first isolation structures between the pixel islands in the pixel island group are disconnected, and the more touch sub-areas the touch area is divided into. Then, the smaller the number of touch blocks included in the corresponding touch sub-areas, and the smaller the area of ​​the touch sub-areas, the greater the touch accuracy, so as to balance the decrease in touch accuracy caused by the increase in the area of ​​the touch area after stretching deformation.

[0099] S30: If in the non-stretched state, all first isolation structures between the pixel islands in the pixel island group are turned on, so that the cathodes of the pixel islands in the pixel island group are turned on.

[0100] Specifically, if in a non-stretched state, all first isolation structures between pixel islands in the pixel island group are turned on, so that cathodes of pixel islands in the pixel island group are turned on.

[0101] It should be noted that there is no particular order for step S20 and step S30.

[0102] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] The above are only implementation methods of the present application, and are not intended to limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A stretchable display module, characterized in that: It comprises a display panel and a touch layer embedded in the display panel; the touch layer comprises a plurality of touch areas, and each of the touch areas is provided with at least two touch blocks; The display panel comprises: A pixel island group is arranged in a one-to-one correspondence in the touch area; the pixel island group includes at least two adjacent pixel islands; the pixel island includes sub-pixels; the pixel islands are arranged in a one-to-one correspondence with the touch blocks, and the touch blocks are multiplexed as cathodes corresponding to the sub-pixels in the pixel islands; A first isolation structure is disposed between two adjacent pixel islands and is used to connect or disconnect the two adjacent pixel islands; the first isolation structure comprises a first conductive portion and a top insulating portion protruding from an upper surface of the first conductive portion and shielding and extending the first conductive portion toward the adjacent first isolation structure; Wherein, the first conductive part includes a first conductive part and a second conductive part which are spaced apart and insulated; The first isolation structure further includes a thin film transistor located on the lower surface of the top insulating portion, one of the first conductive portion and the second conductive portion is multiplexed as a source of the thin film transistor, and the other is multiplexed as a drain of the thin film transistor; The stretchable display module includes a stretched state and a non-stretched state; In the stretched state, the cathodes of the pixel islands in the pixel island group are disconnected by the first isolation structure to form at least two groups of pixel groups insulated from each other; the pixel group includes at least one pixel island; In the non-stretched state, cathodes of the pixel islands in the pixel island group are electrically connected to each other via the first isolation structure.

2. The stretchable display module according to claim 1, characterized in that: In the stretched state, each of the touch control areas is divided into a plurality of touch control sub-areas, and the pixel groups are arranged in the touch control sub-areas and correspond one to one with the touch control sub-areas.

3. The stretchable display module according to claim 2, characterized in that: The display panel further comprises a pixel definition layer; a pixel opening is arranged on the pixel definition layer, and the sub-pixels are arranged in the pixel opening in a one-to-one correspondence; the first conductive portion is arranged on the upper surface of the pixel definition layer; The pixel island further includes a second isolation structure, which is located on the upper surface of the pixel definition layer and between the sub-pixels in the pixel island.

4. The stretchable display module according to claim 3, characterized in that: The second isolation structure includes a second conductive part and a top insulating part protruding from the upper surface of the second conductive part and shielding and extending the second conductive part toward an adjacent second isolation structure; the cathodes of the sub-pixels in each pixel island are connected to each other through the second isolation structure to form the touch block.

5. The stretchable display module according to claim 1, characterized in that: The thin film transistor is a bottom gate structure, and the gate of the thin film transistor is arranged in the same layer as the anode of the sub-pixel.

6. The stretchable display module according to claim 1, characterized in that: The touch layer further comprises a plurality of signal connection lines and a driving chip electrically connected to the plurality of signal connection lines respectively; each of the touch blocks is connected to one of the signal connection lines; the driving chip is a touch and display driver integrated chip.

7. The stretchable display module according to claim 6, characterized in that: Each detection screen includes multiple display times and multiple touch times, and the display time and the touch time are set alternately; during the display time, the driver chip transmits a common voltage to the touch block through the signal connection line; during the touch time, the driver chip transmits a touch signal to the touch block through the signal connection line, and receives a sensing signal through the signal connection line to determine the touch position.

8. A display device, characterized in that: A stretchable display module comprising any one of claims 1 to 7.

9. A method for driving a stretchable display module, wherein the stretchable display module is the stretchable display module according to any one of claims 1 to 7, characterized in that: The driving method of the stretchable display module comprises: receiving a stretching signal and determining a state of the stretchable display module; the state includes a stretching state and a non-stretching state; When in the stretched state, the first isolation structure between the pixel islands in the pixel island group is at least partially disconnected, so that the cathodes of the pixel islands in the pixel island group are disconnected to form at least two mutually insulated pixel groups; the pixel group includes at least one pixel island; If in the non-stretched state, all first isolation structures between the pixel islands in the pixel island group are turned on, so that the cathodes of the pixel islands in the pixel island group are turned on.

10. The driving method of the stretchable display module according to claim 9, characterized in that: When in the stretched state, the first isolation structure between the pixel islands in the pixel island group is at least partially disconnected, including: The deformation degree of the stretchable display module is obtained, and according to the deformation degree, the number of disconnections of the first isolation structure between the pixel islands in the pixel island group is determined.

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