Display panel and display device

Abstract

The invention discloses a display panel and a display device.The display panel is provided with a plurality of pixel island areas and stretchable areas located between every two adjacent pixel island areas, and the display panel comprises a substrate, a pixel circuit layer and a light-emitting layer which are sequentially arranged in a stacked mode; the pixel island area comprises a plurality of pixel units arranged in the light emitting layer and a plurality of pixel circuits arranged in the pixel circuit layer and used for driving the pixel units; the stretchable area comprises stretchable wires which are arranged in the pixel circuit layer and are electrically connected with pixel circuits in two adjacent pixel island areas; wherein the pixel island area comprises a first sub-area, a plurality of pixel circuits arranged in the pixel island area are all arranged in the first sub-area, and the stretchable area extends to the position between every two adjacent pixel units in the pixel island area. According to the scheme, the stretch rate of the display panel can be increased.

Description

Technical Field

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

[0002] With the continuous development of display technology, many manufacturers have developed stretchable display panels in recent years. Stretchable display panels refer to panels whose length can be increased in one or more dimensions, which is a current research hotspot. The applicant of this application found that the stretchability of current stretchable display panels needs to be further improved. Summary of the invention

[0003] The present application provides a display panel and a display device, which can improve the stretchability of the display panel.

[0004] According to a first aspect of an embodiment of the present application, there is provided a display panel, wherein the display panel is provided with a plurality of pixel island regions and a stretchable region located between two adjacent pixel island regions, the display panel comprising a substrate, a pixel circuit layer and a light-emitting layer stacked in sequence; the pixel island region comprises a plurality of pixel units arranged in the light-emitting layer and a plurality of pixel circuits arranged in the pixel circuit layer and used to drive the plurality of pixel units; the stretchable region comprises a stretchable trace arranged in the pixel circuit layer and electrically connecting the pixel circuits in two adjacent pixel island regions; wherein the pixel island region comprises a first sub-region, the plurality of pixel circuits arranged in the pixel island region are all arranged in the first sub-region, and the stretchable region extends to between two adjacent pixel units in the pixel island region.

[0005] A second aspect of an embodiment of the present application provides a display device, which includes the display panel in any one of the above-mentioned implementations.

[0006] The beneficial effect is: the multiple pixel circuits included in the pixel island area of ​​the present application are arranged in the same sub-area, so that the stretchable area can be extended to between two adjacent pixel units in the pixel island area, so that more space can be allocated to the stretchable area, thereby improving the stretching rate of the display panel or a higher PPI. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] 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 are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0008] Figure 1It is a schematic structural diagram of a pixel island region and a stretchable region in an embodiment of a display panel of the present application;

[0009] Figure 2 is a simple cross-sectional view of an embodiment of a display panel of the present application;

[0010] Figure 3 yes Figure 1 A schematic diagram of a specific structure of a middle pixel island region in one embodiment;

[0011] Figure 4 yes Figure 1 A schematic diagram of a specific structure of a mid-pixel island region in another embodiment;

[0012] Figure 5 is a schematic structural diagram of a pixel island region and a stretchable region in another embodiment of a display panel of the present application;

[0013] Figure 6 is a schematic structural diagram of a pixel island region and a stretchable region in another embodiment of a display panel of the present application;

[0014] Figure 7 It is a structural schematic diagram of a pixel island region and a stretchable region in a display panel in the related art;

[0015] Figure 8 yes Figure 7 Schematic diagram of the structure of the repeating unit. DETAILED DESCRIPTION

[0016] 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.

[0017] It should be noted that the terms "first" and "second" 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" and "second" can explicitly 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 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 that includes a series of steps or units is not limited to the listed steps or units, 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.

[0018] See also Figure 1 In one embodiment of the present application, the display panel 100 is provided with a plurality of pixel island regions 11 and a stretchable region 12 located between two adjacent pixel island regions 11. The pixel island region 11 is a rigid region and is the effective display area of ​​the display panel 100. The stretchable region 12 connects two adjacent pixel island regions 11 and is a stretchable or bendable region. Because of the setting of the stretchable region 12, the display panel 100 is a stretchable display panel. At the same time, the display panel 100 can be an LCD display panel (Liquid Crystal Display), an OLED display panel (Organic Light-Emitting Diode), or a Mirco-LED display panel (Micro Light Emitting Diode). The present application does not limit the specific type of the display panel 100.

[0019] Combination Figure 1 , Figure 2 as well as Figure 3 The display panel 100 further includes a substrate 110, a pixel circuit layer 120 and a light emitting layer 130 which are stacked in sequence. The substrate 110 is a flexible substrate to ensure that the display panel 100 can be stretched. In one application scenario, the material of the substrate 110 includes polyimide (PI). The pixel circuit layer 120 includes a pixel circuit 121, and the pixel circuit 121 can be a circuit structure such as 7T1C. The light emitting layer 130 includes a pixel unit 131, and the pixel unit 131 includes at least one sub-pixel 1311. For example, in one application scenario, the pixel unit 131 includes three sub-pixels 1311, and the three sub-pixels 1311 are respectively a red sub-pixel, a green sub-pixel and a blue sub-pixel. In another application scenario, the pixel unit 131 includes four sub-pixels 1311, and the four sub-pixels 1311 are respectively a red sub-pixel, a green sub-pixel and two blue sub-pixels. The present application does not limit the structure of the pixel unit 131. At the same time, the structures of different pixel units 131 can be the same or different. Among them, one pixel circuit 121 drives one sub-pixel 1311 to emit light, or one pixel circuit 121 can also drive multiple sub-pixels 1311 to emit light at the same time, for example, one pixel circuit 121 drives two sub-pixels 1311 to emit light at the same time.

[0020] See also Figure 2 as well as Figure 3The pixel island region 11 includes a plurality of pixel units 131 arranged in the light-emitting layer 130 and a plurality of pixel circuits 121 arranged in the pixel circuit layer 120 and used to drive the plurality of pixel units 131, that is, the pixel island region 11 includes a plurality of pixel units 131 and a plurality of pixel circuits 121 for driving the sub-pixels 1311 in the plurality of pixel units 131 to emit light. In one application scenario, when a pixel circuit 121 can only drive one sub-pixel 1311 to emit light, the sub-pixels 1311 and the pixel circuit 121 included in the pixel island area 11 are electrically connected one by one, that is, the number of sub-pixels 1311 and the pixel circuit 121 are equal. For example, the pixel island area 11 includes 4 pixel units 131, and each pixel unit 131 includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, that is, when the pixel island area 11 includes 12 sub-pixels 1311, the pixel island area 11 also includes 12 pixel circuits 121; in another application scenario, when a pixel circuit 121 can drive multiple sub-pixels 1311 to emit light at the same time, the number of pixel circuits 121 included in the pixel island area 11 is less than the number of sub-pixels 1311 included. That is to say, a pixel circuit 121 in the pixel island area 11 can only drive one sub-pixel 1311, or a pixel circuit 121 can drive multiple sub-pixels 1311 at the same time, which is specifically set according to actual needs.

[0021] Combined with Figure 1 The stretchable region 12 includes a stretchable trace 1201 disposed in the pixel circuit layer 120 and electrically connecting the pixel circuits 121 in two adjacent pixel island regions 11. When the display panel 100 is not in a stretched state, the stretchable trace 1201 is in a curved structure. The number of stretchable traces 1201 between two adjacent pixel island regions 11 may be one or more, and this application does not limit this.

[0022] Combination Figure 1 as well as Figure 3 In the present embodiment, the pixel island region 11 includes a first sub-region 111, and the plurality of pixel circuits 121 arranged in the pixel island region 11 are all arranged in the first sub-region 111, that is, the plurality of pixel circuits 121 included in the pixel island region 11 are arranged in the same sub-region. Because the plurality of pixel circuits 121 are all arranged in the first sub-region 111, the stretchable region 12 can be extended to between two adjacent pixel units 131 in the pixel island region 11, so that more space can be allocated to the stretchable region 12, thereby improving the stretching rate of the display panel 100 or a higher PPI (Pixels Per Inch, pixel density).

[0023] It can be understood that, since the stretchable region 12 extends between two adjacent pixel units 131 in the pixel island region 11, the edge of the pixel island region 11 is not in a straight line shape.

[0024] It can be understood that, through the above-mentioned setting, there may be a situation where the pixel unit 131 and the pixel circuit 121 driving it are not in the same sub-region. In order to better connect the pixel unit 131 and the pixel circuit 121 and reduce the difficulty of wiring, the present application also provides a connecting layer (not shown) located between the pixel circuit layer 120 and the light-emitting layer 130, and the pixel island area 11 includes a connecting line (not shown) located in the connecting layer, and the connecting line electrically connects the pixel unit 131 and the pixel circuit 121.

[0025] Of course, in other implementations, the pixel circuit 121 may also be electrically connected to the pixel unit 131 through wiring in the pixel circuit layer 120 , which is specifically configured according to design requirements.

[0026] See also Figure 3 In one embodiment, the first sub-region 111 is centered in the pixel island region 11 to reduce the difficulty of routing and ensure product yield. In other embodiments, the first sub-region 111 may also be non-centered in the pixel island region 11, which can be specifically set according to actual needs.

[0027] See also Figure 3 In one embodiment, the second sub-region 112 where the pixel unit 131 is located is not centrally arranged in the pixel island region 11 to make room for the first sub-region 111, thereby reducing the difficulty of wiring and improving product yield.

[0028] Continue reading Figure 3 The second sub-regions 112 where the plurality of pixel units 131 are located are distributed around the first sub-region 111 to facilitate setting of wiring electrically connecting the pixel units 131 and the pixel circuit 121 .

[0029] In one embodiment, in order to ensure the compactness of the structure, the second sub-region 112 where the plurality of pixel units 131 are located overlaps with the first sub-region 111, thereby freeing up more space for the stretchable region 12 and further improving the stretchability of the display panel 100. In other embodiments, the second sub-region 112 where some pixel units 131 are located may overlap with the first sub-region 111, while the second sub-region 112 where some pixel units 131 are located may not overlap with the first sub-region 111.

[0030] See also Figure 1In one embodiment, a plurality of pixel island regions 11 are arranged in an array to ensure the neatness of the arrangement, facilitate the internal wiring of the display panel 100, avoid short circuits, open circuits, etc., and ensure display quality.

[0031] In one embodiment, the structure of each pixel island region 11 is the same to ensure display uniformity, for example, each pixel island region 11 includes the same number of pixel units 131 and the same number of pixel circuits 121. Of course, in other embodiments, the structures of different pixel island regions 11 may also be different, for example, one pixel island region 11 includes 4 pixel units 131, while another pixel island region 11 includes 3 pixel units 131. In short, it can be set according to actual needs, and this application does not limit this.

[0032] See also Figure 1 The stretchable region 12 includes three types of regions, namely region a, region b and region c. Region a does not have the stretchable wiring 1201, so its stretching rate is only limited by the film layer material. Region b and region c have the stretchable wiring 1201, so the stretching rates of the two are limited by both the film layer material and the stretchable wiring 1201. At the same time, since the extension direction of region b is consistent with the extension direction of the included stretchable wiring 1201, and the extension direction of region c is inconsistent with the extension direction of the included stretchable wiring 1201, the stretching rate of region c is smaller than that of region b, and the stretching rate of region b is smaller than that of region a.

[0033] See also Figure 1 as well as Figure 3 In one embodiment, the plurality of pixel units 131 in the pixel island region 11 are arranged in an array, which can ensure the neatness of the arrangement, facilitate the internal wiring of the display panel 100, avoid short circuits, open circuits, etc., and ensure the uniformity of the display.

[0034] In an application scenario, such as Figure 3 As shown, the pixel island region 11 includes four pixel units 131, and the four pixel units 131 are arranged in two rows and two columns.

[0035] exist Figure 3 In the application scenario, the first sub-region 111 is arranged between the second sub-region 112 where the first row of pixel units 131 is located and the second sub-region 112 where the second row of pixel units 131 is located, and is further located between the second sub-region 112 where the first column of pixel units 131 is located and the second sub-region 112 where the second column of pixel units 131 is located.

[0036] In another application scenario, Figure 4As shown, the pixel island area 11 includes 6 pixel units 131, and the 6 pixel units 131 are arranged in three rows and two columns. In other application scenarios, the 6 pixel units 131 can also be arranged in two rows and three columns.

[0037] When the six pixel units 131 are arranged in three rows and two columns, the first sub-region 111 is disposed between the second sub-region 112 where the second row and first column pixel units 131 are located and the second sub-region 112 where the second row and second column pixel units 131 are located.

[0038] When the six pixel units 131 are arranged in two rows and three columns, the first sub-region 111 is disposed between the second sub-region 112 where the first row and second column pixel units 131 are located and the second sub-region 112 where the second row and second column pixel units 131 are located. It should be noted that the present application does not limit the number of pixel units 131 included in the pixel island region 11. For example, in other application scenarios, the pixel island region 11 may include 2, 3, 5, or other numbers of pixel units 131.

[0039] Combination Figure 1 as well as Figure 3 It can be seen that in the pixel island area 11, the pixel unit 131 can also be moved to the edge position of the pixel island area 11, so as to achieve the purpose of compressing the width of area a and increasing the width of area b, thereby increasing the length of the stretchable trace 1201 and further improving the stretching rate of the display panel 100.

[0040] See also Figure 3 as well as Figure 4 In one embodiment, the plurality of pixel circuits 121 in the pixel island region 11 are arranged in an array, which reduces the complexity of routing and ensures product yield.

[0041] In one application scenario, the plurality of pixel circuits 121 in the pixel island region 11 are arranged in a plurality of rows and columns, for example Figure 3 In the pixel island region 11, the plurality of pixel circuits 121 are arranged in two rows and six columns. Figure 4 In the embodiment, the plurality of pixel circuits 121 in the pixel island region 11 are arranged in three rows and six columns.

[0042] In another application scenario, Figure 5 As shown, a plurality of pixel circuits 121 in the pixel island region 11 are arranged in a row. Figure 3 , Figure 4 Compared with the application scenario in , the height of area b can be increased (the height of area b refers to the length of area b in the second direction Y) to achieve the growth of the stretchable trace 1201, and ultimately achieve a higher stretching rate and a higher PPI.

[0043] In other application scenarios, the multiple pixel circuits 121 in the pixel island area 11 may also be arranged in a row.

[0044] In one embodiment, see Figure 6 , the corner of the pixel island region 11 is an arc angle. Specifically, the stretching rates of the three regions a, b and c are different, and the corner of the pixel island region 11 is the junction of different regions. Therefore, in order to avoid the sudden change of the stretching rate at the junction of different regions and relieve the pressure of the stretched film material, the corner of the pixel island region 11 is rounded (it can be rounded or elliptical) to make it an arc angle.

[0045] Of course, in other embodiments, the corners of the pixel island region 11 may also be right angles, such as Figure 3 , Figure 4 as well as Figure 5 As shown, no limitation is given here.

[0046] Continue reading Figure 1 as well as Figure 3 In one embodiment, along the circumference of the pixel island region 11, a stretchable region 12 is distributed between any two adjacent pixel units 131, so that the stretching rate around the pixel island region 11 can be consistent, the stretching uniformity can be ensured, and the stretching rate of the display panel 100 can be improved. In other embodiments, a stretchable region 12 may be distributed between some two adjacent pixel units 131, and a stretchable region 12 may not be provided between some two adjacent pixel units 131, and the specific selection can be made according to actual needs.

[0047] Continue reading Figure 1 , along the circumference of the pixel island area 11, stretchable wiring 1201 is distributed between any two adjacent pixel units 131 to disperse the stretchable wiring 1201 and reduce the difficulty of wiring. In other embodiments, stretchable wiring 1201 may be distributed between some two adjacent pixel units 131, and no stretchable wiring 1201 may be provided between some two adjacent pixel units 131, and the specific selection can be made according to actual needs.

[0048] At the same time from Figure 1 It can be seen that the display panel 100 can be stretched in the first direction X and can also be stretched in the second direction Y, so the display panel 100 can be stretched in two directions.

[0049] In one embodiment, the first stretching rate of the display panel 100 in the first direction X is equal to the second stretching rate in the second direction Y; in another embodiment, the first stretching rate of the display panel 100 in the first direction X is not equal to the second stretching rate in the second direction Y, which can be set according to actual needs.

[0050] In other embodiments, the first direction X and the second direction Y may not be two perpendicular directions.

[0051] Combination Figure 7 as well as Figure 8 In the related art, in the pixel island region 11, the pixel circuit 121 is located below the corresponding pixel unit 131 ( Figure 7 as well as Figure 8 The pixel circuit 121 is schematically shown), that is, the sub-region occupied by the pixel circuit 121 is located in the sub-region occupied by the pixel unit 131), and the second sub-region 112 occupied by the pixel unit 131 is surrounded by the annular packaging region 113, and the pixel island region 11 is generally rectangular. In the related art, taking the PPI of the display panel 100 as 100, the size of the repeating unit P (the number of repeating units P is multiple, and each repeating unit P includes a pixel island region 11 and a stretchable region 12 located outside the pixel island region 11) is 254um×254um, the size of the area occupied by the pixel circuit 121 in the pixel island region 11 is 60×60um, the size of the area occupied by the pixel unit 131 is 80×80um, and the width H of the packaging region 113 is 50um. It can be calculated that the width of the stretchable region 12 is 74um. When a semicircular arc-shaped stretchable trace 1201 is set in the stretchable region 12, the length of a single semicircular arc-shaped stretchable trace 1201 is πR, and the stretchable ratio of the stretchable trace 1201 is: πR / 2R=π / 2≈1.57. After stretching, the width of the stretchable region 12 can be changed to 116um (74×1.57=116um), and a stretching length of 42um (116um-74um=42um) can be achieved, and the stretching rate is 16.5% (43 / 254=16.5%). Figure 1 In one embodiment of the present application, the height of region b can reach 288um. After stretching, the height of region b can reach 452um (288um×1.57=452um), and a stretching length of 164um (452um-288um=164um) can be achieved. The stretching rate is 32%. Compared with the related art, the stretching rate can be increased to 2 times.

[0052] Therefore, through the solution of the present application, the stretching rate of the display panel 100 can be increased, or the PPI of the display panel 100 can be increased when the stretching rate remains unchanged.

[0053] In addition, the present application also protects a display device, which includes a display panel in any of the above embodiments. The specific structure of the display device can be found in the above content and will not be described again here.

[0054] The display device may be any device such as a mobile phone, a computer, a television, etc., and is not limited here.

[0055] The above description is only an embodiment of the present application and does not limit the patent 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 display panel, characterized in that: The display panel is provided with a plurality of pixel island regions and a stretchable region located between two adjacent pixel island regions, and the display panel comprises a substrate, a pixel circuit layer and a light emitting layer which are stacked in sequence; The pixel island region includes a plurality of pixel units disposed in the light emitting layer and a plurality of pixel circuits disposed in the pixel circuit layer and used to drive the plurality of pixel units; The stretchable region includes a stretchable trace that is disposed in the pixel circuit layer and electrically connects the pixel circuits in two adjacent pixel island regions; The pixel island region includes a first sub-region, the multiple pixel circuits arranged in the pixel island region are all arranged in the first sub-region, and the stretchable region extends between two adjacent pixel units in the pixel island region.

2. The display panel according to claim 1, characterized in that: The first sub-region is centrally arranged in the pixel island region, or non-centrally arranged; Preferably, the second sub-region where the pixel unit is located is non-centrally arranged in the pixel island region; Preferably, the second sub-regions where the plurality of pixel units are located are arranged at the periphery of the first sub-region, or the second sub-regions where the plurality of pixel units are located overlap with the first sub-region.

3. The display panel according to claim 1, characterized in that: The plurality of pixel units in the pixel island region are arranged in an array; Preferably, the pixel island area includes four pixel units, and the four pixel units are arranged in two rows and two columns; Preferably, the first sub-region is arranged between the second sub-region where the pixel units in the first row are located and the second sub-region where the pixel units in the second row are located, and is further located between the second sub-region where the pixel units in the first column are located and the second sub-region where the pixel units in the second column are located; Alternatively, the pixel island area includes 6 pixel units, and the 6 pixel units are arranged in three rows and two columns or two rows and three columns; Preferably, when the six pixel units are arranged into three rows and two columns, the first sub-region is set between the second sub-region where the pixel unit in the second row and the first column is located and the second sub-region where the pixel unit in the second row and the second column is located; when the six pixel units are arranged into two rows and three columns, the first sub-region is set between the second sub-region where the pixel unit in the first row and the second column is located and the second sub-region where the pixel unit in the second row and the second column is located.

4. The display panel according to claim 1, characterized in that: The plurality of pixel circuits in the pixel island region are arranged in an array; Preferably, the plurality of pixel circuits in the pixel island region are arranged in multiple rows and columns, or the plurality of pixel circuits in the pixel island region are arranged in one row or one column.

5. The display panel according to claim 1, characterized in that: The corners of the pixel island area are arc angles.

6. The display panel according to claim 1, characterized in that: Along the circumference of the pixel island area, the stretchable area is distributed between any two adjacent pixel units; Preferably, along the circumference of the pixel island region, the stretchable wiring is distributed between any two adjacent pixel units.

7. The display panel according to claim 1, characterized in that: The display panel further includes a connection layer located between the pixel circuit layer and the light emitting layer, the pixel island region includes a connection wire located in the connection layer, and the connection wire electrically connects the pixel unit and the pixel circuit; Preferably, a first stretching rate of the display panel in a first direction is equal to or different from a second stretching rate in a second direction, and the second direction intersects with the first direction; Preferably, the first direction is perpendicular to the second direction.

8. The display panel according to claim 1, characterized in that: The plurality of pixel units in the pixel island region include a plurality of sub-pixels, and one pixel circuit in the pixel island region drives one sub-pixel, or one pixel circuit drives a plurality of sub-pixels simultaneously.

9. The display panel according to claim 1, characterized in that: The plurality of pixel island regions are arranged in an array; Preferably, the structure of each of the pixel island regions is the same.

10. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 9.

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