Display panel and display device

Abstract

The present application provides a display panel and a display device, wherein the display panel includes a regular display area and an irregular display area, the display panel also includes a first substrate and a second substrate arranged opposite to each other, a liquid crystal layer located between the first substrate and the second substrate, and a heating electrode layer stacked with the liquid crystal layer, the heating electrode layer includes a plurality of first heating lines in the irregular display area, the plurality of first heating lines are respectively connected between first electrode lines and second electrode lines, the first electrode lines and the second electrode lines are used to be applied with different voltages, at least one of the plurality of first heating lines serves as a target heating line, the target heating line has a first sub-segment and a second sub-segment, the resistance per unit length of the first sub-segment is less than the resistance per unit length of the second sub-segment, the first sub-segment is closer to the regular display area than the second sub-segment, so that when there is greater heat dissipation at a position away from the regular display area, the heating uniformity at different positions of the irregular display area is improved.

Description

Technical Field

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

[0002] With the continuous development of display technology, people's requirements for display devices are becoming increasingly higher. In some special application areas, when the display device is started up in low temperatures, it is expected that the display can quickly resume normal operation. In other words, the display device must have a fast response time at low temperatures. However, existing technologies have the problem of uneven temperature within the display device when responding at low temperatures. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a display panel and a display device to improve the temperature uniformity within the display device. The specific solution is as follows:

[0004] In a first aspect, the present application provides a display panel comprising a regular display area and a special-shaped display area, the display panel further comprising:

[0005] a first substrate and a second substrate arranged opposite to each other;

[0006] a liquid crystal layer located between the first substrate and the second substrate;

[0007] a heating electrode layer stacked with the liquid crystal layer, the heating electrode layer comprising a plurality of first heating lines in the special-shaped display area, the plurality of first heating lines being respectively connected between first electrode lines and second electrode lines, the first electrode lines and the second electrode lines being configured to be applied with different voltages;

[0008] At least one of the multiple first heating lines serves as a target heating line, and the target heating line has a first sub-segment and a second sub-segment, the resistance per unit length of the first sub-segment is smaller than the resistance per unit length of the second sub-segment, and the first sub-segment is closer to the regular display area than the second sub-segment.

[0009] In a second aspect, an embodiment of the present application further provides a display device comprising the display panel.

[0010] The embodiments of the present application provide a display panel and a display device, wherein the display panel includes a regular display area and an irregular display area, the display panel further includes a first substrate and a second substrate arranged opposite to each other, a liquid crystal layer located between the first substrate and the second substrate, and a heating electrode layer stacked with the liquid crystal layer, the heating electrode layer can heat the liquid crystal layer, the heating electrode layer includes a plurality of first heating lines in the irregular display area, the plurality of first heating lines are respectively connected between the first electrode line and the second electrode line, the first electrode line and the second electrode line are used to be applied with different voltages, so that the heating electrode layer generates heat when energized, at least one of the plurality of first heating lines serves as a target heating line, the target heating line has a first sub-line segment and a second sub-line segment, and the unit of the first sub-line segment The resistance of the length is smaller than the resistance per unit length of the second sub-line width, and the first sub-line segment is closer to the regular display area than the second sub-line segment. That is to say, for the first heating line in the special-shaped display area, the same first heating line may have a non-uniform resistance per unit length. The first sub-line segment close to the regular display area has a smaller resistance per unit length, while the second sub-line segment away from the regular display area has a larger resistance per unit length. In this way, when the same current is applied at different positions of the same heating line, the second sub-line segment away from the regular display area has a larger heating power than the first sub-line segment close to the regular display area. When the position away from the regular display area has a larger heat dissipation, the heating uniformity at different positions of the special-shaped display area is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application is shown;

[0013] Figure 2 Shown Figure 1 The cross-sectional view of the display panel along the CC direction is shown;

[0014] Figure 3-10 Shows a schematic structural diagram of various display panels provided in embodiments of the present application;

[0015] Figure 11 A schematic structural diagram of a display device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0018] Secondly, this application is described in detail with reference to schematic diagrams. When describing the embodiments of this application, for ease of explanation, cross-sectional views of device structures may be partially enlarged and not to scale. Furthermore, these schematic diagrams are merely illustrative and should not limit the scope of protection of this application. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0019] As described in the background technology, with the continuous development of display technology, people have higher and higher requirements for display devices. In some special display device use areas, when the display device is started at low temperature, it is hoped that the display can quickly meet the requirements of normal operation, that is, the display device is required to respond quickly at low temperatures. However, the current existing technology has the problem of uneven temperature in the display device when responding at low temperatures. In actual operation, the rapid response of the display device at low temperatures can be achieved by adding heating electrodes to the display device. The heating electrode is usually set in the display area. Since the edge of the display area, especially the irregular edge of the display area, is close to the edge of the display device, and the irregular edge has a long extension path, the edge of the display area is in contact with the outside world and the heat conduction is fast. The irregular edge conducts heat even faster, resulting in a lower temperature near the irregular edge of the display area, and a higher temperature near the center of the display area. The temperature difference between different positions of the display area is large, which can easily cause poor display of the display panel.

[0020] Based on the above technical problems, the embodiments of the present application provide a display panel and a display device, wherein the display panel includes a regular display area and an irregular display area, the display panel also includes a first substrate and a second substrate arranged opposite to each other, and also includes a liquid crystal layer located between the first substrate and the second substrate, and a heating electrode layer stacked with the liquid crystal layer, the heating electrode layer can heat the liquid crystal layer, the heating electrode layer includes a plurality of first heating lines in the irregular display area, the plurality of first heating lines are respectively connected between the first electrode lines and the second electrode lines, the first electrode lines and the second electrode lines are used to be applied with different voltages, so that the heating electrode layer generates heat when energized, at least one of the plurality of first heating lines serves as a target heating line, the target heating line has a first sub-line segment and a second sub-line segment, the first sub-line The resistance per unit length of the segment is smaller than the resistance per unit length of the second sub-line width, and the first sub-line segment is closer to the regular display area than the second sub-line segment. That is to say, for the first heating line in the special-shaped display area, the same first heating line may have a non-uniform resistance per unit length. The first sub-line segment close to the regular display area has a smaller resistance per unit length, while the second sub-line segment away from the regular display area has a larger resistance per unit length. In this way, when the same current is applied at different positions of the same heating line, the second sub-line segment away from the regular display area has a larger heating power than the first sub-line segment close to the regular display area. When the heat dissipation is greater at the position away from the regular display area, the heating uniformity at different positions of the special-shaped display area is improved.

[0021] In order to better understand the technical solutions and technical effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.

[0022] refer to Figure 1 and Figure 2 FIG. 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. Figure 2 for Figure 1 The cross-sectional view of the display panel in the CC direction in FIG. 1 shows the display panel 10 including a display area AA and a non-display area NA surrounding the display area. The display area AA is provided with display elements (also referred to as pixel elements) for displaying the content to be displayed. The display elements may be, for example, liquid crystal display elements. The display elements are arranged in an array in the display panel 10. The arrayed display elements constitute a pixel array. The non-display area NA is used to set a circuit structure for driving the display panel 10 for display. The non-display area NA generally includes a border area outside the display area AA, and the border area surrounds the display area AA. The display area AA may include only an area with display elements, or may include a narrower edge area outside the area with display elements.

[0023] When the display unit is a liquid crystal display element, the display panel 10 serves as a liquid crystal display panel, and the display including the liquid crystal display panel serves as a liquid crystal display. Liquid crystal displays (LCDs) are increasingly widely used due to their advantages such as low power consumption, miniaturization, and thinness. However, the performance of liquid crystals in LCDs is significantly affected by temperature. In subzero environments, the viscosity of the liquid crystal increases due to the drop in temperature, which increases the liquid crystal reaction time, slows the response speed, and causes sluggish or even nonexistent display.

[0024] Due to the diverse shapes and functions of the display panel 10, the shape of the display area AA is often not regular, but rather an irregular shape determined by the shape of the display panel 10 and the shapes of other components in the display panel 10. For example, the display panel 10 may have rounded corners, causing the display area AA to also have rounded corners, or the display panel 10 may be provided with components such as a camera, and the display area AA may be adjacent to these components, resulting in an "irregular" shape.

[0025] Therefore, in the embodiment of the present application, the display area AA can be divided into a regular display area AA2 and an irregular display area AA1. The regular display area AA2 and the irregular display area AA1 together constitute the display area. The number of regular display areas AA2 can be one or more, and the number of irregular display areas AA1 can be one or more.

[0026] As a partitioning principle, one or more regular display areas AA2 can be divided in the display area, and the area outside the regular display area AA2 can be used as the irregular display area AA1. When dividing, the number of regular display areas AA2 can be set as small as possible and the area can be as large as possible. As another partitioning principle, the display elements in the display panel 10 are arranged in an array along a first direction, and the line segment in the first direction can be used as the dividing line between the regular display area AA2 and the irregular display area AA1. Figure 1 As shown, the display elements are arranged in an array along a first direction and a second direction, the first direction is the column direction, recorded as the Y direction, and the second direction is the row direction, recorded as the X direction. Figure 1 The boundary line between the regular display area AA2 and the special-shaped display area AA1 in A is along the second direction. Figure 1 The boundary line between the regular display area AA2 and the irregular display area AA1 in B is along the first direction.

[0027] The special-shaped display area AA1 can be located at a position such as the R corner or bevel corner of the display panel 10, that is, the corner area 1001. The special-shaped display area AA1 can also include a position such as a groove NA1, that is, the groove area 1002. The shape of the groove NA1 can be circular, polygonal or other shapes. The special-shaped display area AA1 can also include a strip structure of at least one of the corner area 1001 and the groove area 1002. The shape of the regular display area AA2 is a circular surface structure or a polygonal surface structure. For example, the shape of the regular display area AA2 is a rectangular structure. The shape of the special-shaped display area AA1 can be various, for example, it can be a polygon, an arc, an annular shape, or other irregular shapes, such as a strip with rounded corners on at least one side. For example, the special-shaped display area AA1 can extend along an arc-shaped bending path to form a semicircle or a quarter-circle ring. For the corner area 1001 and the groove area 1002, there can be different display area division methods to set these two areas separately, which will be explained later with different embodiments.

[0028] The light emitting direction of the display panel 10 is denoted as Z direction. Figure 2 As shown, the display panel 10 may include a first substrate 10 and a second substrate 20 disposed opposite each other. The first substrate 10 may be an array substrate, and the second substrate 20 may be a cell substrate, or the first substrate 10 may be a cell substrate, and the second substrate 20 may be an array substrate. The array substrate may include thin film transistors, pixel electrodes, and common electrodes. The pixel electrodes and common electrodes may be arranged in the same layer with intervals, or may be arranged in different layers. The cell substrate includes a color filter layer.

[0029] The display panel 10 may further include a liquid crystal layer 30 positioned between the first substrate 10 and the second substrate 20, and a heating electrode layer stacked with the liquid crystal layer 30. The heating electrode layer is used to heat the liquid crystal layer 30. The heating electrode layer may be positioned on a side of the first substrate 10 or the second substrate 20 away from the liquid crystal layer 30, or on a side of the first substrate 10 or the second substrate 20 closer to the liquid crystal layer 30. The heating electrode layer may be positioned only on the first substrate 10 or the second substrate 20, or on both the first substrate 10 and the second substrate 20. A thermally conductive insulating layer 13 may also be positioned between the heating electrode layer and the liquid crystal layer 30 to prevent bad pixels in the display panel 10 caused by direct heating of the liquid crystal layer 30 by the heating electrode layer. The heating electrode layer is a patterned electrode layer, with insulating material positioned between the patterned electrode layers.

[0030] The heating electrode layer in the irregular display area AA1 includes a plurality of first heating lines 11. The plurality of first heating lines 11 are connected between first and second electrode lines, respectively. The first and second electrode lines are configured to be applied with different voltages. This allows for a voltage difference between the first and second electrode lines, resulting in heat generation. The first and second electrode lines are designated V1 and V2, respectively. The first and second electrode lines V1 and V2 are designated with the higher voltage (VGH) applied to them as high-voltage lines, while the lower voltage (VGL) applied to them as low-voltage lines. The first and second electrode lines V1 and V2 are also referred to as heating terminals. Because the extension direction of the first heating lines 11 is often related to the shape of the irregular display area AA1, the first heating lines 11 have portions near the edges of the display panel 10 and portions near the center of the display panel 10. Locations near the edges of the display panel 10 typically dissipate more heat, requiring the first heating lines 11 in these locations to have higher heating efficiency to maintain roughly the same temperature across the irregular display area AA1.

[0031] Since the irregular display area AA1 is closer to the edge of the display panel 10 than the regular display area AA2, the position close to the edge of the display panel 10 is often farther from the regular display area AA2, while the portion close to the center of the display panel 10 is often closer to the regular display area AA2. Therefore, at least one of the multiple first heating lines 11 can be used as a target heating line. The target heating line has a first sub-segment and a second sub-segment. The first sub-segment is closer to the regular display area AA2 than the second sub-segment, and the resistance per unit length of the first sub-segment is smaller than the resistance per unit length of the second sub-segment. For example, the line width of the first sub-segment is larger than the line width of the second sub-segment, or the square resistance of the first sub-segment is smaller than the square resistance of the second sub-segment. Since the first sub-segment and the second sub-segment belong to the same target heating line, having the same material and thickness is more conducive to saving manufacturing costs. Therefore, the first sub-segment and the second sub-segment can be set to have the same material and thickness, and the line width of the first sub-segment is larger than the line width of the second sub-segment.

[0032] That is to say, for the first heating line 11 of the irregular display area AA1, the same first heating line 11 may have a non-uniform resistance per unit length, the first sub-segment close to the regular display area AA2 has a smaller resistance per unit length, and the second sub-segment away from the regular display area AA2 has a larger resistance per unit length. In this way, when the same current is applied at different positions of the same heating line, the second sub-segment away from the regular display area AA2 has a greater heating power than the first sub-segment close to the regular display area AA2. When the position away from the regular display area AA2 has greater heat dissipation, the heating uniformity at different positions of the irregular display area AA1 is improved.

[0033] The heating electrode layer can be made of a transparent conductor such as ITO or IZO, or a metal. A transparent and conductive heating electrode layer minimizes the impact on the display quality of the display panel 10. The heating electrode layer can be located on the same layer as at least one of the electrodes, pixel electrodes, and common electrodes in the thin-film transistors on the array substrate, thereby reusing existing masks.

[0034] The relative ratio of the line width of the first sub-segment and the line width of the second sub-segment can be determined according to actual conditions. For example, the line width of the first sub-segment can be 5 to 1000 times the line width of the second sub-segment, so that the existence of the first sub-segment can effectively reduce the resistance of the target heating line, and the position where the second sub-segment is located can have a larger partial pressure, thereby achieving a larger heating power at the position where the second sub-segment is located.

[0035] In the examples of this application, reference Figure 2 As shown, the heating electrode layer can include multiple second heating lines 12 in the regular display area AA2. The multiple second heating lines 12 are respectively connected between the first electrode line V1 and the second electrode line V2. That is, the first heating line 11 and the second heating line 12 can be connected to the same heating terminal. In this way, when different voltages are applied to the first electrode line V1 and the second electrode line V2, the second heating line 12 can have a voltage difference, thereby generating heat. The multiple second heating lines 12 can be arranged in parallel. The arrangement direction of the multiple second heating lines 12 is recorded as the first direction. That is, the multiple second heating lines 12 extend in a direction perpendicular to the first direction. The direction perpendicular to the first direction is recorded as the second direction. The first electrode line V1 and the second electrode line V2 both have portions located on both sides of the second heating line 12.

[0036] In actual operation, for the sake of wiring rationality, generally speaking, multiple first electrode lines V1 can also be arranged along the first direction. In other words, the arrangement direction of the multiple first electrode lines V1 is recorded as the first direction, so that the first electrode line V1 and the second electrode line V2 have parts located on both sides of the first heating line 11, and the multiple first heating lines 11 can be connected to different positions of the first electrode line V1 and different positions of the second electrode line V2.

[0037] Based on the different ways of dividing the regular display area AA2 and the irregular display area AA1, the regular display area AA2 and the irregular display area AA1 can have various relative positions. In specific operation, the areas can be divided according to the shape characteristics of the display panel 10.

[0038] As a possible implementation, the regular display area AA2 and the irregular display area AA1 may be arranged along the first direction, referring to Figure 3-Figure 9As shown, the first direction is the Y direction, and the second direction is the X direction. It can be seen from the figure that in the plane formed by the X direction and the Y direction, the special-shaped display area AA1 is located above the regular display area AA2. When the regular display area AA2 and the special-shaped display area AA1 can be arranged along the first direction, the first heating line 11 and the second heating line 12 are independent of each other. This partitioning method can be used for the case where the display panel 10 includes a groove area 1002. According to this partitioning method, the setting method of the first heating line 11 in the groove area 1002 can be determined. Taking the shape of the regular display area AA2 as a rectangle as an example, some of the first electrode lines V1 and the second electrode lines V2 on both sides of the multiple second heating lines 12 are arranged in parallel and extend along the first direction. The lengths of the multiple second heating lines 12 can be set to be basically the same. The extension directions of some of the first electrode lines V1 and some of the second electrode lines V2 on both sides of the multiple first heating lines 11 can be determined according to the shape of the special-shaped display area AA1, that is, the two can be arranged in parallel. Refer to Figure 3-Figure 9 As shown, it can also be arranged non-parallel (not shown, refer to Figure 10 ). The lengths of the plurality of first heating lines 11 are usually different, refer to Figure 3-Figure 9 shown.

[0039] As another possible implementation, the regular display area AA2 and the irregular display area AA1 may be arranged along the second direction. Figure 10 As shown, the first direction is the Y direction and the second direction is the X direction. As can be seen from the figure, in the plane formed by the X and Y directions, the irregular display area AA1 is located to the left of the regular display area AA2. When the regular display area AA2 and the irregular display area AA1 can be arranged along the second direction, the multiple first heating lines 11 and the multiple second heating lines 12 are arranged in a one-to-one correspondence, and the multiple second heating lines 12 are respectively connected in series with the corresponding first heating lines 11 between the first electrode lines V1 and the second electrode lines V2. This partitioning method can be used for the case where the display panel 10 includes a corner area 1001. Based on this partitioning method, the arrangement method of the first heating lines 11 in the corner area 1001 can be determined. The portions of the first electrode line V1 and the second electrode line V2 corresponding to the regular display area AA2 (for example, arranged in the regular display area AA2 or on both sides of the regular display area AA2) can extend along the first direction, and the portions corresponding to the irregular display area AA1 (for example, arranged in the irregular display area AA1 or on both sides of the irregular display area AA1) can be determined according to the shape of the irregular display area AA1, that is, the portions corresponding to the irregular display area AA1 can be arranged in parallel (not shown in the figure, refer to FIG. Figure 3-Figure 9 ), or it can be set non-parallel, refer to Figure 10 The lengths of the plurality of second heating wires 12 are generally the same, and the lengths of the plurality of first heating wires 11 are generally different.

[0040] Based on the shape characteristics of the special-shaped display area AA1, the length of the first heating line 11 can be greater than or less than the length of the second heating line 12. Alternatively, some portions of the first heating line 11 can be greater than or less than the length of the second heating line 12. Generally, the presence of the corner area 1001 reduces the length of the first heating line 11, while the presence of the groove area 1002 increases the length of the first heating line 11.

[0041] Based on the different arrangement directions of the aforementioned regular display area AA2 and the special-shaped display area AA1, the corner area 1001 and the groove area 1002 are described separately. It should be noted that the following embodiments are described with reference to a separate groove area 1002 or a separate corner area 1001. In actual operation, the display panel 10 may include both the groove area 1002 and the corner area 1001. For such a display panel 10, the arrangement of the first heating line 11 at the location of the groove area 1002 can be determined based on the method provided in Example 1, and the arrangement of the first heating line 11 at the location of the corner area 1001 can be determined based on the method provided in Example 2. The dividing line between the regular display area AA2 and the special-shaped display area AA1 is provided for ease of description and does not actually exist in the display panel 10.

[0042] Example 1

[0043] Regarding the display panel 10 having a groove area 1002, when the regular display area AA2 and the special-shaped display area AA1 are arranged along the first direction (taking the Y direction as an example), the groove area 1002 makes the length of the target heating line in the first heating line 11 greater than the length of the second heating line 12. At this time, the special-shaped display area AA1 is usually adjacent to other components provided on the display panel 10, so that the size of the special-shaped display area AA1 in the first direction is inconsistent. In this way, the multiple first heating lines 11 arranged along the first direction extend along the edge of the special-shaped display area AA1, and their lengths will be longer than the second heating lines 12. In addition, in order to balance the heating efficiency of the regular display area AA2 and the special-shaped display area AA1, the average line width of the target heating line can be made greater than the average line width of the multiple second heating lines 12. This reduces the resistance of the target heating line to a certain extent, improves its heating efficiency, and eliminates the mura caused by the large heat dissipation in the edge area. Reference Figure 3-Figure 9 , which is a schematic diagram of the arrangement of various heating lines of the display panel 10 in an embodiment of the present application.

[0044] The plurality of first heating lines 11 can be independently arranged in sequence and connected to the first electrode line V1 and the second electrode line V2, respectively. Of course, the plurality of first heating lines 11 can also have common segments in some areas. All or some of the first heating lines 11 can have common segments. The common segments are often located at locations of the irregular display area AA1 that are smaller along the first direction, thereby reducing the wiring area required in that area and adapting the actual wiring area to the shape of the irregular display area AA1.

[0045] The special-shaped display area AA1 is divided into a first area whose size along the first direction is larger than a preset size, and a second area whose size along the first direction is smaller than or equal to the preset size. That is, when viewed from the first direction, the first area is wider and the second area is narrower. Figure 3 and Figure 4 As shown, the first area is represented as AA11 within AA1, and the second area is represented as AA12 within AA1. The preset size can be determined based on actual conditions. Theoretically, the preset size can be any value smaller than the maximum size of the special-shaped display area AA1 along the first direction. In practice, the preset size can be set to a smaller value, typically not exceeding half of the maximum size of the special-shaped display area AA1 along the first direction.

[0046] In the scenario where multiple first heating lines 11 are arranged independently in sequence, refer to Figure 3 As shown, the spacing between two adjacent first heating lines 11 in the second area AA12 is smaller than the spacing between two adjacent first heating lines 11 in the first area AA11. This is because the second area AA12 has a smaller space, and the smaller spacing between the first heating lines 11 in the second area AA12 facilitates the rational layout of the first heating lines 11. Of course, in this case, the portion in the second area AA12 is closer to the regular display area AA2 than the portion in the first area AA11. Therefore, the first sub-segment 11b with a wider line width in the target heating line is located in the second area AA12, while the second sub-segment 11a with a narrower line width in the target heating line is located in the first area AA11.

[0047] In addition, in the scenario where multiple first heating lines 11 are arranged independently in sequence, since the first heating line 11 away from the regular display area AA2 is closer to the edge of the display panel 10, there is more heat dissipation at its location, and the first heating line 11 away from the regular display area AA2 often has a longer length. Therefore, the line width of the first sub-segment in the first heating line 11 close to the regular display area AA2 among the multiple first heating lines 11 can be set to be smaller than the line width of the first sub-segment in the first heating line 11 away from the regular display area AA2, which is beneficial to increasing the temperature of the locations of different first heating lines 11, as well as the temperature uniformity of the special-shaped display area AA1 and the regular display area AA2.

[0048] In the scenario where the plurality of first heating lines 11 have common line segments in some areas, refer to Figure 4 As shown, at least two of the multiple first heating lines 11 share a common line segment 11c in the second area AA12, that is, the partial line segments of at least two of the multiple first heating lines 11 in the second area AA12 can be merged together to reduce the frame occupation of the heating lines, and the aforementioned target heating line includes a common line segment 11c, that is, a target heating line including a first sub-line segment and a second sub-line segment of different line widths, which is at least one of the at least two first heating lines 11 having a common line segment 11c. In addition, the target heating line has a partial line segment 11d in the first area AA11 that is not perpendicular to the first direction.

[0049] refer to Figure 4 As shown, the voltages of the nodes of the first electrode line V1 are recorded as VGH, and the voltages of the nodes of the second electrode line V2 are recorded as VGL. For the convenience of explanation, the length of one pixel is taken as the unit length. Each pixel can include multiple pixel elements p, and the length of each pixel is the side length of the plane occupied by the multiple pixel elements p. It is assumed that the length and width of the plane occupied by the pixel obtained by combining multiple pixel elements p are equal. The pixels are arranged in an array in the display area AA, and the pixel elements p are arranged in an array in the display area AA. For example, each pixel can include three pixel elements, and the plane occupied by the three pixel elements is a rectangle, that is, in the X direction, the length of the area where the three pixel elements are located is one pixel length, and in the Y direction, the length of the area where one pixel element is located is one pixel length.

[0050] In the following, a display panel including 12 pixel elements p in the X direction is used as an example, i.e., including four pixels. The resistance per unit length of the common line segment 11c is set to R2, the resistance per unit length of the partial line segment 11d is set to R1, and the resistance per unit length of the other line segments 11e of the first heating line 11 and the second heating line 12, excluding the common line segment 11c and the partial line segment 11d, is set to R. The heating line includes 6 loops ① to ⑥, and the black circles represent different node positions u11, u2, and u3 on the first heating line. 12, u13, u14, u21, u22, u23, u24, and u3. Each node divides its loop into multiple segments, with a, b, c, d, e, f, g, h, i, j, and k representing the current in each segment. The segments corresponding to a and f belong to loop 1, b and h belong to loop 2, c and h belong to loop 3, d and i belong to loop 4, and e is the common segment for loops 1, 2, 3, and 4. The segment corresponding to j belongs to loop 5, and the segment corresponding to k belongs to loop 6. Due to bilateral symmetry, the voltage at node U3 is calculated as (VGH - VGL) / 2. Based on the voltage consistency of the U12 node, we know that: a*(R+R1)=b*R. Based on the voltage consistency of the U13 node, we know that: b*R+(a+b)*R1=c*R. Based on the voltage consistency of the U14 node, we know that: c*R+(a+b+c)*R1=d*R. In addition, there are the equations U3=d*R+(a+b+c+d)*R2=(VGH-VGL) / 2, j=(VGH-VGL) / (4R)=k, and e=a+b+c+d. From this, we can determine that d*R+(a+b+c+d)*R2=(VGH-VGL) / 2=2R*j, so R2 / R=(2j-d) / (a+b+c+d).

[0051] from Figure 4 As can be seen from the above formula, due to the existence of R1, the currents of a, b, and c are smaller than d. If the difference between the heat generation in the areas where a, b, and c are located and d or j is to be small, R1 needs to be small enough. Therefore, the larger the line width in the area where R1 is located, the better, or the smaller the square resistance of the material, the better. And the current d should preferably be slightly larger than j, so that the current a at the far end can be close to j. According to R2 / R=(2j-d) / (a+b+c+d), when the difference between j and d is small, or even when d is greater than j, 2j-d needs to be less than or equal to d, and when the difference between a, b, c and d is small, a+b+c+d is approximately 4d, so R2 / R needs to be less than 1, and the smaller R2 is, the larger a+b+c+d is, and the more likely the current a is to be close to j, that is, R2 needs to be small enough. The above rules also apply to display panels with other numbers of pixels. Based on this, the following settings can be made for the first heating line 11.

[0052] In a specific implementation, if the first sub-line segment is closer to the regular display area AA2 than the second sub-line segment, the first sub-line segment with a larger line width may include the common line segment 11c, and the second sub-line segment with a smaller line width 11e may be located in the first area AA11. Figure 5 As shown, it is clear that the common line segment 11c in the first sub-segments is closer to the regular display area AA2 than the second sub-segments, and the increase in the line width of the common line segment 11c can reduce the resistance of the first heating line 11 to which it belongs, and increase the current of the first heating line 11 to which it belongs. At this time, for a unit length of the first heating line 11, the second sub-segment has a larger partial voltage per unit length than the first sub-segment, so the location of the second sub-segment has a greater heating efficiency. Of course, the line segments in the second area AA12 that are not common line segments 11c can also belong to the first sub-segments and are closer to the regular display area AA2 than the second sub-segments. For example, the line width of the common line segment 11c can be 10 times the line width of the second sub-segment.

[0053] In a specific implementation, the target heating line has a partial line segment in the first area AA11 that is not perpendicular to the first direction, and the first sub-line segment includes the partial line segment 11d, that is, the partial line segment 11d that is not perpendicular to the first direction is set to a larger line width. Figure 6 As shown, partial line segment 11d is further away from regular display area AA2 than the other sub-segments in the first sub-segment except for partial line segment 11d, resulting in a smaller partial pressure per unit length. Sub-segments 11e in the first sub-segment except for partial line segment 11d serve as second sub-segments, and have a larger partial pressure per unit length. Therefore, the location of the second sub-segment has a greater heating efficiency. For example, the line width of partial line segment 11d can be 500 times that of the other sub-segments 11e.

[0054] Among them, at least two of the multiple first heating lines 11 are connected to the common line segment 11c through the same partial line segment 11d, that is, the partial line segment 11d that is not perpendicular to the first direction can be shared by different first heating lines 11, saving the wiring area while reducing the resistance of the first heating line 11.

[0055] Of course, the first sub-segment may include both the common segment 11c and the partial segment 11d which is not perpendicular to the first direction. Figure 7 As shown, the resistance of the target heating wire is further reduced, and its current is further increased, thereby improving its heating efficiency.

[0056] In the direction from the irregular display area AA1 to the regular display area AA2, the width of the line segment 11d can be gradually reduced, so that the first heating line 11 away from the regular display area AA2 has a smaller resistance. Figure 8Alternatively, in the direction from the irregular display area AA1 to the regular display area AA2, the width of the line segment 11d can be gradually increased, so that the portion shared by more first heating lines 11 has a larger line width, thereby having a smaller resistance per unit length, which is beneficial to increasing the current of each first heating line 11.

[0057] The partial line segment 11d may extend along the first direction or be arranged along the edge of the special-shaped display area AA1. The common line segment 11c may be arranged along the edge of the special-shaped display area AA1 or extend in a direction perpendicular to the first direction. The edge of the special-shaped display area AA1 is generally arranged according to the shape of the adjacent non-display area and may be a broken line or a curved line. Figure 3-Figure 8 As shown, the partial line segment 11d extends along the first direction, the common line segment 11c extends along the second direction perpendicular to the first direction, and the edge of the special-shaped display area AA1 is a broken line. Therefore, it can be said that the partial line segment 11d and the common line segment 11c are arranged along the edge of the special-shaped display area AA1; Figure 9 As shown, the partial line segment 11d is set along the edge of the special-shaped display area AA1 and presents an arc shape, and the common line segment 11c is set along the edge of the special-shaped display area AA1 and presents an arc shape. The edge of the special-shaped display area AA1 is an arc shape.

[0058] In the embodiment of the present application, the line width of the first sub-segment can be set to be greater than the line width of the plurality of second heating lines 12, and the line width of the second sub-segment can be equal to the line width of the plurality of second heating lines 12, so that the average line width of the target heating line is greater than the line width of the plurality of second heating lines 12. The line width of each second heating line 12 in the plurality of second heating lines 12 can be uniform, and the line widths of different second heating lines 12 can be the same.

[0059] In the embodiment of the present application, the irregular display area AA1 may include a pixel area having a pixel array and a non-pixel area not having a pixel array. The pixel array includes pixel elements p arranged in an array. The first sub-segment is located in the non-pixel area, and at least a portion of the second sub-segment is located in the pixel area. This ensures that the second sub-segment, which has the same width as the second heating line 12, has roughly the same impact on the display effect as the second heating line 12, thereby improving the display uniformity of the display panel 10.

[0060] In an embodiment of the present application, the first electrode line V1 and the second electrode line V2 can both extend along the first direction, and the first heating line 11 and the second heating line 12 are both located between the first electrode line V1 and the second electrode line V2, so that the first heating line 11 and the second heating line 12 can be respectively connected to different positions of the first electrode line V1 and different positions of the second electrode line V2.

[0061] The first heating line 11 can be connected to the first electrode line V1 or the second electrode line V2 via a connection line in the non-display area, and the second heating line 12 can be connected to the first electrode line V1 or the second electrode line V2 via a connection line in the non-display area. The first heating line 11 and the second heating line 12 can be arranged between the pixel elements P to avoid excessive impact on the display effect.

[0062] Example 2

[0063] The display panel 10 has a corner area 1001. When the regular display area AA2 and the irregular display area AA1 are arranged along the second direction, the corner area 1001 makes the lengths of the target heating lines in the first heating lines 11 inconsistent. Figure 10 , which is a schematic diagram of the structure of the display panel in an embodiment of the present application. In this case, a plurality of first heating lines 11 and a plurality of second heating lines 12 are provided in one-to-one correspondence, and a plurality of second heating lines 12 are connected in series with the corresponding first heating lines 11 between the first electrode line V1 and the second electrode line V2.

[0064] At least one of the first electrode line V1 and the second electrode line V2 includes a sub-electrode line V1-1 arranged along the edge of the special-shaped display area AA1. Figure 10 The portion of V1 that does not extend along the first direction (Y direction) is included in the sub-electrode line V1-1, and the sum of the lengths of the sub-electrode line V1-1 used to connect the plurality of first heating lines 11, the target heating line, and the second heating line 12 corresponding to the target heating line is less than or equal to the sum of the maximum size of the special-shaped display area AA1 along the second direction and the size of the regular display area AA2 along the second direction (i.e. Figure 10 The maximum dimension of the middle display area AA in the second direction (X direction) is shown in FIG. 2 , and the average line width of the target heating line is smaller than the average line width of the plurality of second heating lines 12. That is, the length of the target heating line is the shorter heating line among the first heating lines 11. The shorter first heating line is set with a smaller line width, which can make the target heating line have a larger partial pressure, improve the heating efficiency of the target heating line, and help overcome the situation where the edge area dissipates heat faster.

[0065] The width of the target heating line can increase in the direction (i.e., the second direction) from the irregular display area AA1 to the regular display area AA2, forming a gradual trend. In this case, the first sub-segment 11b and the second sub-segment 11a are non-overlapping segments, and the first sub-segment 11b is closer to the regular display area AA2 than the second sub-segment 11a. The width of the target heating line can also vary at a certain position, so that the target heating line includes multiple sub-segments of different widths, one of which serves as the first sub-segment 11b and another serves as the second sub-segment 11a, and the first sub-segment 11b is closer to the regular display area AA2 than the second sub-segment 11a.

[0066] In the embodiment of the present application, a connecting line 13 is provided between the target heating line and the sub-electrode line. The connecting line 13 can be provided in the non-display area NA or in the special-shaped display area AA1. The average line width of the connecting line 13 is greater than or equal to the average line width of the target heating line. Figure 10 As shown, the location of the connecting line 13 does not have a large partial voltage, which helps to increase the overall current of the target heating line and avoids reducing the heating efficiency of the first sub-segment 11b in the target heating line. Of course, if the connecting line 13 is close to the special-shaped display area AA1 or belongs to the special-shaped display area AA1, the average line width of the connecting line 13 can also be smaller than the average line width of the target heating line, so that the connecting line 13 has a higher resistance and higher heating efficiency, which can play a role in assisting the edge heating of the special-shaped display area AA1 and facilitating the temperature balancing at various locations on the display panel.

[0067] In the embodiment of the present application, the line width of the first sub-segment is equal to the line width of the multiple second heating lines 12, and the line width of the second sub-segment is smaller than the line width of the multiple second heating lines 12. In this way, the area where the first sub-segment is located and the area where the second heating lines 12 are located have similar display effects, avoiding excessive influence of the heating electrode layer on the display effect.

[0068] An embodiment of the present application provides a display panel, which includes a regular display area and an irregular display area. The display panel also includes a first substrate and a second substrate arranged opposite to each other, a liquid crystal layer located between the first substrate and the second substrate, and a heating electrode layer stacked with the liquid crystal layer. The heating electrode layer can heat the liquid crystal layer. The heating electrode layer includes a plurality of first heating lines in the irregular display area. The plurality of first heating lines are respectively connected between the first electrode lines and the second electrode lines. The first electrode lines and the second electrode lines are used to be applied with different voltages so that the heating electrode layer generates heat when energized. At least one of the plurality of first heating lines serves as a target heating line. The target heating line has a first sub-segment and a second sub-segment. The unit length of the first sub-segment is The resistance is smaller than the resistance per unit length of the second sub-line width, and the first sub-line segment is closer to the regular display area than the second sub-line segment. That is to say, for the first heating line in the special-shaped display area, the same first heating line may have a non-uniform resistance per unit length. The first sub-line segment close to the regular display area has a smaller resistance per unit length, while the second sub-line segment away from the regular display area has a larger resistance per unit length. In this way, when the same current is applied at different positions of the same heating line, the second sub-line segment away from the regular display area has a larger heating power than the first sub-line segment close to the regular display area. When the position away from the regular display area has a larger heat dissipation, the heating uniformity at different positions of the special-shaped display area is improved.

[0069] refer to Figure 11FIG2 is a schematic diagram of the structure of a display device provided in an embodiment of the present application, wherein the display device 1000 includes the aforementioned display panel 10. The display device 1000 includes, but is not limited to, a mobile phone, a personal digital assistant (PDA), a tablet computer, an e-book, a television, an access control system, a smart landline phone, a console, and other devices with display functions.

[0070] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from the other embodiments. In particular, the device embodiment is described briefly because it is generally similar to the display panel embodiment. For relevant parts, refer to the description of the display panel embodiment.

[0071] The above is only a preferred embodiment of the present application. Although the present application has been disclosed as a preferred embodiment, it is not intended to limit the present application. Any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present application without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of protection of the technical solution of the present application.

Claims

1. A display panel, characterized in that: The display panel includes a regular display area and a special-shaped display area, and further includes: a first substrate and a second substrate arranged opposite to each other; a liquid crystal layer located between the first substrate and the second substrate; a heating electrode layer stacked with the liquid crystal layer, the heating electrode layer comprising a plurality of first heating lines in the special-shaped display area, the plurality of first heating lines being respectively connected between first electrode lines and second electrode lines, the first electrode lines and the second electrode lines being configured to be applied with different voltages; At least one of the plurality of first heating lines serves as a target heating line, the target heating line having a first sub-segment and a second sub-segment, the resistance per unit length of the first sub-segment being smaller than the resistance per unit length of the second sub-segment, the first sub-segment being closer to the regular display area than the second sub-segment, and the line width of the first sub-segment being larger than the line width of the second sub-segment; The regular display area and the irregular display area are arranged along a first direction, the regular display area is rectangular in shape, the heating electrode layer includes a plurality of second heating lines in the regular display area, and the plurality of second heating lines are respectively connected between the first electrode lines and the second electrode lines; the plurality of first heating lines are arranged along the first direction, and the plurality of second heating lines are arranged along the first direction; the first heating lines extend along the edge of the irregular display area, so that the length of the target heating line is greater than the length of the plurality of second heating lines, and the average line width of the target heating line is greater than the average line width of the plurality of second heating lines; or, The regular display area and the special-shaped display area are arranged along the second direction, the shape of the regular display area is rectangular, the heating electrode layer includes a plurality of second heating lines in the regular display area, the plurality of second heating lines and the plurality of first heating lines are arranged in one-to-one correspondence, the plurality of second heating lines are respectively connected in series with the corresponding first heating lines between the first electrode line and the second electrode line, the plurality of first heating lines are arranged along the first direction perpendicular to the second direction, and the plurality of second heating lines are arranged along the first direction; at least one of the first electrode line and the second electrode line includes a sub-electrode line arranged along the edge of the special-shaped display area, the sub-electrode line is used to connect the plurality of first heating lines, the sum of the lengths of the target heating line and the second heating line corresponding to the target heating line is less than or equal to the sum of the maximum dimension of the special-shaped display area along the second direction and the dimension of the regular display area along the second direction, and the average line width of the target heating line is less than the average line width of the plurality of second heating lines.

2. The display panel according to claim 1, wherein: If the regular display area and the irregular display area are arranged along a first direction, the irregular display area includes a first area whose size along the first direction is greater than a preset size, and a second area whose size along the first direction is less than or equal to a preset size, at least two of the multiple first heating lines share a common line segment in the second area, and the target heating line includes the common line segment.

3. The display panel according to claim 2, wherein: The first sub-line segment includes the common line segment, and the second sub-line segment is located in the first area.

4. The display panel according to claim 2, wherein: The target heating line has a partial line segment in the first area that is not perpendicular to the first direction, and the first sub-line segment includes the partial line segment.

5. The display panel according to claim 4, wherein: At least two of the plurality of first heating lines are connected to the common line segment through the same partial line segment.

6. The display panel according to claim 4, wherein: In the direction from the irregular display area to the regular display area, the width of the partial line segments gradually decreases.

7. The display panel according to claim 4, wherein: The partial line segments extend along the first direction or are arranged along the edge of the special-shaped display area, and the common line segments are arranged along the edge of the special-shaped display area or extend along a direction perpendicular to the first direction.

8. The display panel according to claim 1, wherein: If the regular display area and the irregular display area are arranged along a first direction, the irregular display area includes a first area whose size along the first direction is greater than a preset size, and a second area whose size along the first direction is less than or equal to a preset size, the spacing between two adjacent ones of the multiple first heating lines in the second area is smaller than the spacing between two adjacent ones of the multiple first heating lines in the first area, the first sub-line segment is located in the second area, and the second sub-line segment is located in the first area.

9. The display panel according to claim 8, wherein: Among the plurality of first heating lines, a line width of a first sub-segment in a first heating line close to the regular display area is smaller than a line width of a first sub-segment in a first heating line far from the regular display area.

10. The display panel according to any one of claims 1 to 9, characterized in that: If the regular display area and the irregular display area are arranged along the first direction, the line width of the first sub-segment is greater than the line width of the multiple second heating lines, and the line width of the second sub-segment is equal to the line width of the multiple second heating lines.

11. The display panel according to claim 10, wherein: The special-shaped display area includes a pixel area with a pixel array and a non-pixel area without a pixel array. The first sub-line segment is located in the non-pixel area, and at least part of the second sub-line segment is located in the pixel area.

12. The display panel according to any one of claims 1 to 9, wherein: If the regular display area and the irregular display area are arranged along a first direction, both the first electrode lines and the second electrode lines extend along the first direction.

13. The display panel according to claim 1, wherein If the regular display area and the irregular display area are arranged along the second direction, a connecting line is provided between the target heating line and the sub-electrode line, and an average line width of the connecting line is greater than or equal to an average line width of the target heating line.

14. The display panel according to claim 1 or 13, wherein: If the regular display area and the irregular display area are arranged along the second direction, the line width of the first sub-segment is equal to the line width of the multiple second heating lines, and the line width of the second sub-segment is smaller than the line width of the multiple second heating lines.

15. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 14.

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