Touch display panel and touch display device

Abstract

The present application discloses a touch display panel and a touch display device, including a first display area and a second display area, the touch display panel also includes: a display substrate, including a pixel circuit layer and a light-emitting layer, the light-emitting layer includes a plurality of first light-emitting elements arranged in the first display area and a plurality of second light-emitting elements arranged in the second display area, and the light-emitting surface of at least some of the first light-emitting elements among the plurality of first light-emitting elements is a convex surface protruding away from the pixel circuit layer; a touch layer, arranged on one side of the light-emitting layer of the display substrate, the touch layer includes a patterned touch electrode, and the touch electrode extends in the first display area; wherein the height difference H1 between the middle and the edge of the first light-emitting element and the height difference H2 between the middle and the edge of the second light-emitting element satisfy H1>H2. In the present application, the brightness difference between the first display area and the second display area can be reduced at a wide viewing angle, and the display effect of the touch display panel can be improved.

Description

Technical Field

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

[0002] With the continuous development of intelligent display devices, it has become a development trend to set a camera under the display panel of the display device. In a touch display device, the area where the camera is set is usually not provided with a touch metal layer, and the touch metal layer is set in the ordinary display area. In the area where the touch metal layer is set, due to the occlusion of the touch metal layer, the brightness of the ordinary display area will be lower than that of the area where the camera is set at a larger viewing angle, affecting the display effect of the touch display device. Summary of the invention

[0003] The embodiments of the present application provide a touch display panel and a touch display device, which can make the overall brightness of the touch display panel substantially the same at a larger viewing angle, thereby improving the display effect.

[0004] In a first aspect, an embodiment of the present application provides a touch display panel, comprising a first display area and a second display area, the touch display panel also comprising: a display substrate, comprising a pixel circuit layer and a light-emitting layer, the light-emitting layer comprising a plurality of first light-emitting elements arranged in the first display area and a plurality of second light-emitting elements arranged in the second display area, the light emitting surface of at least some of the plurality of first light-emitting elements being a convex surface protruding away from the pixel circuit layer; a touch layer, arranged on one side of the light-emitting layer of the display substrate, the touch layer comprising a patterned touch electrode, the touch electrode extending in the first display area; wherein a height difference H1 between the middle and the edge of the first light-emitting element, and a height difference H2 between the middle and the edge of the second light-emitting element, satisfy H1>H2.

[0005] In a second aspect, an embodiment of the present application further provides a touch display device, comprising the touch display panel of an embodiment of the first aspect of the application.

[0006] The touch display panel and touch display device provided in the embodiments of the present application are provided with a first light-emitting element and a second light-emitting element of the same light-emitting color, so that the height difference H1 between the middle and the edge of the first light-emitting element is greater than the height difference H2 between the middle and the edge of the second light-emitting element. Compared with the second light-emitting element located in the second display area, the first light-emitting element located in the first display area is protruding in the middle, and the light emitted by the first light-emitting element is more divergent. After being shielded by the touch layer, the divergence degree of the light emitted by the first light-emitting element is close to the divergence degree of the light emitted by the second light-emitting element, so that at a larger viewing angle, the overall brightness of the touch display panel can be made basically the same, thereby improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 A schematic diagram of the structure of a touch display panel according to an embodiment of the present application;

[0009] Figure 2 for Figure 1 A cross-sectional view of the AA section of the touch display panel of an embodiment of the present application;

[0010] Figure 3 for Figure 2 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application;

[0011] Figure 4 for Figure 2 A partial enlarged view of the second light emitting element of the touch display panel of the embodiment of the present application;

[0012] Figure 5 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application;

[0013] Figure 6 for Figure 5 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application;

[0014] Figure 7 for Figure 5 A partial enlarged view of the second light emitting element of the touch display panel of the embodiment of the present application;

[0015] Figure 8 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application;

[0016] Fig. 9 for Figure 8 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application;

[0017] Fig.10 for Figure 8 A partial enlarged view of the second light emitting element of the touch display panel of the embodiment of the present application;

[0018] Fig.11 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application;

[0019] Fig.12 for Fig.11 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application;

[0020] Fig.13 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application;

[0021] Fig.14 for Fig.13 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application;

[0022] Fig.15 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application;

[0023] Fig.16 for Fig.15 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application;

[0024] Fig.17 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application;

[0025] Fig.18 A structural schematic diagram of a touch display device according to an embodiment of the present application.

[0026] Reference numerals:

[0027] 100. Touch display panel;

[0028] 110. substrate;

[0029] 120, pixel circuit layer; 121, thin film transistor;

[0030] 130, planarization layer; 131, first protrusion; 132, second protrusion; 133, third protrusion;

[0031] 140, light-emitting layer; 141, anode; 142, organic light-emitting layer; 143, cathode; 144, pixel definition layer; 145, pixel definition opening; 146, light-emitting element; 146A, first light-emitting element; 146B, second light-emitting element; 146C, third light-emitting element; 146D, fourth light-emitting element; 146E, fifth light-emitting element; 146F, sixth light-emitting element;

[0032] 150, touch layer; 151, touch electrode;

[0033] 200. Display device;

[0034] AA1, first display area; AA2, second display area. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the application. However, it is obvious to those skilled in the art that the application can be implemented when some details in these specific details are not needed. The following description of the embodiments is only to provide a better understanding of the application by illustrating the example of the application.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0037] Relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article, or device. In the absence of further restrictions, the elements defined by the statement "comprising ..." do not exclude the presence of additional identical elements in the process, method, article, or device that includes the elements.

[0038] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0039] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] It should be understood that in the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0041] The applicant found that when the touch display panel adopts an embedded touch layer, the touch electrode in the touch display panel is opaque, which will block the light emitted by the light-emitting element of the touch display panel, so that the divergence of the light emitted by the light-emitting element is reduced, thereby reducing the brightness of the touch display panel at a large viewing angle. When a camera under panel (CUP) is set in the touch display device, in order to allow sufficient external light to pass through the touch display panel and be used for camera imaging, touch electrodes are usually not set in the CUP area to avoid the touch electrode from blocking the light and increase the amount of light entering. Since there is no shielding of the touch electrode, the divergence length of the light emitted by the light-emitting element in the CUP area is higher. Therefore, at a large viewing angle, the brightness of the CUP area will be higher than that of other areas of the touch display panel, thereby affecting the display effect of the touch display device.

[0042] In view of the above analysis, the applicant proposed a touch display panel and a touch display device, wherein the touch display panel includes a first light-emitting element located in a first display area and a second light-emitting element located in a second display area, the first light-emitting element and the second light-emitting element have the same light-emitting color, and the touch electrode of the touch layer is arranged in the first display area. The height difference H1 between the middle and the edge of the first light-emitting element is greater than the height difference H2 between the middle and the edge of the second light-emitting element. Compared with the second light-emitting element, the middle of the first light-emitting element protrudes relative to the edge, the light divergence degree of the first light-emitting element is greater than the light divergence degree of the second light-emitting element, and the light emitted by the first light-emitting element is blocked by the touch electrode, and the light divergence degree is close to the light divergence degree of the second light-emitting element. Therefore, at a wide viewing angle, the brightness difference between the first display area and the second display area of ​​the touch display panel can be reduced, and the display effect of the touch display panel is improved.

[0043] Figure 1 A schematic diagram of the structure of a touch display panel according to an embodiment of the present application; Figure 2 for Figure 1 A cross-sectional view of the AA section of the touch display panel of an embodiment of the present application; Figure 3 for Figure 2 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application; Figure 4 for Figure 2 A partial enlarged view of the second light emitting element of the touch display panel of the embodiment of the present application;

[0044] For details, please refer to Figures 1 to 4, the embodiment of the present application provides a touch display panel 100, including a first display area AA1 and a second display area AA2, and the touch display panel 100 also includes: a display substrate and a touch layer 150. The display substrate includes a pixel circuit layer 120 and a light emitting layer 140, the light emitting layer 140 includes a plurality of first light emitting elements 146A arranged in the first display area AA1 and a plurality of second light emitting elements 146B arranged in the second display area AA2, and the light emitting surface of at least part of the plurality of first light emitting elements 146A is a convex surface protruding away from the pixel circuit layer 120; the touch layer 150 is arranged on one side of the light emitting layer 140 of the display substrate, and the touch layer 150 includes a patterned touch electrode 151, and the touch electrode 151 extends in the first display area AA1. Among them, the height difference H1 between the middle and the edge of the first light emitting element 146A, and the height difference H2 between the middle and the edge of the second light emitting element 146B, satisfy H1>H2.

[0045] See also Figure 1 The touch display panel 100 of the embodiment of the present application includes a first display area AA1 and a second display area AA2. The first display area AA1 is a normal display area of ​​the touch display panel 100, and the second display area AA2 is a CUP area with an under-screen camera. For example, the touch display panel 100 of the embodiment of the present application may be an organic light-emitting diode (OLED) display panel.

[0046] See also Figure 2 The display substrate is used to realize the display function of the touch display panel 100 of the embodiment of the present application. The display substrate includes a substrate 110, and the substrate 110 can be formed of a polymer material such as glass, polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyarylate (PAR) or glass fiber reinforced plastic (FRP).

[0047] See also Figure 2 The display substrate further includes a pixel circuit layer 120, which is located on the substrate 110. The pixel circuit layer 120 includes a plurality of thin film transistors 121 (TFT) and a pixel circuit formed by the thin film transistors 121, which is used to control the light emitting element 146 to emit light.

[0048] See also Figure 2The display substrate further includes a light emitting layer 140, which is located on the side of the pixel circuit layer 120 away from the substrate 110. The light emitting layer 140 includes a plurality of light emitting elements 146 and a pixel definition layer 144. The pixel definition layer 144 includes a plurality of pixel definition openings 145. The light emitting elements 146 are at least partially disposed in the pixel definition openings 145, and the plurality of light emitting elements 146 can emit light of different colors, each light emitting element 146 and the pixel circuit together constitute a sub-pixel, and the plurality of sub-pixels form a pixel unit, and the plurality of pixel units display a picture.

[0049] Please continue reading Figure 2 The display substrate further includes an encapsulation layer, which is located on a side of the light emitting layer 140 away from the pixel circuit layer 120 .

[0050] See also Figure 2 , the touch layer 150 is located on the side of the light-emitting layer 140 of the display substrate, that is, the touch layer 150 is located on the side of the encapsulation layer away from the light-emitting layer 140, and the light emitted by the light-emitting layer 140 is emitted from the touch display panel 100 via the encapsulation layer and the touch layer 150. The touch layer 150 includes a patterned touch electrode 151, and the touch electrode 151 extends to the first display area AA1. The second display area AA2 is a CUP area with an under-screen camera, so the touch electrode 151 is not arranged in the second display area AA2 to avoid the touch electrode 151 blocking the light used for imaging by the under-screen camera. The touch electrode 151 located in the first display area AA1 can be arranged on the side of the area between the pixel definition openings 145 of the pixel definition layer 144 away from the light-emitting layer 140 to avoid the touch electrode 151 blocking the light emitted by the light-emitting element 146.

[0051] See also Figures 2 to 4, the light emitting element 146 of the display substrate includes a plurality of first light emitting elements 146A and a plurality of second light emitting elements 146B, the first light emitting element 146A is located in the first display area AA1, and the second light emitting element 146B is located in the second display area AA2. The light emitting surface of at least some of the first light emitting elements 146A among the plurality of first light emitting elements 146A is a convex surface that convexes in the direction away from the pixel circuit layer 120. Since the light emitting surface of the first light emitting element 146A is convex, the light emitted by the first light emitting element 146A will be scattered. There is a height difference H1 between the middle and the edge of the first light emitting element 146A with a convex light emitting surface. For example, when the light emitting surface of the first light emitting element 146A is a spherical crown surface, the height difference H1 between the middle and the edge of the first light emitting element 146A is the height of the spherical crown; when the light emitting surface of the first light emitting element 146A is a conical surface, the height difference H1 between the middle and the edge of the first light emitting element 146A is the height of the cone. Since the height difference H1 between the middle and the edge of the first light emitting element 146A is greater than the height difference H2 between the middle and the edge of the second light emitting element 146B, the divergence angle of the light emitted by the first light emitting element 146A is greater than the divergence angle of the light emitted by the second light emitting element 146B. The first light emitting element 146A is located in the first display area AA1, and the touch electrode 151 located in the first display area AA1 will block the light emitted by the first light emitting element 146A, so that the divergence angle of the actual light emitted by the first light emitting element 146A is reduced. Therefore, even if the touch electrode 151 blocks the light emitted by the first light emitting element 146A, the divergence angle of the actual light emitted by the first light emitting element 146A can be close to the divergence angle of the actual light emitted by the second light emitting element 146B, so that when the touch display panel 100 is observed at a larger viewing angle, the brightness difference between the first display area AA1 and the second display area AA2 is reduced, and the display effect of the touch display panel 100 at a larger viewing angle is improved.

[0052] It should be noted that the first light-emitting element 146A and the second light-emitting element 146B are light-emitting elements 146 that emit light of the same color, and therefore, the sizes of the orthographic projections of the first light-emitting element 146A and the second light-emitting element 146B on the plane where the touch display panel 100 is located can be equal. In addition, relative to the plane where the touch display panel 100 is located, the light emitting surface of the second light-emitting element 146B can be convex or parallel. When the light emitting surface of the second light-emitting element 146B is also convex, the first light-emitting element 146A is more convex than the second light-emitting element 146B. When the light emitting surface of the second light-emitting element 146B is parallel to the plane where the touch display panel 100 is located, the first light-emitting element 146A only needs to be convex.

[0053] It should also be noted that the light-emitting element 146 includes an anode 141, an organic light-emitting layer 142 and a cathode 143. The anode 141, the organic light-emitting layer 142 and the cathode 143 are arranged in sequence in a direction away from the pixel circuit layer 120. The anode 141 includes an anode 141 pattern corresponding to a pixel unit one by one, and the anode 141 is connected to a source electrode or a drain electrode of a thin film transistor 121 of the pixel circuit layer 120. The first light-emitting element 146A protrudes in a direction away from the pixel circuit layer 120, and the anode 141, the organic light-emitting layer 142 and the cathode 143 of the first light-emitting element 146A protrude in a direction away from the pixel circuit layer 120, so that the light emitting surface of the first light-emitting element 146A protrudes in a direction away from the pixel circuit layer 120.

[0054] For further information, see Figures 2 to 4 The pixel circuit layer 120 includes a planarization layer 130, and the light-emitting layer 140 is arranged on the side of the planarization layer 130 facing away from the pixel circuit layer 120. The planarization layer 130 is provided with a plurality of first protrusions 131 and a plurality of second protrusions 132 facing the touch layer 150. The first light-emitting element 146A covers the first protrusion 131, and the second light-emitting element 146B covers the second protrusion 132.

[0055] The display panel 100 further includes a planarization layer 130 located on the pixel circuit layer 120. The planarization layer 130 may include an organic layer such as acrylic, polyimide (PI) or benzocyclobutene (BCB), and the planarization layer 130 has a planarization function. The anode 141 of the light emitting element 146 is located on the side of the planarization layer 130 away from the pixel circuit layer 120, and the anode 141 of the light emitting element 146 is electrically connected to the pixel circuit layer 120 through a via hole passing through the planarization layer 130.

[0056] The first protrusion 131 and the second protrusion 132 are provided on the planarization layer 130, and the first light-emitting element 146A covers the first protrusion 131, and the second light-emitting element 146B covers the second protrusion 132, so that the first light-emitting element 146A and the second light-emitting element 146B both form a convex structure. The first light-emitting element 146A and the second light-emitting element 146B can both emit divergent light. Since the height difference H1 corresponding to the first light-emitting element 146A is greater than the height difference H2 corresponding to the second light-emitting element 146B, the divergence angle of the light emitted by the first light-emitting element 146A is greater than the divergence angle of the light emitted by the second light-emitting element 146B. The light emitted by the first light-emitting element 146A is blocked by the touch electrode 151, and the divergence angle is reduced, approaching the divergence angle of the light emitted by the second light-emitting element 146B that is not blocked by the touch electrode 151, thereby reducing the difference between the actual light divergence angle of the first light-emitting element 146A and the actual light divergence angle of the second light-emitting element 146B, and then reducing the brightness difference between the first display area AA1 and the second display area AA2 at a larger viewing angle, thereby improving the display effect of the touch display panel 100.

[0057] For further information, see Figures 2 to 4 The first protrusion 131 and the second protrusion 132 are at least part of a cone, and the acute angle α1 formed by the side of the first protrusion 131 and the plane where the planarization layer 130 is located, and the acute angle α2 formed by the side of the second protrusion 132 and the plane where the planarization layer 130 is located, satisfying α1>α2.

[0058] The first protrusion 131 and the second protrusion 132 are at least a part of a cone. When the orthographic projection shape of the first protrusion 131 on the plane where the touch display panel 100 is located is a circle, the first protrusion 131 is a cone or a truncated cone. When the orthographic projection shape of the first protrusion 131 on the plane where the touch display panel 100 is located is a rectangle, the first protrusion 131 is a quadrangular pyramid or a quadrangular pyramid. The acute angle α1 formed by the side of the first protrusion 131 and the plane where the planarization layer 130 is located is greater than the acute angle α2 formed by the side of the second protrusion 132 and the plane where the planarization layer 130 is located, so that the convexity of the first protrusion 131 is greater than that of the second protrusion 132. The first light-emitting element 146A covers the first protrusion 131, and the second light-emitting element 146B covers the second protrusion 132. Therefore, when the convexity of the first protrusion 131 is greater than that of the second protrusion 132, the divergence angle of the light emitted by the first light-emitting element 146A is greater than the divergence angle of the light emitted by the second light-emitting element 146B. The touch electrode 151 blocks the light emitted by the first light-emitting element 146A, reducing the actual light divergence angle of the first light-emitting element 146A, making the actual light divergence angle of the first light-emitting element 146A closer to the actual light divergence angle of the second light-emitting element 146B, thereby reducing the brightness difference between the first display area AA1 and the second display area AA2 at a larger viewing angle, thereby improving the display effect of the touch display panel 100.

[0059] For further information, see Figures 2 to 4 The first protrusion 131 and the second protrusion 132 are at least part of a cone, and the acute angle α1 formed by the side of the first protrusion 131 and the plane where the planarization layer 130 is located, and the acute angle α2 formed by the side of the second protrusion 132 and the plane where the planarization layer 130 is located, satisfy θ1≤α1-α2≤θ2, wherein θ1 is the first limit angle difference, and θ2 is the second limit angle difference.

[0060] When the first protrusion 131 and the second protrusion 132 are at least a part of a cone, the acute angle α1 formed by the side surface of the first protrusion 131 and the plane where the planarization layer 130 is located is greater than the acute angle α2 formed by the side surface of the second protrusion 132 and the plane where the planarization layer 130 is located. α1-α2 is greater than or equal to the first limit angle difference θ1, which can make the convexity of the first protrusion 131 significantly greater than that of the second protrusion 132, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly smaller than the actual light divergence angle of the second light-emitting element 146B, so as to avoid the brightness of the first display area AA1 being still significantly lower than that of the second display area AA2 at a larger viewing angle. α1-α2 is less than or equal to the second limit angle difference θ2, which can prevent the first protrusion 131 from being too protruding relative to the second protrusion 132, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly greater than the actual light divergence angle of the second light-emitting element 146B, thereby preventing the brightness of the first display area AA1 from being significantly higher than that of the second display area AA2 at a larger viewing angle. Exemplarily, the first limit angle difference θ1=0.5°, and the second limit angle difference θ2=5°.

[0061] For further information, please refer to Figures 2 to 4 , at least one of the first protrusion 131 and the second protrusion 132 has a cross-sectional shape formed in the cross section of the display panel thickness direction as a trapezoid. When the cross-sectional shape of the first protrusion 131 and / or the second protrusion 132 is a trapezoid, taking the cross-sectional shape of the first protrusion 131 as an example, the first protrusion 131 is a table, such as a truncated table or a prism. At this time, the height difference H1 between the middle and the edge of the first light-emitting element 146A is the height of the trapezoid corresponding to the cross-sectional shape of the first protrusion 131. Among them, the first light-emitting element 146A corresponds to the position of the top of the first protrusion 131, and can emit light along the plane perpendicular to the touch display panel 100; the first light-emitting element 146A corresponds to the position of the side wall of the first protrusion 131, and can emit divergent light in the direction away from the planarization layer 130. Similarly, the cross-sectional shape of the second protrusion 132 can also be a trapezoid.

[0062] Figure 5 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application; Figure 6 for Figure 5 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application; Figure 7 for Figure 5 A partial enlarged view of the second light emitting element of the touch display panel of an embodiment of the present application.

[0063] Optionally, see Figures 5 to 7 , at least one of the first protrusion 131 and the second protrusion 132 has a cross-sectional shape formed in a cross section in the thickness direction of the display panel that is a triangle. When the cross-sectional shape of the first protrusion 131 and / or the second protrusion 132 is a triangle, taking the cross-sectional shape of the first protrusion 131 as an example, the first protrusion 131 is a cone, such as a cone or a pyramid. At this time, the height difference H1 between the middle and the edge of the first light-emitting element 146A is the height of the triangle of the cross-sectional shape corresponding to the first protrusion 131. Among them, the position of the first light-emitting element 146A corresponding to the side wall of the first protrusion 131 can emit divergent light in a direction away from the planarization layer 130. Similarly, the cross-sectional shape of the second protrusion 132 can also be a triangle.

[0064] Figure 8 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application; Fig. 9 for Figure 8 A partial enlarged view of the first light emitting element of the touch display panel of the embodiment of the present application; Fig.10 for Figure 8 A partial enlarged view of the second light emitting element of the touch display panel of an embodiment of the present application.

[0065] For further information, see Figures 8 to 10 The first protrusion 131 and the second protrusion 132 are both curved protrusions. The acute angle α3 formed by the tangent plane of the edge of the first protrusion 131 and the plane where the planarization layer 130 is located, and the acute angle α4 formed by the tangent plane of the edge of the second protrusion 132 and the plane where the planarization layer 130 is located, satisfy α3>α4.

[0066] The first protrusion 131 and the second protrusion 132 are both curved protrusions. When the orthographic projection shape of the first protrusion 131 on the plane where the touch display panel 100 is located is a circle, the first protrusion 131 may be a spherical crown. When the orthographic projection shape of the first protrusion 131 on the plane where the touch display panel 100 is located is a rectangle, the first protrusion 131 is a curved top cylinder. The acute angle α3 formed by the tangent plane at the edge of the curved surface of the first protrusion 131 and the plane where the planarization layer 130 is located is greater than the acute angle α4 formed by the tangent plane at the edge of the curved surface of the second protrusion 132 and the plane where the planarization layer 130 is located, so that the convexity of the first protrusion 131 is greater than that of the second protrusion 132. The first light-emitting element 146A covers the first protrusion 131, and the second light-emitting element 146B covers the second protrusion 132. Therefore, when the convexity of the first protrusion 131 is greater than that of the second protrusion 132, the divergence angle of the light emitted by the first light-emitting element 146A is greater than the divergence angle of the light emitted by the second light-emitting element 146B. The touch electrode 151 blocks the light emitted by the first light-emitting element 146A, reducing the actual light divergence angle of the first light-emitting element 146A, making the actual light divergence angle of the first light-emitting element 146A closer to the actual light divergence angle of the second light-emitting element 146B, thereby reducing the brightness difference between the first display area AA1 and the second display area AA2 at a larger viewing angle, thereby improving the display effect of the touch display panel 100.

[0067] For further information, please refer to Figures 8 to 10 The first protrusion 131 and the second protrusion 132 are both curved protrusions. The acute angle α3 formed by the tangent plane of the edge of the first protrusion 131 and the plane where the planarization layer 130 is located, and the acute angle α4 formed by the tangent plane of the edge of the second protrusion 132 and the plane where the planarization layer 130 is located, satisfy θ3≤α3-α4≤θ4, wherein θ3 is the third limit angle difference, and θ4 is the fourth limit angle difference.

[0068] When the first protrusion 131 and the second protrusion 132 are both curved protrusions, the acute angle α3 formed by the tangent plane of the curved surface of the first protrusion 131 at the edge and the plane where the planarization layer 130 is located is greater than the acute angle α4 formed by the tangent plane of the curved surface of the second protrusion 132 at the edge and the plane where the planarization layer 130 is located. α3-α4 is greater than or equal to the third limit angle difference θ2, which can make the convexity of the first protrusion 131 significantly greater than that of the second protrusion 132, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly smaller than the actual light divergence angle of the second light-emitting element 146B, so as to avoid the brightness of the first display area AA1 being still significantly lower than that of the second display area AA2 at a larger viewing angle. α3-α4 is less than or equal to the fourth limit angle difference θ4, which can prevent the first protrusion 131 from being too protruding relative to the second protrusion 132, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly greater than the actual light divergence angle of the second light-emitting element 146B, thereby preventing the brightness of the first display area AA1 from being significantly higher than that of the second display area AA2 at a larger viewing angle. Exemplarily, the third limit angle difference θ3 = 0.5°, and the fourth limit angle difference θ4 = 5°.

[0069] For further information, please refer to Figures 8 to 10 , at least one of the first protrusion 131 and the second protrusion 132 has a cross-sectional shape formed in a cross section in the thickness direction of the display panel that is an arcuate shape. When the cross-sectional shape of the first protrusion 131 and / or the second protrusion 132 is an arcuate shape, taking the case where the cross-sectional shape of the first protrusion 131 is an arcuate shape as an example, the first protrusion 131 may be a spherical crown. At this time, the height difference H1 between the middle and the edge of the first light-emitting element 146A is the height of the arcuate shape corresponding to the cross-sectional shape of the first protrusion 131. Among them, the position of the first light-emitting element 146A corresponding to the curved surface of the first protrusion 131 can emit divergent light in a direction away from the planarization layer 130. Similarly, the cross-sectional shape of the second protrusion 132 may also be an arcuate shape.

[0070] Fig.11 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application; Fig.12 for Fig.11 A partial enlarged view of the first light emitting element of the touch display panel of an embodiment of the present application.

[0071] Optionally, see Fig.11 and Fig.12, the pixel circuit layer 120 includes a planarization layer 130, and the planarization layer 130 includes a first part and a second part. The first part is arranged in the first display area AA1, including a plurality of third protrusions 133, and the second part is a planar structure. The first light-emitting element 146A covers the third protrusions 133, and the second light-emitting element 146B is a planar structure. At this time, the light emitting surface of the first light-emitting element 146A is convex, and the light emitting surface of the second light-emitting element 146B is not convex. The light emitted by the first light-emitting element 146A has a certain divergence angle. The light emitted by the first light-emitting element 146A is blocked by the touch electrode 151, so that the actual light divergence angle of the first light-emitting element 146A is reduced. Under the joint action of the convex light emitting surface and the shielding of the touch electrode 151, the difference between the actual light divergence angle of the first light-emitting element 146A and the divergence angle of the second light-emitting element 146B can be reduced, and the brightness difference between the first display area AA1 and the second display area AA2 is weakened at a large viewing angle.

[0072] Fig.13 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application; Fig.14 for Fig.13 A partial enlarged view of the first light emitting element of the touch display panel of an embodiment of the present application.

[0073] For further information, please refer to Fig.11 and Fig.12 , and combined with Fig.13 and Fig.14, the third protrusion 133 is at least a part of the cone, and the acute angle α5 formed by the side of the third protrusion 133 and the plane where the planarization layer 130 is located satisfies θ1≤α5≤θ2, wherein θ1 is the first limit angle difference, and θ2 is the second limit angle difference. When the third protrusion 133 is at least a part of the cone, the acute angle α5 formed by the side of the third protrusion 133 and the plane where the planarization layer 130 is located is greater than or equal to the first limit angle difference θ1, which can make the third protrusion 133 relatively obviously convex, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly smaller than the actual light divergence angle of the second light-emitting element 146B, thereby avoiding the brightness of the first display area AA1 being still significantly lower than that of the second display area AA2 at a larger viewing angle. α5 is less than or equal to the second limit angle difference θ2, which can prevent the third protrusion 133 from being too convex, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly greater than the actual light divergence angle of the second light-emitting element 146B, thereby preventing the brightness of the first display area AA1 from being significantly higher than that of the second display area AA2 at a larger viewing angle. Exemplarily, the first limit angle difference θ1=0.5°, and the second limit angle difference θ2=5°.

[0074] Fig.15 for Figure 1 Another cross-sectional view of the AA section of the touch display panel of the embodiment of the present application; Fig.16 for Fig.15 A partial enlarged view of the first light emitting element of the touch display panel of an embodiment of the present application.

[0075] For further information, see Fig.15 and Fig.16, the third protrusion 133 is a curved protrusion, and the acute angle α5 formed by the tangent plane of the edge of the third protrusion 133 and the plane where the planarization layer 130 is located satisfies θ3≤α5≤θ4, wherein θ3 is the third limit angle difference, and θ4 is the fourth limit angle difference. When the third protrusion 133 is a curved protrusion, the acute angle α5 formed by the tangent plane of the curved surface of the third protrusion 133 at the edge and the plane where the planarization layer 130 is located is greater than or equal to the third limit angle difference θ2, which can make the first protrusion 131 relatively obviously convex, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly smaller than the actual light divergence angle of the second light-emitting element 146B, thereby avoiding the brightness of the first display area AA1 being still significantly lower than that of the second display area AA2 at a larger viewing angle. α5 is less than or equal to the fourth limit angle difference θ4, which can prevent the first protrusion 131 from being too protruding relative to the second protrusion 132, so that after the touch electrode 151 blocks the light emitted by the first light-emitting element 146A, the actual light divergence angle of the first light-emitting element 146A will not be significantly greater than the actual light divergence angle of the second light-emitting element 146B, thereby preventing the brightness of the first display area AA1 from being significantly higher than that of the second display area AA2 at a larger viewing angle. Exemplarily, the third limit angle difference θ3 = 0.5°, and the fourth limit angle difference θ4 = 5°.

[0076] Fig.17 for Figure 1 Another cross-sectional view of the AA section of the touch display panel according to the embodiment of the present application.

[0077] For further information, see Fig.17 The light-emitting layer 140 also includes a plurality of third light-emitting elements 146C and a plurality of fourth light-emitting elements 146D having the same light-emitting color and the same area, the third light-emitting element 146C is located in the first display area AA1, the fourth light-emitting element 146D is located in the second display area AA2, and the touch layer 150 covers part of the light-emitting layer 140; the area of ​​the first light-emitting element 146A is smaller than the area of ​​the third light-emitting element 146C; wherein, along the thickness direction of the light-emitting layer 140, the height difference H3 between the middle and the edge of the third light-emitting element 146C, the height difference H4 between the middle and the edge of the fourth light-emitting element 146D, in the plane where the light-emitting layer 140 is located, the circumscribed circle radius R1 of the orthographic projection of the first light-emitting element 146A, and the circumscribed circle radius R2 of the orthographic projection of the third light-emitting element 146C satisfy (H1-H2) / R1>(H3-H4) / R2.

[0078] The light emitted by the first light-emitting element 146A and the second light-emitting element 146B has the same color and the same area, the light emitted by the third light-emitting element 146C and the fourth light-emitting element 146D has the same color and the same area, and the area of ​​the first light-emitting element 146A is smaller than that of the third light-emitting element 146C. At this time, the shielding effect of the touch electrode 151 on the light emitted by the first light-emitting element 146A is higher than the shielding effect of the touch electrode 151 on the light emitted by the third light-emitting element 146C. Therefore, when (H1-H2) / R1>(H3-H4) / R2, the divergence degree of the light emitted by the first light-emitting element 146A compared with the second light-emitting element 146B is greater than the divergence degree of the light emitted by the third light-emitting element 146C compared with the fourth light-emitting element 146D. After being blocked by the touch electrode 151, the actual light divergence angles of the first light-emitting element 146A, the second light-emitting element 146B, the third light-emitting element 146C and the fourth light-emitting element 146D are close, so that at a wide viewing angle, the brightness difference between different colors of the first display area AA1 and the second display surface is reduced, thereby improving the display effect of the touch display panel 100.

[0079] For further information, please refer to Fig.17 The light-emitting layer 140 also includes a plurality of fifth light-emitting elements 146E and a plurality of sixth light-emitting elements 146F having the same light-emitting color and the same area, the fifth light-emitting element 146E is located in the first display area AA1, the sixth light-emitting element 146F is located in the second display area AA2, and the touch layer 150 covers part of the light-emitting layer 140; the area of ​​the third light-emitting element 146C is larger than the area of ​​the fifth light-emitting element 146E; wherein, along the thickness direction of the light-emitting layer 140, the height difference H5 between the middle and the edge of the fifth light-emitting element 146E, the height difference H6 between the middle and the edge of the sixth light-emitting element 146F, and the radius R3 of the circumscribed circle of the orthographic projection of the fifth light-emitting element 146E in the plane where the light-emitting layer 140 is located, satisfy (H1-H2) / R1>(H3-H4) / R2>(H5-H6) / R3.

[0080] The light emitted by the fifth light emitting element 146E and the sixth light emitting element 146F has the same color and the same area, and the area of ​​the first light emitting element 146A is smaller than that of the third light emitting element 146C and smaller than that of the fifth light emitting element 146E. At this time, the shielding effect of the touch electrode 151 on the light emitted by the first light emitting element 146A is higher than the shielding effect of the touch electrode 151 on the light emitted by the third light emitting element 146C, and higher than the shielding effect of the touch electrode 151 on the light emitted by the fifth light emitting element 146E. Therefore, when (H1-H2) / R1>(H3-H4) / R2>(H5-H6) / R3, the divergence degree of the light emitted by the first light emitting element 146A compared with the second light emitting element 146B is greater than the divergence degree of the light emitted by the third light emitting element 146C compared with the fourth light emitting element 146D, and greater than the divergence degree of the light emitted by the fifth light emitting element 146E compared with the sixth light emitting element 146F. After being blocked by the touch electrode 151, the actual light divergence angles of the first light-emitting element 146A, the second light-emitting element 146B, the third light-emitting element 146C, the fourth light-emitting element 146D, the fifth light-emitting element 146E and the plurality of sixth light-emitting elements 146F are close, so that at a wide viewing angle, the brightness difference between different colors of the first display area AA1 and the second display surface is reduced, thereby improving the display effect of the touch display panel 100.

[0081] Fig.18 FIG. 1 is a schematic diagram of a touch display device according to an embodiment of the present application. Fig.18 The embodiment of the present application also provides a touch display device 200. The touch display device 200 includes the touch display panel 100 provided by any of the above embodiments. The touch display device 200 provided by the embodiment of the present application can be any product or component with a touch display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0082] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A touch display panel, comprising a first display area and a second display area, characterized in that: The touch display panel also includes: A display substrate, comprising a pixel circuit layer and a light-emitting layer, wherein the light-emitting layer comprises a plurality of first light-emitting elements arranged in the first display area and a plurality of second light-emitting elements arranged in the second display area, wherein light-emitting surfaces of at least some of the plurality of first light-emitting elements are convex surfaces protruding in a direction away from the pixel circuit layer; and light-emitting colors of the first light-emitting elements are the same as those of the second light-emitting elements; A touch layer, disposed on one side of the light-emitting layer of the display substrate, the touch layer comprising a patterned touch electrode, and the touch electrode extends in the first display area; The height difference H1 between the middle and the edge of the first light emitting element and the height difference H2 between the middle and the edge of the second light emitting element satisfy H1>H2.

2. The touch display panel according to claim 1, characterized in that: The pixel circuit layer includes a planarization layer, the light-emitting layer is arranged on a side of the planarization layer facing away from the pixel circuit layer, the planarization layer is provided with a plurality of first protrusions and a plurality of second protrusions facing the touch layer, the first light-emitting element covers the first protrusions, and the second light-emitting element covers the second protrusions.

3. The touch display panel according to claim 2, characterized in that: The first protrusion and the second protrusion are at least part of a cone, and an acute angle α1 formed by a side surface of the first protrusion and a plane where the planarization layer is located, and an acute angle α2 formed by a side surface of the second protrusion and a plane where the planarization layer is located, satisfying α1>α2.

4. The touch display panel according to claim 2, characterized in that: The first protrusion and the second protrusion are at least part of a cone, and the acute angle α1 formed by the side surface of the first protrusion and the plane where the planarization layer is located, and the acute angle α2 formed by the side surface of the second protrusion and the plane where the planarization layer is located, satisfy θ1≤α1-α2≤θ2, wherein θ1 is a first limit angle difference, and θ2 is a second limit angle difference.

5. The touch display panel according to claim 3 or 4, characterized in that: At least one of the first protrusion and the second protrusion has a trapezoidal cross-sectional shape formed in a cross section in a thickness direction of the display panel.

6. The touch display panel according to claim 3 or 4, characterized in that: At least one of the first protrusion and the second protrusion has a triangular cross-sectional shape formed in a cross section in a thickness direction of the display panel.

7. The touch display panel according to claim 2, characterized in that: The first protrusion and the second protrusion are both curved protrusions, and the acute angle α3 formed by the tangent plane of the edge of the first protrusion and the plane where the planarization layer is located, and the acute angle α4 formed by the tangent plane of the edge of the second protrusion and the plane where the planarization layer is located, satisfying α3>α4.

8. The touch display panel according to claim 2, characterized in that: Both the first protrusion and the second protrusion are curved protrusions, and the acute angle α3 formed by the tangent plane of the edge of the first protrusion and the plane where the planarization layer is located, and the acute angle α4 formed by the tangent plane of the edge of the second protrusion and the plane where the planarization layer is located, satisfy θ3≤α3-α4≤θ4, wherein θ3 is the third limit angle difference, and θ4 is the fourth limit angle difference.

9. The touch display panel according to claim 7 or 8, characterized in that: At least one of the first protrusion and the second protrusion has an arcuate cross-sectional shape formed in a cross section in a thickness direction of the display panel.

10. The touch display panel according to claim 1, characterized in that: The pixel circuit layer includes a planarization layer, which includes a first part and a second part. The first part is arranged in the first display area and includes a plurality of third protrusions. The second part is a planar structure. The first light-emitting element covers the third protrusions, and the second light-emitting element is a planar structure.

11. The touch display panel according to claim 10, characterized in that: The third protrusion is at least a part of a cone, and the acute angle α5 formed by the side surface of the third protrusion and the plane where the planarization layer is located satisfies θ1≤α5≤θ2, wherein θ1 is a first limit angle difference, and θ2 is a second limit angle difference.

12. The touch display panel according to claim 10, characterized in that: The third protrusion is a curved protrusion, and the acute angle α5 formed by the tangent plane of the edge of the third protrusion and the plane where the planarization layer is located satisfies θ3≤α5≤θ4, wherein θ3 is the third limit angle difference, and θ4 is the fourth limit angle difference.

13. The touch display panel according to claim 1, characterized in that: The light-emitting layer further includes a plurality of third light-emitting elements and a plurality of fourth light-emitting elements of the same light-emitting color and the same area, the third light-emitting elements are located in the first display area, the fourth light-emitting elements are located in the second display area, and the touch layer covers part of the light-emitting layer; the area of ​​the first light-emitting element is smaller than that of the third light-emitting element; Among them, along the thickness direction of the light-emitting layer, the height difference H3 between the middle and the edge of the third light-emitting element, the height difference H4 between the middle and the edge of the fourth light-emitting element, and in the plane where the light-emitting layer is located, the circumscribed circle radius R1 of the orthographic projection of the first light-emitting element, and the circumscribed circle radius R2 of the orthographic projection of the third light-emitting element satisfy (H1-H2) / R1>(H3-H4) / R2.

14. The touch display panel according to claim 13, characterized in that: The light-emitting layer further includes a plurality of fifth light-emitting elements and a plurality of sixth light-emitting elements of the same light-emitting color and the same area, the fifth light-emitting elements are located in the first display area, the sixth light-emitting elements are located in the second display area, and the touch layer covers part of the light-emitting layer; the area of ​​the third light-emitting element is smaller than that of the fifth light-emitting element; Among them, along the thickness direction of the light-emitting layer, the height difference H5 between the middle and the edge of the fifth light-emitting element, the height difference H6 between the middle and the edge of the sixth light-emitting element, and the circumscribed circle radius R3 of the orthographic projection of the fifth light-emitting element in the plane where the light-emitting layer is located, satisfy (H1-H2) / R1>(H3-H4) / R2>(H5-H6) / R3.

15. A touch display device, characterized in that: It comprises the touch display panel as described in any one of claims 1 to 14.

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