Display panel and display device

Abstract

Embodiments of the present application disclose a display panel and a display device. The display panel comprises a substrate; a display function layer located on the substrate, the display function layer comprising a plurality of light emitting elements; a light shielding layer located on a side of the display function layer away from the substrate, the light shielding layer being provided with a plurality of openings, the openings exposing the light emitting elements; the light emitting elements comprising first light emitting elements, the openings exposing the first light emitting elements being first openings, the centers of the first light emitting elements having an offset amount along a first direction relative to the centers of the first openings, the first direction being parallel to a plane in which the substrate is located. The technical solution of the embodiments of the present application can improve the uniformity of a display picture of the display panel and improve the display effect.

Description

Technical Field

[0001] The present invention relates to display technology, and more particularly to a display panel and a display device. Background Technology

[0002] With the development of display technology, technologies such as liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs) are widely used in televisions, mobile phones, and public displays. As displays evolve, the range of images they can display becomes increasingly richer, and today's displays are developing towards narrow bezels, high contrast, high resolution, full-color display, low power consumption, high reliability, and long lifespan.

[0003] However, for displays with large screen sizes or curved areas, the viewing angle at the edges or curved areas of a large display differs from that of the center area at a normal viewing angle. This causes brightness variations with the viewing angle, resulting in uneven display and a degraded display quality. Therefore, improving the display uniformity at the edges or curved areas of large displays is a pressing issue for those skilled in the art. Summary of the Invention

[0004] This invention provides a display panel and a display device to improve the uniformity of the displayed image and enhance the display effect.

[0005] In a first aspect, embodiments of the present invention provide a display panel, comprising:

[0006] substrate;

[0007] A display functional layer is located on the substrate, and the display functional layer includes a plurality of light-emitting elements;

[0008] A light-shielding layer is located on the side of the display functional layer away from the substrate. The light-shielding layer has multiple openings that expose the light-emitting element.

[0009] The light-emitting element includes a first light-emitting element, the opening exposing the first light-emitting element is a first opening, the center of the first light-emitting element has an offset along a first direction relative to the center of the first opening, the first direction being parallel to the plane of the substrate.

[0010] Secondly, embodiments of the present invention also provide a display device, including the display panel described above.

[0011] The display panel provided in this embodiment of the invention includes: a substrate; a display functional layer located on the substrate, the display functional layer including a plurality of light-emitting elements; and a light-shielding layer located on the side of the display functional layer away from the substrate, the light-shielding layer having a plurality of openings that expose the light-emitting elements; each light-emitting element includes a first light-emitting element, the opening exposing the first light-emitting element is a first opening, and the center of the first light-emitting element has an offset relative to the center of the first opening along a first direction, the first direction being parallel to the plane of the substrate. In the display panel, the light-emitting elements emit light for displaying the image. The light-shielding layer serves to reduce the reflectivity of non-light-emitting areas and to limit the emission angle of the light emitted by the light-emitting elements. By setting the center of the first light-emitting element to have an offset relative to the center of the first opening along a first direction, the problem of viewing angle shading in some display areas (e.g., the edges of large-area display areas or curved display areas) due to different viewing angles can be avoided, thus improving the uniformity of the display. Attached Figure Description

[0012] Figure 1 This is a top view structural diagram of a display panel provided in an embodiment of the present invention;

[0013] Figure 2 for Figure 1 Enlarged view of region A1 in the middle;

[0014] Figure 3 For along Figure 2 A schematic diagram of the cross-sectional structure of the mid-section line BB′;

[0015] Figure 4 for Figure 1 Another enlarged schematic diagram of region A1 in the middle;

[0016] Figure 5 For along Figure 4 A schematic diagram of the cross-sectional structure of the midline CC′;

[0017] Figure 6 This is a top view schematic diagram of another display panel provided in an embodiment of the present invention;

[0018] Figure 7 A top view structural diagram of another display panel provided in an embodiment of the present invention.

[0019] Figure 8 for Figure 6 Enlarged view of region A2 in the middle;

[0020] Figure 9 for Figure 7 Enlarged view of region A3 in the middle;

[0021] Figure 10 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0022] Figure 11 This is a partial top view of a display panel provided in an embodiment of the present invention;

[0023] Figure 12 A partial top view of another display panel provided in an embodiment of the present invention;

[0024] Figure 13 A schematic diagram of the optical path of a display panel provided in an embodiment of the present invention;

[0025] Figure 14 This is a schematic diagram of the structure of a dielectric layer provided in an embodiment of the present invention;

[0026] Figure 15 This is a schematic diagram of another dielectric layer structure provided in an embodiment of the present invention;

[0027] Figure 16 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;

[0028] Figure 17 for Figure 16 A partial top-view structural diagram of the second display area in the middle;

[0029] Figure 18 A partial top view of another display panel provided in an embodiment of the present invention;

[0030] Figure 19 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0031] Figure 20 This is a top view schematic diagram of a touch function layer provided in an embodiment of the present invention;

[0032] Figure 21 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0034] The terminology used in the embodiments of this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when referring to an element being formed "upper" or "lower" of another element, it can be formed not only directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] With the continuous development of display technology, CFOT (Color Filter On TFE) technology, as an emerging and popular technology, can significantly reduce the power consumption of OLEDs and is compatible with flexible and bendable screens. CFOT technology involves creating a color filter after thin-film encapsulation (TFE), which replaces the polarizer for light filtering. However, a light-shielding layer is placed around the color filter, which can cause viewing angle obstruction in certain areas of the screen (such as curved areas).

[0036] In view of this, embodiments of the present invention provide a display panel, comprising: a substrate; a display functional layer located on the substrate, the display functional layer including a plurality of light-emitting elements; a light-shielding layer located on the side of the display functional layer away from the substrate, the light-shielding layer having a plurality of openings, the openings exposing the light-emitting elements; the light-emitting elements including a first light-emitting element, the opening exposing the first light-emitting element being a first opening, the center of the first light-emitting element having an offset along a first direction relative to the center of the first opening, the first direction being parallel to the plane of the substrate.

[0037] Figure 1 This is a top view schematic diagram of a display panel provided in an embodiment of the present invention, with reference to... Figure 1 The display panel includes a display area AA and a non-display area NA. In the display area AA, the display panel may include multiple pixels for displaying images. In the non-display area NA, the display panel may include peripheral driving circuitry.

[0038] In another embodiment, the display panel includes a display area AA, and a non-display area NA may be located on a portion of the side of the display area AA (e.g., the non-display area is located on the lower side of the display area).

[0039] In another embodiment, the display panel includes a display area AA, and a non-display area may not be provided around the display area AA, that is, the border of the display panel is zero.

[0040] Figure 2 for Figure 1 Enlarged diagram of region A1 in the middle. Figure 3 For along Figure 2 A schematic diagram of the cross-sectional structure of the midline BB′.

[0041] refer to Figure 3 The display panel includes a substrate 10, which can be a rigid substrate, such as a glass substrate or a quartz substrate, or a flexible substrate, such as a polyimide (PI) substrate.

[0042] The display functional layer 20 is located on the substrate 10 and includes multiple light-emitting elements 21. The light-emitting elements 21 can be organic light-emitting diodes (OLEDs). OLEDs generally include a first electrode layer 211, a light-emitting layer 212, and a second electrode layer 213 stacked together. Hole injection layers, hole transport layers, electron injection layers, and electron transport layers can also be added as needed. In other embodiments, the light-emitting elements 21 can also be inorganic light-emitting diodes. The light emitted by the light-emitting elements 21 is used to realize the image display function of the display panel.

[0043] An array layer 70 may also be included between the light-emitting element 21 and the substrate 10. The array layer 70 includes pixel circuits arranged in an array. The pixel circuits may be composed of thin-film transistors, wherein the thin-film transistors may be formed by stacking semiconductor film layers, insulating layers, metal layers and other film layers. Figure 3 An example is shown of a thin-film transistor connected to a light-emitting diode 21. The thin-film transistor can use amorphous silicon, polycrystalline silicon, low-temperature polycrystalline silicon (LTPS), oxide semiconductors, organic semiconductors, etc., as the channel layer. Thin-film transistors can have different types of channel layers. For example, considering the function or manufacturing process of the thin-film transistor, both thin-film transistors including oxide semiconductors and thin-film transistors including LTPS can be included in a single pixel circuit.

[0044] The thin-film encapsulation layer 40 is located on the side of the display functional layer 20 away from the substrate 10 and covers the light-emitting element 21 in the display functional layer 20. The thin-film encapsulation layer 40 is used to prevent water and oxygen from entering the light-emitting element 21, thereby avoiding the failure of the light-emitting element 21. Specifically, the thin-film encapsulation layer 40 may include a stacked structure composed of inorganic and organic layers.

[0045] The light-shielding layer 30 is located on the side of the display functional layer 20 away from the substrate 10. In this embodiment, the light-shielding layer 30 can be disposed above the thin film encapsulation layer 40. The light-shielding layer 30 may include one or both of the touch electrode and the black matrix.

[0046] refer to Figure 2The light-shielding layer 30 has multiple openings 31, each opening 31 exposing a light-emitting element 21. The light-emitting element 21 includes a first light-emitting element 21A. The opening 31 exposing the first light-emitting element 21A is called the first opening 31A. The center of the first light-emitting element 21A has an offset of d relative to the center of the first opening 31A along a first direction x, which is parallel to the plane of the substrate. The light-emitting element 21 also includes a second light-emitting element 21B. The opening 31 also includes a second opening 31B, which exposes the second light-emitting element 21B. The center of the second light-emitting element 21B coincides with the center of the second opening 31B. The dashed box within the first opening 31A represents the position when the center of the first light-emitting element 21A and the center of the first opening 31A are not offset relative to each other, while the solid line represents the position after the first light-emitting element 21A has been offset. Figure 2 The figure shows the offset d of the center of the first light-emitting element 21A at the lower right corner relative to the center of the first opening 31A, where the left straight line passes through the center of the first opening 31A, the right straight line passes through the center of the first light-emitting element 21A, and the distance between the two centers is d.

[0047] It should be noted that the center of the first light-emitting element 21A and the center of the first opening 31A can be understood as the midpoint in one dimension, for example, the midpoint of the first light-emitting element 21A in the first direction x and the midpoint of the first opening 31A in the first direction x. Alternatively, the center of the first light-emitting element 21A and the center of the first opening 31A can be understood as the geometric center in two dimensions, for example, when either the first light-emitting element 21A or the first opening 31A is circular, its center is the center of the circle.

[0048] In display panels including light-shielding layers, light-emitting elements located at different positions on the panel exhibit inconsistent brightness at specific viewing angles due to the influence of the light-shielding layer. For example, in a display screen with curved sides and a flat front, when the user views the flat front portion of the screen directly, the light-emitting elements on the curved sides appear to have lower brightness. The decisive factor affecting this brightness is the distance between one side of the opening in the light-shielding layer exposing the light-emitting element (specifically, the side of the opening closer to the flat front portion, hereinafter referred to as the shielding side) and the light-emitting element. Increasing the distance between the shielding side and the light-emitting element can improve the brightness of the light-emitting element at wider viewing angles. The inventors of this application have discovered that this method easily leads to inconsistencies in the reflectivity and hue of the display panel.

[0049] In CFOT (Completely-In-Time) display panels, the color filter, while acting as a filter instead of a polarizer, also provides anti-reflective properties by absorbing specific wavelengths of ambient light, thus reducing the panel's reflectivity. In other words, the anti-reflective structure in CFOT display panels includes not only the light-shielding layer but also the color filter. Since the light-shielding layer absorbs ambient light more effectively than the color filter, different area ratios of these two components at different locations on the display panel will result in varying reflectivity, affecting the display's performance. Furthermore, the color filter, which filters different wavelengths of light, absorbs different wavelengths when performing its anti-reflective function. Therefore, different area ratios of color filters with different filtering functions can lead to inconsistencies in hue.

[0050] The positions of the light-shielding layer and the color filter are generally complementary. Adjusting the light-shielding layer will directly affect the position of the color filter. When both the light-shielding layer and the color filter contribute to the anti-reflective performance of the display panel to different degrees, the factors affecting reflectivity become more complex when adjusting the light-shielding layer. This increases the difficulty of solving the technical problem of inconsistent reflectivity. Consequently, the changed position of the color filter also affects the hue consistency. This interconnectedness makes it extremely difficult to solve the problem of inconsistent brightness at wide viewing angles.

[0051] In this application, by setting the center of the first light-emitting element 21A to be offset from the center of the first opening 31A, in Figure 2 In the embodiment, the center of the first light-emitting element 21A is offset relative to the first opening 31A towards the edge of the display area. This allows some of the light emitted from the first light-emitting element 21A to tend to deflect towards the central area, which can, to some extent, offset the display unevenness caused by the different viewing angles of the central and edge areas. At the same time, this solution reduces the impact on the area ratio of the light-shielding layer and the color filter, as well as the impact on the area ratio of different functional color filters. In other words, the technical solution of this application does not introduce additional problems of inconsistent reflectivity and inconsistent hue when solving the problem of display unevenness caused by different viewing angles.

[0052] in, Figure 2 The positions of the openings shown remain unchanged (the openings are arranged in a uniform array, i.e., the center distance between two adjacent openings in the first direction x is equal, for example...). Figure 2 and Figure 3 The lengths of line segments ab and bc are equal, where a, b, and c represent the centers of the corresponding openings. The light-emitting element is offset relative to the opening, for example... Figure 2 and Figure 3The length of line segment ef is less than the length of line segment fg, where e, f, and g represent the centers of the corresponding light-emitting elements. In other embodiments, the positions of the light-emitting elements can remain unchanged (the light-emitting elements are arranged in a uniform array, i.e., the center distance between two adjacent light-emitting elements in the first direction is equal), while the position of the opening is offset. The specific implementation can be designed according to the actual situation.

[0053] The term "offset" mentioned in this application does not refer to a relative movement of the position of the light-emitting element or the opening during the use of the display panel. Rather, it refers to a change in the position of the light-emitting element relative to the position of the light-emitting element that coincides with the center of the opening, or a change in the position of the opening relative to the position of the opening that coincides with the center of the light-emitting element, during the design of the display panel.

[0054] It should also be noted that the shape and number of light-emitting elements and openings shown in the accompanying drawings of the embodiments of the present invention are merely illustrative explanations of the technical solutions of the present invention and do not constitute a limitation on the embodiments of the present invention.

[0055] Figure 4 for Figure 1 Another enlarged diagram of region A1 in the middle, Figure 5 For along Figure 4 A schematic diagram of the cross-sectional structure along the midline CC′. (Reference) Figure 4 The light-emitting elements 21 are arranged in an array (if the colors of the light-emitting elements 21 are distinguished, it can be understood that light-emitting elements 21 of the same color are arranged in an array, and the array arrangement of light-emitting elements 21 of different colors can be different). Regarding the position of the opening 31, the dashed line in the figure represents the position of the first opening 31A when the position has not shifted, that is, the position when all openings are arranged in an array, or it can be understood as the position when the center of the first opening 31A coincides with the center of the first light-emitting element 21. The corresponding solid line represents the position after the first opening 31A has shifted. Other structures, reference numerals and corresponding representations are the same as or similar to those in the aforementioned embodiments, and will not be described in detail here. Figure 4 and Figure 5 The lengths of line segments hi and ij are equal, where h, i, and j represent the centers of the corresponding light-emitting elements. The length of line segment kl is greater than the length of line segment lm, where k, l, and m represent the centers of the corresponding openings.

[0056] exist Figure 4In the embodiment, the center of the first opening 31A is offset towards the interior of the display area relative to the center of the first light-emitting element 21A. This also makes some of the light emitted from the first light-emitting element 21A tend to deflect towards the central area, which can, to some extent, offset the display unevenness caused by the different viewing angles of the central and edge areas. At the same time, for the light-emitting element offset technical solution, while designing the light-emitting element offset, the corresponding pixel circuit, the position of the connecting traces, the arrangement, etc. may need to be redesigned. This solution reduces the impact of fabricating unevenly distributed light-emitting elements on the process. In other words, the technical solution of this application does not increase the fabrication difficulty of the display functional layer and the array layer when solving the problem of display unevenness caused by different viewing angles.

[0057] In summary, the technical solution of this invention involves a light-emitting element emitting light for screen display. The light-shielding layer serves two purposes: firstly, to reduce the reflectivity of non-light-emitting areas, and secondly, to limit the emission angle of the light emitted by the light-emitting element. By setting the center of the first light-emitting element to have an offset along a first direction relative to the center of the first opening, the problem of viewing angle shading in some display areas (such as the edge of a large display area or a curved display area) due to different viewing angles can be avoided, thereby improving the uniformity of the display.

[0058] Based on the above embodiments, optionally, the display panel further includes a first display area and a second display area, the first light-emitting element is located in the second display area, and the first direction is the direction from the first display area to the second display area.

[0059] Figure 6 This is a top view schematic diagram of another display panel provided in an embodiment of the present invention. Figure 7 This is a top view schematic diagram of another display panel provided in an embodiment of the present invention. Figure 8 for Figure 6 Enlarged diagram of region A2 in the middle. Figure 9 for Figure 7 A magnified view of region A3 in the middle. (Reference) Figures 6-9 The display panel's display area AA includes a first display area 100 and a second display area 200, wherein... Figure 6 and Figure 8 The diagram schematically shows a display panel including a first display area 100 and two second display areas 200 located on the left and right sides of the first display area 100, with the first direction being from the center to the sides; Figure 7 and Figure 9 The schematic diagram shows a display panel including a display area 100 and second display areas 200 located on the left and right sides and top and bottom sides surrounding the first display area 100. Figure 9 (The second display area located on the upper side is not shown in the image.) Figure 7The first direction is the direction from the center outwards. In other embodiments, the number of second display areas can also be one, which can be set according to actual needs. For example, the second display area can be set only on one side, or, optionally, the first display area and the second display area can be connected and together form the second curved display area. That is, the display area of ​​the display panel can be circular, and the display area around the center is the second curved display area, such as a ring or near-ring display panel used for bracelets, watches, etc. In specific implementations, the first light-emitting element 21A can be located in the area near the edge of the display panel. For example, when the user looks directly at the center area of ​​the display panel, the viewing angle of the edge area is different from that of the center area. The offset direction between the center of the first light-emitting element 21A and the first opening 31A can be... Figure 8 The offset shown in the figure is along the horizontal direction (parallel to the row direction), or Figure 9 The offset shown can be in the horizontal and vertical directions (parallel to the column direction), or it can be offset only in the vertical direction, or it can be offset in the diagonal direction (e.g., the diagonal direction of the light-emitting element).

[0060] Continue to refer to Figure 8 or Figure 9 Optionally, the light-emitting element 21 further includes a second light-emitting element 21B, the opening exposing the second light-emitting element 21B is a second opening 31B, the center of the second light-emitting element 21B coincides with the center of the second opening 31B; the second light-emitting element 21B is located in the first display area 100.

[0061] It is understood that the overlap described here can be interpreted as the center of the second light-emitting element 21B coinciding with the center of the second opening 31B along a direction parallel to the plane of the substrate. In specific implementations, this overlap includes overlap under the condition of process error. For example, during the alignment of the opening and the light-emitting element in the manufacturing of the display panel, the process error is generally within 1μm. If the offset of the center point of the light-emitting element relative to the center point of the opening is within 1μm, it can be understood as overlap.

[0062] With the development of flexible display technology, flexible displays can now display images even in curved areas, resulting in higher screen-to-body ratios and narrower bezels, significantly improving the user experience. The technical solution of this embodiment can be applied to flexible display panels that include curved display areas. Optionally, the first display area is a flat display area, and the second display area is a first curved display area.

[0063] For example, consider a display panel that includes two flexible display areas. Figure 10 This is a side view structural diagram of a display panel provided in an embodiment of the present invention, specifically which can be... Figure 6 The diagram shows a front view of the lower side of the display panel. (Reference) Figure 10The display panel includes a first display area 100 and two second display areas 200, wherein the second display areas 200 are first curved display areas. Since the display surface of the second display areas 200 includes a curved surface, they are generally auxiliary display areas, while the first display area 100 is the main display area. When the user is looking directly at the first display area 100, the display effect of the second display areas 200 will differ from that of the first display area 100 due to viewing angle issues. By setting a preset offset between the light-emitting elements and the corresponding openings in the second display areas, the uniformity of the image between the curved and flat display areas can be improved.

[0064] It should be noted that, Figure 10 The display panel shown is a hyperboloid display panel for illustrative purposes only. In other implementations, the display panel can be a single-curved display panel or a quadruple-curved display panel. The first curved display area can be connected to the planar display area to form a whole display area, or they can be separate display areas. The specific implementation can be designed according to actual needs.

[0065] Optionally, the first curved display area has multiple bending angles, which are the acute angles between the tangent of the first curved display area and the plane of the flat display area; under the same bending angle, the offset of each first light-emitting element is the same.

[0066] For example, continue to refer to Figure 10 The bending angle α of the first curved display is the acute angle between the tangent of the first curved display area and the plane where the flat display area is located. Specifically, the bending angle α gradually increases along the direction from the flat display area to the edge of the display area. The specific bending angle and range can be set according to the actual situation. Figure 11 This is a partial top view of a display panel provided in an embodiment of the present invention. (Reference) Figure 11 The first light-emitting elements 21A in the same column are located at the same bending angle in the first curved display area. Under the same bending angle, the offset of each first light-emitting element 21A is the same.

[0067] Since the viewing angle corresponding to the same curvature angle is the same, setting the offset of the same curvature angle can effectively improve the uniformity of the display. Optionally, the first curved display area has multiple curvature angles, where the curvature angle is the acute angle between the tangent of the first curved display area and the plane where the planar display area is located; as the curvature angle increases, the offset of the first light-emitting element increases.

[0068] Continue to refer to Figure 11 , Figure 11The diagram schematically shows three columns of first light-emitting elements 21A. Along the first direction x (i.e., the direction from the first display area to the second display area), the bending angle gradually increases, and the corresponding offsets d1, d2, and d3 of the first light-emitting elements 21A increase sequentially. That is, the offset of the first light-emitting element 21A is proportional to the bending angle. The dashed box inside the first opening 31A represents the position when the center of the first light-emitting element 21A and the center of the first opening 31A have not shifted relative to each other, and the solid line represents the position after the first light-emitting element 21A has shifted. Figure 11 The diagram shows the offset of the center of the first light-emitting element 21A relative to the center of the first opening 31A in the bottom row. For each offset, the left straight line passes through the center of the first opening 31A, and the right straight line passes through the center of the first light-emitting element 21A. The following embodiments, using the offset of the light-emitting element as an example, are represented in the same way as... Figure 11 The same applies in the case of a hyperboloid display panel. For example, in a hyperboloid display panel, the two first hyperboloid display areas are located on opposite sides of the flat display area. The center of the light-emitting element in the left hyperboloid display area is shifted to the left relative to the corresponding opening, and the center of the light-emitting element in the right hyperboloid display area is shifted to the right relative to the corresponding opening. The offset increases with the increase of the curvature angle, thereby improving the uniformity of the display between the hyperboloid display area and the flat display area.

[0069] Optionally, the first curved display area has multiple bending angles, the bending angle being the acute angle between the tangent of the first curved display area and the plane where the planar display area is located; the first light-emitting element includes a first type of light-emitting element and a second type of light-emitting element, the first opening exposing the first type of light-emitting element is the first type of opening, the first opening exposing the second type of light-emitting element is the second type of opening, the area of ​​the first type of light-emitting element is larger than the area of ​​the second type of light-emitting element, and the area of ​​the first type of opening is larger than the area of ​​the second type of opening; at the same bending angle, the offset corresponding to the first type of light-emitting element is smaller than the offset corresponding to the second type of light-emitting element.

[0070] Display panels typically display color images, requiring the use of various light-emitting elements of different colors, such as red, green, and blue. For OLED display panels, due to the varying lifespans of the light-emitting layers, the areas of different colored light-emitting elements are generally designed to differ. For example, the blue light-emitting element has the largest area, the green light-emitting element the smallest, and the red light-emitting element's area is less than or equal to that of the blue light-emitting element. For example, in one embodiment, the first type of light-emitting element can be either blue or red, and the second type of light-emitting element can be blue. The first type of light-emitting element corresponds to a first type of opening, and the second type of light-emitting element corresponds to a second type of opening. At the same bending angle, the offset corresponding to the first type of light-emitting element is less than the offset corresponding to the second type of light-emitting element. In other embodiments, the offsets corresponding to light-emitting elements of different colors can also be the same. Different colored light-emitting elements can be configured with the same offset rule or different offset rules; this embodiment of the invention does not limit this.

[0071] For example, Figure 12 This is a partial top view schematic diagram of another display panel provided in an embodiment of the present invention. (See reference) Figure 12 The light-emitting element 21 includes a red light-emitting element R21, a green light-emitting element G21, and a blue light-emitting element B21. The red light-emitting element R21 and the blue light-emitting element B21 have equal areas and are classified as first-type light-emitting elements. The green light-emitting element G21 is classified as a second-type light-emitting element. They are at the same bending angle (…). Figure 12 (The offsets of the red light-emitting element R21 and the blue light-emitting element B21 corresponding to the openings in the same column are less than the offset of the green light-emitting element G21.) This is illustrative. Figure 12 The text shows d. R =d B <d G When the opening area is small, the light-emitting angle of the light-emitting element is small. By increasing the corresponding offset, the effect of the small opening area can be balanced. In other embodiments, the areas of the red and blue light-emitting elements can be set to be different. For example, the area of ​​the blue light-emitting element is larger than that of the red light-emitting element, and the offset of the red light-emitting element is greater than that of the blue light-emitting element.

[0072] Optionally, the display panel further includes a dielectric layer located between the display functional layer and the light-shielding layer; the first curved display area has multiple curvature angles, the curvature angle being the acute angle between the tangent of the first curved display area and the plane where the planar display area is located; for the first light-emitting element with a curvature angle α, its corresponding offset d satisfies:

[0073] 0<d≤t·tanθ-t·tanθ0; where,

[0074]

[0075]

[0076] Where t represents the thickness of the dielectric layer, θ represents the critical incident angle when the emission direction of the assumed critical emitted light of the first light-emitting element is parallel to the emission direction of the critical emitted light of the light-emitting element in the first display area that is incident on the dielectric layer and emitted through the corresponding opening edge, with a bending angle of α, θ0 represents the critical incident angle when the emission direction of the light of the light-emitting element in the first display area is incident on the dielectric layer and emitted through the corresponding opening edge, β represents the critical emission angle when the light emitted from the light-emitting element in the first display area to the corresponding opening edge exits the display panel, n represents the refractive index of the dielectric layer, and n0 represents the refractive index of the medium outside the light-emitting surface of the display panel.

[0077] The dielectric layer is a transparent film layer between the display functional layer and the light-shielding layer. Optionally, the dielectric layer includes a thin-film encapsulation layer (TFE). For example, the TFE may include at least one layer of inorganic, organic, and inorganic layers stacked together. In specific implementations, it may include a 1μm inorganic layer, a 6-10μm organic layer, and a 1.3μm inorganic layer. In other embodiments, the TFE may include a greater number of inorganic and organic layers. The bending angle α refers to the bending angle at the center of the corresponding first light-emitting element. When the emission direction of the assumed critical emission light of the first light-emitting element is parallel to the emission direction of the critical emission light incident on the dielectric layer from the edge of the light-emitting element in the first display area and emitted through the corresponding opening edge, the viewing angles of the first and second display areas are the same, which can make the display effects of the first and second display areas uniform. The dielectric outside the light-emitting surface of the display panel can be air.

[0078] For example, taking a hyperbolic display panel as an example, Figure 13 This is a schematic diagram of the optical path of a display panel provided in an embodiment of the present invention. (Reference) Figure 13 In the first display area 100, the distance between the edge of the light-emitting element 21 and the corresponding edge of the light-shielding layer 30 is t·tanθ0. According to the law of refraction, n·sinθ0=n0·sinβ, we can obtain... In the second display area 200, the distance between the edge of the light-emitting element 21 and the corresponding edge of the light-shielding layer 30 is t·tanθ. According to the law of refraction, n·sinθ=n0·sin(β+α), we can obtain... In this embodiment, the offset d is set between 0 and t·tanθ-t·tanθ0, where the offset includes the process error of the alignment between the light-emitting element and the opening during the design.

[0079] Optionally, the dielectric layer includes m sub-dielectric layers with different refractive indices stacked together, where n represents the equivalent refractive index of all sub-dielectric layers, t represents the sum of the thicknesses of all sub-dielectric layers, and θ represents the equivalent incident angle of all sub-dielectric layers.

[0080] n and θ are derived from the following formula:

[0081] n i ·sinθ i =n0·sinβ=n·sinθ;

[0082]

[0083] Where m is an integer greater than or equal to 2, 1≤i≤m, and i is an integer.

[0084] For example, taking m=3 as an example, Figure 14 This is a schematic diagram of a dielectric layer structure provided in an embodiment of the present invention. (Reference) Figure 14 According to the law of refraction, light is refracted once each time it passes through the sub-dielectric layer. Therefore, we have n1·sinθ1=n2·sinθ2=n3·sinθ3=n0·sinβ and t1·tanθ1+t2·tanθ2+t3·tanθ3=t·tanθ. In order to make the angle of light emitted from the curved display area and the flat display area the same, we need to satisfy n0·sinβ=n·sinθ. From this, we can obtain the equivalent refractive index and equivalent incident angle of the dielectric layer.

[0085] Optionally, the display panel may also include a touch function layer; the touch function layer is located between the thin film encapsulation layer and the light-shielding layer; the dielectric layer may also include an inorganic layer in the touch function layer.

[0086] The touch function layer is used to implement the touch function of the display panel. In practice, it can be formed using metal materials or metal oxides. The touch function layer can include a single-layer or double-layer structure. For example... Figure 15 This is a schematic diagram of another dielectric layer structure provided in an embodiment of the present invention. (See reference...) Figure 15 The dielectric layer includes a first inorganic layer 41, a first organic layer 42, a first touch functional layer 51, a second inorganic layer 43, a second touch functional layer 52, and a third inorganic layer 44. The first touch functional layer 51 and the second touch functional layer 52 are relatively thin and generally do not occupy thickness. In actual processes, the second inorganic layer 43 and the third inorganic layer 44 are integrated inorganic layers and serve as inorganic layers in the thin film encapsulation layer.

[0087] The technical solution of this invention is applicable not only to display panels with curved edges, but also to foldable display panels. Optionally, the first display area is a flat display area, and the second display area is a foldable display area.

[0088] Optionally, there are at least two first display areas, and the second display area is located between two adjacent first display areas; the offset increases along both sides of the second display area in the direction pointing towards the center line of the second display area, and the two sides are the sides adjacent to the first display areas.

[0089] For example, Figure 16 This is a schematic diagram of another display panel provided in an embodiment of the present invention. (See reference) Figure 16 The display panel includes two first display areas 100A and 100B and a second display area 200 located between 100A and 100B. 100A and 100B are both flat display areas, and the second display area 200 is a flexible display area, which can fold 100A and 100B together when the second display area 200 is bent.

[0090] Since the second display area 200 is a flexible display area, it will inevitably undergo some deformation during display, for example, it has... Figure 16 The groove shape shown in the figure has a bending angle that changes from both sides of the second display area toward the center line. Figure 17 for Figure 16 A partial top-view structural diagram of the second display area. (Reference) Figure 17 Along the side of the second display area to the center line ( Figure 17 In the direction y (of the dashed line), the offset of the light-emitting element gradually increases, that is... Figure 17 In the case of d2>d1, the design principle of the offset of the light-emitting element in the second display area is symmetrical about the center line of the second display area. That is, the offset increases along both sides of the second display area in the direction pointing to the center line of the second display area, thereby improving the uniformity of the display in the flat display area and the foldable display area.

[0091] It should be noted that, Figure 17 The figure only shows two columns of light-emitting elements located on both sides of the center line of the second display area. Their number and positional relationship are only for schematic purposes to show that the center of the light-emitting element is offset relative to the center of the opening, and are not intended to limit the embodiment of the present invention. The figure is similar to the aforementioned embodiment. The specific arrangement of the light-emitting elements and the corresponding openings can be determined according to the pixel arrangement of the actual display panel.

[0092] In this embodiment of the invention, the uniformity of the first display area and the second display area is improved by setting a certain offset between the first light-emitting element and the corresponding first opening. The second display area can be a curved display area. In specific implementation, the offsets corresponding to all the first light-emitting elements in the second display area can be set to be the same, for example, when the curvature angle of the curved display area changes little. Alternatively, the offsets corresponding to at least two first light-emitting elements can be set to be different, for example, the second display area can be divided into multiple sub-regions, with the offsets corresponding to the first light-emitting elements in each sub-region being the same, and the offsets corresponding to each sub-region being different. For example, the display area of ​​the curved display area is larger, while the curvature angle changes slowly, which can reduce the design difficulty. Alternatively, the offsets corresponding to each first light-emitting element can be set to increase along the first direction, which can maximize the consistency between the display effect of the second display area and the display effect of the first display area.

[0093] In one embodiment of the present invention, to achieve an offset of the first light-emitting element relative to the corresponding first opening along a first direction, the position of the first opening can be adjusted without changing the position of the first light-emitting element. Optionally, in the second display area, the first light-emitting elements are arranged in an array, and the first opening has an offset relative to the first light-emitting element it exposes along an offset opposite to the first direction.

[0094] It is understood that, in this embodiment, the array arrangement of the first light-emitting elements can be interpreted as the distance between the centers of two adjacent first light-emitting elements being the same along the row direction and the distance between the centers of two adjacent first light-emitting elements being the same along the column direction. The distance between the centers of two adjacent first light-emitting elements in the row and column directions can be the same or different. For light-emitting elements including multiple different light-emitting colors (e.g., red, blue, and green light-emitting elements), the arrangement of the same type of light-emitting elements is arrayed, but for the same pixel unit (e.g., including one light-emitting element, one blue light-emitting element, and one green light-emitting element), the specific arrangement of its sub-pixels is not limited, and can be designed according to the actual situation in specific implementation.

[0095] For example, a light-emitting element is shown in a display panel. Figure 18 This is a partial top view schematic diagram of another display panel provided in an embodiment of the present invention. (See reference) Figure 18Within the second display area, the first light-emitting elements 21A are arranged in an array with equal spacing (the center line connecting the four first light-emitting elements in two adjacent rows and two columns forms a square, for example, the line connecting D, E, F, and G in the figure forms a square, where D, E, F, and G represent the centers of the corresponding first light-emitting elements). The offset between the first light-emitting elements and their corresponding first openings is achieved by changing the position of the first opening 31A. The dashed box corresponding to the first opening 31A indicates the position where the first opening 31A has not been offset, and the solid box indicates the position after offset. It can be understood that when the first opening is offset, the width of the corresponding light-shielding layer narrows; the specific width of the light-shielding layer is determined by the amount of offset.

[0096] In another embodiment, the position of the first light-emitting element can be adjusted without changing the position of the first opening. Optionally, in the second display area, the first openings are arranged in an array, and the first light-emitting element has an offset along a first direction relative to the first opening that exposes it.

[0097] It is understood that in this embodiment, the arrangement of the first openings in an array is similar to that in the embodiments described above, and the first opening corresponds to the first light-emitting element. Along the row direction of the array, the distance between the centers of two adjacent first openings is the same, and along the column direction of the array, the distance between the centers of two adjacent first openings is also the same. The distance between the centers of two adjacent first openings in the row and column directions can be the same or different. For light-emitting elements including multiple different light-emitting colors, multiple corresponding first openings can be provided, and each type of first opening is arranged in an array.

[0098] Taking the first opening as an example, continue to refer to... Figure 11 Optionally, in the second display area, along the first direction, the distance between adjacent first openings 31A is the same. That is, line segments HI and IJ in the figure have equal lengths, where H, I, and J are the centers of the corresponding first openings, respectively. The offset between the first light-emitting element 21A and the corresponding first opening is achieved by changing the position of the first light-emitting element 21A.

[0099] Optionally, in a specific implementation, along the first direction, the distance between adjacent first openings in the second display area is equal to the distance between adjacent openings in the first display area. The area proportion of the opening in the first display area is the same as the area proportion of the opening in the second display area.

[0100] By setting the distance between the openings of the first display area and the second display area to be the same, and the area ratio of the opening in the first display area to the area ratio of the opening in the second display area to be the same, that is, the first display area and the second display area have the same aperture ratio and opening setting method, it can be ensured that the first display area and the second display area have the same reflectivity and hue, thereby improving the display consistency between the first display area and the second display area.

[0101] Optional, continue to refer to Figure 8 or Figure 9 The area of ​​the opening is larger than the area of ​​the light-emitting element it exposes.

[0102] It is understandable that the light emitted from the light-emitting element has a certain emission angle. Since the opening is located above the light-emitting element, by setting the opening area to be larger than the corresponding area of ​​the light-emitting element, the loss of light emitted from the light-emitting element can be minimized. Furthermore, the areas of all the first openings are the same. By setting the areas of all the first openings to be the same, the manufacturing process can be simplified and costs reduced. In addition, in this embodiment, since the areas of all openings are the same, the area of ​​the light-shielding layer is also the same, which can prevent changes in reflectivity and hue at different locations on the display panel. This avoids additional problems of inconsistent reflectivity and hue when addressing the issue of uneven display caused by different viewing angles.

[0103] Optionally, the shape of the opening is the same as the shape of the light-emitting element.

[0104] The embodiments of the present invention do not specifically limit the shape of the opening and the light-emitting element, and can be selected according to the actual situation. For example, it can be a square, rectangle, rhombus, circle, rounded rectangle, octagon, etc.

[0105] In other embodiments, the shape of the opening may be different from the shape of the light-emitting element. For example, the opening may be a rounded rectangle and the light-emitting element may be a rectangle, or the opening may be a circle and the light-emitting element may be a rectangle. This embodiment of the present invention does not limit this.

[0106] Regarding the specific film layer structure of the display panel Figure 19 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, wherein... Figure 19 The diagram shows the structure of the first display area. The second display area has the same overall structure as the first display area, except that the light-emitting elements and their corresponding openings are offset in relative position. (Reference) Figure 19The display panel includes a substrate 10; wherein the substrate 10 may be flexible, and thus stretchable, foldable, bendable, or rollable, such that the display panel may be stretchable, foldable, bendable, or rollable. The substrate 10 may be formed of any suitable insulating material having flexibility. The substrate 10 may be used to block oxygen and moisture, prevent moisture or impurities from diffusing through the substrate 10, and a flat surface may be formed on the upper surface of the substrate 10. For example, it may be formed of polymer materials such as polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyaryl compounds (PAR), or glass fiber reinforced plastic (FRP), and the substrate 10 may be transparent, translucent, or opaque. Optionally, the display panel may also include a buffer layer located on the substrate 10. Figure 17 (Not shown in the image), the buffer layer can cover the entire upper surface of the substrate 10. The substrate 10 can also be rigid, for example, it can be a glass substrate, thereby forming a rigid display panel.

[0107] An array layer 70 is located on one side of the substrate 10; specifically, the array layer 70 is located on the side of the substrate 10 facing the display surface of the display panel. The array layer 70 may include multiple thin film transistors 71 (TFTs) and pixel circuits composed of the thin film transistors 71, used to drive the light-emitting elements in the display functional layer. Exemplarily, this embodiment uses a top-gate type thin film transistor as an example for structural description. The thin film transistor layer 71 includes: an active layer 711 located on the substrate 10; the active layer 711 may be made of amorphous silicon, polycrystalline silicon, or metal oxide, etc. When the active layer 711 is made of polycrystalline silicon, it can be formed using low-temperature amorphous silicon technology, that is, amorphous silicon material is formed into polycrystalline silicon material by laser melting. In addition, various methods such as rapid thermal annealing (RTA), solid-state crystallization (SPC), excimer laser annealing (ELA), metal-induced crystallization (MIC), metal-induced lateral crystallization (MILC), or continuous lateral curing (SLS) can also be used. The active layer 711 further includes a source region and a drain region formed by doping with N-type or P-type impurity ions, forming a channel region between the source and drain regions. The array layer 70 also includes a gate insulating layer 712 located on the active layer 711; the gate insulating layer 712 includes an inorganic layer such as silicon oxide or silicon nitride, and may include a single layer or multiple layers. The thin-film transistor layer 71 also includes a gate 713 located on the gate insulating layer 712; the gate 713 may include a single layer or multiple layers of gold (Au), silver (Ag), copper (Cu), nickel (Ni), platinum (Pt), palladium (Pd), aluminum (Al), molybdenum (MO), or chromium (Cr), or such as an aluminum (Al):neodymium (Nd) alloy or a molybdenum (MO):tungsten (W) alloy, which may be selected according to the specific implementation. The array layer 70 also includes an interlayer insulating layer 714 located on the gate 713; the interlayer insulating layer 714 may include inorganic or organic materials. The inorganic material may include at least one selected from silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, and silicon oxynitride. The organic material may include at least one selected from acrylic resins, methacrylic resins, polyisoprene, vinyl resins, epoxy resins, urethane resins, cellulose resins, and perylene resins. The thin-film transistor layer 71 also includes a source electrode 7151 and a drain electrode 7152 located on the interlayer insulating layer 714. The source electrode 7151 and the drain electrode 7152 are electrically connected to the source region and the drain region, respectively, through contact holes, which may be formed by selectively removing the gate insulating layer 712 and the interlayer insulating layer 714.

[0108] The array layer 70 may further include a passivation layer 72. Optionally, the passivation layer 72 is located on the source electrode 7151 and drain electrode 7152 of the thin-film transistor 71. The passivation layer 72 may be formed of an inorganic material such as silicon oxide or silicon nitride, or it may be formed of an organic material. The display panel may further include a planarization layer 73. Optionally, the planarization layer 73 is located on the passivation layer 72. The planarization layer 73 may include an organic material such as acrylic, polyimide (PI), or benzocyclobutene (BCB), and the planarization layer 73 has a planarization effect.

[0109] A display functional layer 20 is located on the side of the array layer 70 facing away from the substrate 10. The display functional layer 20 includes a plurality of light-emitting elements 21. Optionally, the display functional layer 20 is located on the planarization layer 73. The display functional layer 20 includes an anode layer 211, an intermediate layer 212, and a cathode layer 213 sequentially disposed in a direction away from the substrate 10. The anode layer 211 can be formed of various conductive materials. For example, the anode layer 211 can be formed as a transparent electrode or a reflective electrode depending on its application. When the anode is formed as a transparent electrode, it can include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In2O3), etc. When the anode is formed as a reflective electrode, the reflective layer can be formed of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), or mixtures thereof, and ITO, IZO, ZnO, or In2O3, etc., can be formed on the reflective layer. Intermediate layer 212 may comprise a low-molecular-weight material or a high-molecular-weight material. When intermediate layer 212 comprises a low-molecular-weight material, it may comprise an emitter layer (EML), and may further comprise at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL). Intermediate layer 212 may comprise various organic materials, such as copper phthalocyanine (CuPc), N,N'-bis(naphthyl-1-yl)-N,N'-diphenyl-benzidine (NPB), or tris-8-hydroxyquinoline-aluminum (Alq3). Intermediate layer 212 may be formed by vapor deposition.

[0110] When the intermediate layer 212 comprises a polymer material, the intermediate layer 212 may include HTL and EML. HTL may include PEDOT, and EML may include polyphenylenevinyl chloride (PPV) and polyfluorene polymer materials. The intermediate layer 212 may be formed by screen printing, inkjet printing, or laser-induced thermal imaging (LITI), etc.

[0111] However, the intermediate layer 212 is not limited to the example above. The intermediate layer 212 may include a single layer spanning multiple anode layers 211 or multiple layers patterned relative to each of the anode layers 211. The display functional layer 20 also includes a pixel definition layer 22 located on the side of the anode layers 211 away from the array layer 70. The size of the light-emitting element 21 is determined by the opening size of the pixel definition layer 22; in this embodiment, the center of the light-emitting element 21 is the center of the opening of the pixel definition layer 22. Figure 19 The diagram shown is a cross-sectional view, with the center being the midpoint of the bottom of the opening formed by the pixel definition layer 22. The actual opening on the display panel is a two-dimensional shape, with its center being the geometric center of the opening. The pixel definition layer 22 can be formed from organic materials such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin, or phenolic resin, or from inorganic materials such as SiNx. When the cathode layer 213 is formed as a transparent electrode, compounds with low work functions, such as lithium (Li), calcium (Ca), lithium fluoride / calcium (LiF / Ca), lithium fluoride / aluminum (LiF / Al), aluminum (Al), magnesium (Mg), or combinations thereof, can be initially deposited on the light-emitting layer by evaporation, and transparent electrode forming materials such as ITO, IZO, ZnO, or In2O3 can be deposited on these compounds. When the cathode is formed as a reflective electrode, it can be formed by evaporating Li, Ca, LiF / Ca, LiF / Al, Al, Mg, or mixtures thereof across the entire surface of the substrate.

[0112] Optionally, the anode layer 211 includes a plurality of anode patterns corresponding one-to-one with each pixel. The anode patterns in the anode layer 211 are connected to the source electrode 7151 or drain electrode 7152 of the thin-film transistor 71 through vias on the planarization layer 73. The pixel definition layer 22 includes a plurality of openings exposing the anode layer 211, and the pixel definition layer 22 may cover the edges of the patterns in the anode layer 211. The intermediate layer 212 at least partially fills the openings in the pixel definition layer 22 and contacts the anode layer 211.

[0113] Optionally, the anode layer 211, intermediate layer 212, and cathode layer 213 defined by the opening of each pixel definition layer 22 constitute the light-emitting element 21 (i.e., Figure 19 (As shown in the dashed box), each light-emitting element 21 can emit light of different colors according to different intermediate layers 212. Each light-emitting element 21 constitutes a sub-pixel, and multiple sub-pixels work together to display the image.

[0114] Optionally, the display panel further includes an encapsulation layer 40 located on the display functional layer 20 and completely covering the display functional layer 20 to seal the display functional layer 20. To achieve planarization of the display functional layer 20, a planarization layer 23 is also disposed above the display functional layer 20. Optionally, the encapsulation layer 40 can be a thin-film encapsulation layer located on the planarization layer 23, including a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially disposed along a direction away from the substrate 10. Figure 19 (The specific film layer of the encapsulation layer 40 is not shown in the diagram) and is used to prevent water and oxygen from corroding the light-emitting element 21. Of course, in other optional embodiments of the present invention, the encapsulation layer 40 may include any number of stacked organic and inorganic materials as needed, but may include at least one layer of organic material and at least one layer of inorganic material deposited alternately, and the bottom and top layers may be composed of inorganic materials.

[0115] The display panel also includes a touch function layer 50, which includes multiple touch electrodes for implementing touch functionality. In practice, self-capacitance or mutual capacitance methods can be used. The touch function layer 50 can have a single layer of touch electrodes, a double layer of touch electrodes, or a metal mesh touch electrode. The metal mesh touch electrode includes multiple metal lines extending along two intersecting directions, with the metal lines extending in different directions intersecting to form a mesh. The appropriate method can be selected based on the specific implementation. For example... Figure 20 This is a top view schematic diagram of a touch functional layer provided in an embodiment of the present invention. Taking mutual capacitance as an example, the touch functional layer includes multiple touch driving electrodes 501 and touch sensing electrodes 502. Each touch sensing electrode 501 and touch sensing electrode 502 is directly electrically connected to a touch trace 503. When the touch functional layer includes multiple layers, the insulating layer between the touch functional layers can be reused as an inorganic layer in the thin film encapsulation layer.

[0116] The display panel also includes a light-shielding layer 30 and a color resist layer 32 located above the thin film encapsulation layer 40. The color resist layer 32 includes multiple color resists disposed in the openings. The color of the color resist is the same as the color of the corresponding light-emitting element and is used to transmit the light emitted from the light-emitting element. The design scheme of using color resists instead of polarizers is conducive to realizing flexible display of the display panel.

[0117] The display panel also includes a protective layer 60 located on the light-shielding layer 30. Optionally, the protective layer 60 is the outermost film layer of the display panel, which can be a protective cover or a protective film. The protective layer 60 can be bonded to the adjacent film layers inside the display panel using optically clear adhesive (OCA). For touch display panels, the surface of the protective layer 60 is the touch operation surface of the display panel.

[0118] Figure 21This is a schematic diagram of a display device provided in an embodiment of the present invention. (Reference) Figure 21 The display device 1 includes any of the display panels 2 provided in the embodiments of the present invention. Specifically, the display device 1 can be a device with display function, such as a mobile phone, a computer, or a smart wearable device.

[0119] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a display functional layer on the substrate, the display functional layer comprising a plurality of light emitting elements; a light shielding layer on a side of the display functional layer away from the substrate, the light shielding layer being provided with a plurality of openings corresponding to exposure of one of the light emitting elements; wherein the light shielding layer comprises one or both of a touch electrode and a black matrix; the light emitting elements comprising a first light emitting element, the opening exposing the first light emitting element being a first opening, the center of the first light emitting element having an offset in a first direction relative to the center of the first opening, the first direction being parallel to the plane in which the substrate lies; a first display area and a second display area, the first light emitting element being located in the second display area; the first direction being a direction from the first display area to the second display area; the first display area being a planar display area, the second display area being a first curved display area or a foldable display area; the first curved display area having a plurality of bending angles, the bending angle being an acute angle between a tangent of the first curved display area and the plane in which the planar display area lies; the first light emitting element comprising a first type of light emitting element and a second type of light emitting element, the first type of light emitting element and the second type of light emitting element having different light emitting colors, the first opening exposing the first type of light emitting element being a first type of opening, the first opening exposing the second type of light emitting element being a second type of opening, the area of the first type of light emitting element being greater than the area of the second type of light emitting element, the area of the first type of opening being greater than the area of the second type of opening; under the same bending angle, the offset corresponding to the first type of light emitting element being less than the offset corresponding to the second type of light emitting element; the display panel further comprising a medium layer between the display functional layer and the light shielding layer; for the first light emitting element with a bending angle of α, the corresponding offset d satisfies: ; wherein, ； ； wherein t represents the thickness of the medium layer, θ represents a critical incidence angle when the exit direction of the hypothetical critical exit light ray of the first light emitting element is parallel to the exit direction of the critical exit light ray of the light emitting element edge in the first display area incident to the medium layer and exiting through the corresponding opening edge under the bending angle of α, θ0 represents the critical incidence angle of the light emitting element edge in the first display area incident to the medium layer and exiting through the corresponding opening edge, β represents the critical exit angle of the light emitting element edge in the first display area exiting to the corresponding opening edge light ray exiting the display panel, n represents the refractive index of the medium layer, and n0 represents the refractive index of the medium outside the light exit surface of the display panel.

2. The display panel of claim 1, wherein: the light emitting elements further comprise a second light emitting element, the opening exposing the second light emitting element being a second opening, the center of the second light emitting element coinciding with the center of the second opening; the second light emitting element being located in the first display area.

3. The display panel of claim 1, wherein, under the same bending angle, the offset corresponding to each of the first light emitting elements being the same.

4. The display panel of claim 1, wherein, With the increase of the bending angle, the offset corresponding to the first light emitting element increases.

5. The display panel of claim 1, wherein, The medium layer comprises m layers of sub-medium layers with different refractive indexes arranged in a stack, n represents the equivalent refractive index of all the sub-medium layers, t represents the sum of the thicknesses of all the sub-medium layers, and θ represents the equivalent incident angle of all the sub-medium layers. n and θ are obtained according to the following formula: ； ； wherein m is an integer greater than or equal to 2, 1≤i≤m, and i is an integer.

6. The display panel of claim 1, wherein, The medium layer comprises a thin film encapsulation layer.

7. The display panel of claim 6, wherein, Further comprising a touch function layer; The touch function layer is located between the thin film encapsulation layer and the light shielding layer. The medium layer further comprises an inorganic layer in the touch function layer.

8. The display panel of claim 1, wherein, The number of the first display areas is at least two, and the second display area is located between two adjacent first display areas. The offset increases along two sides of the second display area, respectively, in the direction of the center line of the second display area, and the two sides are respectively adjacent sides to the first display area.

9. The display panel of claim 1, wherein, The first display area and the second display area are connected and jointly constitute a second curved display area.

10. The display panel of claim 1, wherein, Along the first direction, the offset corresponding to each first light emitting element increases.

11. The display panel of claim 10, wherein, In the second display area, the distance between adjacent first openings along the first direction is the same.

12. The display panel of claim 10, wherein, Along the first direction, the distance between adjacent first openings in the second display area is equal to the distance between adjacent openings in the first display area.

13. The display panel of claim 1, wherein, The offsets corresponding to at least two first light emitting elements are different.

14. The display panel of claim 1, wherein, The area of the opening is greater than the area of the light emitting element exposed thereby.

15. The display panel of claim 1, wherein, The areas of the first openings are the same.

16. The display panel of claim 1, wherein, The shape of the opening is the same as the shape of the light emitting element.

17. The display panel of claim 1, wherein, The area ratio of the opening in the first display area is the same as the area ratio of the opening in the second display area.

18. The display panel of claim 1, wherein, In the second display area, the first light emitting elements are arranged in an array, and the first openings have an offset along a direction opposite to the first direction with respect to the first light emitting elements exposed thereby.

19. The display panel of claim 1, wherein, In the second display area, the first openings are arranged in an array, and the first light emitting elements have an offset along the first direction with respect to the first openings exposed thereby.

20. The display panel of claim 1, wherein, Further comprising a color resist layer, the color resist layer comprising a plurality of color resists arranged in the openings, the color of the color resist being the same as the color of the corresponding light emitting element.

21. The display panel of claim 1, wherein the display functional layer further comprises a pixel definition layer, the pixel definition layer comprises a plurality of openings, and the light emitting element is located in the opening.

22. A display device comprising: The display panel of any one of claims 1-21.

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