Display panel and display device

Abstract

This application discloses a display panel and display device, belonging to the field of display technology. The display panel includes: a driving backplane, a first light-emitting device, an encapsulation layer, a functional layer, and a transparent filling portion. Since the orthographic projection of the dimming opening of the functional layer onto the driving backplane covers the orthographic projection of the first light-emitting device onto the driving backplane, and the transparent filling portion can be distributed within the dimming opening, the light emitted by the first light-emitting device can be directed towards the transparent filling portion. Furthermore, since the refractive index of the transparent filling portion is greater than that of the functional layer, the large-angle light emitted by the first light-emitting device can be totally internally reflected by the inner wall of the dimming opening, resulting in a smaller angle between the reflected light exiting the transparent filling portion and the normal of the display panel, thus reducing the brightness of the large-angle light emitted by the first light-emitting device.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) are hailed as the next generation of display devices due to their advantages such as self-illumination, high efficiency, vibrant colors, thinness, energy saving, and flexibility, and have attracted increasing attention in recent years. Summary of the Invention

[0003] This application provides a display panel and a display device. It solves the problem of poor image quality in existing display panels at wide viewing angles. The technical solution is as follows:

[0004] On the one hand, a display panel is provided, including:

[0005] Drive backplane;

[0006] A first light-emitting device located on one side of the drive backplate;

[0007] The encapsulation layer located on the side of the first light-emitting device away from the driving backplate;

[0008] A functional layer located on the side of the encapsulation layer opposite to the driving backplate has a dimming opening corresponding to the first light-emitting device, and the orthographic projection of the first light-emitting device on the driving backplate is located within the orthographic projection of the dimming opening on the driving backplate.

[0009] In addition, a transparent filling portion is located at least partially within the dimming opening, the refractive index of the transparent filling portion being greater than the refractive index of the functional layer.

[0010] Optionally, the angle between the inner wall of the dimming opening and the side of the functional layer that contacts the encapsulation layer is less than or equal to 90°.

[0011] Optionally, the angle between the inner wall of the dimming opening and the side of the functional layer that contacts the encapsulation layer is greater than or equal to 50°.

[0012] Optionally, the shape of the dimming opening projected onto the driving backplate is the same as the shape of the first light-emitting device projected onto the driving backplate.

[0013] Optionally, the display panel further includes: a first planarization layer covering the functional layer, wherein the refractive index of the first planarization layer is greater than the refractive index of the functional layer, and the portion of the first planarization layer located within the dimming opening is the transparent filling portion.

[0014] Optionally, the transparent filling portion includes: a body portion located within the dimming opening, and a protruding portion located outside the dimming opening, wherein the orthographic projection of the protruding portion on the drive back plate covers the orthographic projection of the body portion on the drive back plate, and the included angle between the side of the protruding portion and the side of the protruding portion close to the body portion is less than or equal to 90°.

[0015] Optionally, the shape of the side of the protrusion facing away from the body portion is the same as the shape of the orthographic projection of the first light-emitting device onto the driving back plate.

[0016] Optionally, the included angles between each side of the protrusion and the side of the protrusion closest to the body portion are all equal and all greater than or equal to 50°.

[0017] Optionally, the display panel includes a plurality of first light-emitting devices, and the plurality of first light-emitting devices are arranged in multiple rows along a first direction and in multiple rows along a second direction, wherein the maximum width of the orthographic projection of the first light-emitting device on the driving back panel in the first direction is greater than the maximum width in the second direction.

[0018] The transparent filling portion further includes an extension portion located outside the dimming opening, the extension portion being arranged on both sides of the protruding portion in the second direction and fixedly connected to the side of the protruding portion.

[0019] Optionally, the maximum width of the orthographic projection of the transparent filling portion onto the drive backplate in the second direction is greater than or equal to the maximum width in the first direction.

[0020] Optionally, the display panel further includes a second planarization layer covering the transparent filler portion, wherein the refractive index of the second planarization layer is less than the refractive index of the transparent filler portion.

[0021] Optionally, the refractive index of the transparent filler portion is greater than the refractive index of the encapsulation layer.

[0022] Optionally, the first light-emitting device is a light-emitting device for emitting red light, and the light-emitting layer in the first light-emitting device comprises a thermally activated delayed fluorescence (TADF) material.

[0023] Optionally, the display panel further includes: a second light-emitting device for emitting green light, and a third light-emitting device for emitting blue light, wherein the first light-emitting device, the second light-emitting device, and the third light-emitting device are disposed on the same layer;

[0024] The orthographic projection of the dimming opening on the driving back plate does not coincide with the orthographic projection of the second light-emitting device on the driving back plate, nor with the orthographic projection of the third light-emitting device on the driving back plate.

[0025] On the other hand, a display device is provided, including: a power supply component, and a display panel electrically connected to the power supply component, the display panel including: the aforementioned display panel.

[0026] The beneficial effects of the technical solutions provided in this application include at least the following:

[0027] A display panel includes a driving backplane, a first light-emitting device, an encapsulation layer, a functional layer, and a transparent filler portion. Since the orthographic projection of the dimming opening of the functional layer onto the driving backplane overlaps the orthographic projection of the first light-emitting device onto the driving backplane, and the transparent filler portion with a higher refractive index can be distributed within the dimming opening, light emitted by the first light-emitting device can be directed towards the transparent filler portion. Of the light entering the transparent filler portion, light with a small viewing angle can pass directly through the transparent filler portion and exit, while light with a large viewing angle can be directed towards the inner wall of the dimming opening. Here, since the refractive index of the transparent filler portion is greater than that of the functional layer, the light with a large viewing angle emitted by the first light-emitting device can be totally internally reflected by the inner wall of the dimming opening, resulting in a smaller angle between the reflected light exiting the transparent filler portion and the normal of the display panel, thus reducing the brightness of the light with a large viewing angle emitted by the first light-emitting device. Therefore, even if the light-emitting layer in the first light-emitting device contains TADF material, the probability of the display panel exhibiting an overall yellowish tint at large viewing angles can be effectively reduced, resulting in a better display effect. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a spectrum of light emitted by a red light-emitting device containing TADF material at different viewing angles;

[0030] Figure 2 This is a schematic diagram of the film layer structure of a display panel provided in an embodiment of this application;

[0031] Figure 3 yes Figure 2 The light path emitted by the first light-emitting device in the display panel is shown;

[0032] Figure 4 This is a schematic diagram of the film layer structure of another display panel provided in an embodiment of this application;

[0033] Figure 5 yes Figure 4 A top view of the display panel is shown;

[0034] Figure 6 This is a top view of a display panel provided in another embodiment of this application;

[0035] Figure 7 yes Figure 6 The diagram shows the film structure of the display panel at point A-A'.

[0036] Figure 8 yes Figure 6 A schematic diagram of the film structure of the display panel at B-B' is shown;

[0037] Figure 9 This application provides a comparison diagram of the CIE trajectory and the degree of white light color deviation in the short side direction when the display panel displays a white image;

[0038] Figure 10 This application provides a comparison diagram of the CIE trajectory and the degree of white light color deviation in the long side direction when the display panel displays a white image;

[0039] Figure 11 This is a top view of another display panel provided in another embodiment of this application;

[0040] Figure 12 yes Figure 11 The diagram shows the film structure of the display panel at point A-A'.

[0041] Figure 13 yes Figure 11 A schematic diagram of the film structure of the display panel at B-B' is shown;

[0042] Figure 14 This is a three-dimensional structural diagram of a protruding portion provided in an embodiment of this application;

[0043] Figure 15 This application provides another comparison diagram of the CIE trajectory and the degree of white light color deviation in the short side direction when the display panel displays a white image;

[0044] Figure 16 This application provides another comparison diagram of the CIE trajectory and the degree of white light color deviation in the long side direction when the display panel displays a white image;

[0045] Figure 17 This is a top view of yet another display panel provided in another embodiment of this application;

[0046] Figure 18 yes Figure 17 The diagram shows the film structure of the display panel at point A-A'.

[0047] Figure 19 yes Figure 17 A schematic diagram of the film structure of the display panel at B-B' is shown;

[0048] Figure 20 This is a three-dimensional structural diagram of the portion of a transparent filling part located outside the dimming opening, provided in an embodiment of this application;

[0049] Figure 21 This application provides another type of display panel and related technology, which presents a CIE trajectory comparison diagram and a white light color deviation degree comparison diagram in the short side direction when the display panel displays a white image;

[0050] Figure 22 This application provides another type of display panel and related technology, which presents a CIE trajectory comparison diagram and a white light color deviation degree comparison diagram in the long side direction when the display panel displays a white image;

[0051] Figure 23 This is a schematic diagram of the film layer structure of a display panel provided in another embodiment of this application. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0053] Currently, in order to meet the high color gamut requirements of display panels, thermally activated delayed fluorescence (TADF) materials need to be set in the light-emitting layer of OLED light-emitting devices.

[0054] For example, the light-emitting layer of the red light-emitting device used to emit red light in a display panel usually contains TADF material. However, due to the limitations of the TADF material itself, the brightness of the light emitted by the red light-emitting device at a large viewing angle (that is, the angle between the emission direction and the normal of the display panel is large) decays more slowly. This causes the display panel to exhibit an overall yellowish tint at large viewing angles, resulting in a poor display effect at large viewing angles.

[0055] For example, please refer to Figure 1 , Figure 1 This is a spectrum of light emitted by a red light-emitting device containing TADF material at different viewing angles. Figure 1 In the diagram, the thick solid line represents the spectrum of light emitted by the red light-emitting device at a 60° angle to the normal of the display panel, i.e., the spectrum of light emitted from the red light-emitting device at a wide viewing angle; the thin solid line represents the spectrum of light emitted by the red light-emitting device at a 0° angle to the normal of the display panel; and the thick dashed line represents the intrinsic spectrum of the TADF material. For the spectrum of light emitted by the red light-emitting device at a 60° angle to the normal of the display panel, a new peak exists at 570 nm, which is also the peak of the TADF intrinsic spectrum. Therefore, the brightness decay of light emitted by the red light-emitting device at a 60° angle to the normal of the display panel is relatively slow.

[0056] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the film layer structure of a display panel provided in an embodiment of this application. The display panel 000 may include: a driving backplate 100, a first light-emitting device 200, an encapsulation layer 300, a functional layer 400, and a transparent filling portion 500.

[0057] The first light-emitting device 200 in the display panel 000 can be one side of the driving backplate 100. Here, the first light-emitting device 200 can be electrically connected to the driving backplate 100, and the driving backplate 100 can drive the first light-emitting device to emit light.

[0058] The encapsulation layer 300 in the display panel 000 is located on the side of the first light-emitting device 200 away from the driving backplate 100. Here, the encapsulation layer 300 is used to encapsulate the first light-emitting device 200 to prevent water and oxygen in the external environment from corroding the light-emitting layer in the first light-emitting device 200, thereby making the first light-emitting device 200 have a longer service life.

[0059] The functional layer 400 in the display panel 000 is located on the side of the encapsulation layer 300 opposite to the driving backplane 100, and the functional layer 400 may have a dimming opening 401 corresponding to the first light-emitting device 200. Here, the orthographic projection of the first light-emitting device 200 on the driving backplane 100 may be located within the orthographic projection of the dimming opening 401 in the functional layer 400 on the driving backplane 100. It should be noted that the display panel 000 typically contains multiple first light-emitting devices 200 arranged in an array. Therefore, the functional layer 400 also needs to have multiple dimming openings 401 corresponding one-to-one with the multiple first light-emitting devices 200, and the orthographic projection of each first light-emitting device 200 on the driving backplane 100 may be located within the orthographic projection of the corresponding dimming opening 401 on the driving backplane 100.

[0060] At least a portion of the transparent filler portion 500 in the display panel 000 may be located within the dimming opening 401, and the refractive index of the transparent filler portion 500 may be greater than the refractive index of the functional layer 400.

[0061] In this embodiment, since the orthographic projection of the dimming opening 401 of the functional layer 400 onto the driving backplate 100 covers the orthographic projection of the first light-emitting device 200 onto the driving backplate 100, and the transparent filling portion 500 with a high refractive index can be distributed within the dimming opening 401, the light emitted by the first light-emitting device 200 can be directed towards the transparent filling portion 500. Wherein, as... Figure 3 As shown, Figure 3 yes Figure 2 The diagram shows the light path emitted by the first light-emitting device in the display panel. Among the light rays incident on the transparent filler portion 500, rays with a small viewing angle (i.e., a small angle between the emission direction and the normal to the display panel) can pass directly through the transparent filler portion 500 and exit, while rays with a large viewing angle (i.e., a large angle between the emission direction and the normal to the display panel) can be directed towards the inner wall of the dimming aperture 401. Here, since the refractive index of the transparent filler portion 500 is greater than that of the functional layer 400, the rays with a large viewing angle emitted by the first light-emitting device 200 can be totally internally reflected by the inner wall of the dimming aperture 401. This results in a smaller angle between the reflected light rays exiting the transparent filler portion 500 and the normal to the display panel, thus reducing the brightness of the rays with a large viewing angle emitted by the first light-emitting device 200.

[0062] In one possible implementation, the first light-emitting device 200 can be a light-emitting device for emitting red light, and the light-emitting layer in the first light-emitting device 200 contains TADF material. In this case, even if the light-emitting layer in the first light-emitting device 200 contains TADF material, the probability of the display panel 000 exhibiting an overall yellowish tint at wide viewing angles can be effectively reduced, thereby improving the display effect of the display panel 000.

[0063] In another possible implementation, the first light-emitting device 200 can also be a light-emitting device for emitting light of other colors (e.g., green or blue light). In this way, when the brightness of the light emitted by the light-emitting device for emitting other colors decays more slowly over a wide viewing angle, the brightness of the light emitted by such a light-emitting device over a wide viewing angle can also be reduced through the interaction of the dimming aperture 401 of the functional layer 400 and the transparent filler portion 500 filling the dimming aperture 401, thereby improving the color calibration of the display image presented by the display panel at a wide viewing angle.

[0064] In summary, the display panel provided in this application includes: a driving backplane, a first light-emitting device, an encapsulation layer, a functional layer, and a transparent filling portion. Since the orthographic projection of the dimming opening of the functional layer onto the driving backplane covers the orthographic projection of the first light-emitting device onto the driving backplane, and the transparent filling portion with a higher refractive index can be distributed within the dimming opening, the light emitted by the first light-emitting device can be directed towards the transparent filling portion. Of the light entering the transparent filling portion, light with a small viewing angle can directly pass through the transparent filling portion and exit, while light with a large viewing angle can be directed towards the inner wall of the dimming opening. Furthermore, since the refractive index of the transparent filling portion is greater than that of the functional layer, the light with a large viewing angle emitted by the first light-emitting device can be totally internally reflected by the inner wall of the dimming opening, resulting in a smaller angle between the reflected light exiting the transparent filling portion and the normal of the display panel, thereby reducing the brightness of the light with a large viewing angle emitted by the first light-emitting device. Thus, even if the light-emitting layer in the first light-emitting device contains TADF material, it can effectively reduce the probability of the display panel appearing yellowish overall at wide viewing angles, thereby improving the display effect of the display panel.

[0065] Please refer to the following in this application: Figure 4 , Figure 4 This is a schematic diagram of the film layer structure of another display panel provided in this application embodiment. The included angle α between the inner wall of the dimming opening 401 of the functional layer 400 in the display panel 000 and the side of the functional layer 400 that contacts the encapsulation layer 300 is less than or equal to 90°. That is, the inner wall of the dimming opening 401 can be a plane that is approximately perpendicular to the side of the encapsulation layer 300 that is away from the driving back plate 100, or the inner wall of the dimming opening 401 can be a slope, and the included angle between the slope and the side of the functional layer 400 that contacts the encapsulation layer 300 is an acute angle.

[0066] In this configuration, the wide-angle light emitted by the first light-emitting device 200, after being reflected by the inner wall of the dimming switch 401, can exit from the side of the transparent filling portion 500 away from the driving backplate 100. This ensures high light extraction efficiency of the first light-emitting device 200 while maintaining low brightness of the wide-angle light emitted by the first light-emitting device 200.

[0067] Optionally, the angle α between the inner wall of the dimming opening 401 of the functional layer 400 in the display panel 000 and the side of the functional layer 400 that contacts the encapsulation layer 300 is greater than or equal to 50°. In this way, the inner wall of the dimming opening 401 can better reflect the light with a wide viewing angle emitted by the first light-emitting device 200.

[0068] In the embodiments of this application, such as Figure 5 The above, Figure 5yes Figure 4 The diagram shows a top view of the display panel. The shape of the dimming opening 401 of the functional layer 400 on the driving back plate 100 can be the same as the shape of the orthographic projection of the first light-emitting device 200 on the driving back plate 100. For example, when the orthographic projection of the first light-emitting device 200 on the driving back plate 100 is hexagonal, the orthographic projection of the dimming opening 401 on the driving back plate 100 is also hexagonal. This ensures that the wide-angle light emitted from each side of the first light-emitting device 200 can be directed onto the corresponding inner wall of the dimming opening 401, allowing the inner wall of the dimming opening 401 to better reflect the wide-angle light emitted from the first light-emitting device 200.

[0069] It should be noted that when the orthographic projection of the first light-emitting device 200 onto the driving backplate 100 is hexagonal, this hexagon can typically be a flattened hexagon. For example, ... Figure 5 As shown, the multiple first light-emitting devices 200 in the display panel 000 can typically be arranged in multiple columns along the first direction X and in multiple rows along the second direction Y. The maximum width of the orthographic projection of the first light-emitting device 200 on the driving backplate 100 in the first direction X is greater than the maximum width in the second direction Y. Therefore, the first direction X is the long side direction of the first light-emitting device 200, and the second direction Y is the short side direction of the first light-emitting device 200.

[0070] It should also be noted that each of the first light-emitting devices 200 in the display panel 000 can be a light-emitting device for emitting red light; or, each of the first light-emitting devices 200 in the display panel 000 can be a light-emitting device for emitting green light or a light-emitting device for emitting blue light; or, the plurality of first light-emitting devices 200 in the display panel 000 can include at least two types of light-emitting devices, wherein the at least two types of light-emitting devices can be light-emitting devices for emitting red light, light-emitting devices for emitting green light, and light-emitting devices for emitting blue light. Therefore, the embodiments of this application do not specifically limit the type of the first light-emitting device 200, and the first light-emitting device 200 belongs to any type of light-emitting device that needs to reduce the brightness of the emitted light at a wide viewing angle.

[0071] In this application, when each of the first light-emitting devices 200 in the display panel 000 is a red light-emitting device, the display panel 000 typically includes, in addition to the first light-emitting devices 200 for emitting red light, a second light-emitting device (not shown in the figure) for emitting green light and a third light-emitting device (not shown in the figure) for emitting blue light. Here, the first light-emitting device 200, the second light-emitting device, and the third light-emitting device in the display panel 000 can be arranged on the same layer. Thus, the red light emitted by the first light-emitting device 200, the green light emitted by the second light-emitting device, and the blue light emitted by the third light-emitting device enable the display panel 000 to display a colored display. It should be noted that the structure of the first light-emitting device 200 can be similar to the structure of the second light-emitting device, and the structure can be similar to the structure of the third light-emitting device; the only difference between these three light-emitting devices is the material of the light-emitting layer.

[0072] Specifically, the orthographic projection of the dimming aperture 401 of the functional layer 400 onto the driving backplate 100 does not coincide with the orthographic projection of the second light-emitting device onto the driving backplate 100, nor with the orthographic projection of the third light-emitting device onto the driving backplate 100. Here, since the brightness attenuation of the wide-angle light emitted by the second and third light-emitting devices is generally within the normal range, there is no need to adjust the wide-angle light emitted by the second and third light-emitting devices through the dimming aperture 401 of the functional layer 400, allowing the wide-angle light emitted by the second and third light-emitting devices to still be emitted normally. Therefore, the dimming opening 401 of the functional layer 400 will only reduce the brightness of the light emitted by the first light-emitting device 200 at a wide viewing angle. The dimming opening 401 will not affect the brightness of the light emitted by the second and third light-emitting devices at a wide viewing angle. In this way, not only can the probability of the display panel 000 appearing yellowish at a wide viewing angle be reduced, but it can also ensure that the display panel 000 can normally display a colorful picture at a wide viewing angle.

[0073] It should be noted that the transparent filling portion 500 within the dimming opening 401 of the functional layer 400 has various structures. This application embodiment will illustrate these structures using the following three optional implementation methods as examples:

[0074] The first optional implementation method, such as Figure 6 , Figure 7 and Figure 8 As shown, Figure 6 This is a top view of a display panel provided in another embodiment of this application. Figure 7 yes Figure 6 The diagram shown illustrates the film structure of the display panel at point A-A'. Figure 8 yes Figure 6The diagram shows the film layer structure of the display panel at point B-B'. Because the maximum width of the orthographic projection of the first light-emitting device 200 onto the driving backplate 100 in the first direction X is greater than its maximum width in the second direction Y, therefore... Figure 7 It can be a cross-sectional view of the first light-emitting device 200 along its long side. Figure 8 This is a cross-sectional view of the first light-emitting device 200 along its short side.

[0075] The display panel 000 may further include a first planarization layer 600 covering the functional layer 400, the first planarization layer 600 having a refractive index greater than that of the functional layer 400. For example, the first planarization layer 600 may be disposed on the side of the functional layer 400 facing away from the driving backplate 100, and the orthographic projection of the functional layer 400 onto the driving backplate 100 may lie within the orthographic projection of the first planarization layer 600 onto the driving backplate. In this case, a portion of the first planarization layer 600 may fill the dimming aperture 401; for this purpose, the portion of the first planarization layer 600 located within the dimming aperture is the transparent filler portion 500 in the display substrate 000.

[0076] For example, please refer to Figure 9 and Figure 10 , Figure 9 This application provides a comparison diagram of the CIE trajectory and the degree of white light color deviation in the short-side direction when the display panel displays a white image. Figure 10 This application provides a comparison diagram of the CIE trajectory and the degree of white light color deviation along the long side of a display panel when displaying a white image. The CIE trajectory represents the color shift trajectory of the display panel in the color gamut diagram when displaying a white image. Its horizontal axis Wx and vertical axis Wy represent the chromaticity values, respectively. The white light color deviation diagram represents the color shift curve of the display panel when displaying a white image. The horizontal axis of the color shift curve represents the viewing angle of the display panel, and the vertical axis represents the color shift value, in JNCD. Figure 9 and Figure 10 In the CIE trajectory comparison diagram, the solid line represents the CIE trajectory of the display panel 000 in the embodiment of this application when displaying a white image, the dashed line represents the CIE trajectory of the display panel in the related art when displaying a white image, and the arrow represents the direction of change of the CIE trajectory; in Figure 9 and Figure 10 In the comparison chart of white light color deviation, the thin solid line represents the color shift curve when the display panel 000 provided in this embodiment displays a white image, and the thick solid line represents the color shift curve when the display panel in the related art displays a white image. Figure 9 and Figure 10As is known, the display panels in related technologies tend to produce a yellowish tint when viewed from a wide angle, while the display panel in this application can effectively improve the luminescence phenomenon when viewed from a wide angle. Furthermore, the display panel provided in this application has a significantly reduced right-angle central deviation (JNCD) value compared to display panels in related technologies, resulting in higher color accuracy of the displayed panel.

[0077] The second optional implementation method, such as Figure 11 , Figure 12 and Figure 13 As shown, Figure 11 This is a top view of another display panel provided in another embodiment of this application. Figure 12 yes Figure 11 The diagram shown illustrates the film structure of the display panel at point A-A'. Figure 13 yes Figure 11 The diagram shows the film layer structure of the display panel at point B-B'. Because the maximum width of the orthographic projection of the first light-emitting device 200 onto the driving backplate 100 in the first direction X is greater than its maximum width in the second direction Y, therefore... Figure 11 It can be a cross-sectional view of the first light-emitting device 200 along its long side. Figure 12 This is a cross-sectional view of the first light-emitting device 200 along its short side.

[0078] The transparent filler portion 500 in the display panel 000 may include a body portion 501 located within the dimming opening 401, and a protruding portion 502 located outside the dimming opening 401. Here, the orthographic projection of the protruding portion 502 in the transparent filler portion 500 onto the driving backplate 100 overlaps the orthographic projection of the body portion 501 onto the driving backplate 100. Furthermore, in the transparent filler portion 500, the angle β between the side surface of the protruding portion 502 and the side of the protruding portion 502 near the body portion 501 is less than or equal to 90°. That is, the side surface of the protruding portion 502 can be a plane substantially perpendicular to the side of the encapsulation layer 300 facing away from the driving backplate 100, or the side surface of the protruding portion 502 can be a slope, and the angle between the slope and the side of the protruding portion 502 near the body portion 501 is an acute angle.

[0079] In this application, the display panel 000 may further include a second planarization layer 700 located on the side of the transparent filling portion 500 facing away from the driving backplate, wherein the refractive index of the second planarization layer 700 is less than the refractive index of the transparent filling portion 500. For example, the second planarization layer 700 may be disposed on the side of the transparent filling portion 500 facing away from the driving backplate 100, and the orthographic projection of the transparent filling portion 500 on the driving backplate 100 and the orthographic projection of the functional layer 400 on the driving backplate 100 may both be located within the orthographic projection of the second planarization layer 700 on the driving backplate 100.

[0080] In this situation, the wide-viewing-angle light emitted from the position of the light-emitting layer of the first light-emitting device 200 that is horizontally closer to the dimming aperture 401 can directly hit the inner wall of the dimming aperture 401, while the wide-viewing-angle light emitted from the position that is horizontally farther from the dimming aperture 401 may not directly hit the inner wall of the dimming aperture 401. These rays can exit from a portion 501 of the transparent filling portion 500 and hit the side of the protruding portion 502 in the transparent filling portion 500. Since the refractive index of the transparent filling portion 500 is greater than the refractive index of the second planarization layer 700, the rays of the wide-viewing-angle light emitted by the first light-emitting device 200 that hit the side of the protruding portion 502 can be totally reflected by the side of the protruding portion 502. The angle between the reflected light and the normal of the display panel when it exits from the transparent filling portion 500 is small. Thus, a portion of the wide-viewing-angle light emitted by the first light-emitting device 200 can be reflected by the inner wall of the dimming aperture 401, while another portion can be reflected by the side of the protruding portion 502 in the transparent filling portion 500. This further reduces the brightness of the wide-viewing-angle light emitted by the first light-emitting device 200.

[0081] Optional, such as Figure 11 As shown, the shape of the orthographic projection of the protruding portion 502 in the transparent filling portion 500 onto the driving back plate 100 is the same as the shape of the orthographic projection of the first light-emitting device 200 onto the driving back plate 100. For example, when the orthographic projection of the first light-emitting device 200 onto the driving back plate 100 is hexagonal, the orthographic projection of the protruding portion 502 onto the driving back plate 100 is also hexagonal. In this way, it can be ensured that the wide-angle light emitted from each side of the first light-emitting device 200 can be directed onto the corresponding side of the protruding portion 502, so that the side of the protruding portion 502 can better reflect the wide-angle light emitted from the first light-emitting device 200.

[0082] To see the structure of the protruding portion 502 in the transparent filling portion 500 more clearly, please refer to... Figure 12 , Figure 13 and Figure 14 , Figure 14 This is a three-dimensional structural schematic diagram of a protruding portion provided in an embodiment of this application. The included angle β between each side of the protruding portion 502 and the side of the protruding portion 502 close to the body portion 501 is equal and greater than or equal to 50°. In this way, each side of the protruding portion 502 can better reflect the light with a large viewing angle emitted by the first light-emitting device 200.

[0083] For example, please refer to Figure 15 and Figure 16 , Figure 15This application provides another comparison diagram of the CIE trajectory and the degree of white light color deviation in the short-side direction when the display panel displays a white image, in accordance with the display panel and related technologies. Figure 16 This application provides another comparison diagram of the CIE trajectory and the degree of white light color deviation in the long side direction when the display panel displays a white image. Figure 15 and Figure 16 The meaning of the coordinate system in the text and Figure 9 and Figure 10 The meaning of the coordinate system is the same as that in [the original text], so it will not be repeated here. Figure 15 and Figure 16 As is known, the display panels in related technologies tend to produce a yellowish tint when viewed from a wide angle, while the display panel in this application can effectively improve the luminescence phenomenon when viewed from a wide angle. Furthermore, the display panel provided in this application has a significantly reduced right-angle central deviation (JNCD) value compared to display panels in related technologies, resulting in higher color accuracy of the displayed panel.

[0084] The third optional implementation method, such as Figure 17 , Figure 18 and Figure 19 As shown, Figure 17 This is a top view of yet another display panel provided in another embodiment of this application. Figure 18 yes Figure 17 The diagram shown illustrates the film structure of the display panel at point A-A'. Figure 19 yes Figure 17 The diagram shows the film layer structure of the display panel at point B-B'. Because the maximum width of the orthographic projection of the first light-emitting device 200 onto the driving backplate 100 in the first direction X is greater than its maximum width in the second direction Y, therefore... Figure 17 It can be a cross-sectional view of the first light-emitting device 200 along its long side. Figure 18 This is a cross-sectional view of the first light-emitting device 200 along its short side.

[0085] Based on the improved structure in the second optional implementation described above, the transparent filling portion 500 in the display panel 000 may further include an extension portion 503 located outside the dimming opening 401.

[0086] To more clearly see the structure of the extension portion 503 in the transparent filling portion 500, and the positional light between the extension portion 503 and the protruding portion 502, please refer to... Figure 20 , Figure 20This is a three-dimensional structural diagram of the portion of a transparent filling part located outside the dimming opening provided in an embodiment of this application. The extension portion 503 in the transparent filling part 500 can be arranged on both sides of the protruding portion 502 in the second direction Y, and is fixedly connected to the side of the protruding portion 502. For example, the body portion 501, the protruding portion 502, and the extension portion 503 in the transparent filling part 500 can all be an integral structure. For instance, after forming the functional layer 400 with the dimming opening 401, a highly refractive transparent film can be formed on the side of the functional layer 400 facing away from the drive backplate 100. Then, a patterning process is performed on this highly refractive transparent film to form the transparent filling part 500 including the body portion 501, the protruding portion 502, and the extension portion 503.

[0087] It should be noted that the transparent filling portion 500 in the third optional implementation here includes an extension portion 503, while the transparent filling portion 500 in the second optional implementation does not include an extension portion. As for other structures in the display panel (e.g., the body portion 501, the protruding portion 502, and the second flat layer 400 are all the same), the other structures in the display panel will not be described in detail here.

[0088] In this application, the first optional implementation described above only utilizes the inner wall of the dimming aperture 401 to reflect the wide-angle light emitted from the first light-emitting device 200. This implementation can effectively reduce the brightness of the wide-angle light emitted from the short side of the first light-emitting device 200. However, because some of the wide-angle light emitted from the long side of the first light-emitting device 200 cannot directly hit the inner wall of the dimming aperture 200, the degree of brightness reduction of the wide-angle light emitted from the long side of the first light-emitting device 200 by this implementation is relatively low.

[0089] The second optional implementation described above not only utilizes the inner wall of the dimming aperture 401 to reflect the wide-angle light emitted from the first light-emitting device 200, but also utilizes the side of the protruding portion 502 to reflect the wide-angle light emitted from the first light-emitting device 200. This implementation can effectively reduce the brightness of the wide-angle light emitted from the long side of the first light-emitting device 200, but it may result in an excessive reduction in the brightness of the wide-angle light emitted from the short side of the first light-emitting device 200.

[0090] In the third optional implementation method mentioned above, such as Figure 17 , Figure 18 and Figure 19As shown, since the transparent filling portion 500 includes extension portions 503 distributed on both sides of the protruding portion 502 in the second direction Y, and the maximum width d1 of the orthographic projection of the transparent filling portion 400 on the driving back plate 100 in the second direction Y is greater than or equal to the maximum width d2 in the first direction X, in the wide-angle light emitted by the first light-emitting device 200 in the short-side direction, the light rays that hit the inner wall of the dimming aperture 401 can be directly reflected by the inner wall of the dimming aperture 401, while the light rays emitted from the body portion 401 pass sequentially through the protruding portion 502 and the extension portions 503, and are emitted from the side of the extension portions 503 away from the driving back plate 100. Therefore, in the wide-angle light emitted by the first light-emitting device 200 in the short-side direction, the light rays emitted from the body portion 401 will not be reflected by the side of the transparent filling portion 500 that intersects with the second planarization layer 700. In this way, it can be ensured that the reduction in brightness of the wide-angle light emitted by the first light-emitting device 200 in the short-side direction is not too large. Furthermore, of the wide-viewing-angle light emitted by the first light-emitting device 200 along its long side, a portion can still be reflected by the inner wall of the dimming aperture 401, and another portion can still be reflected by the side of the protruding portion 502 in the transparent filling portion 500. This effectively reduces the brightness of the wide-viewing-angle light emitted by the first light-emitting device 200 along its long side. Therefore, in the third possible implementation, by providing extension portions 503 on both sides of the protruding portion 502, not only can the brightness of the wide-viewing-angle light emitted by the first light-emitting device 200 along its long side be effectively reduced, but the reduction in brightness of the wide-viewing-angle light emitted by the first light-emitting device 200 along its short side is also ensured to be minimal. This ensures that the image displayed by the display panel 000 at wide viewing angles does not appear yellowish, and that the brightness of the display panel 000 at wide viewing angles is not too low.

[0091] For example, please refer to Figure 21 and Figure 22 , Figure 21 This application provides another type of display panel, which displays a white image and presents a comparison diagram of the CIE trajectory and the degree of white light color deviation along the short side. Figure 22 This application provides another type of display panel, including a CIE trajectory comparison diagram and a white light color deviation comparison diagram when displaying a white image along its long side. Figure 21 and Figure 22 The meaning of the coordinate system in the text and Figure 9 and Figure 10 The meaning of the coordinate system is the same as that in [the original text], so it will not be repeated here. Figure 21 and Figure 22As is known, the display panels in related technologies tend to produce a yellowish tint when viewed from a wide angle, while the display panel in this application can effectively improve the luminescence phenomenon when viewed from a wide angle. Furthermore, the display panel provided in this application has a significantly reduced right-angle central deviation (JNCD) value compared to display panels in related technologies, resulting in higher color accuracy of the displayed panel.

[0092] Optional, such as Figure 23 As shown, Figure 23 This is a schematic diagram of the film layer structure of a display panel according to another embodiment of this application. The refractive index of the encapsulation layer 300 in the display panel 000 is less than the refractive index of the transparent filling portion 500. In this way, it can be ensured that the light emitted by the first light-emitting device 200 that is transmitted from the encapsulation layer 300 and incident on the transparent filling portion 500 will not undergo total internal reflection, thereby making the light-emitting device 200 have a high light extraction efficiency.

[0093] For example, the encapsulation layer 300 may include a first inorganic encapsulation layer 301, an organic encapsulation layer 302, and a second inorganic encapsulation layer 303 stacked together. Here, the second inorganic encapsulation layer 303 is closer to the functional layer 400 than the first inorganic encapsulation layer 301. The refractive index of the transparent filler portion 500 in the display panel 000 may be greater than the refractive index of the second inorganic encapsulation layer 303.

[0094] In this embodiment, the display panel 000 may include: an anode layer, a pixel definition layer 800, a light-emitting layer 202, and a cathode layer 203 stacked on one side of the driving backplate 100. The pixel definition layer 800 has multiple light-emitting devices corresponding one-to-one with multiple pixel openings 801. The anode layer may include multiple anode blocks 201 corresponding one-to-one with the multiple pixel openings 801, and the orthographic projection of each anode block 201 on the driving backplate 100 may lie within the orthographic projection of the corresponding pixel opening 801 on the driving backplate 100. It should be noted that the anode block 201 corresponding to a certain pixel opening 801, the portion of the light-emitting layer 202 located within that pixel opening 801, and the portion of the cathode layer 203 located within that pixel opening 801 can form the light-emitting device corresponding to that pixel opening 801. The light-emitting device may be a first light-emitting device 200 for emitting red light, a second light-emitting device for emitting green light, or a third light-emitting device for emitting blue light.

[0095] Optionally, the driving backplate 101 in the display panel 000 may include a substrate 101 and a plurality of pixel driving circuits 102 located on one side of the substrate 101. The plurality of pixel driving circuits 102 may be electrically connected to a plurality of light-emitting devices in the display panel 000 in a one-to-one correspondence. For example, each pixel driving circuit 102 may be electrically connected to the anode block 201 in the corresponding light-emitting device. Each pixel driving circuit 102 is used to drive the corresponding light-emitting device to emit light, and the plurality of pixel driving circuits 101 are positioned closer to the substrate 101 than the plurality of light-emitting devices.

[0096] In summary, the display panel provided in this application includes: a driving backplane, a first light-emitting device, an encapsulation layer, a functional layer, and a transparent filling portion. Since the orthographic projection of the dimming opening of the functional layer onto the driving backplane covers the orthographic projection of the first light-emitting device onto the driving backplane, and the transparent filling portion with a higher refractive index can be distributed within the dimming opening, the light emitted by the first light-emitting device can be directed towards the transparent filling portion. Of the light entering the transparent filling portion, light with a small viewing angle can directly pass through the transparent filling portion and exit, while light with a large viewing angle can be directed towards the inner wall of the dimming opening. Furthermore, since the refractive index of the transparent filling portion is greater than that of the functional layer, the light with a large viewing angle emitted by the first light-emitting device can be totally internally reflected by the inner wall of the dimming opening, resulting in a smaller angle between the reflected light exiting the transparent filling portion and the normal of the display panel, thereby reducing the brightness of the light with a large viewing angle emitted by the first light-emitting device. Thus, even if the light-emitting layer in the first light-emitting device contains TADF material, it can effectively reduce the probability of the display panel appearing yellowish overall at wide viewing angles, thereby improving the display effect of the display panel.

[0097] This application also provides a display device, which can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. The display device may include a power supply component and a display panel electrically connected to the power supply component. The display panel can be the display panel described in the above embodiments.

[0098] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0099] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0100] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized by, include: Drive backplane; A first light-emitting device located on one side of the drive backplate; The encapsulation layer located on the side of the first light-emitting device away from the driving backplate; A functional layer located on the side of the encapsulation layer opposite to the driving backplate has a dimming opening corresponding to the first light-emitting device, and the orthographic projection of the first light-emitting device on the driving backplate is located within the orthographic projection of the dimming opening on the driving backplate. And, at least partially located within the dimming opening, the refractive index of the transparent filling portion is greater than the refractive index of the functional layer; The transparent filling portion includes: a body portion located inside the dimming opening, and a protruding portion located outside the dimming opening, wherein the orthographic projection of the protruding portion on the drive back plate covers the orthographic projection of the body portion on the drive back plate, and the included angle between the side of the protruding portion and the side of the protruding portion close to the body portion is less than or equal to 90°.

2. The display panel of claim 1, wherein, The angle between the inner wall of the dimming opening and the side of the functional layer that contacts the encapsulation layer is less than or equal to 90°.

3. The display panel according to claim 2, characterized in that, The angle between the inner wall of the dimming opening and the side of the functional layer that contacts the encapsulation layer is greater than or equal to 50°.

4. The display panel according to claim 1, characterized in that, The shape of the dimming opening projected onto the drive backplate is the same as the shape of the first light-emitting device projected onto the drive backplate.

5. The display panel according to any one of claims 1 to 4, characterized in that, The shape of the side of the protruding portion facing away from the body portion is the same as the shape of the orthographic projection of the first light-emitting device on the driving back plate.

6. The display panel according to claim 5, characterized in that, The included angles between each side of the protruding portion and the side of the protruding portion closest to the body portion are all equal and all greater than or equal to 50°.

7. The display panel according to claim 6, characterized in that, The display panel includes a plurality of first light-emitting devices, and the plurality of first light-emitting devices are arranged in multiple rows along a first direction and in multiple rows along a second direction. The maximum width of the orthographic projection of the first light-emitting device on the driving back panel in the first direction is greater than the maximum width in the second direction. The transparent filling portion further includes an extension portion located outside the dimming opening, the extension portion being arranged on both sides of the protruding portion in the second direction and fixedly connected to the side of the protruding portion.

8. The display panel according to claim 7, characterized in that, The maximum width of the orthographic projection of the transparent filling portion onto the drive backplate in the second direction is greater than or equal to the maximum width in the first direction.

9. The display panel according to any one of claims 6 to 8, characterized in that, The display panel further includes a second planarization layer covering the transparent filling portion, wherein the refractive index of the second planarization layer is less than the refractive index of the transparent filling portion.

10. The display panel according to any one of claims 1-4 and 6-8, characterized in that, The refractive index of the transparent filler is greater than that of the encapsulation layer.

11. The display panel according to any one of claims 1-4 and 6-8, characterized in that, The first light-emitting device is a light-emitting device for emitting red light, and the light-emitting layer in the first light-emitting device contains thermally activated delayed fluorescence (TADF) material.

12. The display panel according to claim 11, characterized in that, The display panel further includes: a second light-emitting device for emitting green light, and a third light-emitting device for emitting blue light, wherein the first light-emitting device, the second light-emitting device, and the third light-emitting device are disposed on the same layer; The orthographic projection of the dimming opening on the driving back plate does not coincide with the orthographic projection of the second light-emitting device on the driving back plate, nor with the orthographic projection of the third light-emitting device on the driving back plate.

13. A display device, characterized in that, include: A power supply component, and a display panel electrically connected to the power supply component, the display panel comprising: the display panel according to any one of claims 1 to 12.

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