Display panel and display device

Abstract

The present application discloses a display panel and a display device, relating to the field of display technology, capable of improving the contrast and visibility of the display device when used in outdoor environments with strong light. The display panel comprises: a substrate layer, one side of which is provided with a plurality of light-emitting devices, with a pixel-defining structure disposed between adjacent light-emitting devices; a photochromic structure disposed on a side of the light-emitting devices away from the substrate layer, the orthographic projection of the photochromic structure on the substrate layer falling within the orthographic projection of the pixel-defining structure on the substrate layer; the photochromic structure is configured to darken in color when the amount of light absorbed reaches a critical point.

Description

Technical Field

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

[0002] At present, with the rapid development of display technology, the integration technology of touch function and other sensing functions of display devices is becoming more and more mature. In addition, the full-screen appearance with a high screen-to-body ratio is becoming more and more common. However, there are still some technical problems in the existing display technology that need to be broken through.

[0003] To meet the needs of display driving, appearance optimization, or other sensing functions, the electrodes or traces in the display panel must be made of conductive materials with a reflective effect, such as metals or alloys. Ambient light outside the display panel will be reflected by the reflective conductive material. When users use the display device outdoors in strong light, the reflection of sunlight on the reflective conductive material is more severe, resulting in low contrast and visibility of the display device in outdoor environments. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a display device, which can improve the contrast and visibility of the display device when used in an outdoor environment with strong light.

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0006] A substrate layer, wherein a plurality of light-emitting devices are disposed on one side of the substrate layer, and a pixel defining structure is disposed between adjacent light-emitting devices;

[0007] a photochromic structure, disposed on a side of the light-emitting device away from the substrate layer, wherein an orthographic projection of the photochromic structure on the substrate layer falls within an orthographic projection of the pixel-defining structure on the substrate layer;

[0008] The photochromic structure is configured to darken in color when the amount of light absorbed reaches a critical point.

[0009] In some embodiments, the photochromic structure is configured to change color to black when the amount of light absorbed reaches a critical point.

[0010] In some embodiments, the display panel further includes:

[0011] an encapsulation layer, disposed on a side of the light-emitting device away from the substrate layer, the encapsulation layer covering the light-emitting device;

[0012] The photochromic structure is arranged on a side of the encapsulation layer away from the light-emitting device.

[0013] In some embodiments, the display panel further includes:

[0014] an encapsulation layer, disposed on a side of the light-emitting device away from the substrate layer, the encapsulation layer covering the light-emitting device;

[0015] a polarizer, disposed on a side of the encapsulation layer away from the light-emitting device;

[0016] The photochromic structure is arranged on a side of the polarizer away from the encapsulation layer; and / or,

[0017] an optical adhesive layer, disposed on a side of the encapsulation layer away from the light-emitting device;

[0018] The photochromic structure is arranged on a side of the optical adhesive layer away from the encapsulation layer; and / or,

[0019] A touch layer is provided on a side of the encapsulation layer away from the light-emitting device;

[0020] The photochromic structure is disposed on a side of the touch layer away from the encapsulation layer.

[0021] In some embodiments, the orthographic projection of the photochromic structure on the substrate layer surrounds the orthographic projection of the light-emitting device on the substrate layer; and / or,

[0022] In a direction perpendicular to the shape extension of the photochromic structure, the cross-sectional shape of the photochromic structure is a trapezoid, the lower base of the trapezoid is close to the substrate layer, the upper base of the trapezoid is away from the substrate layer, and the shape extension direction of the photochromic structure is parallel to the plane where the substrate layer is located; and / or,

[0023] The material of the photochromic structure includes one or more of transition metal oxides, rare earth-doped calcium fluoride, methyl viologen, azobenzene, diarylethenes and spirofurans.

[0024] In some embodiments, the pixel-defining structure between adjacent light-emitting devices includes at least two convex portions and at least one concave portion, and the concave portion is disposed between adjacent convex portions;

[0025] A reflective layer is provided on the surface of the convex portion.

[0026] In some embodiments, the width of the protrusion at an end away from the substrate layer is smaller than the width of the protrusion at an end close to the substrate layer.

[0027] In some embodiments, the farthest end of the protrusion away from the substrate layer is lower than the surface of the light-emitting device away from the substrate layer, or the farthest end of the protrusion away from the substrate layer is coplanar with the surface of the light-emitting device away from the substrate layer.

[0028] In some embodiments, the pixel defining structure includes a base layer, and the convex portion and the concave portion are arranged on a side of the base layer away from the substrate layer;

[0029] The farthest end of the protrusion away from the substrate layer exceeds the surface of the light emitting device away from the substrate layer.

[0030] In some embodiments, the orthographic projection of the photochromic structure on the substrate layer falls within the orthographic projection of the protrusion on the substrate layer.

[0031] In some embodiments, when the cross-sectional shape of the protrusion perpendicular to the direction in which the shape of the protrusion extends is a trapezoid, the orthographic projection of the photochromic structure on the substrate layer covers the orthographic projection of the upper base of the trapezoid on the substrate layer, and the shape extension direction of the protrusion is parallel to the plane on which the substrate layer is located;

[0032] When the cross-sectional shape of the convex portion perpendicular to the extension direction of the convex portion is triangular, the orthographic projection of the photochromic structure on the substrate layer covers the orthographic projection of the end of the triangle away from the substrate layer on the substrate layer.

[0033] In some embodiments, the protrusions correspond to the photochromic structures in a one-to-one manner.

[0034] In some embodiments, the refractive index of the reflective layer is greater than the refractive index of the convex portion; and / or,

[0035] An auxiliary reflective layer is provided between the pixel defining structure and the reflective layer, and the refractive index of the auxiliary reflective layer is smaller than the refractive index of the reflective layer; and / or,

[0036] The thickness of the reflective layer is in the range of 80 nm to 120 nm; and / or,

[0037] The material of the reflective layer includes at least one of silver, aluminum, magnesium-silver alloy and magnesium-aluminum alloy.

[0038] In some embodiments, the light-emitting device includes an anode, a light-emitting layer, and a cathode, wherein the light-emitting layer is disposed between the anode and the cathode;

[0039] The material of the reflective layer is the same as that of the anode, or the material of the reflective layer is the same as that of the cathode.

[0040] According to a second aspect of the embodiments of the present application, a display device is provided, including:

[0041] The display panel as described in the first aspect.

[0042] The display panel and display device provided in the embodiments of the present application are provided with a photochromic structure. The orthographic projection of the photochromic structure on the substrate layer falls within the orthographic projection of the pixel-defining structure on the substrate layer. The photochromic structure will not affect the emission of the light-emitting device at the normal viewing angle of the display panel before and after the color change. The photochromic structure is used to darken the color when the amount of light absorbed reaches a critical point. The darkened photochromic structure can absorb more light. When the display panel is in an outdoor environment with strong light, the photochromic structure can reach the critical point of light absorption more quickly, and the color will quickly darken, thereby absorbing more light. The photochromic structure can absorb more ambient light outside the display panel, preventing more ambient light from entering the display panel, and can further reduce the reflective effect of the reflective structure entering the display panel, thereby reducing the reflection effect of external ambient light in the display panel, and further reducing the amount of reflected light emitted from the display panel. Therefore, the display panel provided in the embodiment of the present application can improve the display contrast and visibility of the display panel in an environment with strong external light without changing the power consumption of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic partial cross-sectional structural diagram of a display panel provided in an embodiment of the present application;

[0044] Figure 2 A schematic partial top view of a display panel provided in an embodiment of the present application;

[0045] Figure 3 A schematic partial top view of another display panel provided in an embodiment of the present application;

[0046] Figure 4 A schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application;

[0047] Figure 5 A schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application;

[0048] Figure 6 A schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application;

[0049] Figure 7 A schematic partial cross-sectional structural diagram of a display panel provided in an embodiment of the present application;

[0050] Figure 8 A schematic diagram of a partial cross-sectional structure of a pixel defining structure provided in an embodiment of the present application;

[0051] Figure 9 A schematic diagram of a partial cross-sectional structure of another pixel defining structure provided in an embodiment of the present application;

[0052] Figure 10 A schematic diagram of a partial cross-sectional structure of another pixel defining structure provided in an embodiment of the present application;

[0053] Figure 11 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0055] In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or equipment comprising the elements. The term "two or more" includes two or more than two cases.

[0056] At present, with the rapid development of display technology, the integration technology of touch function and other sensing functions of display devices is becoming more and more mature. In addition, the full-screen appearance with a high screen-to-body ratio is becoming more and more common. However, there are still some technical problems in the existing display technology that need to be broken through. In order to meet the needs of display driving, appearance optimization or other sensing functions, the electrodes or traces in the display panel need to use conductive materials with reflective effects, such as metals or alloys. The ambient light outside the display panel will be reflected by the conductive materials with reflective effects. When the user uses the display device outdoors with strong light, the reflection of sunlight in the outdoor environment on the conductive materials with reflective effects is more serious, which makes the contrast and visibility of the display device in the outdoor environment low.

[0057] In view of this, embodiments of the present application provide a display panel and a display device, which can improve the contrast and visibility of the display device when used in an outdoor environment with strong light.

[0058] In a first aspect of an embodiment of the present application, a display panel is provided. Figure 1 This is a schematic partial cross-sectional structural diagram of a display panel provided in an embodiment of the present application. Figure 1As shown, the display panel provided by an embodiment of the present application includes: a substrate layer 100 and a photochromic structure 400. Multiple light-emitting devices 200 are disposed on one side of the substrate layer 100, and a pixel-defining structure 300 is disposed between adjacent light-emitting devices 200. The photochromic structure 400 is disposed on the side of the light-emitting devices 200 away from the substrate layer 100, and the orthographic projection of the photochromic structure 400 on the substrate layer 100 falls within the orthographic projection of the pixel-defining structure 300 on the substrate layer 100. The photochromic structure 400 is configured to darken in color when the amount of light absorbed reaches a critical point. The light emitted by the light-emitting devices 200 can be used to display images on the display panel. The light-emitting devices 200 can emit light of different colors, achieving a color display on the display panel. The pixel-defining structure 300 can be used to space the light-emitting devices 200 so that each light-emitting device 200 serves as a sub-pixel. Light-emitting devices 200 emitting light of different colors can form a pixel unit of the display panel. When the amount of light absorbed by the photochromic structure 400 reaches a critical point, the color of the photochromic structure 400 darkens. The darkened photochromic structure 400 can absorb more light. When the display panel is in an outdoor environment with strong light, the photochromic structure 400 can reach the critical point of light absorption more quickly, and the color will quickly darken, thereby absorbing more light. The photochromic structure 400 can absorb more ambient light outside the display panel, preventing more ambient light from entering the display panel. This can further reduce the reflective effect of the reflective structure inside the display panel, thereby reducing the reflection effect of external ambient light within the display panel, thereby reducing the amount of reflected light emitted from the display panel, and improving the display contrast and visibility of the display panel in an environment with strong external light.

[0059] It should be noted that Figure 1 The shape of the light-emitting device 200 and the shape and number of the photochromic structure 400 are merely illustrative and are not intended to be a specific limitation of the embodiments of the present application.

[0060] It should be noted that the light-emitting device 200 provided in the embodiment of the present application is not limited to OLED (Organic Light-Emitting Diode), and can also be other active light-emitting devices or passive light-emitting devices, and the embodiment of the present application does not make specific limitations.

[0061] It should be noted that the color of the photochromic structure 400 before the color deepens can be white or other lighter colors. Before the color deepens, it has good light transmittance and will not affect the emission of light from the normal display screen. The critical point of the amount of light absorbed by the photochromic structure 400 varies depending on the type of material. For example, the critical point can be set to the temperature critical point after the photochromic material absorbs light, for example, the material produces different temperature change effects when the amount of light absorbed is different. The critical point can also be that the photochromic material changes color as the material structure changes with the change of the absorbed light flux. This is only for illustration and is not a specific limitation of the embodiments of the present application.

[0062] It should be noted that the display panel is usually provided with electrodes, circuits or other structures with reflective effects. When the external ambient light is strong, the structure with reflective effect inside the display panel will reflect the external ambient light again to the display side of the display panel. The reflected light of the ambient light and the light of the display screen of the display panel are both emitted from the display side of the display panel. The reflected light of the ambient light interferes with the light of the display screen, which will reduce the contrast of the display screen. In a brighter environment, the stronger the reflected light, the insufficient brightness of the display screen, resulting in a low visibility effect of the display panel, making it difficult for users to clearly see the picture information displayed on the display panel.

[0063] In response to the above-mentioned problems, the display panel provided in the embodiment of the present application is provided with a photochromic structure 400. The orthographic projection of the photochromic structure 400 on the substrate layer 100 falls within the orthographic projection of the pixel defining structure 300 on the substrate layer 100. Therefore, the photochromic structure 400 will not affect the emission of the light-emitting device 200 at the normal viewing angle of the display panel before and after the color change. The photochromic structure 400 is used to darken the color when the amount of light absorbed reaches a critical point. The darkened photochromic structure 400 can absorb more light. When the display panel is in an outdoor environment with strong light, the photochromic structure 400 can reach the critical point of light absorption more quickly, and then the color will quickly darken, thereby absorbing more light. The photochromic structure 400 can absorb more ambient light outside the display panel, preventing more ambient light from entering the display panel, and can further reduce the reflective effect of the reflective structure entering the display panel, thereby reducing the reflection effect of external ambient light in the display panel, and further reducing the amount of reflected light emitted from the display panel. Therefore, the display panel provided in the embodiment of the present application can improve the display contrast and visibility of the display panel in an environment with strong external light without changing the power consumption of the display panel.

[0064] In some embodiments, the photochromic structure 400 can be configured to change color to black when the amount of light absorbed reaches a critical point. The black photochromic structure 400 absorbs more ambient light and also absorbs ambient light reflected from the reflective structure within the display panel, further reducing the amount of ambient light reflected from the display panel, thereby improving display contrast and visibility in strong outdoor environments.

[0065] In some embodiments, the orthographic projection of the photochromic structure 400 on the substrate layer 100 surrounds the orthographic projection of the light-emitting device 200 on the substrate layer 100. It should be noted that the surrounding in this embodiment can be full surrounding or partial surrounding, and the photochromic structure 400 can be a continuous closed loop structure or a disconnected structure, which is not specifically limited in this embodiment of the application.

[0066] For example, Figure 2 This is a schematic partial top view of a display panel provided in an embodiment of the present application. Figure 2 As shown, each light emitting device 200 is surrounded by a photochromic structure 400. Figure 2 Each light emitting device 200 is shown surrounded by two circles of photochromic structures 400 .

[0067] For example, Figure 3 This is a schematic partial top view of another display panel provided in an embodiment of the present application. Figure 3 As shown, each light emitting device 200 is surrounded by a circle of photochromic structures 400 .

[0068] It should be noted that Figure 2 and Figure 3 The shape, size and arrangement of the light-emitting device 200 shown are merely illustrative and are not intended to be a specific limitation of the embodiments of the present application. The shapes and sizes of light-emitting devices emitting light of different colors may also vary. Figure 2 and Figure 3 The shape, size, and arrangement of the photochromic structure 400 shown are merely illustrative and are not intended to be a specific limitation of the embodiments of the present application.

[0069] In some embodiments, Figure 4 This is a schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application. Figure 4As shown, the display panel provided in the embodiment of the present application may further include: an encapsulation layer 500, a polarizer 600, a touch layer 700, an optical adhesive layer 800, and a cover plate 900. The encapsulation layer 500 is disposed on the side of the light-emitting device 200 away from the substrate layer 100. The encapsulation layer 500 covers the light-emitting device 200 and can protect the light-emitting device 200 from being corroded by water and oxygen. The encapsulation layer 500 may include an organic encapsulation layer and an inorganic encapsulation layer. The polarizer 600 is disposed on the side of the encapsulation layer 500 away from the light-emitting device 200. The polarizer 600 can filter light. The touch layer 700 is disposed on the side of the encapsulation layer 500 away from the light-emitting device 200. The touch layer 700 may include at least one layer of touch electrodes. The touch electrodes may be used to sense the capacitance change caused by the user touching the surface of the display panel, so as to analyze and confirm the coordinates of the position touched by the user, thereby realizing the touch control display function. The optical adhesive layer 800 is disposed on the side of the encapsulation layer 500 away from the light-emitting device 200. The cover plate 900 is disposed on the side of the optical adhesive layer 800 away from the encapsulation layer 500. The optical adhesive layer 800 can be used to bond the cover plate 900, which can protect the various film layers in the display panel.

[0070] In some embodiments, the photochromic structure 400 may be disposed on a side of the encapsulation layer 500 away from the light-emitting device 500 .

[0071] In some embodiments, as Figure 4 As shown, the photochromic structure 400 may be disposed on a side of the polarizer 600 away from the encapsulation layer 500 .

[0072] In some embodiments, the photochromic structure 400 may be disposed on a side of the touch layer 700 away from the encapsulation layer 500 .

[0073] In some embodiments, the photochromic structure 400 may be disposed on a side of the optical adhesive layer 800 away from the encapsulation layer 500 .

[0074] The display panel provided in the embodiment of the present application can be set on different film layers according to specific process capabilities or production energy efficiency designs.

[0075] In some embodiments, the pixel defining structure 300 includes at least two convex portions and at least one concave portion, wherein the concave portion is disposed between adjacent convex portions, and a reflective layer is disposed on a surface of the convex portion.

[0076] For example, Figure 5 This is a schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application. Figure 5As shown, the pixel defining structure 300 between adjacent light-emitting devices 200 includes two convex portions 310 and a concave portion 320. The concave portion 320 is arranged between adjacent convex portions 310, and a reflective layer 301 is arranged on the surface of the convex portion 310. The reflective layer 301 can reflect the light emitted by the light-emitting device 200 again, which can increase the amount of light emitted at the normal viewing angle of the display panel, thereby improving the display visibility and contrast of the display panel at the normal viewing angle. The setting of the convex portion 310 and the concave portion 320 is to set the existing pixel defining structure 300 as an uneven structure. On the basis of playing the role of spacing the light-emitting devices 200, the reflective layer 301 arranged on the surface of the uneven structure can also be used to reflect the external ambient light incident at the normal viewing angle into reflected light emitted at the side viewing angle, or absorbed by the photochromic structure 400 after reflection. You can refer to Figure 5 The light path indicated by the arrows can reduce the emission amount of reflected light of the external ambient light at a normal viewing angle, further improving the display contrast and visibility of the display panel at a normal viewing angle.

[0077] In some embodiments, reference Figure 4 The width of the end of the protrusion 310 away from the substrate layer 100 is smaller than the width of the end of the protrusion 310 close to the substrate layer 100, so that the reflective layer 301 on the side surface of the protrusion 310 is oblique, which is more conducive to the reflection of the oblique light emitted by the light-emitting device 200, and reflects the oblique light into light emitted at a normal viewing angle, thereby improving the display visibility and contrast of the display panel at a normal viewing angle.

[0078] In some embodiments, reference Figure 5 The farthest end of the protrusion 310 away from the substrate layer 100 is lower than the surface of the light-emitting device 200 away from the substrate layer 100, or the farthest end of the protrusion 310 away from the substrate layer 100 is coplanar with the surface of the light-emitting device 200 away from the substrate layer 100. In other words, it can be understood that the end surface of the protrusion 310 does not extend beyond the end surface of the light-emitting device 200.

[0079] In some embodiments, Figure 6 This is a schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application. Figure 6As shown, the pixel defining structure 300 further includes a base layer 330, and the protrusion 310 and the recess 320 are arranged on the side of the base layer 330 away from the substrate layer 100; the farthest end of the protrusion 310 away from the substrate layer 100 exceeds the surface of the light-emitting device 200 on the side away from the substrate layer. The end face of the protrusion 310 exceeds the end face of the light-emitting device 200, which can reflect more of the side-viewing angle light emitted from the light-emitting device 200 and emit it from the front-viewing angle, thereby increasing the amount of light emitted from the front-viewing angle of the display panel and improving the front-viewing angle contrast and visibility of the lower display panel. It can also reflect more of the ambient light incident at the front-viewing angle as side-viewing angle light or absorb it. Figure 6 The middle arrows indicate the reflected light path of the light emitted by the light emitting device 200 and the reflected light path of the light incident from the external ambient light at a normal angle.

[0080] It should be noted that the setting of the protrusion 310 can also play a role in blocking the organic common layer. The organic common layer can be the electron transport layer, hole transport layer, electron injection layer or hole transport layer of the light-emitting device 200, which can reduce crosstalk between adjacent light-emitting devices.

[0081] In some embodiments, as Figure 1 and Figure 4 As shown, the cross-sectional shape of the photochromic structure 400 is a rectangle in the direction perpendicular to the shape extension direction of the photochromic structure 400. For example, the cross-sectional shape of the photochromic structure 400 is a rectangle in the direction perpendicular to the shape extension direction of the photochromic structure 400. Figure 2 BB indicated in the figure.

[0082] In some embodiments, reference Figure 6 The cross-section of the photochromic structure 400 is trapezoidal in a direction perpendicular to its extension, with the lower base of the trapezoid close to the substrate layer 100 and the upper base of the trapezoid away from the substrate layer 100. The extension direction of the photochromic structure 400 is parallel to the plane of the substrate layer 100. This trapezoidal structure better aligns the light reflection path, increasing the amount of display light emitted at normal viewing angles while reducing the amount of reflected light from ambient light at normal viewing angles, thereby improving the visibility and contrast of the display panel at normal viewing angles.

[0083] For example, the material of the photochromic structure 400 may include one or more of transition metal oxides, rare earth-doped calcium fluoride, methyl viologen, azobenzene, diarylethenes, and spirofurans.

[0084] In some embodiments, reference Figure 5 and Figure 6The orthographic projection of the photochromic structure 400 on the substrate layer 100 falls within the orthographic projection of the protrusion 310 on the substrate layer 100. The photochromic structure 400 absorbs ambient light incident at a normal angle. Ambient light incident at a normal angle that strikes the concave portion 320 is reflected from the side of the protrusion 310, changing the light's propagation path. The top of the protrusion 310 is typically flat, so the top of the photochromic structure 400 blocks the ambient light, preventing it from being specularly reflected and then re-emitted at a normal angle, allowing it to be directly absorbed by the photochromic structure 400.

[0085] In some embodiments, reference Figure 6 When the cross-sectional shape of the protrusion 310 perpendicular to the shape extension direction of the protrusion 310 is a trapezoid, the orthographic projection of the photochromic structure 400 on the substrate layer 100 covers the orthographic projection of the upper base of the trapezoid on the substrate layer 100, and the shape extension direction of the protrusion 310 is parallel to the plane where the substrate layer 100 is located; the upper base of the trapezoid is the short side of the parallel variable, and the lower base is the long side of the parallel variable.

[0086] In some embodiments, Figure 7 This is a schematic partial cross-sectional structural diagram of a display panel provided in an embodiment of the present application. Figure 7 As shown, when the cross-sectional shape of the protrusion 310 perpendicular to the direction in which the protrusion extends is triangular, the orthographic projection of the photochromic structure 400 on the substrate layer overlaps the orthographic projection of the end of the triangle away from the substrate layer 100 on the substrate layer 100. This means that the protrusion 310 needs to be positioned directly opposite the photochromic structure 400 to achieve a more ideal light path change.

[0087] In some embodiments, reference Figure 6 and Figure 7 The convex portion 310 corresponds to the photochromic structure 400 one by one, which can better improve the contrast and visibility at a normal viewing angle.

[0088] Exemplary, reference Figure 7 The number of convex portions 310 between adjacent light-emitting devices 200 may be , the more convex portions 310 there are, the more reflective surfaces of the pixel defining structure 300 there are, the more changes there are in the reflected light path of the external ambient light, and the better the effect of improving the light path.

[0089] In some embodiments, Figure 8 This is a schematic diagram of a partial cross-sectional structure of a pixel definition structure provided in an embodiment of the present application. Figure 8As shown, the base layer 330 is made of the same material as the convex portion 310, and the refractive index of the pixel-defining structure is smaller than that of the reflective layer, so that the incident condition of the external ambient light is dense light and sparse light, and total reflection occurs at the interface between the reflective layer and the pixel-defining structure, and the external ambient light incident at a normal viewing angle can be completely reflected as light at a non-normal viewing angle, thereby changing the light path and reducing the reflection of the external ambient light at a normal viewing angle.

[0090] In some embodiments, Figure 9 This is a schematic diagram of a partial cross-sectional structure of another pixel definition structure provided in an embodiment of the present application. Figure 9 As shown, the base layer 330 and the convex portion 310 are made of different materials, and the refractive index of the reflective layer 301 is greater than the refractive index of the convex portion 310, so that the incident condition of the external ambient light is dense light and sparse light, then total reflection occurs at the interface between the reflective layer and the pixel defining structure, and the external ambient light incident at a normal viewing angle can be completely reflected into light at a non-normal viewing angle, thereby changing the light path and reducing the reflection of the external ambient light at a normal viewing angle.

[0091] In some embodiments, Figure 10 This is a schematic diagram of a partial cross-sectional structure of another pixel definition structure provided in an embodiment of the present application. Figure 10 As shown, an auxiliary reflective layer 302 is provided between the pixel defining structure 300 and the reflective layer 301. The refractive index of the auxiliary reflective layer 302 is smaller than that of the reflective layer 301, so that the incident condition of the external ambient light is that the light is dense and the light is sparse, then total reflection occurs at the interface between the reflective layer and the pixel defining structure, and the external ambient light incident at a normal viewing angle can be completely reflected into light at a non-normal viewing angle, thereby changing the optical path and reducing the reflection of the external ambient light at a normal viewing angle.

[0092] Exemplarily, the thickness of the reflective layer 301 ranges from 80 nm to 120 nm. The material of the reflective layer 301 may include at least one of silver, aluminum, a magnesium-silver alloy, and a magnesium-aluminum alloy. The magnesium-silver alloy may have a ratio of magnesium to silver between 1:9 and 2:8. The reflective layer 301 may also be a stack of multiple metal layers.

[0093] In some embodiments, reference Figure 5 The light-emitting device 200 may include an anode 201, a light-emitting layer 202 and a cathode 203, and the light-emitting layer 202 is arranged between the anode 201 and the cathode 203; the material of the reflective layer 301 is the same as that of the anode 201, so in the production process of the display panel, the preparation of the reflective layer 301 can share the equipment and process parameters with the preparation of the anode 201, and there is no need to re-debug the equipment and prepare materials.

[0094] In some embodiments, the material of the reflective layer 301 is the same as that of the cathode 203. In the production process of the display panel, the reflective layer 301 can be prepared using the same equipment and process parameters as those used to prepare the cathode 203, without the need to re-adjust equipment and prepare materials.

[0095] According to a second aspect of the present application, a display device is provided. Figure 11 This is a schematic structural diagram of a display device provided in an embodiment of the present application. Figure 11 As shown, the display device provided in the embodiment of the present application includes: the display panel 1000 as described in the first aspect.

[0096] It should be noted that the display device provided in the embodiment of the present application can be a smart phone, tablet computer, laptop computer, television, car dashboard, device display control panel or other display, etc., and the embodiment of the present application does not make specific limitations.

[0097] In the display device provided in the embodiment of the present application, a photochromic structure is provided on the display panel. The orthographic projection of the photochromic structure on the substrate layer falls within the orthographic projection of the pixel-defining structure on the substrate layer. The photochromic structure does not affect the emission of the light-emitting device at the normal viewing angle of the display panel before and after the color change. The photochromic structure is used to darken the color when the amount of light absorbed reaches a critical point. The darkened photochromic structure can absorb more light. When the display panel is in an outdoor environment with strong light, the photochromic structure can reach the critical point of light absorption more quickly, and the color will quickly darken, thereby absorbing more light. The photochromic structure can absorb more ambient light outside the display panel, preventing more ambient light from entering the display panel, and can further reduce the reflective effect of the reflective structure entering the display panel, thereby reducing the reflection effect of external ambient light in the display panel, and further reducing the amount of reflected light emitted from the display panel. Therefore, the display panel provided in the embodiment of the present application can improve the display contrast and visibility of the display panel in an environment with strong external light without changing the power consumption of the display panel.

[0098] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0099] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0100] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0101] Obviously, those skilled in the art may make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if such changes and modifications fall within the scope of the claims of this specification and their equivalents, this specification is intended to include such changes and modifications.

Claims

1. A display panel, characterized in that: include: A substrate layer, wherein a plurality of light-emitting devices are disposed on one side of the substrate layer, and a pixel defining structure is disposed between adjacent light-emitting devices; a photochromic structure, disposed on a side of the light-emitting device away from the substrate layer, wherein an orthographic projection of the photochromic structure on the substrate layer falls within an orthographic projection of the pixel-defining structure on the substrate layer; The photochromic structure is used to darken its color when the amount of light absorbed reaches a critical point; The pixel definition structure between adjacent light-emitting devices includes at least two convex portions and at least one concave portion, and the concave portion is provided between adjacent convex portions; A reflective layer is provided on the surface of the convex portion; The refractive index of the pixel defining structure is less than the refractive index of the reflective layer; The orthographic projection of the photochromic structure on the substrate layer falls within the orthographic projection of the protrusion on the substrate layer.

2. The display panel according to claim 1, wherein: The photochromic structure is used to change color to black when the amount of light absorbed reaches a critical point.

3. The display panel according to claim 1, wherein: Also includes: an encapsulation layer, disposed on a side of the light-emitting device away from the substrate layer, the encapsulation layer covering the light-emitting device; The photochromic structure is arranged on a side of the encapsulation layer away from the light-emitting device.

4. The display panel according to claim 1, wherein: Also includes: an encapsulation layer, disposed on a side of the light-emitting device away from the substrate layer, the encapsulation layer covering the light-emitting device; a polarizer, disposed on a side of the encapsulation layer away from the light-emitting device; The photochromic structure is arranged on a side of the polarizer away from the encapsulation layer; and / or, an optical adhesive layer, disposed on a side of the encapsulation layer away from the light-emitting device; The photochromic structure is arranged on a side of the optical adhesive layer away from the encapsulation layer; and / or, A touch layer is provided on a side of the encapsulation layer away from the light-emitting device; The photochromic structure is disposed on a side of the touch layer away from the encapsulation layer.

5. The display panel according to claim 1, wherein: The orthographic projection of the photochromic structure on the substrate layer surrounds the orthographic projection of the light-emitting device on the substrate layer; and / or, In a direction perpendicular to the shape extension of the photochromic structure, the cross-sectional shape of the photochromic structure is a trapezoid, the lower base of the trapezoid is close to the substrate layer, the upper base of the trapezoid is away from the substrate layer, and the shape extension direction of the photochromic structure is parallel to the plane where the substrate layer is located; and / or, The material of the photochromic structure includes one or more of transition metal oxides, rare earth-doped calcium fluoride, methyl viologen, azobenzene, diarylethenes and spirofurans.

6. The display panel according to claim 1, wherein: The width of the protrusion at an end away from the substrate layer is smaller than the width of the protrusion at an end close to the substrate layer.

7. The display panel according to claim 1, wherein: The farthest end of the protrusion away from the substrate layer is lower than the surface of the light emitting device away from the substrate layer, or the farthest end of the protrusion away from the substrate layer is coplanar with the surface of the light emitting device away from the substrate layer.

8. The display panel according to claim 1, wherein: The pixel defining structure includes a base layer, and the convex portion and the concave portion are arranged on a side of the base layer away from the substrate layer; The farthest end of the protrusion away from the substrate layer exceeds the surface of the light emitting device away from the substrate layer.

9. The display panel according to claim 1, wherein: When the cross-sectional shape of the protrusion perpendicular to the extension direction of the protrusion is a trapezoid, the orthographic projection of the photochromic structure on the substrate layer covers the orthographic projection of the upper base of the trapezoid on the substrate layer, and the extension direction of the protrusion is parallel to the plane of the substrate layer; When the cross-sectional shape of the convex portion perpendicular to the extension direction of the convex portion is triangular, the orthographic projection of the photochromic structure on the substrate layer covers the orthographic projection of the end of the triangle away from the substrate layer on the substrate layer.

10. The display panel according to claim 1, wherein The convex portions correspond to the photochromic structures one by one.

11. The display panel according to claim 1, wherein The refractive index of the reflective layer is greater than the refractive index of the convex portion; and / or, An auxiliary reflective layer is provided between the pixel defining structure and the reflective layer, and the refractive index of the auxiliary reflective layer is smaller than the refractive index of the reflective layer; and / or, The thickness of the reflective layer is in the range of 80 nm to 120 nm; and / or, The material of the reflective layer includes at least one of silver, aluminum, magnesium-silver alloy and magnesium-aluminum alloy.

12. The display panel according to claim 1, wherein The light emitting device comprises an anode, a light emitting layer and a cathode, wherein the light emitting layer is arranged between the anode and the cathode; The material of the reflective layer is the same as that of the anode, or the material of the reflective layer is the same as that of the cathode.

13. A display device, characterized in that: include: The display panel according to any one of claims 1 to 12.

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