Display panel and display device

Abstract

The present application provides a display panel and a display device, including a pixel defining layer. The pixel defining layer includes a first pixel defining layer and a second pixel defining layer which are stacked. The first pixel defining layer is located on the side of the second pixel defining layer closer to the light-emitting side of the display panel; the refractive index of the first pixel defining layer is less than that of the second pixel defining layer. When ambient light enters the second pixel defining layer, total internal reflection easily occurs at the interface between the first pixel defining layer and the second pixel defining layer, so that the light emitted from the second pixel defining layer to the outside of the display panel can be reduced, thereby reducing the reflection of the ambient light by the display panel and improving the display effect of the display panel and the display device. Therefore, the display panel and the display device provided by the present application can improve the reflection of the ambient light in the display panel and the display device.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED for short), OLED has the characteristics of active light emission, high contrast ratio, ultra-thin and light, low temperature resistance, fast response speed, low power consumption, wide viewing angle, strong earthquake resistance, etc., and thus has been more and more widely used.

[0003] In the related art, a display panel includes an array substrate and a light filtering layer located on the array substrate. The light filtering layer includes color resistors and a light shielding layer surrounding the outer periphery of the color resistors. Among them, the color resistors can be used to filter light in the ambient light that is different from their own colors, and the light shielding layer can be formed of a material that can block light and can absorb the light irradiated on the light shielding layer.

[0004] However, the reflection of ambient light in the above display panel still needs to be improved. Summary of the Invention

[0005] In view of the above at least one technical problem, embodiments of the present application provide a display panel and a display device, which can improve the reflection of ambient light in the display panel and the display device.

[0006] To achieve the above object, embodiments of the present application provide the following technical solutions:

[0007] A first aspect of embodiments of the present application provides a display panel, including a pixel defining layer. The pixel defining layer includes a first pixel defining layer and a second pixel defining layer which are stacked. The first pixel defining layer is located on the side of the second pixel defining layer close to the light-emitting side of the display panel; the refractive index of the first pixel defining layer is less than that of the second pixel defining layer.

[0008] For the display panel provided by embodiments of the present application, the display panel may include a pixel defining layer. The pixel defining layer may include a first pixel defining layer and a second pixel defining layer which are stacked. The first pixel defining layer is located on the side of the second pixel defining layer close to the light-emitting side of the display panel, and the refractive index of the first pixel defining layer is less than that of the second pixel defining layer. When ambient light irradiates on a structural layer (such as an anode) in the display panel, it can be reflected to the pixel defining layer and then enter the pixel defining layer. Since the refractive index of the first pixel defining layer is less than that of the second pixel defining layer, when light enters the second pixel defining layer, total internal reflection is likely to occur at the interface between the first pixel defining layer and the second pixel defining layer, so that the light emitted from the second pixel defining layer to the outside of the display panel can be reduced, thereby reducing the reflection of ambient light by the display panel and improving the display effect of the display panel and the display device.

[0009] In a possible implementation, the pixel defining layer further includes a third pixel defining layer, and the third pixel defining layer is located on a side of the second pixel defining layer away from the light-emitting side of the display panel;

[0010] The refractive index of the third pixel defining layer is less than that of the second pixel defining layer.

[0011] In this way, when light enters the second pixel defining layer, total internal reflection easily occurs at the interface between the first pixel defining layer and the second pixel defining layer, and the light will be directed towards the backlight side of the display panel, thereby reducing the light emitted from the second pixel defining layer to the outside of the display panel, so as to reduce the reflection of the display panel to ambient light, and thus improve the display effect of the display panel and the display device.

[0012] In a possible implementation, the thickness of the second pixel defining layer is not less than 1 μm;

[0013] And / or, the thickness range of the pixel defining layer is greater than or equal to 1.5 μm and less than or equal to 3 μm.

[0014] In this way, the manufacturing difficulty of the pixel defining layer can be reduced, and the influence on the thickness of the display panel can also be reduced.

[0015] In a possible implementation, the refractive index range of the first pixel defining layer and / or the third pixel defining layer is greater than or equal to 1.4 and less than or equal to 1.7; it can be achieved that the refractive indices of the first pixel defining layer and the third pixel defining layer are equal;

[0016] And / or, the refractive index range of the second pixel defining layer is greater than 1.7 and less than or equal to 1.85.

[0017] In a possible implementation, the pixel defining layer has a plurality of pixel openings arranged at intervals. Between two adjacent pixel openings, the second pixel defining layer includes an edge portion adjacent to the pixel opening and an intermediate portion located between the edge portions, and the thickness of the edge portion is greater than that of the intermediate portion.

[0018] In this way, the second pixel defining layer between two adjacent pixel openings has a shape that is thinner in the middle and thicker on both sides, so that the side surface area of the second pixel defining layer can be larger, and more light can enter the total internal reflection channel through the side surface, so as to better reduce the reflection of ambient light in the display panel.

[0019] In a possible implementation, the thickness of the second pixel defining layer gradually increases in the direction from the intermediate portion to the edge portion;

[0020] It can be achieved that the surface of the second pixel defining layer facing away from and / or towards the light-emitting side of the display panel is a curved surface.

[0021] In this way, the forces on various parts of the arc surface are relatively uniform, thereby reducing the stress on the first surface and the second surface.

[0022] In a possible implementation manner, the side surface of the second pixel defining layer is reused as the side surface of the pixel defining layer.

[0023] In this way, it is equivalent to setting the side surface of the second pixel defining layer to be as large as the side surface of the pixel defining layer, which can make the side surface of the second pixel defining layer larger, and more light can enter the total reflection channel through the side surface, so as to better reduce the reflection of ambient light in the display panel.

[0024] In a possible implementation manner, along the extending direction of the display panel, the thickness of the second pixel defining layer is equal everywhere.

[0025] In this way, the manufacturing difficulty of the second pixel defining layer can be reduced.

[0026] The second aspect of the embodiments of the present application provides a display device, including the display panel in the above first aspect.

[0027] For the display device provided by the embodiments of the present application, the display device may include a display panel, the display panel may include a pixel defining layer, the pixel defining layer may include a first pixel defining layer and a second pixel defining layer which are stacked, the first pixel defining layer is located on the side of the second pixel defining layer close to the light-emitting side of the display panel, and the refractive index of the first pixel defining layer is less than that of the second pixel defining layer. When ambient light irradiates the structural layer (such as the anode) in the display panel, it can be reflected to the pixel defining layer and then enter the pixel defining layer. Since the refractive index of the first pixel defining layer is less than that of the second pixel defining layer, when light enters the second pixel defining layer, total reflection is likely to occur at the interface between the first pixel defining layer and the second pixel defining layer, thereby reducing the light emitted from the second pixel defining layer to the outside of the display panel, reducing the reflection of the display panel to ambient light, and improving the display effect of the display panel and the display device.

[0028] The structure of the present application and its other invention objects and beneficial effects will become more obvious and understandable through the description of the preferred embodiments in conjunction with the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 Top view of the display panel provided by the embodiment of the present application;

[0031] Figure 2 Cross-sectional view of the display panel provided by the embodiment of the present application;

[0032] Figure 3 Structural schematic diagram of the display panel provided by the embodiment of the present application;

[0033] Figure 4 Another structural schematic diagram of the display panel provided by the embodiment of the present application;

[0034] Figure 5 Structural schematic diagram of the pixel defining layer provided by the embodiment of the present application;

[0035] Figure 6 Another structural schematic diagram of the pixel defining layer provided by the embodiment of the present application.

[0036] Explanation of reference numerals:

[0037] 100 - Display panel; 100a - Display area;

[0038] 100b - Non-display area; 100c - Light-emitting area;

[0039] 100d - Non-light-emitting area; 110 - Array substrate;

[0040] 120 - Light-emitting layer; 121 - Anode layer;

[0041] 122 - Pixel layer; 130 - Pixel defining layer;

[0042] 131 - First pixel defining layer; 132 - Second pixel defining layer;

[0043] 133 - Third pixel defining layer; 134 - Pixel opening;

[0044] 141 - First surface; 142 - Second surface;

[0045] 143 - First side surface; 144 - Total reflection channel;

[0046] 150 - Encapsulation layer; 160 - Filter layer;

[0047] 161 - Color resist; 162 - Light-shielding layer;

[0048] 171 - Edge part; 172 - Middle part. Detailed implementation manners

[0049] In the related art, a display panel may include a light-emitting region and a non-light-emitting region adjacent to the light-emitting region. The display panel includes an array substrate and a filter layer located on the array substrate. The filter layer includes color resistors and a light-shielding layer, where the color resistors are located in the light-emitting region and the light-shielding layer is located in the non-light-emitting region. There are openings in the filter layer, and the openings penetrate the filter layer in the thickness direction. The color resistors are accommodated in the openings; the non-opening regions in the filter layer form the light-shielding layer.

[0050] A light-emitting layer is disposed between the array substrate and the filter layer. The light-emitting layer includes a plurality of pixels arranged at intervals and a pixel defining layer located between adjacent pixels. The light emitted by the pixels is emitted from the display panel through the color resistors to achieve display.

[0051] However, the color resistors can transmit light in the ambient light that is the same as their own color. When the ambient light irradiates the structural layer (for example, the anode layer) in the display panel through the color resistors, it can be reflected to the pixel defining layer, and then refracted through the pixel defining layer and irradiated onto the color resistors and then emitted from the display panel, resulting in a relatively high reflection of the display panel to the ambient light, thereby affecting the display effects of the display panel and the display device.

[0052] Based on at least one of the above technical problems, embodiments of the present application provide a display panel and a display device. The display panel may include a pixel defining layer. The pixel defining layer may include a first pixel defining layer and a second pixel defining layer arranged in a stacked manner. The first pixel defining layer is located on the side of the second pixel defining layer closer to the light-emitting side of the display panel, and the refractive index of the first pixel defining layer is less than that of the second pixel defining layer. When the ambient light irradiates the structural layer (for example, the anode layer) in the display panel, it can be reflected to the pixel defining layer and then enter the pixel defining layer. Since the refractive index of the first pixel defining layer is less than that of the second pixel defining layer, when the light enters the second pixel defining layer, total internal reflection is likely to occur at the interface between the first pixel defining layer and the second pixel defining layer, thereby reducing the light emitted from the second pixel defining layer to the outside of the display panel, so as to reduce the reflection of the display panel to the ambient light, thereby improving the display effects of the display panel and the display device.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0054] The following will be combined with Figures 1 - 6 to describe the display device provided by the embodiments of the present application.

[0055] This embodiment provides a display device, which includes a display panel 100. The display device can be a mobile or fixed terminal with a display panel 100, such as an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a smart bracelet, a smart watch, a super personal computer, a navigator, etc.

[0056] The display panel 100 can be an Organic Light-Emitting Diode (OLED) display panel, a Micro Light Emitting Diode (MicroLED or μLED) display panel, or a Liquid Crystal Display (LCD) display panel, etc.

[0057] In this embodiment of the application, the display panel 100 is taken as an OLED display panel as an example for illustration.

[0058] The following describes the display panel 100 provided in this embodiment of the application.

[0059] This embodiment provides a display panel 100, which can be applied to the display device in the above embodiment.

[0060] The display panel 100 can include a light-emitting side and a backlight side that are oppositely arranged in the thickness direction. The light-emitting side is the side for displaying the picture, and the backlight side is the other side that is arranged opposite to the light-emitting side along the thickness direction of the display panel 100.

[0061] As Figure 1 and Figure 2 shown, the display panel 100 can include an array substrate 110 and a light-emitting layer 120 located on the array substrate 110. A plurality of driving units are arranged in the array substrate 110. The plurality of driving units can be arranged in an array, and the driving units are electrically connected to the light-emitting layer 120. The driving units are used to provide driving current for the light-emitting layer 120. The driving units can include a Thin Film Transistor (TFT) and a capacitive structure. For example, the thin film transistor can include at least one of a Metal Oxide (MO) thin film transistor and a Low Temperature Poly-silicon (LTPS) thin film transistor.

[0062] The following describes the light-emitting layer 120 provided in this embodiment of the application.

[0063] As Figure 2As shown, the light-emitting layer 120 may include an anode layer 121 and a cathode layer. The anode layer 121 is located on the side of the cathode layer facing the array substrate 110. The anode layer 121 may be a pixel electrode, and the cathode layer may be a common electrode.

[0064] The light-emitting layer 120 may further include a pixel layer 122 and a pixel defining layer 130. The pixel layer 122 is formed of a light-emitting material. The pixel layer 122 and the pixel defining layer 130 are located between the anode layer 121 and the cathode layer. The pixel layer 122 generally may include a plurality of pixels arranged at intervals. The plurality of pixels may be arranged in an array. The plurality of pixels may include, but are not limited to, red pixels, green pixels, and blue pixels. In some other examples, the plurality of pixels may further include white pixels. At least some adjacent two pixels may have different colors.

[0065] The pixel defining layer 130 has a plurality of pixel openings 134 arranged at intervals, and the pixels may be located in the pixel openings 134 in a one-to-one correspondence. The pixel defining layer 130 is located between adjacent two pixels. For example, the pixel defining layer 130 may be disposed around the periphery of the pixels.

[0066] Among them, the light-emitting layer 120 may further include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer.

[0067] It can be understood that, as Figure 1 shown, the display panel 100 may include a display area 100a and a non-display area 100b. The display area 100a is used for displaying images. The non-display area 100b and the display area 100a may be adjacent to each other. The non-display area 100b is located on at least one side of the display area 100a. For example, the non-display area 100b may surround the outer periphery of the display area 100a.

[0068] As Figure 2 shown, the display area 100a may include a light-emitting area 100c and a non-light-emitting area 100d. The light-emitting area 100c corresponds to the pixels, and the pixels are located within the light-emitting area 100c. For example, the light-emitting area 100c may coincide with the pixels. In addition, a non-light-emitting area 100d is provided between adjacent light-emitting areas 100c. The non-light-emitting area 100d may be disposed around the outer periphery of the light-emitting area 100c, and the non-light-emitting area 100d may correspond to at least a part of the pixel defining layer 130.

[0069] As Figure 2As shown, the display panel 100 may further include a packaging layer 150. The packaging layer 150 is located on the side of the light-emitting layer 120 facing away from the array substrate 110. The packaging layer 150 is used to seal the light-emitting layer 120 to prevent external water and oxygen from penetrating into the light-emitting layer 120 and the driving unit, thereby damaging the display panel 100. For example, the packaging layer 150 may adopt the thin film encapsulation technology (abbreviated as TFE).

[0070] A light filtering layer 160 may be provided on the side of the packaging layer 150 facing away from the array substrate 110. A touch control layer may be provided between the light filtering layer 160 and the packaging layer 150, or at least part of the light filtering layer 160 may be integrated in the touch control layer to reduce the thickness of the display panel 100. Among them, the touch control layer is used to implement the touch control function.

[0071] In this embodiment, the light filtering layer 160 may include a light shielding layer 162. The light shielding layer 162 may be formed of a material capable of blocking light. The light shielding layer 162 may have a relatively dark color (for example, black). The light shielding layer 162 can absorb the light irradiated on the light shielding layer 162. There are openings in the light filtering layer 160, and the light shielding layer 162 is not provided in the openings. The openings are at least partially located in the light-emitting area 100c, that is, the openings may overlap with the light-emitting area 100c or the openings may extend from the light-emitting area 100c to the non-light-emitting area 100d. The light shielding layer 162 can reduce the reflection of the display panel 100 to ambient light. The light shielding layer 162 is located in the non-light-emitting area 100d, so as to avoid affecting the aperture ratio of the display panel 100. Among them, the light shielding layer 162 may cover part or all of the non-light-emitting area 100d.

[0072] The light filtering layer 160 may further include color filters 161. The color filters 161 are located in the openings of the light filtering layer 160. The color filters 161 can be used to filter light in the ambient light that is different from their own colors. The color filters 161 may be formed of organic materials, and have relatively high flexibility, which is beneficial to the bending performance of the display panel 100. At least part of the color filters 161 may be located in the light-emitting area 100c.

[0073] The color filters 161 may include a plurality of sub-color filters. The sub-color filters are arranged in one-to-one correspondence with the pixels. The orthographic projection of the sub-color filters on the light-emitting layer 120 covers the pixels and has the same color as the covered pixels to avoid color mixing. The plurality of sub-color filters may include any one or more of a red sub-color filter, a green sub-color filter, a blue sub-color filter, and a white sub-color filter. For example, the sub-color filter corresponding to the red pixel is a red sub-color filter. The red sub-color filter can block the light emitted by the blue pixel and the green pixel and allow the red light emitted by the red pixel or the white pixel to pass through. The size of the sub-color filter is greater than or equal to the size of the pixel, and the orthographic projection of the sub-color filter on the light-emitting layer 120 can cover the pixel.

[0074] The pixel defining layer 130 provided by the embodiments of the present application will be described below.

[0075] As Figure 3 shown, the pixel defining layer 130 may include a first pixel defining layer 131 and a second pixel defining layer 132 which are stacked. The first pixel defining layer 131 is located on the side of the second pixel defining layer 132 closer to the light-emitting side of the display panel 100. The refractive index of the first pixel defining layer 131 is less than that of the second pixel defining layer 132. When ambient light irradiates the anode layer 121, it can be reflected to the pixel defining layer 130 and then enter the pixel defining layer 130. Since the refractive index of the first pixel defining layer 131 is less than that of the second pixel defining layer 132, when light enters the second pixel defining layer 132, total internal reflection easily occurs at the interface between the first pixel defining layer 131 and the second pixel defining layer 132, and the light will be directed towards the backlight side of the display panel 100 and irradiate the driving unit on the display panel 100. The driving unit includes a relatively large number of metal layers (the metal layers can reflect light), so that the light irradiated on the driving unit is reflected and then enters the second pixel defining layer 132 again, thereby forming a reflection channel between the surface of the second pixel defining layer 132 facing the first pixel defining layer 131 and the surface of the driving unit close to the second pixel defining layer 132.

[0076] Specifically, two adjacent pixel openings 134 may include a first pixel opening and a second pixel opening. The first pixel opening and the second pixel opening respectively correspond to a first sub-color filter and a second sub-color filter, and the colors of the first sub-color filter and the second sub-color filter may be different. When light enters the adjacent second pixel defining layer 132 from the first pixel opening, it will enter the reflection channel and be reflected multiple times (including total internal reflection) in the reflection channel and then enter the second pixel opening, and the light exits from the second pixel opening. Since the color of the first sub-color filter corresponding to the first pixel opening is different from the color of the second sub-color filter corresponding to the second pixel opening, the light irradiated to the first pixel opening through the first sub-color filter cannot pass through the second sub-color filter, thereby reducing the light emitted from the second pixel defining layer 132 to the outside of the display panel 100, reducing the reflection of the display panel 100 to ambient light, and thus improving the display effect of the display panel 100 and the display device.

[0077] It should be noted that part of the ambient light can directly irradiate the pixel defining layer 130 and enter the pixel defining layer 130. The pixel defining layer 130 in the embodiments of the present application can also improve the reflection of this part of the ambient light in the display panel 100.

[0078] In some embodiments, such as Figure 4 and Figure 5As shown, the pixel defining layer 130 may further include a third pixel defining layer 133. The third pixel defining layer 133 is located on the side of the second pixel defining layer 132 away from the light-emitting side of the display panel 100, that is, the second pixel defining layer 132 is located between the first pixel defining layer 131 and the third pixel defining layer 133. The refractive index of the third pixel defining layer 133 is less than that of the second pixel defining layer 132. In this way, when light enters the second pixel defining layer 132, total internal reflection is likely to occur at the interface between the first pixel defining layer 131 and the second pixel defining layer 132, and total internal reflection is also likely to occur at the interface between the third pixel defining layer 133 and the second pixel defining layer 132, thereby forming a total internal reflection channel 144 between two opposite surfaces of the second pixel defining layer 132 in the thickness direction.

[0079] Figure 4 The arrows g1 and g2 in Figure 4 show a schematic diagram of the propagation of part of the ambient light in the pixel defining layer 130. Specifically, two adjacent pixel openings 134 may include a first pixel opening and a second pixel opening. The first pixel opening and the second pixel opening respectively correspond to a first sub-color filter and a second sub-color filter, and the colors of the first sub-color filter and the second sub-color filter may be different. When light enters the adjacent second pixel defining layer 132 from the first pixel opening, it will enter the total internal reflection channel 144, and after multiple total internal reflections in the total internal reflection channel 144, it will enter the second pixel opening, and the light will exit from the second pixel opening. Since the color of the first sub-color filter corresponding to the first pixel opening is different from the color of the second sub-color filter corresponding to the second pixel opening, the light irradiated to the first pixel opening through the first sub-color filter cannot pass through the second sub-color filter, and thus cannot exit the display panel 100, thereby reducing the reflection of ambient light in the display panel 100 and improving the display effect of the display panel 100 and the display device.

[0080] Exemplarily, the thickness range of the pixel defining layer 130 may be 1.5 μm - 3 μm, which can avoid the thickness of the pixel defining layer 130 being too small, reducing the manufacturing difficulty of structural layers such as the first pixel defining layer 131 and the second pixel defining layer 132; it can also avoid the thickness of the pixel defining layer 130 being too large and reducing the impact on the thickness of the display panel 100. For example, the thickness of the pixel defining layer 130 may be 1.5 μm, 1.6 μm, 1.65 μm, 1.7 μm, 1.75 μm, 1.8 μm, 2.0 μm, 2.5 μm, 3.0 μm or any thickness between 1.5 μm - 3 μm.

[0081] Exemplarily, the thickness of the second pixel defining layer 132 may be greater than or equal to 1 μm. Thereby, it is possible to avoid the situation where the thickness of the second pixel defining layer 132 is too small, which may prevent light from irradiating well onto the second pixel defining layer 132 and result in a small improvement in the reflection of ambient light. It is also possible to avoid the situation where the thickness of the second pixel defining layer 132 is too large, thereby reducing the impact on the thickness of the display panel 100. For example, the thickness of the second pixel defining layer 132 may be 1 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, 1.5 μm, 1.6 μm, etc.

[0082] Exemplarily, the refractive index of the first pixel defining layer 131 may range from 1.4 to 1.7. For example, the refractive index of the first pixel defining layer 131 may be 1.4, 1.5, 1.6, 1.65, 1.7, or any value between 1.4 and 1.7. The refractive index of the third pixel defining layer 133 may range from 1.4 to 1.7. For example, the refractive index of the third pixel defining layer 133 may be 1.4, 1.5, 1.6, 1.65, 1.7, or any value between 1.4 and 1.7. Among them, the refractive indices of the first pixel defining layer 131 and the third pixel defining layer 133 may not be equal. Of course, the refractive indices of the first pixel defining layer 131 and the third pixel defining layer 133 may be equal, so that the first pixel defining layer 131 and the third pixel defining layer 133 can be prepared using the same material, and the preparation process is relatively simple. In addition, the refractive index of the second pixel defining layer 132 may range from greater than 1.7 and less than or equal to 1.85. For example, the refractive index of the second pixel defining layer 132 may be 1.75, 1.8, 1.85, or any value between greater than 1.7 and less than or equal to 1.85.

[0083] The following describes the second pixel defining layer 132 provided in the embodiments of the present application.

[0084] As Figure 5 and Figure 6 shown, the two surfaces of the second pixel defining layer 132 along the thickness direction include a first surface 141 and a second surface 142. A total reflection channel 144 is formed between the first surface 141 and the second surface 142, and the first surface 141 and the second surface 142 are connected by a first side surface 143. For example, the total reflection channel 144 includes a channel opening close to the pixel opening 134, and light enters the total reflection channel 144 through the channel opening (i.e., the first side surface 143).

[0085] As Figure 3 shown, between two adjacent pixel openings 134, the second pixel defining layer 132 includes an edge portion 171 adjacent to the pixel opening 134 and an intermediate portion 172 located between the edge portions 171. The thickness of the edge portion 171 may be greater than the thickness of the intermediate portion 172.

[0086] As Figure 3 and Figure 6 shown, between two adjacent pixel openings 134, the thickness of the edge portion 171 is d2, and the thickness of the middle portion 172 is d1, where d2 is greater than d1. Along the direction from the middle portion 172 to the edge portion 171, the second pixel defining layer 132 has a shape that is thinner in the middle and thicker on both sides, so that the area of the first side surface 143 of the second pixel defining layer 132 can be larger, and more light can enter the total reflection channel 144 through the first side surface 143 to better reduce the reflection of ambient light in the display panel 100. For example, the thickness of the second pixel defining layer 132 gradually increases along the direction from the middle portion 172 to the edge portion 171, so that the distance between the first surface 141 and the second surface 142 gradually changes, and there is no sudden change in angle on both the first surface 141 and the second surface 142, and the stress on the first surface 141 and the second surface 142 is small. In addition, light is more likely to pass through the total reflection channel 144 and irradiate from the adjacent first pixel opening to the second pixel opening, so that the reflection of ambient light in the display panel 100 can be better reduced.

[0087] Wherein, the thickness of a certain part of the second pixel defining layer 132 refers to the distance between the first plane where this part is located on the first surface 141 and the second plane where this part is located on the second surface 142, and both the first plane and the second plane are parallel to the plane where the display panel 100 is located.

[0088] As Figure 6 shown, the first side surface 143 of the second pixel defining layer 132 is reused as the side surface of the pixel defining layer 130. At this time, the thickness ( Figure 6 the thickness d2 in) of the second pixel defining layer 132 close to the pixel opening 134 is equal to the thickness of the pixel defining layer 130. Equivalent to setting the first side surface 143 of the second pixel defining layer 132 to be as large as the side surface of the pixel defining layer 130, the first side surface 143 of the second pixel defining layer 132 can be made larger, and more light can enter the total reflection channel 144 through the first side surface 143 to better reduce the reflection of ambient light in the display panel 100.

[0089] At least one of the first surface 141 and the second surface 142 of the second pixel defining layer 132 can be an arc surface, and the forces on each part of the arc surface are relatively uniform, so that the stress on the first surface 141 and the second surface 142 can be further reduced.

[0090] In some embodiments, in the extending direction of the display panel 100, the thickness of the second pixel defining layer 132 may be equal everywhere. Along the direction from the middle portion 172 to the edge portion 171, the thickness of the second pixel defining layer 132 is equal everywhere, so that the manufacturing process of the second pixel defining layer 132 is relatively simple. Wherein, the extending direction of the display panel 100 (i.e., the direction on the plane where the display panel 100 is located, for example, it may be the length direction of the display panel 100 or the width direction of the display panel 100).

[0091] It should be noted here that the numerical values and numerical ranges involved in the embodiments of the present application are approximate values. Affected by the manufacturing process, there may be a certain range of errors, and those skilled in the art can consider this part of the errors to be negligible.

[0092] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that, It includes a pixel defining layer, and the pixel defining layer includes a first pixel defining layer and a second pixel defining layer which are stacked, and the first pixel defining layer is located on the side of the second pixel defining layer closer to the light-emitting side of the display panel; The refractive index of the first pixel defining layer is less than that of the second pixel defining layer; The pixel defining layer further includes a third pixel defining layer, and the third pixel defining layer is located on the side of the second pixel defining layer away from the light-emitting side of the display panel; The refractive index of the third pixel defining layer is less than that of the second pixel defining layer; There are a plurality of pixel openings arranged at intervals in the pixel defining layer. Between two adjacent pixel openings, the second pixel defining layer includes an edge portion adjacent to the pixel opening and an intermediate portion located between the edge portions, and the thickness of the edge portion is greater than that of the intermediate portion; A total reflection channel is formed between two opposite surfaces of the second pixel defining layer in the thickness direction; The thickness range of the pixel defining layer is greater than or equal to 1.5 μm and less than or equal to 3 μm; wherein, the thickness of the second pixel defining layer is not less than 1 μm.

2. The display panel according to claim 1, wherein The refractive index range of the first pixel defining layer and / or the third pixel defining layer is greater than or equal to 1.4 and less than or equal to 1.7; And / or, the refractive index range of the second pixel defining layer is greater than 1.7 and less than or equal to 1.

85.

3. The display panel according to claim 2, wherein The refractive indices of the first pixel defining layer and the third pixel defining layer are equal.

4. The display panel according to claim 1, wherein The thickness of the second pixel defining layer gradually increases in the direction from the intermediate portion to the edge portion.

5. The display panel according to claim 1, wherein The side surface of the second pixel defining layer is reused as the side surface of the pixel defining layer.

6. The display panel according to claim 1, wherein The surface of the second pixel defining layer facing away from and / or facing the light-emitting side of the display panel is an arc surface.

7. A display device, characterized in that, It includes the display panel according to any one of claims 1-6 above.

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