CN115132806A

CN115132806A - Display panel and display device

Info

Publication number: CN115132806A
Application number: CN202210751154.9A
Authority: CN
Inventors: 葛玉德; 李世泰; 李慧; 朱修剑
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd; Hefei Visionox Technology Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd; Hefei Visionox Technology Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-09-30

Abstract

The application provides a display panel and a display device, comprising a pixel limiting layer, wherein the pixel limiting layer comprises a first pixel limiting layer and a second pixel limiting layer which are arranged in a stacked mode, and the first pixel limiting layer is positioned on one side, close to the light emitting side of the display panel, of the second pixel limiting layer; the refractive index of the first pixel defining layer is smaller than the refractive index of the second pixel defining layer. After the ambient light enters the second pixel limiting layer, total reflection is easy to occur at the interface between the first pixel limiting layer and the second pixel limiting layer, so that light emitted out of the display panel from the second pixel limiting layer can be reduced, reflection of the display panel to the ambient light is reduced, and the display effect of the display panel and the display device is improved. Therefore, the display panel and the display device provided by the application can improve the reflection of the ambient light in the display panel and the display device.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display panels, in particular to a display panel and a display device.

Background

Organic Light-Emitting diodes (OLEDs), OLEDs have features such as active Light emission, high contrast, ultra-Light and thin, low temperature resistance, fast response speed, low power consumption, wide viewing angle, and strong shock resistance, and thus are increasingly used.

In the related art, the display panel includes an array substrate and a filter layer on the array substrate, the filter layer includes a color filter and a light shielding layer surrounding the color filter, the color filter can be used to filter light with a color different from its own color in ambient light, and the light shielding layer can be formed of a material capable of blocking light and can absorb light irradiated onto the light shielding layer.

However, the reflection of ambient light in the above display panel still needs to be improved.

Disclosure of Invention

In view of at least one of the above technical problems, 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.

In order to achieve the above object, the embodiments of the present application provide the following technical solutions:

a first aspect of the embodiments of the present application provides a display panel, including a pixel defining layer, where the pixel defining layer includes a first pixel defining layer and a second pixel defining layer that are stacked, and the first pixel defining layer is located on a side of the second pixel defining layer close to a light emitting side of the display panel; the refractive index of the first pixel defining layer is smaller than the refractive index of the second pixel defining layer.

The display panel provided by the embodiment of the 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 one 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 smaller than that of the second pixel defining layer. When ambient light impinges on a structural layer (e.g., an anode) in the display panel, it may be reflected to the pixel defining layer and then enter the pixel defining layer. Because the refractive index of the first pixel limiting layer is smaller than that of the second pixel limiting layer, after light enters the second pixel limiting layer, total reflection is easy to occur at the interface between the first pixel limiting layer and the second pixel limiting layer, so that the light emitted out of the display panel from the second pixel limiting layer can be reduced, the reflection of the display panel to ambient light is reduced, and the display effect of the display panel and the display device is improved.

In one possible implementation, the pixel defining layer further includes a third pixel defining layer, the third pixel defining layer being located on a 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 smaller than that of the second pixel defining layer.

Therefore, when light enters the second pixel limiting layer, total reflection is easy to occur at the interface between the first pixel limiting layer and the second pixel limiting layer, the light can irradiate to the backlight side of the display panel, the light emitted out of the display panel from the second pixel limiting layer is reduced, reflection of the display panel to ambient light is reduced, and the display effect of the display panel and the display device is improved.

In one possible embodiment, the thickness of the second pixel defining layer is not less than 1 μm;

and/or the thickness of the pixel defining layer ranges from greater than or equal to 1.5 μm to less than or equal to 3 μm.

Therefore, the preparation difficulty of the pixel limiting layer can be reduced, and the influence on the thickness of the display panel can be reduced.

In one possible embodiment, the refractive index of the first pixel defining layer and/or the third pixel defining layer ranges from greater than or equal to 1.4 to less than or equal to 1.7; it may be achieved that the refractive indices of the first pixel defining layer and the third pixel defining layer are equal;

and/or the second pixel defining layer has a refractive index in a range greater than 1.7 and less than or equal to 1.85.

In one possible embodiment, the pixel defining layer has a plurality of pixel openings arranged at intervals therein, and between two adjacent pixel openings, the second pixel defining layer includes edge portions adjoining the pixel openings and a middle portion located between the edge portions, the edge portions having a thickness greater than that of the middle portion.

In this way, the second pixel defining layer between two adjacent pixel openings is thin in the middle and thick at two sides, so that the area of the side surface of the second pixel defining layer is larger, more light rays can enter the total reflection channel through the side surface, and the reflection of ambient light in the display panel is better reduced.

In one possible embodiment, the thickness of the second pixel defining layer gradually increases from the middle portion to the edge portion;

it may be achieved that the surface of the second pixel defining layer facing away from and/or towards the light exit side of the display panel is a curved surface.

Therefore, all parts on the cambered surface are stressed uniformly, and the stress on the first surface and the second surface can be reduced.

In one possible embodiment, the side surfaces of the second pixel defining layer are multiplexed as the side surfaces of the pixel defining layer.

In this way, the second pixel defining layer side surface can be made larger, and more light can enter the total reflection channel through the side surface, so as to better reduce the reflection of the ambient light in the display panel.

In one possible embodiment, the thickness of the second pixel defining layer is equal everywhere along the extending direction of the display panel.

Thus, the difficulty in manufacturing the second pixel defining layer can be reduced.

A second aspect of embodiments of the present application provides a display device including the display panel in the first aspect.

The display device provided by the embodiment of the application can comprise a display panel, the display panel can comprise a pixel defining layer, the pixel defining layer can comprise a first pixel defining layer and a second pixel defining layer which are arranged in a stacked mode, the first pixel defining layer is positioned on one side, close to the light outlet side of the display panel, of the second pixel defining layer, and the refractive index of the first pixel defining layer is smaller than that of the second pixel defining layer. When ambient light impinges on a structural layer (e.g., an anode) in the display panel, it may be reflected to the pixel defining layer and then enter the pixel defining layer. Because the refractive index of the first pixel limiting layer is smaller than that of the second pixel limiting layer, after light enters the second pixel limiting layer, total reflection is easy to occur at the interface between the first pixel limiting layer and the second pixel limiting layer, so that the light emitted out of the display panel from the second pixel limiting layer can be reduced, the reflection of the display panel to ambient light is reduced, and the display effect of the display panel and the display device is improved.

The construction of the present application and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a top view of a display panel provided in an embodiment of the present application;

fig. 2 is a cross-sectional view of a display panel provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 4 is another schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a pixel defining layer according to an embodiment of the present disclosure;

fig. 6 is another schematic structural diagram of a pixel defining layer according to an embodiment of the present disclosure.

Description of reference numerals:

100-a display panel; 100 a-display area;

100 b-non-display area; 100 c-a light emitting region;

100 d-non-light emitting area; 110-an array substrate;

120-a light emitting layer; 121-anode layer;

122-a pixel layer; 130-a pixel defining layer;

131-a first pixel defining layer; 132-a second pixel defining layer;

133-a third pixel defining layer; 134-pixel openings;

141-a first surface; 142-a second surface;

143-a first side surface; 144-total reflection channel;

150-an encapsulation layer; 160-a filter layer;

161-color resistance; 162-a light-shielding layer;

171-edge portion; 172-middle portion.

Detailed Description

In the related art, the display panel may include a light emitting region and a non-light emitting region adjacent to the light emitting region. The display panel comprises an array substrate and a filter layer positioned on the array substrate, wherein the filter layer comprises a color resistor and a shading layer, the color resistor is positioned in a light emitting area, and the shading layer is positioned in a non-light emitting area. The filter layer is provided with an opening, the opening penetrates through the filter layer along the thickness direction, and the color resistor is accommodated in the opening; the non-opening area in the filter layer forms a light shielding layer.

A light emitting layer is arranged between the array substrate and the filter layer, and the light emitting layer comprises a plurality of pixels arranged at intervals and a pixel limiting layer positioned between adjacent pixels. Light emitted by the pixels exits the display panel through the color resists to achieve display.

However, the color resists can transmit light with the same color as the color of the ambient light, and when the ambient light irradiates a structural layer (e.g., an anode layer) in the display panel through the color resists, the ambient light can be reflected to the pixel defining layer, and then is refracted by the pixel defining layer, and irradiates the color resists to exit the display panel, so that the reflection of the display panel to the ambient light is still high, and the display effect of the display panel and the display device is affected.

In view of at least one of the above technical problems, embodiments of the present application provide a display panel and a display device, where 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 that are stacked, the first pixel defining layer is located on a side of the second pixel defining layer close to a light emitting side of the display panel, and a refractive index of the first pixel defining layer is smaller than a refractive index of the second pixel defining layer. When ambient light impinges on a structural layer (e.g., an anode layer) in the display panel, it may be reflected to the pixel defining layer and then enter the pixel defining layer. Because the refractive index of the first pixel limiting layer is smaller than that of the second pixel limiting layer, after light enters the second pixel limiting layer, total reflection is easy to occur at the interface between the first pixel limiting layer and the second pixel limiting layer, so that the light emitted out of the display panel from the second pixel limiting layer can be reduced, the reflection of the display panel to ambient light is reduced, and the display effect of the display panel and the display device is improved.

In order to make the objects, 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 drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The display device provided in the embodiment of the present application will be described below with reference to fig. 1 to 6.

The present embodiment provides a display device including a display panel 100. The display device may be a mobile or fixed terminal having the display panel 100, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, an intelligent bracelet, an intelligent watch, a super personal computer, and a navigator.

The display panel 100 may be an organic light-emitting diode (OLED) display panel, a micro LED (micro LED or μ LED) display panel, a Liquid Crystal Display (LCD) display panel, or the like.

In the embodiment of the present application, the display panel 100 is taken as an OLED display panel for example.

The following describes the display panel 100 according to an embodiment of the present application.

The present embodiment provides a display panel 100, and the display panel 100 can be applied to the display device in the above embodiments.

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

As shown in fig. 1 and 2, the display panel 100 may include an array substrate 110, and a light emitting layer 120 on the array substrate 110. The array substrate 110 has a plurality of driving units disposed therein, the plurality of driving units may be arranged in an array, and the driving units are electrically connected to the light-emitting layer 120, and the driving units are configured to provide a driving current for the light-emitting layer 120. The driving unit may include a Thin Film Transistor (TFT) and a capacitor structure. For example, the thin film transistor may include at least one of a Metal Oxide (MO) thin film transistor and a Low Temperature Polysilicon (LTPS) thin film transistor.

The following is a description of the light-emitting layer 120 provided in the examples of the present application.

As shown in fig. 2, the light emitting layer 120 may include an anode layer 121 and a cathode layer, and the anode layer 121 is located on a 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.

The light emitting layer 120 may further include a pixel layer 122 and a pixel defining layer 130, the pixel layer 122 being formed of a light emitting material, the pixel layer 122 and the pixel defining layer 130 being positioned between the anode layer 121 and the cathode layer. The pixel layer 122 may generally include a plurality of pixels arranged at intervals, the plurality of pixels may be arranged in an array, and the plurality of pixels may include, but is not limited to, a red pixel, a green pixel, and a blue pixel. In other examples, the plurality of pixels may also include a white pixel. At least some of the adjacent pixels may be different in color.

The pixel defining layer 130 has a plurality of pixel openings 134 spaced apart from each other, 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 two adjacent pixels, for example, the pixel defining layer 130 may be disposed around the periphery of the pixels.

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.

It is understood that, as shown in fig. 1, the display panel 100 may include a display area 100a and a non-display area 100b, the display area 100a being used to display a screen, and the non-display area 100b and the display area 100a may be disposed adjacent to each other. The non-display area 100b is located at least one side of the display area 100 a. For example, the non-display area 100b may be surrounded on the outer circumference of the display area 100 a.

As shown in fig. 2, the display area 100a may include an emitting area 100c and a non-emitting area 100d, the emitting area 100c corresponds to a pixel, the pixel is located in the emitting area 100c, for example, the emitting area 100c and the pixel may be overlapped; in addition, a non-light emitting region 100d is disposed between the adjacent light emitting regions 100c, the non-light emitting region 100d may be disposed around the periphery of the light emitting region 100c, and the non-light emitting region 100d may correspond to at least a portion of the pixel defining layer 130.

As shown in fig. 2, the display panel 100 may further include an encapsulation layer 150, the encapsulation layer 150 is located on a side of the light emitting layer 120 away from the array substrate 110, and the encapsulation 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 to damage the display panel 100. For example, the Encapsulation layer 150 may use Thin Film Encapsulation (TFE).

A side of the encapsulation layer 150 facing away from the array substrate 110 may be provided with the filter layer 160, a touch layer may be provided between the filter layer 160 and the encapsulation layer 150, or the filter layer 160 may be at least partially integrated in the touch layer to reduce the thickness of the display panel 100. The touch layer is used for realizing a touch function.

In this embodiment, the filter layer 160 may include the light shielding layer 162, the light shielding layer 162 may be formed of a material capable of shielding light, the light shielding layer 162 may have a relatively dark color (e.g., black), and the light shielding layer 162 may be capable of absorbing light irradiated onto the light shielding layer 162. The filter layer 160 has an opening therein, the light-shielding layer 162 is not disposed in the opening, and the opening is at least partially located in the light-emitting region 100c, i.e., the opening may overlap the light-emitting region 100c or the opening may extend from the light-emitting region 100c to the non-light-emitting region 100 d. The light shielding layer 162 may reduce reflection of ambient light by the display panel 100. The light-shielding layer 162 is located in the non-light-emitting region 100d, so that the influence on the aperture ratio of the display panel 100 can be avoided. The light-shielding layer 162 may cover a part or all of the non-light-emitting region 100 d.

The filter layer 160 may further include a color resist 161, the color resist 161 being located in an opening of the filter layer 160, and the color resist 161 may be used to filter light of a color different from its own color in the ambient light. The color resistor 161 may be made of an organic material, which has high flexibility and is beneficial to the bending performance of the display panel 100. At least a portion of the color resistor 161 may be located in the light emitting region 100 c.

The color resistor 161 may include a plurality of sub-color resistors, the sub-color resistors are arranged in a one-to-one correspondence with the pixels, and the orthographic projection of the sub-color resistors on the light emitting layer 120 covers the pixels and has the same color as the covered pixels, so as to avoid the occurrence of light mixing. The plurality of sub-color resistances may include any one or more of a red sub-color resistance, a green sub-color resistance, a blue sub-color resistance, and a white sub-color resistance. For example, the sub-color resistor corresponding to the red pixel is a red sub-color resistor, which 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 resistor is larger than or equal to the size of the pixel, and the orthographic projection of the sub-color resistor on the light-emitting layer 120 can cover the pixel.

The pixel defining layer 130 provided in the embodiment of the present application is explained below.

As shown in fig. 3, the pixel defining layer 130 may include a first pixel defining layer 131 and a second pixel defining layer 132 which are stacked, and the first pixel defining layer 131 is located at a side of the second pixel defining layer 132 close to the light emitting side of the display panel 100. The refractive index of the first pixel defining layer 131 is smaller than that of the second pixel defining layer 132, and when ambient light is irradiated onto the anode layer 121, it may 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 smaller than that of the second pixel defining layer 132, when light enters the second pixel defining layer 132, total reflection easily occurs at an interface between the first pixel defining layer 131 and the second pixel defining layer 132, the light may be emitted to the backlight side of the display panel 100 and irradiated onto the driving unit of the display panel 100, the driving unit includes more metal layers (the metal layers may be reflective), so that the light irradiated onto the driving unit is reflected and then enters the second pixel defining layer 132 again, thereby forming a reflective 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.

Specifically, the 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 the first sub-color resistor and the second sub-color resistor, and the colors of the first sub-color resistor and the second sub-color resistor may be different. When light enters the adjacent second pixel defining layer 132 from the first pixel opening, the light enters the reflective channel, and enters the second pixel opening after multiple reflections (including total reflection) occur in the reflective channel, and the light exits from the second pixel opening. Because the color of the first sub-color resistance corresponding to the first pixel opening is different from the color of the second sub-color resistance corresponding to the second pixel opening, the light irradiated to the first pixel opening through the first sub-color resistance cannot pass through the second sub-color resistance, so that the light emitted from the second pixel defining layer 132 to the outside of the display panel 100 is reduced, the reflection of the display panel 100 to the ambient light is reduced, and the display effect of the display panel 100 and the display device is improved.

It should be noted that, a part of the ambient light may directly irradiate onto the pixel defining layer 130 and enter the pixel defining layer 130, and the pixel defining layer 130 in the embodiment of the present application may also improve the reflection of the part of the ambient light in the display panel 100.

In some embodiments, as shown in fig. 4 and 5, the pixel defining layer 130 may further include a third pixel defining layer 133, where the third pixel defining layer 133 is located on a 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 smaller than that of the second pixel defining layer 132, so that when light enters the second pixel defining layer 132, total reflection easily occurs at the interface between the first pixel defining layer 131 and the second pixel defining layer 132, and also total reflection easily occurs at the interface between the third pixel defining layer 133 and the second pixel defining layer 132, thereby forming a total reflection path 144 between the two oppositely disposed surfaces of the second pixel defining layer 132 in the thickness direction.

Arrows g1 and g2 in fig. 4 show schematic diagrams of propagation of part of the ambient light in the pixel defining layer 130. Specifically, the 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 the first sub-color resistor and the second sub-color resistor, and the colors of the first sub-color resistor and the second sub-color resistor may be different. When light enters the adjacent second pixel defining layer 132 from the first pixel opening, the light enters the total reflection channel 144, and after multiple total reflections occur in the total reflection channel 144, the light enters the second pixel opening, and the light is emitted from the second pixel opening. Because the color of the first sub-color resistance corresponding to the first pixel opening is different from the color of the second sub-color resistance corresponding to the second pixel opening, the light irradiated to the first pixel opening through the first sub-color resistance cannot pass through the second sub-color resistance, and cannot be emitted out of the display panel 100, so that the reflection of ambient light in the display panel 100 can be reduced, and the display effect of the display panel 100 and the display device can be improved.

For example, the thickness range of the pixel defining layer 130 may be 1.5 μm to 3 μm, so that the thickness of the pixel defining layer 130 may be prevented from being too small, and the difficulty in manufacturing the first pixel defining layer 131, the second pixel defining layer 132, and other structural layers may be reduced; it is also possible to prevent the thickness of the pixel defining layer 130 from being excessively large, reducing the influence on the thickness of the display panel 100. For example, the thickness of the pixel defining layer 130 may be any thickness between 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 1.5 μm-3 μm.

Illustratively, the thickness of the second pixel defining layer 132 may be greater than or equal to 1 μm. Therefore, the situation that the thickness of the second pixel limiting layer 132 is too small can be avoided, and the situation that light cannot well irradiate the second pixel limiting layer 132 and the reflection of ambient light is improved a little; it is also possible to avoid an excessive thickness of the second pixel defining layer 132, reducing the influence 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, or the like.

Illustratively, 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 1.4-1.7. 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. Wherein the refractive indexes of the first pixel defining layer 131 and the third pixel defining layer 133 may not be equal. Of course, the refractive indexes 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 may be made of the same material, and the manufacturing process is simple. In addition, the refractive index of the second pixel defining layer 132 may range from greater than 1.7 to 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.

The second pixel defining layer 132 provided in the embodiment of the present application is explained below.

As shown in fig. 5 and 6, two surfaces of the second pixel defining layer 132 in the thickness direction include a first surface 141 and a second surface 142, a total reflection path 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 path 144 includes a path opening near the pixel opening 134, and the light enters the total reflection path 144 through the path opening (i.e., the first side surface 143).

As shown in fig. 3, between two adjacent pixel openings 134, the second pixel defining layer 132 includes edge portions 171 adjacent to the pixel openings 134 and a middle portion 172 between the edge portions 171, and the thickness of the edge portions 171 may be greater than that of the middle portion 172.

As shown in fig. 3 and 6, between two adjacent pixel openings 134, the edge portion 171 has a thickness d2, and the middle portion 172 has a thickness d1, where d2 is greater than d 1. In the direction from the middle portion 172 to the edge portion 171, the second pixel defining layer 132 has a shape that the middle is thin and the two sides are thick, so that the area of 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, so as to better reduce the reflection of the ambient light in the display panel 100. For example, the thickness of the second pixel defining layer 132 gradually increases 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, no abrupt angle change occurs on 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 can easily 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 reduced well.

The thickness of a portion of the second pixel defining layer 132 is: the distance between the first plane on which the portion on the first surface 141 is located and the second plane on which the portion on the second surface 142 is located, and the first plane and the second plane are both parallel to the plane on which the display panel 100 is located.

As shown in fig. 6, the first side surface 143 of the second pixel defining layer 132 is multiplexed as the side surface of the pixel defining layer 130, and at this time, the thickness (thickness d2 in fig. 6) of the second pixel defining layer 132 on the side close to the pixel opening 134 is equal to the thickness of the pixel defining layer 130. By 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, so as to better reduce the reflection of the ambient light in the display panel 100.

At least one of the first surface 141 and the second surface 142 of the second pixel defining layer 132 may be a curved surface, and the stress is uniformly applied to each of the curved surfaces, so that the stress on the first surface 141 and the second surface 142 may be further reduced.

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

It should be noted that the numerical values and numerical ranges related to the embodiments of the present application are approximate values, and there may be a certain range of errors depending on the manufacturing process, and the error may be considered as negligible by those skilled in the art.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel is characterized by comprising a pixel defining layer, wherein the pixel defining layer comprises a first pixel defining layer and a second pixel defining layer which are arranged in a stacked mode, and the first pixel defining layer is positioned on one side, close to the light emitting side of the display panel, of the second pixel defining layer;

the first pixel defining layer has a refractive index smaller than that of the second pixel defining layer.

2. The display panel of claim 1, wherein the pixel defining layer further comprises a third pixel defining layer on a side of the second pixel defining layer away from the light exit side of the display panel;

the refractive index of the third pixel defining layer is smaller than the refractive index of the second pixel defining layer.

3. The display panel according to claim 1 or 2, wherein a thickness of the second pixel defining layer is not less than 1 μm;

4. The display panel according to claim 2,

the first pixel defining layer and/or the third pixel defining layer have a refractive index in a range of 1.4 or more and 1.7 or less; preferably, the refractive indices of the first pixel defining layer and the third pixel defining layer are equal;

5. The display panel according to claim 1 or 2, wherein the pixel defining layer has a plurality of pixel openings arranged at intervals therein, and between two adjacent pixel openings, the second pixel defining layer includes edge portions adjoining the pixel openings and a middle portion located between the edge portions, and the thickness of the edge portions is greater than that of the middle portion.

6. The display panel according to claim 5, wherein a thickness of the second pixel defining layer gradually increases from the middle portion to the edge portion.

7. The display panel according to claim 5, wherein side surfaces of the second pixel defining layer are multiplexed as side surfaces of the pixel defining layer.

8. A display panel as claimed in claim 1 or 2 characterized in that the thickness of the second pixel defining layer is equal everywhere along the extension direction of the display panel.

9. A display panel as claimed in claim 1 or 2 characterized in that the face of the second pixel defining layer facing away from and/or towards the light exit side of the display panel is a curved face.

10. A display device comprising the display panel according to any one of claims 1 to 9.