Display panel and display device

Abstract

A display panel includes a display region and a light-transmitting region, the display region includes a first display region and a second display region, and the first display region and the light-transmitting region constitute a transparent display region; the display region includes: a display substrate (21) including a light-emitting region (A) and a non-light-emitting region (B) surrounding the light-emitting region (A); a low-refraction layer (22) arranged on the light-emitting side of the display substrate (21), the orthogonal projection of the low-refraction layer (22) on the display substrate (21) is located within the range of the non-light-emitting region (B); a high-refraction layer (23) arranged on the side of the low-refraction layer (22) away from the display substrate (21), the high-refraction layer (23) covers at least the light-emitting region (A) and the side of the low-refraction layer (22) facing the light-emitting region (A); wherein the refractive index (n2) of the high-refraction layer (23) is greater than the refractive index (n1) of the low-refraction layer (22), the side of the low-refraction layer (22) facing the light-emitting region (A) is in contact with the high-refraction layer (23) to form a total reflection interface (s), and the total reflection interface (s) is used for causing total reflection of display light emitted from the light-emitting region (A) and entering through the high-refraction layer (23).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a display panel and a display device. BACKGROUND

[0002] An organic light emitting diode (OLED) is an active light emitting display device, which has the advantages of self-emission, wide viewing angle, high contrast, low power consumption, wide color gamut, thinness, and the like.

[0003] With the continuous development of display technology, OLED technology is increasingly applied to transparent display. Transparent display is a technology that can display a picture and also allow the scene on the opposite side of the screen to be seen through. Transparent display technology can realize virtual reality / augmented reality (VR / AR) and under-screen camera display functions. SUMMARY

[0004] The present disclosure provides a display panel, comprising a display area and a light-transmitting area, the display area being used for displaying a picture, and the light-transmitting area being used for transmitting ambient light; wherein the display area comprises a first display area and a second display area, and the first display area and the light-transmitting area constitute a transparent display area; the display area comprises:

[0005] a display substrate, comprising a light-emitting area and a non-light-emitting area surrounding the light-emitting area;

[0006] a low-refraction layer arranged on the light-emitting side of the display substrate, a normal projection of the low-refraction layer on the display substrate being located within the range of the non-light-emitting area;

[0007] a high-refraction layer arranged on the side of the low-refraction layer away from the display substrate, the high-refraction layer covering at least the light-emitting area and the side of the low-refraction layer facing the light-emitting area;

[0008] wherein the refractive index of the high-refraction layer is greater than the refractive index of the low-refraction layer, the side of the low-refraction layer facing the light-emitting area and the high-refraction layer are in contact with each other to form a total reflection interface, and the total reflection interface is used for causing display light emitted from the light-emitting area and entering through the high-refraction layer to undergo total reflection.

[0009] In an optional implementation, the included angle between the total reflection interface and the plane where the display substrate is located is a first acute angle, and the opening of the first acute angle faces away from the light-emitting area.

[0010] In an optional implementation, the first acute angle is greater than or equal to 20° and less than or equal to 80°.

[0011] In an optional implementation, the total reflection interface includes a first total reflection interface located at the first display area, and a second total reflection interface located at the second display area; the light emitting area includes a first light emitting area located at the first display area, and a second light emitting area located at the second display area.

[0012] The first total reflection interface is configured to totally reflect the first display light emitted by the first light emitting area, and the first display light accounts for a first proportion in the display light emitted by the first light emitting area; the second total reflection interface is configured to totally reflect the second display light emitted by the second light emitting area, and the second display light accounts for a second proportion in the display light emitted by the second light emitting area; the absolute value of the difference between the first proportion and the second proportion is greater than or equal to 0, and less than or equal to 0.3.

[0013] In an optional implementation, in a plane in which the display substrate is located, the size of the first light emitting area is less than the size of the second light emitting area.

[0014] In an optional implementation, the low-refraction layer includes a first low-refraction layer located at the first display area, and a second low-refraction layer located at the second display area; in the normal direction of the display substrate, the thickness of the first low-refraction layer is less than the thickness of the second low-refraction layer.

[0015] In an optional implementation, the difference between the thickness of the second low-refraction layer and the thickness of the first low-refraction layer is greater than or equal to 0.5 microns, and less than or equal to 4 microns.

[0016] In an optional implementation, the critical angle of the first display light totally reflected on the first total reflection interface is greater than the critical angle of the second display light totally reflected on the second total reflection interface.

[0017] In an optional implementation, the low-refraction layer includes a first low-refraction layer located at the first display area, and a second low-refraction layer located at the second display area; the refractive index of the first low-refraction layer is greater than the refractive index of the second low-refraction layer.

[0018] In an optional implementation, the difference between the refractive index of the first low-refraction layer and the refractive index of the second low-refraction layer is greater than or equal to 0.05, and less than or equal to 0.2.

[0019] In an optional implementation, the high-refractive layer includes a first high-refractive layer located at the first display region, and a second high-refractive layer located at the second display region; the refractive index of the first high-refractive layer is less than the refractive index of the second high-refractive layer.

[0020] In an optional implementation, the difference between the refractive index of the second high-refractive layer and the refractive index of the first high-refractive layer is greater than or equal to 0.05 and less than or equal to 0.2.

[0021] In an optional implementation, the included angle between the first total reflection interface and the plane where the display substrate is located is a first included angle, the first included angle is an acute angle with the opening facing away from the first light-emitting region; the included angle between the second total reflection interface and the plane where the display substrate is located is a second included angle, the second included angle is an acute angle with the opening facing away from the second light-emitting region; the first included angle is greater than the second included angle.

[0022] In an optional implementation, the difference between the first included angle and the second included angle is greater than or equal to 10° and less than or equal to 30°.

[0023] In an optional implementation, the minimum distance between the orthographic projection of the first total reflection interface on the display substrate and the first light-emitting region is a first distance, the minimum distance between the orthographic projection of the second total reflection interface on the display substrate and the second light-emitting region is a second distance, and the first distance is greater than the second distance.

[0024] In an optional implementation, the difference between the first distance and the second distance is greater than or equal to 3 microns and less than or equal to 6 microns.

[0025] In an optional implementation, the orthographic projection of the low-refractive layer on the display substrate does not overlap with the second display region, and in the second display region, the high-refractive layer covers the light-emitting region and at least part of the non-light-emitting region.

[0026] In an optional implementation, the display panel further includes a flat layer disposed on the side of the high-refractive layer away from the display substrate, and the refractive index of the flat layer is less than the refractive index of the high-refractive layer.

[0027] The orthographic projection of the high-refractive layer on the display substrate covers the light-emitting region and the edge region of the non-light-emitting region close to the light-emitting region.

[0028] The high-refractive layer and the flat layer are in contact with each other to form a refractive interface, the included angle between the refractive interface and the plane where the display substrate is located is a second acute angle, and the opening of the second acute angle faces the light-emitting region.

[0029] In an optional implementation, the high-refraction layer includes a first high-refraction portion and a second high-refraction portion, and the orthographic projection of the first high-refraction portion and the second high-refraction portion on the display substrate covers the display area.

[0030] The orthographic projection of the first high-refraction portion on the display substrate covers the light-emitting area and an edge area of the non-light-emitting area close to the light-emitting area, and the surface of the first high-refraction portion away from the display substrate is higher or equal in height to the surface of the second high-refraction portion away from the display substrate.

[0031] The display device provided by the present disclosure includes the display panel of any one of the above.

[0032] The above description is only a summary of the technical solutions of the present disclosure. In order to enable one skilled in the art to better understand the technical means of the present disclosure, the content of the specification can be implemented, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more obvious and easy to understand, the specific embodiments of the present disclosure are described below. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor. It should be noted that the proportions in the drawings are only for illustration and do not represent the actual proportions.

[0034] Figure 1 The cross-sectional structure schematic diagram of a display panel in the related art is schematically shown;

[0035] Figure 2 The cross-sectional structure schematic diagram of a display panel provided by the present disclosure is schematically shown;

[0036] Figure 3 The cross-sectional structure schematic diagram of a first display panel provided by the present disclosure is schematically shown;

[0037] Figure 4 The first light path structure schematic diagram provided by the present disclosure is schematically shown;

[0038] Figure 5 The cross-sectional structure schematic diagram of a second display panel provided by the present disclosure is schematically shown;

[0039] Figure 6 The cross-sectional structure schematic diagram of a third display panel provided by the present disclosure is schematically shown;

[0040] Figure 7 a cross-sectional structure schematic diagram of a fourth display panel provided by the present disclosure is shown schematically;

[0041] Figure 8 a cross-sectional structure schematic diagram of a fifth display panel provided by the present disclosure is shown schematically;

[0042] Figure 9 a light path structure schematic diagram provided by the present disclosure is shown schematically;

[0043] Figure 10 a cross-sectional structure schematic diagram of a sixth display panel provided by the present disclosure is shown schematically;

[0044] Figure 11 a light path structure schematic diagram provided by the present disclosure is shown schematically;

[0045] Figure 12 a luminance decay simulation curve of the first display area and the second display area in the first display panel in each viewing angle direction is shown schematically;

[0046] Figure 13 several display simulation pictures of the display panel under oblique viewing angle are shown schematically;

[0047] Figure 14 a cross-sectional structure schematic diagram of a seventh display panel provided by the present disclosure is shown schematically;

[0048] Figure 15 a cross-sectional structure schematic diagram of an eighth display panel provided by the present disclosure is shown schematically;

[0049] Figure 16 a cross-sectional structure schematic diagram of a ninth display panel provided by the present disclosure is shown schematically;

[0050] Figure 17 a cross-sectional structure schematic diagram of a tenth display panel provided by the present disclosure is shown schematically. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present disclosure.

[0052] Since the transparent display area in the display panel has both display and transparent functions, the transparent display technology has always been the focus of industry research. In the related technology, due to the setting of the transparent area, the picture brightness of the transparent display area is low, or the power consumption is high when the picture brightness meets the demand.

[0053] The inventors found that, in a display panel, as shown in Figure 1 , display light is emitted from a high-refractive cover plate into low-refractive air, and when the incident angle of the display light on the interface between the cover plate and the air is greater than or equal to the critical angle of total reflection, total internal reflection occurs, resulting in low overall light emission efficiency.

[0054] To solve the problem of low picture brightness of the transparent display area or high power consumption when the picture brightness meets the demand, the present disclosure provides a display panel, which includes a display area and a light-transmitting area. The display area is used for displaying a picture, and the light-transmitting area is used for transmitting ambient light.

[0055] Referring to Figure 2 , a cross-sectional structure schematic diagram of the display panel provided by the present disclosure is schematically shown. As shown in Figure 2 , the display panel of the display area includes a display substrate 21, which includes a light-emitting area A and a non-light-emitting area B surrounding the light-emitting area A; a low-refractive layer 22 arranged on the light-emitting side of the display substrate 21, the orthographic projection of the low-refractive layer 22 on the display substrate 21 is located within the range of the non-light-emitting area B; and a high-refractive layer 23 arranged on the side of the low-refractive layer 22 away from the display substrate 21, the high-refractive layer 23 covers at least the light-emitting area A and the side of the low-refractive layer 22 facing the light-emitting area A.

[0056] The refractive index of the high-refractive layer 23 is greater than the refractive index of the low-refractive layer 22, and the side of the low-refractive layer 22 facing the light-emitting area A and the high-refractive layer 23 are in contact with each other to form a total reflection interface s, which is used for causing total reflection of display light emitted from the light-emitting area A and entering through the high-refractive layer 23.

[0057] As shown in Figure 2 , in the normal direction f of the display substrate 21, the low-refractive layer 22 includes a pair of oppositely arranged surfaces, i.e., a surface close to the display substrate 21 and a surface away from the display substrate 21. The side of the low-refractive layer 22 facing the light-emitting area A is connected to the pair of oppositely arranged surfaces.

[0058] As shown in Figure 2As shown, for the display light ray incident on the total reflection interface s, when the incident angle a is greater than or equal to the total reflection critical angle, the display light ray is totally reflected on the total reflection interface s, and the propagation direction of the display light ray after total reflection is close to the normal direction f of the display substrate 21, so that the incident angle of the display light ray incident on the cover plate and air interface can be reduced, the probability of total internal reflection of the display light ray on the cover plate and air interface can be reduced, and the light extraction efficiency can be improved.

[0059] wherein the total reflection critical angle is arcsin(n1 / n2), n1 is the refractive index of the low-refractive layer 22, and n2 is the refractive index of the high-refractive layer 23.

[0060] The display panel provided by the present disclosure forms a total reflection interface s by stacking the low-refractive layer 22 and the high-refractive layer 23 on the light-exit side of the display substrate 21. The total reflection interface s can deflect the display light ray originally emitted at an oblique viewing angle towards a normal viewing angle direction, reduce the probability of total internal reflection of the display light ray on the cover plate and air interface, improve the light extraction efficiency, especially the front light extraction efficiency, thereby improving the display brightness of the transparent display area and reducing power consumption.

[0061] Exemplarily, the number of the light-emitting areas A can be multiple, such as Figure 2 As shown, the multiple light-emitting areas A can include a red light-emitting area R, a green light-emitting area G, a blue light-emitting area B, and the like, and the present disclosure does not limit this.

[0062] The light-emitting area A can emit light by disposing a light-emitting device. The light-emitting device can be, for example, an OLED, a quantum dot light-emitting diode (QLED), a mini light-emitting diode (Mini LED), a micro light-emitting diode (Micro LED), and the like, and the present disclosure does not limit this.

[0063] In a specific implementation, the low-refractive layer 22 can be formed by a patterning process such as exposure development, coating, or inkjet printing. The high-refractive layer 23 can be formed by a patterning process such as exposure development, coating, or inkjet printing.

[0064] Exemplarily, the material of the high-refractive layer can include an organic material such as acrylic, and can also include an inorganic material such as zirconium oxide, and the present disclosure does not limit this.

[0065] Exemplarily, the material of the low-refractive layer can include an organic material such as acrylic, and can also include an inorganic material such as zirconium oxide, and the present disclosure does not limit this.

[0066] For the display light incident on the total internal reflection interface s (i.e. the display light originally emitted at an oblique angle), when the incident angle α is less than the critical angle of total internal reflection, the display light is refracted at the total internal reflection interface s and enters the low refractive layer 22, and is emitted out of the display panel along the oblique angle direction.

[0067] To further improve light extraction efficiency, optionally, the angle between the total reflection interface s and the plane where the display substrate 21 is located is a first acute angle θ, and the opening of the first acute angle θ faces away from the light-emitting area A.

[0068] By setting the angle between the total reflection interface s and the plane where the display substrate 21 is located to be an acute angle with the opening facing away from the light-emitting area A, more display light incident on the total reflection interface s can be totally reflected, increasing the proportion of total reflection of display light and reducing the proportion of refraction at the total reflection interface s, thereby further improving the light extraction efficiency, especially the front light extraction efficiency.

[0069] Optionally, the first acute angle θ is greater than or equal to 20° and less than or equal to 80°. Further, the first acute angle θ can be greater than or equal to 30° and less than or equal to 70°, and the first acute angle θ can also be greater than or equal to 40° and less than or equal to 70°.

[0070] Optionally, such as Figure 3 As shown, the display area may include a first display area and a second display area, and the first display area and the light-transmitting area ( Figure 3 (Not shown in the image) forms a transparent display area. A second display area at least partially surrounds the transparent display area.

[0071] To improve the light extraction efficiency of the entire display area, total internal reflection interfaces s can be set in the first and second display areas respectively. In one optional implementation, such as... Figure 3 As shown, the total reflection interface s includes a first total reflection interface s1 located in the first display area and a second total reflection interface s2 located in the second display area; the light emission area A includes a first light emission area A1 located in the first display area and a second light emission area A2 located in the second display area.

[0072] The first total internal reflection interface s1 is used to perform total internal reflection of the first display light emitted from the first light-emitting area A1, and the second total internal reflection interface s2 is used to perform total internal reflection of the second display light emitted from the second light-emitting area A2.

[0073] By setting total reflection interfaces s in the first display area and the second display area respectively, that is, setting a first total reflection interface s1 in the first display area and a second total reflection interface s2 in the second display area, the light emission efficiency of the entire display area, especially the front light emission efficiency, can be improved and the power consumption reduced.

[0074] The proportion of the first display light rays in the display light rays emitted from the first light-emitting area A1 is a first ratio. The proportion of the second display light rays in the display light rays emitted from the second light-emitting area A2 is a second ratio. Optionally, the absolute value of the difference between the first ratio and the second ratio is greater than or equal to 0 and less than or equal to 0.3.

[0075] When both the first and second display areas are equipped with total internal reflection interfaces s, the total internal reflection interfaces s can deflect the display light rays that were originally emitted at an oblique viewing angle to the normal viewing angle (e.g., Figure 2 As shown in the diagram, the total internal reflection interface s can reduce the amount of light emitted in the oblique viewing direction. When the absolute value of the difference between the first and second ratios is too large, it will cause a significant difference in the display of the first and second display areas in the oblique viewing direction.

[0076] By setting the absolute value of the difference between the first and second ratios to be greater than or equal to 0 and less than or equal to 0.3, it can be ensured that the brightness difference between the first and second display areas is small in the oblique viewing direction, thereby improving the display uniformity of the first and second display areas in the oblique viewing direction.

[0077] In a specific implementation, the first total reflection interface s1 set in the first display area and the second total reflection interface s2 set in the second display area can be the same or different.

[0078] like Figure 3 As shown, the first total internal reflection interface s1 and the second total internal reflection interface s2 are the same, specifically including: the low refractive layer 22 disposed in the first display area and the low refractive layer 22 disposed in the second display area have the same thickness; the critical angle of total internal reflection of the first total internal reflection interface s1 and the second total internal reflection interface s2 are the same; the included angles between the first total internal reflection interface s1 and the second total internal reflection interface s2 and the display substrate are the same; and in the direction of the plane where the display substrate 21 is located, the minimum distance between the first total internal reflection interface s1 and the first light-emitting area A1 is equal to the minimum distance between the second total internal reflection interface s2 and the second light-emitting area A2; etc.

[0079] like Figures 5 to 10 As shown, the first total internal reflection interface s1 and the second total internal reflection interface s2 are not the same, and may specifically include at least one of the following: the low refractive layer 22 disposed in the first display area and the low refractive layer 22 disposed in the second display area have different thicknesses (e.g., Figure 5 As shown); the critical angles for total internal reflection of the first total internal reflection interface s1 and the second total internal reflection interface s2 are not the same (e.g. Figure 6 and Figure 7 As shown); the angles between the first total internal reflection interface s1 and the second total internal reflection interface s2 and the display substrate are different (e.g., Figure 8As shown); in the direction of the plane where the display substrate 21 is located, the minimum distance between the first total internal reflection interface s1 and the first light-emitting area A1 is not equal to the minimum distance between the second total internal reflection interface s2 and the second light-emitting area A2 (as shown). Figure 10 (as shown); etc.

[0080] In a specific implementation, the dimensional relationship between the first light-emitting area A1 and the second light-emitting area A2 in the plane where the display substrate 21 is located can be determined according to actual needs. For example, the size of the first light-emitting area A1 can be greater than, equal to or less than the size of the second light-emitting area A2. This disclosure does not limit this.

[0081] Optionally, in order to increase the area of ​​the light-transmitting region within the transparent display area and improve the transmittance of ambient light, the size of the first light-emitting region A1 is smaller than the size of the second light-emitting region A2 within the plane of the display substrate 21, such as... Figure 3 and Figure 4 As shown. In a specific implementation, the first luminous region A1 and the second luminous region A2, which satisfy the above size relationship, can have the same luminous color.

[0082] Reference Figure 4 A schematic diagram is shown where, with the first and second total internal reflection interfaces being identical, the display light emitted from the center of the first light-emitting region is incident on the first total internal reflection interface (e.g., ...). Figure 4 (as shown in Figure b) A schematic diagram of the display light emitted from the center of the second luminous region and incident on the second total internal reflection interface (as shown in Figure b). Figure 4 (as shown in Figure a).

[0083] like Figure 4 As shown, since the first light-emitting area A1 is smaller than the second light-emitting area A2, when the first total internal reflection interface s1 and the second total internal reflection interface s2 are the same, the incident angle α1 of the display light emitted from the first light-emitting area A1 is larger when it strikes the first total internal reflection interface s1, making total internal reflection more likely to occur. This allows more display light that was originally emitted from an oblique angle to be deflected to a normal angle. The higher proportion of total internal reflection results in a greater brightness attenuation in the first display area in the oblique angle direction than in the second display area, leading to a significant difference in the displayed images of the first and second display areas in the oblique angle direction. Figure 13 Figure a in the diagram shows Figure 3 The simulation image of the display panel shown is displayed at a 45° oblique angle. It can be seen that there is a significant difference between the display images of the first display area and the second display area at a 45° oblique angle.

[0084] Reference Figure 12 Figure a in the diagram shows Figure 3The simulation curves of brightness attenuation in the first and second display areas of the display panel are shown in various viewing angle directions. Figure 12 As shown in Figure a, the brightness attenuation of the first display area in the oblique viewing direction is greater than that of the second display area in the oblique viewing direction. Moreover, even if the brightness of the first and second display areas is made the same in the normal viewing direction through gamma adjustment, there will still be a significant difference in brightness at the oblique viewing direction.

[0085] To improve the uneven brightness of the first and second display areas at oblique viewing angles, this disclosure provides the following implementation methods.

[0086] In the first implementation, such as Figure 5 As shown, the low-refractive layer 22 includes a first low-refractive layer 51 located in the first display area and a second low-refractive layer 52 located in the second display area; in the normal direction of the display substrate 21, the thickness h1 of the first low-refractive layer 51 is smaller than the thickness h2 of the second low-refractive layer 52.

[0087] In this implementation, by setting low-refractive layers 22 of different thicknesses in the first display area and the second display area respectively, that is, setting a lower first low-refractive layer 51 in the first display area and a higher second low-refractive layer 52 in the second display area, the area of ​​the first total internal reflection interface s1 receiving the first display light can be reduced, so that the number of the first display light undergoing total internal reflection at the first total internal reflection interface s1 is less than the number of the second display light undergoing total internal reflection at the second total internal reflection interface s2. This reduces the difference in the proportion of display light undergoing total internal reflection between the first display area and the second display area, compensates for the brightness attenuation of the first display area in the oblique viewing angle direction, and improves the display uniformity of the first display area and the second display area in the oblique viewing angle direction.

[0088] Optionally, the difference between the thickness h2 of the second low-refractive layer 52 and the thickness h1 of the first low-refractive layer 51 is greater than or equal to 0.5 micrometers and less than or equal to 4 micrometers.

[0089] For example, the thickness h2 of the second low-refractive layer 52 can be greater than or equal to 3 micrometers and less than or equal to 5 micrometers, and the thickness h1 of the first low-refractive layer 51 can be greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers. For instance, the thickness h2 of the second low-refractive layer 52 can be 2 micrometers, and the thickness h1 of the first low-refractive layer 51 can be 4 micrometers.

[0090] The critical angle of total reflection of the first display light on the first total reflection interface s1 is the first critical angle, and the critical angle of total reflection of the second display light on the second total reflection interface s2 is the second critical angle. In order to improve the brightness difference between the first display area and the second display area at the oblique viewing angle, the first critical angle can be greater than the second critical angle.

[0091] In order to realize that the first critical angle is greater than the second critical angle, in a second implementation manner, as shown in Figure 6 The low-refractive layer 22 includes a first low-refractive layer 61 located in the first display area and a second low-refractive layer 62 located in the second display area; the refractive index of the first low-refractive layer 61 is greater than the refractive index of the second low-refractive layer 62.

[0092] In the implementation manner, by setting the low-refractive layer 22 with different refractive indexes in the first display area and the second display area, that is, setting the first low-refractive layer 61 with a higher refractive index in the first display area and setting the second low-refractive layer 62 with a lower refractive index in the second display area, according to the formula for calculating the critical angle of total reflection:

[0093] arcsin(n1 / n2), wherein n1 is the refractive index of the low-refractive layer 22, and n2 is the refractive index of the high-refractive layer 23;

[0094] It can be concluded that when the refractive index of the first low-refractive layer 61 is greater than the refractive index of the second low-refractive layer 62, the first critical angle corresponding to the first total reflection interface s1 is greater than the second critical angle corresponding to the second total reflection interface s2. In this way, the number of the first display light that is totally reflected at the first total reflection interface s1 is less than the number of the second display light that is totally reflected at the second total reflection interface s2, the difference in the proportion of the display light that is totally reflected in the first display area and the second display area is reduced, and the brightness attenuation amplitude of the first display area in the oblique viewing angle direction is compensated, thereby improving the display uniformity of the first display area and the second display area in the oblique viewing angle direction.

[0095] In the implementation manner, the first display area and the second display area can be provided with the high-refractive layer 23 with the same refractive index, which is not limited in the present disclosure.

[0096] Optionally, the difference between the refractive index of the first low-refractive layer 61 and the refractive index of the second low-refractive layer 62 is greater than or equal to 0.05 and less than or equal to 0.2.

[0097] For example, the refractive index of the first low-refractive layer 61 can be greater than or equal to 1.55 and less than or equal to 1.6, and the refractive index of the second low-refractive layer 62 can be greater than or equal to 1.45 and less than or equal to 1.5.

[0098] In order to realize that the first critical angle is greater than or equal to the second critical angle, in a third implementation manner, as shown inFigure 7 As shown, the high refractive index layer 23 includes a first high refractive index layer 71 located in the first display area and a second high refractive index layer 72 located in the second display area; the refractive index of the first high refractive index layer 71 is less than the refractive index of the second high refractive index layer 72.

[0099] In this implementation, high-refractive-index layers 23 with different refractive indices are respectively set in the first display area and the second display area. That is, a first high-refractive-index layer 71 with a lower refractive index is set in the first display area, and a second high-refractive-index layer 72 with a higher refractive index is set in the second display area. According to the formula for calculating the critical angle of total internal reflection:

[0100] arcsin(n1 / n2), where n1 is the refractive index of the low-refractive layer 22 and n2 is the refractive index of the high-refractive layer 23;

[0101] It can be concluded that when the refractive index of the first high refractive layer 71 is less than the refractive index of the second high refractive layer 72, the first critical angle corresponding to the first total internal reflection interface s1 is greater than the second critical angle corresponding to the second total internal reflection interface s2. This makes the number of first display rays undergoing total internal reflection at the first total internal reflection interface s1 less than the number of second display rays undergoing total internal reflection at the second total internal reflection interface s2, reducing the ratio difference of display rays undergoing total internal reflection between the first display area and the second display area, thereby compensating for the brightness attenuation amplitude of the first display area in the oblique viewing angle direction and improving the display uniformity of the first display area and the second display area in the oblique viewing angle direction.

[0102] In this implementation, the first display area and the second display area can be provided with a low-refractive layer 22 with the same refractive index, and this disclosure does not limit this.

[0103] Reference Figure 13 Figure b in the figure shows a simulated display of the display panel provided by the third implementation method at a 45° oblique viewing angle. It can be seen that by adopting the third implementation method, the display difference between the first display area and the second display area at an oblique viewing angle can be significantly improved.

[0104] Optionally, the difference between the refractive index of the second high-refractive layer 72 and the refractive index of the first high-refractive layer 71 is greater than or equal to 0.05 and less than or equal to 0.2.

[0105] For example, the refractive index of the first high-refractive layer 71 may be greater than or equal to 1.6 and less than or equal to 1.65, and the refractive index of the second high-refractive layer 72 may be greater than or equal to 1.65 and less than or equal to 1.7. For instance, the refractive index of the first high-refractive layer 71 may be 1.65, and the refractive index of the second high-refractive layer 72 may be 1.7.

[0106] In the fourth implementation, such as Figure 8As shown, the first total reflection interface s1 and the plane where the display substrate 21 is located form a first included angle θ1, and the first included angle θ1 is an acute angle in which the opening faces away from the first light-emitting area A1; the second total reflection interface s2 and the plane where the display substrate 21 is located form a second included angle θ2, and the second included angle θ2 is an acute angle in which the opening faces away from the second light-emitting area A2.

[0107] In the present implementation, the first included angle θ1 is greater than the second included angle θ2.

[0108] In a specific implementation, as shown in Figure 8 the first display area and the second display area are respectively provided with low-refraction layers 22 having different slope angles (an acute angle formed by the side of the low-refraction layer 22 facing the light-emitting area A and the plane where the display substrate 21 is located), that is, a first low-refraction layer 81 having a larger slope angle is arranged in the first display area, and a second low-refraction layer 82 having a smaller slope angle is arranged in the second display area, so that the first included angle θ1 between the first total reflection interface s1 and the plane where the display substrate 21 is located is greater than the second included angle θ2 between the second total reflection interface s2 and the plane where the display substrate 21 is located.

[0109] Referring to Figure 9 Fig. a and Fig. b, since the second included angle θ2 is smaller, the problem that the incident angle of the second display light on the second total reflection interface s2 is too small due to the larger size of the second light-emitting area A2 can be compensated, so that the incident angle α1 of the first display light on the first total reflection interface s1 and the incident angle α2 of the second display light on the second total reflection interface s2 are as consistent as possible, the difference in the proportion of display light that undergoes total reflection in the first display area and the second display area is reduced, and the luminance attenuation amplitude of the first display area in the oblique viewing angle direction is compensated, thereby improving the display uniformity of the first display area and the second display area in the oblique viewing angle direction.

[0110] Referring to Figure 13 Fig. c shows a display simulation picture of the display panel provided by the fourth implementation at 45° oblique viewing angle, and it can be seen that by using the fourth implementation, the display difference between the first display area and the second display area at the oblique viewing angle can be significantly improved.

[0111] Optionally, the difference between the first included angle θ1 and the second included angle θ2 is greater than or equal to 10° and less than or equal to 30°.

[0112] For example, the first included angle θ1 can be greater than or equal to 60° and less than or equal to 70°, and the second included angle θ2 can be greater than or equal to 40° and less than or equal to 50°.

[0113] In the fifth implementation, as shown in Figure 10As shown, the minimum distance between the orthographic projection of the first total reflection interface s1 on the display substrate 21 and the first light-emitting region A1 is a first distance d1, and the minimum distance between the orthographic projection of the second total reflection interface s2 on the display substrate 21 and the second light-emitting region A2 is a second distance d2, and the first distance d1 is greater than the second distance d2.

[0114] In a specific implementation, the first distance d1 can be greater than the second distance d2 by respectively setting different low-refraction layers 22 in the first display region and the second display region, i.e., setting a first low-refraction layer 101 in the first display region and a second low-refraction layer 102 in the second display region, and the minimum distance d1 between the orthographic projection of the first low-refraction layer 101 on the display substrate 21 and the first light-emitting region A1 is greater than the minimum distance d2 between the orthographic projection of the second low-refraction layer 102 on the display substrate 21 and the second light-emitting region A2, so that the first distance d1 can be greater than the second distance d2.

[0115] Referring to FIGS. a and b in Figure 11 , because the first distance d1 is greater, the problem of the large incident angle of the first display light on the first total reflection interface s1 caused by the small size of the first light-emitting region A1 can be balanced, so that the incident angle a1 of the first display light on the first total reflection interface s1 and the incident angle a2 of the second display light on the second total reflection interface s2 are as consistent as possible, the difference in the proportion of display light that undergoes total reflection in the first display region and the second display region is reduced, and then the luminance decay amplitude of the first display region in the diagonal viewing angle direction is compensated, and the display uniformity of the first display region and the second display region in the diagonal viewing angle direction is improved.

[0116] Optionally, the difference between the first distance d1 and the second distance d2 is greater than or equal to 3 microns and less than or equal to 6 microns.

[0117] Exemplarily, the first distance d1 can be greater than or equal to 4 microns and less than or equal to 6 microns, and the second distance d2 can be greater than or equal to 0 microns and less than or equal to 1 micron.

[0118] Referring to FIG. b in Figure 12 , the luminance decay simulation curves of the first display region and the second display region of the display panel in each viewing angle direction are shown after any one of the first to fifth implementation manners is adopted. As can be seen from FIG. b in Figure 12 , the difference in luminance decay of the first display region and the second display region in each viewing angle direction is obviously reduced.

[0119] As Figure 14As shown, the display area includes a first display area and a second display area, and the first display area and the light-transmitting area ( Figure 14 (Not shown in the image) constitutes a transparent display area. A second display area may at least partially surround the transparent display area.

[0120] In practice, an under-display camera module can be placed in the position corresponding to the transparent display area, thereby increasing the screen-to-body ratio. When taking a photo, the transparent display area lets in light but does not display the image, while ambient light can be captured by the under-display camera module through the transparent display area; when taking a photo, the transparent display area displays the image normally, and the under-display camera module is hidden, thus achieving a true full-screen display.

[0121] The inventors discovered that, compared to the second display area, the first display area has a smaller light-emitting area A or a lower density of light-emitting area A, resulting in a significant difference in display between the two areas, mainly manifested in the lower brightness of the first display area.

[0122] To reduce the display difference between the first display area and the second display area, in one optional implementation, such as Figure 14 As shown, the orthographic projection of the low-refractive layer 22 onto the display substrate 21 does not overlap with the second display area. Within the second display area, the high-refractive layer 23 covers the light-emitting area A and at least part of the non-light-emitting area B.

[0123] In this implementation, by setting the total reflection interface s only in the first display area, the light emission efficiency of the first display area, especially the front light emission efficiency, can be improved, the difference in front light emission efficiency between the first display area and the second display area can be reduced, and the uniformity of the frontal viewing angle display between the first display area and the second display area can be improved.

[0124] In one alternative implementation, such as Figure 14 As shown, the display panel also includes a planarization layer 141 disposed on the side of the high refractive layer 23 away from the display substrate 21, wherein the refractive index of the planarization layer 141 is less than the refractive index of the high refractive layer 23.

[0125] In this implementation, the orthogonal projection of the high-refractive-index layer 23 onto the display substrate 21 covers the edge region of the light-emitting region A and the non-light-emitting region B near the light-emitting region A.

[0126] Specifically, when a low-refractive-index layer 22 is disposed between the high-refractive-index layer 23 and the display substrate 21, such as Figure 14 The first display area shown has a high-refractive-index layer 23 covering at least the light-emitting area A and the side of the low-refractive-index layer 22 facing the light-emitting area A; when no low-refractive-index layer 22 is disposed between the high-refractive-index layer 23 and the display substrate 21, such as Figure 14The second display area shown has a high-refractive-index layer 23 that covers at least the edge region of the non-luminescent region B near the luminescent region A.

[0127] In this design, the side of the high-refractive-index layer 23 facing away from the light-emitting region A contacts the planarization layer 141 to form a refractive interface r. The angle between the refractive interface r and the plane containing the display substrate 21 is a second acute angle β, and the opening of the second acute angle β faces the light-emitting region A. The refractive interface r is used to refract the display light incident on the refractive interface r.

[0128] like Figure 14 As shown, the display light emitted from the light-emitting region A and incident on the refractive interface r through the high refractive layer 23 is refracted. Since the refractive index of the planarization layer 141 is less than that of the high refractive layer 23, the angle between the refracted light entering the planarization layer 141 through the refractive interface r and the normal of the refractive interface r increases, making the refracted light closer to the normal direction of the display substrate 21, thereby further improving the front light emission efficiency.

[0129] Optionally, such as Figure 14 As shown, the orthographic projection of the refractive interface r onto the display substrate 21 is located within the edge region, that is, the orthographic projection of the refractive interface r onto the display substrate 21 is located within the non-light-emitting region.

[0130] In one alternative implementation, such as Figure 15 and Figure 16 As shown, the high refractive layer 23 includes a first high-refractive-index portion 151 and a second high-refractive-index portion 152, and the orthographic projection of the first high-refractive-index portion 151 and the second high-refractive-index portion 152 on the display substrate 21 covers the display area.

[0131] The first high-bend portion 151, when projected onto the display substrate 21, covers the edge region of the light-emitting region A and the non-light-emitting region B near the light-emitting region A; the surface of the first high-bend portion 151 facing away from the display substrate 21 is higher than or equal to the surface of the second high-bend portion 152 facing away from the display substrate 21.

[0132] Specifically, when a low-refractive-index layer 22 is disposed between the high-refractive-index layer 23 and the display substrate 21, such as Figure 15 or Figure 16 The first display area shown has a first high-reflection portion 151 that at least covers the light-emitting area A and the side of the low-refractive layer 22 facing the light-emitting area A; when no low-refractive layer 22 is disposed between the high-refractive layer 23 and the display substrate 21, such as Figure 15 or Figure 16 The second display area shown has a first high fold 151 that at least covers the edge area of ​​the non-light-emitting area B near the light-emitting area A.

[0133] like Figure 15As shown, when the surface of the first high-refraction part 151 away from the display substrate 21 is higher than the surface of the second high-refraction part 152 away from the display substrate 21, the part of the first high-refraction part 151 higher than the second high-refraction part 152 is in contact with the flat layer 141 on the side away from the light-emitting area A to form a refraction interface r.

[0134] As shown, when the surface of the first high-refraction part 151 away from the display substrate 21 is higher than the surface of the second high-refraction part 152 away from the display substrate 21, the part of the first high-refraction part 151 higher than the second high-refraction part 152 is in contact with the flat layer 141 on the side away from the light-emitting area A to form a refraction interface r. Figure 16 As shown, when the surface of the first high-refraction part 151 away from the display substrate 21 is higher than the surface of the second high-refraction part 152 away from the display substrate 21, the part of the first high-refraction part 151 higher than the second high-refraction part 152 is in contact with the flat layer 141 on the side away from the light-emitting area A to form a refraction interface r.

[0135] As shown, the display substrate 21 can include, in sequence along the light-emitting direction, a substrate substrate 211, a first electrode layer 212, a pixel definition layer 213, a light-emitting layer 214, a second electrode layer (not shown in the figure), and an encapsulation layer 215, and the like. The encapsulation layer is used to protect the light-emitting substrate. Figure 3

[0136] The pixel definition layer 213 includes an opening area and a non-opening area, the opening area corresponds to the light-emitting area A, and the non-opening area corresponds to the non-light-emitting area B.

[0137] As shown, the display panel can further include one or more of a touch layer 171 and a built-in polarizing layer 172, and the like, which are arranged in sequence along the light-emitting direction between the display substrate 21 and the low-refraction layer 22. The touch layer 171 is used to realize the touch function of the display panel. The built-in polarizing layer 172 is used to reduce the reflection of ambient light by the display substrate. Figure 17 In the embodiment, the touch layer 171 is arranged close to the display substrate 21, and the built-in polarizing layer 172 is arranged on the side of the touch layer 171 away from the display substrate 21. In specific implementation, the positions of the touch layer 171 and the built-in polarizing layer 172 can be interchanged, for example, the built-in polarizing layer 172 can be arranged close to the display substrate 21, and the touch layer 171 is arranged on the side of the built-in polarizing layer 172 away from the display substrate 21, which is not limited in the present disclosure.

[0138] Figure 17

[0139] ​​​Optionally, the built-in polarizing layer 172 can include color resist portions 172A and light shielding portions 172B, wherein the normal projection of the color resist portions 172A on the display substrate 21 covers the light emitting area A, and the normal projection of the light shielding portions 172B on the display substrate 21 is located within the range of the non-light emitting area B. The color of the color resist portion 172A corresponding in position to the normal direction of the display substrate 21 can be the same as that of the light emitting area A. For example, the color resist portion 172A corresponding to the red light emitting area R is a red color resist CR-R, the color resist portion 172A corresponding to the green light emitting area G is a green color resist CR-G, and the color resist portion 172A corresponding to the blue light emitting area B is a blue color resist CR-B.

[0140] In a specific implementation, the display panel provided by the present disclosure can further include a cover plate (not shown in the figure) disposed on the side of the high-refractive layer 23 away from the display substrate 21, and the cover plate material can be, for example, transparent polyimide or glass, etc., which is not limited by the present disclosure.

[0141] The present disclosure provides a display device including any of the provided display panels.

[0142] Since the display device includes the above-mentioned display panel, those skilled in the art can understand that the display device has the advantages of the display panel provided by the present disclosure, which will not be repeated here.

[0143] It should be noted that the display device in the present embodiment can be any product or component with 2D or 3D display function, such as a display panel, electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, virtual reality device, augmented reality device, under-screen camera device, and navigation device, etc.

[0144] The present disclosure provides a method for manufacturing a display module, the display panel including a display area and a light-transmitting area, the display area being used for displaying a picture, and the light-transmitting area being used for transmitting ambient light. The method for manufacturing the display area includes:

[0145] Step S01: providing a display substrate including a light emitting area and a non-light emitting area surrounding the light emitting area.

[0146] Step S02: forming a low-refractive layer on the light-outgoing side of the display substrate, the normal projection of the low-refractive layer on the display substrate being located within the range of the non-light emitting area.

[0147] Step S03: forming a high-refractive layer on the side of the low-refractive layer away from the display substrate, the high-refractive layer covering at least the light emitting area and the side of the low-refractive layer facing the light emitting area.

[0148] The high-refractive layer has a refractive index greater than that of the low-refractive layer, and a side of the low-refractive layer facing the light-emitting region is in contact with the high-refractive layer to form a total reflection interface, which is used to cause total reflection of display light emitted from the light-emitting region and entering through the high-refractive layer.

[0149] The display module can be prepared by using the preparation method provided in the present disclosure.

[0150] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0151] Finally, it should be noted that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, product or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, product or equipment including the element.

[0152] The above describes in detail the display panel and display device provided by the present disclosure. The principles and implementation manners of the present disclosure are described by applying specific examples. The above description of the embodiments is only used to help understand the method and core idea of the present disclosure. Meanwhile, for those skilled in the art, according to the idea of the present disclosure, the specific implementation manners and application ranges can be changed. In summary, the content of the specification should not be understood as a limitation of the present disclosure.

[0153] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon considering the specification and practice of the disclosed application. The present disclosure is intended to cover any variations, uses or adaptive changes of the present disclosure following the general principles of the present disclosure and including common knowledge or conventional technical means in the art which are not disclosed by the present disclosure. The specification and examples are only considered as exemplary, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0154] It is to be understood that the present disclosure is not limited to the precise construction that has been described and shown in the accompanying drawings, and that various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the disclosure. The scope of the disclosure is limited only by the claims that follow.

[0155] Reference herein to "one embodiment", "an embodiment" or "one or more embodiments" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0156] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

[0157] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The disclosure can be implemented by means of both hardware and software, and any combination thereof. In a unit claim, several elements can be presented - the use of "each" before the first of these elements does not exclude the presence of additional such elements subsequent to the first so introduced. The usage of the words "first", "second" and other similar terms does not imply any order. These terms can be used to name different instances of an element and do not imply that the elements so named must occur in that given order.

[0158] Finally, it should be noted that the above-mentioned embodiments are merely intended for explaining the technical solutions of the present disclosure, rather than limiting the present disclosure; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions recorded in the foregoing embodiments, or equivalently replace some technical features thereof; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A display panel, comprising a display area and a light-transmitting area, wherein the display area is used to display an image, and the light-transmitting area is used to transmit ambient light; wherein, The display area includes a first display area and a second display area, wherein the first display area and the light-transmitting area constitute a transparent display area; the display area includes: A display substrate includes a light-emitting area and a non-light-emitting area surrounding the light-emitting area; A low-refractive layer disposed on the light-emitting side of the display substrate, wherein the orthogonal projection of the low-refractive layer on the display substrate is located within the non-light-emitting area; A high-refractive-index layer is disposed on the side of the low-refractive-index layer opposite to the display substrate, the high-refractive-index layer at least covering the light-emitting area and the side of the low-refractive-index layer facing the light-emitting area; Wherein, the refractive index of the high-refractive layer is greater than that of the low-refractive layer, and the side of the low-refractive layer facing the light-emitting area is in contact with the high-refractive layer to form a total internal reflection interface. The total internal reflection interface is used to cause total internal reflection of display light emitted from the light-emitting area and incident through the high-refractive layer. The total internal reflection interface includes a first total internal reflection interface located in the first display area and a second total internal reflection interface located in the second display area. The light-emitting area includes a first light-emitting area located in the first display area and a second light-emitting area located in the second display area. The minimum distance between the orthographic projection of the first total internal reflection interface on the display substrate and the first light-emitting area is a first distance, and the minimum distance between the orthographic projection of the second total internal reflection interface on the display substrate and the second light-emitting area is a second distance. The first distance is greater than the second distance.

2. The display panel according to claim 1, wherein, The angle between the total reflection interface and the plane where the display substrate is located is a first acute angle, and the opening of the first acute angle faces away from the light-emitting area.

3. The display panel according to claim 2, wherein, The first acute angle is greater than or equal to 20° and less than or equal to 80°.

4. The display panel according to any one of claims 1 to 3, wherein, The first total internal reflection interface is used to perform total internal reflection on the first display light emitted from the first light-emitting area, and the proportion of the first display light in the display light emitted from the first light-emitting area is a first ratio; the second total internal reflection interface is used to perform total internal reflection on the second display light emitted from the second light-emitting area, and the proportion of the second display light in the display light emitted from the second light-emitting area is a second ratio; the absolute value of the difference between the first ratio and the second ratio is greater than or equal to 0 and less than or equal to 0.

3.

5. The display panel according to claim 4, wherein, Within the plane of the display substrate, the size of the first light-emitting area is smaller than the size of the second light-emitting area.

6. The display panel according to claim 5, wherein, The low-refractive layer includes a first low-refractive layer located in the first display area and a second low-refractive layer located in the second display area; in the normal direction of the display substrate, the thickness of the first low-refractive layer is less than the thickness of the second low-refractive layer.

7. The display panel according to claim 6, wherein, The difference between the thickness of the second low-refractive layer and the thickness of the first low-refractive layer is greater than or equal to 0.5 micrometers and less than or equal to 4 micrometers.

8. The display panel according to any one of claims 5 to 7, wherein, The critical angle at which the first display light undergoes total internal reflection at the first total internal reflection interface is greater than the critical angle at which the second display light undergoes total internal reflection at the second total internal reflection interface.

9. The display panel according to claim 8, wherein, The low-refractive layer includes a first low-refractive layer located in the first display area and a second low-refractive layer located in the second display area; the refractive index of the first low-refractive layer is greater than the refractive index of the second low-refractive layer.

10. The display panel according to claim 9, wherein, The difference between the refractive index of the first low-refractive layer and the refractive index of the second low-refractive layer is greater than or equal to 0.05 and less than or equal to 0.

2.

11. The display panel according to any one of claims 8 to 10, wherein, The high-refractive-index layer includes a first high-refractive-index layer located in the first display area and a second high-refractive-index layer located in the second display area; the refractive index of the first high-refractive-index layer is less than the refractive index of the second high-refractive-index layer.

12. The display panel according to claim 11, wherein, The difference between the refractive index of the second high-refractive layer and the refractive index of the first high-refractive layer is greater than or equal to 0.05 and less than or equal to 0.

2.

13. The display panel according to any one of claims 5 to 12, wherein, The angle between the first total reflection interface and the plane where the display substrate is located is the first included angle, which is an acute angle where the opening faces away from the first light-emitting area; the angle between the second total reflection interface and the plane where the display substrate is located is the second included angle, which is an acute angle where the opening faces away from the second light-emitting area; the first included angle is greater than the second included angle.

14. The display panel according to claim 13, wherein, The difference between the first included angle and the second included angle is greater than or equal to 10° and less than or equal to 30°.

15. The display panel according to any one of claims 5 to 14, wherein, The difference between the first distance and the second distance is greater than or equal to 3 micrometers and less than or equal to 6 micrometers.

16. The display panel according to any one of claims 1 to 3, wherein, The orthographic projection of the low-refractive layer on the display substrate does not overlap with the second display area. Within the second display area, the high-refractive layer covers the light-emitting area and at least a portion of the non-light-emitting area.

17. The display panel according to any one of claims 1 to 16, wherein, The display panel further includes: a planarization layer disposed on the side of the high refractive layer away from the display substrate, wherein the refractive index of the planarization layer is less than the refractive index of the high refractive layer; The orthogonal projection of the high-refractive-index layer onto the display substrate covers the light-emitting area and the edge region of the non-light-emitting area near the light-emitting area; The high-refractive-index layer and the planarization layer are in contact with each other to form a refractive interface. The angle between the refractive interface and the plane where the display substrate is located is a second acute angle, and the opening of the second acute angle faces the light-emitting area.

18. The display panel according to any one of claims 1 to 16, wherein, The high-refractive-index layer includes a first high-refractive-index portion and a second high-refractive-index portion, the orthogonal projections of the first high-refractive-index portion and the second high-refractive-index portion on the display substrate covering the display area; Wherein, the orthographic projection of the first high-reflection portion on the display substrate covers the light-emitting area and the edge area of ​​the non-light-emitting area near the light-emitting area; the surface of the first high-reflection portion away from the display substrate is higher than or equal to the surface of the second high-reflection portion away from the display substrate.

19. A display device comprising a display panel as described in any one of claims 1 to 18.

Images