Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel includes: a pixel layer including a plurality of sub-pixels of different light emitting colors; the light path regulation and control layer is arranged on the light emitting side of at least part of sub-pixels in the pixel layer, the light path regulation and control layer comprises a first refraction layer and a second refraction layer, the first refraction layer comprises a limiting part and a plurality of openings formed in the limiting part, and the second refraction layer is located on the side, away from the pixel layer, of the limiting part and located in the openings; the orthographic projection of at least one light-emitting color sub-pixel on the light path regulation and control layer is located in the opening; the refractive index of the second refractive material of the second refractive layer is greater than the refractive index of the first refractive material of the first refractive layer. According to the invention, the brightness decay of the sub-pixels of different colors tends to be consistent, the brightness decay of the sub-pixels of a certain light emitting color is accelerated or slowed down, and the visual angle color cast of the display panel is reduced.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] In recent years, with the development of display technology, people have increasingly higher requirements for the display performance of display panels.

[0003] In existing technologies, organic light-emitting diodes (OLEDs) utilize microcavity structures to significantly enhance luminous efficiency, improve color purity, and further expand the color gamut. However, the presence of microcavities also causes color shift in the panel at different viewing angles, resulting in phenomena such as a reddish or bluish tint when viewing the panel from different angles. Summary of the Invention

[0004] The present invention provides a display panel and display device to reduce the difference in the rate of brightness decay of sub-pixels of different colors as the viewing angle increases, thereby improving the viewing angle distortion phenomenon.

[0005] In a first aspect, embodiments of the present invention provide a display panel, comprising:

[0006] A pixel layer, comprising multiple sub-pixels with different emission colors;

[0007] An optical path control layer is disposed on the light-emitting side of at least some of the sub-pixels in the pixel layer. The optical path control layer includes a first refractive layer and a second refractive layer. The first refractive layer includes a limiting portion and a plurality of openings formed in the limiting portion. The second refractive layer is located on the side of the limiting portion away from the pixel layer and within the openings. The orthogonal projection of at least one emitting color sub-pixel in the optical path control layer is located within the openings. The refractive index of the second refractive material of the second refractive layer is greater than the refractive index of the first refractive material of the first refractive layer.

[0008] Furthermore, the limiting portion includes a top surface away from the pixel layer and a bottom surface close to the pixel layer; between adjacent openings, the area of ​​the top surface of the limiting portion is smaller than the area of ​​the bottom surface; the area of ​​the top surface of the opening is larger than the area of ​​the bottom surface of the opening.

[0009] Furthermore, the limiting portion also includes a side surface connecting the top surface and the bottom surface, the side surface being used to vertically incident at least a portion of the light emitted by the sub-pixel of at least one luminous color onto the second refractive layer after total internal reflection, the at least a portion of the light including light emitted along a set direction, the set direction intersecting the direction of the light emitted vertically from the sub-pixel.

[0010] Furthermore, the angle between the side surface and the bottom surface is less than 90 degrees, so that light emitted in a predetermined direction by the sub-pixel of at least one luminous color undergoes total internal reflection on the side surface.

[0011] Furthermore, the sub-pixel includes a first emitting color sub-pixel and a second emitting color sub-pixel, and the vertical projection of the defining portion on the pixel layer is at least partially located between the first emitting color sub-pixel and the second emitting color sub-pixel; the defining portion includes a first sub-defining portion and a second sub-defining portion, and along the line connecting the first emitting color sub-pixel and the second emitting color sub-pixel, the first sub-defining portion is closer to the first emitting color sub-pixel than the second sub-defining portion; the first sub-defining portion includes a first side surface away from the second sub-defining portion, and the second sub-defining portion includes a second side surface away from the first sub-defining portion;

[0012] When the brightness decay rate of the first emitting color sub-pixel with increasing viewing angle is less than that of the second emitting color sub-pixel with increasing viewing angle, the thickness of the first sub-limiting portion is greater than the thickness of the second sub-limiting portion, or the angle between the first side surface and the bottom surface of the limiting portion is less than the angle between the second side surface and the bottom surface of the limiting portion; wherein, the smaller the brightness decay rate of the first emitting color sub-pixel with increasing viewing angle, the smaller the angle between the first side surface and the bottom surface of the limiting portion.

[0013] Furthermore, the top surface of the limiting portion is an inclined surface; or the top surface of the limiting portion includes a first top surface, a second top surface, and a transition connecting surface, wherein the first top surface is the top surface of the first sub-limiting portion, the second top surface is the top surface of the second sub-limiting portion, and the first top surface and the second top surface are connected by the transition connecting surface.

[0014] Furthermore, the thickness of the limiting portion is 1-4 μm.

[0015] Furthermore, the refractive index of the first refractive material is between 1.2 and 1.6, and the refractive index of the second refractive material is between 1.6 and 1.9.

[0016] Furthermore, the display panel also includes a thin-film encapsulation layer, which is located between the pixel layer and the optical path control layer.

[0017] Secondly, embodiments of the present invention also provide a display device, including the display panel described above.

[0018] This invention provides a display panel and a display device. The display panel includes a pixel layer comprising a plurality of sub-pixels of different emitting colors; a light path control layer disposed on the light-emitting side of at least some of the sub-pixels in the pixel layer, the light path control layer comprising a first refractive layer and a second refractive layer, the first refractive layer comprising a limiting portion and a plurality of openings formed in the limiting portion, the second refractive layer being located on the side of the limiting portion away from the pixel layer and within the openings; the orthographic projection of at least one emitting color sub-pixel onto the light path control layer is located within the openings; the refractive index of the second refractive material of the second refractive layer is greater than the refractive index of the first refractive material of the first refractive layer, thereby causing at least a portion of the obliquely emitted light from the at least one emitting color sub-pixel to be converted into vertically emitted light, thereby causing changes in the brightness attenuation of different sub-pixels, thus accelerating or slowing down the brightness attenuation of at least one emitting color sub-pixel with changing viewing angle, thereby reducing the difference in the brightness attenuation rate of different emitting color sub-pixels with changing viewing angle, making the brightness attenuation of different color sub-pixels tend to be consistent, and improving the viewing angle viewing angle of the display panel. Attached Figure Description

[0019] Figure 1 The graph shows the brightness decay curves of pixels with different emitting colors as a function of angle, provided for embodiments of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the optical path of a sub-pixel under a set direction, provided in an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention.

[0024] Figure 6 This is a cross-sectional schematic diagram of a limiting portion provided in an embodiment of the present invention. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0026] Figure 1 This is a graph showing the brightness decay curves of pixels with different emitting colors as a function of angle in existing technologies, such as... Figure 1 As shown, Figure 1The horizontal axis represents different viewing angles of the display panel. Figure 1 The vertical axis represents the luminance of a pixel. Pixels of different luminous colors experience different luminance decay rates with changing angles; red pixels decay more slowly, while blue pixels decay more quickly, causing viewfinder distortion (or reddish / blueish tints) on the panel. This is because the luminance of R / G / B pixels decays at different rates at the same angle. This invention provides a display panel to improve the problem of inconsistent luminance decay caused by R / G / B pixels with changing viewing angles, thus reducing viewfinder distortion.

[0027] Figure 2 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, such as... Figure 2 As shown, the display panel includes a pixel layer 110, which includes a plurality of sub-pixels 111 with different emitting colors; and a light path control layer 120, which is disposed on the light-emitting side of at least some of the sub-pixels 111 in the pixel layer 110. The light path control layer 120 includes a first refractive layer 121 and a second refractive layer 122. The first refractive layer 121 includes a limiting portion 1211 and a plurality of openings 1212 formed in the limiting portion. The second refractive layer 122 is located on the side of the limiting portion 1211 away from the pixel layer 110 and within the openings 1212. The orthographic projection of at least one emitting color sub-pixel 111 onto the light path control layer 120 is located within the openings 1212. The refractive index of the second refractive material of the second refractive layer 122 is greater than the refractive index of the first refractive material of the first refractive layer 121.

[0028] Among them, such as Figure 2 As shown, the display panel also includes a driving layer 130, which is located below the pixel layer 110. The driving layer 130 may include thin-film transistors. Light emitted from the sub-pixels 111 exits the display panel through the light path control layer 120. The light path control layer 120 includes a first refractive layer 121 and a second refractive layer 122. The first refractive layer 121 includes a patterned defining portion 1211 and a plurality of openings 1212 formed in the defining portion. The second refractive layer 122 is disposed on the side of the defining portion 1211 away from the pixel layer 110 and within the openings 1212. The cross-section of the patterned defining portion 1211 may be trapezoidal or... Figure 2The shape of the limiting portion 1211 is shown. The refractive materials in the limiting portion 1211 and the opening 1212 are different. The refractive index of the second refractive material in the opening 1212 is greater than that of the first refractive material in the limiting portion 1211. This causes total internal reflection when the light emitted by the sub-pixel 111 passes through the second refractive layer 122 and enters the limiting portions 1211 on both sides above the sub-pixel 111. By setting the thickness and edge slope of the limiting portion 1211, light emitted by sub-pixels 111 of different luminous colors at different angles of inclination can be converted into vertically emitted light after reflection. In addition, the orthographic projection of at least one luminous color sub-pixel 111 in the light path control layer 120 is located in the opening 1212. That is, the limiting portion 1211 is located above the gap between sub-pixels 111 of different luminous colors. This helps to reduce the manufacturing difficulty of the limiting portion 1211 while ensuring that the brightness attenuation of the light emitted by sub-pixels 111 of different luminous colors tends to be uniform, thereby reducing the production cost of the display panel.

[0029] Specifically, as the viewing angle increases, the brightness attenuation rate of light emitted by sub-pixels 111 of different luminous colors varies, resulting in reddish or bluish tints when viewing the display panel from different angles. By setting up a light path control layer 120 and patterned limiting parts 1211 on the light path control layer 120, the light emitted by sub-pixels 111 of different luminous colors at different oblique angles is reflected and converted into vertically emitted light. At the same time, since the refractive index of the second refractive material of the second refractive layer 122 is greater than that of the first refractive material of the first refractive layer 121, the light emitted by sub-pixels 111 undergoes total internal reflection when it passes through the second refractive layer 122 and enters the limiting part 1211, thereby causing the brightness attenuation of light emitted by different sub-pixels 111 to change. By adjusting the thickness of the limiting parts 1211 on both sides above different sub-pixels 111, the brightness attenuation of light emitted by sub-pixels 111 of different luminous colors can be made more uniform, thereby reducing the viewing angle distortion of the display panel.

[0030] The technical solution of this embodiment includes a display panel comprising a pixel layer, including multiple sub-pixels of different emitting colors; and a light path control layer disposed on the light-emitting side of at least some of the sub-pixels in the pixel layer. The light path control layer includes a first refractive layer and a second refractive layer. The first refractive layer includes a limiting portion and multiple openings formed in the limiting portion. The second refractive layer is located on the side of the limiting portion away from the pixel layer and within the openings. The orthogonal projection of at least one emitting color sub-pixel onto the light path control layer is located within the openings. The refractive index of the second refractive material of the second refractive layer is greater than the refractive index of the first refractive material of the first refractive layer, thereby causing at least a portion of the obliquely emitted light from the at least one emitting color sub-pixel to be converted into vertically emitted light. This causes a change in the brightness attenuation of different sub-pixels, thereby accelerating or slowing down the brightness attenuation of at least one emitting color sub-pixel with varying viewing angle, thereby reducing the difference in the brightness attenuation rate of different emitting color sub-pixels with varying viewing angle, making the brightness attenuation of different color sub-pixels more consistent, and improving the viewing angle-dependent color bias of the display panel.

[0031] Figure 3 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 3 As shown, the limiting portion 1211 includes a top surface 12111 away from the pixel layer 110 and a bottom surface 12112 close to the pixel layer 110; between adjacent openings 1212, the area of ​​the top surface 12111 of the limiting portion 1211 is smaller than the area of ​​the bottom surface 12112; the area of ​​the top surface 12121 of the opening 1212 is larger than the area of ​​the bottom surface 12122 of the opening. Correspondingly, the side surface of the limiting portion 1211 is an inclined surface.

[0032] Specifically, the cross-section of the limiting portion 1211 is patterned, and the limiting portion 1211 is evenly distributed directly above the area between the different color light-emitting sub-pixels 1211. This allows the light emitted by the different color light-emitting sub-pixels 1211 at an oblique viewing angle to be reflected by the side of the limiting portion 1211 and converted into vertically emitted light, thereby causing the brightness attenuation of the light emitted by the different color light-emitting sub-pixels 1211 at an oblique viewing angle to change.

[0033] Further reference Figure 3 The limiting part 1211 also includes a side surface 12113 connecting the top surface 12111 and the bottom surface 12112. The side surface 12113 is used to vertically incident at least a portion of the light emitted by the sub-pixel 111 of at least one luminous color onto the second refractive layer 122 after total internal reflection. The at least a portion of the light includes light emitted along a set direction, which intersects with the direction of the light emitted vertically from the sub-pixel.

[0034] The setting direction is the oblique viewing angle direction of the sub-pixel 111 when viewed from the pixel layer 110. For example, the angle between the setting direction and the pixel layer 110 is 70°. By setting the tilt of the side 12113, the light emitted by the sub-pixel 111 towards the setting direction will undergo total internal reflection after passing through the side 12113. Therefore, part of the light emitted by the sub-pixel 111 towards the setting direction is reflected by the side 12113 and not refracted by the limiting part 1211. As a result, part of the light emitted by the sub-pixel 111 towards the setting direction is reflected by the side 12113 and incident perpendicularly into the second refractive layer 122, thereby reducing the amount of light ultimately emitted by the sub-pixel 111 towards the setting direction. By setting the height of the limiting part 1211, the brightness of the light emitted by sub-pixels 111 of different colors towards the setting direction can be controlled, so that the brightness attenuation of the light emitted by sub-pixels 111 of different colors towards the setting direction tends to be uniform.

[0035] Furthermore, the angle between the side surface 12113 and the bottom surface 12112 is less than 90 degrees, so that light emitted by the sub-pixel 111 of at least one luminous color in a predetermined direction undergoes total internal reflection at the side surface 12113.

[0036] Specifically, the angle between the side surface 12113 and the bottom surface 12112 can be set to less than 90 degrees, so that the light emitted by the sub-pixel 111 of at least one luminous color in the set direction undergoes total internal reflection at the side surface 12113, and the light emitted by the sub-pixel 111 of at least one luminous color in the set direction can be vertically reflected by the side surface 12113 to the second refractive layer 122, thereby controlling the brightness of the light emitted by the sub-pixels 111 of different luminous colors in the set direction, so that the brightness attenuation of the light emitted by the sub-pixels 111 of different colors in the set direction tends to be consistent.

[0037] To further illustrate the reflection process of sub-pixel 111 under a given direction, Figure 4 This is a schematic diagram of the optical path of a sub-pixel under a set direction provided in an embodiment of the present invention, wherein, Figure 4 The thickness of the left-side limiting part 1211 is greater than Figure 4 The thickness of the right-side limiting portion 1211. For example... Figure 4 As shown, some of the light emitted from sub-pixel 111 can be vertically reflected by the side of the limiting portion 1211 to the second refractive layer 122. Specifically, the thickness of the left limiting portion 1211 is greater than... Figure 4 The thickness of the right-side limiting portion 1211 makes Figure 4 Light emitted from the region with a width of d1 in the left sub-pixel 111 can be vertically reflected by the side of the limiting part 1211 to the second refractive layer 122. Figure 4Light emitted from the right-hand sub-pixel 111 with a width of d2 can be vertically reflected by the side of the limiting portion 1211 to the second refractive layer 122, where d1 > d2. For example, when the display panel is reddish in a set direction, meaning the red sub-pixel 111 experiences slower brightness decay in that direction, the edge thickness of the limiting portion 1211 above the red sub-pixel 111 can be increased. This allows some of the light emitted by the red sub-pixel 111 along the set direction to be perpendicularly incident on the second refractive layer 122, thus making the brightness of light emitted by sub-pixels 111 of different luminous colors tend to be consistent in the set direction. Therefore, the thickness of the limiting portion 1211 on sub-pixels 111 with slower brightness decay with angle can be increased, and the thickness of the limiting portion 1211 on sub-pixels 111 with slower brightness decay with angle can be decreased. By adjusting the thickness of the limiting portion 1211, the brightness of light emitted by sub-pixels 111 of different luminous colors under different limiting portions 1211 can tend to be consistent in the set direction.

[0038] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, such as... Figure 4 and Figure 5 As shown, sub-pixel 111 includes a first emitting color sub-pixel 1111 and a second emitting color sub-pixel 1112. The limiting portion 1211 is at least partially located between the first emitting color sub-pixel 1111 and the second emitting color sub-pixel 1112 in the vertical projection of the pixel layer 110. The limiting portion 1211 includes a first sub-limiting portion A and a second sub-limiting portion B. Along the line connecting the first emitting color sub-pixel 1111 and the second emitting color sub-pixel 1112, the first sub-limiting portion A is closer to the first emitting color sub-pixel than the second sub-limiting portion B. The first sub-limiting portion A includes a first side surface away from the second sub-limiting portion, and the second sub-limiting portion B includes a second side surface away from the first sub-limiting portion.

[0039] When the brightness decay rate of the first luminous color sub-pixel 1111 as the viewing angle increases is less than the brightness decay rate of the second luminous color sub-pixel 1112 as the viewing angle increases, the thickness of the first sub-limiting portion A is greater than the thickness of the second sub-limiting portion B, or the angle between the first side surface A and the bottom surface of the limiting portion 1211 is less than the angle between the second side surface and the bottom surface of the limiting portion 1211; wherein, the smaller the brightness decay rate of the first luminous color sub-pixel 1111 as the viewing angle increases, the smaller the angle between the first side surface A and the bottom surface of the limiting portion 1211.

[0040] Specifically, the first luminous color sub-pixel 1111 and the second luminous color sub-pixel 1112 are pixels with different luminous colors. When the brightness decay rate of the first luminous color sub-pixel 1111 as the viewing angle increases is less than that of the second luminous color sub-pixel 1112 as the viewing angle increases, the limiting part 1211 is set to include a first sub-limiting part A and a second sub-limiting part B, so that the thicknesses on both sides of the limiting part 1211 are different. This allows the thicknesses of the limiting parts 1211 on both sides above the first luminous color sub-pixel 1111 to be the same, and the thicknesses of the limiting parts 1211 on both sides above the second luminous color sub-pixel 1112 to be the same. This allows the light emitted by the first luminous color sub-pixel 1111 and the second luminous color sub-pixel 1112 at an oblique viewing angle to be vertically reflected by the oblique surfaces of the limiting parts 1211 on both sides to the second refractive layer 122, thereby controlling the brightness decay rate of the light emitted by the first luminous color sub-pixel 1111 and the second luminous color sub-pixel 1112 at an oblique viewing angle. When the brightness decay rate of the first luminous color sub-pixel 1111 with increasing viewing angle is less than that of the second luminous color sub-pixel 1112, by setting the thickness of the first sub-limiting portion A corresponding to the upper two sides of the first luminous color sub-pixel 1111 to be greater than the thickness of the second sub-limiting portion B corresponding to the upper two sides of the second luminous color sub-pixel 1112, more light emitted by the first luminous color sub-pixel 1111 towards the oblique viewing angle can be reflected and perpendicularly incident into the second refractive layer 122. This results in less light ultimately emitted by the first luminous color sub-pixel 1111 towards the oblique viewing angle, making the brightness of the light emitted by the first luminous color sub-pixel 1111 and the second luminous color sub-pixel 1112 tend to be consistent at the oblique viewing angle. In other words, by setting the thickness on both sides of the same limiting portion 1211, the brightness of the light emitted by pixels of different luminous colors under different limiting portions 1211 tends to be consistent at the oblique viewing angle, reducing the viewing angle distortion of the display panel.

[0041] Continue to refer to Figure 5 The first side is the side of the first sub-limiting part A, and the second side is the side of the second sub-limiting part B. When the brightness decay rate of the first light-emitting color sub-pixel 1111 with the increase of the viewing angle is less than the brightness decay rate of the second light-emitting color sub-pixel 1112 with the increase of the viewing angle, the angle between the first side and the bottom surface of the limiting part 1211 and the angle between the second side and the bottom surface of the limiting part 1211 are different. That is, the angles between the two sides of the limiting part 1211 and the bottom surface are different. Therefore, by adjusting the angles between the two sides of the limiting part 1211 and the bottom surface, the pixels of different light-emitting colors can be controlled to emit light at different degrees and vertically reflect it to the second refractive layer 122 at different viewing angles.

[0042] Furthermore, when the brightness decay rate of the first emitting color sub-pixel 1111 as the viewing angle increases is greater than that of the second emitting color sub-pixel 1112 as the viewing angle increases, the smaller the brightness decay rate of the first emitting color sub-pixel 1111 as the viewing angle increases, the smaller the angle between the first side surface and the bottom surface of the limiting portion 1211. This controls the light emitted by the first emitting color sub-pixel 1111 to be vertically reflected to the second refractive layer 122 at a smaller oblique viewing angle, so that the brightness of the light emitted by the first emitting color sub-pixel 1111 and the second emitting color sub-pixel 1112 at an oblique viewing angle tends to be consistent. The angle between the first side and the bottom surface of the limiting part 1211 and the angle between the second side and the bottom surface of the limiting part 1211 are different. The angle between the first side and the bottom surface of the limiting part 1211 and the angle between the second side and the bottom surface of the limiting part 1211 can be set according to the brightness decay rate of the first light-emitting color sub-pixel 1111 and the second light-emitting color sub-pixel 1112 as the viewing angle increases, so that the brightness of the light emitted by the first light-emitting color sub-pixel 1111 and the second light-emitting color sub-pixel 1112 tends to be consistent under oblique viewing angle.

[0043] Furthermore, the top surface of the limiting part 1211 is an inclined surface; or the top surface of the limiting part 1211 includes a first top surface, a second top surface and a transition connecting surface, the first top surface is the top surface of the first sub-limiting part A, the second top surface is the top surface of the second sub-limiting part B, and the first top surface and the second top surface are connected by the transition connecting surface.

[0044] Specifically, Figure 6 A cross-sectional schematic diagram of a limiting portion provided in an embodiment of the present invention, such as... Figure 6 As shown, the top surface of the limiting part 1211 can be a slope, thereby ensuring that the thicknesses on both sides of the same limiting part 1211 are different, and also reducing the manufacturing difficulty of the limiting part 1211. The limiting part 1211 can also be as follows: Figure 5 As shown, the top surface of the limiting part 1211 includes a first top surface, a second top surface, and a transition connecting surface. The first top surface, the second top surface, and the transition connecting surface are all top surfaces of the limiting part 1211. The first top surface is the top surface of the first sub-limiting part A, and the second top surface is the top surface of the second sub-limiting part B. The first top surface and the second top surface are connected by the transition connecting surface, thereby achieving different thicknesses on both sides of the limiting part 1211.

[0045] Furthermore, the first sub-limiting part A includes a first side surface, and the second sub-limiting part B includes a second side surface; the angle between the first side surface and the bottom surface of the limiting part 1211 and the angle between the second side surface and the bottom surface of the limiting part 1211 are different; wherein, the smaller the brightness decay rate of the first luminous color sub-pixel 1111 as the viewing angle increases, the smaller the angle between the first side surface and the bottom surface of the limiting part 1211.

[0046] Specifically, such as Figure 5As shown, the first side is the side of the first sub-limiting part A, and the second side is the side of the second sub-limiting part B. The angle between the first side and the bottom surface of the limiting part 1211 and the angle between the second side and the bottom surface of the limiting part 1211 are different. That is, the angles between the two sides of the limiting part 1211 and the bottom surface are different. Therefore, by adjusting the angles between the two sides of the limiting part 1211 and the bottom surface, the vertical reflection of light emitted by pixels of different light-emitting colors to the second refractive layer 122 at different degrees at the oblique viewing angle can be controlled. When the brightness decay rate of the first emitting color sub-pixel 1111 as the viewing angle increases is greater than that of the second emitting color sub-pixel 1112 as the viewing angle increases, the smaller the brightness decay rate of the first emitting color sub-pixel 1111 as the viewing angle increases, the smaller the angle between the first side surface and the bottom surface of the limiting part 1211, thereby controlling the light emitted by the first emitting color sub-pixel 1111 to be vertically reflected to the second refractive layer 122 at a smaller oblique viewing angle, so that the brightness of the light emitted by the first emitting color sub-pixel 1111 and the second emitting color sub-pixel 1112 at an oblique viewing angle tends to be consistent. The angle between the first side and the bottom surface of the limiting part 1211 and the angle between the second side and the bottom surface of the limiting part 1211 are different. The angle between the first side and the bottom surface of the limiting part 1211 and the angle between the second side and the bottom surface of the limiting part 1211 can be set according to the brightness decay rate of the first light-emitting color sub-pixel 1111 and the second light-emitting color sub-pixel 1112 as the viewing angle increases, so that the brightness of the light emitted by the first light-emitting color sub-pixel 1111 and the second light-emitting color sub-pixel 1112 tends to be consistent under oblique viewing angle.

[0047] Optionally, the thickness of the limiting part 1211 is 1-4 μm.

[0048] Specifically, the thickness of the limiting portion 1211 is 1-4 μm, and the thickness of the sub-limiting portion in the limiting portion 1211 is also 1-4 μm. The limiting portion 1211 can be obtained by multiple photolithography processes, or it can be achieved by a single photolithography process through photomask design. The photomask design can be such that the transmittance of the photomask varies in different regions, with high transmittance in regions with thicker film and low transmittance in regions with thinner film, thereby achieving the fabrication of the limiting portion 1211.

[0049] Optionally, the refractive index of the first refractive material is between 1.2 and 1.6, and the refractive index of the second refractive material is between 1.6 and 1.9.

[0050] Specifically, the refractive index of the first refractive material is between 1.2 and 1.6, and that of the second refractive material is between 1.6 and 1.9. This ensures that the refractive index of the second refractive material in the second refractive layer 122 is greater than that of the first refractive material in the first refractive layer 121. This allows light from different sub-pixel angles to undergo total internal reflection when passing through the limiting part 1211, thus enabling more light to be vertically reflected by the limiting part 1211 to the second refractive layer 122. This, in turn, accelerates or slows down the brightness decay of a sub-pixel of a certain luminous color.

[0051] Optionally, the display panel may also include a thin-film encapsulation layer located between the pixel layer and the optical path control layer.

[0052] Specifically, the thin-film encapsulation layer is located between the pixel layer and the optical path control layer to protect the pixel layer and serve as an encapsulation material.

[0053] The technical solution of this embodiment, by setting the thickness of the limiting portion above the sub-pixels of different emitting colors to be different, causes at least a portion of the obliquely emitted light from at least one emitting color sub-pixel to be converted into vertically emitted light, thereby changing the brightness attenuation of different sub-pixels. This can accelerate or slow down the brightness attenuation of at least one emitting color sub-pixel with changing viewing angle, thereby reducing the difference in the brightness attenuation rate of different emitting color sub-pixels with changing viewing angle, making the brightness attenuation of different color sub-pixels tend to be consistent, and improving the viewing angle distortion of the display panel.

[0054] This invention also provides a display device, including the display panel described in any of the above embodiments.

[0055] Specifically, the display device provided in this embodiment of the invention includes the display panel proposed in any of the above embodiments, and has the beneficial effects of the display panel proposed in the above embodiments, which will not be repeated here. For example, the display device can be a mobile phone, a wearable device with display function, a computer, or other display devices.

[0056] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, include: A pixel layer, comprising multiple sub-pixels with different emission colors; An optical path control layer is disposed on the light-emitting side of at least some of the sub-pixels in the pixel layer. The optical path control layer includes a first refractive layer and a second refractive layer. The first refractive layer includes a limiting portion and a plurality of openings formed in the limiting portion. The second refractive layer is located on the side of the limiting portion away from the pixel layer and within the openings. The orthogonal projection of at least one emitting color sub-pixel in the optical path control layer is located within the openings. The refractive index of the second refractive material of the second refractive layer is greater than the refractive index of the first refractive material of the first refractive layer.

2. The display panel according to claim 1, characterized in that, The limiting portion includes a top surface away from the pixel layer and a bottom surface close to the pixel layer; between adjacent openings, the area of ​​the top surface of the limiting portion is smaller than the area of ​​the bottom surface; the area of ​​the top surface of the opening is larger than the area of ​​the bottom surface of the opening.

3. The display panel according to claim 2, characterized in that, The limiting portion further includes a side surface connecting the top surface and the bottom surface, the side surface being used to vertically incident at least a portion of the light emitted by the sub-pixel of at least one luminous color onto the second refractive layer after total internal reflection, the at least a portion of the light including light emitted along a set direction, the set direction intersecting the direction of the light emitted vertically from the sub-pixel.

4. The display panel according to claim 3, characterized in that, The angle between the side surface and the bottom surface is less than 90 degrees, so that light emitted by the sub-pixel of at least one luminous color in a predetermined direction undergoes total internal reflection on the side surface.

5. The display panel according to claim 1, characterized in that, The sub-pixel includes a first emitting color sub-pixel and a second emitting color sub-pixel. The vertical projection of the defining portion on the pixel layer is at least partially located between the first emitting color sub-pixel and the second emitting color sub-pixel. The defining portion includes a first sub-defining portion and a second sub-defining portion. Along the line connecting the first emitting color sub-pixel and the second emitting color sub-pixel, the first sub-defining portion is closer to the first emitting color sub-pixel than the second sub-defining portion. The first sub-defining portion includes a first side surface away from the second sub-defining portion, and the second sub-defining portion includes a second side surface away from the first sub-defining portion. When the brightness decay rate of the first emitting color sub-pixel with increasing viewing angle is less than that of the second emitting color sub-pixel with increasing viewing angle, the thickness of the first sub-limiting portion is greater than the thickness of the second sub-limiting portion, or the angle between the first side surface and the bottom surface of the limiting portion is less than the angle between the second side surface and the bottom surface of the limiting portion; wherein, the smaller the brightness decay rate of the first emitting color sub-pixel with increasing viewing angle, the smaller the angle between the first side surface and the bottom surface of the limiting portion.

6. The display panel according to claim 5, characterized in that, The top surface of the limiting part is an inclined surface; Alternatively, the top surface of the limiting portion may include a first top surface, a second top surface, and a transition connecting surface, wherein the first top surface is the top surface of the first sub-limiting portion, the second top surface is the top surface of the second sub-limiting portion, and the first top surface and the second top surface are connected by the transition connecting surface.

7. The display panel according to claim 1, characterized in that, The thickness of the limiting part is 1-4 μm.

8. The display panel according to claim 1, characterized in that, The refractive index of the first refractive material is between 1.2 and 1.6, and the refractive index of the second refractive material is between 1.6 and 1.

9.

9. The display panel according to any one of claims 1-8, characterized in that, It also includes a thin-film encapsulation layer, which is located between the pixel layer and the optical path control layer.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

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