Display panel and display device

Abstract

The invention relates to a display panel which comprises negative lenses, an arc-shaped concave surface which is recessed in the direction away from an array substrate is formed on one surface, close to the array substrate, of each negative lens, one surface, away from the array substrate, of each negative lens is a plane, and each positive lens is arranged on the plane of the corresponding negative lens. As the abbe number of the positive lens is larger than that of the negative lens, the focal power of the positive lens and the focal power of the negative lens can be changed by adjusting the radius of the positive lens and the radius of the negative lens, the hue is further reduced, and the color cast problem of the display panel can be avoided. The invention further provides a display device comprising the display panel.

Description

Technical Field

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

[0002] To reduce the contrast degradation of the display panel, a polarizing layer can be placed on the side of the pixel layer away from the array substrate. However, this will reduce the light extraction efficiency of the display panel. To overcome this problem, an optical path control layer is usually set up.

[0003] The optical path control layer typically includes a positive lens and a planarization layer. When light of different wavelengths passes through the interface between the positive lens and the planarization layer, the refraction angles are different, which can cause color distortion on the display panel at large angles.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of optical attenuation and color distortion of display panels at large angles, and to provide a display panel and display device.

[0006] According to one aspect of the present invention, a display panel is provided, which may include an array substrate, a pixel definition layer, at least three different colored light-emitting devices, and an optical path control layer. The pixel definition layer is disposed on the driving side of the array substrate and has a plurality of pixel openings. The at least three different colored light-emitting devices are respectively disposed in different pixel openings. The optical path control layer is disposed on the side of the pixel layer away from the array substrate and includes a first cover layer, a first microlens layer, a second microlens layer, and a second cover layer. The first cover layer includes a plurality of first arc-shaped protrusions spaced apart, and the first microlens layer includes a plurality of negative lenses, each negative lens respectively covering... The first arc-shaped protrusion is covered by a negative lens. The side of the negative lens near the array substrate forms an arc-shaped concave surface that is recessed in the direction away from the array substrate. The side of the negative lens away from the array substrate is a flat surface. The second microlens layer includes a plurality of positive lenses spaced apart. Each positive lens is disposed on the flat surface of each negative lens. The side of the positive lens away from the array substrate is an arc-shaped convex surface that protrudes in the direction away from the array substrate. The second cover layer fills the space between adjacent positive lenses and covers the side of the positive lens away from the array substrate. The orthogonal projections of the positive and negative lenses on the array substrate overlap with the orthogonal projections of the light-emitting device on the array substrate. The Abbe number of the positive lens is greater than that of the negative lens.

[0007] In one embodiment of the present invention, the chromatic aberration correction formula for the optical path control layer is as follows: = 1 + 2; = (n-1)(1 / R1+1 / R2) = 1 / f; Chromatic = 1 / v1 + 2 / v2; in: This represents the total optical power of the positive and negative lenses. 1 represents the optical power of a positive lens. 2 is the optical power of the negative lens, n is the refractive index of the positive lens or the negative lens, R1 is the radius of curvature of the positive lens, R2 is the radius of curvature of the negative lens, f is the distance between the light-emitting device and the optical path control layer, chromatic is the hue, v1 is the Abbe number of the positive lens, v2 is the Abbe number of the negative lens, and v1 is greater than v2.

[0008] In one embodiment of the present invention, the display panel further includes a brightness enhancement layer disposed between the light path control layer and the pixel layer. The materials of the first cover layer and the second cover layer are of a first type of material, and the materials of the first microlens layer and the second microlens layer are of a second type of material. The refractive index of the first material is less than that of the second material.

[0009] In one embodiment of the present invention, a filling portion is provided between two adjacent negative lenses, and a second cover layer covers the side of the filling portion away from the array substrate. The filling portion is made of the same layer and material as the negative lenses.

[0010] In one embodiment of the present invention, a light-shielding part is provided between two adjacent negative lenses, and a pixel definition part is provided between two adjacent pixel openings. The orthogonal projection of the light-shielding part on the array substrate is located within the orthogonal projection of the pixel definition part on the array substrate.

[0011] In one embodiment of the present invention, the light-emitting device includes a first light-emitting device, a second light-emitting device, and a third light-emitting device, wherein the first light-emitting device is red, the second light-emitting device is green, and the third light-emitting device is blue.

[0012] In one embodiment of the present invention, the display panel includes m×n groups of light-emitting devices, the m groups of light-emitting devices extending along a first direction and arranged along a second direction, the n groups of light-emitting devices extending along the second direction and arranged along the first direction, the light-emitting devices of the same m group are divided into two rows, the two rows of light-emitting devices are arranged alternately, wherein one row of light-emitting devices consists of alternating first light-emitting devices and third light-emitting devices, and the other row consists of second light-emitting devices, the second light-emitting devices being located between the first light-emitting devices and the third light-emitting devices along the first direction; the light-emitting devices of the same n group are divided into two columns, the two columns of light-emitting devices are arranged alternately, one column of light-emitting devices consists of alternating first light-emitting devices and third light-emitting devices, and the other column consists of second light-emitting devices, the second light-emitting devices being located between the first light-emitting devices and the third light-emitting devices along the second direction.

[0013] In one embodiment of the present invention, the display panel further includes a polarizing layer disposed on the side of the optical path control layer away from the array substrate.

[0014] In one embodiment of the present invention, the display panel further includes an encapsulation layer disposed between the pixel layer and the brightness enhancement layer.

[0015] According to another aspect of the present invention, a display device is provided, comprising a display panel provided in one aspect of the present invention.

[0016] The display panel of the present invention includes a negative lens. The side of the negative lens near the array substrate forms an arc-shaped concave surface that is recessed in the direction away from the array substrate. The side of the negative lens away from the array substrate is a plane. Each positive lens is disposed on the plane of the negative lens. Since the Abbe number of the positive lens is greater than that of the negative lens, by adjusting the radius of the positive lens and the radius of the negative lens, the optical power of the positive lens and the optical power of the negative lens can be changed, thereby reducing the hue and avoiding color shift problems in the display panel.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 A schematic diagram illustrating the principle of improving the light extraction efficiency of the display panel in this embodiment of the invention when a light enhancement layer is provided on the side of the polarizing layer close to the array substrate.

[0020] Figure 2This is a schematic diagram illustrating the different refraction angles of light of different wavelengths as it passes through the interface between the positive lens and the planarization layer, according to an embodiment of the present invention.

[0021] Figure 3 A cross-sectional schematic diagram of the display panel according to an embodiment of the present invention, wherein each positive lens is disposed on the plane of each negative lens.

[0022] Figure 4 This is a planar schematic diagram showing the distribution of different color light-emitting devices in an embodiment of the present invention.

[0023] Figure 5 for Figure 3 A partial cross-sectional schematic diagram of the optical path control layer.

[0024] Figure 6 for Figure 3 A schematic diagram of the planar distribution of the positive lens and the second cover layer.

[0025] Figure 7 for Figure 3 A schematic diagram of the optical path dispersion of light rays from the light-emitting device at the forward viewing angle by the optical path modulation layer.

[0026] Figure 8 A cross-sectional schematic diagram of a display panel according to an embodiment of the present invention, wherein the second cover layer is filled between two adjacent negative lenses.

[0027] Figure 9 A cross-sectional schematic diagram of the display panel according to an embodiment of the present invention, wherein a light-shielding portion is provided between two adjacent negative lenses.

[0028] Figure 10 This is a cross-sectional schematic diagram of the display panel involved in the embodiment of the present invention, where the optical path control layer consists only of a positive lens and a planarization layer, and the side of the positive lens away from the array substrate is an arc-shaped convex surface.

[0029] Figure 11 A cross-sectional schematic diagram of the display panel involved in this embodiment of the invention, wherein the optical path control layer consists only of a positive lens and a planarization layer, and the three-dimensional shape of the positive lens is pyramidal.

[0030] Figure 12 for Figure 11 A schematic diagram showing the distribution of multiple positive lenses.

[0031] Figure 13 This is a curve showing the relationship between the brightness of different colors of emitted light and the viewing angle when no optical path control layer is added.

[0032] Figure 14 To add Figure 3 The curve showing the relationship between the brightness of different colors of emitted light and the viewing angle in the optical path control layer.

[0033] Figure 15 To add Figure 10 The curve showing the relationship between the brightness of different colors of emitted light and the viewing angle in the optical path control layer.

[0034] Figure 16 To add Figure 11 The curve showing the relationship between the brightness of different colors of emitted light and the viewing angle in the optical path control layer.

[0035] In the figure: 1-array substrate, 2-pixel layer, 21-pixel definition layer, 211-pixel opening, 212-pixel definition part, 22-light-emitting device, 221-first light-emitting device, 222-second light-emitting device, 223-third light-emitting device, 2201-pixel electrode, 2202-light-emitting material layer, 2203-common electrode, 3-encapsulation layer, 4-brightness enhancement layer, 5-optical path control layer, 51-first cover layer, 511-first arc-shaped protrusion, 52-first microlens layer, 521-negative lens, 522-filling part, 523-light-shielding part, 53-second microlens layer, 531-positive lens, 54-second cover layer, 55-planarization layer, 6-polarizing layer, 61-polarizer, 62-quarter-wave plate. Detailed Implementation

[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted. Furthermore, the drawings are merely illustrative of the invention and are not necessarily drawn to scale.

[0037] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples in the accompanying drawings. It is understood that if the device of the icon is flipped so that it is upside down, the component described as "upper" will become the component described as "lower." When a structure is "upper" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0038] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0039] The metal layer of the display panel reflects incident ambient light, severely reducing the contrast of the displayed image and thus requiring higher display brightness, which leads to a decrease in the efficiency of the light-emitting device 22. Therefore, a polarizing layer 6 is provided on the side of the light-emitting device 22 away from the array substrate 1. The polarizing layer 6 may include a polarizer 61 and a quarter-wave plate 62. By filtering ambient light and reflected ambient light through the polarizing layer 6, the problem of decreased display contrast can be greatly reduced. However, this structure also blocks the emitted light from the light-emitting device 22, resulting in a decrease in light extraction efficiency and an increase in the energy consumption of the display panel.

[0040] To reduce the power consumption of the display panel, a brightness enhancement layer 4 is disposed on the side of the polarizing layer 6 closest to the array substrate 1. The brightness enhancement layer 4 is a cholesteric liquid crystal (CLC). The specific principle is as follows: Figure 1 As shown, the emitted light from the light-emitting device 22 becomes circularly polarized after passing through the brightness enhancement layer 4. The amount of light emitted after the first filtering is 50% of the incident light. Part of the light is reflected by the brightness enhancement layer 4 and enters the light-emitting device 22 and the array substrate 1. After multiple reflections by the metal layer, it is emitted again from the brightness enhancement layer 4. The amount of light emitted after the second filtering is 35%-40% of the reflected light. It can be understood that the final amount of light emitted is: 50%×(L+Re), where L is the light emission of the light-emitting device 22 and Re is the reflection of the metal layer. The brightness enhancement layer 4 increases the positive viewing angle by reflecting the emitted light from the light-emitting device 22 multiple times or by focusing the emitted light from the light-emitting device 22, thereby improving the extraction efficiency of the positive light.

[0041] However, the addition of the fourth brightness enhancement layer causes significant optical attenuation of the display panel at large viewing angles. For example... Figure 2 As shown, in order to reduce the optical attenuation of the display panel at a wide viewing angle, an optical path control layer 5 is usually provided on the side of the light-emitting device 22 away from the array substrate 1. The optical path control layer 5 usually includes multiple positive lenses 531 and a planarization layer 55 distributed at intervals. The planarization layer 55 fills between different positive lenses 531 and covers the side of the positive lenses 531 away from the array substrate 1. Light of different wavelengths is refracted at different angles when passing through the interface between the positive lens 531 and the planarization layer 55, resulting in color distortion of the display panel at a wide viewing angle.

[0042] Based on this, embodiments of the present invention provide a display panel. For example... Figures 3 to 16As shown, the display panel may include an array substrate 1, a pixel layer 2, and an optical path control layer 5. The pixel layer 2 includes a pixel definition layer 21 and at least three different colored light-emitting devices 22. The pixel definition layer 21 is located on the driving side of the array substrate 1 and has multiple pixel openings 211. Different colored light-emitting devices 22 are respectively disposed in different pixel openings 211. The optical path control layer 5 is located on the side of the pixel layer 2 away from the array substrate 1. The optical path control layer 5 includes a first cover layer 51, a first microlens layer 52, a second microlens layer 53, and a second cover layer 54. The first cover layer 51 includes multiple first arc-shaped protrusions 511 spaced apart. The first microlens layer 52 includes multiple negative lenses 521, each negative lens 521 covering each first arc-shaped protrusion 511. 11. The negative lens 521 has an arc-shaped concave surface on the side near the array substrate 1 that is recessed in the direction away from the array substrate 1. The side of the negative lens 521 away from the array substrate 1 is a plane. The second microlens layer 53 includes a plurality of positive lenses 531 arranged at intervals. Each positive lens 531 is respectively disposed on the plane of each negative lens 521. The side of the positive lens 531 away from the array substrate 1 is an arc-shaped convex surface that protrudes in the direction away from the array substrate 1. The second cover layer 54 fills between adjacent positive lenses 531 and covers the side of the positive lens 531 away from the array substrate 1. The orthogonal projections of the positive lens 531 and the negative lens 521 on the array substrate 1 overlap with the orthogonal projection of the light-emitting device 22 on the array substrate 1. The Abbe number of the positive lens 531 is greater than that of the negative lens 521.

[0043] The optical path control layer 5 includes a negative lens 521. The side of the negative lens 521 closest to the array substrate 1 forms an arc-shaped concave surface that is recessed in the direction away from the array substrate 1. The side of the negative lens 521 away from the array substrate is a plane. Each positive lens 531 is respectively disposed on the plane of each negative lens 521. Since the Abbe number of the positive lens 531 is greater than that of the negative lens 521, by adjusting the radius of the positive lens 531 and the radius of the negative lens 521, the optical power of the positive lens 531 and the optical power of the negative lens 521 can be changed, thereby reducing the hue and avoiding color shift problems in the display panel.

[0044] The display panel involved in this invention will now be described in detail with reference to specific embodiments.

[0045] like Figure 3As shown, the display panel may include an array substrate 1, a pixel layer 2, and an encapsulation layer 3. The pixel layer 2 includes a pixel definition layer 21 and multiple light-emitting devices 22. The pixel definition layer 21 is disposed on the driving side of the array substrate 1 and has multiple pixel openings 211. The multiple light-emitting devices 22 are respectively disposed in different pixel openings 211. Each light-emitting device 22 includes a pixel electrode 2201, a light-emitting material layer 2202, and a common electrode 2203. The pixel electrode 2201 is disposed in the pixel opening 211, the light-emitting material layer 2202 is disposed on the side of the pixel electrode 2201 away from the array substrate 1, and the common electrode 2203 is disposed on the side of the light-emitting material layer 2202 away from the array substrate 1. The encapsulation layer 3 is disposed on the side of the common electrode 2203 away from the array substrate 1.

[0046] like Figure 4 As shown, the light-emitting device 22 includes three different colored light-emitting devices 22, namely the first light-emitting device 221, the second light-emitting device 222 and the third light-emitting device 223. The first light-emitting device 221 is red, the second light-emitting device 222 is green and the third light-emitting device 223 is blue. The display panel includes m×n groups of light-emitting devices 22. The m groups of light-emitting devices 22 extend along a first direction and are arranged along a second direction. The n groups of light-emitting devices 22 extend along the second direction and are arranged along the first direction. The same m groups of light-emitting devices 22 are divided into two rows, which are staggered. One row consists of alternating first light-emitting devices 221 and third light-emitting devices 223, while the other row consists of second light-emitting devices 222, which are located between the first light-emitting devices 221 and third light-emitting devices 223 along the first direction. The same n groups of light-emitting devices 22 are divided into two columns, which are staggered. One column consists of alternating first light-emitting devices 221 and third light-emitting devices 223, while the other column consists of second light-emitting devices 222, which are located between the first light-emitting devices 221 and third light-emitting devices 223 along the second direction. It should be noted that the first direction is... Figure 4 The x-direction in the middle, the second direction is Figure 4 y direction in .

[0047] To improve the contrast of the displayed image, the display panel may also include a polarizing layer 6, which is disposed on the side of the pixel layer 2 away from the array substrate 1, to mitigate the decrease in light extraction efficiency caused by the polarizing layer 6. The display panel may also include a brightness enhancement layer 4, which is disposed between the encapsulation layer 3 and the polarizing layer 6. The principle of brightness enhancement is described in [reference needed]. Figure 1 And its explanation. In order to reduce the optical attenuation of the display panel at a wide viewing angle, an optical path control layer 5 can be set between the light enhancement layer 4 and the polarization layer 6, with the polarization layer 6 located on the side of the optical path control layer 5 away from the array substrate 1.

[0048] like Figure 5 As shown, the optical path control layer 5 may include a first cover layer 51, a first microlens layer 52, a second microlens layer 53, and a second cover layer 54. The first cover layer 51 includes a plurality of first arc-shaped protrusions 511 spaced apart. The first microlens layer 52 includes a plurality of negative lenses 521, each negative lens 521 covering each of the first arc-shaped protrusions 511. The side of the negative lens 521 near the array substrate 1 forms an arc-shaped concave surface that is recessed in the direction away from the array substrate 1, and the side of the negative lens 521 away from the array substrate 1 is a plane. The second microlens layer 53 includes a plurality of positive lenses 531 spaced apart, each positive lens 531 being disposed on the plane of each negative lens 521. The side of the positive lens 531 away from the array substrate 1 is an arc-shaped convex surface that protrudes in the direction away from the array substrate 1. The second cover layer 54 fills the spaces between adjacent positive lenses 531 and covers the side of the positive lens 531 away from the array substrate 1. Figure 6 As shown, multiple positive lenses 531 are spaced apart, and a second cover layer 54 fills the spaces between adjacent positive lenses 531. It should be noted that the orthogonal projections of the positive lenses 531 and negative lenses 521 onto the array substrate 1 overlap with the orthogonal projections of the light-emitting device 22 onto the array substrate 1.

[0049] The materials of the first capping layer 51 and the second capping layer 54 are of a first type, while the materials of the first microlens layer 52 and the second microlens layer 53 are of a second type. The refractive index of the first material is less than that of the second material. Figure 7 As shown, after the light emitted from the light-emitting device 22 passes through the first interface formed between the first arc-shaped protrusion 511 and the arc-shaped concave surface of the negative lens 521, it can be refracted in a direction closer to the axis of the positive lens 531. After the refracted light enters the second interface formed between the arc-shaped convex surface of the positive lens 531 and the second cover layer 54, it deflects in a direction away from the axis of the positive lens 531, thereby dispersing the light from the light-emitting device 22 at a certain angle and balancing the brightness at the positive angle and the large angle, thus reducing energy consumption and reducing brightness attenuation at the large angle.

[0050] The chromatic aberration correction formula for optical path control layer 5 is as follows: = 1 + twenty one); = (n-1)(1 / R1+1 / R2) = 1 / f 2); Chromatic = 1 / v1 + 2 / v2; 3); v=(nd-1) / (nF-nC) 4); in: This represents the total optical power of the positive lens 531 and the negative lens 521. 1 represents the optical power of a 531-pole positive lens. 2 is the optical power of the negative lens 521, R1 is the radius of curvature of the positive lens 531, R2 is the radius of curvature of the negative lens 521, f is the distance between the light-emitting device 22 and the optical path control layer 5, Chromatic is the hue, v1 is the Abbe number of the positive lens 531, v2 is the Abbe number of the negative lens 521, and v1 is greater than v2.

[0051] nd is the refractive index of sodium yellow light, nF is the refractive index of hydrogen blue light, and nC is the refractive index of hydrogen red light. It should be noted that, using formula 2) above, the distance between the side of the light-emitting device 22 furthest from the array substrate 1 and the side of the light path control layer 5 closest to the array substrate 1 can be calculated to be approximately 0.0002 mm. The wavelength of sodium yellow light is 587.6 nm, the wavelength of hydrogen blue light is 486.1 nm, and the wavelength of hydrogen red light is 656.3 nm. These wavelengths can be calculated using formula 4) above, along with v2. To eliminate chromatic aberration, Chromatic can be set to 0.

[0052] The negative lens 521 is made of a different material than the positive lens 531, therefore the Abbe number of the negative lens 521 is different from that of the positive lens 531. In this embodiment, the Abbe number of the negative lens 521 is less than 50, and the material of the negative lens 521 can be flint glass; the Abbe number of the positive lens 531 is greater than 55, and the material of the positive lens 531 can be crown glass. By adjusting the radius of the positive lens 531 and the radius of the negative lens 521, the optical power of the positive lens 531 and the optical power of the negative lens 521 can be changed. When the Abbe numbers of the positive lens 531 and the negative lens 521 are determined, the hue can be reduced, thereby reducing or eliminating color shift at large viewing angles. In this embodiment, the radius of the positive lens 531 can be adjusted by adjusting the thickness of the positive lens 531, and the radius of the negative lens 521 can be adjusted by adjusting the thickness of the negative lens 521.

[0053] like Figure 3 As shown, a filling portion 522 is provided between two adjacent negative lenses 521, and a second cover layer 54 covers the side of the filling portion 522 away from the array substrate 1. The filling portion 522 is disposed in the same layer and made of the same material as the negative lens 521. Figure 8 As shown, in other embodiments, the second cover layer 54 may also be filled between two adjacent negative lenses 521.

[0054] like Figure 9As shown, a light-shielding portion 523 can also be provided between two adjacent negative lenses 521, and a pixel definition portion 212 can be provided between two adjacent pixel openings 211. The orthogonal projection of the light-shielding portion 523 on the array substrate 1 is located within the orthogonal projection of the pixel definition portion 212 on the array substrate 1. The light-shielding portion 523 can filter out reflected light from a wide viewing angle and prevent reflected light from escaping between two adjacent negative lenses 521, so that the display panel has a better dark-state integrated black effect.

[0055] like Figure 10 As shown, with Figure 9 The difference lies in that the optical path adjustment layer 5 only includes a positive lens 531 and a planarization layer 55. The side of the positive lens 531 away from the array substrate 1 is a curved convex surface. The planarization layer 55 fills the spaces between the positive lenses 531 and covers the curved convex surface of the positive lenses 531 away from the array substrate 1. The refractive index of the planarization layer 55 is greater than that of the positive lens 531. The refraction angle can be calculated according to sini / sinγ=n2 / n1, where i is the incident angle, γ is the refraction angle, n1 is the refractive index of the incident medium, and n2 is the refractive index of the refractive medium. The refractive index of the planarization layer 55 is 1.95-2.0, and the refractive index of the positive lens 531 is 1.40-1.45. The relative refractive index of the planarization layer 55 and the positive lens 531 is 1.35-1.45, which can meet the refractive requirements of the optical path adjustment layer and improve the light extraction efficiency at the positive viewing angle.

[0056] like Figure 11 and Figure 12 As shown, with Figure 10 The difference lies in the fact that the three-dimensional shape of the positive lens 531 is pyramidal, and there is no gap between two adjacent positive lenses 531. For example... Figure 11 As shown, the cross-sectional shape of the positive lens 531 is triangular. The refraction angle can be calculated using the formula sini / sinγ=n2 / n1, where i is the incident angle, γ is the refraction angle, n1 is the refractive index of the incident medium, and n2 is the refractive index of the refractive medium. The refractive index of the planarization layer 55 is 1.95-2.0, and the refractive index of the positive lens 531 is 1.40-1.45. The relative refractive index between the planarization layer 55 and the positive lens 531 is 1.35-1.45, which can meet the refractive requirements of the optical path layer and improve the light extraction efficiency at the positive viewing angle.

[0057] like Figures 13 to 16 As shown, S1 represents the relationship curve between the brightness of the emitted light from the first light-emitting device 221 and the viewing angle, S2 represents the relationship curve between the brightness of the emitted light from the second light-emitting device 222 and the viewing angle, and S3 represents the relationship curve between the brightness of the emitted light from the third light-emitting device 223 and the viewing angle. Figure 13 The curves show the relationship between the brightness of different colors of emitted light and the viewing angle when the optical path control layer 5 is not added. Figure 14 To add Figure 3 The curves showing the relationship between the brightness of different colors of emitted light and the viewing angle at the optical path control layer 5. Figure 15 To add Figure 10 The curves showing the relationship between the brightness of different colors of emitted light and the viewing angle at the optical path control layer 5. Figure 16 To add Figure 11 The curves showing the relationship between the brightness of different colors of emitted light and the viewing angle at the optical path control layer 5.

[0058] contrast Figure 13 and Figure 14 It can be observed that adding Figure 3 After the optical path modulation layer 5 is applied, the optical attenuation of the display panel at both wide and narrow viewing angles is significantly reduced, and color shift is noticeably improved. (Comparison) Figure 13 and Figure 15 It can be observed that adding Figure 10 After the optical path modulation layer 5 is applied, the optical attenuation at small viewing angles is significantly improved, and the light extraction efficiency is increased. However, large-angle color shift occurs. (Comparison) Figure 13 and Figure 16 It can be observed that adding Figure 11 After the optical path modulation layer 5, it can be seen that the improvement in optical attenuation at small viewing angles is small, the improvement in light extraction efficiency is limited, and the color shift is more obvious. Therefore, Figure 3 The display panel in this system demonstrates significant effectiveness in reducing optical attenuation at wide viewing angles and improving color shift. Understandably, Figure 3 Compared to the display panel in the middle Figure 10 and Figure 11 The display panel in it has a significant advantage.

[0059] This invention also provides a display device, which may include the display panel mentioned above in this invention. The specific structure and beneficial effects of the display panel have been described in detail above, and therefore will not be repeated here.

[0060] It should be noted that, in addition to the display panel, the display device also includes other necessary components and parts, such as the casing, circuit board, power cord, etc. Those skilled in the art can make corresponding additions according to the specific usage requirements of the display device, which will not be elaborated here.

[0061] Display devices can be traditional electronic devices, such as mobile phones, computers, televisions, and video recorders, or emerging wearable devices, such as virtual reality devices and augmented reality devices, which will not be listed here.

[0062] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the appended claims.

Claims

1. A display panel, characterized by, include: Array substrate; A pixel layer, including a pixel definition layer and at least three different colored light-emitting devices, is disposed on the driving side of the array substrate. The pixel definition layer has multiple pixel openings, and different colored light-emitting devices are disposed in different pixel openings. An optical path control layer is disposed on the side of the pixel layer away from the array substrate. The optical path control layer includes a first cover layer, a first microlens layer, a second microlens layer, and a second cover layer. The first cover layer includes a plurality of first arc-shaped protrusions spaced apart. The first microlens layer includes a plurality of negative lenses, each of which covers each of the first arc-shaped protrusions. The side of the negative lens near the array substrate forms an arc-shaped concave surface that is recessed in the direction away from the array substrate. The side of the negative lens away from the array substrate is a plane. The second microlens layer includes a plurality of positive lenses spaced apart. Each of the positive lenses is disposed on the plane of each of the negative lenses. The side of the positive lens away from the array substrate is an arc-shaped convex surface that protrudes in the direction away from the array substrate. The second cover layer fills the spaces between adjacent positive lenses and covers the side of the positive lens away from the array substrate. The orthogonal projections of the positive lenses and the negative lenses on the array substrate overlap with the orthogonal projections of the light-emitting device on the array substrate. The Abbe number of the positive lenses is greater than the Abbe number of the negative lenses.

2. The display panel of claim 1, wherein, The chromatic aberration correction formula for the optical path control layer is as follows: = 1 + 2； = (n - 1)(1 / R1+1 / R2) = 1 / f; Chromatic = 1 / v1 + 2 / v2; wherein: D is the total optical power of the positive lens and the negative lens, 1 is the optical power of the positive lens, 2 is the optical power of the negative lens, n is the refractive index of the positive lens or the refractive index of the negative lens, R1 is the radius of curvature of the positive lens, R2 is the radius of curvature of the negative lens, f is the distance between the light-emitting device and the light path regulation layer, Chromatic is the color phase, v1 is the Abbe number of the positive lens, v2 is the Abbe number of the negative lens, and v1 is greater than v2.

3. The display panel according to claim 1, characterized in that, The display panel further includes a brightness enhancement layer, which is disposed between the optical path control layer and the pixel layer. The materials of the first cover layer and the second cover layer are of a first type, and the materials of the first microlens layer and the second microlens layer are of a second type. The refractive index of the first type of material is less than that of the second type of material.

4. The display panel according to claim 1, characterized in that, A filling portion is provided between two adjacent negative lenses, and the second cover layer covers the side of the filling portion away from the array substrate. The filling portion is made of the same layer and material as the negative lens.

5. The display panel according to claim 1, characterized in that, A light-shielding portion is provided between two adjacent negative lenses, and a pixel definition portion is provided between two adjacent pixel openings. The orthogonal projection of the light-shielding portion on the array substrate is located within the orthogonal projection of the pixel definition portion on the array substrate.

6. The display panel according to claim 1, characterized in that, The light-emitting device includes a first light-emitting device, a second light-emitting device, and a third light-emitting device. The first light-emitting device is red, the second light-emitting device is green, and the third light-emitting device is blue.

7. The display panel according to claim 6, characterized in that, The display panel includes m×n groups of light-emitting devices. The m groups of light-emitting devices extend along a first direction and are arranged along a second direction. The n groups of light-emitting devices extend along the second direction and are arranged along the first direction. The light-emitting devices in the same m group are divided into two rows, which are arranged alternately. One row consists of alternating first and third light-emitting devices, and the other row consists of second light-emitting devices, which are located between the first and third light-emitting devices along the first direction. The light-emitting devices in the same n group are divided into two columns, which are arranged alternately. One column consists of alternating first and third light-emitting devices, and the other column consists of second light-emitting devices, which are located between the first and third light-emitting devices along the second direction.

8. The display panel according to claim 3, characterized in that, The display panel further includes a polarizing layer, which is disposed on the side of the optical path control layer away from the array substrate.

9. The display panel according to claim 3, characterized in that, The display panel further includes an encapsulation layer, which is disposed between the pixel layer and the brightness enhancement layer.

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

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