Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes a substrate, and a plurality of sub-pixels and a plurality of microlenses sequentially located on one side of the substrate. The plurality of sub-pixels include a first sub-pixel and a second sub-pixel, wherein the perimeter-area ratio of the first sub-pixel is greater than the perimeter-area ratio of the second sub-pixel. The plurality of microlenses include a first microlens and a second microlens. The vertical projection of the first microlens on the substrate covers the first sub-pixel, and the edge of the vertical projection of the first sub-pixel on the substrate is separated from the edge of the vertical projection of the first microlens on the substrate by a first distance along a first direction. The vertical projection of the second microlens on the substrate covers the second sub-pixel, and the edge of the vertical projection of the second sub-pixel on the substrate is separated from the edge of the vertical projection of the second microlens on the substrate by a second distance along the first direction. The number density of the first microlenses is less than the number density of the second microlenses, and / or the first distance is greater than the second distance. By differentially arranging the microlenses, the problem of display color shift is solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the continuous development of science and technology, more and more electronic devices are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today.

[0003] Display panels are the primary components of electronic devices, and organic light-emitting diode (OLED) display panels are currently one of the mainstream display panels. In existing OLED panels, sub-pixels of different luminous colors vary in degree with viewing angle, resulting in different brightness attenuation and poor display quality. Summary of the Invention

[0004] The present invention provides a display panel and a display device, which reduce the color trajectory deviation problem of the display panel caused by the different brightness attenuation of sub-pixels of different luminous colors by differentially arranging microlenses on the light-emitting side of sub-pixels, thereby solving the display color shift problem.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0006] substrate;

[0007] a plurality of sub-pixels located on one side of the substrate, including a first sub-pixel and a second sub-pixel, wherein a perimeter-to-area ratio of the first sub-pixel is greater than a perimeter-to-area ratio of the second sub-pixel; the perimeter-to-area ratio being a ratio of a perimeter of the sub-pixel projected perpendicularly in a direction toward the substrate to an area;

[0008] a plurality of microlenses, located on a side of the plurality of sub-pixels away from the substrate, including a first microlens and a second microlens;

[0009] The vertical projection of the first sub-pixel on the substrate is located within the vertical projection of the first micro-lens on the substrate, and an edge of the vertical projection of the first sub-pixel on the substrate is spaced a first distance away from an edge of the vertical projection of the first micro-lens on the substrate along a first direction; the vertical projection of the second sub-pixel on the substrate is located within the vertical projection of the second micro-lens on the substrate, and an edge of the vertical projection of the second sub-pixel on the substrate is spaced a second distance away from an edge of the vertical projection of the second micro-lens on the substrate along the first direction;

[0010] The number density of the first microlenses is smaller than the number density of the second microlenses, and / or the first distance is larger than the second distance.

[0011] In a second aspect, an embodiment of the present invention further provides a display device, and the display device also includes the display panel provided in the first aspect.

[0012] A display panel provided by an embodiment of the present invention includes a substrate, and a plurality of sub-pixels and a plurality of microlenses sequentially located on one side of the substrate. The plurality of sub-pixels include a first sub-pixel and a second sub-pixel, and the perimeter area ratio of the first sub-pixel is greater than the perimeter area ratio of the second sub-pixel. The plurality of microlenses include a first microlens and a second microlens. The vertical projection of the first microlens on the substrate covers the first sub-pixel, and the edge of the vertical projection of the first sub-pixel on the substrate is separated from the edge of the vertical projection of the first microlens on the substrate by a first distance along a first direction. The vertical projection of the second microlens on the substrate covers the second sub-pixel, and the edge of the vertical projection of the second sub-pixel on the substrate is separated from the edge of the vertical projection of the second microlens on the substrate by a second distance along the first direction. The number density of the first microlenses is less than the number density of the second microlenses, and / or the first distance is greater than the second distance. Microlenses are provided on the light-emitting sides of at least some of the sub-pixels, and the microlenses on the light-emitting sides of the sub-pixels are differentiated according to the structural characteristics of the sub-pixels. This ensures that the brightness of sub-pixels of different light-emitting colors at the same viewing angle decays at the same or approximately the same rate as the viewing angle changes, thereby reducing the color trajectory offset problem of the display panel caused by the different brightness decays of sub-pixels of different light-emitting colors, thereby solving the display color cast problem, improving the display effect of the display panel, and reducing the power consumption of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a display panel provided by the related art;

[0014] Figure 2 is a structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0015] Figure 3 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0016] Figure 4 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0017] Figure 5 yes Figure 3 A schematic cross-sectional view along the AA' direction;

[0018] Figure 6 is a chromaticity locus diagram of a display panel provided by an embodiment of the present invention;

[0019] Figure 7 yes Figure 4 A schematic cross-sectional view along the EE' direction;

[0020] Figure 8 This is a graph showing the relationship between the efficiency improvement ratio of a sub-pixel and the distance from the micro-lens provided by an embodiment of the present invention;

[0021] Figure 9 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0022] Figure 10 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0023] Figure 11 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0025] Figure 1 This is a schematic diagram of the structure of a display panel provided by the related technology. Figure 1 As shown, a display panel 100 in the related art includes a substrate 10 and a plurality of sub-pixels 11 sequentially located on one side of the substrate 10. In the prior art, due to the differences in the sizes of the sub-pixels 11 of different luminous colors, at the same viewing angle, the brightness of the sub-pixels 11 of different luminous colors decays at different rates as the viewing angle changes, which can easily lead to the offset of the color trajectory of the OLED panel and cause the problem of display color deviation.

[0026] Based on the above technical problem, an embodiment of the present invention provides a display panel including a substrate, a plurality of sub-pixels, and a plurality of micro-lenses, wherein the plurality of sub-pixels are located on one side of the substrate, the plurality of sub-pixels include a first sub-pixel and a second sub-pixel, the perimeter-to-area ratio of the first sub-pixel is greater than the perimeter-to-area ratio of the second sub-pixel; the perimeter-to-area ratio is the ratio of the perimeter of the sub-pixel projected vertically in the direction of the substrate to its area; the plurality of micro-lenses are located on a side of the plurality of sub-pixels away from the substrate, the plurality of micro-lenses include a first micro-lens and a second micro-lens; the vertical projection of the first sub-pixel on the substrate is located within the vertical projection of the first micro-lens on the substrate, and an edge of the vertical projection of the first sub-pixel on the substrate is separated from an edge of the vertical projection of the first micro-lens on the substrate by a first distance along a first direction; the vertical projection of the second sub-pixel on the substrate is located within the vertical projection of the second micro-lens on the substrate, and an edge of the vertical projection of the second sub-pixel on the substrate is separated from an edge of the vertical projection of the second micro-lens on the substrate by a second distance along the first direction; the number density of the first micro-lenses is less than the number density of the second sub-pixels, and / or the first distance is greater than the second distance.

[0027] By adopting the above technical solution, a micro lens panel (MLP) is set on the light-emitting side of at least part of the sub-pixels, and the micro lenses on the light-emitting side of the sub-pixels are set differently according to the structural characteristics of the sub-pixels, so that the attenuation rate of the luminance of sub-pixels of different luminous colors at the same viewing angle as the viewing angle changes is the same or approximately the same, thereby reducing the color trajectory offset problem of the display panel caused by the different brightness attenuation of sub-pixels of different luminous colors, thereby solving the display color shift problem, improving the display effect of the display panel, and reducing the power consumption of the display panel.

[0028] The above is the core concept of the present invention. The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Figure 2 is a structural diagram of a display panel provided by an embodiment of the present invention, Figure 3 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Figure 4 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Figure 5 yes Figure 3 A schematic cross-sectional view along the AA' direction. Figure 3-Figure 5As shown, a display panel 200 provided by an embodiment of the present invention includes a substrate 20, a plurality of sub-pixels 21, and a plurality of micro-lenses 22. The plurality of sub-pixels 21 are located on one side of the substrate 20. The plurality of sub-pixels 21 include a first sub-pixel 211 and a second sub-pixel 212. The perimeter-to-area ratio (C1 / S1) of the first sub-pixel 211 is greater than the perimeter-to-area ratio (C2 / S2) of the second sub-pixel 212. The perimeter-to-area ratio (C / S) is the ratio of the perimeter C of the sub-pixel projected perpendicularly to the substrate to its area S. The plurality of micro-lenses 22 are located on a side of the plurality of sub-pixels 21 away from the substrate 20. The plurality of micro-lenses 22 include a first micro-lens 221 and a second micro-lens 222. The vertical projection of the first sub-pixel 211 on the substrate 20 is located within the vertical projection of the first micro-lens 221 on the substrate. The edge of the vertical projection of the first sub-pixel 211 on the substrate 20 is separated from the edge of the vertical projection of the first micro-lens 221 on the substrate 20 by a first distance D1 along a first direction X. The vertical projection of the second sub-pixel 212 on the substrate 20 is located within the vertical projection of the second microlens 222 on the substrate 20. The edge of the vertical projection of the second sub-pixel 212 on the substrate is separated from the edge of the vertical projection of the second microlens 222 on the substrate 20 by a second distance D2 along the first direction X. The number density σ1 of the first microlenses 221 is less than the number density σ2 of the second microlenses 222, and / or the first distance D1 is greater than the second distance D2.

[0030] Specifically, in an embodiment of the present application, the display panel may be an organic light-emitting display panel, and the sub-pixels include organic light-emitting materials. However, the type of display panel is not limited to an organic light-emitting display panel, and may also be other types of display panels. In other embodiments, the display panel may be a micro light-emitting diode (LED) panel. When the display panel is a micro LED panel, the sub-pixels are micro light-emitting diodes, wherein the micro light-emitting diodes may be Mini LED or Micro LED. The substrate 20 of the display panel may be a rigid material such as glass or silicon wafer, or a flexible material such as ultra-thin glass, metal foil or polymer plastic material. The flexible or rigid substrate 20 may block oxygen and moisture, preventing moisture or impurities from diffusing into the display panel through the substrate 20.

[0031] Combine Figure 2-Figure 4As shown, the plurality of sub-pixels 21 include a first sub-pixel 211 and a second sub-pixel 212 of different luminescent colors. For example, the first sub-pixel 211 and the second sub-pixel 212 are green luminescent sub-pixel G and red luminescent sub-pixel R, respectively. Due to differences in properties such as luminescent materials of sub-pixels of different colors, the luminescent surface size of the green luminescent sub-pixel G is generally smaller than the luminescent surface size of the red luminescent sub-pixel R. Therefore, the perimeter-to-area ratio (C1 / S1) of the first sub-pixel 211 is set to be greater than the perimeter-to-area ratio (C2 / S2) of the second sub-pixel 212. The perimeter-to-area ratio (C1 / S1) of the first sub-pixel 211 refers to the ratio of the perimeter C1 of the first sub-pixel 211 projected onto the substrate along the Z direction in the figure to the area S1 of its projection onto the substrate, and the perimeter-to-area ratio (C2 / S2) of the second sub-pixel 212 refers to the ratio of the perimeter C2 of the second sub-pixel 212 projected onto the substrate along the Z direction in the figure to the area S2 of its projection onto the substrate.

[0032] Microlenses 22 are provided on the light-emitting sides of the plurality of sub-pixels 21. For example, a first microlens 221 is provided on the light-emitting side of the first sub-pixel 211, and a second microlens 222 is provided on the light-emitting side of the second sub-pixel 212. The first microlens 221 is used to converge the wide-viewing angle light emitted by the first sub-pixel 211, which is beneficial to improving the brightness of the light emitted by the first sub-pixel 211 at a normal viewing angle; the second microlens 222 is used to converge the wide-viewing angle light emitted by the second sub-pixel 212, which is beneficial to improving the brightness of the light emitted by the second sub-pixel 212 at a normal viewing angle.

[0033] Table 1 shows the relationship between the sub-pixel area S and the perimeter area ratio (C / S)

[0034] <![CDATA[S(μm 2 )]]> C / S 144 0.333333 196 0.285714 256 0.25 324 0.222222 400 0.2 484 0.181818 576 0.166667

[0035] As shown in Table 1, as the area S of the sub-pixel 21 projected on the substrate along the Z direction in the figure increases, the perimeter area ratio (C / S) of the sub-pixel 21 gradually decreases. Usually, the luminous areas of sub-pixels 21 of different luminous colors are different, resulting in different perimeter area ratios (C / S) of sub-pixels 21 of different luminous colors in the display panel.

[0036] The inventors have discovered that after sub-pixels 21 of different luminous colors are converged by microlens 22, the efficiency improvement ratio R(x) and the viewing angle brightness reduction value LD(x) of the light emitted from sub-pixel 21 are positively correlated with the perimeter-to-area ratio (C / S) of sub-pixel 21. A larger perimeter-to-area ratio (C / S) of sub-pixel 21 results in a larger efficiency improvement ratio R(x) of the light emitted from sub-pixel 21, indicating greater light extraction efficiency from the microlens. Furthermore, a larger viewing angle brightness reduction value LD(x) indicates that the brightness of the sub-pixel at oblique viewing angles is closer to that at normal viewing angles, and the brightness attenuation of the sub-pixel is reduced.

[0037] Among them, the efficiency improvement ratio R(x) refers to the ratio of the brightness value of the sub-pixel with a microlens to the brightness value when no microlens is set. The larger the value, the greater the light extraction efficiency of the microlens for the sub-pixel; the viewing angle brightness reduction value LD(x) refers to the ratio of the brightness of the light-emitting side of the sub-pixel at an oblique viewing angle to the brightness at a normal viewing angle.

[0038] Because the perimeter-to-area ratios (C / S) of sub-pixels 21 of different luminous colors in the display panel are different, their emitted light, after being converged by the microlenses 22, can vary significantly in the efficiency improvement ratio R(x) and the viewing angle brightness reduction value LD(x) of the sub-pixels 21 of different luminous colors at the same viewing angle. This can easily cause the display panel's color trajectory to shift and display color cast. This application differentiates the number of microlenses 22 on the light-emitting side of sub-pixels 21 of different luminous colors and / or the aperture size of the projection of each microlens 22, so that the luminance decay rate of sub-pixels 21 of different luminous colors at the same viewing angle is the same or approximately the same as that of the sub-pixels 21.

[0039] A feasible implementation method is to combine Figure 2 As shown, the number density σ1 of the first microlenses 221 on the light-emitting side of the first sub-pixel 211 is set to be smaller than the number density σ2 of the second microlenses 222 on the light-emitting side of the second sub-pixel 212 .

[0040] Since the smaller the light-emitting surface of a sub-pixel, the larger its corresponding perimeter-to-area ratio (C / S), the light-emitting surface of the first sub-pixel 211 is smaller than the light-emitting surface of the second sub-pixel 212. Within the light-emitting area of ​​the display panel, the number density σ1 of the first microlenses 221 on the light-emitting side of the first sub-pixel 211 is set to be smaller than the number density σ2 of the second microlenses 222 on the light-emitting side of the second sub-pixel 212. This balances the efficiency improvement ratio R(x) of the first sub-pixels 211 and the second sub-pixels 212 within the entire light-emitting area. This ensures that the luminance of the first sub-pixels 211 and the second sub-pixels 212 of different luminous colors attenuate at the same or approximately the same rate as the viewing angle changes at the same viewing angle. That is, the viewing angle luminance reduction values ​​LD(x) of the sub-pixels of different luminous colors are similar, thereby avoiding the display panel's track color shift problem.

[0041] A feasible implementation method, combined with Figure 3 and Figure 4As shown, along the Z direction in the figure, the projection of the first sub-pixel 211 is arranged to overlap the projection of the first microlens 221, and the projection of the second sub-pixel 212 is arranged to overlap the projection of the second microlens 222. Moreover, a first distance D1 along the X direction in the figure between the edge of the projection of the first sub-pixel 211 and the edge of the projection of the first microlens 221 is arranged to be greater than a second distance D2 along the X direction in the figure between the edge of the projection of the second sub-pixel 212 and the edge of the projection of the second microlens 222. In the X direction in the figure, the first distance D1 is the minimum distance between the edge of the projection of the first sub-pixel 211 and the edge of the projection of the first microlens 221, and the second distance D2 is the minimum distance between the edge of the projection of the second sub-pixel 212 and the edge of the projection of the second microlens 222 along the X direction in the figure.

[0042] According to the display effect of the display panel, combined with Figure 3 As shown, the number density σ1 of the first microlenses 221 on the light-emitting side of the first sub-pixel 211 can be set to be smaller than the number density σ2 of the second microlenses 222 on the light-emitting side of the second sub-pixel 212. Figure 4 As shown, the number density σ1 of the first microlenses 221 on the light-emitting side of the first sub-pixel 211 can also be set to be the same as the number density σ2 of the second microlenses 222 on the light-emitting side of the second sub-pixel 212. The number density σ1 of the first microlenses 221 refers to the ratio of the number of first sub-pixels with the first microlenses arranged on the light-emitting side to the total number of all first sub-pixels within the light-emitting area of ​​the display panel, and the number density σ2 of the second microlenses 222 refers to the ratio of the number of second sub-pixels with the second microlenses arranged on the light-emitting side to the total number of all second sub-pixels within the light-emitting area of ​​the display panel.

[0043] by Figure 3 For example, combined with Figure 3 and Figure 5As shown, since the width P1 of the first sub-pixel 211 along the X direction in the figure is smaller than the width P2 of the second sub-pixel 212, by differentially setting the relative distances between the sub-pixels of different luminous colors and their corresponding microlenses along the X direction in the figure, the first distance D1 is set to be greater than the second distance D2, so that P1+D1≈P2+D2, θ1≈θ2, that is, the large viewing angle (θ1) light L1 emitted by the first sub-pixel 211 is deflected by the first microlens 221 and emitted toward the positive viewing angle (that is, the Z direction in the figure), and the large viewing angle (θ2) light L1 emitted by the second sub-pixel 212 is emitted toward the positive viewing angle (that is, the Z direction in the figure). After being deflected by the second microlens 222, the line L2 is emitted toward the normal viewing angle (i.e., the Z direction in the figure). This helps to achieve the same or approximately equal efficiency improvement ratio R1 of the first microlens 221 for the first sub-pixel 211 and the same or approximately equal efficiency improvement ratio R1 of the second microlens 222 for the second sub-pixel 212. Along the viewing angle in the X direction in the figure, the luminous brightness of the first sub-pixel 211 and the second sub-pixel 212 decay at the same or approximately the same rate as the viewing angle changes. That is, the viewing angle brightness reduction values ​​LD(x) of different luminous colors are similar, thereby avoiding color shift of the display panel.

[0044] Specifically, Figure 6 The chromaticity trajectory of a display panel provided by an embodiment of the present invention is represented by UV values. The UV coordinates refer to a two-dimensional plane in which the coordinate is U and the vertical coordinate is V. Figure 6 The circle with a value of 3.5 represents the customer specification for a 30° viewing angle, the circle with a value of 4.5 represents the customer specification for a 45° viewing angle, and the circle with a value of 5.5 represents the customer specification for a 60° viewing angle. The solid line within the dotted line indicates that there is no microlens on the light-emitting side of the sub-pixel, while the dashed line indicates that a microlens is installed on the light-emitting side of the sub-pixel, with differentiated microlens configurations.

[0045] For the dotted line, the first point O1 at the center is a 0° viewing angle, the second point O2 is a 30° viewing angle, the third point O4 is a 45° viewing angle, and the fourth point O5 is a 60° viewing angle. The point on the dotted line with a 30° viewing angle must be within the 3.5 circle and must not exceed the customer's specifications. Similarly, the point on the dotted line with a 45° viewing angle must be within the 4.5 circle and must not exceed the customer's specifications, and so on. Figure 6 As can be seen from the solid and dashed lines in FIG, the test points O on the dotted lines are all within the customer specifications, and both have a high degree of fit, indicating that the differentiated microlens setting scheme provided by the embodiment of the present invention can effectively avoid color deviation of the display panel track.

[0046] In summary, the display panel provided by the embodiment of the present invention can make the attenuation rate of the luminous brightness of sub-pixels of different luminous colors in the display panel at the same viewing angle the same or approximately the same by differentially setting the number of micro-lenses on the light-emitting side of sub-pixels of different luminous colors and / or the opening size of the projection of each micro-lens, thereby reducing the color trajectory offset problem of the display panel caused by the different brightness attenuation of sub-pixels of different luminous colors, thereby solving the display color deviation problem, improving the display effect of the display panel, and reducing the power consumption of the display panel.

[0047] On the basis of the above embodiment, continue to refer to Figure 5 As shown, the display panel 200 includes a pixel defining layer 23, a low refractive index layer 24 and a high refractive index layer 25; the pixel defining layer 23 is located on one side of the substrate 20 and is provided with a first opening, and the sub-pixel 21 is located in the first opening; the low refractive index layer 24 is located between the sub-pixel 21 and the high refractive index layer 25 and is provided with a second opening, and the part of the high refractive index layer 25 filling the second opening is formed as a microlens 22.

[0048] Specific, combined Figure 5 As shown, taking an OLED display panel as an example, a "patterning" preparation process is used to prepare a pixel defining layer 23 and a low refractive index layer 24 on one side of a substrate 20. A plurality of first openings are provided in the pixel defining layer 23, and a plurality of sub-pixels 21 are respectively located in different first openings. A plurality of second openings are provided in the low refractive index layer 24, and the portion of the second opening filled with a high refractive index layer 25 is formed as a microlens 22. The sidewall M1 of the second opening is the interface between the low refractive index layer 24 and the high refractive index layer 25. By adjusting the inclination angle α of the interface, the reflection and refraction ratio of the light emitted by the sub-pixel 21 is adjusted, thereby achieving light regulation and improving the light extraction efficiency of the sub-pixel. Among them, the inclination angle α is the angle between the tangent line of the interface and the plane where the sub-pixel light-emitting surface is located. Taking the first microlens 221 corresponding to the first sub-pixel 211 as an example, by utilizing the principle of total internal reflection, part of the large-viewing angle (θ1) light L1 emitted by the first sub-pixel 211 is deflected by the side wall M1 of the first microlens 221 and then emitted toward the normal viewing angle (i.e., the Z direction in the figure), thereby improving the brightness of the light emitted from the first microlens 221 at the normal viewing angle.

[0049] The low refractive index layer 24 and the high refractive index layer 25 are made of light-transmitting materials, and the refractive index of the low refractive index layer 24 is lower than that of the high refractive index layer 25 .

[0050] It should be noted that the “patterning” herein specifically refers to a non-whole layer structure, that is, a structure in which a whole layer of material is first formed and then a specific shape is carved during the manufacturing process; the display panel provided in the embodiment of the present application also includes other film layers, combined with Figure 5As shown, the driving circuit layer 26 is located on one side of the substrate 20, and the polarizing layer 27 and the encapsulation layer 28 are located on the side of the high refractive index layer 25 away from the substrate 20. The driving circuit layer 26 is used to drive multiple sub-pixels 21 to emit light. The polarizing layer 27 is a circular polarizer that can prevent glare. Multiple film layers work together to realize the display function of the display panel, which will not be described one by one here.

[0051] On the basis of the above embodiment, continue to refer to Figure 2-Figure 7 As shown, the sub-pixel 21 further includes a third sub-pixel 213, and the perimeter area ratio (C2 / S2) of the second sub-pixel 212 is greater than the perimeter area ratio (C3 / S3) of the third sub-pixel 213; the microlens 22 further includes a third microlens 223, the vertical projection of the third sub-pixel 213 on the substrate 20 is located within the vertical projection of the third microlens 223 on the substrate 20, and the edge of the vertical projection of the third sub-pixel 213 on the substrate 20 is separated from the edge of the vertical projection of the third microlens 223 on the substrate 20 by a third distance D3 along the first direction X; the number density σ2 of the second microlenses 222 is less than the number density σ3 of the third microlenses 223, and / or the second distance D2 is greater than the third distance D3.

[0052] Specifically, the sub-pixel 21 of the display panel 200 includes a third sub-pixel 213 of blue light emitting color B. Generally, the light emitting area S3 of the third sub-pixel 213 of blue light emitting color B is larger than the light emitting area S2 of red light emitting color R and larger than the light emitting area S1 of green light emitting color B. Figure 2 As shown, a feasible implementation manner is to set the number density σ2 of the second microlenses 222 to be smaller than the number density σ3 of the third microlenses 223 to balance the efficiency improvement ratio R(x) of the third sub-pixel 213 and the second sub-pixel 212 in the entire light-emitting area. This ensures that the first sub-pixel 211, the second sub-pixel 212, and the third sub-pixel 213 of different luminous colors have the same or approximately the same luminous brightness attenuation rate with viewing angle at the same viewing angle. That is, the viewing angle brightness reduction values ​​LD(x) of the sub-pixels of different luminous colors are similar, thereby reducing the color shift problem of the display panel.

[0053] Continue to combine Figure 3 and Figure 4 As shown in FIG. 1 , a feasible implementation manner is to set the projection of the third sub-pixel 213 to overlap the projection of the third microlens 223 along the Z direction in the figure, and set a second distance D2 along the X direction in the figure between the edge of the projection of the second sub-pixel 212 and the edge of the projection of the second microlens 222 to be greater than a third distance D3 along the X direction in the figure between the edge of the projection of the third sub-pixel 213 and the edge of the projection of the third microlens 223. In the X direction in the figure, the third distance D3 is the minimum distance between the edge of the projection of the third sub-pixel 213 and the edge of the projection of the third microlens 223 along the X direction in the figure.

[0054] Combine Figure 3 and Figure 5 As shown, since the width P3 of the third sub-pixel 213 along the X direction in the figure is greater than the width P2 of the second sub-pixel 212, by differentially setting the relative distances between sub-pixels of different luminous colors and their corresponding microlenses along the X direction in the figure, the second distance D2 is set to be greater than the third distance D3, so that P3+D3≈P1+D1≈P2+D2, θ3≈θ1≈θ2, that is, the large-viewing angle (θ3) light L3 emitted by the third sub-pixel 213 is deflected by the third microlens 223 and emitted toward the positive viewing angle (that is, the Z direction in the figure).

[0055] The above-described structural arrangement facilitates achieving the same or approximately equal efficiency improvement ratio R3 of the third microlens 223 for the third sub-pixel 213, the same efficiency improvement ratio R1 of the first microlens 221 for the first sub-pixel 211, and the same efficiency improvement ratio R2 of the second microlens 222 for the second sub-pixel 212. Along the viewing angle in the X direction in the figure, the luminous brightness of the first sub-pixel 211, the second sub-pixel 212, and the third sub-pixel 213 decay at the same or approximately the same rate as the viewing angle changes. That is, the viewing angle brightness reduction values ​​LD(x) of different luminous colors are similar, thereby further solving the color shift problem of the display panel.

[0056] Figure 7 yes Figure 4 A schematic cross-sectional view along the EE' direction. Based on the above embodiment, continue to refer to Figure 3 、 Figure 4 and Figure 7 As shown, the edge of the first sub-pixel 211 projected perpendicularly to the substrate and the edge of the first microlens 221 projected perpendicularly to the substrate are separated by a fourth distance D4 along the second direction Y; the edge of the second sub-pixel 212 projected perpendicularly to the substrate and the edge of the second microlens 222 projected perpendicularly to the substrate are separated by a fifth distance D5 along the second direction Y; the edge of the third sub-pixel 213 projected perpendicularly to the substrate and the edge of the third microlens 223 projected perpendicularly to the substrate are separated by a sixth distance D6 along the second direction Y; the second direction Y intersects the first direction X; the fourth distance D4 is greater than the fifth distance D5, and the fifth distance D5 is greater than the sixth distance D6.

[0057] Specific, combined Figure 7 As shown, along the Z direction in the figure, the shape of the projection of the sub-pixel 21 includes a circle or a rectangle. Figure 2-Figure 4 In the figure, the projection shape of the sub-pixel 21 is a rectangle. Figure 4 and Figure 7As shown, the width P1 of the first sub-pixel 211 along the Y direction in the figure is smaller than the width P2 of the second sub-pixel 212, and the width P2 of the second sub-pixel 212 is smaller than the width P3 of the third sub-pixel 213. By differentially setting the relative distances between sub-pixels of different luminous colors and their corresponding microlenses along the Y direction in the figure, the first distance D4 is set to be greater than the second distance D5, and the fifth distance D5 is set to be greater than the sixth distance D6, so that P3+D4≈P1+D5≈P2+D6, θ6≈θ4≈θ5, that is, the large viewing angle (θ4) light L4 emitted by the first sub-pixel 211 is deflected by the first microlens 221 and emitted toward the positive viewing angle (i.e., the Z direction in the figure), the large viewing angle (θ5) light L5 emitted by the second sub-pixel 212 is deflected by the second microlens 222 and emitted toward the positive viewing angle (i.e., the Z direction in the figure), and the large viewing angle (θ6) light L6 emitted by the third sub-pixel 213 is deflected by the third microlens 223 and emitted toward the positive viewing angle (i.e., the Z direction in the figure).

[0058] The above-described structural arrangement facilitates achieving the same or approximately equal efficiency improvement ratio R1 of the first microlens 221 for the first sub-pixel 211 and the second microlens 222 for the second sub-pixel 212. Along the Y-direction viewing angle in the figure, the luminous brightness of the first sub-pixel 211, the second sub-pixel 212, and the third sub-pixel 213 decays at the same or approximately the same rate as the viewing angle changes. That is, the viewing angle brightness reduction values ​​LD(x) of different luminous colors are similar, thereby avoiding color shift of the display panel.

[0059] Based on the above embodiments, Figure 2 and Figure 3 As shown, the efficiency improvement ratio of the first sub-pixel 211 is recorded as R1, the number density of the first microlens 221 is recorded as σ1, the efficiency improvement ratio of the second sub-pixel 212 is recorded as R2, the number density of the second microlens 222 is recorded as σ2, the efficiency improvement ratio of the third sub-pixel 213 is recorded as R3, and the number density of the third microlens 223 is recorded as σ3, satisfying: Wherein, a1, a2 and a3 are all first parameters, and the efficiency improvement ratio is the ratio of the brightness value of the sub-pixel with the microlens set to the brightness value when the microlens is not set.

[0060] Specifically, the inventors further discovered that the viewing angle brightness reduction value LD(x) of the sub-pixels 21 of different luminous colors is positively correlated with the perimeter area ratio (C / S) of the sub-pixels 21 and the number density σ1 of the corresponding microlenses 22 .

[0061] In the display area of ​​the display panel, the viewing angle brightness reduction value of the first sub-pixel 211 marked with green light emission color is The viewing angle brightness reduction value of the second sub-pixel 212 of the red light emitting color is marked The brightness reduction value of the third sub-pixel 213 with blue light emission color is marked Among them, a1, a2, and a3 are all constants and optional, 1.2≤a1≤1.4, 1.2≤a2≤1.4, 1.2≤a3≤1.4.

[0062] By properly adjusting the efficiency improvement ratio R1 of the first sub-pixel 211, the number density σ1 of the first microlenses 221, the efficiency improvement ratio R2 of the second sub-pixel 212, the number density σ2 of the second microlenses 222, the efficiency improvement ratio R3 of the third sub-pixel 213, and the number density σ3 of the third microlenses 223, LD(R)=LD(G)=LD(B) can be achieved. That is, at the same viewing angle, the luminance of the first sub-pixel 211, the second sub-pixel 212, and the third sub-pixel 213 of different luminous colors decays at the same or approximately the same rate as the viewing angle changes, thereby avoiding color shift in the display panel.

[0063] A feasible embodiment mode, continue to refer to Figure 2 As shown, the first distance L1, the second distance D2, and the third distance D3 are set equal. The perimeter of the first sub-pixel 211 projected perpendicularly on the substrate is denoted as C1, the area of ​​the first sub-pixel 211 projected perpendicularly on the substrate is denoted as S1, the perimeter of the second sub-pixel 212 projected perpendicularly on the substrate is denoted as C2, the area of ​​the second sub-pixel 212 projected perpendicularly on the substrate is denoted as S2, the perimeter of the third sub-pixel 213 projected perpendicularly on the substrate is denoted as C3, and the area of ​​the third sub-pixel 213 projected perpendicularly on the substrate is denoted as S3, satisfying the following: R1 = C1 / S1, R2 = C2 / S2, and R3 = C3 / S3.

[0064] Specific, combined Figure 2 As shown, the inventors have found that setting the first distance D1, the second distance D2, and the third distance D3 equal makes the relative distances between the microlens and its corresponding sub-pixel along the X direction in the figure the same. Preferably, D1 = D2 = D3 = 1 μm. Within the display area of ​​the display panel, the efficiency improvement ratio R1 = C1 / S1 of the first sub-pixel 211 of the green light-emitting color, where R1 and the perimeter area ratio (C1 / S1) of the first sub-pixel 211 are in a 1:1 relationship. The efficiency improvement ratio R2 = C2 / S2 of the second sub-pixel 212 of the red light-emitting color, where R2 and the perimeter area ratio (C2 / S2) of the second sub-pixel 212 are in a 1:1 relationship. The efficiency improvement ratio R3 = C3 / S3 of the first sub-pixel 211 of the blue light-emitting color, where R3 and the perimeter area ratio (C3 / S3) of the third sub-pixel 213 are in a 1:1 relationship.

[0065] Since the perimeter-to-area ratio (C / S) of sub-pixels of different luminous colors is the ratio of the perimeter C and the area S of the vertical projection of the sub-pixel on the substrate, it can be determined by setting the parameter structure of the sub-pixel. On this basis, the arrangement density of the microlenses of sub-pixels of different luminous colors can be changed by adjusting the number density σ1 of the first microlens 221 corresponding to the first sub-pixel 211, the number density σ2 of the second microlens 222 corresponding to the second sub-pixel 212, and the number density σ3 of the third microlens 223 corresponding to the third sub-pixel 213, that is, LD(R)=LD(G)=LD(B) can be achieved. For example, as Figure 2 As shown in Figure 2, since (C1 / S1)>(C2 / S2)>(C2 / S2), we can set σ1<σ2<σ3 to achieve That is, at the same viewing angle, the luminance of the first sub-pixel 211 , the second sub-pixel 212 and the third sub-pixel 213 of different luminous colors decays at the same or approximately the same rate as the viewing angle changes, thereby avoiding color deviation of the display panel.

[0066] Figure 8 This is a graph showing the relationship between the efficiency improvement ratio of a sub-pixel and the distance between the micro-lenses provided by an embodiment of the present invention. Figure 3 、 Figure 4 and Figure 8 As shown, the first distance is recorded as D1, the second distance is recorded as D2, and the third distance is recorded as D3. It is set that at least two of the first distance D1, the second distance D2, and the third distance D3 are not equal; the perimeter of the first sub-pixel 211 projected vertically on the substrate is recorded as C1, the area of ​​the first sub-pixel 211 projected vertically on the substrate is recorded as S1, the perimeter of the second sub-pixel 212 projected vertically on the substrate is recorded as C2, the area of ​​the second sub-pixel 212 projected vertically on the substrate is recorded as S2, the perimeter of the third sub-pixel 213 projected vertically on the substrate is recorded as C3, and the area of ​​the third sub-pixel 213 projected vertically on the substrate is recorded as S3, satisfying: Among them, b1, b2 and b3 are all second parameters. Figure 8 There are two lines in , one of which is the line after the linear fitting of the other.

[0067] Specific, combined Figure 3 、 Figure 4 As shown and Figure 8 As shown, the inventors have found that when at least two of the first distance D1, the second distance D2, and the third distance D3 are set to be unequal, when the relative distance D between the microlens and its corresponding sub-pixel along the X direction in the figure is differentiated, the efficiency of the sub-pixels of different luminous colors in the display area of ​​the display panel is improved by R xIt satisfies a positive linear relationship with the perimeter area ratio (C / S) of the sub-pixel, and is negatively correlated with the relative distance between the microlens and its corresponding sub-pixel along the X direction in the figure. For example, if D1≠D2≠D3 is set, the efficiency improvement ratio R x The perimeter area ratio (C / S) of the sub-pixel satisfies y=-0.0376x+0.01607, where Figure 8 , the horizontal axis x is the relative distance D between the second opening of the microlens corresponding to the sub-pixel and the first opening in the pixel defining layer along the X direction in the figure, in μm (micrometer); the vertical axis y is the efficiency improvement ratio (Rx) of the sub-pixel with the microlens set.

[0068] After testing, the efficiency improvement ratio of the first sub-pixel 211 is R1 = C1 / S1-b1*D1, the efficiency improvement ratio of the second sub-pixel 212 of the red light-emitting color is R2 = C2 / S2-b2*D2, and the efficiency improvement ratio of the first sub-pixel 211 of the blue light-emitting color is R3 = C3 / S3-b3*D3. Since the perimeter-area ratio (C / S) of sub-pixels of different light-emitting colors is the ratio of the perimeter C and the area S of the vertical projection of the sub-pixel on the substrate, it can be determined by setting the parameter structure of the sub-pixel. On this basis, a feasible implementation method continues to combine Figure 4 As shown, when the number density σ1 of the first microlenses 221, the number density σ2 of the second microlenses 222, and the number density σ3 of the third microlenses 223 are set to the same, it is possible to adjust only the first distance D1 corresponding to the first sub-pixel 211, the second distance D2 corresponding to the second sub-pixel 212, and the third distance D3 corresponding to the third sub-pixel 213. By changing the relative distances between sub-pixels of different luminous colors and their corresponding microlenses along the X direction in the figure, the efficiency improvement ratio Rx of each microlens for sub-pixels of different luminous colors at the same viewing angle position is changed, that is, LD(R)=LD(G)=LD(B) can be achieved.

[0069] For example, Figure 4 As shown, since (C1 / S1)>(C2 / S2)>(C2 / S2), D1>D2>D3 can be set, b1, b2 and b3 are all constants, optionally 0.003≤b1≤0.005, 0.003≤b2≤0.005, 0.003≤b3≤0.005. So R1=R2=R3, thus achieving:

[0070] That is, at the same viewing angle, the luminance of the first sub-pixel 211 , the second sub-pixel 212 and the third sub-pixel 213 of different luminous colors decays at the same or approximately the same rate as the viewing angle changes, thereby avoiding color deviation of the display panel.

[0071] A feasible implementation method, combined with Figure 3As shown, when the number density σ1 of the first microlenses 221, the number density σ2 of the second microlenses 222, and the number density σ3 of the third microlenses 223 are set differently, the first distance D1 corresponding to the first sub-pixel 211 and the number density σ1 of the first microlenses 221, the second distance D2 corresponding to the second sub-pixel 212 and the number density σ2 of the second microlenses 222, and the third distance D3 corresponding to the third sub-pixel 213 and the number density σ3 of the third microlenses 223 can also be adjusted simultaneously. That is, LD(R)=LD(G)=LD(B), so that at the same viewing angle, the luminous brightness of the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 with different luminous colors have the same or approximately the same attenuation rate as the viewing angle changes, thereby avoiding color deviation of the display panel track.

[0072] The embodiment of the present invention provides a differentiated micro-lens structure suitable for various sub-pixel arrangements. Some feasible sub-pixel arrangements are listed below.

[0073] A feasible implementation method, continue to refer to Figure 2-Figure 7 As shown, along the first direction X, the second sub-pixel 212, the first sub-pixel 211, and the third sub-pixel 213 are arranged in sequence; along the second direction Y, a plurality of first sub-pixels 211 are repeatedly arranged, a plurality of second sub-pixels 212 are repeatedly arranged, and a plurality of third sub-pixels 213 are repeatedly arranged; the second direction Y intersects the first direction X. Preferably, the second direction Y is orthogonal to the first direction X.

[0074] Specifically, the graphic structure of the first opening in the pixel definition layer PDL can be adjusted to set the arrangement of each sub-pixel 21, and the microlenses corresponding to sub-pixels of different luminous colors can be differentially set to achieve that at the same viewing angle position, the luminous brightness of the first sub-pixel 211, the second sub-pixel 212 and the third sub-pixel 213 of different luminous colors have the same or approximately the same attenuation rate with the change of viewing angle, thereby avoiding color deviation of the display panel track.

[0075] Figure 9 FIG. 1 is a schematic diagram of another display panel structure provided by an embodiment of the present invention. A feasible implementation method, combined with Figure 9 As shown, the display panel 200 includes a plurality of pixel units 30 arranged in an array, and the pixel unit 30 includes a first sub-pixel 211, a second sub-pixel 212, and a third sub-pixel 213. In the same pixel unit 30, the first sub-pixel 211 and the second sub-pixel 212 are arranged along the second direction Y, and along the first direction X, the third sub-pixel 213 overlaps with the second sub-pixel 212 and the first sub-pixel 211. The second direction Y intersects the first direction X.

[0076] Specific, combined Figure 9As shown, the display panel 200 includes a plurality of pixel units 30 arranged in an array. Each pixel unit 30 includes a first sub-pixel 211, a second sub-pixel 212, and a third sub-pixel 213 of three different luminous colors. Along the Z direction in the figure, the vertical projection of the sub-pixels on the substrate is a rectangle. Since the projection area of ​​the blue sub-pixel B is larger than the projection area of ​​the green sub-pixel G, the projection area of ​​the green sub-pixel G is larger than the projection area of ​​the red sub-pixel R. Combined with the perimeter area ratio (C / S) of the red sub-pixel R as shown in Table 1, R Greater than the perimeter-to-area ratio (C / S) of the green sub-pixel G G , the perimeter area ratio of the green sub-pixel G (C / S) G Greater than the perimeter-to-area ratio (C / S) of the blue sub-pixel B B At this time, the first sub-pixel 211 is set as a red sub-pixel R, the second sub-pixel 212 is set as a green sub-pixel G and the third sub-pixel 213 is set as a blue sub-pixel B. The structure differentiation setting of the micro-lens on the light-emitting side of the sub-pixel provided in the above embodiment also satisfies Figure 9 The sub-pixel arrangement shown in the figure also has the beneficial effects of the display panel in the above embodiment. The similarities can be understood by referring to the above explanation of the display panel, and will not be repeated below.

[0077] Figure 10 FIG. 1 is a schematic diagram of another display panel structure provided by an embodiment of the present invention. A feasible implementation method, combined with Figure 10 As shown, the display panel 200 includes a plurality of pixel units 40 arranged in an array, and the pixel unit 40 includes two first sub-pixels 211, a second sub-pixel 212, and a third sub-pixel 213. In the same pixel unit 40, along the first direction X, the first sub-pixel 211 overlaps with the second sub-pixel 212 or the third sub-pixel 213; along the second direction Y, the first sub-pixel 211 overlaps with the second sub-pixel 212 or the third sub-pixel 213; and the second direction Y intersects with the first direction X.

[0078] Specific, combined Figure 10 As shown, the display panel 200 includes a plurality of pixel units 40 arranged in an array, each pixel unit 40 includes two first sub-pixels 211, a second sub-pixel 212, and a third sub-pixel 213. In the figure, along the Z direction, the vertical projection of the sub-pixel on the substrate is a rectangle. The two first sub-pixels 211, the second sub-pixel 212, and the third sub-pixel 213 are respectively located in the four quadrants where the pixel unit 40 is located. Since the projected area of ​​the blue sub-pixel B is larger than the projected area of ​​the red sub-pixel R, and the projected area of ​​the red sub-pixel R is larger than the projected area of ​​the green sub-pixel G, combined with Table 1, the perimeter area ratio (C / S) of the green sub-pixel G is G Greater than the perimeter-to-area ratio (C / S) of the red sub-pixel RR , the perimeter area ratio of the red sub-pixel R (C / S) R Greater than the perimeter-to-area ratio (C / S) of the blue sub-pixel B B At this time, the first sub-pixel 211 is set as the green sub-pixel G, the second sub-pixel 212 is set as the red sub-pixel R and the third sub-pixel 213 is set as the blue sub-pixel B. The structure differentiation setting of the micro-lens on the light-emitting side of the sub-pixel provided in the above embodiment also satisfies Figure 10 The sub-pixel arrangement shown in the figure also has the beneficial effects of the display panel in the above embodiment. The similarities can be understood by referring to the above explanation of the display panel, and will not be repeated below.

[0079] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Figure 11 A schematic diagram of the structure of a display device provided by an embodiment of the present invention is shown in FIG. Figure 11 As shown, the display device includes any one of the display panels provided in the above embodiments. Figure 11 As shown, the display device 300 includes a display panel 200. Therefore, the display device also has the beneficial effects of the display panel in the above embodiment. The similarities can be understood by referring to the above explanation of the display panel, which will not be repeated below.

[0080] The display device 300 provided by the embodiment of the present invention can be Figure 11 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0081] Note that the above are only preferred embodiments 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 that various obvious changes, readjustments, and substitutions can be made by those skilled in the art 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 the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; a plurality of sub-pixels located on one side of the substrate, including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein a perimeter-to-area ratio of the first sub-pixel is greater than a perimeter-to-area ratio of the second sub-pixel, and a perimeter-to-area ratio of the second sub-pixel is greater than a perimeter-to-area ratio of the third sub-pixel; the perimeter-to-area ratio being a ratio of a perimeter to an area of ​​the sub-pixel as projected perpendicularly in a direction toward the substrate; a plurality of microlenses, located on a side of the plurality of sub-pixels away from the substrate, comprising a first microlens, a second microlens and a third microlens; The vertical projection of the first subpixel on the substrate is located within the vertical projection of the first microlens on the substrate, and an edge of the vertical projection of the first subpixel on the substrate is a first distance away from an edge of the vertical projection of the first microlens on the substrate along a first direction; the vertical projection of the second subpixel on the substrate is located within the vertical projection of the second microlens on the substrate, and an edge of the vertical projection of the second subpixel on the substrate is a second distance away from an edge of the vertical projection of the second microlens on the substrate along the first direction; the vertical projection of the third subpixel on the substrate is located within the vertical projection of the third microlens on the substrate, and an edge of the vertical projection of the third subpixel on the substrate is a third distance away from an edge of the vertical projection of the third microlens on the substrate along the first direction; The number density of the first microlenses is smaller than the number density of the second microlenses, and / or the first distance is larger than the second distance; the number density of the second microlenses is smaller than the number density of the third microlenses, and / or the second distance is larger than the third distance.

2. The display panel according to claim 1, wherein: An edge of a vertical projection of the first subpixel on the substrate and an edge of a vertical projection of the first microlens on the substrate are separated by a fourth distance along a second direction; an edge of a vertical projection of the second subpixel on the substrate and an edge of a vertical projection of the second microlens on the substrate are separated by a fifth distance along the second direction; an edge of a vertical projection of the third subpixel on the substrate and an edge of a vertical projection of the third microlens on the substrate are separated by a sixth distance along the second direction; and the second direction intersects the first direction; The fourth distance is greater than the fifth distance, and the fifth distance is greater than the sixth distance.

3. The display panel according to claim 1, wherein: The efficiency improvement ratio of the first sub-pixel is denoted as R1, the number density of the first microlenses is denoted as σ1, the efficiency improvement ratio of the second sub-pixel is denoted as R2, the number density of the second microlenses is denoted as σ2, the efficiency improvement ratio of the third sub-pixel is denoted as R3, and the number density of the third microlenses is denoted as σ3, satisfying: Wherein, a1, a2 and a3 are all first parameters, and the efficiency improvement ratio is the ratio of the brightness value of the sub-pixel when the microlens is set to the brightness value when the microlens is not set.

4. The display panel according to claim 3, wherein: The first distance, the second distance and the third distance are equal; The perimeter of the first sub-pixel projected vertically onto the substrate is denoted as C1, the area of ​​the first sub-pixel projected vertically onto the substrate is denoted as S1, the perimeter of the second sub-pixel projected vertically onto the substrate is denoted as C2, the area of ​​the second sub-pixel projected vertically onto the substrate is denoted as S2, the perimeter of the third sub-pixel projected vertically onto the substrate is denoted as C3, and the area of ​​the third sub-pixel projected vertically onto the substrate is denoted as S3, satisfying:

5. The display panel according to claim 3, wherein: At least two of the first distance, the second distance, and the third distance are not equal; The first distance is recorded as D1, the second distance is recorded as D2, and the third distance is recorded as D3; The perimeter of the first sub-pixel projected vertically onto the substrate is denoted as C1, the area of ​​the first sub-pixel projected vertically onto the substrate is denoted as S1, the perimeter of the second sub-pixel projected vertically onto the substrate is denoted as C2, the area of ​​the second sub-pixel projected vertically onto the substrate is denoted as S2, the perimeter of the third sub-pixel projected vertically onto the substrate is denoted as C3, and the area of ​​the third sub-pixel projected vertically onto the substrate is denoted as S3, satisfying: Among them, b1, b2 and b3 are all second parameters.

6. The display panel according to claim 3, wherein: satisfy: 1.2≤a1≤1.4, 1.2≤a2≤1.4, 1.2≤a3≤1.

4.

7. The display panel according to claim 5, wherein: satisfy: 0.003≤b1≤0.005, 0.003≤b2≤0.005, 0.003≤b3≤0.

005.

8. The display panel according to claim 1, wherein: Along the first direction, the second sub-pixel, the first sub-pixel and the third sub-pixel are arranged in sequence; Along the second direction, a plurality of the first sub-pixels are repeatedly arranged, a plurality of the second sub-pixels are repeatedly arranged, and a plurality of the third sub-pixels are repeatedly arranged; The second direction intersects the first direction.

9. The display panel according to claim 1, wherein: comprising a plurality of pixel units arranged in an array, wherein the pixel unit comprises the first sub-pixel, the second sub-pixel and the third sub-pixel; In the same pixel unit, the first sub-pixel and the second sub-pixel are arranged along the second direction, and along the first direction, the third sub-pixel overlaps with the second sub-pixel and the first sub-pixel; The second direction intersects the first direction.

10. The display panel according to claim 1, wherein comprising a plurality of pixel units arranged in an array, wherein the pixel unit comprises two of the first sub-pixels, the second sub-pixel, and the third sub-pixel; In the same pixel unit, along the first direction, the first sub-pixel overlaps with the second sub-pixel or the third sub-pixel; along the second direction, the first sub-pixel overlaps with the second sub-pixel or the third sub-pixel; The second direction intersects the first direction.

11. The display panel according to claim 1, wherein comprising a pixel defining layer, a low refractive index layer and a high refractive index layer; The pixel defining layer is located on one side of the substrate and is provided with a first opening, and the sub-pixel is located in the first opening; The low refractive index layer is located between the sub-pixel and the high refractive index layer and is provided with a second opening. A portion of the high refractive index layer filling the second opening is formed as the microlens.

12. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 11.

Images