Display panel and display device

Abstract

The present application relates to a display panel and a display device. The display panel comprises: an edge of each second opening is spaced from an edge of a first opening by a first spacing distance a1 on each side in a first direction, and an edge of the second opening is spaced from an edge of the first opening by a second spacing distance a2 on each side in a second direction; a third refractive layer comprises a plurality of third openings; a second refractive layer fills the third openings; in a direction parallel to a plane in which a substrate is located, an edge of each third opening is spaced from an edge of a second opening by a third spacing distance b1 on each side in the first direction, and the third opening is spaced from the second opening by a fourth spacing distance b2 on each side in the second direction, wherein a1≥0, a2≥0, a1≠a2, b1≥0, and b2≥0. In the present application, by adjusting the distances between the openings in different directions, the emission of light in different directions can be controlled, thereby preventing the light in a specific direction from affecting a driver's viewing of the display panel, improving the light emission efficiency in a first viewing angle, ensuring the display effect of the panel.

Description

Display panel and display device

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411090524.4, filed on August 8, 2024, entitled “A display panel and display device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of display, and in particular, to a display panel and display device. BACKGROUND

[0004] The display panel can be used as a display device of a vehicle, and a user can understand the state of the vehicle or perform certain control operations through the display panel. However, the display panel will scatter light in all directions, and the light emitted in some directions will interfere with the driver's view of the display panel, causing the driver to be unable to see the display panel clearly, thereby affecting the driving of the vehicle. For example, the light emitted upward and downward from the display screen will be reflected on the front windshield, thereby interfering with the driver.

[0005] SUMMARY

[0006] To solve the above technical problems, the present disclosure provides a display panel and display device.

[0007] In a first aspect, the present disclosure provides a display panel, comprising:

[0008] a substrate;

[0009] a pixel definition layer located on one side of the substrate, the pixel definition layer comprising a plurality of first openings;

[0010] a light-emitting layer located on a side of the pixel definition layer away from the substrate, the light-emitting layer being disposed in the first openings;

[0011] a first refractive layer located on a side of the light-emitting layer away from the substrate, the first refractive layer comprising a plurality of second openings, a projection of the first openings on the substrate being located within a projection of the second openings on the substrate;

[0012] a second refractive layer located on a side of the first refractive layer away from the substrate and filling the second openings; the refractive index of the second refractive layer being greater than the refractive index of the first refractive layer;

[0013] In a direction parallel to a plane where the substrate is located, edges of the second opening and edges of the first opening have a first interval distance a1 in a first direction, and edges of the second opening and edges of the first opening have a second interval distance a2 in a second direction, the first direction intersecting the second direction;

[0014] a third refractive layer located between the first refractive layer and the light-emitting layer; the third refractive layer comprises a plurality of third openings, a projection of the first opening on the substrate is located within a projection of the third opening on the substrate, and a projection of the third opening on the substrate is located within a projection of the second opening on the substrate;

[0015] The projection of the third opening on the substrate overlaps the projection of the second opening on the substrate; the second refractive layer fills the third opening; and a refractive index of the second refractive layer is greater than a refractive index of the third refractive layer.

[0016] In a direction parallel to a plane where the substrate is located, edges of the third opening and edges of the second opening have a third interval distance b1 in a first direction, and the third opening and the second opening have a fourth interval distance b2 in a second direction.

[0017] Wherein, a1≥0, a2≥0, a1≠a2, b1≥0, and b2≥0.

[0018] In a second aspect, the present disclosure also provides a display device comprising any of the display panels provided in the first aspect.

[0019] Compared with the prior art, the technical solutions provided by the present disclosure have the following advantages:

[0020] The refractive indices of the first refractive layer and the third refractive layer of the display panel provided by the present disclosure are lower than the refractive index of the second refractive layer. After the light emitted by the light-emitting layer exits via the first opening of the pixel definition layer, the light irradiates the third refractive layer having the third opening. Part of the light is refracted or totally reflected at the boundary between the first refractive layer and the second refractive layer, changing the light transmission path, improving the first viewing angle (front view angle) light-emitting efficiency to some extent, and improving the second viewing angle (side view angle) light-emitting. Part of the light is also refracted or totally reflected at the boundary between the third refractive layer and the second refractive layer, which can also change the light transmission path, improve the first viewing angle light-emitting, and reduce the second viewing angle light-emitting. Since there are multiple openings in the present solution, the transmission paths of the light emitted at different positions can be fully adjusted, and the emission of light at different angles is better improved. By adjusting the distances between the openings in different directions, the emission of light in different directions can be controlled, avoiding the influence of light in a specific direction on the driver's viewing of the display panel, and improving the first viewing angle light-emitting efficiency to ensure the display effect of the panel.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application can be better understood with reference to the following non-limiting examples in conjunction with the accompanying drawings, in which like reference numerals designate identical or corresponding features throughout the several views. Other features, objects, and advantages of the application will be apparent from the description of the non-limiting examples that follows, when read in conjunction with the accompanying drawings, in which like reference numerals designate identical or corresponding features throughout the several views.

[0022] FIG. 1 is a top view of a display panel according to an embodiment of the present disclosure;

[0023] FIG. 2 is an enlarged view of a portion of FIG. 1 according to an embodiment of the present disclosure;

[0024] FIG. 3 is a schematic view of a film layer structure of FIG. 1 taken along A1A2 according to an embodiment of the present disclosure;

[0025] FIG. 4 is a schematic view of a film layer structure of FIG. 1 taken along B1B2 according to an embodiment of the present disclosure;

[0026] FIG. 5 is an enlarged view of a portion of FIG. 1 according to another embodiment of the present disclosure;

[0027] FIG. 6 is an enlarged view of a portion of FIG. 1 according to another embodiment of the present disclosure;

[0028] FIG. 7 is an enlarged view of a portion of FIG. 1 according to another embodiment of the present disclosure;

[0029] FIG. 8 is an enlarged view of a portion of FIG. 1 according to another embodiment of the present disclosure;

[0030] FIG. 9 is a schematic view of a film layer structure of FIG. 1 taken along A1A2 according to another embodiment of the present disclosure;

[0031] FIG. 10 is a schematic view of a film layer structure of FIG. 1 taken along B1B2 according to another embodiment of the present disclosure;

[0032] FIG. 11 is a schematic view of a film layer structure of FIG. 1 taken along A1A2 according to another embodiment of the present disclosure;

[0033] FIG. 12 is a schematic view of a film layer structure of FIG. 1 taken along B1B2 according to another embodiment of the present disclosure;

[0034] FIG. 13 is a top view of a display panel according to another embodiment of the present disclosure;

[0035] FIG. 14 is a top view of a display panel according to another embodiment of the present disclosure;

[0036] FIG. 15 is a top view of a display panel according to another embodiment of the present disclosure;

[0037] FIG. 16 is an enlarged view of a partial structure of FIG. 13, according to an embodiment of the present disclosure;

[0038] FIG. 17 is a top view of another display panel, according to an embodiment of the present disclosure;

[0039] FIG. 18 is a top view of another display panel, according to an embodiment of the present disclosure;

[0040] FIG. 19 is an enlarged view of a partial structure of FIG. 18, according to an embodiment of the present disclosure;

[0041] FIG. 20 is a top view of another display panel, according to an embodiment of the present disclosure;

[0042] FIG. 21 is an enlarged view of a partial structure of FIG. 20, according to an embodiment of the present disclosure;

[0043] FIG. 22 is a structural schematic diagram of a display device, according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] Features and exemplary embodiments of various aspects of the present application will be described below in detail. Numerous specific details are disclosed to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely intended to provide a better understanding of the present application through showing examples of the present application. The present application is not limited to any particular configuration and algorithm set forth below, but covers any modifications, replacements, and improvements of elements, components, and algorithms without departing from the spirit of the present application. In the accompanying drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessary obscuring of the present application.

[0045] The panel of the display device in the vehicle disperses light in all directions, and light emitted in some directions may interfere with the driver's view of the display panel, causing the driver to be unable to see the display panel clearly, affecting the driving of the vehicle. For example, light emitted upward and downward from the display screen is reflected on the front windshield, thereby interfering with the driver. Therefore, a privacy film is usually used to adjust the light emission effect of the display panel, to weaken the light emission in some directions, to avoid light interference with the driver's view of the display panel. However, the privacy film, while weakening the side view angle light emission, also causes the front view angle light emission efficiency to decrease, thus affecting the actual display effect.

[0046] To solve the above problems, the display panel provided by the embodiment of the present disclosure, Fig. 1 is a top view structural schematic diagram of a display panel provided by the embodiment of the present disclosure, Fig. 2 is an enlarged view of a partial structure of Fig. 1 provided by the embodiment of the present disclosure, Fig. 3 is a film layer structure schematic diagram of Fig. 1 taken along A1A2 provided by the embodiment of the present disclosure, Fig. 4 is a film layer structure schematic diagram of Fig. 1 taken along B1B2 provided by the embodiment of the present disclosure, wherein the display panel provided by Fig. 1 includes a plurality of arrayed light emitting units 30, for example, the light emitting unit 30 can be a red light emitting unit R, a green light emitting unit G or a blue light emitting unit B (as shown in Fig. 13, described below), the embodiment of the present disclosure does not limit this, only one light emitting unit 30 is shown in Fig. 1 for explanation and description.

[0047] Referring to Figs. 1-4, the display panel 1 includes a substrate 110, a pixel definition layer 120, a light emitting layer 130, a first refractive layer 140, a second refractive layer 150 and a third refractive layer 160.

[0048] The pixel definition layer 120 is located on one side of the substrate 110, and the pixel definition layer 120 includes a plurality of first openings 21.

[0049] The light emitting layer 130 is located on a side of the pixel definition layer 120 away from the substrate 110, and the light emitting layer 130 is disposed in the first openings 21.

[0050] The first refractive layer 140 is located on a side of the light emitting layer 130 away from the substrate 110, and the first refractive layer 140 includes a plurality of second openings 22, and a projection of the first opening 21 on the substrate 110 is located within a projection of the second opening 22 on the substrate 110.

[0051] The second refractive layer 150 is located on a side of the first refractive layer 140 away from the substrate 110 and fills the second openings 22; the refractive index of the second refractive layer 150 is greater than the refractive index of the first refractive layer 140.

[0052] In a direction parallel to the plane on which the substrate 110 is located, the edges of the second openings 22 and the edges of the first openings 21 have a first interval distance a1 in a first direction D1, the edges of the second openings 22 and the edges of the first openings 21 have a second interval distance a2 in a second direction D2, and the first direction D1 intersects the second direction D2.

[0053] The third refractive layer 160 is located between the first refractive layer 140 and the light emitting layer 130; the third refractive layer 160 includes a plurality of third openings 23, a projection of the first opening 21 on the substrate 110 is located within a projection of the third opening 23 on the substrate 110, and the projection of the third opening 23 on the substrate 110 is located within the projection of the second opening 22 on the substrate 110.

[0054] The projection of the third opening 23 on the substrate 110 overlaps with the projection of the second opening 22 on the substrate 110; the second refractive layer 150 fills the third opening 23; the refractive index of the second refractive layer 150 is greater than the refractive index of the third refractive layer 160.

[0055] In the direction parallel to the plane where the substrate 110 is located, the edge of the third opening 23 and the edge of the second opening 22 have a third interval distance b1 in the first direction D1, and the third opening 23 and the second opening 22 have a fourth interval distance b2 in the second direction D2.

[0056] Wherein, a1≥0, a2≥0, a1≠a2, b1≥0, b2≥0.

[0057] Exemplarily, referring to FIG. 3 and FIG. 4, the display panel includes a substrate 110, which can be glass or a flexible substrate such as PI (Polyimide). A pixel definition layer 120 is arranged on one side of the substrate 110, and the pixel definition layer 120 includes a plurality of first openings 21, of which only one is exemplarily shown in the figure, which does not mean that the display panel includes only one first opening 21. The display panel further includes a light-emitting layer 130, which is located on the side of the pixel definition layer 120 away from the substrate 110, and the light-emitting layer 130 is arranged in the first opening 21. The light-emitting layer 130 includes a light-emitting material layer and common layers on both sides of the light-emitting material layer. In addition, an anode and a cathode are arranged on both sides of the light-emitting layer 130, and an array layer (including pixel circuits) is arranged between the substrate 110 and the pixel definition layer 120, which are all used to control the light-emitting layer 130 to emit light, which will not be explained in detail here.

[0058] The display panel further includes a first refractive layer 140 and a second refractive layer 150, wherein the refractive index of the second refractive layer 150 is greater than the refractive index of the first refractive layer 140. The first refractive layer 140 is located on the side of the light-emitting layer 130 away from the substrate 110, and the first refractive layer 140 includes a plurality of second openings 22. The projection of the first opening 21 on the substrate 110 is located within the projection of the second opening 22 on the substrate 110. The second refractive layer 150 is located on the side of the first refractive layer 140 away from the substrate 110 and fills the second opening 22. The first refractive layer 140 and the second refractive layer 150 form a microlens pattern (MLP), and the light emitted by the light-emitting layer 130 in the first opening 21 can be emitted outward. The emitted light is refracted or totally reflected at the boundary between the first refractive layer 140 and the second refractive layer 150, thereby changing the light transmission path, reducing the second viewing angle light emission, and improving the light emission efficiency of the first viewing angle. Here, the first viewing angle refers to the normal viewing angle, and the second viewing angle refers to the side viewing angle. The angle formed by the first viewing angle direction and the direction perpendicular to the plane where the substrate is located is smaller than the angle formed by the second viewing angle direction and the direction perpendicular to the plane where the substrate is located.

[0059] Since the projection of the first opening 21 on the substrate 110 is located within the projection of the second opening 11 on the substrate 110, in the direction parallel to the plane where the substrate 110 is located, the edge of the second opening 22 has a first interval distance a1 with the edge of the first opening 21 in the first direction D1, and the edge of the second opening 22 has a second interval distance a2 with the edge of the first opening 21 in the second direction D2, the first direction D1 intersects the second direction D2. Among them, a1≥0, a2≥0, a1≠a2. When the edge of the second opening 22 has a first interval distance a1 with the edge of the first opening 21 in the first direction D1, the angle and the light efficiency of the light emitted in the first direction D1 are different, and similarly, when the edge of the second opening 22 has a second interval distance a2 with the edge of the first opening 21 in the second direction D2, the angle and the light efficiency of the light emitted in the second direction D1 are also different. Therefore, the first interval distance a1 and the second interval distance a2 can be designed differently to meet the needs in actual applications. In some application scenarios, the display panel is used as a vehicle display screen, the first direction D1 represents the left and right sides of the screen (the directions where the driver and the copilot are located), and the second direction D2 represents the upper and lower sides of the screen. The upper and lower sides of the screen will be affected by the front windshield, causing reflection, which will affect the display effect. However, the driver and the copilot need to watch the screen frequently, so the light efficiency in different directions needs to be designed differently, that is, a1≠a2, to meet the needs of various situations. Considering the actual light emission effect, the projection of the first opening 21 on the substrate 110 is located within the projection of the second opening 11 on the substrate 110, so a1≥0, a2≥0.

[0060] In addition, in order to better improve the light emission efficiency of the first viewing angle and adjust the light emission brightness of the second viewing angle, the third refractive layer 160 is further provided in the embodiment of the present disclosure, the refractive index of the second refractive layer 150 is greater than that of the third refractive layer 160, the third refractive layer 160 is located between the first refractive layer 140 and the light-emitting layer 130, and the third refractive layer 160 comprises a plurality of third openings 23, only one of which is shown in the figure. The projection of the first opening 21 on the substrate 110 is located within the projection of the third opening 23 on the substrate 110, and the projection of the third opening 23 on the substrate 110 is located within the projection of the second opening 22 on the substrate 110. The projection of the third opening 23 on the substrate 110 overlaps the projection of the second opening 22 on the substrate 110; and the second refractive layer 150 fills the third opening 23.

[0061] The third refractive layer 160 and the second refractive layer 150 also form the MLP, and the light emitted by the light-emitting layer 130 in the first opening 21 is emitted outward, and part of the light is refracted or totally reflected at the boundary between the third refractive layer 160 and the second refractive layer 150, thereby changing the light transmission path, improving the light-emitting efficiency of the first viewing angle, and reducing the light brightness of the second viewing angle. Similarly, the first viewing angle refers to the normal viewing angle, and the second viewing angle refers to the side viewing angle. The first refractive layer 140 and the second refractive layer 150 can only adjust part of the light emitted at an angle, and by arranging the first refractive layer 140, the second refractive layer 150, and the third refractive layer 160, a stacked MLP is formed to adjust the light transmission path of the light emitted by the light-emitting layer 130 at different positions. It should be noted that the number of low-refractive layers arranged in the embodiments of the present disclosure is not limited, and multiple stacked MLPs can be formed to meet actual needs, but the actual process and product needs need to be considered, but the working principle and structural relationship can be referred to the embodiments.

[0062] Since the projection of the third opening 23 on the substrate 110 is located within the projection of the second opening 22 on the substrate 110, in the direction parallel to the plane in which the substrate 110 is located, the edge of the third opening 23 and the edge of the second opening 22 have a third separation distance b1 in the first direction D1, and the third opening 23 and the second opening 22 have a fourth separation distance b2 in the second direction D2, and the first direction D1 and the second direction D2 intersect. Considering the actual light-emitting effect, the projection of the third opening 23 on the substrate 110 is located within the projection of the second opening 22 on the substrate 110, so b1≥0 and b2≥0.

[0063] The display panel provided by the present disclosure provides a first refractive layer and a third refractive layer with a refractive index lower than that of a second refractive layer, and after the light-emitting layer is emitted by the first opening of the pixel definition layer, it irradiates the third refractive layer with the third opening. Part of the light is refracted or totally reflected at the boundary between the first refractive layer and the second refractive layer, changing the light transmission path, improving the light-emitting efficiency of the first viewing angle (normal viewing angle) to a certain extent, and improving the light-emitting of the second viewing angle (side viewing angle); and part of the light is refracted or totally reflected at the boundary between the third refractive layer and the second refractive layer, which can also change the light transmission path, improve the light-emitting of the first viewing angle, and reduce the light-emitting of the second viewing angle. Since multiple openings exist in the present solution, the transmission paths of light emitted at different positions can be fully adjusted to better improve the emission of light at different angles. By adjusting the distance between the openings in different directions, the emission of light in different directions can be controlled to avoid the influence of light in a specific direction on the driver's viewing of the display panel, and the light-emitting efficiency of the first viewing angle can be improved to ensure the display effect of the panel.

[0064] In some embodiments, continuing to refer to FIGS. 1-4, in a direction parallel to the plane on which the substrate 110 lies, the edge of the third opening 23 and the edge of the first opening 21 have a fifth interval distance c1 in the first direction D1, and the edge of the third opening 23 and the edge of the first opening 21 have a sixth interval distance c2 in the second direction D2; c1 = c2, and b1 > b2.

[0065] Exemplarily, the third refractive layer 160 includes the third opening 23, and the projection of the first opening 21 on the substrate 110 is located within the projection of the third opening 23 on the substrate 110, so that, in a direction parallel to the plane on which the substrate 110 lies, the edge of the third opening 23 and the edge of the first opening 21 have a fifth interval distance c1 in the first direction D1, and the edge of the third opening 23 and the edge of the first opening 21 have a sixth interval distance c2 in the second direction D2, and the first direction D1 intersects the second direction D2. In the embodiments of the present disclosure, when the differentiation design is performed, c1 = c2, and b1 > b2, that is, the fifth interval distance c1 of the edge of the third opening 23 formed by the third refractive layer 160 and the edge of the first opening 21 in the first direction D1 is equal to the sixth interval distance c2 in the second direction; and the fourth interval distance b2 of the edge of the third opening 23 and the edge of the second opening 22 in the second direction D2 is greater than the third interval distance b1 in the first direction D1.

[0066] When the edge of the third opening 23 and the edge of the second opening 22 have different third interval distances b1 in the first direction D1, the light brightness and the light extraction efficiency at different viewing angles of the light emitted along the first direction D1 are different, and similarly, when the third opening 23 and the second opening 22 have different fourth interval distances b2 in the second direction D2, the light brightness and the light extraction efficiency at different viewing angles of the light emitted along the second direction D2 are also different. Therefore, the embodiments of the present disclosure differentiate the interval distance between the edge of the third opening 23 of the third refractive layer 160 and the edge of the second opening 22 of the first refractive layer 140, and the interval distance between the edge of the third opening 23 of the third refractive layer 160 and the edge of the first opening 21 in each direction is the same, so as to adjust the transmission path of the light emitted by the light-emitting layer, and meet the display requirements of different directions of the display panel in actual applications.

[0067] For example, the display panel is used as a display screen of a vehicle, the first direction D1 represents the left and right sides of the screen (the directions where the driver and the copilot are located), and the second direction D2 represents the upper and lower sides of the screen. Since the driver and the copilot will watch the display panel from the left and right sides of the screen to obtain the display content to ensure safe driving, the third interval distance b1 should be as large as possible to avoid the light being blocked by the first refractive layer 140, so that the driver and the copilot cannot watch the display content on the two sides. The light emitted by the screen in the second direction D2 will be reflected on the front windshield and then reflected on the display panel, which will affect the display effect of the panel and then interfere with the driver or the copilot, so the fourth interval distance b2 can be small, the light brightness of the second viewing angle in the second direction D2 is reduced, and the light of the second viewing angle converges to the first viewing angle, so b1>b2.

[0068] Due to the stacked MLP structure, the first refractive layer and the second refractive layer form an MLP structure, and the second refractive layer and the third refractive layer form another MLP, both of which can adjust the transmission path of the light emitted by the light-emitting layer, so there are various ways to design the openings.

[0069] In some embodiments, FIG. 5 is another enlarged view of the partial structure of FIG. 1 provided by an embodiment of the present disclosure. Referring to FIG. 5, in the direction parallel to the plane where the substrate is located, the edge of the third opening and the edge of the first opening have a fifth interval distance c1 in the first direction, and the edge of the third opening and the edge of the first opening have a sixth interval distance c2 in the second direction; c1>c2, and b1=b2.

[0070] For example, the third refractive layer includes a third opening 23, and the first opening 21 is located in the projection of the third opening 23 on the substrate, so that, in the direction parallel to the plane where the substrate is located, the edge of the third opening 23 and the edge of the first opening 21 have a fifth interval distance c1 in the first direction D1, and the edge of the third opening 23 and the edge of the first opening 21 have a sixth interval distance c2 in the second direction D2, and the first direction D1 intersects the second direction D2. In the embodiments of the present disclosure, when the transmission path of the light is adjusted by differentiating the design of each opening, b1=b2 and c1>c2 can be achieved, that is, the third interval distance b1 in the first direction D1 between the edge of the third opening 23 formed by the third refractive layer and the edge of the second opening 22 of the first refractive layer is equal to the fourth interval distance b2 in the second direction D2, and the fifth interval distance c1 in the first direction between the edge of the third opening 23 and the edge of the first opening 21 is greater than the sixth interval distance c2 in the second direction.

[0071] When the edge of the third opening 23 and the edge of the first opening 21 have different fifth interval distances c1 in the first direction D1, the light brightness and the light extraction efficiency of different viewing angles of the light emitted in the first direction D1 are different. Similarly, when the edge of the third opening 23 and the edge of the first opening 21 have different sixth interval distances c2 in the second direction D2, the light brightness and the light extraction efficiency of different viewing angles of the light emitted in the second direction D2 are also different. Therefore, the interval distance between the edge of the third opening 23 of the third refractive layer and the edge of the first opening 21 is designed to be different in the embodiment of the present disclosure, and the interval distance between the edge of the third opening 23 of the third refractive layer and the edge of the second opening 22 of the first refractive layer is the same in each direction, so as to adjust the transmission path of the light emitted by the light-emitting layer and meet the display requirements of different directions of the display panel in actual application.

[0072] Continuing to take the display panel as an example of a vehicle display screen, the first direction D1 represents the left and right sides of the screen (the directions of the driver and the copilot), and the second direction D2 represents the upper and lower sides of the screen. Therefore, the fifth interval distance c1 is as large as possible, so that the driver or the copilot can easily watch the display panel from the left and right sides of the screen and obtain the display content, and the light is not blocked by the third refractive layer, and the driver and the copilot cannot watch the display content on the two sides. The sixth interval distance c2 can be small, the light brightness of the second viewing angle in the second direction D2 is reduced, and the light of the second viewing angle converges to the first viewing angle, so that c1>c2.

[0073] In some embodiments, FIG. 6 is another enlarged view of a partial structure of FIG. 1 provided by an embodiment of the present disclosure. Referring to FIG. 6, in the direction parallel to the plane where the substrate is located, the edge of the third opening and the edge of the first opening have a fifth interval distance c1 in the first direction, and the edge of the third opening and the edge of the first opening have a sixth interval distance c2 in the second direction; c1>c2, and b1>b2.

[0074] Exemplarily, the interval distance between the edge of the third opening 23 of the third refractive layer and the edge of the second opening 22 of the first refractive layer is designed to be different, and the interval distance between the edge of the third opening 23 of the third refractive layer and the edge of the first opening 21 is designed to be different, so as to adjust the transmission path of the light.

[0075] Taking the display panel as an example of the vehicle display screen, the first direction D1 represents the left and right sides of the screen (the direction of the driver and the copilot), and the second direction D2 represents the upper and lower sides of the screen. When the third interval distance b1 and the fifth interval distance c1 in the first direction D1 are larger, the light rays emitted outward at various angles of the light-emitting layer are not blocked by the first refractive layer and the third refractive layer, the light ray brightness of the left and right sides of the display panel is not weakened, and the emitted light rays are refracted or totally reflected at the boundary between the first refractive layer and the second refractive layer, or at the boundary between the third refractive layer and the second refractive layer, the light rays of the second viewing angle converge to the first viewing angle, improve the light-emitting efficiency of the first viewing angle, facilitate the driver or the copilot to view the display panel from the left and right sides of the screen and obtain the display content, avoid the light rays being blocked by the third refractive layer, and the driver and the copilot cannot view the display content on the two sides. When the fourth interval distance b2 and the sixth interval distance c2 in the second direction D2 are smaller, the light-emitting brightness of the left and right sides of the display panel in the second direction is reduced, thereby reducing the reflection of the light rays at the front windshield, avoiding the reflected light rays affecting the display of the panel, and the light rays of the second viewing angle can converge to the first viewing angle, improving the light-emitting efficiency of the first viewing angle. Therefore, c1>c2, and b1>b2.

[0076] In some embodiments, FIG. 7 is another enlarged view of the partial structure of FIG. 1 provided by an embodiment of the present disclosure. Referring to FIG. 7, in the direction parallel to the plane where the substrate is located, the edges of the second opening 22 and the edges of the first opening 21 have opposite first and second distances a11 and a12 in the first direction D1; wherein a11>a12.

[0077] Exemplarily, taking the display panel of the vehicle as an example, the display panel is usually arranged between the driver's seat and the copilot's seat. In the direction parallel to the plane where the substrate is located, the edges of the second opening 22 formed by the first refractive layer and the edges of the first opening 21 formed by the pixel definition layer have opposite first and second distances a11 and a12 in the first direction D1, for example, the side where the first distance a11 is located is the left side of the display panel, i.e. the side where the driver is located, and the side where the second distance a12 is located is the right side of the display panel, i.e. the side where the copilot is located. The display panel can display data such as road conditions in front, navigation map or vehicle driving parameters, and the driver needs to obtain the display content to ensure driving safety, while the copilot has less demand for the above. Therefore, when the refractive layers are designed differently, the first distance a11 of the edges of the second opening 22 and the edges of the first opening 21 in the first direction D1 can be greater than or equal to the second distance a12, i.e. a11>a12.

[0078] When a11=a12, the first distance a11 of the edge of the second opening 22 and the edge of the first opening 21 in the first direction D1 is equal to the second distance a12, the light emitted on the opposite sides of the first direction D1 has the same brightness, the light emitting efficiency is the same, and the display screen viewed by the driver and the copilot is the same. When a11>a12, the first distance a11 of the edge of the second opening 22 and the edge of the first opening 21 in the first direction D1 is greater than the second distance a12, the first distance a11 is located on the side of the driver, and the second distance a12 is located on the side of the copilot. The light emitted by the light emitting layer on the side of the driver is less shielded, so the light has a higher brightness, and the driver obtains a better picture effect, which better assists the driver in controlling the vehicle.

[0079] In some embodiments, FIG. 8 is an enlarged view of a partial structure of FIG. 1 according to an embodiment of the present disclosure. Referring to FIG. 8, in the direction parallel to the plane in which the substrate is located, the edge of the second opening 22 and the edge of the first opening 21 have opposite first and second distances a11 and a12 in the first direction D1.

[0080] In the direction parallel to the plane in which the substrate is located, the edge of the third opening 23 and the edge of the second opening 22 have opposite third and fourth distances b11 and b12 in the first direction. Wherein a11≥a12, b11≥b12.

[0081] For example, when the refractive layer is designed differently, the first distance a11 of the edge of the second opening 22 and the edge of the first opening 21 in the first direction D1 can be greater than or equal to the second distance a12, i.e., a11≥a12. To meet the needs of the vehicle display panel, when a11=a12, the first distance a11 of the edge of the second opening 22 and the edge of the first opening 21 in the first direction D1 is equal to the second distance a12, the light emitted on the opposite sides of the first direction D1 has the same brightness, the light emitting efficiency is the same, and the display screen viewed by the driver and the copilot is the same. When a11>a12, the first distance a11 of the edge of the second opening 22 and the edge of the first opening 21 in the first direction D1 is greater than the second distance a12, the first distance a11 is located on the side of the driver, and the second distance a12 is located on the side of the copilot. The light emitted by the light emitting layer on the side of the driver is less shielded, so the light has a higher brightness, and the driver obtains a better picture effect, which better assists the driver in controlling the vehicle.

[0082] Based on this, the edge of the third opening 23 and the edge of the second opening 22 can also be designed differently in the first direction with a third distance b11 and a fourth distance b12. Wherein, the third distance b11 is on the left side of the display panel, that is, the driver side, and the fourth distance b12 is on the right side of the display panel, that is, the co-pilot side. Similarly, the edge of the third opening 23 and the edge of the second opening 22 can be made to have a third distance b11 in the first direction relative to the fourth distance b12, that is, b11≥b12, to meet the demand of the vehicle driver to obtain the display content more easily.

[0083] It should be noted that the first direction and the second direction mentioned in the above embodiments and the drawings are only optional examples, and the first direction and the second direction can also point to other directions, as long as they intersect. When the openings of the refractive layer are differentially involved, the light brightness and light efficiency can be adjusted according to the actual needs, so as to match the corresponding differential openings. The above embodiments are for explanation and illustration, and do not mean that they can only be designed in the above manner. In other fields of display panels, there are different implementation manners, but the principles are the same.

[0084] In some embodiments, referring to FIGS. 3 and 4, the angle between the sidewall of the second opening 22 and the substrate 110 is in the range of 70°-80°.

[0085] There is a certain angle between the sidewall of the second opening 22 of the first refractive layer 140 and the substrate 110, so that when the light-emitting layer 130 in the first opening 21 emits light, the light changes the transmission path at the sidewall of the second opening 22. In order to improve the light efficiency of the first viewing angle, the light emitted by the light-emitting layer 130 from the second viewing angle should be adjusted to be emitted from the first viewing angle. The angle between the sidewall of the second opening 22 and the substrate 110 is set in the range of 70°-80°, which can better converge the light emitted by the light-emitting layer 130 in the first opening 21 to both sides at a large angle (second viewing angle direction). If the angle is too large or too small, the improvement of the light emission angle is poor, and the material used by the refractive layer is also in the angle range. The angle formed by the first viewing angle direction and the direction perpendicular to the plane of the substrate is smaller than the angle formed by the second viewing angle direction and the direction perpendicular to the plane of the substrate, that is, the first viewing angle is small-angle emission (front view angle), and the second viewing angle is large-angle emission (side view angle).

[0086] Optionally, the angle range between the sidewall of the third opening and the substrate can be 70°-80°. Similarly, the sidewall of the third opening of the third refractive layer also has a certain angle with the substrate, so as to change the transmission path of the light and improve the light efficiency of the first viewing angle. Therefore, similar to the principle of the above embodiments, the angle range can also be set in the range of 70°-80°.

[0087] In some other embodiments, the angle between the sidewall of the second opening and the substrate can also be in other ranges, which can be selected according to actual application scenarios, process capability, materials, etc., and the embodiments of the present disclosure do not limit this.

[0088] In some embodiments, FIG. 9 is a schematic view of the film layer structure of FIG. 1 taken along A1A2, and FIG. 10 is a schematic view of the film layer structure of FIG. 1 taken along B1B2, provided by the embodiments of the present disclosure. Referring to FIGS. 9 and 10, the sidewall of the second opening 22 is in a stepped structure.

[0089] For example, the sidewall of the second opening 22 is in a stepped structure. After being arranged in the stepped structure, the light emitted by the light-emitting layer 130 and irradiated on the stepped structure will also be refracted or totally reflected, so as to change the transmission path of the light. In some cases, a multi-layer refraction condition can also be formed, so as to improve the transmission path of the light at different positions. FIGS. 9 and 10 only show one optional stepped structure, and the stepped structure can also be arranged in multiple steps, and the embodiments of the present disclosure do not limit this. Optionally, the sidewall of the third opening can also be in a stepped structure, and the specific structure can be referred to the sidewall of the second opening. The stepped structure of the third opening is not shown in the figure.

[0090] In some embodiments, FIG. 11 is a schematic view of the film layer structure of FIG. 1 taken along A1A2, and FIG. 12 is a schematic view of the film layer structure of FIG. 1 taken along B1B2, provided by the embodiments of the present disclosure. Referring to FIGS. 11 and 12, the display panel includes a fourth refractive layer 170, which is located between the first refractive layer 140 and the third refractive layer 160.

[0091] For example, the refractive index of the fourth refractive layer 170 is higher than that of the first refractive layer 140 and the third refractive layer 160. The fourth refractive layer 170 is located between the first refractive layer 140 and the third refractive layer 160, so as to raise the position of the first refractive layer 140. Some light emitted by the light-emitting layer 130 along the second viewing angle direction can irradiate on the sidewall of the first refractive layer 140, and then be emitted toward the first viewing angle direction, so as to change the transmission path of the light and improve the light-emitting efficiency of the first viewing angle.

[0092] For example, the refractive material adopted by the fourth refractive layer 170 can be the same as the refractive material adopted by the second refractive layer 150, and the embodiments of the present disclosure do not limit the type of the material.

[0093] In some embodiments, continuing to refer to FIGS. 11 and 12, the thickness of the fourth refractive layer 170 ranges from 0 to 2.2 μm.

[0094] According to actual process capability and material limitation, the thickness of the fourth refractive layer 170 can range from 0 to 2.2 μm to increase the height of the first refractive layer 140 and further improve the light transmission path. When the thickness of the fourth refractive layer 170 is in this range, the loss rate of large-angle light is small, and more large-angle (second viewing angle direction) light can change the transmission path at the sidewall of the first refractive layer 140 to converge toward the first viewing angle, thereby improving the first viewing angle light extraction efficiency.

[0095] In some embodiments, with continued reference to FIGS. 3 and 4, the refractive index of the first refractive layer 140 is less than or equal to the refractive index of the third refractive layer 160.

[0096] The first refractive layer 140 and the third refractive layer 160 are both low-refractive layers with a refractive index less than that of the second refractive layer 150 to form a stacked MLP structure, change the light transmission direction, and improve the first viewing angle (normal viewing angle) light extraction efficiency. The refractive index of the first refractive layer 140 can be the same as that of the third refractive layer 160 and can be formed by the same low-refractive material. However, the refractive index of the first refractive layer 140 can also be different from that of the third refractive layer 160. Since the first refractive layer 140 is located on the side of the third refractive layer 160 away from the substrate 110, when the refractive index of the first refractive layer 140 is less than that of the third refractive layer 160, the light emitted by the light-emitting layer 130 in the first opening 21 toward both sides at a large angle (second viewing angle direction) can be converged toward the normal viewing angle (first viewing angle) as much as possible, thereby improving the normal viewing angle light extraction efficiency.

[0097] It should be noted that in actual application scenarios, the smaller the refractive index of the first refractive layer and the second refractive layer, the better, to improve the second viewing angle light extraction, converge it toward the first viewing angle, and improve the first viewing angle light extraction efficiency.

[0098] In some embodiments, FIG. 13 is a top view structural schematic diagram of another display panel according to an embodiment of the present disclosure. Referring to FIG. 13, the light-emitting layer includes a plurality of light-emitting units 30; the light-emitting unit 30 includes at least first and second sub-light-emitting units 31 and 32 of different colors; the first sub-light-emitting unit 31 has a luminance L1 and the second sub-light-emitting unit 32 has a luminance L2 in the first viewing angle, and the first sub-light-emitting unit 31 has a luminance L3 and the second sub-light-emitting unit 32 has a luminance L4 in the second viewing angle.

[0099] wherein (L1-L3) / L1 > (L2-L4) / L2; the angle formed by the direction of the first viewing angle and the direction perpendicular to the plane on which the substrate lies is smaller than the angle formed by the direction of the second viewing angle and the direction perpendicular to the plane on which the substrate lies.

[0100] Exemplarily, the light-emitting layer of the display panel includes a plurality of light-emitting units 30, the light-emitting units 30 are arranged in an array, and only part of the light-emitting units 30 are shown in the figure. Among them, the light-emitting unit 30 at least includes first sub-light-emitting units 31 of different colors and second sub-light-emitting units 32, for example, the first sub-light-emitting units 31 are green light-emitting units G, and the second sub-light-emitting units 32 include red light-emitting units R and / or blue light-emitting units B, and in this embodiment, the second sub-light-emitting units 32 include red light-emitting units R and blue light-emitting units B. Among them, the green light-emitting units G can display green, the red light-emitting units R can display red, and the blue light-emitting units B can display blue. In addition, the light-emitting unit 30 can also include other sub-light-emitting units that do not display red, green and blue, and the present disclosure does not make specific limitations on this.

[0101] The first opening 21, the second opening 22 and the third opening 23 surround the light-emitting unit. The planar shape of each opening is approximately a polygon including a plurality of sides, for example, can be a rectangle, but considering the influence of the actual process, the corner of each opening can be chamfered into a curve to exist in a round shape. In other embodiments, the planar shape of each opening can also be a rhombus or other quadrilateral shape, and the shape of each opening is not specifically limited in the embodiments of the present disclosure. However, the shapes of the first opening 21, the second opening 22 and the third opening 23 surrounding the same light-emitting unit 30 are the same or similar.

[0102] When viewing the light-emitting unit 30 from different viewing angles, each light-emitting unit 30 will exhibit different degrees of brightness attenuation, thereby causing the brightness displayed by the light-emitting unit 30 to be different. For example, under a first viewing angle, the brightness of the first sub-light-emitting unit 31 is L1, and the brightness of the second sub-light-emitting unit 32 is L2, while under a second viewing angle, the brightness of the first sub-light-emitting unit 31 is L3, and the brightness of the second sub-light-emitting unit 32 is L4. Among them, the included angle formed by the first viewing angle direction and the direction perpendicular to the plane where the substrate is located is smaller than the included angle formed by the second viewing angle direction and the direction perpendicular to the plane where the substrate is located, which can be understood as the first viewing angle being a normal viewing angle and the second viewing angle being a side viewing angle. Under different viewing angles, the brightness of the first sub-light-emitting unit 31 and the second sub-light-emitting unit 32 is different, which will cause the synthesized light to have a certain color deviation, affecting the display effect. According to the brightness of different viewing angles, the light color deviation can be calculated, for example, (L1-L3) / L1>(L2-L4) / L2, then it can be determined that the color deviation will cause the synthesized light to deviate towards the color corresponding to the first sub-light-emitting unit 31.

[0103] FIG. 13 is a top view of a display panel according to an embodiment of the present disclosure. As shown in FIG. 13, the display panel includes a plurality of light emitting units 30. The light emitting units 30 are arranged in a diamond pattern. The light emitting units 30 include first light emitting units 31 and second light emitting units 32. The first light emitting units 31 and the second light emitting units 32 are different in color. The light emitting units 30 each include a first opening 21, a second opening 22, and a third opening 23. The first direction is D1, and the second direction is D2. The first direction D1 intersects the second direction D2.

[0104] In some embodiments, FIG. 16 is a partial enlarged view of FIG. 13. In the first direction D1, the first interval distance around the first light emitting units 31 is m1, and the first interval distance around the second light emitting units 32 is n1, and m1 < n1.

[0105] For example, in the first direction D1, the color cast of the light is the color displayed by the first light emitting units 31. The first interval distance around the first light emitting units 31 is m1, and the first interval distance around the second light emitting units 32 is n1. In this case, m1 < n1. The first interval distance is the interval distance between the first opening 21 and the second opening 22 in the first direction D1. The larger the interval distance, the larger the second opening 22 of the first refractive layer, and the brighter the light. When the first interval distances of the light emitting units 30 are all the same, and in the first direction D1, the color cast of the light is the color displayed by the first light emitting units 31, the second opening 22 of the first light emitting units 31 can be reduced, i.e., m1 < n1, so that the brightness of the light of the first light emitting units 31 is reduced, and the color cast of the light is improved. For example, the first light emitting units 31 are green light emitting units G, and the second light emitting units 32 include red light emitting units R and blue light emitting units B. In the first direction D1, the light emitted by the green light emitting units G, the red light emitting units R, and the blue light emitting units B is greenish white light. In this case, the first interval distance of the green light emitting units G needs to be reduced, and be smaller than the first interval distances of the red light emitting units R and the blue light emitting units B.

[0106] Similarly, in the second direction D2, the color cast of the light rays is the color displayed by the first sub-emitting unit 31, and the second interval distance around the first sub-emitting unit 31 is m2, and the second interval distance around the second sub-emitting unit 32 is n2, then m2 < n2 is required.

[0107] The second interval distance is the interval distance between the first opening 21 and the second opening 22 in the second direction D2, the larger the interval distance, the larger the second opening 22 of the first refractive layer, and the brighter the light rays. When the second interval distance of each emitting unit 30 is the same, in the second direction D2, the color cast of the light rays is the color displayed by the first sub-emitting unit 31, then the second opening 22 of the first sub-emitting unit 31 can be reduced, that is, m2 < n2, so that the brightness of the light rays of the first sub-emitting unit 31 is reduced, and the color cast problem of the light rays is improved.

[0108] Optionally, in the first direction, the third interval distance around the first sub-emitting unit is m3, the third interval distance around the second sub-emitting unit is n3, and m3 < n3; and / or, in the second direction, the fourth interval distance around the first sub-emitting unit is m4, the fourth interval distance around the second sub-emitting unit is n4, and m4 < n4. The above embodiment is to improve the color cast by adjusting the interval distance between the first opening edge and the second opening edge, and in other embodiments, the interval distance between the first opening edge and the third opening edge can also be adjusted to improve the color cast. The specific principle is the same as the above embodiment, which will not be repeated here.

[0109] In some embodiments, FIG. 17 is a top view structural schematic diagram of another display panel provided by an embodiment of the present disclosure, referring to FIG. 17, in the first direction D1, the number of second openings around the first sub-emitting unit in the first refractive layer is p1, and the number of second openings around the second sub-emitting unit in the first refractive layer is p2, and p1 > p2.

[0110] Exemplarily, the color cast problem of display can be solved by adjusting the number of the second openings 22 in the first refractive layer around the light emitting unit 30. If the color cast occurs at the second viewing angle, the color cast display is biased to the color corresponding to the first sub-light emitting unit 31, and more second openings 22 can be set to weaken the light intensity of the second viewing angle. In the first direction D1, the number of the second openings 22 in the first refractive layer around the first sub-light emitting unit 31 is p1, and the number of the second openings 22 in the first refractive layer around the second sub-light emitting unit 32 is p2, and p1 > p2. For example, the first sub-light emitting unit 31 is a green light emitting unit G, the second sub-light emitting unit 32 is a red light emitting unit R and a blue light emitting unit B. At the second viewing angle, the light color cast display is green, and therefore, in the first direction D1, the number of the second openings 22 around the green light emitting unit G is greater than the number of the second openings 22 around the red light emitting unit R, and greater than the number of the second openings 22 around the blue light emitting unit B, so as to weaken the light emission of the green light emitting unit G at the second viewing angle (large viewing angle direction), reduce the light intensity of the green light at the second viewing angle, and thus improve the color cast problem.

[0111] Optionally, in the second direction, the number of the second openings in the first refractive layer around the first sub-light emitting unit is p3, the number of the second openings in the first refractive layer around the second sub-light emitting unit is p4, and p3 > p4.

[0112] It should be noted that the above embodiment adjusts the number of the second openings to improve the color cast problem, and in other embodiments, the number of the third openings can also be adjusted to improve the color cast effect, and the specific principle is similar to the above embodiment.

[0113] In some embodiments, referring to FIGS. 1 to 4, the first openings 21 and the second openings 22 are both rectangular.

[0114] Exemplarily, the first openings 21 formed on the pixel definition layer 120 are rectangular, and the second openings 22 formed on the first refractive layer 140 are also rectangular. The rectangle includes four sides, and the two sides extending in the same direction are parallel to each other, which is relatively easy in the manufacturing process. Therefore, making the first openings 21 and the second openings 22 both rectangular can improve the manufacturing efficiency. Similarly, the third openings 23 are also rectangular, which further improves the manufacturing efficiency. In actual scenarios, the influence of actual process is also considered, and the corners of each opening can be chamfered into a curve, in a rounded shape. In other embodiments, each opening can also be other shapes, and the scheme provided by the present disclosure is only one optional embodiment.

[0115] In some embodiments, FIG. 18 is a top view of another display panel according to embodiments of the present disclosure; FIG. 19 is an enlarged view of a partial structure of FIG. 18 according to embodiments of the present disclosure; FIG. 20 is a top view of another display panel according to embodiments of the present disclosure; FIG. 21 is an enlarged view of a partial structure of FIG. 20 according to embodiments of the present disclosure; referring to FIGS. 18-21, the first openings 21 and the second openings 22 are circular or elliptical; the centers of the first openings 21 and the second openings 22 do not coincide.

[0116] For example, as shown in FIGS. 18 and 19, the first direction is D1, the second direction is D2, the first openings 21 formed on the pixel definition layer are circular, the second openings 22 formed on the first refractive layer are also circular, and the centers of the first openings 21 and the second openings 22 do not coincide, so that the interval distances between the edges of the first openings 21 and the edges of the second openings 22 in different directions are different, thereby realizing the differential design of the openings to adjust the light brightness in different directions and the light extraction efficiency of the first viewing angle. In addition, the third openings 23 formed on the third refractive layer can also be circular, so that the centers of the third openings 23 and the first openings 21 do not coincide, and the interval distances between the edges of the third openings 23 and the edges of the first openings in different directions are different, so that the interval distances can also be adjusted to adjust the light brightness in different directions and the light extraction efficiency of the first viewing angle.

[0117] For example, as shown in FIGS. 20 and 21, the first direction is D1, the second direction is D2, the first openings 21 formed on the pixel definition layer are elliptical, the second openings 22 formed on the first refractive layer are also elliptical, and the interval distances between the edges of the first openings 21 and the edges of the second openings 22 in different directions can also be different to adjust the light brightness in different directions and the light extraction efficiency of the first viewing angle. In addition, the third openings 23 formed on the third refractive layer can also be circular, so that the interval distances between the edges of the third openings 23 and the edges of the first openings in different directions are different, and the interval distances can be adjusted to adjust the light brightness in different directions and the light extraction efficiency of the first viewing angle.

[0118] Since each opening is circular or elliptical, even on the same side in the same direction, there are multiple interval distances, so the longest distance or the shortest distance in each interval distance on the corresponding side can be selected. For example, in the direction parallel to the plane where the substrate is located, the edges of the second openings 22 and the edges of the first openings 21 have multiple first distances and second distances in the first direction D1, so that the shortest or longest distance can be selected as the first distance and the second distance to unify the standard. It should be noted that the present disclosure does not limit how to select the final interval distance, and only the unified standard is required.

[0119] The display device provided by the display panel has the technical features of the display panel provided by the embodiments of the present disclosure, and can achieve the beneficial effects of the display panel provided by the embodiments of the present disclosure. For the same parts, refer to the description of the display panel provided by the embodiments of the present disclosure, which will not be repeated here.

[0120] Exemplarily, FIG. 22 is a structural schematic diagram of a display device provided by an embodiment of the present disclosure. As shown in FIG. 22, the display device provided by the embodiment of the present disclosure includes the display panel 100 provided by any of the above embodiments of the present disclosure. The embodiment provided in FIG. 22 only takes a vehicle-mounted display screen as an example to describe the display device. The vehicle-mounted display screen in FIG. 22 is located in the vehicle cabin, and one side of the display screen is the driver's seat, i.e., the side where the steering wheel is arranged; the other side is the front passenger seat. It can be understood that the display device provided by the embodiments of the present disclosure can be any electronic product with display function, including but not limited to the following categories: mobile phone, television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interaction terminal, etc., and the embodiments of the present disclosure do not make special limitations on this.

[0121] The display device provided by the embodiments of the present disclosure includes the above display panel, and thus the same technical problems of the above display panel embodiments can also be solved, and the same technical effects can be achieved, which will not be repeated here.

[0122] It should be understood by those skilled in the art that the above embodiments are exemplary but not limiting. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the drawings, the specification and the claims, those skilled in the art should understand and implement other changed embodiments of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; the article is intended to include one or more articles and can be used interchangeably with "one or more articles"; the terms "first", "second" are used to indicate names and not to indicate any specific order. Any reference signs in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a single hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A display panel, comprising: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer comprising a plurality of first openings; a light emitting layer located on a side of the pixel definition layer away from the substrate, the light emitting layer being disposed within the first openings; a first refractive layer located on a side of the light emitting layer away from the substrate, the first refractive layer comprising a plurality of second openings, a projection of the first openings on the substrate being within a projection of the second openings on the substrate; a second refractive layer located on a side of the first refractive layer away from the substrate and filling the second openings, a refractive index of the second refractive layer being greater than a refractive index of the first refractive layer; in a direction parallel to a plane on which the substrate lies, edges of the second openings and edges of the first openings have a first interval distance a1 in a first direction, and edges of the second openings and edges of the first openings have a second interval distance a2 in a second direction, the first direction intersecting the second direction; a third refractive layer located between the first refractive layer and the light emitting layer, the third refractive layer comprising a plurality of third openings, a projection of the first openings on the substrate being within a projection of the third openings on the substrate, and a projection of the third openings on the substrate being within a projection of the second openings on the substrate; the projection of the third openings on the substrate overlaps the projection of the second openings on the substrate; the second refractive layer fills the third openings; a refractive index of the second refractive layer is greater than a refractive index of the third refractive layer; in a direction parallel to a plane on which the substrate lies, edges of the third openings and edges of the second openings have a third interval distance b1 in a first direction, and edges of the third openings and edges of the second openings have a fourth interval distance b2 in a second direction; wherein a1≥0, a2≥0, a1≠a2, b1≥0, b2≥0. in a direction parallel to a plane on which the substrate lies, edges of the third openings and edges of the first openings have a fifth interval distance c1 in the first direction, and edges of the third openings and edges of the first openings have a sixth interval distance c2 in the second direction; c1=c2, and b1>b2. in a direction parallel to a plane on which the substrate lies, edges of the third openings and edges of the first openings have a fifth interval distance c1 in a first direction, and edges of the third openings and edges of the first openings have a sixth interval distance c2 in a second direction; c1>c2, and b1=b2. in a direction parallel to a plane on which the substrate lies, edges of the third openings and edges of the first openings have a fifth interval distance c1 in a first direction, and edges of the third openings and edges of the first openings have a sixth interval distance c2 in a second direction; c1>c2, and b1>b2. in a direction parallel to a plane on which the substrate lies, edges of the second openings and edges of the first openings have a first distance a11 and a second distance a12 in the first direction, the first distance a11 and the second distance a12 being opposite to each other; wherein a11≥a12. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The display panel of claim 1, wherein, ​ ​ 3. The display panel of claim 1, wherein, ​ ​ 4. The display panel of claim 1, wherein, ​ ​ 5. The display panel of claim 1, wherein, ​ ​ 6. The display panel of claim 1, wherein, In a direction parallel to a plane where the substrate is located, edges of the second opening and edges of the first opening have opposite first and second distances a11 and a12 in the first direction; In a direction parallel to a plane where the substrate is located, edges of the third opening and edges of the second opening have opposite third and fourth distances b11 and b12 in the first direction; Wherein, a11≥a12, b11≥b12.

7. The display panel of claim 1, wherein, An angle between a sidewall of the second opening and the substrate ranges from 70° to 80°.

8. The display panel of claim 1, wherein, The sidewall of the second opening is in a stepped structure.

9. The display panel of claim 1, wherein, The display panel comprises a fourth refractive layer between the first refractive layer and the third refractive layer.

10. The display panel of claim 9, wherein, A thickness of the fourth refractive layer ranges from 0 to 2.2 μm.

11. The display panel of claim 1, wherein, A refractive index of the first refractive layer is less than or equal to a refractive index of the third refractive layer.

12. The display panel of claim 1, wherein, The light-emitting layer comprises a plurality of light-emitting units; the light-emitting units comprise at least first and second light-emitting sub-units of different colors; in a first viewing angle, the first light-emitting sub-unit has a brightness of L1 and the second light-emitting sub-unit has a brightness of L2; in a second viewing angle, the first light-emitting sub-unit has a brightness of L3 and the second light-emitting sub-unit has a brightness of L4; Wherein, (L1-L3) / L1>(L2-L4) / L2; an angle formed by the first viewing angle and a direction perpendicular to a plane where the substrate is located is less than an angle formed by the second viewing angle and the direction perpendicular to the plane where the substrate is located.

13. The display panel of claim 12, wherein, In the first direction, the first spacing distance around the first light-emitting sub-unit is m1 and the first spacing distance around the second light-emitting sub-unit is n1, and m1 And / or, in the second direction, the second spacing distance around the first light-emitting sub-unit is m2 and the second spacing distance around the second light-emitting sub-unit is n2, and m2 14. The display panel of claim 13, wherein, In the first direction, a number of the second openings in the first refractive layer around the first light-emitting sub-unit is p1 and a number of the second openings in the first refractive layer around the second light-emitting sub-unit is p2, and p1>p2.

15. The display panel of claim 1, wherein, The first opening and the second opening are both rectangular.

16. The display panel of claim 1, wherein, The first opening and the second opening are circular or elliptical; and centers of the first opening and the second opening do not coincide.

17. A display device comprising the display panel of any one of claims 1-16.

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