Display panel, display device and manufacturing method of aspherical cylindrical lens

Abstract

The application discloses a display panel, a display device and a manufacturing method of an aspheric cylindrical lens, and relates to the technical field of display. The display panel comprises a first substrate, a grating and a light-emitting layer. The grating comprises a plurality of arrayed grating units, and the grating is located on one side of the first substrate. The light-emitting layer comprises a plurality of arrayed light-emitting units, and the light-emitting layer is located on the side of the grating away from the first substrate or on the side of the first substrate away from the grating. The orthographic projection of one grating unit on the first substrate covers the orthographic projection of at least one light-emitting unit on the first substrate. The grating is arranged, the grating comprises grating units, and the grating units cover at least one light-emitting unit, so that the display effect of the 3D display panel is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a display device and a manufacturing method of aspheric cylindrical lens. BACKGROUND

[0002] Nowadays, there is an increasing demand for stereoscopic display devices in the market. Among the many technologies for realizing three-dimensional stereoscopic display, naked-eye stereoscopic display is favored in the field of three-dimensional stereoscopic display because it does not require the viewer to wear glasses.

[0003] At present, the naked-eye stereoscopic display technology has the problem of poor display effect. SUMMARY

[0004] The purpose of the present application is to provide a display panel with good display effect, a display device and a manufacturing method of aspheric cylindrical lens.

[0005] The present application discloses a display panel, which comprises:

[0006] a first substrate;

[0007] a grating comprising a plurality of grating units arranged in an array, the grating being located on one side of the first substrate;

[0008] a light-emitting layer comprising a plurality of light-emitting units arranged in an array, the light-emitting layer being located on the side of the grating away from the first substrate or on the side of the first substrate away from the grating;

[0009] The orthogonal projection of one grating unit on the first substrate covers the orthogonal projection of at least one light-emitting unit on the first substrate.

[0010] In an optional embodiment, the grating unit comprises an aspheric cylindrical lens, the aspheric cylindrical lens comprising a convex surface on the side away from the first substrate and a flat surface adhering to the first substrate.

[0011] In an optional embodiment, the display panel further comprises a second substrate, the second substrate being located on the side of the grating away from the first substrate; liquid crystal is filled between the second substrate and the aspheric cylindrical lens, the refractive index of the liquid crystal along the optical axis direction being equal to the refractive index of the aspheric cylindrical lens; the side of the first substrate close to the second substrate and the side of the second substrate close to the first substrate are both provided with an electrode layer.

[0012] In an optional embodiment, the display panel further comprises a support, the support being arranged between the aspheric cylindrical lens and the second substrate.

[0013] In an optional embodiment, the material of the aspheric cylindrical lens is a photocurable and / or thermocurable resin material.

[0014] In an optional embodiment, the display panel further comprises a second substrate located on the side of the grating away from the first substrate; a first filling structure layer is filled between the second substrate and the first substrate, and the first filling structure layer has an aspheric cylindrical lens-shaped gap with the first substrate, and the gap is filled with liquid crystal; the side of the first substrate close to the second substrate and the side of the second substrate close to the first substrate are both provided with an electrode layer.

[0015] In an optional embodiment, the focal length of the aspheric cylindrical lens is greater than or equal to the distance from the light-emitting layer to the plane of the aspheric cylindrical lens.

[0016] In an optional embodiment, in the cross section perpendicular to the length direction of the aspheric cylindrical lens, the radius of curvature of the surface of the aspheric cylindrical lens gradually decreases from the side close to the first substrate to the side away from the first substrate.

[0017] In an optional embodiment, in the cross section perpendicular to the length direction of the aspheric cylindrical lens, the radius of curvature of the edge of the aspheric cylindrical lens away from the first substrate satisfies R=D / 2+P^2 / (8*D), R is the radius of curvature of a point of the edge of the aspheric cylindrical lens away from the first substrate, D is the minimum distance from the point to the vertex of the aspheric cylindrical lens, and P is the overlapping length of the straight line parallel to the first substrate and the aspheric cylindrical lens.

[0018] In an optional embodiment, the grating unit comprises a cylindrical convex lens and a cylindrical concave lens arranged in a stack, and the side of the cylindrical convex lens close to the cylindrical concave lens is attached to the side of the cylindrical concave lens close to the cylindrical convex lens.

[0019] In an optional embodiment, the display panel further comprises a second substrate located on the side of the grating away from the first substrate; a first filling structure layer is filled between the second substrate and the first substrate, and the first filling structure layer has an aspheric cylindrical lens-shaped gap with the first substrate, and the gap is filled with liquid crystal; the side of the first substrate close to the second substrate and the side of the second substrate close to the first substrate are both provided with an electrode layer.

[0020] In one optional embodiment, the side of the cylindrical convex lens away from the cylindrical concave lens has a first radius of curvature, the side of the cylindrical convex lens near the cylindrical concave lens and the side of the cylindrical concave lens near the cylindrical convex lens have a second radius of curvature, and the side of the cylindrical concave lens away from the cylindrical convex lens has a third radius of curvature; the first radius of curvature, the second radius of curvature and the third radius of curvature are all unequal.

[0021] In one optional embodiment, the grating unit includes a spherical cylindrical lens and an aperture stop; the spherical cylindrical lens includes a paraxial region located in the middle and a faraxial region located at the edge, the paraxial region is attached to the first substrate, and the aperture stop is disposed between the faraxial region and the first substrate.

[0022] This application also discloses a method for manufacturing an aspherical cylindrical lens, which includes:

[0023] Determine the material of the aspherical cylindrical lens and confirm the shrinkage rate of the material;

[0024] The actual dimensions of the aspherical cylindrical lens are designed based on the dimensions of the light-emitting unit.

[0025] The design dimensions of the aspherical cylindrical lens are designed based on the actual dimensions and the shrinkage rate of the material.

[0026] Manufacture the mold according to the design dimensions;

[0027] The aspherical cylindrical lens is manufactured using the mold.

[0028] In an alternative embodiment, confirming the shrinkage rate of the material includes:

[0029] On a cross section perpendicular to the length direction of the aspherical cylindrical lens, the distance from the straight edge to the curved edge is measured every 0.1 to 1 micrometer along the straight edge of the aspherical cylindrical lens in a direction perpendicular to the straight edge.

[0030] This application also discloses a display device, which includes the display panel described above.

[0031] Compared with related technologies, this application improves the display effect of the 3D display panel by setting a grating, which includes grating units and each grating unit covers at least one light-emitting unit.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0034] Figure 1 This is a partial cross-sectional schematic diagram of the display panel of this application in one embodiment.

[0035] Figure 2 This is a partial cross-sectional schematic diagram of the display panel of this application in one embodiment.

[0036] Figure 3 The optical path diagram (left) of the spherical cylindrical lens 15, as well as the beam splitting curves and crosstalk curves (right) for the left and right eyes.

[0037] Figure 4 The image shows the optical path diagram (left) of the aspherical cylindrical lens 11, as well as the beam splitting curves and crosstalk curves for the left and right eyes (right).

[0038] Figure 5 This is a schematic diagram of an embodiment where the display panel of this application is in 2D mode.

[0039] Figure 6 This is a schematic diagram of an embodiment where the display panel of this application is in 3D mode.

[0040] Figure 7 This is a cross-sectional schematic diagram of an aspherical lens of this application in one embodiment.

[0041] Figure 8 This is a schematic diagram of the combined lens of this application in one embodiment.

[0042] Figure 9 This is a partial cross-sectional schematic diagram of the display panel of this application in one embodiment.

[0043] Figure 10 This is a partial cross-sectional schematic diagram of the display panel of this application in one embodiment.

[0044] Figure 11 This is a partial schematic diagram of the display panel of this application in one embodiment.

[0045] Figure 12 This is a schematic diagram showing the design dimensions and actual dimensions of the display panel in this application. Detailed Implementation

[0046] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0047] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0048] like Figure 1 As shown, this application provides a display panel including a first substrate 100, a grating 200, and a light-emitting layer 400. The grating 200 is located on one side of the first substrate 100. The grating 200 includes a plurality of grating units 10 arranged in an array. The light-emitting layer 400 is located on the side of the grating 200 away from the first substrate 100 or on the side of the first substrate 100 away from the grating 200. The light-emitting layer 400 includes a plurality of light-emitting units 410 arranged in an array. The orthographic projection of one grating unit 10 onto the first substrate 100 at least covers the orthographic projection of one light-emitting unit 410 onto the first substrate 100.

[0049] This application improves the display effect of a 3D display panel by setting a grating, which includes grating units, and each grating unit covers at least one light-emitting unit.

[0050] The following will provide a detailed description of various embodiments of this application that conform to the above-described inventive concept.

[0051] like Figure 1 as well as Figure 2 As shown, the display panel provided in this application includes a light-emitting layer 400 composed of light-emitting units 410 arranged in an array. Optionally, the light-emitting unit 410 can be an LED (Light Emitting Diode) light-emitting unit, an OLED (Organic Light-Emitting Diode) light-emitting unit, a quantum dot light-emitting unit, or an LCD (Liquid Crystal Display) light-emitting unit, etc.

[0052] A first substrate 100 is disposed on one side of the light-emitting layer 400, and the first substrate 100 is disposed at a certain distance from the light-emitting layer 400. In some embodiments, the first substrate 100 can be a flexible or rigid transparent substrate, such as a glass substrate.

[0053] A grating 200 is disposed on one side of the first substrate 100, and the grating 200 is attached to the first substrate 100. The light-emitting layer 400 may be located on the side of the grating 200 away from the first substrate 100, or the light-emitting layer 400 may be located on the side of the first substrate 100 away from the grating 200. The grating 200 includes a plurality of grating units 10 arranged in an array. Each grating unit 10 has its orthographic projection on the first substrate 100 covering at least one orthographic projection of a light-emitting unit 410 on the first substrate 100. Light emitted from the plurality of light-emitting units 410 passes through the grating units 10 and is then projected onto the user's left and right eyes, respectively. Specifically, some of the light-emitting units 410 in the light-emitting layer 400 are configured to provide a first image, and another portion of the light-emitting units 410 are configured to provide a second image. The first and second images are transmitted to the user's left and right eyes, respectively, to create depth of field through the parallax effect of the left and right eye images, thereby producing a stereoscopic display effect. Optionally, the odd-numbered light-emitting units 410 in a certain direction can provide the first image, and the even-numbered light-emitting units 410 can provide the second image.

[0054] like Figure 1 as well as Figure 2 As shown, in some optional embodiments, the grating unit 10 includes an aspherical cylindrical lens 11, which includes a convex surface on the side away from the first substrate and a flat surface that adheres to the first substrate. The aspherical cylindrical lens 11 is made of a photocurable and / or thermocurable resin material, such as acrylic resin or polyurethane. Optionally, in a cross-section perpendicular to the length direction of the aspherical cylindrical lens 11, the radius of curvature of the surface of the aspherical cylindrical lens gradually decreases from the direction near the first substrate 100 to the direction away from the first substrate 100. That is, the radius of curvature on the convex side of the aspherical cylindrical lens 11 gradually decreases from the direction near the plane to the direction away from the plane. In this way, the light passing through both sides of the lens is more likely to converge with the light passing through the middle of the lens at the same focal point, thereby effectively reducing spherical aberration and improving the 3D display effect.

[0055] like Figure 3 as well as Figure 4 As shown, Figure 3 The diagram shown is the optical path diagram (left) of the spherical cylindrical lens 15, as well as the beam splitting curves and crosstalk curves for the left and right eyes (right). Figure 4The diagram shows the optical path of the aspherical cylindrical lens 11 (left), as well as the left and right eye beam splitting curves and crosstalk curves (right). Line A in both optical path diagrams represents the focal plane. A comparison of the two diagrams clearly shows that the light rays passing through the spherical cylindrical lens 15 are more divergent. The actual focal plane of the spherical cylindrical lens 15 has many divergent rays, meaning that the rays do not converge at the same focal point. In particular, the rays at the edges of the spherical cylindrical lens 15 are very divergent, which severely affects the beam splitting effect for the left and right eyes of the 3D display panel, increasing crosstalk. In contrast, all the rays from the aspherical cylindrical lens 11 converge at the focal plane, exhibiting good light-gathering ability, effectively reducing crosstalk, and thus improving the beam splitting effect for the left and right eyes of the 3D display panel. In the two 3D crosstalk simulation diagrams, the horizontal axis represents the deviation angle from the optical axis, the vertical axis of the upper graph represents light intensity, and the two curves represent the left and right eye beam splitting curves, respectively. The vertical axis of the lower graph represents the degree of crosstalk. As shown in the two 3D crosstalk simulation diagrams, the beam splitting curves and crosstalk curves simulated using the spherical cylindrical lens 15 show that right-eye light rays mix in the left-eye visual area, and left-eye light rays mix in the right-eye visual area. This results in a non-zero 3D crosstalk simulation, deteriorating the 3D display effect and reducing the user experience. However, the beam splitting curves and crosstalk curves simulated using the aspherical cylindrical lens 11 show less crosstalk from the left eye to the right eye visual area, and less crosstalk from the right eye to the left eye visual area, with a simulation result of zero crosstalk, indicating a better 3D display effect.

[0056] like Figure 1 As shown, in an optional embodiment, the display panel further includes a second substrate 300, located on the side of the grating 200 away from the first substrate 100. Liquid crystal is filled between the second substrate 300 and the aspherical cylindrical lens 11 to form a liquid crystal layer 12. A sealing element 16 is provided at the edge of the display panel to prevent liquid crystal leakage. The refractive index ne of the liquid crystal in the liquid crystal layer 12 along the optical axis is equal to the refractive index nr of the material of the aspherical cylindrical lens. The refractive index no of the liquid crystal in the liquid crystal layer 12 perpendicular to the optical axis. Electrode layers 500 are provided on both the side of the first substrate 100 near the second substrate 300 and the side of the second substrate 300 near the first substrate 100. Please refer to [the relevant documentation / reference]. Figure 5 When a first voltage is applied between the two electrode layers 500, the liquid crystal molecules align along the direction of the first substrate 100. At this time, the incident light from the light-emitting unit 410 passes through along the ne optical axis of the liquid crystal molecules, Δn = nr - ne = 0. The light does not refract after passing through the grating 200, and the grating 200 as a whole exhibits a glass-like light-transmitting effect; that is, the light still travels along the direction of the incident light, without a focusing effect, and the display panel does not produce a 3D display effect. Please refer to [the relevant documentation / reference]. Figure 6When a second voltage is applied between the two electrode layers 500, the liquid crystal molecules align in a direction perpendicular to the first substrate 100. At this time, incident light from the light-emitting unit 410 passes through along the no optical axis of the liquid crystal molecules, Δn = nr - no. The light is then refracted by the grating 200, and the grating 200 as a whole forms a lens with focusing and beam-splitting effects. This means that the light from different images is focused and projected onto the user's left and right eyeballs respectively, and the display panel produces a 3D display effect. Thus, the display panel has a switchable 3D display function. Optionally, the display panel also includes a support member 13, which is disposed between the aspherical cylindrical lens 11 and the second substrate 300. The support member 13 can be a plastic sphere with a certain degree of elasticity. The support member 13 can prevent deformation of the aspherical cylindrical lens 11 and ensure that there is always a certain amount of liquid crystal between the position of the aspherical cylindrical lens 11 closest to the second substrate 300 and the second substrate 300.

[0057] like Figure 2 As shown, in an optional embodiment, the display panel further includes a second substrate 300, located on the side of the grating 200 away from the first substrate 100. Liquid crystal is filled between the second substrate 300 and the first substrate 100, and the aspherical cylindrical lens 11 is composed of liquid crystal. Electrode layers 500 are provided on both the side of the first substrate 100 near the second substrate 300 and the side of the second substrate 300 near the first substrate 100. Specifically, a first filling structure layer 19 is also provided on the side of the second substrate 300 near the first substrate 100. The first filling structure layer 19 has a recessed structure on the side facing the first substrate 100, and the recessed surface is aspherical, creating an aspherical cylindrical lens-shaped gap between the first filling structure layer 19 and the first substrate 100. The gap is filled with liquid crystal to form the aspherical cylindrical lens 11 composed of liquid crystal. A sealing member 16 is provided at the edge of the display panel to prevent liquid crystal leakage. When electrode layers 500 are provided on both the side of the first substrate 100 near the second substrate 300 and the side of the second substrate 300 near the first substrate 100, the first filling structure layer 19 and the aspherical cylindrical lens 11 formed by the liquid crystal are located between the two electrode layers 500.

[0058] The refractive index ne of the liquid crystal in the aspherical cylindrical lens 11 along the optical axis is equal to the refractive index nr of the material of the first filling structure layer 19. The refractive index no of the liquid crystal in the aspherical cylindrical lens 11 perpendicular to the optical axis. When there is a first voltage between the two electrode layers 500, the liquid crystal molecules are aligned along the direction of the first substrate 100. At this time, the incident light from the light-emitting unit 410 passes through along the ne optical axis of the liquid crystal molecules, Δn=nr-ne=0. At this time, the light does not refract after passing through the grating 200, and the grating 200 as a whole presents a light-transmitting effect similar to glass, that is, the light still travels along the direction of the incident light, there is no light-gathering effect, and the display panel does not produce a 3D display effect. When a second voltage is applied between the two electrode layers 500, the liquid crystal molecules align in a direction perpendicular to the first substrate 100. At this time, incident light from the light-emitting unit 410 passes through along the no optical axis of the liquid crystal molecules, Δn = nr - no. The light is then refracted by the grating 200, and the grating 200 as a whole forms a lens-like focusing and beam-splitting effect. This means that the light from different images is focused and projected onto the user's left and right eyeballs respectively, producing a 3D display effect on the display panel. Thus, the display panel has an on / off 3D display function.

[0059] like Figure 1 as well as Figure 2 As shown, in some optional embodiments, the focal length L2 of the aspherical cylindrical lens 11 is greater than or equal to the distance L1 between the light-emitting layer 400 and the plane of the aspherical cylindrical lens 11. Specifically, the focal length of the aspherical cylindrical lens 11 is L2, and the distance between the aspherical cylindrical lens 11 and the plane of the aspherical cylindrical lens 11 is L1. At this time, the defocusing rate parameter U is defined as (L2-L1) / L1*100%. When U=0%, that is, when L1 equals L2, the focal point of the aspherical cylindrical lens 11 is on the light-emitting unit 410. At this time, the light from the light-emitting unit 410 has a better beam splitting ability after passing through the aspherical cylindrical lens 11. However, the optimal viewing angle for left and right 3D viewing of the display panel with this structure is relatively small, and it is generally used in small and medium-sized naked-eye 3D products, that is, products for single-person viewing. When U>0%, that is, when L1 is less than L2, the focal point of the aspherical cylindrical lens 11 is below the light-emitting unit 410. At this time, the light from the light-emitting unit 410 is relatively biased after passing through the aspherical cylindrical lens 11, but it will increase the optimal viewing angle for left and right 3D viewing. It is generally used in medium and large-sized naked-eye 3D products, that is, products viewed by multiple people.

[0060] like Figure 1 , Figure 2 as well as Figure 7As shown, in an optional embodiment, on a cross section perpendicular to the length direction of the aspherical cylindrical lens 11, the radius of curvature of the edge of the aspherical cylindrical lens 11 away from the first substrate 100 satisfies R=D / 2+P^2 / (8*D), where R is the radius of curvature at a point on the edge of the aspherical cylindrical lens away from the first substrate, D is the minimum distance from the vertex of the aspherical cylindrical lens to the straight line parallel to the first substrate 100 at that point, and P is the overlap length between the straight line parallel to the first substrate 100 at that point and the aspherical cylindrical lens 11. Specifically, see... Figure 6 At the edge of the aspherical cylindrical lens 11 closest to the first substrate 100, the radius of curvature R1 = D1 / 2 + P1^2 / (8*D1). As the lens moves away from the first substrate 100 from this position, the radius of curvature gradually decreases, i.e., R1 > R2 > R3 > ... R11 > Rn. Thus, the aspherical cylindrical lens 11 can achieve good focusing and beam splitting effects.

[0061] like Figure 8 to Figure 10 As shown, in an optional embodiment, the grating unit 10 includes a stacked cylindrical convex lens 17 and a cylindrical concave lens 18, with the side of the cylindrical convex lens 17 adjacent to the cylindrical concave lens 18 and the side of the cylindrical concave lens 18 adjacent to the cylindrical convex lens 17 in contact with each other. The light emitted by the light-emitting unit 410 generates negative spherical aberration when passing through the cylindrical convex lens 17 and positive spherical aberration when passing through the cylindrical concave lens 18. The positive and negative spherical aberrations cancel each other out, thereby optimizing spherical aberration and improving the 3D display effect. Figure 9 as well as Figure 10 As shown, in an optional embodiment, the display panel further includes a second substrate 300, located on the side of the grating 200 away from the first substrate 100. Liquid crystal is filled between the second substrate 300 and the first substrate 100, and the concave lenticular lens 18 or convex lenticular lens 17 is made of liquid crystal. Electrode layers (not shown) are provided on both the side of the first substrate 100 near the second substrate 300 and the side of the second substrate 300 near the first substrate 100. Optionally, as... Figure 9 As shown, a first filling structure layer 19 is disposed on the side of the first substrate 100 near the second substrate 300, and the surface of the first filling structure layer 19 near the second substrate 300 has a third radius of curvature. A second filling structure layer 20 is disposed on the side of the second substrate 300 near the first substrate 100, and the surface of the second filling structure layer 20 near the first substrate 100 has a first radius of curvature. The side of the first filling structure layer 19 near the second substrate 300 is filled with a photocurable and / or thermocurable resin material to form a columnar concave lens 18. The surface of the columnar concave lens 18 near the second substrate 300 has a second radius of curvature, and liquid crystal is filled between the columnar concave lens 18 and the second filling structure layer 20 to form a columnar convex lens 17. Optionally, as... Figure 10As shown, a first filling structure layer 19 is disposed on the side of the first substrate 100 near the second substrate 300, and the surface of the first filling structure layer 19 near the second substrate 300 has a third radius of curvature. A second filling structure layer 20 is disposed on the side of the second substrate 300 near the first substrate 100, and the surface of the second filling structure layer 20 near the first substrate 100 has a first radius of curvature. The side of the filling structure layer 20 near the first substrate 100 is filled with a photocurable and / or thermocurable resin material to form a columnar convex lens 17. The surface of the columnar convex lens 17 near the first substrate 100 has a second radius of curvature, and liquid crystal is filled between the columnar convex lens 17 and the first filling structure layer 19 to form a columnar concave lens 18. Optionally, the first radius of curvature, the second radius of curvature, and the third radius of curvature are all unequal. Optionally, the refractive index of the first filling structure layer 19 is n1, the refractive index of the resin material forming the lens is n2, the refractive index of the second filling structure layer 20 is n3, the refractive index of the liquid crystal along the optical axis is ne, and the refractive index of the liquid crystal perpendicular to the optical axis is no. Wherein, n1...<n2,n2> ne, ne>n3, ne>no. Figure 9 and Figure 10 The operation and function of the display panel of the liquid crystal forming lens shown are largely the same as those in the above embodiments, so they will not be described in detail here. Optionally, the surface of the convex cylindrical lens 17 away from the concave cylindrical lens 18 can be a plane, and the surface of the concave cylindrical lens 18 away from the convex cylindrical lens 17 can also be a plane.

[0062] like Figure 11 As shown, in an optional embodiment, the grating unit 10 includes a spherical cylindrical lens 15 and an aperture stop 14. The spherical cylindrical lens 15 includes a paraxial region located in the middle and a faraxial region located at the edge. The paraxial region is attached to the first substrate 100, and the aperture stop 14 is disposed between the faraxial region and the first substrate 100. Figure 3 It is known that the light rays passing through the edge of the spherical cylindrical lens 15 are highly divergent, which severely affects the beam splitting effect for the left and right eyes of the 3D display panel, increasing crosstalk. The light rays at the edge of the spherical cylindrical lens 15 are the light rays passing through the far-axis region. Using the aperture stop 14 to block the light rays passing through the far-axis region can effectively reduce crosstalk and improve the 3D display effect.

[0063] This application also discloses a method for manufacturing an aspherical cylindrical lens, comprising:

[0064] The material of the aspherical cylindrical lens is determined, and the shrinkage rate of the material is confirmed.

[0065] The actual size of the aspherical cylindrical lens is designed based on the size of the light-emitting unit.

[0066] The design dimensions of the aspherical cylindrical lens are designed based on the actual dimensions and the shrinkage rate of the material.

[0067] Manufacture the mold according to the design dimensions.

[0068] The aspherical cylindrical lens is manufactured using the mold.

[0069] Because the material of aspherical lens structures is a UV-curable and / or thermosetting resin adhesive, its main components are acrylic resin or polyurethane and other polymer materials, containing UV photocuring initiators, liquid crystal alignment components, crosslinking agents, zirconium oxide, titanium oxide, etc., making it a liquid mixture. After UV curing and / or thermosetting, due to changes in material properties and the volatilization of some uncured components, the final lens morphology parameters differ from the mold parameters. Specifically, the actual produced lens will shrink compared to the design value. Because of this shrinkage rate, reverse compensation is required before designing new structural parameters; therefore, the shrinkage rate must be confirmed before designing the lens. Figure 12 As shown, the shrinkage rate of the material is confirmed by measuring the actual distance H1 from the curved edge along the straight edge of the aspherical cylindrical lens at intervals of 0.1 micrometers to 1 micrometer along the straight edge of the aspherical cylindrical lens in a direction perpendicular to the straight edge. The difference between the actual distance H1 and the designed distance H2 is confirmed, and the shrinkage rate S = (H1 - H2) / H1 * 100%. Specifically, starting from the edge of the aspherical cylindrical lens, multiple X's are taken, where X is the distance from the edge. The difference between adjacent X's is 0.01 micrometers to 5 micrometers, preferably 0.1 micrometers to 1 micrometer. The actual distance H1 from the curved edge at this position along the direction perpendicular to the straight edge is measured, and the difference between the actual distance H1 and the designed distance H2 is confirmed, and the shrinkage rate S = (H1 - H2) / H1 * 100%.

[0070] The actual dimensions of the aspherical cylindrical lens are designed based on the size of the light-emitting unit, including calculating the radius of curvature at each position using R=D / 2+P^2 / (8*D). Simulations are performed using optical software, taking into account the actual needs of different products, the structure and size of the light-emitting layer of the 2D display screen, the optimal viewing distance for 3D displays, etc., to design the topographic coordinates of the aspherical surface and generate the conic constant K.

[0071]

[0072] Where z is the height of the surface along the optical axis, r is the radial distance, and c is the vertex curvature (c=1 / R, R is the vertex curvature radius).

[0073] Manufacturing a mold according to the design dimensions may include:

[0074] Natural diamond material is ground and polished using a high-precision grinding machine to match the morphological coordinates of the diamond tool with the design dimensions. After completion, it is measured using testing equipment such as a laser microscope, with measurements taken at intervals of 1-20µm, preferably 2-5µm, according to the lens cross-section, to match the measured values ​​with the design values. At the same time, the measurement accuracy and manufacturing precision of the measuring equipment are used to evaluate whether the diamond tool meets the requirements. If there is a deviation, it is ground repeatedly to ensure that there are no problems. At this point, the structure of the diamond tool is a convex structure.

[0075] Use a diamond cutter and engraving machine to carve a copper roller mold or a flat mold, so that the shape and structure are copied onto the copper roller mold. After completion, use equipment such as a laser microscope to measure and ensure that it meets the requirements. At this time, the copper roller mold structure is a concave structure.

[0076] The above structure is formed on flexible substrates such as PET / TAC using copper roller molds and forming equipment. It is then cured and set using UV light. After completion, it is measured using equipment such as laser microscopes and tested to ensure it meets the requirements, thus producing a steel film. At this point, the steel film structure is a convex structure.

[0077] The above-mentioned steel film + molding equipment is used to form the above structure on flexible substrates such as PET / TAC. UV light is used for curing and shaping. After completion, equipment such as laser microscope is used for measurement. If it meets the requirements, a soft film is produced. At this time, the soft film structure is a concave structure.

[0078] The above-mentioned soft film + micro-nano imprinting equipment is used to form the above structure on a rigid substrate such as glass. UV light is used for curing and shaping. If necessary, high temperature baking is added to further complete the curing. After completion, the structure is measured with equipment such as laser microscope and meets the requirements to produce lens glass. At this time, the lens glass structure is a convex structure.

[0079] The liquid crystal resin lens device is fabricated using the aforementioned lens glass, liquid crystal material, glass substrate, and other materials.

[0080] Of course, the above steps are for producing liquid crystal resin lens devices including convex lenses. When producing other types of devices, steps can be selectively added or omitted. For example, when producing panels without liquid crystals, liquid crystals can be omitted, and when producing concave lenses, the order of the convex and concave steps can be reversed.

[0081] This application also discloses a display device, which includes the display panel described above.

[0082] In one embodiment, the display device further includes a housing, and the display panel is disposed within the housing.

[0083] The display device provided in this application embodiment can be any device with display function, such as a mobile phone, tablet computer, television, laptop computer, or vehicle-mounted equipment.

[0084] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: First substrate; A grating, comprising a plurality of grating units arranged in an array, the grating being located on one side of the first substrate; The light-emitting layer includes a plurality of light-emitting units arranged in an array. The light-emitting layer is located on the side of the grating away from the first substrate or on the side of the first substrate away from the grating. Some of the light-emitting units in the light-emitting layer are configured to provide a first image, and other light-emitting units are configured to provide a second image. The orthographic projection of one of the grating units on the first substrate at least covers the orthographic projection of one of the light-emitting units on the first substrate; the grating unit includes an aspherical cylindrical lens, the aspherical cylindrical lens including a convex surface away from the first substrate and a plane in contact with the first substrate; in a cross section perpendicular to the length direction of the aspherical cylindrical lens, the radius of curvature of the surface of the aspherical cylindrical lens gradually decreases from near the first substrate to away from the first substrate; in a cross section perpendicular to the length direction of the aspherical cylindrical lens, the radius of curvature of the edge of the aspherical cylindrical lens away from the first substrate satisfies R=D / 2+P^2 / (8*D), where R is the radius of curvature of a point on the edge of the aspherical cylindrical lens away from the first substrate, D is the minimum distance from the vertex of the aspherical cylindrical lens to the straight line parallel to the first substrate where the point is located, and P is the overlap length between the straight line parallel to the first substrate where the point is located and the aspherical cylindrical lens.

2. The display panel according to claim 1, characterized in that, The display panel further includes a second substrate, which is located on the side of the grating away from the first substrate; liquid crystal is filled between the second substrate and the aspherical cylindrical lens, and the refractive index of the liquid crystal along the optical axis is equal to the refractive index of the aspherical cylindrical lens; an electrode layer is provided on the side of the first substrate near the second substrate and on the side of the second substrate near the first substrate.

3. The display panel according to claim 2, characterized in that, The display panel also includes a support member disposed between the aspherical cylindrical lens and the second substrate.

4. The display panel according to claim 2, characterized in that, The aspherical cylindrical lens is made of photocurable and / or thermocurable resin.

5. The display panel according to claim 1, characterized in that, The display panel further includes a second substrate, which is located on the side of the grating away from the first substrate; a first filling structure layer is filled between the second substrate and the first substrate, and an aspherical cylindrical lens-shaped gap is formed between the first filling structure layer and the first substrate, the gap being filled with liquid crystal; an electrode layer is provided on the side of the first substrate near the second substrate and on the side of the second substrate near the first substrate.

6. The display panel according to claim 1, characterized in that, The focal length of the aspherical cylindrical lens is greater than or equal to the distance between the light-emitting layer and the plane of the aspherical cylindrical lens.

7. The display panel according to claim 1, characterized in that, The grating unit includes a columnar convex lens and a columnar concave lens stacked together, with the side of the columnar convex lens close to the columnar concave lens and the side of the columnar concave lens close to the columnar convex lens being attached together.

8. The display panel according to claim 7, characterized in that, The display panel further includes a second substrate, which is located on the side of the grating away from the first substrate; liquid crystal is filled between the second substrate and the first substrate, and the columnar convex lens or the columnar concave lens is made of the liquid crystal; an electrode layer is provided on the side of the first substrate near the second substrate and on the side of the second substrate near the first substrate.

9. The display panel according to claim 7, characterized in that, The side of the cylindrical convex lens away from the cylindrical concave lens has a first radius of curvature, the side of the cylindrical convex lens close to the cylindrical concave lens and the side of the cylindrical concave lens close to the cylindrical convex lens have a second radius of curvature, and the side of the cylindrical concave lens away from the cylindrical convex lens has a third radius of curvature; the first radius of curvature, the second radius of curvature and the third radius of curvature are all different.

10. A method for manufacturing an aspherical cylindrical lens, used to manufacture the aspherical cylindrical lens as described in any one of claims 1-4 and claim 6, characterized in that, include: Determine the material of the aspherical cylindrical lens and confirm the shrinkage rate of the material; The actual dimensions of the aspherical cylindrical lens are designed based on the dimensions of the light-emitting unit. The design dimensions of the aspherical cylindrical lens are designed based on the actual dimensions and the shrinkage rate of the material. Manufacture the mold according to the design dimensions; The aspherical cylindrical lens is manufactured using the mold.

11. The method for manufacturing an aspherical cylindrical lens according to claim 10, characterized in that, Confirming the shrinkage rate of the material includes: On a cross section perpendicular to the length direction of the aspherical cylindrical lens, the distance from the straight edge to the curved edge is measured every 0.1 to 1 micrometer along the straight edge of the aspherical cylindrical lens in a direction perpendicular to the straight edge.

12. A display device, characterized in that, The display device includes a display panel as described in any one of claims 1-9.

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