Curved lens and display device

Abstract

A curved lens and a display device. The curved lens comprises a plurality of sub-lenses arranged around the optical center of the curved lens and connected to each other; each of the plurality of sub-lenses comprises a first curved surface and a second curved surface opposite to each other; the plurality of first curved surfaces are connected to each other to form a light-emitting surface of the curved lens, and the plurality of second curved surfaces are connected to each other to form a light-entering surface of the curved lens, and the light-emitting surface is closer to the optical center of the curved lens than the light-entering surface; the light-entering surface is a convex curved surface as a whole, and the light-emitting surface is a concave curved surface as a whole; the plurality of first curved surfaces and the plurality of second curved surfaces are all free-form surfaces.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a curved lens and a display device. Background Art

[0002] With the development of display technology, virtual reality (VR) display devices and augmented reality (AR) display devices have been widely recognized by users and received extensive attention from the industry. Virtual reality devices have advantages such as immersion, interactivity, and imagination; augmented reality display devices can achieve the fusion of external real scenes and virtual scenes by superimposing the displayed virtual scene images on the external real scenes, and thus can enhance the user's cognitive ability of the real world. Summary of the invention

[0003] At least one embodiment of the present disclosure provides a curved lens, which includes a plurality of sub-lenses arranged around the optical center of the curved lens and connected to each other; each of the plurality of sub-lenses includes a first curved surface and a second curved surface opposite to each other; a plurality of the first curved surfaces are connected to each other to form a light-emitting surface of the curved lens, and a plurality of the second curved surfaces are connected to each other to form a light-entering surface of the curved lens, and compared with the light-entering surface, the light-emitting surface is closer to the optical center of the curved lens; the light-entering surface is a convex surface as a whole, and the light-emitting surface is a concave surface as a whole; and a plurality of the first curved surfaces and a plurality of the second curved surfaces are all free-form surfaces.

[0004] For example, in at least one example of the curved lens, the plurality of sub-lenses are identical to one another.

[0005] For example, in at least one example of the curved lens, the number of the plurality of sub-lenses is an odd number, and the number of the plurality of sub-lenses is three.

[0006] For example, in at least one example of the curved lens, an included angle between adjacent first curved surfaces is greater than 120 degrees.

[0007] For example, in at least one example of the curved lens, each of the multiple sub-lenses includes a plurality of sub-lenses arranged around the optical center and connected to each other; each of the sub-lenses includes a first sub-surface and a second sub-surface opposite to each other; the first sub-surface is a first free-form surface, and the second sub-surface is a second free-form surface; and a plurality of the first sub-surfaces are connected to each other to form the first curved surface, and a plurality of the second sub-surfaces are connected to each other to form the second curved surface.

[0008] For example, in at least one example of the curved lens, each of the plurality of sub-lenses includes two sub-sub-lenses, and the two sub-sub-lenses are symmetrically distributed relative to the first plane.

[0009] For example, in at least one example of the curved lens, the angle between two adjacent first sub-curved surfaces is greater than 140 degrees.

[0010] For example, in at least one example of the curved lens, the center thickness of each of the multiple sub-lenses is greater than 2.5 mm, the edge thickness of each of the multiple sub-lenses is greater than 1.2 mm, and the ratio of the center thickness to the edge thickness of each of the multiple sub-lenses is between 1.8-2.7.

[0011] For example, in at least one example of the curved lens, the surface shape z1(x, y) of each of the plurality of first sub-surfaces and the surface shape z2(x, y) of each of the plurality of second sub-surfaces satisfy the following expressions (1) and (2), respectively:

[0012]

[0013]

[0014] Among them, c1 is the curvature radius of each of the multiple first sub-surfaces; k1 is the quadratic surface constant of each of the multiple first sub-surfaces, Cmn1 is the mn-th order coefficient of each of the multiple first sub-surfaces; c2 is the curvature radius of each of the multiple second sub-surfaces; k2 is the quadratic surface constant of each of the multiple second sub-surfaces; Cmn2 is the mn-th order coefficient of each of the multiple second sub-surfaces; m+n is greater than or equal to 1 and less than or equal to p.

[0015] For example, in at least one example of the curved lens, when the value of m is an odd number, the values ​​of Cmn1 and Cmn2 are both zero; and when the value of m+n is an odd number, the sum of the mn-th order coefficients of the multiple first sub-surfaces is equal to zero, and the sum of the mn-th order coefficients of the multiple second sub-surfaces is equal to zero.

[0016] For example, in at least one example of the curved lens, the absolute value of c2 is greater than the absolute value of c1; and the ratio of the absolute value of c2 to the absolute value of c1 is between 3-7.

[0017] For example, in at least one example of the curved lens, the first curve obtained by cutting two adjacent first curved surfaces by the first plane includes a first M-shaped portion; the first M-shaped portion includes two first convex points, and the first curve is located on the same side of the line connecting the two first convex points; the second curve obtained by cutting two adjacent second curved surfaces by the first plane includes a ridge-shaped portion; the second curve obtained by cutting two adjacent first sub-surfaces by the second plane includes a second M-shaped portion; and the second M-shaped portion includes two second convex points, and the second curve is located on the same side of the line connecting the two second convex points.

[0018] For example, in at least one example of the curved lens, the curved lens is integrally injection-molded so that there is no interface between adjacent sub-lenses.

[0019] For example, in at least one example of the curved lens, pupils of the plurality of sub-lenses are located at different positions and are arranged around the optical center of the curved lens.

[0020] For example, in at least one example of the curved lens, the optical center of the curved lens is located on a side of the pupil of the plurality of sub-lenses that is away from the curved lens.

[0021] For example, in at least one example of the curved lens, the optical center of the curved lens is the intersection of the axes of the plurality of sub-lenses; and the axis of each of the plurality of sub-lenses is perpendicular to the plane where the pupil of the sub-lens is located.

[0022] At least one embodiment of the present disclosure provides another curved lens, which includes a plurality of sub-lenses arranged around the optical center of the curved lens and connected to each other; each of the plurality of sub-lenses includes a first curved surface and a second curved surface opposite to each other; a plurality of the first curved surfaces are connected to each other to form a light exit surface of the curved lens, and a plurality of the second curved surfaces are connected to each other to form a light incident surface of the curved lens, and compared with the light incident surface, the light exit surface is closer to the optical center of the curved lens; the light incident surface is a convex surface as a whole, and the light exit surface is a concave surface as a whole; and the pupils of the plurality of sub-lenses are located at different positions and are arranged around the optical center of the curved lens.

[0023] For example, in at least one example of the another curved lens, the optical center of the curved lens is located on a side of the pupil of the plurality of sub-lenses that is away from the curved lens.

[0024] For example, in at least one example of the other curved lens, the optical center of the curved lens is the intersection of the axes of the multiple sub-lenses; and the axis of each of the multiple sub-lenses is perpendicular to the plane where the pupil of the sub-lens is located.

[0025] For example, in at least one example of the other curved lens, the plurality of first curved surfaces and the plurality of second curved surfaces are all free-form surfaces.

[0026] For example, in at least one example of the another curved lens, the plurality of sub-lenses are identical to each other.

[0027] For example, in at least one example of the other curved lens, the number of the plurality of sub-lenses is an odd number, and the number of the plurality of sub-lenses is three.

[0028] For example, in at least one example of the other curved lens, an included angle between adjacent first curved surfaces is greater than 120 degrees.

[0029] For example, in at least one example of the other curved lens, each of the multiple sub-lenses includes a plurality of sub-lenses arranged around the optical center and connected to each other; each of the sub-lenses includes a first sub-surface and a second sub-surface opposite to each other; the first sub-surface is a first free-form surface, and the second sub-surface is a second free-form surface; and a plurality of the first sub-surfaces are connected to each other to form the first curved surface, and a plurality of the second sub-surfaces are connected to each other to form the second curved surface.

[0030] For example, in at least one example of the other curved lens, each of the plurality of sub-lenses includes two sub-sub-lenses, and the two sub-sub-lenses are symmetrically distributed relative to the first plane.

[0031] For example, in at least one example of the other curved lens, the angle between two adjacent first sub-curved surfaces is greater than 140 degrees.

[0032] For example, in at least one example of the other curved lens, the center thickness of each of the multiple sub-lenses is greater than 2.5 mm, the edge thickness of each of the multiple sub-lenses is greater than 1.2 mm, and the ratio of the center thickness to the edge thickness of each of the multiple sub-lenses is between 1.8-2.7.

[0033] For example, in at least one example of the other curved lens, the surface shape z1(x, y) of each of the plurality of first sub-surfaces and the surface shape z2(x, y) of each of the plurality of second sub-surfaces satisfy the following expressions (1) and (2), respectively:

[0034]

[0035]

[0036] Among them, c1 is the curvature radius of each of the multiple first sub-surfaces; k1 is the quadratic surface constant of each of the multiple first sub-surfaces, Cmn1 is the mn-th order coefficient of each of the multiple first sub-surfaces; c2 is the curvature radius of each of the multiple second sub-surfaces; k2 is the quadratic surface constant of each of the multiple second sub-surfaces; Cmn2 is the mn-th order coefficient of each of the multiple second sub-surfaces; m+n is greater than or equal to 1 and less than or equal to p.

[0037] For example, in at least one example of the other curved lens, when the value of m is an odd number, the values ​​of Cmn1 and Cmn2 are both zero; and when the value of m+n is an odd number, the sum of the mn-th order coefficients of the multiple first sub-surfaces is equal to zero, and the sum of the mn-th order coefficients of the multiple second sub-surfaces is equal to zero.

[0038] For example, in at least one example of the another curved lens, the absolute value of c2 is greater than the absolute value of c1; and the ratio of the absolute value of c2 to the absolute value of c1 is between 3-7.

[0039] For example, in at least one example of the other curved lens, the first curve obtained by cutting two adjacent first curved surfaces by the first plane includes a first M-shaped portion; the first M-shaped portion includes two first convex points, and the first curve is located on the same side of the line connecting the two first convex points; the second curve obtained by cutting two adjacent second curved surfaces by the first plane includes a ridge-shaped portion; the second curve obtained by cutting two adjacent first sub-surfaces by the second plane includes a second M-shaped portion; and the second M-shaped portion includes two second convex points, and the second curve is located on the same side of the line connecting the two second convex points.

[0040] At least one embodiment of the present disclosure further provides a display device, which includes the curved lens provided by any embodiment of the present disclosure.

[0041] For example, in at least one example of the display device, the display device also includes a plurality of display channels, wherein the plurality of sub-lenses of the curved lens correspond one-to-one to the plurality of display channels; and each of the plurality of sub-lenses is arranged in the corresponding display channel.

[0042] For example, in at least one example of the display device, the imaging surfaces of the multiple display channels are located on the same curved surface or on the same plane.

[0043] For example, in at least one example of the display device, when the imaging planes of the multiple display channels are located on the same plane, the imaging planes of the multiple display channels are all perpendicular to the global axis of the curved lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure.

[0045] Figure 1A is a schematic diagram of the structure of a display device;

[0046] Figure 1B yes Figure 1A Another structural schematic diagram of the display device shown.

[0047] Figure 2 is a cross-sectional schematic diagram of a curved lens and a display device provided by at least one embodiment of the present disclosure;

[0048] Figure 3A yes Figure 2 Another schematic diagram of the curved lens shown;

[0049] Figure 3B yes Figure 2 Another schematic diagram of the curved lens shown;

[0050] Figure 4A is a schematic cross-sectional view of a curved lens;

[0051] Figure 4B yes Figure 4A Another schematic cross-sectional view of the curved lens shown;

[0052] Figure 5 is a schematic diagram of another curved lens provided by at least one embodiment of the present disclosure;

[0053] Fig. 6A Yes Figure 5 A cross-sectional schematic diagram of a display device with a curved lens shown;

[0054] Figure 6B Yes Figure 5 Another schematic cross-sectional view of the display device with the curved lens shown;

[0055] Fig. 7A is a schematic diagram of yet another curved lens provided by at least one embodiment of the present disclosure;

[0056] Figure 7B yes Fig. 7A The cross-sectional view of the curved lens shown is obtained after being cut by a first plane;

[0057] Figure 7C yes Fig. 7A The cross-sectional view of the curved lens shown is obtained after being cut by a second plane;

[0058] Fig. 8A yes Fig. 7A Orthographic projection of the curved lens shown on the XOY plane;

[0059] Figure 8B yes Fig. 7A Orthographic projection of the curved lens shown on the YOZ plane;

[0060] Figure 8C yes Fig. 7A Orthographic projection of the curved lens shown on the XOZ plane;

[0061] Fig.9A Yes Fig. 7A A cross-sectional view obtained after the display device of the curved lens shown is cut by a first plane;

[0062] Fig. 9B Yes Fig. 7A Another cross-sectional view obtained after the display device of the curved lens shown is cut by the first plane;

[0063] Fig. 10A Yes Fig. 7A A cross-sectional view obtained after the display device of the curved lens shown is cut by a second plane;

[0064] Fig. 10B Yes Fig. 7A Another cross-sectional view obtained after the display device of the curved lens shown is cut by a second plane;

[0065] Fig. 10C Yes Fig. 7A Another cross-sectional view of the curved lens display device shown in FIG. 1 obtained by cutting the display device by a second plane; and

[0066] Fig. 10D Yes Fig. 7A The light path simulation results of the display device with curved lens are shown. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0068] Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0069] The inventors of the present disclosure have noticed in their research that the resolution of a display device can be improved by splicing multiple display channels. However, the display effect of the display device obtained by splicing multiple display channels is poor. Figure 1A Give an example explanation.

[0070] Figure 1A is a cross-sectional schematic diagram of a display device 500, Figure 1B yes Figure 1A Another schematic cross-sectional view of a display device 500 is shown. Figure 1A and Figure 1B The display device 500 shown may be implemented as a near-eye display device or a head-mounted display device. Figure 1A and Figure 1B The display device 500 shown can be implemented as a virtual reality display device or an augmented reality display device. Figure 1A and Figure 1B The illustrated display device 500 may correspond to a single lens of virtual display glasses.

[0071] like Figure 1A and Figure 1B As shown, the display device 500 includes multiple display channels, multiple display screens and multiple stacked stitching lenses; the multiple display screens are respectively arranged in the multiple display channels; the multiple display screens respectively display multiple initial sub-images; the multiple stacked stitching lenses image the multiple initial sub-images to form multiple display sub-images connected to each other, and the multiple display sub-images connected to each other form an image displayed by the display device; the pupils of the above-mentioned multiple display channels are all located at the pupil of the display device 500.

[0072] For example, Figure 1A and Figure 1BAs shown, the above-mentioned multiple display channels can be a first display channel 501, a second display channel 502 and a third display channel 503, and the above-mentioned multiple display screens can be a first display screen 521, a second display screen 522 and a third display screen 523; the above-mentioned multiple stitching lenses include a first stitching lens 530, a second stitching lens 540 and a third stitching lens 550 respectively located in the first display channel 501, the second display channel 502 and the third display channel 503; the first display screen 521, the second display screen 522 and the third display screen 523 are respectively located in the first display channel 501, the second display channel 502 and the third display channel 503, and are respectively configured to display a first initial sub-image, a second initial sub-image and a third initial sub-image; the multiple stacked stitching lenses image the first initial sub-image, the second initial sub-image and the third initial sub-image, and form a first display sub-image 561, a second display sub-image 562 and a third display sub-image imaging 563 connected to each other.

[0073] like Figure 1A and Figure 1B As shown, the first display channel 501, the second display channel 502 and the third display channel 503 respectively have a first optical axis 511, a second optical axis 512 and a third optical axis 513. For example, the spliced ​​lens is formed by splicing a plurality of (e.g., three) sub-lenses having rotational symmetry characteristics (e.g., relative to the optical axes of the corresponding display channels). For example, the optical axes of the plurality of sub-lenses respectively coincide with the optical axes of the plurality of display channels.

[0074] For example, the first spliced ​​lens 530 can be obtained by the following method: First, three lenses with rotational symmetry are cut to obtain three cut sub-lenses; then, the three cut sub-lenses correspond to the three display channels of the display device respectively; and then the three cut sub-lenses are spliced ​​and bonded to each other to obtain the first spliced ​​lens 530.

[0075] For example, Figure 1A and Figure 1B The first direction D1 shown may be toward the front of the user wearing the display device 500. Figure 1A and Figure 1B The second direction D2 shown may be a vertical direction (e.g., a gravity direction). For example, when the user's eyeball (eyeball pupil) is located at the pupil 504 of the display device 500, the user can view multiple display sub-images displayed by the display device 500. However, the inventors of the present disclosure note that Figure 1A and Figure 1B The first splicing lens 530 and the display device 500 shown may have at least one of the following three problems.

[0076] First, as Figure 1BAs shown, the deflection angle between the optical axes of adjacent sub-lenses (for example, the angle θ51 between the optical axis of the sub-lens located in the first display channel 501 and the optical axis of the sub-lens located in the second display channel 502) is large, which makes it difficult for the adjacent sub-lenses to transition smoothly, and makes the overall thickness H51 of the spliced ​​lens thicker. In this case, it is difficult to form the above-mentioned spliced ​​lens through an integrated manufacturing process (for example, integrated injection molding), and it is necessary to form the above-mentioned spliced ​​lens by cutting and then splicing; however, the spliced ​​lens obtained by cutting and then splicing has a splicing seam, which reduces the display effect of the display device 500 and the user experience.

[0077] Second, if Figure 1A and Figure 1B As shown, the pupils of the above-mentioned multiple display channels are all located at the same position (for example, located at the pupil of the display device 500). Therefore, when the user wearing the display device 500 looks straight ahead, the light output by the display device 500 (the light used to form the display image) can be received relatively well. However, when the eyeball of the user wearing the display device 500 moves (for example, moves upward or downward), the pupil of the user deviates from the pupil of the display device 500. In this case, the intensity of the light output by the display device 500 received by the pupil is reduced, thereby reducing the display effect of the display device 500 and the user's experience.

[0078] Third, if Figure 1A and Figure 1B As shown, multiple display sub-images are located in different planes, and the planes where adjacent display sub-images are located intersect with each other, which may make the user aware that the adjacent display sub-images are not from the same display screen, thereby further reducing the display effect of the display device 500 and the user's experience.

[0079] At least one embodiment of the present disclosure provides a curved lens and a display device. The curved lens includes a plurality of sub-lenses arranged around the optical center of the curved lens and connected to each other; each of the plurality of sub-lenses includes a first curved surface and a second curved surface opposite to each other; a plurality of the first curved surfaces are connected to each other to form a light-emitting surface of the curved lens, and a plurality of the second curved surfaces are connected to each other to form a light-entering surface of the curved lens, and compared with the light-entering surface, the light-emitting surface is closer to the optical center of the curved lens; the light-entering surface is a convex curved surface as a whole, and the light-emitting surface is a concave curved surface as a whole.

[0080] In some examples, the pupil is the image of the aperture stop of the optical system (e.g., a sub-lens) in the image space of the optical system. For example, the aperture stop of the optical system (e.g., a sub-lens) is located at the same position as the pupil of the optical system. In at least one embodiment of the present disclosure, the pupil refers to the exit pupil of the optical system (the final product); when performing simulation using optical software based on back tracing, the exit pupil is designated as the entrance pupil.

[0081] In some examples, the curved lens can be used in a near-eye display device or a head-mounted display device. For example, the curved lens can be used in a virtual reality display device or an augmented reality display device, for example, the curved lens can be used as a partial element of a single eyeglass lens of virtual display glasses.

[0082] In some examples, the curved lens can reduce the included angle (or deflection angle) between adjacent sub-lenses, thereby reducing the overall thickness of the curved lens and allowing the curved lens to be formed through an integrated manufacturing process (eg, integrated injection molding).

[0083] In some examples, pupils of the plurality of sub-lenses are located at different positions, thereby reducing the angle between adjacent sub-lenses and improving the display effect of a display device including the curved lens.

[0084] In some examples, the first curved surfaces and the second curved surfaces may all be free-form surfaces, thereby reducing the angle between adjacent sub-lenses.

[0085] In some examples, the imaging surfaces of multiple sub-lenses (including multiple display channels of multiple sub-lenses) are located on the same curved surface or on the same plane. In this case, the transition between the joints of the multiple display sub-images is smooth, thereby improving the display effect of the display device including the curved lens.

[0086] The following non-limiting description of the curved lens and display device provided according to at least one embodiment of the present disclosure is given by several examples. As described below, different features in these embodiments or specific examples can be combined with each other without conflicting with each other to obtain new embodiments or examples, and these new embodiments or examples also fall within the scope of protection of the present disclosure.

[0087] Figure 2 is a cross-sectional schematic diagram of a curved lens 130 and a display device 100 provided by at least one embodiment of the present disclosure; for ease of description, Figure 2 and other drawings (e.g., Figure 3A , Figure 3B , Figure 4A and Figure 4B ) also shows the eyeballs of the user wearing the display device 100 (for example, Figure 2Eyeball 181 and Fig.9A The eyeball in 381). Figure 2 The first direction D1 shown may be toward the front of the user wearing the display device 100. Figure 2 The second direction D2 shown may be a vertical direction (eg, a gravity direction).

[0088] like Figure 2 As shown, the display device 100 includes multiple display channels (for example, a first display channel 101, a second display channel 102, and a third display channel 103), multiple display screens (for example, a first display screen 121, a second display screen 122, and a third display screen 123), a curved lens 130, and a lens group 150 stacked with the curved lens 130.

[0089] For example, Figure 2 As shown, the curved lens 130 may be the optical element of the display device 100 that is closest to the light-emitting side of the display device 100 (that is, the last optical element); in this case, the design difficulty of the curved lens 130 is usually greater than the design difficulty of other optical elements of the display device 100. It should be noted that, for the sake of clarity, Figure 2 The lens group 150 stacked with the curved lens 130 is schematically shown using a biconvex lens, but the structure of the lens group 150 is not limited to Figure 2 Example shown.

[0090] like Figure 2 As shown, multiple display screens are respectively arranged in multiple display channels, and the multiple display screens respectively display multiple initial sub-images (for example, a first initial sub-image, a second initial sub-image, and a third initial sub-image), and the curved lens 130 and the lens group 150 stacked with the curved lens 130 image the multiple initial sub-images to form multiple display sub-images connected to each other (for example, a first display sub-image 161, a second display sub-image 162, and a third display sub-image 163).

[0091] like Figure 2 As shown, the curved lens 130 includes a plurality of sub-lenses 131 arranged around an optical center 182 of the curved lens 130 and connected to each other. For example, the plurality of sub-lenses 131 of the curved lens 130 correspond to the plurality of display channels one by one; each of the plurality of sub-lenses 131 is arranged in a corresponding display channel. For example, the optical center 182 of the curved lens 130 refers to the intersection of the axes 111 of the plurality of sub-lenses 131 (the axes of the display channels where the plurality of sub-lenses 131 are located).

[0092] like Figure 2As shown, each of the plurality of sub-lenses 131 includes a first curved surface 141 and a second curved surface 142 that are opposite to each other, that is, the first curved surface 141 and the second curved surface 142 that are opposite to each other in the direction of adjusting the optical path. The plurality of first curved surfaces 141 are connected to each other to form a light emitting surface of the curved lens 130, and the plurality of second curved surfaces 142 are connected to each other to form a light incident surface of the curved lens 130. Compared with the light incident surface, the light emitting surface is closer to the optical center 182 of the curved lens 130.

[0093] like Figure 2 As shown, the pupils 171 of the multiple sub-lenses 131 are located at different positions and are arranged around the optical center 182 of the curved lens 130 ; the optical center 182 of the curved lens 130 is located on the side of the pupils 171 of the multiple sub-lenses 131 away from the curved lens 130 .

[0094] For example, when a user wears the display device 100, the pupils 171 of the multiple sub-lenses 131 can be arranged around the user's eyeballs, so that the user's pupils can better receive the light output by the display device 100 for forming the display sub-image. For example, the pupils 171 of the multiple sub-lenses 131 can be located at different positions on the surface of the user's eyeball. For example, the center of the user's eyeball can be located at the optical center 182 of the curved lens 130, approximately at the optical center 182 of the curved lens 130, as long as the user can obtain an acceptable visual effect. For example, when the user's eyeball turns upward to observe the second display sub-image 162, the user's pupil can better receive the light used to form the second display sub-image 162, thereby improving the display effect of the display device 100.

[0095] For example, the axis 111 of each of the multiple sub-lenses 131 is perpendicular to the plane where the pupil 171 of the sub-lens 131 is located, so that the user's pupil can better receive the light used to form a display sub-image, thereby further improving the display effect of the display device 100.

[0096] In some examples, by making the pupils 171 of the plurality of sub-lenses 131 located at different positions and arranged around the optical center 182 of the curved lens 130, the angle (or deflection angle) between adjacent sub-lenses 131 can be reduced, thereby reducing the overall thickness of the curved lens 130, and making it possible to form the curved lens 130 through an integrated manufacturing process (e.g., integrated injection molding), and the material for forming the curved lens 130 can be appropriately selected, for example, PMMA (polymethyl methacrylate), which is not limited in the embodiments of the present disclosure. Figure 3A , Figure 3B , Figure 4A and Figure 4B An exemplary description is given.

[0097] Figure 3A Shows Figure 2 Another schematic diagram of the curved lens 130 is shown, Figure 3B Shows Figure 2 Another schematic diagram of the curved lens 130 is shown; for comparison, Figure 4A A schematic diagram of a curved lens 630 with a single pupil 671 is shown, Figure 4B Another schematic diagram of a single pupil curved lens 630 is shown.

[0098] like Figure 3A and Figure 4A As shown, the deflection angle θ11 of the multi-pupil curved lens 130 is smaller than the deflection angle θ61 of the single-pupil curved lens 630; the included angle θ12 between adjacent sub-lenses 131 of the multi-pupil curved lens 130 is smaller than the included angle θ62 between adjacent sub-lenses 631 of the single-pupil curved lens 630; and the overall thickness H11 of the multi-pupil curved lens 130 is smaller than the overall thickness H61 of the single-pupil curved lens 630.

[0099] It should be noted that the multi-pupil curved lens 130 means that the pupils 171 of the multiple sub-lenses 131 of the curved lens 130 are located at different positions; the single-pupil curved lens 630 means that the pupils 671 of the multiple sub-lenses 631 of the curved lens 630 are all located at the same position (for example, the position where the pupil 671 of the display device including the curved lens 630 is located).

[0100] like Figure 3A As shown, the deflection angle of the curved lens 130 refers to the angle between the axes 111 of the adjacent sub-lenses 131 of the curved lens 130. Figure 3A and Figure 4A As shown, the included angle between adjacent sub-lenses 131 refers to the included angle between the first curved surfaces 141 of adjacent sub-lenses 131, and the included angle between the first curved surfaces 141 of adjacent sub-lenses 131 refers to the angle between the first curved surfaces 141 of adjacent sub-lenses 131 using the first plane (that is, as shown in FIG. Figure 3A The angle between the first curves obtained by cutting the first curved surface 141 of the adjacent sub-lenses 131 on the paper surface shown in FIG. 1 is the angle between the tangent lines (for example, tangent line 191 and tangent line 192) of the first curves of the adjacent sub-lenses 131 passing through the intersection point 190 of the first curves of the adjacent sub-lenses 131. Figure 3A As shown, the overall thickness H11 of the curved lens 130 is the thickness of the curved lens 130 at the global axis of the curved lens 130 (eg, Figure 3A The length of the orthographic projection on the axis 111 of the sub-lens 131 of the first display channel 101 is shown. It should be noted that, Figure 4AThe deflection angle and overall thickness of the curved lens 630 shown have similar definitions and are not described in detail.

[0101] like Figure 3B As shown, for the multi-pupil curved lens 130, the first curves of the adjacent sub-lenses 131 include a first M-shaped portion, the first M-shaped portion includes two convex points (convex point 194 and convex point 195), and the first M-shaped portion (the first curves of the adjacent sub-lenses 131) are all located on the same side of the line 193 connecting the two convex points, and thus are roughly in an M shape, however, the embodiments of the present disclosure are not limited to the situation shown in the figure. Figure 4B As shown, for the single pupil curved lens 630 , the first curves of adjacent sub-lenses 131 are all located on the same side of a line 693 connecting edge points of the first curves of adjacent sub-lenses 631 .

[0102] like Figure 3B and Figure 4B As shown, the thickness H13 of the gap between adjacent sub-lenses 131 of the multi-pupil curved lens 130 is smaller than the thickness H63 of the gap between adjacent sub-lenses 131 of the single-pupil curved lens 630, thereby reducing the difficulty of forming the curved lens in an integrated manner. Figure 3B As shown, the thickness H13 of the gap between adjacent sub-lenses 131 of the multi-pupil curved lens 130 is the distance between the intersection point 190 of the first curve of the adjacent sub-lenses 131 and the line 193 connecting the two convex points. Figure 4B As shown, the thickness H61 of the gap between adjacent sub-lenses 631 of the single pupil curved lens 630 is the distance between the intersection point 690 of the first curves of adjacent sub-lenses 631 and the line 693 between the edge points of the first curves of adjacent sub-lenses 631 .

[0103] Figure 5 is a schematic diagram of another curved lens provided by at least one embodiment of the present disclosure, Figure 5 The curved lens 230 shown is Figure 3A and Figure 3B For the sake of clarity, only the differences between the two will be described here, and the similarities will not be repeated. Figure 5 As shown, Figure 5 The plurality of sub-lenses 231 shown do not have Figure 3A and Figure 3B The edge regions of the multiple sub-lenses 131 of the curved lens 130 shown in FIG. 1 ; in this case, Figure 5 The deflection angle θ21 of the curved lens 230 is less than Figure 3A and Figure 3B The deflection angle θ11 of the curved lens shown; Figure 5 The overall thickness H21 of the curved lens 230 is less than Figure 3Aand Figure 3B The overall thickness H11 of the curved lens 130 is shown; Figure 5 The thickness H23 of the gap between adjacent sub-lenses 231 of the curved lens 230 shown is less than Figure 3A and Figure 3B The thickness H13 of the gap between adjacent sub-lenses 131 of the curved lens 130 shown, that is, Figure 5 The curved lens 230 shown can further reduce the deflection angle, the overall thickness of the curved lens, and the thickness of the gap between adjacent sub-lenses of the curved lens, thereby further reducing the difficulty of processing the curved lens.

[0104] like Figure 5 As shown, the absolute value of the radius of curvature of the second curved surface 242 is greater than the absolute value of the radius of curvature of the first curved surface 241. For example, the ratio of the absolute value of the radius of curvature of the second curved surface 242 to the absolute value of the radius of curvature of the first curved surface 241 is between 3 and 7. Figure 3A and Figure 3B The absolute value of the radius of curvature of the second curved surface 142 shown may also be greater than the absolute value of the radius of curvature of the first curved surface 141 , which will not be described in detail herein.

[0105] In one example, if Figure 3A , Figure 3B and Figure 5 As shown, the first curved surface 141 (or 241) and the second curved surface 142 (or 242) can be curved surfaces with rotational symmetry characteristics (relative to the axis of the sub-lens), that is, the first curved surface 141 (or 241) and the second curved surface 142 (or 242) can be non-free curved surfaces. In this case, the axes 111 (or 211) of the multiple sub-lenses refer to the optical axes of the multiple sub-lenses. For example, the first curved surface 141 (or 241) and the second curved surface 142 (or 242) can respectively adopt aspherical surfaces, spherical surfaces or other applicable curved surface shapes.

[0106] In another example, the first curved surface and the second curved surface may be curved surfaces that do not have rotational symmetry characteristics (relative to the axis of the sub-lens), that is, the first curved surface and the second curved surface may be free-form surfaces. For example, for clarity, examples in which the first curved surface and the second curved surface may be free-form surfaces will be described in Fig. 7A The example shown is described in detail and will not be repeated here.

[0107] In some examples, a surface having a rotational symmetric property means that the complete surface including the surface (for example, the complete surface before being cut) has a rotational symmetric property, and it is not required that the surface located in the curved lens (for example, the partial surface after the surface is cut) has a rotational symmetric property in a strict sense; a surface not having a rotational symmetric property means that the complete surface including the surface does not have a rotational symmetric property.

[0108] For example, Figure 3A , Figure 3B and Figure 5 The curved lens 130 (or 230 ) shown can be formed in one piece (eg, by integral injection molding) so that there is no interface between adjacent sub-lenses 131 and 231 , that is, there is a continuous transition between the constituent materials of the sub-lenses 131 and 231 .

[0109] For example, Figure 3A , Figure 3B and Figure 5 The multiple sub-lenses 131 and 231 of the curved lens 130 (or 230) are identical to each other, so as to reduce the manufacturing cost of other optical elements of the display device including the curved lens 130 (or 230).

[0110] For example, Figure 3A , Figure 3B and Figure 5 The number of the plurality of sub-lenses 131 and 231 of the curved lens 130 (or 230) is an odd number. Figure 3A , Figure 3B and Figure 5 The curved lens shown may include multiple identical sub-lenses even when the number of the multiple sub-lenses is not an even number, thereby improving the design freedom of the curved lens and the display device including the curved lens. For example, the number of the multiple sub-lenses is three, so as to better balance the resolution and manufacturing difficulty of the display device including the curved lens.

[0111] For example, Figure 3A , Figure 3B and Figure 5 The included angles of adjacent first curved surfaces 241 (or 141) of the curved lens shown are all greater than 120 degrees (for example, 140 degrees, 150 degrees or 160 degrees) to reduce the thickness of the gaps between adjacent sub-lenses 231 (or 131) and the overall thickness of the curved lens, so that the curved lens 230 (or 130) can be formed in an integrated manner (for example, integrated injection molding).

[0112] like Figure 2 , Figure 3A , Figure 3B and Figure 5As shown in FIG, the light incident surface is a convex surface as a whole, and the light exit surface is a concave surface as a whole. The meaning of being a convex surface or a concave surface as a whole will be described in Fig. 7A The examples shown are used to illustrate the above and will not be described in detail here.

[0113] For example, in Figure 3A , Figure 3B and Figure 5 The curved lens 230 (or 130) is applied to Figure 2 In the case of the display device 100 shown in FIG. Figure 2 The multiple display sub-images 161-163 of the display device 100 shown are not limited to intersecting each other, and the multiple display sub-images 161-163 may also be located on the same curved surface or the same plane, thereby making it difficult for the user to notice that the multiple display sub-images 161-163 come from different display screens.

[0114] In one example, if Fig. 6A As shown, multiple display sub-images 261 are located on the same curved surface, that is, the imaging surfaces of multiple display channels are located on the same curved surface. In this case, each display sub-image 261 is a curved surface image. For example, when designing a curved surface lens (for example, using optical design software ZEMAX to design a curved surface lens), the curved surface lens can be optimized by making the imaging surfaces of multiple display channels all curved surfaces, and the curvature radii of the imaging surfaces of the multiple display channels are the same, so that the multiple display sub-images 261 are located on the same curved surface.

[0115] In another example, Figure 6B As shown, multiple display sub-images 261 are located on the same plane, that is, the imaging surfaces of multiple display channels are located on the same plane. In this case, each display sub-image 261 is a plane image. For example, when designing a curved lens, the curved lens can be optimized by making the imaging surfaces of multiple display channels all planes and perpendicular to the global axis of the curved lens, so that the multiple display sub-images 261 are located on the same plane.

[0116] At least one embodiment of the present disclosure provides another curved lens, which includes a plurality of sub-lenses arranged around the optical center of the curved lens and connected to each other; each of the plurality of sub-lenses includes a first curved surface and a second curved surface opposite to each other; a plurality of the first curved surfaces are connected to each other to form a light exit surface of the curved lens, and a plurality of the second curved surfaces are connected to each other to form a light incident surface of the curved lens, and compared with the light incident surface, the light exit surface is closer to the optical center of the curved lens; the light incident surface is a convex surface as a whole, and the light exit surface is a concave surface as a whole; and the pupils of the plurality of sub-lenses are located at different positions and are arranged around the optical center of the curved lens.

[0117] Fig. 7A is a schematic diagram of yet another curved lens 330 provided by at least one embodiment of the present disclosure. Figure 7B yes Fig. 7A The curved lens 330 shown is formed by a first plane (ie, Fig. 7A The cross-sectional view obtained after cutting on the YOZ plane; Figure 7C yes Fig. 7A The curved lens 330 shown is surrounded by a second plane (ie, Fig. 7A Cross-sectional view obtained after cutting in the XOZ plane. Fig. 8A yes Fig. 7A The orthographic projection of the curved lens 330 shown on the XOY plane; Figure 8B yes Fig. 7A The orthographic projection of the curved lens 330 shown on the YOZ plane; Figure 8C yes Fig. 7A The orthographic projection of the curved lens 330 shown in FIG. 3 is shown in FIG. 3 on the XOZ plane. It should be noted that for the sake of clarity, Fig. 7A The mounting portion 399 of the curved lens 330 is not shown, however, Figure 7B-Figure 7C as well as Figure 8A-8C A mounting portion 399 for the curved lens 330 is shown.

[0118] like Fig. 7A , Figure 7B , Fig. 8A and Figure 8B As shown, the curved lens 330 includes a plurality of sub-lenses 331 arranged around the optical center 382 of the curved lens 330 and connected to each other, and each of the plurality of sub-lenses 331 includes a first curved surface 341 and a second curved surface 342 opposite to each other. Fig. 7A , Figure 7B , Fig. 8A and Figure 8B As shown, the optical center 382 of the curved lens 330 is the intersection of the axes 311 of the plurality of sub-lenses 331 .

[0119] For example, the plurality of sub-lenses 331 are identical to each other, so as to reduce the manufacturing cost of other optical elements of the display device 300 including the curved lens 330 .

[0120] There are three points that need to be explained.

[0121] (1) The multiple sub-lenses 331 are identical to each other, which means that the curved surface shape of the first curved surface 341 of each of the multiple sub-lenses 331 is equal to the curved surface shape of the second curved surface 342, and the portion of one of the multiple sub-lenses 331 corresponding to the field of view of the sub-lens 331 can form the portion of another of the multiple sub-lenses 331 corresponding to the field of view of the sub-lens 331 through decentration and deflection. For example, in the case where none of the multiple sub-lenses 331 has a portion corresponding to outside the field of view, the multiple sub-lenses 331 are identical, that is, one of the multiple sub-lenses 331 can form another of the multiple sub-lenses 331 through decentration and deflection.

[0122] (2) According to actual application requirements, the multiple sub-lenses 331 can also be set to be unequally identical to further improve the display quality and reduce the difficulty of manufacturing the curved lens 330 and other optical elements in the display device including the curved lens 330.

[0123] (3) The number of the plurality of sub-lenses 331 is not limited to three. According to actual application requirements, the number of the plurality of sub-lenses 331 may also be equal to five or other suitable odd numbers. In this case, due to Fig. 7A The curved lens 330 shown may include a plurality of identical sub-lenses 331 even when the number of the plurality of sub-lenses 331 is not an even number, thereby increasing the degree of freedom in designing the curved lens 330 and a display device including the curved lens 330. For example, the number of the plurality of sub-lenses 331 may also be set to an even number.

[0124] like Fig. 7A As shown, a plurality of first curved surfaces 341 are connected to each other to form a light emitting surface ( Fig. 7A The second curved surfaces 342 are connected to each other to form the light incident surface of the curved lens 330 ( Fig. 7A Compared with the light incident surface, the light emitting surface is closer to the optical center 382 of the curved lens 330. Fig. 7A As shown, the optical center 382 is the origin of the XYZ-coordinate system.

[0125] like Fig. 7A As shown, the light incident surface is a convex surface as a whole, and the light emitting surface is a concave surface as a whole. It should be noted that the light incident surface is a convex surface as a whole means that when viewed from the side of the light incident surface away from the optical center 382 of the curved lens 330, the light incident surface and the global axis of the curved lens 330 (for example, Fig. 7AThe intersection of the light emitting surface and the curved lens 330 (the intersection of the maximum effective field of view of the curved lens 330 and the curved lens 330, for example, the annular intersection) is closer to the observer than the edge of the curved lens 330; the light emitting surface is a concave surface as a whole, which means that when viewed from the side of the light emitting surface close to the optical center 382 of the curved lens 330, the light emitting surface and the global axis 310 (for example, Fig. 7A The intersection of the Z axis in the image) is farther from the observer than the edge of the curved lens 330 (the intersection line of the maximum effective field of view of the curved lens 330 and the curved lens 330). Figure 3A and Figure 5 ) “A convex surface or a concave surface as a whole” also has a similar definition and will not be repeated here.

[0126] like Fig. 7A , Figure 7C , Fig. 8A and Figure 8C As shown, each of the multiple sub-lenses 331 includes two sub-lenses 3311 that are arranged around the optical center 382 and connected to each other; each sub-lens 3311 includes a first sub-surface 3411 and a second sub-surface 3421 that are opposite to each other; the first sub-surface 3411 is a first free-form surface, and the second sub-surface 3421 is a second free-form surface, and the surface shape of the first free-form surface is, for example, different from the surface shape of the second free-form surface. The multiple first sub-surfaces 3411 are connected to each other to form a first surface 341, and the multiple second sub-surfaces 3421 are connected to each other to form a second surface 342. For example, the two sub-lenses 3311 are relative to the first plane (that is, Fig. 7A The YOZ plane) is symmetrically distributed.

[0127] It should be noted that the number of sub-sub-lenses 3311 included in each sub-lens 331 is not limited to two. According to actual application requirements, the number of sub-sub-lenses 3311 included in each sub-lens 331 can also be set to three or other applicable numbers.

[0128] For example, Fig. 7A The curved lens 330 shown can be formed by an integrated manufacturing process (eg, integrated injection molding) so that there is no interface between adjacent sub-lenses 331 .

[0129] At least one embodiment of the present disclosure further provides a display device 300, which includes Fig. 7A For example, the curved lens 330 can be installed in the display device 300 via the installation portion 399 of the curved lens 330. It should be noted that, Fig. 8AThe shape and setting position of the mounting portion 399 of the curved lens 330 shown are examples. According to actual application requirements, the mounting portion 399 of the curved lens 330 can also adopt other shapes and setting positions.

[0130] Fig.9A Yes Fig. 7A The display device 300 of the curved lens 330 shown is a first plane (ie, Fig. 7A A cross-sectional view obtained by cutting the YOZ plane; Fig. 9B Yes Fig. 7A Another cross-sectional view obtained by cutting the display device 300 with the curved lens 330 by a first plane; Fig. 10A Yes Fig. 7A The display device 300 shown with the curved lens 330 is surrounded by a second plane (ie, Fig. 7A A cross-sectional view obtained by cutting through the XOZ plane; Fig. 10B Yes Fig. 7A Another cross-sectional view obtained after the display device 300 with the curved lens 330 is cut by a second plane; Fig. 10C Yes Fig. 7A Another cross-sectional view of the display device 300 with the curved lens 330 shown is obtained by cutting the display device 300 with the curved lens 330 by the second plane. Fig.9A and Fig. 9B Other optical elements between the curved lens 330 and the display screen 321 are not shown; however, Figure 10A-10C One example of other optical elements between the curved lens 330 and the display screen 321 is shown.

[0131] like Fig.9A As shown, the display device 300 further includes a plurality of display channels 301; the plurality of sub-lenses 331 of the curved lens 330 correspond one to one with the plurality of display channels 301; and each of the plurality of sub-lenses 331 is disposed in a corresponding display channel 301. Fig.9A As shown, the imaging surfaces of the multiple display channels 301 are located on the same plane, thereby further improving the display quality of the display device 300 .

[0132] For example, each display sub-image 361 is a plane image, and the imaging surfaces of the plurality of display channels 301 are planes and perpendicular to the global axis 310 of the curved lens 330 (for example, at Fig.9A The axis 311 of the sub-lens 331 of the middle display channel 301 is shown, that is, the Z axis). It should be noted that, Fig.9A The imaging surfaces of the multiple display channels 301 of the display device 300 shown are not limited to being located on the same plane. Fig.9AThe imaging surfaces of the multiple display channels 301 of the display device 300 shown in the figure may also be located on the same curved surface, or intersect with each other; the specific implementation methods may refer to Fig. 6A and Figure 2 The examples shown are not described in detail here.

[0133] like Fig.9A As shown, the pupils 371 of the plurality of sub-lenses 331 are located at different positions and are arranged around the optical center 382 of the curved lens 330. For example, by arranging the pupils 371 of the plurality of sub-lenses 331 around the optical center 382 of the curved lens 330, the following two technical effects can be achieved: first, the pupils of the user can better receive the light output by the display device 300 for forming the display sub-image 361, thereby improving the display effect of the display device 300; second, the angle (or deflection angle) between adjacent sub-lenses 331 can be reduced, thereby reducing the thickness of the curved lens 330, and enabling the curved lens 330 to be formed in one piece (for example, by integrated injection molding).

[0134] like Fig.9A As shown, the optical center 382 of the curved lens 330 is located on a side of the pupil 371 of the plurality of sub-lenses 331 that is away from the curved lens 330 .

[0135] It should be noted that in some examples, Fig.9A The display device 300 shown may also use a curved lens with a single pupil, and Fig. 7A The curved lens 330 shown may also be designed so that the pupils 371 of the plurality of sub-lenses 331 are all located at the same position.

[0136] For example, the pupils 371 of the plurality of sub-lenses 331 may be located at different positions on the surface of the user's eyeball. For example, the center of the user's eyeball may be approximately located at the optical center 382 of the curved lens 330. For example, the axis 311 of each of the plurality of sub-lenses 331 refers to a virtual straight line that is perpendicular to the plane where the pupils 371 of the sub-lens 331 are located and passes through the optical center 382 of the curved lens 330.

[0137] For example, Fig. 9B As shown, the angles θ32 of adjacent first curved surfaces 341 of the curved lens 330 are all greater than 120 degrees (for example, 140 degrees, 150 degrees or 160 degrees) to reduce the thickness of the gaps between adjacent sub-lenses 331 and the overall thickness of the curved lens 330, so that the curved lens 330 can be formed in an integrated manner (for example, integrated injection molding).

[0138] In some examples, such as Fig. 9B As shown, the included angle θ32 between the first curved surfaces 341 of adjacent sub-lenses 331 refers to the angle between the first curved surfaces 341 and the first curved surfaces 341 of adjacent sub-lenses 331. Fig. 7A The angle between the first curves obtained by sectioning the first curved surfaces 341 of adjacent sub-lenses 331 on the YOZ plane of the lens 330 is the angle between the tangent lines (for example, tangent line 391 and tangent line 392) of the first curves of adjacent sub-lenses 331 passing through the intersection point 390 of the first curves of adjacent sub-lenses 331. Fig. 9B As shown, the overall thickness of the curved lens 330 is the thickness of the curved lens 330 at the global axis 310 of the curved lens 330 (e.g., at Fig.9A The length of the positive projection on the axis 311 (ie, the Z axis) of the sub-lens 331 of the middle display channel 301 shown.

[0139] like Fig. 9B As shown, the first curve of the adjacent sub-lens 331 includes a first M-shaped portion, the first M-shaped portion includes two first convex points (first convex point 394 and first convex point 395), and the first M-shaped portion (the first curve of the adjacent sub-lens 331) is located on the same side of the line 393 connecting the two first convex points, and thus is substantially in an M shape. Fig. 9B As shown, the thickness of the gap between adjacent sub-lenses 331 of the curved lens 330 is the distance between the intersection point 390 of the first curve of the adjacent sub-lenses 331 and the line 394 connecting the two first convex points. Fig. 9B As shown, the second curve obtained by cutting two adjacent second curved surfaces 342 by the first plane includes a ridge-shaped portion.

[0140] For example, Figure 10A-10C As shown, each display screen 321 may include two sub-screens, and the two sub-screens correspond to two sub-lenses 3311 respectively; a cemented lens 351 may be arranged between each display sub-screen and the corresponding sub-lens 3311, and multiple cemented lenses 351 corresponding to multiple sub-lenses 3311 are arranged around the optical center 382 of the curved lens 330, and may be combined with each other to form a lens group 350 superimposed on the curved lens 330. For example, a partially reflective and partially transmissive film (semi-reflective and semi-transmissive film) may be arranged on the surface of each of the multiple cemented lenses 351 close to the display sub-screen; a reflective polarizer or a reflective polarizing film may be arranged on the surface of each of the multiple cemented lenses 351 close to the curved lens, which will not be described in detail here.

[0141] Fig. 10D Shown including Fig. 7A The light path simulation result diagram of the display device 300 with the curved lens 330 shown in FIG. 3 is as follows: Fig. 10D The curved lens 330 shown also includes a portion outside the field of view of the curved lens 330 and the display device 300, so that Fig. 10D The shape of the curved lens shown is similar to Fig. 10CThe shapes of the curved lenses shown are not completely consistent. For example, when the curved lens 330 is formed in an integrated manner, the mold used to form the curved lens does not include the portion corresponding to the curved lens 330 that is outside the field of view. Therefore, the final product of the curved lens may not include the portion corresponding to the curved lens 330 that is outside the field of view. Figures 10A-10D As shown, the pupils 371 of the two sub-lenses 3311 are located at the same position, but the embodiments of the present disclosure are not limited thereto; according to actual application requirements, the pupils 371 of the two sub-lenses 3311 can also be located at different positions and arranged around the center of the curved lens 330 .

[0142] like Fig. 10B As shown, the angle θ41 between two adjacent first sub-curved surfaces 3411 is greater than 120 degrees (for example, greater than 130 degrees, greater than 140 degrees, greater than 150 degrees, or greater than 160 degrees). In some examples, the angle between the first sub-curved surfaces 3411 of adjacent sub-lenses 3311 refers to the angle between the first sub-curved surfaces 3411 of adjacent sub-lenses 3311 using the second plane (that is, Fig. 7A The angle between the second curves obtained by sectioning the first sub-surfaces 3411 of adjacent sub-lenses 3311 along the XOZ plane of the sub-lenses 3311; the angle between the second curves of adjacent sub-lenses 3311 refers to the angle between the tangents (for example, tangent 387 and tangent 388) of the second curves of adjacent sub-lenses 3311 passing through the intersection point 386 of the second curves of adjacent sub-lenses 3311.

[0143] like Fig. 10B As shown, the center thickness of each of the multiple sub-lens 331 is greater than 2.5 mm (for example, 3 mm, 3.5 mm or 4 mm); the edge thickness of each of the multiple sub-lens 331 is greater than 1.2 mm (for example, 1.5 mm, 1.8 mm or 2 mm); the ratio of the center thickness to the edge thickness of each of the multiple sub-lens 331 is between 1.8-3 (for example, 2, 2.2, 2.5, 2.7 or 2.9).

[0144] In some examples, the center thickness of the sub-lens 331 refers to a virtual straight line where the zero-degree field of view of the sub-lens 331 is located (for example, Fig. 10B The center thickness of a sub-lens 331 is the length of the intersection of a virtual straight line parallel to the virtual straight line where the zero-degree field of view of the sub-lens 331 is located and passes through the location of the maximum field of view of the sub-lens 331 (that is, the intersection of the maximum field of view of the sub-lens 331 and the light-emitting surface) and the sub-lens 331. For example, the center thickness and edge thickness of sub-lenses in other examples of the present disclosure also meet the above definition and are not described in detail.

[0145] like Fig. 10C As shown, two adjacent first sub-surfaces 3411 are separated by a second plane (ie, Fig. 7A The second curve obtained by sectioning the second M-shaped portion includes two second convex points (second convex points 397 and 398), and the second curve is located on the same side of the line connecting the two second convex points. Fig. 10C As shown, two adjacent second sub-surfaces 3421 are separated by a second plane (ie, Fig. 7A The curve obtained by cutting in the XOZ plane includes the ridge-shaped part.

[0146] For example, the surface shapes of the first sub-surface 3411 and the second sub-surface 3421 can both be represented by XY polynomials.

[0147] For example, the surface shape z1(x, y) of each of the plurality of first sub-surfaces 3411 and the surface shape z2(x, y) of each of the plurality of second sub-surfaces 3421 satisfy the following expressions (1) and (2), respectively:

[0148]

[0149]

[0150] Here, c1 is the curvature radius of each of the multiple first sub-surfaces 3411; k1 is the quadratic surface constant of each of the multiple first sub-surfaces 3411, Cmn1 is the mn-th order coefficient of each of the multiple first sub-surfaces 3411; c2 is the curvature radius of each of the multiple second sub-surfaces 3421; k2 is the quadratic surface constant of each of the multiple second sub-surfaces 3421; Cmn2 is the mn-th order coefficient of each of the multiple second sub-surfaces 3421; m+n is greater than or equal to 1 and less than or equal to p.

[0151] For example, the absolute value of c2 is greater than the absolute value of c1. For example, the ratio of the absolute value of c2 to the absolute value of c1 is between 3 and 7 (for example, 4, 5 or 6).

[0152] For example, when the first curved surface 341 includes two first sub-curves 3411 and the second curved surface 342 includes two second sub-curves 3421, the curvature radii of the two first sub-curves 3411 are the same as each other, and the quadratic surface constants of the two first sub-curves 3411 are the same as each other; the curvature radii of the two second sub-curves 3421 are the same as each other, and the quadratic surface constants of the two second sub-curves 3421 are the same as each other.

[0153] For example, the first curved surface 341 includes Fig. 10A The first subsurface on the lower side and the Fig. 10A The second curved surface 342 includes a second curved surface located at Fig. 10A The third subsurface on the lower side and the Fig. 10AThe fourth sub-sub-surface on the upper side; the surface shape z1_1(x, y) of the first sub-sub-surface, the surface shape z1_2(x, y) of the first sub-sub-surface, the surface shape z2_1(x, y) of the third sub-sub-surface and the surface shape z2_2(x, y) of the fourth sub-sub-surface respectively satisfy the following expressions (3)-(6), that is, Cmn1 of the first sub-sub-surface and Cmn1 of the second sub-sub-surface are equal to Cmn1_1 and Cmn1_2 respectively; Cmn2 of the third sub-sub-surface and Cmn4 of the fourth sub-sub-surface are equal to Cmn2_1 and Cmn2_2 respectively.

[0154]

[0155]

[0156]

[0157]

[0158] For example, when the value of m is an odd number, the values ​​of Cmn1 and Cmn2 are both zero, so that the sub-lens 3311 can be relative to the first plane (that is, Fig. 7A The YOZ plane) is symmetrically distributed.

[0159] For example, when the value of m+n is an odd number, the sum of the mn-th order coefficients of the multiple first sub-surfaces 3411 is equal to zero (for example, the sum of Cmn1_1 and Cmn1_2 is equal to zero); the sum of the mn-th order coefficients of the multiple second sub-surfaces 3421 is equal to zero (for example, the sum of Cmn2_1 and Cmn2_2 is equal to zero), so that two adjacent sub-lenses 3311 can be spliced ​​with each other.

[0160] In an example, the values ​​of Cmn1_1 and Cmn1_2 and the values ​​of Cmn2_1 and Cmn2_2 are shown in Table 1 and Table 2 respectively.

[0161] Table 1

[0162] Cmn1_1 Cmn1_2 m=0,n=1:5.226872 m=0,n=1:-5.226872 m=2,n=0:2.3683177 m=2,n=0:2.3683177 m=0,n=2:7.2707216 m=0,n=2:7.2707216 m=2,n=1:-0.13076123 m=2,n=1:0.13076123 m=0,n=3:3.5493103 m=0,n=3:-3.5493103 m=4,n=0:0.37003974 m=4,n=0:0.37003974 m=2,n=2:0.24139937 m=2,n=2:0.24139937 m=0,n=4:1.3298504 m=0,n=4:1.3298504 m=4,n=1:0.91543522 m=4,n=1:-0.91543522 m=2,n=3:0.23909709 m=2,n=3:-0.23909709 m=0,n=5:0.30600293 m=0,n=5:-0.30600293 m=6,n=0:0.38812337 m=6,n=0:0.38812337 m=4,n=2:0.64560608 m=4,n=2:0.64560608 m=2,n=4:0.067475608 m=2,n=4:0.067475608 m=0,n=6:0.040674688 m=0,n=6:0.040674688 m=6,n=1:0.34054159 m=6,n=1:-0.34054159 m=4,n=3:0.18693421 m=4,n=3:-0.18693421 m=2,n=5:0.007150644 m=2,n=5:-0.0071506442 m=0,n=7:0.00271526 m=0,n=7:-0.0027152603 m=8,n=0:0.006099753 m=8,n=0:0.0060997526 m=6,n=2:0.092716324 m=6,n=2:0.092716324 m=4,n=4:0.023069232 m=4,n=4:0.023069232 m=2,n=6:0.000185491 m=2,n=6:0.0001854912 m=0,n=8:5.99344e-05 m=0,n=8:5.9934422e-05 m=8,n=1:0.001486721 m=8,n=1:-0.0014867211 m=6,n=3:0.008087659 m=6,n=3:-0.0080876588 m=4,n=5:0.000963054 m=4,n=5:-0.00096305378

[0163] Table 2

[0164] Cmn2_1 Cmn2_2 m=0,n=1:3.3948842 m=0,n=1:-3.3948842 m=2,n=0:-0.41704482 m=2,n=0:-0.41704482 m=0,n=2:5.1070433 m=0,n=2:5.1070433 m=2,n=1:-1.3349282 m=2,n=1:1.3349282 m=0,n=3:4.2274449 m=0,n=3:-4.2274449 m=4,n=0:0.16889143 m=4,n=0:0.16889143 m=2,n=2:-0.53017686 m=2,n=2:-0.53017686 m=0,n=4:2.0561566 m=0,n=4:2.0561566 m=4,n=1:0.41393656 m=4,n=1:-0.41393656 m=2,n=3:-0.05432783 m=2,n=3:0.05432783 m=0,n=5:0.58605319 m=0,n=5:-0.58605319 m=6,n=0:0.31023519 m=6,n=0:0.31023519 m=4,n=2:0.26196894 m=4,n=2:0.26196894 m=2,n=4:0.005799915 m=2,n=4:0.0057999148 m=0,n=6:0.095577293 m=0,n=6:0.095577293 m=6,n=1:0.25433855 m=6,n=1:-0.25433855 m=4,n=3:0.046292184 m=4,n=3:-0.046292184 m=2,n=5:-0.000825933 m=2,n=5:0.00082593302 m=0,n=7:0.00797778 m=0,n=7:-0.0079777803 m=8,n=0:0.000243206 m=8,n=0:0.00024320633 m=6,n=2:0.064366742 m=6,n=2:0.064366742 m=4,n=4:-0.001273274 m=4,n=4:-0.0012732741 m=2,n=6:-0.000323851 m=2,n=6:-0.00032385128 m=0,n=8:0.000251122 m=0,n=8:0.00025112212 m=8,n=1:0.000205228 m=8,n=1:-0.00020522791 m=6,n=3:0.005264855 m=6,n=3:-0.0052648552 m=4,n=5:-0.000606115 m=4,n=5:0.00060611458

[0165] In another example, the values ​​of Cmn1_1 and Cmn1_2 and the values ​​of Cmn2_1 and Cmn2_2 are shown in Table 3 and Table 4 respectively.

[0166] Table 3

[0167] Cmn1_1 Cmn1_2 m=0,n=1:4.226872 m=0,n=1:-4.226872 m=2,n=0:2.3683177 m=2,n=0:2.3683177 m=0,n=2:6.2731217 m=0,n=2:6.2731217 m=2,n=1:-0.13076123 m=2,n=1:0.13076123 m=0,n=3:4.7993221 m=0,n=3:-4.7993221 m=4,n=0:0.37003974 m=4,n=0:0.37003974 m=2,n=2:0.24139937 m=2,n=2:0.24139937 m=0,n=4:1.3298504 m=0,n=4:1.3298504 m=4,n=1:0.91543522 m=4,n=1:-0.91543522 m=2,n=3:0.23909709 m=2,n=3:-0.23909709 m=0,n=5:0.30600293 m=0,n=5:-0.30600293 m=6,n=0:0.38812337 m=6,n=0:0.38812337 m=4,n=2:0.64560608 m=4,n=2:0.64560608 m=2,n=4:0.067475608 m=2,n=4:0.067475608 m=0,n=6:0.040674688 m=0,n=6:0.040674688 m=6,n=1:0.34054159 m=6,n=1:-0.34054159 m=4,n=3:0.18693421 m=4,n=3:-0.18693421 m=2,n=5:0.007150644 m=2,n=5:-0.0071506442 m=0,n=7:0.00271526 m=0,n=7:-0.0027152603 m=8,n=0:0.006099753 m=8,n=0:0.0060997526 m=6,n=2:0.092716324 m=6,n=2:0.092716324 m=4,n=4:0.023069232 m=4,n=4:0.023069232 m=2,n=6:0.000185491 m=2,n=6:0.0001854912 m=0,n=8:5.99344e-05 m=0,n=8:5.9934422e-05 m=8,n=1:0.001486721 m=8,n=1:-0.0014867211 m=6,n=3:0.008087659 m=6,n=3:-0.0080876588 m=4,n=5:0.000963054 m=4,n=5:-0.00096305378

[0168] Table 4

[0169] Cmn2_1 Cmn2_2 m=0,n=1:4.126941 m=0,n=1:-4.126941 m=2,n=0:-0.41704482 m=2,n=0:-0.41704482 m=0,n=2:6.5578331 m=0,n=2:6.5578331 m=2,n=1:-1.3349282 m=2,n=1:1.3349282 m=0,n=3:4.2274449 m=0,n=3:-4.2274449 m=4,n=0:0.57989143 m=4,n=0:0.57989143 m=2,n=2:-0.53017686 m=2,n=2:-0.53017686 m=0,n=4:2.0561566 m=0,n=4:2.0561566 m=4,n=1:0.41393656 m=4,n=1:-0.41393656 m=2,n=3:-0.05432783 m=2,n=3:0.05432783 m=0,n=5:0.58605319 m=0,n=5:-0.58605319 m=6,n=0:0.31023519 m=6,n=0:0.31023519 m=4,n=2:0.46196894 m=4,n=2:0.46196894 m=2,n=4:0.005799915 m=2,n=4:0.0057999148 m=0,n=6:0.095577293 m=0,n=6:0.095577293 m=6,n=1:0.25433855 m=6,n=1:-0.25433855 m=4,n=3:0.046292184 m=4,n=3:-0.046292184 m=2,n=5:-0.000825933 m=2,n=5:0.00082593302 m=0,n=7:0.00797778 m=0,n=7:-0.0079777803 m=8,n=0:0.000243206 m=8,n=0:0.00024320633 m=6,n=2:0.064366742 m=6,n=2:0.064366742 m=4,n=4:-0.001273274 m=4,n=4:-0.0012732741 m=2,n=6:-0.000323851 m=2,n=6:-0.00032385128 m=0,n=8:0.000251122 m=0,n=8:0.00025112212 m=8,n=1:0.000205228 m=8,n=1:-0.00020522791 m=6,n=3:0.005264855 m=6,n=3:-0.0052648552 m=4,n=5:-0.000606115 m=4,n=5:0.00060611458

[0170] In yet another example, the values ​​of Cmn1_1 and Cmn1_2 and the values ​​of Cmn2_1 and Cmn2_2 are shown in Table 5 and Table 6 respectively.

[0171] Table 5

[0172] Cmn1_1 Cmn1_2 m=0,n=1:4.226872 m=0,n=1:-4.226872 m=2,n=0:2.3683177 m=2,n=0:2.3683177 m=0,n=2:6.2731217 m=0,n=2:6.2731217 m=2,n=1:-0.13076123 m=2,n=1:0.13076123 m=0,n=3:4.7993221 m=0,n=3:-4.7993221 m=4,n=0:0.37003974 m=4,n=0:0.37003974 m=2,n=2:0.24139937 m=2,n=2:0.24139937 m=0,n=4:2.8234514 m=0,n=4:2.8234514 m=4,n=1:0.91543522 m=4,n=1:-0.91543522 m=2,n=3:0.23909709 m=2,n=3:-0.23909709 m=0,n=5:0.30600293 m=0,n=5:-0.30600293 m=6,n=0:0.38812337 m=6,n=0:0.38812337 m=4,n=2:0.64560608 m=4,n=2:0.64560608 m=2,n=4:0.067475608 m=2,n=4:0.067475608 m=0,n=6:0.040674688 m=0,n=6:0.040674688 m=6,n=1:0.34054159 m=6,n=1:-0.34054159 m=4,n=3:0.18693421 m=4,n=3:-0.18693421 m=2,n=5:0.007150644 m=2,n=5:-0.0071506442 m=0,n=7:0.00271526 m=0,n=7:-0.0027152603 m=8,n=0:0.006099753 m=8,n=0:0.0060997526 m=6,n=2:0.092716324 m=6,n=2:0.092716324 m=4,n=4:0.023069232 m=4,n=4:0.023069232 m=2,n=6:0.000185491 m=2,n=6:0.0001854912 m=0,n=8:5.99344e-05 m=0,n=8:5.9934422e-05 m=8,n=1:0.001486721 m=8,n=1:-0.0014867211 m=6,n=3:0.008087659 m=6,n=3:-0.0080876588 m=4,n=5:0.000963054 m=4,n=5:-0.00096305378

[0173] Table 6

[0174] Cmn2_1 Cmn2_2 m=0,n=1:4.126941 m=0,n=1:-4.126941 m=2,n=0:-0.41704482 m=2,n=0:-0.41704482 m=0,n=2:6.5578331 m=0,n=2:6.5578331 m=2,n=1:-1.3349282 m=2,n=1:1.3349282 m=0,n=3:4.2274449 m=0,n=3:-4.2274449 m=4,n=0:0.16889143 m=4,n=0:0.16889143 m=2,n=2:-0.53017686 m=2,n=2:-0.53017686 m=0,n=4:1.3784146 m=0,n=4:1.3784146 m=4,n=1:0.41393656 m=4,n=1:-0.41393656 m=2,n=3:-0.05432783 m=2,n=3:0.05432783 m=0,n=5:0.58605319 m=0,n=5:-0.58605319 m=6,n=0:0.31023519 m=6,n=0:0.31023519 m=4,n=2:0.26196894 m=4,n=2:0.26196894 m=2,n=4:0.005799915 m=2,n=4:0.0057999148 m=0,n=6:0.095577293 m=0,n=6:0.095577293 m=6,n=1:0.25433855 m=6,n=1:-0.25433855 m=4,n=3:0.046292184 m=4,n=3:-0.046292184 m=2,n=5:-0.000825933 m=2,n=5:0.00082593302 m=0,n=7:0.00797778 m=0,n=7:-0.0079777803 m=8,n=0:0.000243206 m=8,n=0:0.00024320633 m=6,n=2:0.064366742 m=6,n=2:0.064366742 m=4,n=4:-0.001273274 m=4,n=4:-0.0012732741 m=2,n=6:-0.000323851 m=2,n=6:-0.00032385128 m=0,n=8:0.000251122 m=0,n=8:0.00025112212 m=8,n=1:0.000205228 m=8,n=1:-0.00020522791 m=6,n=3:0.005264855 m=6,n=3:-0.0052648552 m=4,n=5:-0.000606115 m=4,n=5:0.00060611458

[0175] There are several points that need to be explained.

[0176] (1) In order to more clearly distinguish the various sub-lenses of the curved lens, the dividing lines between adjacent sub-lenses of the curved lens or the dividing lines of multiple display channels of a display system including the curved lens are shown in the accompanying drawings; however, in actual products, the above-mentioned dividing lines do not exist.

[0177] (2) In some examples, “plurality” means “greater than or equal to two”.

[0178] (3) In some examples, the light incident surface and the light exit surface of the curved lens are relative to the transmission direction of the light emitted by the display screen in the final display device. For example, the light emitted by the display screen enters the curved lens via the light incident surface; and then leaves the curved lens via the light exit surface.

[0179] (4) In some examples, the curved lens may not be provided with a mounting portion. In this case, the curved lens may be provided in the display system via a mounting portion of the display system.

[0180] (5) For other components of the display device (such as a thin film transistor control device, an image data encoding / decoding device, a row scan driver, a column scan driver, a clock circuit, etc.), applicable components can be used. These are all things that should be understood by ordinary technicians in the field and are not elaborated here, nor should they be regarded as limitations on the present disclosure.

[0181] Although the disclosure has been described in detail above with general descriptions and specific implementation methods, it is obvious to those skilled in the art that some modifications or improvements may be made to the embodiments of the disclosure. Therefore, these modifications or improvements made without departing from the spirit of the disclosure are within the scope of protection claimed by the disclosure.

[0182] The above description is merely an exemplary embodiment of the present disclosure and is not intended to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A curved lens, comprising a plurality of sub-lenses arranged around the optical center of the curved lens and connected to each other; in, Each of the plurality of sub-lenses includes a first curved surface and a second curved surface opposite to each other; A plurality of the first curved surfaces are connected to each other to form a light exit surface of the curved lens, and a plurality of the second curved surfaces are connected to each other to form a light entrance surface of the curved lens. Compared with the light entrance surface, the light exit surface is closer to the optical center of the curved lens; The light incident surface is a convex surface as a whole, and the light emitting surface is a concave surface as a whole; as well as The plurality of first curved surfaces and the plurality of second curved surfaces are all free-form surfaces; The center thickness of each of the multiple sub-lens is greater than 2.5 mm, the edge thickness of each of the multiple sub-lens is greater than 1.2 mm, and the ratio of the center thickness to the edge thickness of each of the multiple sub-lens is between 1.8 and 2.7; the angle between adjacent first curved surfaces is greater than 120 degrees; the ratio of the absolute value of the radius of curvature of the second curved surface to the absolute value of the radius of curvature of the first curved surface is between 3 and 7.

2. The curved lens according to claim 1, wherein: The plurality of sub-lenses are identical to each other.

3. The curved lens according to claim 2, wherein: The number of the plurality of sub-lenses is an odd number, and the number of the plurality of sub-lenses is three.

4. The curved lens according to any one of claims 1 to 3, wherein: Each of the plurality of sub-lenses comprises a plurality of sub-sub-lenses arranged around the optical center and connected to each other; Each of the sub-lenses comprises a first sub-curved surface and a second sub-curved surface opposite to each other; The first sub-curved surface is a first free-curved surface, and the second sub-curved surface is a second free-curved surface; as well as A plurality of the first sub-curved surfaces are connected to each other to form the first curved surface, and a plurality of the second sub-curved surfaces are connected to each other to form the second curved surface.

5. The curved lens according to claim 4, wherein: Each of the plurality of sub-lenses includes two sub-sub-lenses, and the two sub-sub-lenses are symmetrically distributed relative to the first plane.

6. The curved lens according to claim 4, wherein: The included angle between two adjacent first sub-curved surfaces is greater than 140 degrees.

7. The curved lens according to claim 4, wherein: The surface shape z1(x, y) of each of the plurality of first sub-surfaces and the surface shape z2(x, y) of each of the plurality of second sub-surfaces satisfy the following expressions (1) and (2), respectively: Among them, c1 is the curvature radius of each of the multiple first sub-surfaces; k1 is the quadratic surface constant of each of the multiple first sub-surfaces, Cmn1 is the mn-th order coefficient of each of the multiple first sub-surfaces; c2 is the curvature radius of each of the multiple second sub-surfaces; k2 is the quadratic surface constant of each of the multiple second sub-surfaces; Cmn2 is the mn-th order coefficient of each of the multiple second sub-surfaces; m+n is greater than or equal to 1 and less than or equal to p.

8. The curved lens according to claim 7, wherein: When the value of m is an odd number, the values ​​of Cmn1 and Cmn2 are both zero; as well as When the value of m+n is an odd number, the sum of the coefficients of the mn-th order of the multiple first sub-surfaces is equal to zero, and the sum of the coefficients of the mn-th order of the multiple second sub-surfaces is equal to zero.

9. The curved lens according to claim 8, wherein: The absolute value of c2 is greater than the absolute value of c1; The ratio of the absolute value of c2 to the absolute value of c1 is between 3 and 7.

10. The curved lens according to claim 4, wherein: A first curve obtained by cutting two adjacent first curved surfaces by a first plane includes a first M-shaped portion; The first M-shaped portion includes two first convex points, and the first curves are both located on the same side of a line connecting the two first convex points; The second curves obtained by cutting two adjacent second curved surfaces by the first plane include ridge-shaped parts; A second curve obtained by sectioning two adjacent first sub-surfaces by a second plane includes a second M-shaped portion; and The second M-shaped portion includes two second protrusions, and the second curves are both located on the same side of a line connecting the two second protrusions.

11. The curved lens according to any one of claims 1 to 3, wherein: The curved lens is integrally injection molded so that there is no interface between adjacent sub-lenses.

12. The curved lens according to any one of claims 1 to 3, wherein: The pupils of the plurality of sub-lenses are located at different positions and are arranged around the optical center of the curved lens.

13. The curved lens according to claim 12, wherein: The optical center of the curved lens is located on a side of the pupils of the plurality of sub-lenses away from the curved lens.

14. The curved lens according to claim 13, wherein: The optical center of the curved lens is the intersection of the axes of the plurality of sub-lenses; and An axis of each of the plurality of sub-lenses is perpendicular to a plane where a pupil of the sub-lens is located.

15. A display device, comprising the curved lens according to any one of claims 1 to 14.

16. The display device according to claim 15, further comprising a plurality of display channels, wherein: The multiple sub-lenses of the curved lens correspond one-to-one to the multiple display channels; and Each of the plurality of sub-lenses is disposed in a corresponding display channel.

17. The display device according to claim 16, wherein: The imaging surfaces of the multiple display channels are located on the same curved surface or on the same plane.

18. The display device according to claim 17, wherein: In the case where the imaging surfaces of the multiple display channels are located on the same plane, the imaging surfaces of the multiple display channels are all perpendicular to the global axis of the curved lens.

Images