CN112882240A

CN112882240A - Display device and display method

Info

Publication number: CN112882240A
Application number: CN202110281197.0A
Authority: CN
Inventors: 李凡月; 黄伟; 沈宝良
Original assignee: Shihu Technology Nanjing Co Ltd
Current assignee: Shihu Technology Nanjing Co Ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-06-01
Also published as: WO2022193847A1

Abstract

The embodiment of the disclosure provides a display device and a display method. The display device includes an image source, an optical array, and a coupling lens. The image source comprises a plurality of sub-display areas; the optical array is positioned at the light-emitting side of the image source and comprises a plurality of optical structures arranged in an array; the coupling lens is located on a side of the optical array away from the image source. The plurality of sub display regions and the plurality of optical structures correspond one-to-one, and image light emitted from each sub display region is configured to be incident on the coupling lens through the corresponding optical structure. Each optical structure forms an optical channel, the image light emitted by each sub-display area is configured to be emitted from the corresponding optical channel, the directions of the main light rays of the light beams emitted from different optical channels are different, and the maximum angle of the included angle between the directions of the main light rays of the light beams emitted from different optical channels is 110-130 degrees, so that the light rays emitted by each sub-display area can be adjusted and optimized by independently adjusting the parameters of different optical channels.

Description

Display device and display method

Technical Field

At least one embodiment of the present disclosure relates to a display device and a display method.

Background

The augmented reality display technology and the near-field display device require a set of optical systems to amplify an image on the micro display screen and project the image on the retina, so that the image on the display screen is amplified and displayed in the eyes of a viewer. The design of various precision optical elements in an optical system has a significant impact on the improvement of imaging quality, volume and weight of the final product, and the like.

Disclosure of Invention

At least one embodiment of the present disclosure provides a display device and a display method. The display device provided by the embodiment of the disclosure can adjust and optimize the light emitted by each sub-display area by independently adjusting the parameters of different optical channels.

At least one embodiment of the present disclosure provides a display device including an image source, an optical array, and a coupling lens. The image source comprises a plurality of sub-display areas which are arrayed along a first direction and a second direction; the optical array is positioned on the light emergent side of the image source and comprises a plurality of optical structures which are arrayed along the first direction and the second direction; the coupling lens is located on a side of the optical array away from the image source. The plurality of sub-display regions and the plurality of optical structures are in one-to-one correspondence, and image light emitted from each sub-display region is configured to be incident on the coupling lens through the corresponding optical structure; each optical structure forms an optical channel, the image light emitted by each sub-display area is configured to be emitted from the corresponding optical channel, the directions of the main light rays of the light beams emitted from different optical channels are different, and the maximum angle of the included angle between the directions of the main light rays of the light beams emitted from different optical channels is 110-130 degrees.

For example, in the embodiments of the present disclosure, the image light emitted from each sub-display region is configured to exit only from the corresponding optical channel.

For example, in embodiments of the present disclosure, the sub-display areas overlap the corresponding optical structures in a direction perpendicular to a display surface of the image source; at least one of between adjacent sub-display regions and between adjacent optical structures is provided with a blocking portion so that image light emitted from each sub-display region exits only from the corresponding optical channel.

For example, in the embodiment of the disclosure, in a direction perpendicular to the display surface of the image source, the sub-display regions overlap the corresponding optical structures, and a waveguide channel is disposed between at least one sub-display region and the corresponding optical channel so that the image light emitted from the at least one sub-display region exits only the corresponding optical channel.

For example, in an embodiment of the present disclosure, each sub-display region includes one sub-pixel; or each sub-display area comprises a plurality of sub-pixels, and the directions of the main rays of the image light emitted by different sub-pixels in each sub-display area and emitted through the corresponding optical channels are different.

For example, in an embodiment of the present disclosure, each sub-display region includes a plurality of sub-pixels, and along an arrangement direction of the plurality of sub-pixels, a distance between adjacent sub-pixels in each sub-display region is a first distance, and a distance between two sub-pixels respectively located in adjacent sub-display regions and adjacent to each other is a second distance, where the first distance is smaller than the second distance.

For example, in embodiments of the present disclosure, each optical channel is a collimating optical channel configured to collimate image light incident to the optical channel.

For example, in embodiments of the present disclosure, the coupling lens is a collimating coupling lens and is configured to collimate light focused from each optical structure to the coupling lens.

For example, in an embodiment of the present disclosure, the optical array includes a multilayer optical array structure, each layer of the optical array structure includes a surface type structure having an optical refraction function and at least one of a spherical surface, an aspherical surface, a free-form surface, and a flat surface.

For example, in an embodiment of the present disclosure, the optical array includes a micro-curved array and a micro-planar array arranged in a stack, the micro-curved array is located on a side of the micro-planar array facing the image source, and each of the optical structures includes a micro-curved surface and a micro-planar surface; the micro-planes in at least some of the optical structures have different angles of inclination and/or the micro-curved surfaces in at least some of the optical structures have different curvatures.

For example, in an embodiment of the present disclosure, the micro-planar array includes a plurality of micro-planar structures arrayed along the first direction and the second direction, each micro-planar structure includes one micro-plane, adjacent micro-planar structures are connected by a connection portion, and a cross section of the micro-planar array taken by a plane perpendicular to the first direction or the second direction includes a serrated edge on a side where the micro-plane is located.

For example, in an embodiment of the present disclosure, the display device further includes: and the optical waveguide element is positioned on the light-emitting side of the coupling lens. The light emitted from the coupling lens enters the optical waveguide element, and is reflected by the optical waveguide element a plurality of times and then emitted from the optical waveguide element.

For example, in an embodiment of the present disclosure, the display device further includes: and the control device is connected with the image source and is configured to control the luminous intensity of the sub-pixels included in the sub-display area according to the corresponding relation between the image passing through the coupling lens and the field angle of the main ray of the sub-display area passing through the coupling lens.

For example, in an embodiment of the present disclosure, the control apparatus includes a processor and a memory including one or more computer program modules stored in the memory and configured to be executed by the processor, the one or more computer program modules including instructions for executing the image source to display an image.

For example, in embodiments of the present disclosure, the display device is a near-eye display device.

At least one embodiment of the present disclosure provides a display method applied to any one of the display devices, including: acquiring an image to be displayed, wherein the image to be displayed is an image passing through the coupling lens, the image to be displayed comprises a plurality of sub-image areas, and the plurality of sub-image areas correspond to the plurality of sub-display areas one to one; determining the relative coordinate position relation between the sub-image area of the image to be displayed and the corresponding sub-display area of the image source according to the field angle of the main ray of the sub-display area passing through the coupling lens; and controlling the luminous intensity of the sub-pixels included in the sub-display area according to the relative coordinate position relation.

For example, in an embodiment of the present disclosure, the plurality of sub-display regions are arranged in a matrix such that each sub-display region has a two-dimensional coordinate position, the plurality of sub-image regions are arranged in a matrix such that each sub-image region has a two-dimensional coordinate position, and the two-dimensional coordinate position of at least one of the plurality of sub-display regions is different from the two-dimensional coordinate position of the corresponding sub-image region.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 is a schematic partial structure diagram of a display device according to an embodiment of the present disclosure;

FIG. 2 is a schematic plan view of the sub-display regions of the matrix arrangement shown in FIG. 1;

fig. 3 is a partial structural schematic diagram of a display device provided according to an example of the embodiment of the present disclosure;

fig. 4 is a partial structural schematic view of a display device provided according to another example of the embodiment of the present disclosure;

fig. 5 is a partial structural schematic view of a display device provided according to another example of the embodiment of the present disclosure;

fig. 6 is a partial structural schematic view of a display device provided according to another example of the embodiment of the present disclosure;

fig. 7 is a partial structural schematic diagram of a display device provided in accordance with an example of the embodiment of the present disclosure;

fig. 8 is a partial structural schematic view of a display device provided according to another example of the embodiment of the present disclosure;

fig. 9 is a schematic partial structure diagram of a display device according to an embodiment of the present disclosure;

fig. 10 is a schematic partial structure diagram of a display device according to an embodiment of the present disclosure;

FIG. 11 is a basic image array formed by a plurality of sub-display regions in an image source;

FIG. 12 is a diagram of an image array to be displayed in an image to be displayed formed after passing through a coupling lens; and

fig. 13 is a block diagram of the control device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

Currently, products using near-eye display technology are receiving wide attention. Virtual reality glasses and augmented reality glasses based on optical waveguide technology are the most potential head-mounted displays in their compact structures. In the technology of the head-mounted display, especially when the head-mounted display needs a large field angle, some optical modules for collimating and imaging the image displayed by the image display source to infinity have complicated and bulky structures, which causes difficulty in processing, high cost and heavy equipment. In the design of some light-weight optical modules, optical structures such as prisms are adopted to form a turning light path, although the occupied space of the optical module is reduced, the weight of the optical module is not obviously reduced, and the optical module is formed by laminating and assembling the prisms, the flat plate, the lens and the like, and a very complicated processing method is still required, so that the production efficiency of the optical module is low, and the cost is high.

In the research, the inventors of the present application found that: how to simplify an optical module for collimating an image displayed by an imaging image display source in a near-eye display product becomes a problem which needs to be solved urgently.

The embodiment of the disclosure provides a display device and a display method. The display device includes an image source, an optical array, and a coupling lens. The image source comprises a plurality of sub-display areas which are arranged in an array along a first direction and a second direction; the optical array is positioned at the light-emitting side of the image source and comprises a plurality of optical structures which are arrayed along a first direction and a second direction; the coupling lens is located on a side of the optical array away from the image source. The plurality of sub display regions and the plurality of optical structures correspond one-to-one, and image light emitted from each sub display region is configured to be incident on the coupling lens through the corresponding optical structure. Each optical structure forms an optical channel, the image light emitted by each sub-display area is configured to be emitted from the corresponding optical channel, the directions of the main rays of the light beams emitted from different optical channels are different, and the maximum angle of the included angle between the directions of the main rays of the light beams emitted from different optical channels is 110-130 degrees. In the display device provided by the disclosure, image lights emitted by different sub-display areas of an image source are transmitted to the coupling lens through different optical channels, and the directions of main rays of light beams emitted from different optical channels are different, so that the light of the image lights emitted by each sub-display area can be adjusted and optimized by independently adjusting parameters of different optical channels, so that the problems of distortion, vignetting, non-uniform field of view, non-uniform color and the like generated in the light transmission process are eliminated as much as possible, and the imaging quality of the display device is improved. The optical array and the coupling lens included in the display device have simple structures, are easy to process and contribute to reducing the cost. In addition, the maximum angle of the included angle between the directions of the main rays of the light beams emitted from different optical channels is 110-130 degrees, and the use efficiency of the image light is improved under the condition that the field range of near-eye display can be met.

A display device and a display method provided in the embodiments of the present disclosure are described below with reference to the drawings.

Fig. 1 is a schematic partial structure diagram of a display device according to an embodiment of the present disclosure, and fig. 2 is a schematic plan structure diagram of a sub-display region arranged in a matrix as shown in fig. 1. As shown in fig. 1 and 2, the display device includes an image source 100, an optical array 200, and a coupling lens 300. The image source 100 includes a plurality of sub-display regions 110, for example, the plurality of sub-display regions 110 included in the image source 100 may be arranged in an array. The optical array 200 is located at the light exit side of the image source 100 and includes a plurality of optical structures 210 arranged in an array. For example, as shown in fig. 2, the plurality of sub display regions 110 are arranged in an array along a first direction and a second direction, the first direction and the second direction intersecting. Of course, the plurality of optical structures are also arranged in an array along the first direction and the second direction. For example, as shown in fig. 2, the first direction may be a Y direction, the second direction may be a Z direction, and the first direction and the second direction may be interchanged. Fig. 2 schematically shows that the first direction and the second direction are perpendicular, but is not limited thereto.

As shown in fig. 1, the coupling lens 300 is located on a side of the optical array 200 away from the image source 100, for example, image light emitted from the image source 100 enters the coupling lens 300 after passing through the optical array 200.

As shown in fig. 1, the plurality of sub-display regions 110 and the plurality of optical structures 210 are in one-to-one correspondence, that is, the image source 100 includes the same number of sub-display regions 110 as the optical structures 210 included in the optical array 200, and one sub-display region 110 corresponds to one optical structure 210. The image light emitted from each sub display region 110 is configured to be incident on the coupling lens 300 through the corresponding optical structure 210, for example, the image light emitted from different sub display regions 110 is incident on the coupling lens 300 after passing through different optical structures 210.

As shown in fig. 1, each optical structure 210 forms an optical channel, the image light emitted from each sub-display area 110 is configured to exit from the corresponding optical channel, the directions of the principal rays of the light beams exiting from different optical channels are different, and the maximum angle of the included angle between the directions of the principal rays of the light beams exiting from different optical channels is 110 ° to 130 °. For example, the maximum angle of the included angle between the directions of the chief rays of the outgoing light beams from the different optical channels may be 120 °. For example, the included angle between the directions of the principal rays of the outgoing light beams from the different optical channels may range from 1 ° to 130 °.

For example, the maximum angle of the included angle between the directions of the principal rays of the light beams exiting from the different optical channels may be the angle of field of the display device.

For example, the directions of the principal rays of the light beams incident on the incident surface of the optical array 200 by the plurality of sub display regions 110 are the same.

For example, light emitted from each sub-display region travels in the corresponding optical channel, while little light travels between adjacent optical channels.

In the display device provided by the disclosure, image lights emitted by different sub-display areas of an image source are transmitted to the coupling lens through different optical channels, and the directions of main rays of light beams emitted from different optical channels are different, so that the light of the image lights emitted by each sub-display area can be adjusted and optimized by independently adjusting parameters of different optical channels, so that the problems of distortion, vignetting, non-uniform field of view, non-uniform color and the like generated in the light transmission process are eliminated as much as possible, and the imaging quality of the display device is improved. The optical array and the coupling lens included in the display device have simple structures, are easy to process and contribute to reducing the cost.

For example, the image source 100 may be an organic light emitting diode display source. Embodiments of the present disclosure are not so limited and the image source may be any other suitable type of display source, such as an LCD image display source, for example.

For example, the image source 100 includes a plurality of sub-display regions 110 that may be a plurality of different partial fields of view that divide the display region of the image source 100. Each sub-display area 110 forms a local field of view. For example, the different sub-display regions 110 are connected to each other to form a display region of the entire image source 100.

In the embodiment of the present disclosure, since different local fields of view (i.e., different sub-display regions) are distributed at different positions of the display region, the relative positional relationship of the different sub-display regions and the optical element (including the optical array and the coupling lens) is also different. In the embodiment of the disclosure, different optical channels (i.e., optical arrays) are configured to transmit light of different local fields of view, and the light of each local field of view can be adjusted by setting the optical channels with different parameters, so that the light of different local fields of view can achieve a better transmission state.

For example, the maximum dimension of the different sub-display areas 110 in a direction parallel to the display area (e.g., display surface) of the image source 100 may be 1/2 of the display area of the image source 100. That is, the size of the sub display area 110 is 1/2 of the size of the display area of the image source 100 in a direction parallel to the display area. For example, the display area may be rectangular in shape, and the size of two adjacent sides of the sub-display area is half the size of the corresponding two adjacent sides of the display area of the image source, respectively. At this time, the sub display regions may be arranged in a 2 × 2 array. Of course, the disclosed embodiments are not limited thereto, and the size of the sub-display area may be smaller to form more sub-display areas in the image source.

For example, as shown in fig. 1, the image light emitted from each sub-display region 110 is configured to exit only from the corresponding optical channel. For example, the image light emitted from each sub-display region 110 is configured to exit only the corresponding optical structure 210 to the coupling lens 300. For example, the image light emitted from each sub-display region 110 does not exit from the optical structure 210 other than the optical structure 210 corresponding to the sub-display region 110.

For example, as shown in fig. 1, the sub-display regions 110 overlap the corresponding optical structures 210 in a direction perpendicular to the display surface of the image source 100, such that substantially all of the light emitted from the sub-display regions is incident into the corresponding optical channel.

For example, as shown in fig. 1, the distance between adjacent sub display regions 110 may be set to be large enough so that image light exiting from one sub display region 110 can be incident only in the corresponding optical channel and cannot be incident in other adjacent optical channels. In the display device provided by the disclosure, by reasonably setting the distance between adjacent sub-display areas and the distance between the sub-display areas and the optical array, when a light beam (such as a light cone) emitted by each sub-display area irradiates an incident surface of the optical array, the light beam only irradiates the corresponding optical channel, and does not irradiate other optical channels.

For example, in a direction parallel to the display surface, such as the Y direction shown in fig. 1, the plurality of optical structures 210 has a dimension a, the distance between the sub-display area 110 and the optical array 200 is B, and the divergence angle θ of the light beams emitted from the sub-display area 110 is not greater than 2arctan (a/2B), so that the image light emitted from each sub-display area exits only from the corresponding optical channel.

For example, fig. 3 is a partial structural schematic diagram of a display device provided according to an example of the embodiment of the present disclosure. As shown in fig. 3, a barrier 410 is disposed between adjacent optical structures 210 so that the image light emitted from each sub-display region 110 is emitted only from the corresponding optical channel.

For example, most of the image light emitted from the sub display region 110 may be directly incident into the corresponding optical structure 210, and a very small portion is blocked by the blocking portion 410 to prevent incidence into other optical structures 210.

For example, the material of the barrier 410 may be a light absorbing material to absorb light incident thereon.

For example, the material of the barrier 410 may be a light-reflecting material such as metal, so that light incident on the barrier 410 may be reflected into the corresponding optical structure 210 to improve light emergence rate.

For example, fig. 4 is a partial structural schematic diagram of a display device provided according to another example of the embodiment of the present disclosure. As shown in fig. 4, a barrier 410' is disposed between adjacent sub-display regions 110 to allow image light emitted from each sub-display region 110 to exit only from the corresponding optical channel.

For example, as shown in fig. 4, the blocking portion 410' disposed between the adjacent sub display regions 110 may be a convex structure to limit the propagation direction of the light emitted from the sub display regions 110.

For example, as shown in fig. 4, the material of the barrier 410' may be a light absorbing material to absorb light incident thereon.

For example, the material of the barrier 410 'may be a light-reflecting material such as metal, so that light incident on the barrier 410' may be reflected into the corresponding optical structure 210 to improve light emergence rate.

Of course, in the display device provided by the present disclosure, blocking portions may also be disposed between adjacent sub-display regions and between adjacent optical structures, and the materials of the two blocking portions may be the same or different, which is not limited in this disclosure.

For example, fig. 5 is a partial structural schematic diagram of a display device provided according to another example of the embodiment of the present disclosure. As shown in fig. 5, a waveguide channel 420 is disposed between at least one sub-display region 110 and the corresponding optical channel so that the image light emitted from at least one sub-display region 110 exits only the corresponding optical channel. For example, a waveguide 420 is disposed between each sub-display region 110 and the corresponding optical structure 210, so that the image light emitted from each sub-display region 110 is emitted only from the corresponding optical structure 210.

For example, as shown in fig. 5, the light incident from the sub-display region 110 to the waveguide channel 420 may be totally reflected in the waveguide channel 420 and exit at a side surface thereof facing the optical structure 210, so that the image light emitted from the sub-display region exits only from the corresponding optical channel.

For example, as shown in FIG. 5, the sub-display region 110, the waveguide channels 420, and the optical structure 210 overlap in a direction perpendicular to the display surface.

For example, as shown in FIG. 5, the distance between the waveguide channel 420 and the optical structure 210 is no greater than the distance between the waveguide channel 420 and the sub-display region 110.

Due to the different positions of the different sub-display areas with respect to the coupling lens (e.g. also including the optical waveguide element described later), or the different colors of the image light emitted by the different sub-display areas, there may be deviations between the image light emitted by the different sub-display areas in one or both of the coupling lens and the optical waveguide element, for example, where the deviations include, but are not limited to, any one or more of spherical aberration, chromatic aberration, and coma aberration. If a common optical channel is used to transmit the image light emitted from different sub-display regions, the image light emitted from at least some of the different sub-display regions cannot be well modulated, eventually degrading the image quality. In the embodiment of the disclosure, the light emitted from different sub-display regions is transmitted through different optical channels, and the parameters of different optical channels are configured according to the conditions of different sub-display regions, so that the optical array can compensate the relative deviation generated in the process that the light emitted from different sub-display regions propagates in at least one of the coupling lens and the optical waveguide element. In the embodiment of the disclosure, the larger the number of the sub-display regions, the more the optical channels are, the smaller the area of the sub-display region corresponding to each optical channel is, and the smaller the generated aberration and vignetting are.

For example, fig. 6 is a partial structural schematic diagram of a display device provided according to another example of the embodiment of the present disclosure. As shown in fig. 6, each sub-display region 110 includes a plurality of sub-pixels 111, and the directions of the principal rays of the image light emitted by different sub-pixels 111 in each sub-display region 110 through the corresponding optical channels are different. For example, the directions of the principal rays of the image light emitted by the different sub-pixels 111 in each sub-display region 110 through the corresponding optical structures 210 are different. The sub-pixels 111 can be the smallest units that can be independently controlled and can display a certain color, and for example, can be red sub-pixels, green sub-pixels, blue sub-pixels, or any other suitable color sub-pixels.

For example, as shown in fig. 6, each of the different sub display regions 110 may be a region composed of a plurality of sub pixels 111. For example, each sub-display area 110 may be shaped in a square, rectangle, pentagon, hexagon, or other polygon, or any other suitable shape. For example, the plurality of sub display regions 110 may be densely arranged to form a continuous entire display region to display the entire image. For example, the sub-display regions described above are merely a division of the display region, so that different sub-display regions can correspond to different optical channels, and no physical spacing or boundaries may be necessary between adjacent sub-display regions.

For example, as shown in fig. 6, the plurality of sub-pixels 111 in each sub-display region 110 may include at least one color sub-pixel, for example, at least one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

For example, the sub display region 110 may be a display unit capable of displaying different colors and brightness. For example, each display unit includes a plurality of sub-pixels 111 of different colors, and by adjusting the light emission luminance of the sub-pixels 111 of different colors, each display unit can be made to display light of different colors and different luminances, so that the entire display area displays a color picture. For example, each display unit may include red, green, and blue sub-pixels, and light of different colors and different brightness may be displayed by mixing light emitted from the different color sub-pixels.

For example, as shown in fig. 6, along the arrangement direction of the plurality of sub-pixels 111, the distance between adjacent sub-pixels 111 in each sub-display region 110 is a first distance D1, the distance between two sub-pixels 111 respectively located in adjacent sub-display regions 110 and adjacent to each other is a second distance D2, and the first distance D1 is smaller than the second distance D2.

For example, the image source may include a plurality of sub-pixels arranged in at least one of the first and second directions, and the plurality of sub-pixels in each sub-display region may be arranged in at least one of the first and second directions. Fig. 6 schematically shows that the first distance and the second distance are distances of adjacent sub-pixels along the first direction, but the first distance and the second distance may also be distances of adjacent sub-pixels along the second direction. For example, the first distance D1 and the second distance D2 shown in fig. 6 refer to a distance between edges of the adjacent sub-pixels 111 close to each other, but are not limited thereto, and the distance may also be a distance between geometric centers of the sub-pixels.

For example, fig. 6 schematically shows that each sub display region 110 includes two sub pixels 111 arranged in the Y direction, but is not limited thereto, and each sub display region may further include three or more sub pixels arranged in the Y direction.

In the display device provided by the present disclosure, the distances between the sub-pixels respectively located in the adjacent sub-display regions and adjacent to each other are set to be larger, so that it is possible to ensure that the image light emitted from each sub-display region is emitted only from the corresponding optical structure.

For example, as shown in fig. 6, the second distance D2 is greater than the third distance D3 between adjacent optical structures 210, so as to ensure that the image light emitted from each sub-display region exits only the corresponding optical structure.

The embodiment of the present disclosure is not limited thereto, each sub-display region 110 may also include only one sub-pixel 111, and each sub-display region 110 may be regarded as a region where each sub-pixel 111 is located.

For example, each sub-display region 110 includes one sub-pixel, and the distance between adjacent sub-pixels 111 is greater than the distance between adjacent optical structures 210.

The present disclosure provides a display device in which each sub-pixel (e.g., a different color sub-pixel) uses a different optical channel, which can better eliminate chromatic aberration with a large field of view, relative to a display device in which different color sub-pixels share one optical channel. In addition, each sub-pixel corresponds to one optical channel, so that the optical vignetting effect and the optical distortion effect can be eliminated.

For example, fig. 1 and 6 schematically illustrate each optical channel as a collimating optical channel configured to collimate image light incident to the optical channel. For example, each optical structure 210 may collimate image light from the image source 100, in which case the coupling lens 300 is configured such that collimated light incident to the coupling lens 300 remains collimated light after passing through the coupling lens 300.

The disclosed embodiments are not limited thereto, and the optical channels may also be non-collimated optical channels, in which case the coupling lens 300 is a collimating coupling lens and is configured to collimate the light focused from each optical structure 210 to the coupling lens 300.

For example, the plurality of optical structures may cooperate with the coupling lens, so that light beams emitted from different local fields of view (i.e., different sub-display regions) on an image source are focused by the corresponding optical channels to the optimal collimating and imaging positions of the coupling lens with respect to the channel light beams, and then collimated by the coupling lens and emitted from the coupling lens to form a series of parallel lights in different directions.

For example, fig. 7 is a partial structural schematic diagram of a display device provided according to an example of the embodiment of the present disclosure. As shown in fig. 7, the optical array 200 includes at least two layers of optical array structures 201. For example, the optical array 200 includes a multilayer optical array structure 201, and each layer of the optical array structure 201 includes a surface structure having an optical refraction function and at least one of a spherical surface, an aspherical surface, a free-form surface, and a flat surface.

The optical array and the coupling lens provided by the embodiment of the disclosure can be used for processing a plurality of products at one time by stacking different structures on a large-size wafer layer by utilizing a Wafer Level Optical (WLO) processing process. The optical array and the coupling lens provided by the embodiment of the disclosure have simple structures, are suitable for semiconductor wafer-level optical processing, and have high production efficiency and low production cost.

For example, as shown in fig. 7, the multilayer optical array structure 201 includes a micro-curved array 2011 and a micro-planar array 2012 arranged in a stack, the micro-curved array 2011 being located on a side of the micro-planar array 2012 facing the image source 100. Each optical structure 210 includes a micro-curved surface 211 and a micro-plane 212, that is, the micro-curved surface array 2011 includes a plurality of micro-curved surfaces 211, the micro-plane array 2012 includes a plurality of micro-planes 212, and the plurality of micro-curved surfaces 211 and the plurality of micro-planes 212 are the same in number and are arranged in a one-to-one correspondence.

For example, as shown in FIG. 7, each optical structure 210 may include a micro-curved surface 211 and a micro-flat surface 212.

For example, as shown in fig. 7, each optical structure 210 may include a micro-curved surface 211 that is one optical curved surface of a micro-lens, and each optical structure 210 may include a micro-flat surface 212 that is one optical flat surface of a micro-prism. For example, fig. 7 schematically illustrates that the micro-plane 212 may be an optical plane of a side of the micro-prism facing the image source 100, but is not limited thereto, and may be an optical plane of a side of the micro-prism facing away from the image source 100.

For example, as shown in fig. 7, the slant angles of the micro-planes 212 in at least some of the optical structures 210 are different, and/or the curvatures of the micro-curved surfaces 211 in at least some of the optical structures 210 are different, so that the optical parameters of at least some of the optical structures can be adjusted for the corresponding sub-display regions to eliminate a series of problems such as distortion, vignetting, non-uniform field of view, non-uniform color, etc. generated during the propagation of the light emitted from the sub-display regions.

The tilt angle of the micro-planes may refer to an angle of each micro-plane with respect to a display surface of an image source. For example, the inclination angle of the plurality of micro-planes 212 arranged in a direction in which the edge of the optical array 200 points to the center, which is parallel to the display surface of the image source, is gradually decreased.

For example, the light emitted from the sub-display area 110 may be deflected after passing through the inclined micro-plane 212, and parameters of different micro-planes may be simulated in a large amount by setting the angle of the light emitted from the coupling lens 300 as a target angle (for example, optical simulation software such as lighttools, tracpro, fred, and the like may be used, and the light propagation path and angle are simulated through 3D modeling, and the design parameters meeting the requirements are determined through a parameter scanning method), so as to obtain parameters of the micro-plane satisfying the target angle. The parameters of the micro-plane may include an inclination angle of the micro-plane, an area of the micro-plane, and the like. In the embodiment of the disclosure, by adjusting parameters of at least part of the micro-planes, the propagation direction of the light rays passing through the optical array in the sub-display area can be changed so that the light rays emitted after passing through the coupling lens meet the target angle. The target angle may refer to a viewing angle after the sub-display area passes through the optical array and the coupling lens.

For example, as shown in FIG. 7, the curvatures of the micro-curvatures 211 in at least some of the optical structures 210 are different. For example, by adjusting the curvature, surface shape, refractive index, and other parameters of the micro-curved surface 211 in at least a part of the optical structure 210 to adjust the parameters of at least a part of the optical channels, a series of problems of distortion, vignetting, non-uniform field of view, non-uniform color, and the like generated during the propagation of the light emitted from the sub-display region can be eliminated.

For example, the larger the distance between the sub-display region 110 and the micro-curved surface 211 is, the larger the curvature radius of the micro-curved surface 211 is, so as to ensure that the image light emitted from the sub-display region 110 is only incident into the corresponding micro-curved surface 211. For example, the radius of curvature of the micro-curved surface 211 is in a direct proportional relationship with the distance between the sub-display area 110 and the micro-curved surface 211.

For example, as shown in fig. 7, the micro-curved surface array 2011 includes a plurality of micro-curved surface structures, each micro-curved surface structure includes one micro-curved surface (i.e., a micro-curved surface is one surface of a micro-curved surface structure), and a micro-curved surface connection structure may be disposed between two adjacent micro-curved surface structures, so that the micro-curved surface array may be formed as an integrated structure.

For example, if the optical array includes a multilayer optical array structure, and each optical structure includes a multilayer structure, embodiments of the present disclosure can also adjust the imaging quality of each optical channel by individually adjusting the distance between the multilayer structures in each optical structure. For example, the distance between the different layer structures can be adjusted by adjusting parameters such as the curvature of the micro-curved surface or the tilt angle of the micro-plane.

In the display device provided in the embodiments of the present disclosure, by disposing the optical array including the plurality of optical channels between the image source and the coupling lens, the structure of the optical system of the display device may be more compact and thinner, so that the volume and weight of the final product may be reduced.

For example, as shown in fig. 7, the micro-planar array 2012 includes a plurality of micro-planar structures 2021 arranged in an array along a first direction and a second direction, and each micro-planar structure 2021 includes a micro-plane 212, i.e., the micro-plane 212 is a surface of the micro-planar structure 2121. Adjacent micro-planar structures 2121 are connected by a connecting portion 2120, and a cross-section of micro-planar array 2012 taken perpendicular to a plane of the first or second direction includes a serrated edge on a side where micro-plane 212 is located. For example, the cross-section of the micro-planar array 2012 shown in fig. 7 that faces the image source 100 has a sawtooth shape on the side where the micro-planes 212 are located.

For example, adjacent micro-planes 212 are connected by a connection 2120 such that micro-plane array 2012 can be formed as a unitary structure.

For example, as shown in fig. 7, the surfaces of two adjacent micro-planes 212 and the connection part 2120 between the two micro-planes 212 constitute a concave structure. For example, the micro-plane 212 protrudes toward the image source 100 side with respect to the surface of the connecting portion 2120.

For example, fig. 8 is a partial structural schematic diagram of a display device provided according to another example of the embodiment of the present disclosure. As shown in fig. 8, the optical array 200 may include three layers of optical array structures 201, for example, a first micro-curved array 2011, a second micro-curved array 2013 and a micro-planar array 2012 which are stacked, the first micro-curved array 2011 and the second micro-curved array 2013 are both located on a side of the micro-planar array 2012 facing the image source 100, and each optical structure 210 includes a second micro-curved surface 213, a first micro-curved surface 211 and a micro-planar surface 212 which are stacked in sequence. That is, the first micro-curved surface array 2011 includes a plurality of first micro-curved surfaces 211, the micro-planar array 2012 includes a plurality of micro-planar surfaces 212, the second micro-curved surface array 2013 includes a plurality of second micro-curved surfaces 213, and the plurality of first micro-curved surfaces 211, the plurality of second micro-curved surfaces 213, and the plurality of micro-planar surfaces 212 are the same in number and are arranged in a one-to-one correspondence.

For example, as shown in fig. 8, the first micro-curved surface array 2011 includes a first micro-curved surface 211 that is curved toward the side close to the micro-planar array 2012, and the second micro-curved surface array 2013 includes a second micro-curved surface 213 that is curved away from the micro-planar array 2012, that is, the curved direction of the first micro-curved surface 211 is opposite to the curved direction of the second micro-curved surface 213.

For example, as shown in fig. 8, the inclined angles of the micro-planes 212 in at least some of the optical structures 210 are different, and/or the curvatures of the first micro-curved surfaces 211 in at least some of the optical structures 210 are different, and/or the curvatures of the second micro-curved surfaces 213 in at least some of the optical structures 210 are different, so that the optical parameters of at least some of the optical structures can be adjusted for the corresponding sub-display regions to eliminate a series of problems such as distortion, vignetting, non-uniformity of the field of view, non-uniformity of color, and the like, generated during the propagation of the light rays emitted from the sub-display regions.

For example, as shown in fig. 8, the optical parameters of the micro-plane 212 may include the tilt angle of the micro-plane, the area of the micro-plane, and the like. For example, as shown in fig. 8, the optical parameters of the first and second

micro-curved surfaces

211 and 213 may include curvature, surface type, refractive index, and the like. By adjusting the optical parameters of the micro-plane or the micro-curved surface in each optical structure, a series of problems of distortion, vignetting, non-uniform field of view, non-uniform color and the like generated in the transmission process of light rays emitted by the sub-display area can be eliminated.

For example, as shown in fig. 8, the first micro-curved array 2011 and the second micro-curved array 2013 may be formed as an integral structure to facilitate fabrication. However, the first and second micro-curved surface arrays may be independent structures.

For example, as shown in fig. 8, in each micro-curved surface array, a micro-curved surface connection structure may be disposed between two adjacent micro-curved surface structures, so that each micro-curved surface array may be formed as an integrated structure.

For example, as shown in fig. 8, in the micro-planar array, adjacent micro-planar structures may be connected by a connecting portion, and a surface of the connecting portion and the plurality of micro-planes 212 constitute a serrated surface. For example, adjacent micro-planes are connected by a connecting portion so that the micro-plane array may be formed as a unitary structure.

For example, the imaging quality of each optical channel can be adjusted by adjusting the distance between the multiple layers in each optical structure individually. For example, the distance between the different layer structures can be adjusted by adjusting parameters such as the curvature of the micro-curved surface or the tilt angle of the micro-plane.

Fig. 9 is a schematic partial structure diagram of a display device according to an embodiment of the present disclosure. As shown in fig. 9, the display device further includes an optical waveguide element 500 positioned on the light exit side of the coupling lens 300, and the light emitted from the coupling lens 300 enters the optical waveguide element 500, is reflected multiple times in the optical waveguide element 500, and then exits from the optical waveguide element 500.

For example, as shown in fig. 9, the optical waveguide element 500 comprises a light incoupling structure 510 and at least one light outcoupling structure 520. For example, as shown in fig. 9, the light incoupling structure 510 may include a coupling-in surface, light emitted from the coupling lens 300 is incident to the light incoupling structure 510, and the light incident to the light incoupling structure 510 is totally internally reflected at the coupling-in surface and propagates to the light outcoupling structure 520 by total reflection in the optical waveguide element 500.

For example, as shown in fig. 9, the light out-coupling structure 520 may be a transflective element, for example, the optical waveguide element 500 may include a plurality of transflective elements, a portion of the light transmitted to each transflective element is reflected by the transflective element out of the light-emitting surface of the optical waveguide element 500, and another portion of the light transmitted to each transflective element is transmitted through the transflective element and then continuously transmitted in the optical waveguide element 500.

For example, light exiting the optical waveguide element 500 may be directed to a user 530.

For example, the optical waveguide element 500 may be an array optical waveguide, but is not limited thereto, and may also be other types of waveguide structures, such as a diffractive optical waveguide, and the like.

For example, the display device provided by the embodiment of the present disclosure may be a near-eye display device. For example, the near-field display device provided by the embodiments of the present disclosure may be a head-mounted display or other augmented reality or virtual reality display device. The near-eye display device may comprise, for example, a mixed reality head-mounted display, such as microsoft's HoloLens.

For example, fig. 10 is a schematic partial structure diagram of a display device according to an embodiment of the present disclosure. As shown in fig. 10, the display device further includes a control device 600 connected to the image source 100 and configured to control the light emitting intensity of the sub-pixels 111 included in the sub-display area 110 according to the corresponding relationship between the image passing through the coupling lens 300 and the field angle of the main light of the sub-display area 110 passing through the coupling lens 300.

The embodiment of the present disclosure provides a display method of the display device, where the display method includes: acquiring an image to be displayed, wherein the image to be displayed is an image passing through a coupling lens, the image to be displayed comprises a plurality of sub-image areas, and the plurality of sub-image areas correspond to the plurality of sub-display areas one to one; determining the relative coordinate position relation between the sub-image area of the image to be displayed and the sub-display area of the corresponding image source according to the field angle of the main ray of the sub-display area passing through the coupling lens; and controlling the luminous intensity of the sub-pixels included in the sub-display area according to the relative coordinate position relation.

For example, when the exit pupil of the coupling lens 300 coincides with the entrance pupil of the optical waveguide element 500, the angle of view of the light passing through the coupling lens 300 may be the angle of incidence of the light entering the light entrance surface of the optical waveguide element 500.

For example, in the process of designing the optical array and the coupling lens, the field angle of the chief ray of the sub-display region after passing through the optical array and the coupling lens can be determined accordingly, i.e. the target angle is set above.

For example, the control device 600 may be configured to acquire the image to be displayed and the corresponding relationship between the viewing angle and the image to be displayed, so as to control the light emission intensity of the sub-pixels 111 included in the sub-display area 110.

For example, the obtaining of the correspondence between the field angle of the chief ray of the sub-display region passing through the coupling lens and the image to be displayed includes: and determining the relative coordinate position relationship between the image to be displayed and the image source display image according to the field angle.

For example, fig. 11 is a basic image array formed by a plurality of sub-display regions in an image source, and fig. 12 is an image array to be displayed in an image to be displayed formed after passing through a coupling lens. As shown in fig. 10 to 12, the plurality of sub-display regions 110 in the image source 100 are configured to display a basic image array, the image light displayed by the basic image array forms an image array to be displayed after being adjusted by the optical array 200 and the coupling lens 300, the image array to be displayed includes a plurality of sub-image regions 110 ' arranged in an array, the number of the plurality of sub-display regions 110 is the same as the number of the plurality of sub-image regions 110 ', and the plurality of sub-display regions 110 and the plurality of sub-image regions 110 ' are arranged in a one-to-one correspondence. The sub-image area refers to an area where image light emitted from the sub-display area forms an image after passing through the corresponding optical structure and the coupling lens.

For example, the base image array may display an image that is different from the image displayed by the image array to be displayed.

For example, as shown in fig. 10 to 12, a plurality of sub display regions 110 are arranged in a matrix such that each sub display region 110 has two-dimensional coordinates. For example, the sub-display regions 110 have coordinates (1,1) to (m, n) when arranged in an m × n array. For example, the image to be displayed includes a plurality of sub-image areas 110 ', and the plurality of sub-image areas 110 ' are arranged along a matrix such that each sub-image area 110 ' has two-dimensional coordinates. For example, when the sub-image regions 110 ' are arranged in an m ' × n ' array, they have coordinates (1 ', 1 ') to (m ', n '). For example, the two-dimensional coordinate position of at least one of the plurality of sub-display areas 110 is different from the two-dimensional coordinate position of the corresponding sub-image area 110'. The above m and n are positive integers greater than 1, and the above m 'and n' are positive integers greater than 1.

For example, when each sub-display area 110 has one pixel, the two-dimensional coordinates of each sub-display area 110 are the two-dimensional coordinates of the pixel. For example, when each sub-display region 110 has a plurality of pixels, each sub-pixel in each sub-display region 110 has its own two-dimensional coordinate, and for example, when the plurality of sub-pixels in each sub-display region 110 are arranged in a l × k array, the two-dimensional coordinates of each sub-pixel in the sub-display region 110 having the two-dimensional coordinates (1,1) may be (11,11) to (1l,1k), and the two-dimensional coordinates of each sub-pixel in the sub-display region 110 having the two-dimensional coordinates (m, n) may be (m1, n1) to (ml, nk). The above l and k are positive integers greater than 0.

The plurality of sub-display areas 110 are arranged in a planar matrix parallel to the YZ plane such that each sub-display area 110 has a corresponding two-dimensional coordinate, and similarly, the plurality of sub-image areas 110 'are also arranged in a planar matrix parallel to the YZ plane such that each sub-image area 110' has a corresponding two-dimensional coordinate. The above-mentioned "two-dimensional coordinate position" refers to a relative position of two-dimensional coordinates of one sub-display area (or sub-image area) in a plurality of sub-display areas (or sub-image areas) arranged in a matrix.

For example, if the two-dimensional coordinate position of the sub-display region with two-dimensional coordinates (a, b) in the m × n array of the plurality of sub-display regions 110 is the same as the two-dimensional coordinate position of the sub-image region with two-dimensional coordinates (a ', b') in the m '× n' array of the plurality of sub-image regions 110 ', the phrase "the two-dimensional coordinate position of at least one of the plurality of sub-display regions 110 is different from the two-dimensional coordinate position of the corresponding sub-image region 110' may mean that the two-dimensional coordinate of the sub-image region corresponding to the sub-display region with two-dimensional coordinates (a, b) is not (a ', b'). A is a positive integer of 1 to m inclusive, and b is a positive integer of 1 to n inclusive.

For example, the above-mentioned relative coordinate position relationship between the image to be displayed and the image source display image may refer to a corresponding relationship between a two-dimensional coordinate position of one sub-image region in the image array to be displayed and a two-dimensional coordinate position of a corresponding sub-display region in the basic image array. For example, as shown in fig. 11 and 12, the sub-image area 110 ' with the two-dimensional coordinate position (3 ', 2 ') in the image array to be displayed may be formed by the light rays of the sub-display area 110 with the two-dimensional coordinate position (2,3) in the basic image array after passing through the optical array and the coupling lens.

For example, controlling the light emission intensity of the sub-pixels included in the sub-display area according to the correspondence includes: and controlling the luminous intensity of the sub-pixels included in the sub-display area according to the relative coordinate position relation.

For example, the control device 600 may control the light emitting intensity of the pixel in the corresponding sub-display region according to the correspondence between the two-dimensional coordinate position of the sub-display region in the basic image array and the two-dimensional coordinate position of the sub-image region in the image array to be displayed.

For example, fig. 13 is a block diagram of the control device. As shown in fig. 13, the control device 600 may include a processor 610 and a memory 620. Memory 620 includes one or more computer program modules 630. One or more computer program modules 630 are stored in the memory 620 and configured to be executed by the processor 610, the one or more computer program modules comprising instructions for performing the above-described display method.

For example, the control device 600 obtains information of the image to be displayed and a corresponding relationship between the angle of view of the chief ray of the sub display region passing through the coupling lens and the image to be displayed, and stores the information in the memory 620. For example, the processor 610 may execute a computer program module that controls the luminous intensity of the sub-pixels comprised by the sub-display area.

For example, the memory 620 and the processor 610 may be interconnected by a bus system and/or other form of connection mechanism (not shown).

For example, the processor 610 may be a Central Processing Unit (CPU), a Digital Signal Processor (DSP), or other form of processing unit having data processing capabilities and/or program execution capabilities, such as a Field Programmable Gate Array (FPGA), or the like; for example, the Central Processing Unit (CPU) may be an X86 or ARM architecture or the like. The processor 610 may be a general purpose processor or a special purpose processor.

For example, memory 620 may include any combination of one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. Volatile memory can include, for example, Random Access Memory (RAM), cache memory (or the like). The non-volatile memory may include, for example, Read Only Memory (ROM), a hard disk, an Erasable Programmable Read Only Memory (EPROM), a portable compact disc read only memory (CD-ROM), USB memory, flash memory, and the like. One or more computer program modules 630 may be stored on the computer-readable storage medium, and the processor 610 may execute the one or more computer program modules 630 to implement various functions of the control apparatus 600. Various applications and various data, as well as various data used and/or generated by the applications, and the like, may also be stored in the computer-readable storage medium.

The following points need to be explained:

(1) in the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to general designs.

(2) Features of the same embodiment of the disclosure and of different embodiments may be combined with each other without conflict.

The above description is intended to be exemplary of the present disclosure, and not to limit the scope of the present disclosure, which is defined by the claims appended hereto.

Claims

1. A display device, comprising:

an image source including a plurality of sub-display regions arranged in an array along a first direction and a second direction;

the optical array is positioned on the light emergent side of the image source and comprises a plurality of optical structures which are arrayed along the first direction and the second direction; and

a coupling lens located on a side of the optical array remote from the image source,

wherein the plurality of sub-display regions and the plurality of optical structures are in one-to-one correspondence, and the image light emitted from each sub-display region is configured to be incident on the coupling lens through the corresponding optical structure;

each optical structure forms an optical channel, the image light emitted by each sub-display area is configured to be emitted from the corresponding optical channel, the directions of the main light rays of the light beams emitted from different optical channels are different, and the maximum angle of the included angle between the directions of the main light rays of the light beams emitted from different optical channels is 110-130 degrees.

2. The display device according to claim 1, wherein the image light emitted from each sub-display region is configured to exit only from the corresponding optical channel.

3. The display device of claim 2, wherein the sub-display areas overlap the corresponding optical structures in a direction perpendicular to a display surface of the image source;

at least one of between adjacent sub-display regions and between adjacent optical structures is provided with a blocking portion so that image light emitted from each sub-display region exits only from the corresponding optical channel.

4. The display device of claim 2, wherein the sub-display regions overlap the corresponding optical structures in a direction perpendicular to a display surface of the image source, and a waveguide channel is disposed between at least one sub-display region and the corresponding optical channel such that image light emitted from the at least one sub-display region exits only the corresponding optical channel.

5. The display device according to claim 2, wherein each sub-display region includes one sub-pixel; or

Each sub-display area comprises a plurality of sub-pixels, and the directions of the main rays of the image light emitted by different sub-pixels in each sub-display area and emitted through the corresponding optical channels are different.

6. The display device according to claim 5, wherein each of the sub-display regions includes a plurality of sub-pixels, and a distance between adjacent sub-pixels in each of the sub-display regions along an arrangement direction of the plurality of sub-pixels is a first distance, and a distance between two sub-pixels respectively located in the adjacent sub-display regions and adjacent to each other is a second distance, and the first distance is smaller than the second distance.

7. The display device of claim 2, wherein each optical channel is a collimating optical channel configured to collimate image light incident to the optical channel.

8. The display device of claim 2, wherein the coupling lens is a collimating coupling lens and is configured to collimate light focused from each optical structure to the coupling lens.

9. The display device of claim 2, wherein the optical array comprises a multilayer optical array structure, each layer of optical array structure comprising a face structure having an optical refractive function and at least one of a spherical surface, an aspherical surface, a free-form surface, and a flat surface.

10. The display device of claim 9, wherein the optical array comprises a stack of a micro-curved array and a micro-planar array, the micro-curved array being located on a side of the micro-planar array facing the image source, each of the optical structures comprising a micro-curved surface and a micro-planar surface;

the micro-planes in at least some of the optical structures have different angles of inclination and/or the micro-curved surfaces in at least some of the optical structures have different curvatures.

11. The display device according to claim 10, wherein the micro-planar array includes a plurality of micro-planar structures arrayed in the first direction and the second direction, each micro-planar structure includes one micro-plane, adjacent micro-planar structures are connected by a connection portion, and a cross section of the micro-planar array taken perpendicular to a plane of the first direction or the second direction includes a serrated edge on a side where the micro-plane is located.

12. The display device according to any one of claims 1 to 11, further comprising:

an optical waveguide element located on a light exit side of the coupling lens,

wherein the light emitted from the coupling lens enters the optical waveguide element, and is emitted from the optical waveguide element after being reflected a plurality of times in the optical waveguide element.

13. The display device according to any one of claims 1 to 11, further comprising:

and the control device is connected with the image source and is configured to control the luminous intensity of the sub-pixels included in the sub-display area according to the corresponding relation between the image passing through the coupling lens and the field angle of the main ray of the sub-display area passing through the coupling lens.

14. The display device of claim 13, wherein the control device comprises a processor and a memory, the memory including one or more computer program modules stored in the memory and configured to be executed by the processor, the one or more computer program modules including instructions for executing the image source to display an image.

15. The display device of any one of claims 1-11, wherein the display device is a near-eye display device.

16. A display method according to any one of claims 1 to 15, comprising:

acquiring an image to be displayed, wherein the image to be displayed is an image passing through the coupling lens, the image to be displayed comprises a plurality of sub-image areas, and the plurality of sub-image areas correspond to the plurality of sub-display areas one to one;

determining the relative coordinate position relation between the sub-image area of the image to be displayed and the corresponding sub-display area of the image source according to the field angle of the main ray of the sub-display area passing through the coupling lens; and

and controlling the luminous intensity of the sub-pixels included in the sub-display area according to the relative coordinate position relation.

17. The display method of claim 16, wherein the plurality of sub-display regions are arranged in a matrix such that each sub-display region has two-dimensional coordinates, the plurality of sub-image regions are arranged in a matrix such that each sub-image region has two-dimensional coordinates, and a two-dimensional coordinate position of at least one of the plurality of sub-display regions is different from a corresponding sub-image region two-dimensional coordinate position.