Display device and display method

Abstract

Embodiments of the present disclosure provide a display device and a display method. The display device comprises an image source, an optical array and a coupling lens. The image source comprises a plurality of sub-display regions; the optical array is located on the light-out side of the image source and comprises a plurality of array-arranged optical structures; and the coupling lens is located on the 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 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, and the image light emitted from each sub-display region is configured to be emitted from the corresponding optical channel. The directions of the chief rays of the light beams emitted from different optical channels are different, and the maximum angle between the directions of the chief rays of the light beams emitted from different optical channels is 110°-130°. Thus, by individually adjusting the parameters of different optical channels, the light rays emitted from each sub-display region can be adjusted and optimized.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to a display device and a display method. Background Technology

[0002] Augmented reality display technology and near-field display devices both require an optical system to magnify the image on a microdisplay screen and project the image onto the retina, thus magnifying the image on the screen and presenting it to the viewer's eye. The design of various precision optical components in the optical system has a significant impact on improving image quality, the size and weight of the final product, and other aspects. Summary of the Invention

[0003] At least one embodiment of this disclosure provides a display device and a display method. The display device provided by the embodiments of this disclosure can adjust and optimize the light emitted from each sub-display area by individually adjusting the parameters of different optical channels.

[0004] At least one embodiment of this disclosure provides a display device, including an image source, an optical array, and a coupling lens. The image source includes a plurality of sub-display areas arranged in an array along a first direction and a second direction; the optical array is located on the light-emitting side of the image source and includes a plurality of optical structures arranged in an array along the first direction and the second direction; the coupling lens is located on the side of the optical array away from the image source. The plurality of sub-display areas and the plurality of optical structures correspond one-to-one, and image light emitted from each sub-display area is configured to pass through the corresponding optical structure and enter the coupling lens; each optical structure forms an optical channel, and image light emitted from each sub-display area 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 between the directions of the principal rays of the light beams exiting from different optical channels is 110° to 130°.

[0005] For example, in embodiments of this disclosure, the image light emitted from each sub-display area is configured to exit only from the corresponding optical channel.

[0006] For example, in an embodiment of this disclosure, the sub-display area overlaps with the corresponding optical structure along a direction perpendicular to the display surface of the image source; at least one of the adjacent sub-display areas and the adjacent optical structures is provided with a blocking portion so that the image light emitted by each sub-display area exits only from the corresponding optical channel.

[0007] For example, in an embodiment of this disclosure, along a direction perpendicular to the display surface of the image source, the sub-display area overlaps with the corresponding optical structure, and a waveguide channel is provided between at least one sub-display area and the corresponding optical channel so that the image light emitted by the at least one sub-display area exits only from the corresponding optical channel.

[0008] For example, in embodiments of this disclosure, each sub-display area includes a sub-pixel; or each sub-display area includes multiple sub-pixels, and the direction of the main light emitted by the image light emitted by different sub-pixels in each sub-display area after passing through the corresponding optical channel is different.

[0009] For example, in an embodiment of this disclosure, each sub-display area includes multiple sub-pixels. Along the arrangement direction of the multiple sub-pixels, the distance between adjacent sub-pixels in each sub-display area is a first distance, and the distance between two sub-pixels located in adjacent sub-display areas and adjacent to each other is a second distance. The first distance is less than the second distance.

[0010] For example, in an embodiment of this disclosure, each optical channel is a collimating optical channel configured to collimate image light incident on the optical channel.

[0011] For example, in an embodiment of this disclosure, the coupling lens is a collimating coupling lens and is configured to collimate the light focused from each optical structure onto the coupling lens.

[0012] For example, in an embodiment of this disclosure, the optical array includes a multi-layer optical array structure, each layer of the optical array structure including at least one of a sphere, an aspherical surface, a freeform surface, and a plane, and having an optical refraction function.

[0013] For example, in an embodiment of this disclosure, the optical array includes a stacked array of micro-curved surfaces and a array of micro-planar surfaces, the micro-curved surface array being located on the side of the micro-planar surface array facing the image source, and each of the optical structures including micro-curved surfaces and micro-planar surfaces; at least some of the micro-planar surfaces in the optical structures have different tilt angles, and / or, at least some of the micro-curved surfaces in the optical structures have different curvatures.

[0014] For example, in an embodiment of this disclosure, the microplane array includes a plurality of microplane structures arranged in an array along the first direction and the second direction, each microplane structure including one microplane, adjacent microplane structures being connected by a connecting portion, and the cross section of the microplane array taken by a plane perpendicular to the first direction or the second direction includes a serrated edge on the side where the microplane is located.

[0015] For example, in embodiments of this disclosure, the display device further includes an optical waveguide element located on the light-emitting side of the coupling lens. Light emitted from the coupling lens enters the optical waveguide element and, after undergoing multiple reflections within the optical waveguide element, exits from the optical waveguide element.

[0016] For example, in an embodiment of this disclosure, the display device further includes: a control device connected to the image source and configured to control the luminous intensity of the sub-pixels included in the sub-display area based on the correspondence between the image after passing through the coupling lens and the field of view angle of the main ray of the sub-display area after passing through the coupling lens.

[0017] For example, in an embodiment of this disclosure, the control device includes 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.

[0018] For example, in an embodiment of this disclosure, the display device is a near-eye display device.

[0019] At least one embodiment of this disclosure provides a display method applicable to any of the above-described display devices, comprising: acquiring an image to be displayed, the image to be displayed being an image after passing through the coupling lens, the image to be displayed including a plurality of sub-image regions, the plurality of sub-image regions corresponding one-to-one with the plurality of sub-display regions; determining the relative coordinate position relationship between the sub-image regions of the image to be displayed and the corresponding sub-display regions of the image source based on the field of view angle of the principal ray of the sub-display regions passing through the coupling lens; and controlling the luminous intensity of the sub-pixels included in the sub-display regions based on the relative coordinate position relationship.

[0020] For example, in embodiments of this disclosure, the plurality of sub-display regions are arranged along a matrix such that each sub-display region has a two-dimensional coordinate position, the plurality of sub-image regions are arranged along a matrix such that each sub-image region has a two-dimensional coordinate position, and at least one of the plurality of sub-display regions has a two-dimensional coordinate position that is different from the two-dimensional coordinate position of the corresponding sub-image region. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0022] Figure 1 This is a partial structural schematic diagram of a display device provided according to an embodiment of the present disclosure;

[0023] Figure 2 for Figure 1 A schematic diagram of the planar structure of the sub-display areas arranged in a matrix;

[0024] Figure 3This is a partial structural schematic diagram of a display device provided according to an example of an embodiment of the present disclosure;

[0025] Figure 4 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure;

[0026] Figure 5 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure;

[0027] Figure 6 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure;

[0028] Figure 7 This is a partial structural schematic diagram of a display device provided according to an example of an embodiment of the present disclosure;

[0029] Figure 8 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure;

[0030] Figure 9 This is a partial structural schematic diagram of a display device provided according to an embodiment of the present disclosure;

[0031] Figure 10 This is a partial structural schematic diagram of a display device provided according to an embodiment of the present disclosure;

[0032] Figure 11 A basic image array formed by multiple sub-display regions in an image source;

[0033] Figure 12 An array of images to be displayed in the image to be displayed formed after passing through a coupling lens; and

[0034] Figure 13 This is a block diagram of the control device. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0036] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0037] Currently, products utilizing near-eye display technology have garnered widespread attention. Virtual reality glasses and augmented reality glasses based on waveguide technology, with their compact structure, have become the most promising head-mounted displays. In head-mounted display technology, especially when a large field of view is required, some optical modules used to collimate the image displayed from the image source to infinity are complex and bulky, leading to difficult manufacturing, high costs, and cumbersome equipment. While some lightweight optical module designs employ prisms and other optical structures to form deflecting optical paths, reducing the space occupied by the optical module, its weight is not significantly reduced. Furthermore, the assembly of optical modules from prisms, flat panels, and lenses still requires highly complex manufacturing methods, resulting in low production efficiency and high costs.

[0038] During the research, the inventors of this application discovered that simplifying the optical module used for displaying collimated imaging image sources in near-eye display products has become an urgent problem to be solved.

[0039] Embodiments of this disclosure provide a display device and a display method. The display device includes an image source, an optical array, and a coupling lens. The image source includes a plurality of sub-display areas arranged in an array along a first direction and a second direction; the optical array is located on the light-emitting side of the image source and includes a plurality of optical structures arranged in an array along the first direction and the second direction; the coupling lens is located on the side of the optical array away from the image source. The plurality of sub-display areas and the plurality of optical structures correspond one-to-one, and image light emitted from each sub-display area is configured to pass through the corresponding optical structure and enter the coupling lens. Each optical structure forms an optical channel, and image light emitted from each sub-display area is configured to exit from the corresponding optical channel. The directions of the principal rays of the beams exiting from different optical channels are different, and the maximum angle between the directions of the principal rays of the beams exiting from different optical channels is 110° to 130°. In the display device provided in this disclosure, image light emitted from different sub-display areas of the image source is transmitted to the coupling lens through different optical channels. The directions of the principal rays emanating from the beams from different optical channels are different. Therefore, by individually adjusting the parameters of different optical channels, the image light emitted from each sub-display area can be adjusted and optimized to minimize problems such as distortion, vignetting, uneven field of view, and color inhomogeneity during light propagation, thereby improving the imaging quality of the display device. The optical array and coupling lens included in the display device have a simple structure and are easy to manufacture, which helps to reduce costs. Furthermore, the maximum angle between the directions of the principal rays emanating from the beams from different optical channels is 110° to 130°, which improves the efficiency of image light utilization while meeting the field of view requirements for near-eye displays.

[0040] The display device and display method provided in the embodiments of this disclosure are described below with reference to the accompanying drawings.

[0041] Figure 1 This is a partial structural schematic diagram of a display device according to an embodiment of the present disclosure. Figure 2 for Figure 1 The diagram shows a planar structure of the sub-display areas arranged in a matrix. (See attached diagram.) Figure 1 and Figure 2 As shown, the display device includes an image source 100, an optical array 200, and a coupling lens 300. The image source 100 includes multiple sub-display areas 110, which can be arranged in an array. The optical array 200 is located on the light-emitting side of the image source 100 and includes multiple optical structures 210 arranged in an array. For example, such as... Figure 2 As shown, multiple sub-display areas 110 are arranged in an array along a first direction and a second direction, where the first and second directions intersect. Similarly, multiple optical structures are also arranged in an array along the first and second directions. For example, as... Figure 2As shown, the first direction can be the Y direction, and the second direction can be the Z direction. The first and second directions can be interchanged. Figure 2 The first and second directions are shown schematically to be perpendicular, but are not limited thereto.

[0042] like Figure 1 As shown, the coupling lens 300 is located on the side of the optical array 200 away from the image source 100. For example, the image light emitted from the image source 100 passes through the optical array 200 and then enters the coupling lens 300.

[0043] like Figure 1 As shown, multiple sub-display areas 110 correspond one-to-one with multiple optical structures 210, meaning the number of sub-display areas 110 included in the image source 100 is the same as the number of optical structures 210 included in the optical array 200, and one sub-display area 110 corresponds to one optical structure 210. Image light emitted from each sub-display area 110 is configured to pass through the corresponding optical structure 210 and then enter the coupling lens 300. For example, image light emitted from different sub-display areas 110 passes through different optical structures 210 before entering the coupling lens 300.

[0044] like Figure 1 As shown, each optical structure 210 forms an optical channel, and 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 beams exiting from different optical channels are different, and the maximum angle between the directions of the principal rays of the beams exiting from different optical channels is 110° to 130°. For example, the maximum angle between the directions of the principal rays of the beams exiting from different optical channels can be 120°. For example, the range of the angle between the directions of the principal rays of the beams exiting from different optical channels can be 1° to 130°.

[0045] For example, the maximum angle between the directions of the principal rays of beams emitted from different optical channels can be the field of view of the display device.

[0046] For example, the main rays of the light beams incident on the incident surface of the optical array 200 from multiple sub-display areas 110 have the same direction.

[0047] For example, light emitted from each sub-display area propagates in its corresponding optical channel, while almost no light propagates between adjacent optical channels.

[0048] In the display device provided in this disclosure, image light emitted from different sub-display areas of the image source is transmitted to the coupling lens through different optical channels. The direction of the principal rays of the beams exiting from different optical channels is different. Therefore, by adjusting the parameters of different optical channels individually, the light emitted from each sub-display area can be adjusted and optimized to minimize problems such as distortion, vignetting, field-of-view non-uniformity, and color non-uniformity during light propagation, thereby improving the imaging quality of the display device. The optical array and coupling lens included in the display device have a simple structure, are easy to manufacture, and help reduce costs.

[0049] For example, image source 100 can be an organic light-emitting diode (OLED) display source. This disclosure is not limited to this; the image source can also be any other suitable type of display source, such as an LCD image display source.

[0050] For example, the multiple sub-display areas 110 included in the image source 100 can be multiple different local fields of view formed by dividing the display area of ​​the image source 100. Each sub-display area 110 forms a local field of view. For example, different sub-display areas 110 are connected to each other to form the entire display area of ​​the image source 100.

[0051] In the embodiments of this disclosure, since different local fields of view (i.e., different sub-display areas) are distributed at different locations in the display area, the relative positional relationship between the different sub-display areas and the optical elements (including the elements of the optical array and the coupling lens) is also different. In the embodiments of this disclosure, different optical channels (i.e., optical arrays) are configured to transmit light from different local fields of view. By setting optical channels with different parameters, the light from each local field of view can be adjusted, thereby enabling the light from different local fields of view to achieve a better transmission state.

[0052] For example, the maximum size of the aforementioned different sub-display areas 110 in the direction parallel to the display area (e.g., display surface) of the image source 100 can be half the size of the display area of ​​the image source 100. That is, in the direction parallel to the display area, the size of the sub-display area 110 is half the size of the display area of ​​the image source 100. For example, the shape of the display area can be rectangular, and the size of each adjacent side of the sub-display area is half the size of the corresponding adjacent sides of the display area of ​​the image source. In this case, the sub-display areas can be arranged in a 2×2 array. Of course, the embodiments of this disclosure are not limited to this; the size of the sub-display areas can be smaller to form more sub-display areas in the image source.

[0053] For example, such as Figure 1As shown, the image light emitted from each sub-display area 110 is configured to exit only from the corresponding optical channel. For example, the image light emitted from each sub-display area 110 is configured to exit only from the corresponding optical structure 210 to the coupling lens 300. For example, the image light emitted from each sub-display area 110 will not exit from any other optical structure 210 besides the optical structure 210 corresponding to that sub-display area 110.

[0054] For example, such as Figure 1 As shown, along the direction perpendicular to the display surface of the image source 100, the sub-display area 110 overlaps with the corresponding optical structure 210, so that almost all the light emitted from the sub-display area is incident into the corresponding optical channel.

[0055] For example, such as Figure 1 As shown, the distance between adjacent sub-display areas 110 can be set large enough that image light emitted from one sub-display area 110 can only enter the corresponding optical channel and cannot enter other adjacent optical channels. In the display device provided in this disclosure, by reasonably setting the distance between adjacent sub-display areas and the distance between the sub-display area and the optical array, when the light beam (e.g., a light cone) emitted from each sub-display area illuminates the incident surface of the optical array, the light beam only enters the corresponding optical channel and does not enter other optical channels.

[0056] For example, along a direction parallel to the display surface, for example Figure 1 In the Y direction shown, the size of the multiple optical structures 210 is A, the distance between the sub-display area 110 and the optical array 200 is B, and the divergence angle θ of the light beam emitted by the sub-display area 110 is not greater than 2arctan(A / 2B), so that the image light emitted by each sub-display area only exits from the corresponding optical channel.

[0057] For example, Figure 3 This is a partial structural schematic diagram of a display device provided according to an example embodiment of the present disclosure. For example... Figure 3 As shown, a blocking part 410 is provided between adjacent optical structures 210 so that the image light emitted by each sub-display area 110 is emitted only from the corresponding optical channel.

[0058] For example, most of the image light emitted from the sub-display area 110 can be directly incident into the corresponding optical structure 210, while a very small portion is blocked by the blocking part 410 to prevent it from incidenting into other optical structures 210.

[0059] For example, the material of the blocking part 410 can be a light-absorbing material to absorb the light incident on it.

[0060] For example, the material of the blocking part 410 can be a reflective material such as metal, so that the light incident on the blocking part 410 can be reflected into the corresponding optical structure 210, thereby improving the light emission rate.

[0061] For example, Figure 4 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure. For example... Figure 4 As shown, a blocking part 410' is provided between adjacent sub-display areas 110 so that the image light emitted by each sub-display area 110 is emitted only from the corresponding optical channel.

[0062] For example, such as Figure 4 As shown, the blocking portion 410' provided between adjacent sub-display areas 110 can be a protruding structure to limit the propagation direction of light emitted from the sub-display area 110.

[0063] For example, such as Figure 4 As shown, the material of the blocking part 410' can be a light-absorbing material to absorb the light incident on it.

[0064] For example, the material of the blocking part 410' can be a reflective material such as metal, so that the light incident on the blocking part 410' can be reflected into the corresponding optical structure 210, thereby improving the light emissivity.

[0065] Of course, in the display device provided by this disclosure, blocking parts can also be provided between adjacent sub-display areas and between adjacent optical structures. The materials of the two blocking parts can be the same or different, and the embodiments of this disclosure do not limit this.

[0066] For example, Figure 5 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure. For example... Figure 5 As shown, a waveguide channel 420 is provided between at least one sub-display area 110 and its corresponding optical channel so that image light emitted from at least one sub-display area 110 exits only from the corresponding optical channel. For example, a waveguide channel 420 is provided between each sub-display area 110 and its corresponding optical structure 210 so that image light emitted from each sub-display area 110 exits only from the corresponding optical structure 210.

[0067] For example, such as Figure 5 As shown, light rays incident from the sub-display area 110 onto the waveguide channel 420 can propagate through total internal reflection in the waveguide channel 420 and exit from its side surface facing the optical structure 210, so that the image light emitted from the sub-display area exits only from the corresponding optical channel.

[0068] For example, such as Figure 5As shown, the sub-display area 110, waveguide channel 420, and optical structure 210 overlap along the direction perpendicular to the display surface.

[0069] For example, such as Figure 5 As shown, 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 area 110.

[0070] Because different sub-display areas are positioned differently relative to the coupling lens (including, for example, the optical waveguide element described later), or because the image light emitted by different sub-display areas is of different colors, there will be deviations between the image light emitted by different sub-display areas in one or both of the coupling lens and the optical waveguide element. These deviations include, for example, any one or more of the optical aberrations such as spherical aberration, chromatic aberration, and coma. If a common optical channel is used to transmit the image light emitted by different sub-display areas, the image light emitted by at least some of the different sub-display areas cannot be well modulated, ultimately leading to a degraded image quality. In embodiments of this disclosure, the light emitted by different sub-display areas is transmitted through different optical channels, and the parameters of the different optical channels are configured according to the different sub-display areas, thereby enabling the optical array to compensate for the relative deviations that occur during the propagation of light emitted by different sub-display areas in at least one of the coupling lens and the optical waveguide element. In embodiments of this disclosure, the more sub-display areas there are, the more optical channels there are, and the smaller the area of ​​the sub-display area corresponding to each optical channel, the smaller the resulting aberrations and vignetting.

[0071] For example, Figure 6 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure. For example... Figure 6 As shown, each sub-display area 110 includes multiple sub-pixels 111. The image light emitted from different sub-pixels 111 in each sub-display area 110 exits through the corresponding optical channel in different directions. For example, the image light emitted from different sub-pixels 111 in each sub-display area 110 exits through the corresponding optical structure 210 in different directions. The aforementioned sub-pixels 111 can be the smallest unit that can be independently controlled and can display a certain color. For example, they can be red sub-pixels, green sub-pixels, blue sub-pixels, or sub-pixels of any other suitable color.

[0072] For example, such as Figure 6As shown, each sub-display area 110 in the different sub-display areas 110 can be a region composed of multiple sub-pixels 111. For example, the shape of each sub-display area 110 can be a square, rectangle, pentagon, hexagon, or other polygon, or it can be any other suitable shape. For example, the above-mentioned multiple sub-display areas 110 can be densely arranged to form a continuous entire display area to display the entire image. For example, the above-mentioned sub-display areas are merely divisions of the display area, so that different sub-display areas can correspond to different optical channels, and it is not necessary to set physical intervals or boundaries between adjacent sub-display areas.

[0073] For example, such as Figure 6 As shown, the plurality of sub-pixels 111 in each sub-display area 110 may include at least one color sub-pixel, such as at least one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

[0074] For example, the sub-display area 110 can be a display unit capable of displaying different colors and brightness. For instance, each display unit includes multiple sub-pixels 111 of different colors. By adjusting the luminous brightness of the different colored sub-pixels 111, each display unit can display light of different colors and brightness, thus enabling the entire display area to display a color image. For example, each display unit may include red, green, and blue sub-pixels, and different colors and brightness of light are displayed by mixing the light emitted by the different colored sub-pixels.

[0075] For example, such as Figure 6 As shown, along the arrangement direction of the multiple sub-pixels 111, the distance between adjacent sub-pixels 111 in each sub-display area 110 is the first distance D1, and the distance between two sub-pixels 111 that are located in adjacent sub-display areas 110 and are adjacent to each other is the second distance D2. The first distance D1 is less than the second distance D2.

[0076] For example, if the multiple sub-pixels included in the image source can be arranged along at least one of the first direction and the second direction, then the multiple sub-pixels in each sub-display area can be arranged along at least one of the first direction and the second direction. Figure 6 The illustration shows that the first and second distances are the distances between adjacent sub-pixels along a first direction, but it is not limited to this; the first and second distances can also be the distances between adjacent sub-pixels along a second direction. For example, Figure 6 The first distance D1 and the second distance D2 shown refer to the distance between the edges of adjacent sub-pixels 111 that are close to each other, but are not limited to this. The above distances can also be the distance between the geometric centers of the sub-pixels.

[0077] For example, Figure 6The illustration shows that each sub-display area 110 includes two sub-pixels 111 arranged along the Y direction, but is not limited thereto; each sub-display area may also include three or more sub-pixels arranged along the Y direction.

[0078] In the display device provided in this disclosure, the distance between sub-pixels located in adjacent sub-display areas and adjacent to each other is set to be relatively large, which can ensure as much as possible that the image light emitted from each sub-display area is emitted only from the corresponding optical structure.

[0079] For example, such as Figure 6 As shown, the second distance D2 is greater than the third distance D3 between adjacent optical structures 210, which can ensure that the image light emitted by each sub-display area only exits from the corresponding optical structure.

[0080] The embodiments disclosed herein are not limited thereto. Each sub-display area 110 may also include only one sub-pixel 111. In this case, each sub-display area 110 can be regarded as the area where each sub-pixel 111 is located.

[0081] For example, each sub-display area 110 includes a sub-pixel, and the distance between adjacent sub-pixels 111 is greater than the distance between adjacent optical structures 210.

[0082] This disclosure provides a display device in which each sub-pixel (e.g., sub-pixels of different colors) uses a different optical channel. Compared to display devices where different color sub-pixels share a single optical channel, this display device can better eliminate color difference in a large field of view. Furthermore, having one optical channel for each sub-pixel can eliminate optical vignetting and optical distortion effects.

[0083] For example, Figure 1 and Figure 6 The optical channels are schematically shown as collimating optical channels, which are configured to collimate the image light incident on the optical channels. For example, each optical structure 210 can collimate the image light from the image source 100. In this case, the coupling lens 300 is configured such that the collimated light incident on the coupling lens 300 remains parallel collimated light after passing through the coupling lens 300.

[0084] This disclosure is not limited to the embodiments described herein. The optical channel may also be a non-collimated optical channel. In this case, the coupling lens 300 is a collimating coupling lens and is configured to collimate the light focused from each optical structure 210 onto the coupling lens 300.

[0085] For example, multiple optical structures can be used in conjunction with a coupling lens so that light beams emitted from different local fields of view (i.e. different sub-display areas) on the image source are focused by their corresponding optical channels to the optimal collimation imaging position of the coupling lens relative to the light beam of that channel. After being collimated by the coupling lens, the light beams are emitted from the coupling lens to form a series of parallel lights in different directions.

[0086] For example, Figure 7 This is a partial structural schematic diagram of a display device provided according to an example embodiment of the present disclosure. For example... Figure 7 As shown, the optical array 200 includes at least two layers of optical array structures 201. For example, the optical array 200 includes multiple layers of optical array structures 201, each layer of optical array structure 201 including at least one of a spherical surface, an aspherical surface, a freeform surface, and a plane, and having an optical refraction function.

[0087] The optical array and coupling lens provided in this disclosure can utilize wafer-level optics (WLO) processing technology to stack different structures layer by layer on a large-size wafer, processing multiple products at once. The optical array and coupling lens provided in this disclosure have a simple structure, are suitable for semiconductor wafer-level optics processing, and offer high production efficiency and low production cost.

[0088] For example, such as Figure 7 As shown, the multilayer optical array structure 201 includes a stacked micro-curved surface array 2011 and a micro-planar array 2012, with the micro-curved surface array 2011 located on the 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-planar surface 212, that is, the micro-curved surface array 2011 includes multiple micro-curved surfaces 211, and the micro-planar array 2012 includes multiple micro-planar surfaces 212, and the number of multiple micro-curved surfaces 211 and multiple micro-planar surfaces 212 are the same and they are arranged in a one-to-one correspondence.

[0089] For example, such as Figure 7 As shown, each optical structure 210 may include a micro-curved surface 211 and a micro-plane 212.

[0090] For example, such as Figure 7 As shown, the micro-surfaces 211 included in each optical structure 210 can be optical surfaces of a microlens, and the micro-planes 212 included in each optical structure 210 can be optical planes of a microprism. For example, Figure 7 The microplane 212 is schematically shown to be an optical plane on the side of the microprism facing the image source 100, but it is not limited thereto and can also be an optical plane on the side of the microprism away from the image source 100.

[0091] For example, such as Figure 7As shown, the tilt angles of the micro-planes 212 in at least a portion of the optical structure 210 are different, and / or the curvatures of the micro-surfaces 211 in at least a portion of the optical structure 210 are different, thereby allowing the optical parameters of at least a portion of the optical structure to be adjusted for the corresponding sub-display area to eliminate a series of problems such as distortion, vignetting, uneven field of view, and uneven color caused by the light emitted from the sub-display area during propagation.

[0092] The tilt angle of the aforementioned microplanes can refer to the angle of each microplane relative to the display surface of the image source. For example, the tilt angle of multiple microplanes 212 arranged along the edge of the optical array 200 in a direction pointing towards the center (this direction is parallel to the display surface of the image source) gradually decreases.

[0093] For example, light rays emitted from the sub-display area 110 will be deflected after passing through the tilted microplane 212. The target angle can be set by simulating the parameters of different microplanes extensively (e.g., using optical simulation software such as LightTools, TracPro, and Fred, through 3D modeling, simulating the light propagation path and angle, and determining the required design parameters through parameter scanning methods). This yields the parameters of the microplane that satisfy the target angle. The parameters of the microplane may include its tilt angle and area. In this embodiment, by adjusting the parameters of at least some of the microplanes, the propagation direction of light rays from the sub-display area after passing through the optical array can be changed so that the light rays emitted after passing through the coupling lens satisfy the target angle. The target angle can refer to the field of view of the sub-display area after passing through the optical array and the coupling lens.

[0094] For example, such as Figure 7 As shown, the curvature of the micro-surfaces 211 in at least a portion of the optical structure 210 is different. For example, the parameters of at least a portion of the optical channels can be specifically adjusted by adjusting the curvature, surface shape, refractive index, and other parameters of the micro-surfaces 211 in at least a portion of the optical structure 210, which helps to eliminate a series of problems such as distortion, vignetting, field of view non-uniformity, and color non-uniformity of light emitted from the sub-display area during propagation.

[0095] For example, the greater the distance between the sub-display area 110 and the micro-surface 211, the larger the radius of curvature of the micro-surface 211, so as to ensure that the image light emitted from the sub-display area 110 only enters the corresponding micro-surface 211. For example, the radius of curvature of the micro-surface 211 is directly proportional to the distance between the sub-display area 110 and the micro-surface 211.

[0096] For example, such as Figure 7As shown, the micro-surface array 2011 includes multiple micro-surface structures, each of which includes a micro-surface (i.e., the micro-surface is a surface of the micro-surface structure). Micro-surface connection structures can be set between two adjacent micro-surface structures so that the micro-surface array can be formed into an integral structure.

[0097] For example, if an optical array includes a multi-layer optical array structure, then each optical structure includes multiple layers. In embodiments of this disclosure, the imaging quality of each optical channel can be adjusted by individually adjusting the distance between the multiple layers within each optical structure. For instance, the distance between different layers can be adjusted by adjusting parameters such as the curvature of the micro-surface or the tilt angle of the micro-plane.

[0098] In the display device provided in this embodiment, by setting an optical array including multiple optical channels between the image source and the coupling lens, the structure of the optical system of the display device can be made more compact and thinner, thereby reducing the size and weight of the final product.

[0099] For example, such as Figure 7 As shown, the microplanar array 2012 includes a plurality of microplanar structures 2021 arranged in an array along a first direction and a second direction. Each microplanar structure 2021 includes a microplanar surface 212, i.e., the microplanar surface 212 is a surface of the microplanar structure 2121. Adjacent microplanar structures 2121 are connected by a connecting portion 2120, and the cross-section of the microplanar array 2012 taken by a plane perpendicular to the first or second direction includes a serrated edge on the side where the microplanar surface 212 is located. For example, Figure 7 In the cross-section of the microplane array 2012 shown, the side facing the image source 100 is the side where the microplane 212 is located, and the shape of this side is serrated.

[0100] For example, adjacent microplanes 212 are connected by a connecting part 2120 so that the microplane array 2012 can be formed into a single structure.

[0101] For example, such as Figure 7 As shown, the surfaces of two adjacent microplanes 212 and the connecting portion 2120 located between these two microplanes 212 constitute a recessed structure. For example, the microplanes 212 protrude toward the image source 100 relative to the surface of the connecting portion 2120.

[0102] For example, Figure 8 This is a partial structural schematic diagram of a display device provided according to another example of an embodiment of the present disclosure. For example... Figure 8As shown, the optical array 200 may include a three-layer optical array structure 201, for example, including a first micro-curved surface array 2011, a second micro-curved surface array 2013, and a micro-planar array 2012 stacked together. The first micro-curved surface array 2011 and the second micro-curved surface array 2013 are both located on the 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 stacked sequentially. That is, the first micro-curved surface array 2011 includes multiple first micro-curved surfaces 211, the micro-planar array 2012 includes multiple micro-planar surfaces 212, and the second micro-curved surface array 2013 includes multiple second micro-curved surfaces 213, and the number of multiple first micro-curved surfaces 211, multiple second micro-curved surfaces 213, and multiple micro-planar surfaces 212 are the same and are arranged in a one-to-one correspondence.

[0103] For example, such as Figure 8 As shown, the first micro-curved surface array 2011 includes a first micro-curved surface 211 that bends toward the side closer to the micro-planar array 2012, and the second micro-curved surface array 2013 includes a second micro-curved surface 213 that bends toward the side away from the micro-planar array 2012, that is, the bending direction of the first micro-curved surface 211 and the bending direction of the second micro-curved surface 213 are opposite.

[0104] For example, such as Figure 8 As shown, the tilt angles of the micro-planes 212 in at least a portion of the optical structure 210 are different, and / or the curvatures of the first micro-surfaces 211 in at least a portion of the optical structure 210 are different, and / or the curvatures of the second micro-surfaces 213 in at least a portion of the optical structure 210 are different. This allows the optical parameters of at least a portion of the optical structure to be adjusted for the corresponding sub-display area to eliminate a series of problems such as distortion, vignetting, uneven field of view, and uneven color caused by the light emitted from the sub-display area during propagation.

[0105] For example, such as Figure 8 As shown, the optical parameters of the microplane 212 may include the tilt angle of the microplane, the area of ​​the microplane, etc. For example, as Figure 8 As shown, the optical parameters of the first micro-surface 211 and the second micro-surface 213 may include parameters such as curvature, surface shape, and refractive index. By adjusting the optical parameters of the micro-planes or micro-surfaces in each optical structure, it is beneficial to eliminate a series of problems such as distortion, vignetting, field of view non-uniformity, and color non-uniformity caused by the light emitted from the sub-display area during propagation.

[0106] For example, such as Figure 8 As shown, the first micro-curved surface array 2011 and the second micro-curved surface array 2013 can be formed into a single structure for ease of fabrication. However, this is not a limitation; the first micro-curved surface array and the second micro-curved surface array can also be independent structures.

[0107] For example, such as Figure 8 As shown, in each micro-surface array, a micro-surface connection structure can be set between two adjacent micro-surface structures so that each micro-surface array can be formed into an integrated structure.

[0108] For example, such as Figure 8 As shown, in the microplane array, adjacent microplane structures can be connected by connecting parts, and the surface of the connecting parts and the multiple microplanes 212 constitute a serrated surface. For example, adjacent microplanes can be connected by connecting parts so that the microplane array can be formed into a single structure.

[0109] For example, adjusting the distance between multiple layers within each optical structure can regulate the imaging quality of each optical channel. For instance, the distance between different layers can be adjusted by modifying parameters such as the curvature of the micro-surface or the tilt angle of the micro-plane.

[0110] Figure 9 This is a partial structural schematic diagram of a display device provided according to an embodiment of the present disclosure. Figure 9 As shown, the display device also includes an optical waveguide element 500 located on the light-emitting side of the coupling lens 300. Light emitted from the coupling lens 300 enters the optical waveguide element 500 and, after multiple reflections within the optical waveguide element 500, exits from the optical waveguide element 500.

[0111] For example, such as Figure 9 As shown, the optical waveguide element 500 includes an optical input structure 510 and at least one optical output structure 520. For example, as Figure 9 As shown, the optical coupling structure 510 may include a coupling input surface. Light rays emitted from the coupling lens 300 are incident on the optical coupling structure 510. The light rays incident on the optical coupling structure 510 undergo total internal reflection at the coupling input surface and then propagate through the optical waveguide element 500 to the optical coupling output structure 520.

[0112] For example, such as Figure 9 As shown, the optical coupling structure 520 can be a transparent reflective element. For example, the optical waveguide element 500 can include multiple transparent reflective elements. A portion of the light propagating to each transparent reflective element is reflected out of the light-emitting surface of the optical waveguide element 500 by the transparent reflective element, and another portion of the light propagating to each transparent reflective element continues to propagate in the optical waveguide element 500 after passing through the transparent reflective element.

[0113] For example, light rays emitted from the optical waveguide element 500 can be directed toward the user 530.

[0114] For example, the optical waveguide element 500 can be an arrayed optical waveguide, but it is not limited to this. It can also be other types of waveguide structures, such as diffractive optical waveguides.

[0115] For example, the display device provided in this disclosure embodiment can be a near-eye display device. For example, the near-field display device provided in this disclosure embodiment can be a head-mounted display or other augmented reality or virtual reality display device. The aforementioned near-eye display device may, for example, include a mixed reality head-mounted display, such as Microsoft's HoloLens.

[0116] For example, Figure 10 This is a partial structural schematic diagram of a display device provided according to an embodiment of the present disclosure. Figure 10 As shown, the display device also includes a control device 600, which is connected to the image source 100 and is configured to control the luminous intensity of the sub-pixels 111 included in the sub-display area 110 according to the correspondence between the image after passing through the coupling lens 300 and the field of view angle of the main ray of the sub-display area 110 after passing through the coupling lens 300.

[0117] This disclosure provides a display method for the above-described display device. The display method includes: acquiring an image to be displayed, the image to be displayed being an image after passing through a coupling lens, the image to be displayed including a plurality of sub-image regions, the plurality of sub-image regions corresponding one-to-one with a plurality of sub-display regions; determining the relative coordinate position relationship between the sub-image regions of the image to be displayed and the corresponding sub-display regions of the image source based on the field of view angle of the principal rays of the sub-display regions after passing through the coupling lens; and controlling the luminous intensity of the sub-pixels included in the sub-display regions based on the relative coordinate position relationship.

[0118] For example, when the exit pupil of the coupling lens 300 coincides with the entrance pupil of the optical waveguide element 500, the field of view of the light rays passing through the coupling lens 300 can be the incident angle of the light rays incident on the incident surface of the optical waveguide element 500.

[0119] For example, during the design of the optical array and coupling lens, the field of view of the main ray after the sub-display area passes through the optical array and coupling lens can be determined accordingly, which is the aforementioned target angle.

[0120] For example, the control device 600 may be configured to acquire the image to be displayed and the correspondence between the field of view and the image to be displayed, thereby controlling the luminous intensity of the sub-pixels 111 included in the sub-display area 110.

[0121] For example, the above-mentioned correspondence between the field of view of the main ray of the sub-display area through the coupling lens and the image to be displayed includes: determining the relative coordinate position relationship between the image to be displayed and the image displayed by the image source based on the field of view.

[0122] For example, Figure 11 A basic image array formed by multiple sub-display areas in an image source. Figure 12 This refers to the array of images to be displayed within the image to be displayed, formed after passing through a coupling lens. For example... Figures 10 to 12As shown, multiple sub-display areas 110 in the image source 100 are configured to display a basic image array. The image light displayed by the basic image array is adjusted by the optical array 200 and the coupling lens 300 to form an image array to be displayed. The image array to be displayed includes multiple sub-image areas 110' arranged in an array. The number of multiple sub-display areas 110 is the same as the number of multiple sub-image areas 110', and the multiple sub-display areas 110 and multiple sub-image areas 110' are set in a one-to-one correspondence. Here, a sub-image area refers to the area where the image light emitted from the sub-display area forms an image after passing through the corresponding optical structure and coupling lens.

[0123] For example, the image displayed by the basic image array may be different from the image displayed by the image array to be displayed.

[0124] For example, such as Figures 10 to 12 As shown, multiple sub-display areas 110 are arranged along a matrix such that each sub-display area 110 has two-dimensional coordinates. For example, when the sub-display areas 110 are arranged in an m*n array, they have coordinates (1,1) to (m,n). For example, the image to be displayed includes multiple sub-image areas 110', which are arranged along a matrix such that each sub-image area 110' has two-dimensional coordinates. For example, when the sub-image areas 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 multiple sub-display areas 110 is different from the two-dimensional coordinate position of the corresponding sub-image area 110'. m and n are positive integers greater than 1, and m' and n' are positive integers greater than 1.

[0125] 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 that pixel. For example, when each sub-display area 110 has multiple pixels, each sub-pixel in each sub-display area 110 has its own two-dimensional coordinates. For example, when the multiple sub-pixels in each sub-display area 110 are arranged in an l*k array, the two-dimensional coordinates of each sub-pixel in the sub-display area 110 with two-dimensional coordinates (1,1) can be (11,11) to (1l,1k), and the two-dimensional coordinates of each sub-pixel in the sub-display area 110 with two-dimensional coordinates (m,n) can be (m1,n1) to (ml,nk). l and k are positive integers greater than 0.

[0126] The aforementioned multiple sub-display areas 110 are arranged in a planar matrix parallel to the YZ plane so that each sub-display area 110 has corresponding two-dimensional coordinates. Similarly, the aforementioned multiple sub-image areas 110' are also arranged in a planar matrix parallel to the YZ plane so that each sub-image area 110' has corresponding two-dimensional coordinates. The aforementioned "two-dimensional coordinate position" refers to the relative position of the two-dimensional coordinates of a sub-display area (or sub-image area) within the matrix arrangement of multiple sub-display areas (or multiple sub-image areas).

[0127] For example, if the two-dimensional coordinates of a sub-display area 110 with coordinates (a, b) in an m*n array are the same as the two-dimensional coordinates of a sub-image area 110' with coordinates (a', b') in an m'*n' array, then the statement "at least one of the multiple sub-display areas 110 has a two-dimensional coordinate position different from the corresponding sub-image area 110'" can mean that the two-dimensional coordinates of the sub-image area corresponding to the sub-display area with coordinates (a, b) are not (a', b'). Here, 'a' is a positive integer greater than or equal to 1 and less than or equal to m, and 'b' is a positive integer greater than or equal to 1 and less than or equal to n.

[0128] For example, the relative coordinate position relationship between the image to be displayed and the image displayed by the image source can refer to the correspondence between the two-dimensional coordinate position of a sub-image region in the image array to be displayed and the two-dimensional coordinate position of the corresponding sub-display region in the basic image array. For example, as Figure 11 and Figure 12 As shown, the image displayed by the sub-image region 110' with two-dimensional coordinates (3',2') in the image array to be displayed can be formed by light rays from the sub-display region 110 with two-dimensional coordinates (2,3) in the basic image array after passing through an optical array and a coupling lens.

[0129] For example, controlling the luminous intensity of the sub-pixels included in the sub-display area according to the correspondence relationship includes: controlling the luminous intensity of the sub-pixels included in the sub-display area according to the relative coordinate position relationship.

[0130] For example, the control device 600 can control the luminous intensity of pixels in the corresponding sub-display area according to the correspondence between the two-dimensional coordinate positions of the sub-display areas in the basic image array and the two-dimensional coordinate positions of the sub-image areas in the image array to be displayed.

[0131] For example, Figure 13 This is a structural block diagram of the control device. (Example:) Figure 13As shown, the control device 600 may include a processor 610 and a memory 620. The memory 620 includes one or more computer program modules 630. The one or more computer program modules 630 are stored in the memory 620 and configured to be executed by the processor 610, and the one or more computer program modules include instructions for performing the above-described display method.

[0132] For example, after obtaining information about acquiring the image to be displayed and the correspondence between the field of view of the main ray of the sub-display area through the coupling lens and the image to be displayed, the control device 600 stores the above information in the memory 620. For example, the processor 610 can execute a computer program module that controls the luminous intensity of the sub-pixels included in the sub-display area.

[0133] For example, memory 620 and processor 610 can be interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0134] For example, processor 610 may be a central processing unit (CPU), a digital signal processor (DSP), or other processing unit with data processing and / or program execution capabilities, such as a field-programmable gate array (FPGA); for example, the central processing unit (CPU) may be an x86 or ARM architecture. Processor 610 may be a general-purpose processor or a special-purpose processor.

[0135] 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 may include, for example, random access memory (RAM) and / or cache memory. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, erasable programmable read-only memory (EPROM), portable compact disc read-only memory (CD-ROM), USB memory, flash memory, etc. One or more computer program modules 630 may be stored on the computer-readable storage medium, and processor 610 may run one or more computer program modules 630 to implement various functions of control device 600. Various application programs and various data, as well as various data used and / or generated by the application programs, may also be stored in the computer-readable storage medium.

[0136] The following points need to be explained:

[0137] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure, and other structures can be referred to the general design.

[0138] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure may be combined with each other.

[0139] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure, which is determined by the appended claims.

Claims

1. A display device comprising: an image source comprising a plurality of sub-display regions arranged in an array along a first direction and a second direction; an optical array located on an out-coupling side of the image source and comprising a plurality of optical structures arranged in an array along the first direction and the second direction, the optical array comprising a multi-layer optical array structure; and a coupling lens located on a side of the optical array distal to the image source, wherein the plurality of sub-display regions and the plurality of optical structures are in one-to-one correspondence, image light emitted from each sub-display region is configured to be incident on the coupling lens via a corresponding optical structure; the coupling lens is a collimating coupling lens and is configured to collimate light focused from each optical structure to the coupling lens; each optical structure forms an optical channel, image light emitted from each sub-display region is configured to exit from a corresponding optical channel, directions of chief rays of light beams exiting from different optical channels are different, and a maximum angle between the directions of the chief rays of the light beams exiting from the different optical channels is 110°-130°; the optical array comprises a micro-curved surface array and a micro-flat surface array arranged in layers, the micro-curved surface array is located on a side of the micro-flat surface array facing the image source, and each optical structure comprises a micro-curved surface and a micro-flat surface; the micro-flat surface array comprises a plurality of micro-flat surface structures arranged in an array along the first direction and the second direction, each micro-flat surface structure comprises a micro-flat surface, adjacent micro-flat surface structures are connected via a connecting portion, and a cross section of the micro-flat surface array taken by a plane perpendicular to the first direction or the second direction comprises a jagged edge on a side where the micro-flat surfaces are located; surfaces of two adjacent micro-flat surfaces and the connecting portion located between the two adjacent micro-flat surfaces form a concave structure. image light emitted from each sub-display region is configured to exit only from a corresponding optical channel.

2. The display device according to claim 1, wherein in a direction perpendicular to a display surface of the image source, the sub-display regions overlap with corresponding optical structures; 3. The display device of claim 2, wherein, at least one of between adjacent sub-display regions and between adjacent optical structures is provided with a blocking portion to cause image light emitted from each sub-display region to exit only from a corresponding optical channel. in a direction perpendicular to a display surface of the image source, the sub-display regions overlap with corresponding optical structures, and a waveguide channel is provided between at least one sub-display region and a corresponding optical channel to cause image light emitted from the at least one sub-display region to exit only from the corresponding optical channel.

4. The display device according to claim 2, wherein each sub-display region comprises one sub-pixel; or 5. The display device according to claim 2, wherein each sub-display region comprises a plurality of sub-pixels, and directions of chief rays of image light emitted from different sub-pixels in each sub-display region via corresponding optical channels are different. each sub-display region comprises 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, a distance between two sub-pixels respectively located in adjacent sub-display regions and adjacent to each other is a second distance, and the first distance is less than the second distance.

6. The display device of claim 5, wherein, each optical channel is a collimating optical channel configured to collimate image light incident on the optical channel.

7. The display device according to claim 2, wherein ​ 8. The display device according to claim 2, wherein Each optical array structure includes at least one of the following surface types: spherical, aspherical, freeform, and planar, and has optical refraction function.

9. The display device of claim 8, wherein, At least some of the microfacets in the optical structure have different tilt angles, and / or, The curvature of the micro-surfaces in at least some of the optical structures is different, and the greater the distance between the sub-display area and the micro-surface, the larger the radius of curvature of the micro-surface.

10. The display device according to claim 1, wherein The microplane is the optical plane of the microplane structure facing the image source.

11. The display device according to any one of claims 1-10, wherein, The micro-surface array includes multiple micro-surface structures, each micro-surface structure includes one micro-surface, and a micro-surface connection structure is provided between two adjacent micro-surface structures. On the display surface of the image source, the orthographic projection of the micro-curved surface lies within the orthographic projection of the micro-plane, and the orthographic projection of the micro-plane overlaps with the orthographic projection of the micro-curved surface connection structure.

12. The display device according to any one of claims 1-10, further comprising: An optical waveguide element is located on the light-emitting side of the coupling lens. The light emitted from the coupling lens enters the optical waveguide element, and after multiple reflections within the optical waveguide element, it exits from the optical waveguide element.

13. The display device according to any one of claims 1-10, further comprising: A control device, connected to the image source, is configured to control the luminous intensity of the sub-pixels included in the sub-display area based on the correspondence between the image after passing through the coupling lens and the field of view angle of the main ray of the sub-display area after passing through the coupling lens.

14. The display device of claim 13, wherein, The control device includes 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 according to any one of claims 1-10, wherein, The display device is a near-eye display device.

16. A display method according to any one of claims 1-15, comprising: Acquire an image to be displayed, wherein the image to be displayed is an image after passing through the coupling lens, and the image to be displayed includes multiple sub-image regions, and the multiple sub-image regions correspond one-to-one with the multiple sub-display regions; Based on the field of view of the principal ray passing through the coupling lens in the sub-display area, the relative coordinate position relationship between the sub-image area of ​​the image to be displayed and the corresponding sub-display area of ​​the image source is determined; as well as The luminous intensity of the sub-pixels included in the sub-display area is controlled according to the relative coordinate position relationship.

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

Images