Light field display device and wearable device

Abstract

The present invention discloses a light field display device and a wearable device. The light field display device includes: a display panel 1 including a plurality of pixels 2, an imaging structure 3 located on the light-emitting side of the display panel 1, a first plane 2 located on the side of the imaging structure 3 that is away from the display panel 1, and a transmissive lens structure 5 located on the side of the imaging structure 3 that is away from the display panel 1. The imaging structure 3 is used to image light rays emitted from the display panel 1 so that the light rays emitted from the display panel 1 form a real image on the first plane 4. The transmissive lens structure 5 is used to magnify the real image to form a virtual image so that the pupil of a human eye 6 receives the virtual image. The virtual image received by the pupil of one eye is formed by light rays emitted from at least two pixels 2.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and particularly to a light field display device and a wearable device.

Background Art

[0002] With the continuous development of display technology, three-dimensional (3D) display technology has attracted more and more attention. With 3D display technology, the display screen can be made three-dimensional and realistic.

[0003] In a normal augmented reality display system, parallax 3D is formed by giving images with different parallaxes to the left and right eyes respectively. However, in this method, as shown in FIG. 1, the human eye is induced to recognize the corresponding depth of field by the intersection of the light rays emitted from the left and right eyes. However, the depth of focus of one eye by both eyes and the depth at which the image is seen most clearly with one eye, that is, the convergence depth of both eyes, are not on the same plane. The human eye feels a convergence collision and causes visual fatigue.

Summary of the Invention

Means for Solving the Problems

[0004] The light field display device provided by an embodiment of the present invention includes a display panel including a plurality of pixels, an imaging structure located on the light-emitting side of the display panel, the imaging structure imaging the light rays emitted from the display panel and functioning such that the light rays emitted from the display panel form a real image on a first plane, the first plane being located on the side of the imaging structure facing away from the display panel, the imaging structure, a transmissive lens structure located on the side of the imaging structure facing away from the display panel, the transmissive lens structure magnifying the real image to form a virtual image and functioning such that the pupil of the human eye receives the virtual image, the virtual image received by the pupil of one eye being formed by the light rays emitted from at least two pixels, the transmissive lens structure.

[0005] In some embodiments, the imaging structure includes a plurality of microlenses arranged in an array, and the focal lengths of the plurality of microlenses are the same.

[0006] In some embodiments, the focal point of the transmission lens structure is located in the first plane.

[0007] In some embodiments, the display panel includes multiple pixels, and there is a one-to-one correspondence between the pixels and the microlenses.

[0008] In some embodiments, the distance H1 between the transmission lens structure and the imaging structure satisfies the following equation: P1 / H1 = EB / ER; Here, EB is the eye movement distance, ER is the distance from the human eye to the transparent lens structure, and P1 is the width of the display panel in any direction of eye movement distance.

[0009] In some embodiments, the pixel includes a plurality of types of subpixel cells, the display panel includes a first light-emitting plane, the plurality of types of subpixel cells have different light-emitting colors in the first light-emitting plane, and the distance a between the microlens and the first light-emitting plane satisfies the following equation: tan(fov1) = D1 / H1 = SS / a; Here, SS is the aperture of the microlens, D1 is the aperture of the transmission lens structure, and fov1 is the field of view of the microlens.

[0010] In some embodiments, in any eye movement distance direction, a plurality of pixels are divided into a plurality of pixel rows, each pixel row containing v pixels arranged in the eye movement distance direction, where v is an integer greater than 2, and the aperture SS of the microlens satisfies the following equation: SS = P1 / v.

[0011] In some embodiments, v is 30 or less.

[0012] In some embodiments, the focal length F1 of the transmissive lens structure satisfies the following equation: 1 / ER + 1 / H1 = 1 / F1.

[0013] In some embodiments, the distance b between the first plane and the microlens satisfies the following equation: b = H1 - a - F1

[0014] In some embodiments, the distance between the multiple microlenses and the transmission lens structure is less than or equal to the focal length of the transmission lens structure.

[0015] In some embodiments, the display panel includes a plurality of pixel groups, the pixels include a plurality of sub-pixel cells, the display panel includes a first light-emitting plane, the plurality of sub-pixel cells have different light-emitting colors in the first light-emitting plane, and the distance a between the microlens and the first light-emitting plane satisfies the following equation: tan(fov1)=EB / H1=SS / a; Here, fov1 is the field of view of the microlens, EB is the eye movement distance, F1 is the focal length of the transmission lens structure, and SS is the aperture of the microlens.

[0016] In some embodiments, the focal length F1 of the transmissive lens structure satisfies the following equation: tan(fov2 / 2)=(P1 / 2) / F1 Here, P1 is the width in any direction of eye movement distance, and fov2 is the field of view of the transmission lens structure.

[0017] In some embodiments, the distance H1 between the microlens and the transmissive lens structure is equal to the focal length F1 of the transmissive lens structure, the distance between the first light-emitting plane and the microlens is greater than the focal length of the microlens, and the distance a between the first light-emitting plane and the microlens satisfies the following equation: tan(fov1) = EB / F1 = SS / a.

[0018] In some embodiments, the distance H1 between the microlens and the transmissive lens structure is less than the focal length F1 of the transmissive lens structure, and the distance between the first light-emitting plane and the microlens is greater than the focal length of the microlens.

[0019] In some embodiments, the aperture SS of the microlens satisfies the following equation: SS = v × P2; where P2 is the pixel size in any direction of the eye movement distance.

[0020] In some embodiments, the distance b between the first plane and the microlens satisfies the following equation: (1 / -L1)+(1 / (F1 - b)) = 1 / F1 where L1 is the distance between the optimal depth of field and the transmissive lens structure.

[0021] In some embodiments, the imaging structure further includes a first base substrate located between the plurality of microlenses and the display panel and bonded to the display panel.

[0022] In some embodiments, the imaging structure further includes a bonding frame located between the plurality of microlenses and the display panel and bonded to the display panel in the peripheral region of the display panel.

[0023] In some embodiments, the imaging structure further includes a first flat layer located on the side of the microlens facing away from the display panel.

[0024] In some embodiments, the microlens is a spherical lens, and the curved surface region of the spherical lens faces the transmissive lens structure.

[0025] In some embodiments, the microlens includes a stacked first cylindrical lens and a second cylindrical lens, the extending directions of the first cylindrical lens and the second cylindrical lens intersect, and the curved surface regions of the first cylindrical lens and the second cylindrical lens face the transmissive lens structure.

[0026] In some embodiments, the transmission lens structure includes a plurality of lenses, each of which is at least one of a straight lens, a free-form lens, and a Fresnel lens.

[0027] In some embodiments, the transmission lens structure is a folded optical path structure.

[0028] In some embodiments, a pixel includes a plurality of subpixel cells, each subpixel cell includes a plurality of subpixels with the same emitted color, each subpixel includes a color film, the emitted color of the color film corresponds to the color of the subpixel, and the plane on which the surface of the color film faces the microlens is the first emitted plane.

[0029] In some embodiments, a light-emitting device is included, located on the side of the color film that faces away from the microlenses.

[0030] In some embodiments, the light-emitting colors of multiple light-emitting devices included in the display panel are the same.

[0031] In some embodiments, the color film extends to the region between adjacent subpixels, and color films belonging to different subpixel cells and contained within two adjacent subpixels are stacked and arranged in the region between those two adjacent subpixels.

[0032] In some embodiments, the subpixel further includes a thin-film transistor located on the side of the color film that is away from the microlens, and a pixel electrode located between the thin-film transistor and the color film.

[0033] In some embodiments, a pixel includes a plurality of subpixel cells, a subpixel cell includes a plurality of subpixels with the same emitted color, a subpixel includes a light-emitting device, in a pixel, the emitted colors of the light-emitting devices included in different types of subpixel cells are different, the light-emitting device includes a light-emitting layer, and the first light-emitting plane is the light-emitting surface of the light-emitting layer.

[0034] In some embodiments, the display panel further includes a sealing layer located on the side of the light-emitting device facing the imaging structure, and a second planarizing layer located on the side of the second inorganic sealing layer facing away from the first inorganic sealing layer, wherein the sealing layer includes a first inorganic sealing layer and a second inorganic sealing layer sequentially stacked on the side of the light-emitting device facing the imaging structure.

[0035] In some embodiments, the display panel further includes a plurality of light-gathering structures located on the side of the second planarization layer that is away from the light-emitting device, the light-gathering structures corresponding one-to-one with subpixels.

[0036] In some embodiments, the optical field display device includes two display panels corresponding to the left and right eyes, two imaging structures corresponding to the left and right eyes, and two transmission lens structures corresponding to the left and right eyes, respectively.

[0037] A wearable device provided by an embodiment of the present invention includes a light field display device provided by an embodiment of the present invention.

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings necessary for describing the embodiments. Clearly, the drawings described below represent only a few embodiments of the present invention, and those skilled in the art can obtain other drawings based on these without any creative effort. [Brief explanation of the drawing]

[0039] [Figure 1] This is a schematic diagram illustrating that the binocular depth of focus and monocular depth of focus in related technologies do not lie on the same plane. [Figure 2] This is a schematic diagram of the structure of one display device provided by an embodiment of the present invention. [Figure 3] This is a schematic diagram showing the inverse tracing of the eye-entering ray for one monocular eye with two viewpoints, as provided by an embodiment of the present invention. [Figure 4] This is a schematic diagram of the structure of another display device provided by an embodiment of the present invention. [Figure 5] This is a schematic diagram of the structure of a microlens provided by an embodiment of the present invention. [Figure 6] This is a schematic diagram of the pixel arrangement in one display panel provided by an embodiment of the present invention. [Figure 7] This is a schematic diagram of the structure of one display panel provided by an embodiment of the present invention. [Figure 8] This is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. [Figure 9] This is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. [Figure 10] This is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. [Figure 11] This is a schematic diagram of the structure of another display panel provided by an embodiment of the present invention. [Figure 12] This is a schematic diagram of imaging of one display device provided by an embodiment of the present invention. [Figure 13] This is a schematic diagram of imaging of another display device provided by an embodiment of the present invention. [Modes for carrying out the invention]

[0040] To further clarify the object, technical solutions, and advantages of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments. Obviously, the embodiments described are only some, and not all, embodiments of the present invention. Also, the embodiments and features in the embodiments of the present invention can be combined with each other, as long as they do not contradict each other. All other embodiments that a person skilled in the art can obtain without creative work based on the embodiments described of the present invention are within the scope of the protection of the present invention.

[0041] Unless otherwise defined, technical or scientific terms used in this invention shall have the ordinary meanings understood by a person of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are used solely to distinguish different components. Similar terms such as “includes” or “incorporates” mean that the element or object listed before the term includes the elements or objects and their equivalents listed after the term, but do not exclude other elements or objects. Similar terms such as “connect” or “link” are not limited to physical or mechanical connections, but may include electrical connections, and may be direct or indirect.

[0042] It should be noted that the size and shape of each figure in the drawings do not reflect actual proportions and are merely for schematic explanation of the present invention. Also, the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0043] An embodiment of the present invention provides a light field display device, as shown in Figure 2. The light field display device is A display panel 1 containing multiple pixels 2, The imaging structure 3 located on the light-emitting side of the display panel 1, The imaging structure 3 includes a transmissive lens structure 5 located on the side facing away from the display panel 1.

[0044] The imaging structure 3 images the light rays emitted from multiple pixels 2, and functions to cause the light rays emitted from the display panel 1 to form a real image on the first plane 4. The first plane 4 is located on the side of the imaging structure 3 that faces away from the display panel 1.

[0045] The aforementioned transmissive lens structure 5 magnifies and focuses a real image to form a virtual image, which the pupil of the human eye 6 receives. The virtual image received by the pupil of one eye is formed by light rays emitted from at least two pixels 2.

[0046] When viewing using the light field display device provided by the embodiment of the present invention, as shown in Figure 2, the human eye 6 is positioned on the side of the transmissive lens structure 5 that faces away from the imaging structure 3, that is, the human eye 6, the transmissive lens structure 5, the imaging structure 3, and the display panel 1 are arranged sequentially along the first direction Z.

[0047] The optical field display device provided by the embodiments of the present invention is a three-dimensional (3D) optical field display device based on optical field display. Optical field display makes it possible to realize a true 3D scene similar to the real world. Generally, a beam of light with a known direction is called a ray field in space, and is abbreviated as optical field. In an optical field, the beam of light entering the pupil of the eye needs to have an intersection point in order to form an image in space. One pixel represents one ray and corresponds to one viewpoint. In order to realize optical field display, the pupil of one eye needs to receive at least two viewpoints simultaneously.

[0048] In the optical field display device provided by the embodiment of the present invention, the virtual image received by the pupil of one eye is formed by light rays emitted from at least two pixels, that is, the pupil of one eye receives at least two viewpoints simultaneously. As a result, the light rays emitted from the pixels propagate to the position of the pupil, forming a viewing area. The transmission lens structure magnifies the real image to form a virtual image at infinity, making it possible to adjust the depth of field of one eye, and by focusing the lens of the human eye, it is possible to convert between clarity and blur at different depths of field. This realizes that the focusing of one eye and the convergence of both eyes are on the same plane, thus avoiding the human eye feeling convergence collision and causing visual fatigue. Furthermore, in the present invention, the imaging structure first forms a real image on a first plane from light rays emitted from multiple pixels, and then forms a virtual image at infinity, so the size of the light spot that the pixels image becomes smaller, which is advantageous for improving image quality.

[0049] In practical implementation, taking the example of a single eye receiving two viewpoints simultaneously, a schematic diagram of tracing the entry rays of the two viewpoints into the single eye is shown in Figure 3. Different viewpoints enter the pupil at different positions, and these different viewpoints form an intersection in space, thereby creating different depths of field. Each eye can focus according to different convergence angles for different depths of field, thus avoiding a collision between the focusing and convergence of both eyes. Furthermore, different image rendering can be adjusted according to the focusing state of the human eye, enabling switching between different depths of field.

[0050] Next, the configurations of the imaging structure, display panel, and transmission lens structure included in the display device provided by the embodiments of the present invention will be described with examples.

[0051] In some embodiments, as shown in Figure 2, the imaging structure 3 includes a plurality of microlenses 301 arranged in an array.

[0052] In some embodiments, the focal lengths of multiple microlenses are the same.

[0053] In the optical field display device provided by the embodiment of the present invention, since the focal lengths of the multiple microlenses are the same and the focal points of the multiple microlenses are located on the same plane, the light rays emitted from the display panel can form a real image on the same plane, i.e., the first plane, thereby reducing the difficulty of designing the display device. Furthermore, compared to the case of multifocal plane imaging in which the focal lengths of the microlenses are not exactly the same, it is possible to avoid affecting the resolution of the display device.

[0054] In some embodiments, as shown in Figure 2, the imaging structure 3 further includes a first base substrate 302 located between the plurality of microlenses 301 and the display panel 1, and a first flat layer 304 located on the side of the microlenses 301 that faces away from the display panel 1.

[0055] In specific implementation, for example, multiple microlenses can be formed on one side of a first base substrate using an injection molding process. The material of the microlenses may be, for example, polyethylene glycol terephthalate (PET). The first base substrate may be, for example, a glass substrate. Alternatively, the material of the first base substrate may include polymethyl methacrylate (PMMA).

[0056] In specific implementation, the first flat layer is used to planarize multiple microlenses, and the material of the first flat layer may be, for example, an organic material, and the organic material may be, for example, organosilicon (OCR).

[0057] In some embodiments, the difference between the refractive index of the microlens and the refractive index of the first flat layer is 0.2 or less. That is, because the difference in refractive index between the microlens and the first flat layer is small, it is possible to avoid the refraction of light rays at a large angle.

[0058] In specific implementations, for example, the refractive index of the microlens is between 1.62 and 1.65. In some cases, the refractive index of the microlens may be 1.62, while the refractive index of the first flat layer is 1.42.

[0059] In some embodiments, as shown in Figure 2, the first base substrate 302 is bonded to the display panel 1.

[0060] Alternatively, in some embodiments, as shown in Figure 4, the imaging structure 3 further includes a bonded frame 303 located between the multiple microlenses 301 and the display panel 1, and bonded to the display panel 1.

[0061] In other words, the image-forming structure and the display panel can be framed together using a laminated frame.

[0062] In the actual implementation, as shown in Figure 4, the bonding frame 303 is positioned between the first base substrate 302 and the display panel 1, and the bonding frame 303 is bonded to the first base substrate 302 and the display panel 1 at their edges. In region A surrounded by the bonding frame 303, the space between the first base substrate 302 and the display panel 1 is filled with air.

[0063] In some embodiments, as shown in Figures 2 and 4, the microlens 301 is a spherical lens 3011, and the curved region of the spherical lens 3011 faces the transmissive lens structure 5.

[0064] This allows the light rays emitted from the display panel to be focused, and the image formed on the first plane after the light rays have passed through multiple microlenses becomes a real image.

[0065] Alternatively, in some embodiments, as shown in Figure 5, the microlens 301 includes a stacked first cylindrical lens 3012 and a second cylindrical lens 3013, where the extending directions of the first cylindrical lens 3012 and the second cylindrical lens 3013 intersect, so that the action of the two stacked cylindrical lenses is equivalent to that of a spherical lens. For example, the extending directions of the first cylindrical lens 3012 and the second cylindrical lens 3013 are perpendicular, and the curved regions of the first cylindrical lens 3012 and the second cylindrical lens 3013 face a transmissive lens structure (not shown).

[0066] This allows the light rays emitted from the display panel to be focused, and the image formed on the first plane after the light rays have passed through multiple microlenses becomes a real image.

[0067] In practical implementation, whether the image-forming structure is bonded to the display panel using a bonded frame or directly to the display panel using a first base substrate, the image-forming structure and the display panel can be bonded using an optical adhesive. For example, both the first base substrate and the bonded frame can be made of light-transmitting material. The first base substrate may be, for example, a glass substrate.

[0068] In some embodiments, as shown in Figure 6, the pixel 2 includes multiple types of subpixel cells 201. Specifically, as shown in Figure 6, the pixel 2 includes, for example, three types of subpixel cells 201, where the three types of subpixel cells 201 are, for example, a red subpixel cell R', a blue subpixel cell B', and a green subpixel cell G'.

[0069] In specific implementation, as shown in Figure 6, the pixels 2 are arranged in an array along, for example, the second direction X and the third direction Y, and the three types of subpixel cells 201 are arranged sequentially along, for example, the third direction Y.

[0070] In some embodiments, as shown in Figure 6, the subpixel cell 201 includes multiple subpixels 2011 with the same light-emitting color.

[0071] In specific implementation, as shown in Figure 6, the multiple subpixels 2011 contained in the subpixel cell 201 are arranged sequentially, for example, along the second direction X. In specific implementation, the red subpixel cell R' contains multiple red subpixels R arranged along the second direction X, the blue subpixel cell B' contains multiple blue subpixels B arranged along the second direction X, and the green subpixel cell G' contains multiple green subpixels G arranged along the second direction X.

[0072] In specific implementation, as shown in Figure 6, in the second direction X, all subpixels 2011 in a row are the same color. In the light field display device provided by the embodiment of the present invention, the display panel includes a plurality of pixel groups, each pixel group includes a plurality of subpixel cells of different colors, each subpixel cell includes a plurality of subpixels of the same color, and in the second direction X, the spacing between two adjacent subpixels is small, so that the subpixels in each row can form a continuous light-emitting surface.

[0073] In some embodiments, the display panel is an electroluminescent display panel.

[0074] In some embodiments, when the display panel is an electroluminescent display panel, the subpixel 2011 includes a light-emitting device 20111, as shown in Figure 7.

[0075] In specific implementation, the light-emitting device may be, for example, one of the following: organic light-emitting diode (OLED), quantum dot light-emitting diode (QLED), micro inorganic light-emitting diode (micro LED), or mini light-emitting diode (mini LED). In other words, the electroluminescent display panel may be, for example, one of the following: organic light-emitting diode (OLED) display panel, quantum dot light-emitting diode (QLED) display panel, micro inorganic light-emitting diode (micro LED) display panel, or mini light-emitting diode (mini LED) display panel.

[0076] In specific implementation, as shown in Figure 7, the light-emitting device 20111 includes a stacked anode 201111, a light-emitting layer 201112, and a cathode 201113.

[0077] In specific implementation, a hole injection layer, a hole transport layer, etc. may be included between the anode and the light-emitting layer, and an electron injection layer, an electron transport layer, etc. may be included between the cathode and the light-emitting layer.

[0078] In some embodiments, as shown in Figure 7, the display panel 1 further: The second base board 101 and A drive circuit layer 102 is located between the second base substrate 101 and the light-emitting device 20111, The sealing layer 107 of the light-emitting device 20111 is located on the side facing the imaging structure (not shown), that is, on the side of the light-emitting device 20111 that is facing away from the second base substrate 101, The second inorganic sealing layer 1072 includes a second planarization layer 108 located on the side facing away from the first inorganic sealing layer 1071, The sealing layer 107 includes a first inorganic sealing layer 1071 and a second inorganic sealing layer 1072 that are sequentially stacked on the side of the light-emitting device 20111 facing the imaging structure (i.e., the side where the light-emitting device 20111 faces away from the second base substrate 101).

[0079] In practical implementation, the sealing layer is used to protect the light-emitting device and prevent water and oxygen from eroding the light-emitting layer of the device. The material of the first inorganic sealing layer is, for example, silicon nitride, and the material of the second inorganic sealing layer is, for example, aluminum oxide.

[0080] In specific implementation, taking an OLED display panel as an example, as shown in Figure 7, the driving circuit layer 102 may include, for example, a thin-film transistor TFT, and may further include a capacitor (not shown). The thin-film transistor TFT includes an active layer 1021, a gate G, a source S, and a drain D. In specific implementation, at least a driving transistor is included among the thin-film transistors in the driving circuit layer, and the drain D of the driving transistor is electrically connected to the anode 201111 of the light-emitting device 20111. The material of the active layer may include, for example, silicon or an oxide semiconductor. The gate, source, and drain may include, for example, a metallic material.

[0081] In specific implementation, as shown in Figure 7, the thin-film transistor TFT has a top-gate structure, meaning the gate G is located on the side of the active layer 1021 that faces away from the second base substrate 101. The display panel 1 further includes a buffer layer 103 located between the second base substrate 101 and the active layer 1021, a gate insulating layer 104 located between the active layer 1021 and the gate G, an interlayer insulating layer 105 located between the gate G and the source S and drain D, and a third planarization layer 106 located between the source S and drain D and the anode 201111.

[0082] In specific implementation, taking an OLED display panel as an example, as shown in Figure 7, the display panel further includes a pixel definition layer 109 located on the side of the third planarization layer 106 that faces away from the second base substrate 101. The pixel definition layer 109 has a first aperture region 1091, which covers the edge portion of the anode 201111. The orthographic projection of the first aperture region 1091 on the second base substrate 101 falls into the anode 201111, and the anode 201111, the light-emitting layer 201112, the cathode 201113, and the first aperture region 1091 are stacked and arranged to form a light-emitting device.

[0083] In some embodiments, within a single pixel, the emission colors of light-emitting devices corresponding to subpixels in different subpixel cells are different. The emission color of a light-emitting device corresponds to the light-emitting color of the subpixel to which the light-emitting device belongs. Light-emitting devices in red subpixels emit red light, light-emitting devices in blue subpixels emit blue light, and light-emitting devices in green subpixels emit green light.

[0084] Alternatively, in some embodiments, as shown in Figure 8, the subpixel 2011 further includes a color film 20112.

[0085] In specific implementation, in the case of an electroluminescent display panel, the color film is located on the side of the light-emitting device that faces away from the second base substrate. As shown in Figure 8, if the display panel includes a sealing layer 107, the color film 20112 is located on the side of the sealing layer 107 that faces away from the light-emitting device 20111.

[0086] In practice, subpixels in different subpixel cells correspond to color films of different colors. The emitted color of a color film corresponds to the emitted color of the subpixel to which that color film belongs. A red subpixel contains a red color film, a blue subpixel contains a blue color film, and a green subpixel contains a green color film.

[0087] In practical implementation, the light-emitting devices in each subpixel of the display panel are the same color. Color conversion is achieved using color film to display full color. For example, the light-emitting devices in each subpixel of the display panel emit white light. Alternatively, the light-emitting devices in each subpixel of the display panel can emit blue light.

[0088] Of course, when actually implementing this, the emission color of the light-emitting device corresponding to the subpixels of different subpixel cells may be different, and the color purity is improved by the color film. In each subpixel, the emission color of the light-emitting device is the same as the emitted color of the color film.

[0089] In some embodiments, as shown in Figure 9, the color film 20112 extends to the region between adjacent subpixels 2011, and color films 20112 belonging to different subpixel cells 201 and contained in two adjacent subpixels 2011 are stacked and arranged in the region between the two adjacent subpixels 2011.

[0090] Note that Figure 9 only shows the red subpixel R and the green subpixel G. The red color film r contained in the red subpixel R and the green color film g contained in the green subpixel G overlap in the region between the red subpixel R and the green subpixel G. The red color film r contained in the red subpixel R and the blue color film b contained in the blue subpixel (not shown) overlap in the region between the red subpixel R and the blue subpixel (not shown). The green color film g contained in the green subpixel G and the blue color film b contained in the blue subpixel (not shown) overlap in the region between the green subpixel G and the blue subpixel (not shown).

[0091] In the display device provided by an embodiment of the present invention, color films belonging to different subpixel cells and contained in two adjacent subpixels are stacked and arranged in the region between the two adjacent subpixels. The two stacked color films can block the light emitted from the subpixel region, thus avoiding interference between adjacent subpixel cells without the need for a black matrix. This avoids the reduction in subpixel aperture ratio that would occur with the provision of a black matrix. This is advantageous for improving the display effect.

[0092] In some embodiments, as shown in Figure 9, the display panel further includes a first protective layer 111 covering the color film 20112.

[0093] In some embodiments, as shown in Figure 10, the display panel 1 further includes a plurality of light-gathering structures 116 located on the side of the second planarization layer 108 that is facing away from the light-emitting device 20111, with each light-gathering structure 116 corresponding one-to-one with a subpixel 2011.

[0094] In specific implementation, the light-gathering structure covers the orthogonal projection of the subpixel's light-emitting region on the first base substrate.

[0095] Figure 10 illustrates an example where the display panel includes a color film 20112, and the light-gathering structure 116 is located on the side of the first protective layer 111 that faces away from the color film 20112. When the display panel does not include a color film, the light-gathering structure 116 is located on the side of the second planarization layer 108 that faces away from the light-emitting device 20111. In some embodiments, as shown in Figure 10, the display panel further includes a fourth planarization layer 117 located on the side of the light-gathering structure 116 that faces away from the second planarization layer 108.

[0096] In the display device provided by the embodiment of the present invention, the display panel includes a light-gathering structure, which allows for the focusing of light emitted from the light-emitting device, thus improving light utilization efficiency.

[0097] In practical implementation, the light-gathering structure is a microlens. The microlens is, for example, a spherical lens, and the curved surface of the spherical lens is positioned away from the first base substrate so that the light rays can be focused.

[0098] Alternatively, in some embodiments, the display panel may be a liquid crystal display panel (LCD).

[0099] In some embodiments, as shown in Figure 11, the subpixel 2011 is: Color film 20112 and, A thin-film transistor TFT is positioned with color film 20112 facing away from a microlens (not shown), It includes a pixel electrode 20113 located between a thin-film transistor TFT and a color film 20112, The emitted color of color film 20112 corresponds to the color of subpixel 2011.

[0100] In specific implementation, if the display panel is a liquid crystal display panel, as shown in Figure 11, the display panel specifically includes an array substrate 112 and a counter substrate 113 arranged opposite each other, and a liquid crystal layer 114 located between the array substrate 112 and the counter substrate 113. The array substrate 112 includes a thin-film transistor TFT and a pixel electrode 20113. The counter substrate 113 includes a color film 20112. The array substrate 112 further includes a second base substrate 101, and the thin-film transistor TFT is located between the second base substrate 101 and the pixel electrode 20113. The counter substrate 113 further includes a third substrate 1132 and a black matrix 1131 located on the side of the third substrate 1132 facing the liquid crystal layer 114, the black matrix 1131 includes a second aperture, the second aperture corresponds to the aperture region of a subpixel 2011, and the color film 20112 includes a portion located within the second aperture. Figure 11 illustrates the case where the common electrode 115 is located on the array substrate 112. Of course, the common electrode 115 may also be located on the opposing substrate 113.

[0101] In specific implementation, as shown in Figure 11, the thin-film transistor TFT has a top-gate structure, meaning the gate G is located on the side of the active layer 1021 that is away from the second base substrate 101. The array substrate 112 further includes a buffer layer 103 located between the second base substrate 101 and the active layer 1021, a gate insulating layer 104 located between the active layer 1021 and the gate G, an interlayer insulating layer 105 located between the gate G and the source S and drain D, a third planarization layer 106 located between the source S and drain D and the pixel electrode 20113, a second protective layer 1122 located between the pixel electrode 20113 and the common electrode 115, and a third protective layer 1123 located between the common electrode 115 and the liquid crystal layer 114.

[0102] In some embodiments, if the display panel is a liquid crystal display panel, the display device further includes a backlight module located on the side of the display panel that faces away from the imaging structure. The backlight module includes a backlight light source, which is, for example, an electroluminescent device.

[0103] In some embodiments, as shown in Figures 2 and 4, the transmission lens structure 5 includes a plurality of lenses 501, each of which is at least one of a straight lens, a free-form lens, and a Fresnel lens.

[0104] In Figures 2 and 4, the case in which the transmission lens structure 5 includes two lenses 501 is explained as an example, where the two lenses 501 are the first lens 5011 and the second lens 5012, respectively, and the second lens 5012 is located between the first lens 5011 and the imaging structure 3.

[0105] In specific implementation, the first lens can be made of, for example, EP8000 material, with a refractive index of 1.661 and an Abbe number of 20.53, and the second lens can be made of, for example, K26R material, with a refractive index of 1.535 and an Abbe number of 55.634. The parameters of lens 501 shown in Figure 4 are as shown in Table 1, where r1 is the radius of curvature of the first surface 5011-1 of the first lens 5011, r2 is the radius of curvature of the second surface 5011-2 of the first lens 5011, r3 is the radius of curvature of the first surface 5012-1 of the second lens 5012, and r4 is the radius of curvature of the second surface 5012-2 of the second lens 5012.

[0106] [Table 1]

[0107] Of course, when actually implementing it, the transparent lens structure may include even more lenses.

[0108] Alternatively, in some embodiments, the transmission lens structure includes a folded optical path (Pancake) structure. For example, a Pancake includes a semi-transparent semi-reflective mirror, a quarter-phase delay sheet, and a reflective polarizer. The optical design of the Pancake is based on the polarization principle, utilizing the selective reflection and transmission properties of the reflective polarizer for different polarizations. By incorporating a quarter-phase delay sheet, the polarization form is adjusted, and the light ray is reflected back and forth between the semi-transparent semi-reflective mirror and the reflective polarizer, finally being transmitted through the reflective polarizer. Circularly polarized light changes to linearly polarized light after passing through the quarter-phase delay sheet, reaches the reflective polarizer and is reflected, then passes through the quarter-phase delay sheet a second time to become circularly polarized again, is reflected by the semi-transparent semi-reflective mirror, passes through the quarter-phase delay sheet a third time to become linearly polarized again, and this time rotated 90° compared to the first time, it passes through the reflective polarizer to complete the image.

[0109] Alternatively, when implemented in practice, the transmission lens structure may include a combination of a lens and a pancake.

[0110] In its implementation, the display device further includes an assembly frame, which is used to mechanically assemble the transmission lens structure and the imaging structure, ensuring that the distance between the imaging structure and the transmission lens structure satisfies the required conditions.

[0111] The display device needs to store pre-set light field rendering rules that match each parameter of the display device, thereby enabling it to obtain a display image for the display panel corresponding to the 3D image to be displayed. For example, in actual implementation, a light field database is constructed based on the coordinate information of the transmission lens structure, the imaging structure, and the coordinate information of the pixels on the display panel, and light field information suitable for the display device is obtained. Here, one pixel represents one light ray, and one light ray corresponds to one viewpoint. When determining the display image for the display panel corresponding to the 3D image to be displayed, the light field information database is combined to intersect the depth of field to be displayed with the light field in space, and pixels on the display panel are determined based on the mapping relationship to obtain a light field rendering image of that depth of field. The light field images of each depth of field obtained by rendering are superimposed, and corresponding display information is provided to make the pixels emit light. In this way, through the imaging structure and the transmission lens structure, a 3D scene that can be focused on by the human eye can be reproduced, just like in the real world.

[0112] Next, we will explain, with examples, the necessary conditions that must be met between the imaging structure, transmission lens structure, and display panel included in the display device, as well as the relevant parameters of each structure.

[0113] When implementing this specifically, for example, the position of the first plane can be selected based on the image quality and the size of the display device.

[0114] In some embodiments, as shown in Figure 12, the focal point of the transmission lens structure 5 is located on the first plane 4. That is, the distance between the transmission lens structure 5 and the first plane 4 is the focal length F1 of the transmission lens structure 5.

[0115] In the display device provided by the embodiment of the present invention, since the focal point of the transmissive lens structure is located on the first plane, the imaging effect of the virtual image formed by the transmissive lens structure magnifying the real image formed on the first plane is good. This is advantageous for improving image quality and, consequently, for improving the display effect.

[0116] In Figure 12, the transmission lens structure 5, the imaging structure 3, and the first light-emitting plane 7 are represented by line segments. The first light-emitting plane is the plane furthest from the imaging structure where the light-emitting colors of the multiple types of subpixel cells contained in the pixel are different.

[0117] In specific implementation, if the display panel includes a color film, the plane on which the surface of the color film facing the imaging structure exists is the first light-emitting plane. In specific implementation, if the display panel includes a light-emitting device but does not include a color film, the first light-emitting plane is the plane on which the light-emitting surface of the light-emitting layer exists.

[0118] In some embodiments, when the focal point of the transmission lens structure lies on a first plane, there is a one-to-one correspondence between pixels and microlenses.

[0119] In practical implementation, pixels and microlenses correspond one-to-one, with a single microlens responsible for the entire screen of a single viewpoint. The design ensures that all pixels on the display panel are projected within the eye movement distance.

[0120] In some embodiments, in the direction of any eye movement distance, a plurality of pixels are divided into a plurality of pixel rows, each pixel row containing v pixels arranged along the eye movement distance, where v is an integer of 2 or more.

[0121] The direction of eye movement distance is either the second or third direction. Taking the eye movement distance in the second direction X as an example, as shown in Figure 6, multiple pixels 2 are divided into multiple pixel rows 2-1, and each pixel row 2-1 contains v pixels 2 aligned along the second direction X, where v is an integer greater than or equal to 2. This allows the pupil of one eye to receive at least two viewpoints. Figure 6 shows only two pixels 2 within one pixel row 2-1. Multiple pixel rows 2-1 extend along the second direction X and are aligned along the third direction Y.

[0122] In some embodiments, v is 30 or less.

[0123] Furthermore, to enable multi-view display and improve the display effect, v can be set to 4 or more and 30 or less.

[0124] Since there is a one-to-one correspondence between microlenses and pixels, in some embodiments, the aperture SS of the microlens satisfies the following conditions: SS = P1 / v; Here, P1 is the width of the display panel in any direction of eye movement distance.

[0125] Note that the width of the eye movement distance in the second and third directions is usually the same. It is also possible to set the width of the display panel in the second and third directions to be the same, the width of the pixels in the second and third directions to be the same, the width of the aperture of the transmission lens structure in the second and third directions to be the same, and the width of the aperture of the microlens in the second and third directions to be the same. Figure 12 illustrates this using the eye movement distance in the second direction X as an example. For example, P1 is the width of display panel 1 in the second direction X.

[0126] In some embodiments, P1 = 0.9 inches = 16.128 millimeters, and if v is 4 or greater and 30 or less, then SS is 4.032 mm or greater and 0.5376 mm or less.

[0127] In some embodiments, as shown in Figure 12, the distance H1 between the transmission lens structure 5 and the imaging structure 3 satisfies the following conditions: P1 / H1 = EB / ER; Here, EB is the eye movement distance, and ER is the distance from the human eye to the transparent lens structure 5.

[0128] In some embodiments, P1 = 0.9 inches = 16.128 millimeters, EB is 4 mm or more and 6 mm or less, ER is 15 mm or more and 25 mm or less, and H1 is 50 mm or more and 84 mm or less.

[0129] When implementing this specifically, the aperture D1 of the transmission lens structure can be designed based on the required field of view angle (fov2) of the incoming light. The aperture D1 of the transmission lens structure is the width of the transmission lens structure in the second and third directions (Y). For a 0.9-inch, 3840 resolution display panel, the fov2 required to achieve a resolution of one corner at 3840 resolution is 42°. If EB=5mm and ER=25mm, for example, D1 is between 27.85mm and 50mm.

[0130] When implementing this specifically, if EB=5mm and ER=25mm, then for a 0.9-inch display panel, H1=80.64mm.

[0131] In some embodiments, as shown in Figure 12, the distance a between the microlens 301 and the first light-emitting plane 7 included in the display panel 1 satisfies the following conditions: tan(fov1) = D1 / H1 = SS / a; Here, fov1 is the field of view of the microlens 301.

[0132] In some embodiments, if P1 = 0.9 inches = 16.128 millimeters, D1 is 27.85 mm or more and 50 mm or less, H1 is 50 mm or more and 84 mm or less, and SS is 4.032 mm or more and 0.5376 mm or less, then a is 10.2 mm or more and 4.41 mm or less.

[0133] In some embodiments, the focal length F1 of the transmissive lens structure 5 satisfies the following conditions: 1 / ER + 1 / H1 = 1 / F1.

[0134] When implementing this specifically, for a 0.9-inch display panel, if v=4, a=10.2mm, and if H1=80.64mm, F1=18.451.

[0135] In some embodiments, as shown in Figure 12, the distance b between the first plane 4 and the microlens 301 satisfies b = H1 - a - F1.

[0136] When implementing this specifically, for a 0.9-inch display panel, if v=4, a=10.2mm, H1=80.64mm, and if F1=18.451, b=51.99mm.

[0137] In the specific implementation, a is the object distance of the image formed by the microlens, and b is the image distance of the image formed by the microlens. Since a, b, and the focal length F2 of the microlens satisfy the imaging relation 1 / a + 1 / b = 1 / F2, F2 = 8.53 mm.

[0138] In some embodiments, the refractive index of the microlens is 1.62 or greater and 1.65 or less, and the refractive index of the first planarization layer is 1.42. To satisfy the requirements of parameters such as the focal length of the microlens, for example, the radius of curvature of the microlens is 1.705. In specific implementation, the microlens needs to satisfy the eye entry angle requirements, has a certain contraction rate, has a microlens aperture of 3.371 mm, and an arch height of 1.446 mm.

[0139] Of course, when actually implementing it, the first plane may be in a different position.

[0140] In some embodiments, as shown in Figure 13, the distance H1 between the microlens 301 array and the transmission lens structure 5 is less than or equal to the focal length of the transmission lens structure 5.

[0141] In the display device provided by the embodiment of the present invention, since the distance between the microlens array and the transmission lens structure is less than or equal to the focal length of the transmission lens structure, the distance between the microlens array and the transmission lens structure can be reduced while ensuring a certain image quality, and consequently the volume of the display device can be reduced.

[0142] In Figure 13, the transmission lens structure 5, imaging structure 3, and first light-emitting plane 7 are also represented by line segments. The first light-emitting plane is the plane furthest from the imaging structure where the light-emitting colors of the multiple types of subpixel cells contained in the pixel are different.

[0143] In specific implementation, if the display panel includes a color film, the plane on which the surface of the color film facing the imaging structure exists is the first light-emitting plane. In specific implementation, if the display panel includes a light-emitting device but does not include a color film, the first light-emitting plane is the plane on which the light-emitting surface of the light-emitting layer exists.

[0144] In some embodiments, the display panel includes multiple pixel groups, each containing v pixels, where v is an integer greater than 2, and there is a one-to-one correspondence between the pixel groups and the microlenses. That is, one microlens corresponds to multiple pixels.

[0145] In practice, one microlens corresponds to multiple pixels, and different microlenses are responsible for the entire screen of a single viewpoint; in other words, the resolution at a single viewpoint is equal to the number of microlenses.

[0146] In some embodiments, v is 30 or less.

[0147] Furthermore, to enable multi-view display and improve the display effect, v can be selected to be between 4 and 30.

[0148] Since one microlens corresponds to multiple pixels, in some embodiments, the microlens aperture SS satisfies the following conditions: SS = v × P²; Here, P2 is the pixel size.

[0149] Note that pixel size is the width of the pixel in its second or third direction, and typically, the width of a pixel in its second direction is equal to the width of a pixel in its third direction.

[0150] When implementing this in practice, the focal length of the transmitted lens structure can be designed based on the field of view of the incoming light rays of the required transmitted lens structure.

[0151] In some embodiments, the focal length F1 of the transmissive lens structure satisfies the following conditions: tan(fov2 / 2)=(P1 / 2) / F1; Here, P1 is the width in any direction of eye movement distance, and fov2 is the field of view of the transmission lens structure 5.

[0152] Specifically, to achieve an eye-entry field of view (FOV2) of 42° for a 0.9-inch display panel, the focal length of the eyepiece lens must be F1 = 20.8 mm.

[0153] When implementing this specifically, the aperture D1 of the transmission lens structure can be designed based on the required field of view angle (fov2) of the incoming light. The aperture D1 of the transmission lens structure is the width of the transmission lens structure in the second and third directions (Y). For a 0.9-inch, 3840 resolution display panel, the fov2 required to achieve a resolution of one corner at 3840 resolution is 42°. If EB=5mm and ER=25mm, for example, D1 is between 27.85mm and 50mm.

[0154] In some embodiments, the distance b between the first plane and the microlens satisfies the following conditions: (1 / -L1)+(1 / (F1-b))=1 / F1; Here, L1 is the distance between the optimal depth of field and the transmitted lens structure.

[0155] When implementing this specifically, considering the comfortable depth of field range due to the fusion of the human eye, the optimal imaging depth of field L1 is preferably 1000mm, and when F1=20.8mm, b=0.42mm.

[0156] When implementing this specifically, the pixels corresponding to a single microlens need to fill the eye movement distance EB.

[0157] In some embodiments, the distance a between the first light-emitting plane and the microlens 301 satisfies the following conditions: tan(fov1)=EB / H1=SS / a; Here, EB is the eye movement distance, H1 is the distance between the transmitting lens structure and the imaging structure, SS is the aperture of the microlens, and fov1 is the field of view of the microlens 301.

[0158] In some embodiments, the distance H1 between the microlens and the transmission lens structure is equal to the focal length F1 of the transmission lens structure, and the distance between the first light-emitting plane and the microlens is greater than the focal length of the microlens.

[0159] The distance a between the first light-emitting plane and the microlens 301 satisfies the following conditions: tan(fov1) = EB / F1 = SS / a.

[0160] In a specific implementation, taking the example of one microlens corresponding to four pixels, for a 0.9-inch display panel with a resolution of 3840 x 3840, the pixel size P2 is 4.2 micrometers x 4.2 micrometers, the pixel aperture ratio is 30%, and correspondingly SS = 0.016 mm. If EB = 5 mm and F1 = 20.8 mm, then a = 0.07 mm.

[0161] In the specific implementation, a is the object distance of the image formed by the microlens, and b is the image distance of the image formed by the microlens. Since a, b, and the focal length F2 of the microlens satisfy the imaging relation 1 / a + 1 / b = 1 / F2, F2 = 0.06 mm.

[0162] In some embodiments, the distance between the microlens and the transmission lens structure is less than the focal length of the transmission lens structure, and the distance between the first light-emitting plane and the microlens is greater than the focal length of the microlens.

[0163] In some embodiments, the optical field display device includes two display panels corresponding to the left and right eyes, two imaging structures corresponding to the left and right eyes, and two transmission lens structures corresponding to the left and right eyes, respectively.

[0164] When actually implementing this, the screens displayed on the two display panels are identical.

[0165] In the actual implementation, the configuration, size, and other parameters of the two display panels are the same, the configuration, size, and other parameters of the two imaging structures are the same, and the configuration, size, and other parameters of the two transmission lens structures are the same. The positional relationship between the display panel, imaging structure, and transmission lens structure corresponding to the left eye is the same as the positional relationship between the display panel, imaging structure, and transmission lens structure corresponding to the right eye.

[0166] A wearable device provided by an embodiment of the present invention includes a light field display device provided by an embodiment of the present invention.

[0167] In practical terms, the transparent lens structure can function, for example, as an eyepiece in a wearable device.

[0168] The wearable devices provided by embodiments of the present invention are any wearable product or component having a display function, such as a wearable helmet or wearable glasses. Other essential components of the wearable device should be understood by those skilled in the art and are not described in detail here, nor should they be construed as limiting the present invention. Embodiments of the wearable device can be found by referring to the embodiments of the optical field display devices described above, and any overlapping parts are not described here.

[0169] As described above, in the optical field display device provided by the embodiments of the present invention, the virtual image received by the pupil of one eye is formed by light rays emitted from at least two pixels, that is, the pupil of one eye receives at least two viewpoints simultaneously. As a result, the light rays emitted from the pixels propagate to the position of the pupil, forming a viewing area. The transmission lens structure magnifies the real image to form a virtual image at infinity, making it possible to adjust the depth of field of one eye, and by focusing the lens of the human eye, it is possible to convert between clarity and blur at different depths of field. This realizes that the focusing of one eye and the convergence of both eyes are on the same plane, thus avoiding the human eye feeling convergence collision and causing visual fatigue. Furthermore, in the present invention, the imaging structure first forms a real image on the first plane from light rays emitted from multiple pixels, and then forms a virtual image at infinity, so the size of the light spot that the pixels image becomes smaller, which is advantageous for improving image quality.

[0170] While preferred embodiments of the present invention have been described, those skilled in the art, knowing the basic creative concepts, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be construed to include all changes and modifications that fall within the scope of the preferred embodiments and the present invention.

[0171] Clearly, those skilled in the art may make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments. Therefore, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and the equivalent art, the present invention is also intended to include these modifications and variations. [Explanation of Symbols]

[0172] 1 Display Panel 2 pixels 3 imaging structure 4 1st plane 5. Transmitting lens structure 6. The human eye 7. First Idemitsu Plane Z 1st direction 301 Microlens 302 First base board 304 1st flat layer 303 Laminated Frame 3011 Spherical Lens 3012 First Cylindrical Lens 3013 Second Cylindrical Lens 201 subpixel cells R' Red subpixel cell B' Blue subpixel cell G' Green subpixel cell 2011 Subpixels R (Red subpixel) B Blue subpixel G Green subpixel X 2nd direction Y Third direction 20111 Light-emitting devices 201111 Anode 201112 Emitting layer 201113 Cathode 101 Second base board 102 Drive circuit layer 107 Sealing layer 1071 First inorganic sealing layer 1072 Second inorganic sealing layer 108 Second planarization layer TFT Thin-Film Transistor 1021 Active layer G Gate S Sauce D Drain 103 Buffer Layer 104 Gate Insulation Layer 105 Interlayer insulating layer 106 Third planarization layer 109 Pixel Definition Layer 1091 1st opening area 20112 Color Film r Red color film g Green color film b. Blue color film 111 1st protective layer 116 Light-Concentrating Structure 117 4th planarization layer 20113 Pixel electrode 112 Array substrates 113 Opposing substrate 114 liquid crystal layer 1131 Black Matrix 115 Common electrode 1122 Second protective layer 1123 Third protective layer 501 Lens 5011 First Lens 5012 Second lens

Claims

1. A light field display device, A display panel containing multiple pixels, The image-forming structure located on the light-emitting side of the display panel, The imaging structure includes a transmissive lens structure located on the side facing away from the display panel, The imaging structure is used to image light rays emitted from the display panel, such that the light rays emitted from the display panel form a real image on a first plane, and the first plane is located on the side of the imaging structure that is facing away from the display panel. The aforementioned light field display device is used to enlarge the real image to form a virtual image, so that the pupil of a human eye receives the virtual image, and the virtual image received by the pupil of one eye is formed by light rays emitted from at least two of the pixels.

2. The imaging structure includes a plurality of microlenses arranged in an array, The optical field display device according to claim 1, wherein the multiple microlenses have the same focal length.

3. The optical field display device according to claim 2, wherein the focal point of the transmissive lens structure is located on the first plane.

4. The optical field display device according to claim 3, wherein the display panel includes a plurality of pixels, and the pixels and the microlenses correspond in a one-to-one relationship.

5. The distance H1 between the transmission lens structure and the imaging structure satisfies the following equation: P1 / H1=EB / ER The optical field display device according to claim 4, wherein EB is the eye movement distance, ER is the distance from the human eye to the transparent lens structure, and P1 is the width of the display panel in any direction of eye movement distance.

6. The pixel includes multiple types of subpixel cells, the display panel includes a first light-emitting plane, and the light-emitting colors of the multiple types of subpixel cells in the first light-emitting plane are different. The distance a between the microlens and the first light-emitting plane satisfies the following equation: tan(fov1)=D1 / H1=SS / a The optical field display device according to claim 5, wherein SS is the aperture of the microlens, D1 is the aperture of the transmissive lens structure, and fov1 is the field of view of the microlens.

7. In any direction of eye movement distance, the plurality of pixels are divided into a plurality of pixel rows, each pixel row contains v pixels arranged along the direction of eye movement distance, where v is an integer greater than 2, and the aperture SS of the microlens satisfies the following conditions: SS = P1 / v The optical field display device according to claim 6.

8. The optical field display device according to claim 7, wherein v is 30 or less.

9. The focal length F1 of the aforementioned transmissive lens structure satisfies the following equation: 1 / ER+1 / H1=1 / F1, The optical field display device according to any one of claims 6 to 8.

10. The distance b between the first plane and the microlens satisfies the following equation: b=H1-a-F1, The optical field display device according to claim 9.

11. The optical field display device according to claim 2, wherein the distance between the plurality of microlenses and the transmission lens structure is less than or equal to the focal length of the transmission lens structure.

12. The optical field display device according to claim 11, wherein the display panel includes a plurality of pixel groups, each pixel group includes v pixels, where v is an integer greater than 2, and each pixel group corresponds to each other in a one-to-one relationship with the microlenses.

13. The pixel includes multiple types of subpixel cells, the display panel includes a first light-emitting plane, and the light-emitting colors of the multiple types of subpixel cells in the first light-emitting plane are different. The distance a between the microlens and the first light-emitting plane satisfies the following equation: tan(fov1)=EB / H1=SS / a The optical field display device according to claim 12, wherein fov1 is the field of view of the microlens, EB is the eye movement distance, H1 is the distance between the transmissive lens structure and the microlens, and SS is the aperture of the microlens.

14. The focal length F1 of the aforementioned transmissive lens structure satisfies the following equation: tan(fov2 / 2)=(P1 / 2) / F1 The optical field display device according to claim 13, wherein P1 is the width of the display panel in any direction of eye movement distance, and fov2 is the field of view of the transmissive lens structure.

15. The distance H1 between the microlens and the transmissive lens structure is equal to the focal length F1 of the transmissive lens structure, and the distance between the first light-emitting plane and the microlens is greater than the focal length of the microlens. The distance a between the microlens and the first light-emitting plane satisfies the following equation: tan(fov1)=EB / F1=SS / a The optical field display device according to claim 13 or 14.

16. The optical field display device according to claim 13 or 14, wherein the distance H1 between the microlens and the transmissive lens structure is less than the focal length F1 of the transmissive lens structure, and the distance between the first light-emitting plane and the microlens is greater than the focal length of the microlens.

17. The aperture SS of the aforementioned microlens satisfies the following equation: SS = v × P² The optical field display device according to claim 15 or 16, wherein P2 is the pixel size in any direction of eye movement distance.

18. The distance b between the first plane and the microlens satisfies the following equation: (1 / -L1)+(1 / (F1-b))=1 / F1 The optical field display device according to claim 17, wherein L1 is the distance between the optimal depth of field and the transmissive lens structure.

19. The optical field display device according to any one of claims 2 to 18, wherein the imaging structure further includes a first base substrate located between the plurality of microlenses and the display panel and bonded to the display panel.

20. The optical field display device according to any one of claims 2 to 18, wherein the imaging structure further includes a bonding frame located between the plurality of microlenses and the display panel, and bonded to the display panel in the peripheral region of the display panel.

21. The optical field display device according to any one of claims 2 to 20, wherein the imaging structure further includes a first flat layer of the microlens located on the side facing away from the display panel.

22. The aforementioned microlens is a spherical lens, The light field display device according to any one of claims 2 to 21, wherein the curved region of the spherical lens faces the transmissive lens structure.

23. The microlens includes a stacked first cylindrical lens and a second cylindrical lens, and the extending directions of the first cylindrical lens and the second cylindrical lens intersect. The optical field display device according to any one of claims 2 to 21, wherein the curved regions of the first cylindrical lens and the second cylindrical lens face the transmissive lens structure.

24. The optical field display device according to any one of claims 2 to 23, wherein the transmissive lens structure includes a plurality of lenses, and the plurality of lenses are at least one of a straight lens, a free-form surface lens, and a Fresnel lens.

25. The optical field display device according to any one of claims 2 to 23, wherein the transmitted lens structure is a folded optical path structure.

26. The aforementioned pixel includes a plurality of subpixel cells, and each subpixel cell includes a plurality of subpixels with the same emitted color. The aforementioned subpixel includes a color film, The light field display device according to any one of claims 2 to 25, wherein the light-emitting color of the color film corresponds to the color of the subpixel, and the plane on which the surface of the color film facing the microlens exists is the first light-emitting plane.

27. The light field display device according to claim 26, wherein the subpixel further includes a light-emitting device in which the color film is located on the side facing away from the microlens.

28. The optical field display device according to claim 27, wherein the emission colors of the multiple light-emitting devices included in the display panel are the same.

29. The optical field display device according to claim 27 or 28, wherein the color film extends to a region between adjacent subpixels, and the color films belonging to different subpixel cells and included in two adjacent subpixels are stacked and arranged in the region between the two adjacent subpixels.

30. The aforementioned subpixel further, A thin-film transistor located on the side of the color film facing away from the microlens, The optical field display device according to claim 26, further comprising a pixel electrode located between the thin-film transistor and the color film.

31. The aforementioned pixel includes a plurality of subpixel cells, and each subpixel cell includes a plurality of subpixels with the same emitted color. The subpixel includes a light-emitting device, and in the pixel, the light-emitting color of the light-emitting device included in different types of subpixel cells is different. The light-emitting device includes a light-emitting layer, and the first light-emitting plane is the light-emitting surface of the light-emitting layer, according to any one of claims 2 to 25.

32. The aforementioned display panel further, The light-emitting device is located on the side facing the imaging structure, and on the side of the light-emitting device facing the imaging structure, the sealing layer includes a first inorganic sealing layer and a second inorganic sealing layer that are sequentially stacked, A light field display device according to any one of claims 27 to 29, 31, further comprising: a second planarizing layer located on the side of the second inorganic sealing layer that faces away from the first inorganic sealing layer.

33. The display panel further includes a plurality of light-gathering structures located on the side of the second planarization layer that faces away from the light-emitting device, The optical field display device according to claim 32, wherein the light-collecting structure corresponds one-to-one with the sub-pixels.

34. The optical field display device according to any one of claims 1 to 33, wherein the optical field display device includes two display panels corresponding to the left eye and the right eye, two imaging structures corresponding to the left eye and the right eye, and two transmission lens structures corresponding to the left eye and the right eye, respectively.

35. A wearable device comprising a light field display device according to any one of claims 1 to 34.

Images