Light field display device and wearable equipment

Abstract

A light field display device and a wearable device, the light field display device comprising: a display panel (1) comprising a plurality of pixels (2); the imaging structure (3) is located on the light emitting side of the display panel (1); the imaging structure (3) is used for imaging the light emitted by the display panel (1), so that the light emitted by the display panel (1) forms a real image on the first plane (4); the first plane (4) is located on the side, away from the display panel (1), of the imaging structure (3). The transmission lens structure (5) is located on the side, away from the display panel (1), of the imaging structure (3); the transmission lens structure (5) is used for amplifying the real image to form a virtual image and enabling the pupil of the human eye (6) to receive the virtual image; and a virtual image received by the pupil of a single eye is formed by light rays emitted by at least two pixels (2).

Description

Light field display device and wearable device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular 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. 3D display technology can make the display image three-dimensional and realistic.

[0003] Conventional augmented reality display systems create parallax 3D by giving the left and right eyes images with different parallaxes. However, in this solution, as shown in Figure 1, the human eye relies on the intersection of the light rays from the left and right eyes to induce the human eye to perceive the corresponding depth of field. Therefore, the depth at which the binocular camera induces the monocular focus and the depth at which the monocular image is clearest, namely the binocular convergence depth, are not in the same plane. The human eye will perceive convergence conflict, causing visual fatigue.

[0004] Summary of the Invention

[0005] An embodiment of the present disclosure provides a light field display device, the light field display device comprising:

[0006] a display panel comprising a plurality of pixels;

[0007] An imaging structure is located on the light-emitting side of the display panel; the imaging structure is used to: image the light emitted by the display panel so that the light emitted by the display panel forms a real image on a first plane; the first plane is located on the side of the imaging structure away from the display panel;

[0008] The transmissive lens structure is located on the side of the imaging structure away from the display panel; the transmissive lens structure is used to: magnify the real image to form a virtual image, and allow the human eye pupil to receive the virtual image; the virtual image received by a single eye pupil is formed by light emitted by at least two pixels.

[0009] In some embodiments, the imaging structure includes a plurality of microlenses arranged in an array;

[0010] The focal lengths of the multiple microlenses are the same.

[0011] In some embodiments, the focal point of the transmissive lens structure is located in the first plane.

[0012] In some embodiments, the display panel includes a plurality of pixels; the pixels correspond one-to-one to the microlenses.

[0013] In some embodiments, the distance H1 between the transmissive lens structure and the imaging structure satisfies:

[0014] P1 / H1=EB / ER;

[0015] Wherein, EB is the eye movement distance, ER is the distance between the human eye and the transmission lens structure, and P1 is the width of the display panel in the direction of any eye movement distance.

[0016] In some embodiments, the pixel includes multiple sub-pixel units; the display panel includes a first light emitting plane; the multiple sub-pixel units have different light emitting colors on the first light emitting plane;

[0017] The distance a between the microlens and the first light-emitting plane satisfies:

[0018] Among them, 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.

[0019] In some embodiments, in any eye movement distance direction, a plurality of pixels are divided into a plurality of pixel rows; a pixel row includes v pixels arranged along the eye movement distance direction, where v is an integer greater than 2; and an aperture SS of the microlens satisfies:

[0020] SS=P1 / v.

[0021] In some embodiments, v is less than or equal to 30.

[0022] In some embodiments, the focal length F1 of the transmissive lens structure satisfies:

[0023] In some embodiments, a distance b between the first plane and the microlens satisfies: b=H1-a-F1.

[0024] In some embodiments, the distance between the plurality of microlenses and the transmissive lens structure is less than or equal to the focal length of the transmissive lens structure.

[0025] In some embodiments, the display panel includes a plurality of pixel groups; the pixels include a plurality of sub-pixel units; the display panel includes a first light emitting plane; the plurality of sub-pixel units have different light emitting colors on the first light emitting plane;

[0026] The distance a between the microlens and the first light-emitting plane satisfies:

[0027] Among them, 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.

[0028] In some embodiments, the focal length F1 of the transmissive lens structure satisfies: Wherein, P1 is the width in the direction of any eye movement distance, and fov2 is the field of view angle of the transmission lens structure.

[0029] 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, and the distance between the first light exit plane and the microlens is greater than the focal length of the microlens;

[0030] The distance a between the first light-emitting plane and the microlens satisfies:

[0031] In some embodiments, the distance H1 between the microlens and the transmissive lens structure is smaller than the focal length F1 of the transmissive lens structure, and the distance between the first light exit plane and the microlens is larger than the focal length of the microlens.

[0032] In some embodiments, the aperture SS of the microlens satisfies:

[0033] SS=v×P2, where P2 is the pixel size in any eye movement distance direction.

[0034] In some embodiments, the distance b between the first plane and the microlens satisfies:

[0035] Wherein, L1 is the distance between the optimal depth of field surface and the transmission lens structure.

[0036] In some embodiments, the imaging structure further comprises:

[0037] The first base substrate is located between the plurality of micro lenses and the display panel, and is adhered to the display panel.

[0038] In some embodiments, the imaging structure further comprises:

[0039] The laminating frame is located between the plurality of micro lenses and the display panel and is laminating to the display panel in the peripheral area of ​​the display panel.

[0040] In some embodiments, the imaging structure further comprises:

[0041] The first flat layer is located on a side of the microlens facing away from the display panel.

[0042] In some embodiments, the microlenses are ball lenses;

[0043] The curved area of ​​the ball lens faces the transmissive lens structure.

[0044] In some embodiments, the microlens includes a first cylindrical lens and a second cylindrical lens that are stacked; the first cylindrical lens and the second cylindrical lens extend in directions that intersect;

[0045] The curved surface areas of the first cylindrical lens and the second cylindrical lens face the transmissive lens structure.

[0046] In some embodiments, the transmissive lens structure includes a plurality of lenses; the plurality of lenses are at least one of the following: a straight-through lens, a free-form surface lens, and a Fresnel lens.

[0047] In some embodiments, the transmissive lens structure is a folded optical path structure.

[0048] In some embodiments, a pixel includes a plurality of sub-pixel units, and a sub-pixel unit includes a plurality of sub-pixels with the same light emitting color;

[0049] Sub-pixels include:

[0050] Color filter; the light emitting color of the color filter corresponds to the color of the sub-pixel; the plane where the surface of the color filter facing the microlens is located is the first light emitting plane.

[0051] In some embodiments, the sub-pixel further comprises:

[0052] The light-emitting device is located on the side of the color film away from the microlens.

[0053] In some embodiments, the display panel includes a plurality of light-emitting devices that emit light of the same color.

[0054] In some embodiments, the color filter extends to a region between adjacent sub-pixels; and the color filters included in two adjacent sub-pixels belonging to different sub-pixel units are stacked in the region between the two adjacent sub-pixels.

[0055] In some embodiments, the sub-pixel further comprises:

[0056] Thin film transistor, located on the side of the color film away from the microlens;

[0057] The pixel electrode is located between the thin film transistor and the color filter.

[0058] In some embodiments, a pixel includes a plurality of sub-pixel units, and a sub-pixel unit includes a plurality of sub-pixels with the same light emitting color;

[0059] The sub-pixels include: light-emitting devices; in a pixel, the light-emitting devices included in different sub-pixel units emit different colors;

[0060] The light emitting device includes a light emitting layer, and the first light emitting plane is a light emitting surface of the light emitting layer.

[0061] In some embodiments, the display panel further comprises:

[0062] The encapsulation layer is located on the side of the light-emitting device facing the imaging structure, and includes a first inorganic encapsulation layer and a second inorganic encapsulation layer stacked in sequence on the side of the light-emitting device facing the imaging structure;

[0063] The second planarization layer is located on a side of the second inorganic encapsulation layer facing away from the first inorganic encapsulation layer.

[0064] In some embodiments, the display panel further includes: a plurality of light-concentrating structures located on a side of the second planarization layer facing away from the light-emitting device;

[0065] The light-collecting structures correspond one to one with the sub-pixels.

[0066] In some embodiments, the light field display device includes: two display panels corresponding to the left eye and the right eye respectively, two imaging structures corresponding to the left eye and the right eye respectively, and two transmission lens structures corresponding to the left eye and the right eye respectively.

[0067] A wearable device provided by an embodiment of the present disclosure includes the light field display device provided by an embodiment of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0069] FIG1 is a schematic diagram showing that the binocular convergence depth and the monocular focus depth are not in the same plane in the related art;

[0070] FIG2 is a schematic structural diagram of a display device provided by an embodiment of the present disclosure;

[0071] FIG3 is a schematic diagram of a monocular two-viewpoint back-tracing method according to an embodiment of the present disclosure;

[0072] FIG4 is a schematic structural diagram of another display device provided by an embodiment of the present disclosure;

[0073] FIG5 is a schematic diagram of the structure of a microlens provided in an embodiment of the present disclosure;

[0074] FIG6 is a schematic diagram of pixel arrangement in a display panel provided by an embodiment of the present disclosure;

[0075] FIG7 is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure;

[0076] FIG8 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0077] FIG9 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0078] FIG10 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0079] FIG11 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0080] FIG12 is a schematic diagram of imaging of a display device provided by an embodiment of the present disclosure;

[0081] FIG13 is a schematic diagram of imaging of another display device provided in an embodiment of the present disclosure.

[0082] Reference numerals: display panel 1, pixel 2, imaging structure 3, first plane 4, transmissive lens structure 5, human eye 6, first light exit plane 7, first direction Z, microlens 301, first base substrate 302, first flat layer 304, bonding frame 303, ball lens 3011, first cylindrical lens 3012, second cylindrical lens 3013, Sub-pixel unit 201, red sub-pixel unit R', blue sub-pixel unit B', green sub-pixel unit G', sub-pixel 2011, red sub-pixel R, blue sub-pixel B, green sub-pixel G, second direction X, third direction Y, light-emitting device 20111, anode 201111, light-emitting layer 201112, cathode 201113, second base substrate 101, driving circuit layer 102, encapsulation layer 107, first inorganic encapsulation layer 1071, second inorganic encapsulation layer 1072, second planarization layer 108, thin film transistor TFT, active layer 1021, gate G, source S, Drain D, buffer layer 103, gate insulation layer 104, interlayer insulation layer 105, third planarization layer 106, pixel definition layer 109, first opening area 1091, color filter 20112, red color filter r, green color filter g, blue color filter b, first protective layer 111, focusing structure 116, fourth planarization layer 117, pixel electrode 20113, array substrate 112, opposing substrate 113, liquid crystal layer 114, black matrix 1131, common electrode 115, second protective layer 1122, third protective layer 1123, lens 501, first lens 5011, second lens 5012. DETAILED DESCRIPTION

[0083] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0084] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0085] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0086] An embodiment of the present disclosure provides a light field display device, as shown in FIG2 , comprising:

[0087] A display panel 1 including a plurality of pixels 2;

[0088] An imaging structure 3 is located on the light-emitting side of the display panel 1. The imaging structure 3 is used to image the light emitted by the plurality of pixels 2 so that the light emitted by the display panel 1 forms a real image on a first plane 4. The first plane 4 is located on the side of the imaging structure 3 facing away from the display panel 1.

[0089] The transmissive lens structure 5 is located on the side of the imaging structure 3 away from the display panel 1; the transmissive lens structure 5 is used to: magnify the real image to form a virtual image, and enable the pupil of the human eye 6 to receive the virtual image; the virtual image received by the pupil of a single eye is formed by the light emitted by at least two pixels 2.

[0090] It should be noted that when viewing using the light field display device provided by the embodiment of the present disclosure, as shown in Figure 2, the human eye 6 is on the side of the transmissive lens structure 5 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 in sequence along the first direction Z.

[0091] It should be noted that the light field display device provided in the embodiments of the present disclosure is a three-dimensional (3D) light field display device based on light field display. Light field display can realize true 3D scenes similar to the real world. Generally, a light beam with a known direction is called a light field in space, or simply a light field. In a light field, the light beams entering the pupil need to have an intersection in space to form an image. A pixel represents a light ray and corresponds to a viewpoint. In order to realize light field display, the pupil of a single eye needs to receive at least two viewpoints simultaneously.

[0092] In the light field display device provided by the embodiments of the present disclosure, the virtual image received by a single eye pupil is formed by light emitted by at least two pixels. That is, the single eye pupil simultaneously receives at least two viewpoints. Light emitted by these pixels propagates to the pupil position, forming a viewing area. The transmissive lens structure magnifies the real image to form a virtual image at infinity, making the depth of field of the single eye adjustable. Focusing the human eye lens allows for the transition between clarity and blur at different depths of field, thereby enabling the focus of the single eye and the convergence of both eyes on the same plane, avoiding the perception of convergence conflict and visual fatigue by the human eye. Furthermore, because the imaging structure of the present disclosure first forms a real image on a first plane for light emitted by multiple pixels, and then forms a virtual image at infinity, the spot size of the pixel imaging is smaller, which is beneficial for improving imaging quality.

[0093] In specific implementations, taking the case of a monocular pupil receiving two viewpoints simultaneously, a schematic diagram of the back-tracing of light rays from two viewpoints is shown in Figure 3. Different viewpoints are incident on different positions of the pupil, forming spatial intersections and, in turn, different depths of field. A monocular eye can focus on different depths of field based on different convergence angles, avoiding convergence conflicts between the two eyes. Furthermore, different image rendering can be adjusted based on the focus state of the human eye, enabling switching between different depths of field.

[0094] Next, the composition of the imaging structure, display panel, and transmission lens structure included in the display device provided in the embodiment of the present disclosure is described with examples.

[0095] In some embodiments, as shown in FIG. 2 , the imaging structure 3 includes a plurality of microlenses 301 arranged in an array.

[0096] In some embodiments, the focal lengths of the plurality of microlenses are the same.

[0097] In the light field display device provided by the embodiments of the present disclosure, the multiple microlenses have the same focal length, and the focal points of the multiple microlenses are located in the same plane. This allows light emitted from the display panel to form a real image on the same plane, namely the first plane, thereby reducing the design difficulty of the display device. Furthermore, compared to the case of multi-focal plane imaging with microlenses of different focal lengths, this can avoid affecting the resolution of the display device.

[0098] In some embodiments, as shown in FIG2 , the imaging structure 3 further includes:

[0099] A first base substrate 302 is located between the plurality of micro lenses 301 and the display panel 1;

[0100] The first planar layer 304 is located on a side of the microlens 301 facing away from the display panel 1 .

[0101] In a specific implementation, for example, a plurality of microlenses can be formed on one side of a first base substrate using an injection molding process. The material of the microlenses can be, for example, polyethylene glycol terephthalate (PET). The first base substrate can be, for example, a glass substrate. Alternatively, the material of the first base substrate can also include polymethyl methacrylate (PMMA).

[0102] In a specific implementation, the first planarization layer is used to planarize the plurality of micro lenses. The material of the first planarization layer may be, for example, an organic material, and the organic material may be, for example, organosilicon (OCR).

[0103] In some embodiments, the difference between the refractive index of the microlens and the refractive index of the first flat layer is less than or equal to 0.2, that is, the difference between the refractive index of the microlens and the first flat layer is small, thereby preventing light from being refracted at a large angle.

[0104] In a specific implementation, for example, the refractive index of the microlens is greater than or equal to 1.62 and less than or equal to 1.65. If the refractive index of the microlens is 1.62, the refractive index of the first flat layer is 1.42.

[0105] In some embodiments, as shown in FIG. 2 , the first base substrate 302 is attached to the display panel 1 .

[0106] Alternatively, in some embodiments, as shown in FIG4 , the imaging structure 3 further includes:

[0107] The bonding frame 303 is located between the plurality of micro lenses 301 and the display panel 1 , and is bonded to the display panel 1 .

[0108] That is, the imaging structure is attached to the display panel frame by fitting the frame.

[0109] In a specific implementation, as shown in FIG4 , the laminating frame 303 is located between the first base substrate 302 and the display panel 1, and the laminating frame 303 is laminated to the first base substrate 302 and the display panel 1 at their edges. In area A surrounded by the laminating frame 303, the space between the first base substrate 302 and the display panel 1 is filled with air.

[0110] In some embodiments, as shown in FIG2 and FIG4 , the microlens 301 is a ball lens 3011 ;

[0111] The curved surface area of ​​the ball lens 3011 faces the transmission lens structure 5 .

[0112] Thus, the light emitted from the display panel can be converged, so that the image formed on the first plane by the light emitted from the display panel after passing through the multiple micro lenses is a real image.

[0113] Alternatively, in some embodiments, as shown in FIG5 , the microlens 301 includes a first cylindrical lens 3012 and a second cylindrical lens 3013 that are stacked. The extension directions of the first cylindrical lens 3012 and the second cylindrical lens 3013 intersect, so that the stacked two cylindrical lenses can function as a spherical lens. For example, the extension directions of the first cylindrical lens 3012 and the second cylindrical lens 3013 are perpendicular.

[0114] The curved surface areas of the first cylindrical lens 3012 and the second cylindrical lens 3013 face the transmissive lens structure (not shown).

[0115] Thus, the light emitted from the display panel can be converged, so that the image formed on the first plane by the light emitted from the display panel after passing through the multiple micro lenses is a real image.

[0116] In specific implementations, whether the lamination frame is used to laminate the display panel or the first base substrate is directly laminated to the display panel, optical adhesive can be used to laminate the imaging structure to the display panel. The first base substrate and the lamination frame are both made of, for example, a light-transmitting material. The first base substrate can be, for example, a glass substrate.

[0117] In some embodiments, as shown in FIG6 , the pixel 2 includes multiple sub-pixel units 201 ;

[0118] In a specific implementation, as shown in FIG6 , the pixel 2 includes, for example, three sub-pixel units 201 , which are, for example, a red sub-pixel unit R′, a blue sub-pixel unit B′, and a green sub-pixel unit G′.

[0119] In a specific implementation, as shown in FIG6 , the pixels 2 are arranged in an array along the second direction X and the third direction Y, for example, and the three sub-pixel units 201 are arranged in sequence along the third direction Y, for example.

[0120] In some embodiments, as shown in FIG6 , the sub-pixel unit 201 includes a plurality of sub-pixels 2011 having the same light emitting color.

[0121] In a specific implementation, as shown in FIG6 , the sub-pixel unit 201 includes a plurality of sub-pixels 2011, for example, arranged sequentially along the second direction X. In a specific implementation, the red sub-pixel unit R′ includes a plurality of red sub-pixels R arranged along the second direction X, the blue sub-pixel unit B′ includes a plurality of blue sub-pixels B arranged along the second direction X, and the green sub-pixel unit G′ includes a plurality of green sub-pixels G arranged along the second direction X.

[0122] In a specific implementation, as shown in FIG6 , the sub-pixels 2011 in a row all have the same color in the second direction X. The light field display device provided in the embodiment of the present disclosure has a display panel including multiple groups of pixels, each group of pixels including multiple sub-pixel units of different colors, each sub-pixel unit including multiple sub-pixels of the same color, and a small spacing between adjacent sub-pixels in the second direction X, so that each row of sub-pixels forms a continuous light-emitting surface.

[0123] In some embodiments, the display panel is an electroluminescent display panel.

[0124] In some embodiments, when the display panel is an electroluminescent display panel, as shown in FIG. 7 , the sub-pixel 2011 includes a light-emitting device 20111 .

[0125] In a specific implementation, the light-emitting device may be, for example, an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a micro inorganic light-emitting diode (micro LED), or a mini light-emitting diode (mini LED). That is, the electroluminescent display panel may be, for example, an organic light-emitting diode (OLED) display panel, a quantum dot light-emitting diode (QLED) display panel, a micro inorganic light-emitting diode (micro LED) display panel, or a mini light-emitting diode (mini LED) display panel.

[0126] In a specific implementation, as shown in FIG7 , the light-emitting device 20111 includes an anode 201111 , a light-emitting layer 201112 , and a cathode 201113 that are stacked.

[0127] In specific implementations, 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.

[0128] In some embodiments, as shown in FIG7 , the display panel 1 further includes:

[0129] A second substrate 101;

[0130] The driving circuit layer 102 is located between the second base substrate 101 and the light emitting device 20111;

[0131] The encapsulation layer 107 is located on the side of the light-emitting device 20111 facing the imaging structure (not shown), that is, on the side of the light-emitting device 20111 facing away from the second substrate 101, and includes a first inorganic encapsulation layer 1071 and a second inorganic encapsulation layer 1072 stacked in sequence on the side of the light-emitting device 20111 facing the imaging structure (that is, the side of the light-emitting device 20111 facing away from the second substrate 101);

[0132] The second planarization layer 108 is located on a side of the second inorganic encapsulation layer 1072 facing away from the first inorganic encapsulation layer 1071 .

[0133] In a specific implementation, the encapsulation layer is used to protect the light emitting device to prevent water and oxygen from corroding the light emitting layer of the light emitting device. The material of the first inorganic encapsulation layer is, for example, silicon nitride, and the material of the second inorganic encapsulation layer is, for example, aluminum oxide.

[0134] In a specific implementation, taking an OLED display panel as an example, as shown in FIG7 , the driving circuit layer 102 includes, for example, a thin-film transistor (TFT), and may also 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 a specific implementation, the thin-film transistors included in the driving circuit layer include at least a driving transistor, 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 electrodes may include, for example, metal materials.

[0135] In a specific implementation, as shown in FIG7 , the thin film transistor TFT has a top gate structure, that is, the gate G is located on the side of the active layer 1021 away from the second base substrate 101; the display panel 1 also 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.

[0136] In a specific implementation, taking an OLED display panel as an example, as shown in FIG7 , the display panel further includes a pixel definition layer 109 located on a side of the third planarization layer 106 facing away from the second base substrate 101. The pixel definition layer 109 has a first opening region 1091. The pixel definition layer 109 covers the edge of the anode 201111. The orthographic projection of the first opening region 1091 on the second base substrate 101 falls within the anode 201111. The anode 201111, the light-emitting layer 201112, the cathode 201113, and the first opening region 1091 are stacked to form a light-emitting device.

[0137] In some embodiments, within a pixel, the light-emitting devices corresponding to the sub-pixels in different sub-pixel units emit different colors. The color of the light-emitting device corresponds to the color of the light emitted by the sub-pixel in which the light-emitting device is located. The light-emitting device included in a red sub-pixel emits red light, the light-emitting device included in a blue sub-pixel emits blue light, and the light-emitting device included in a green sub-pixel emits green light.

[0138] Alternatively, in some embodiments, as shown in FIG8 , the sub-pixel 2011 further includes: a color filter 20112 .

[0139] In a specific implementation, for an electroluminescent display panel, the color filter is located on the side of the light emitting device away from the second substrate. As shown in FIG8 , when the display panel includes an encapsulation layer 107 , the color filter 20112 is located on the side of the encapsulation layer 107 away from the light emitting device 20111 .

[0140] In a specific implementation, the subpixels of different subpixel units correspond to color filters of different colors. The light-emitting color of the color filter corresponds to the light-emitting color of the subpixel in which the color filter is located. The red subpixel includes a red color filter, the blue subpixel includes a blue color filter, and the green subpixel includes a green color filter.

[0141] In a specific implementation, the light-emitting devices included in each sub-pixel of the display panel have the same color. Color conversion is achieved through a color filter to achieve full-color display. For example, the light-emitting devices included in each sub-pixel of the display panel emit white light. Alternatively, the light-emitting devices included in each sub-pixel of the display panel can emit blue light.

[0142] Of course, in specific implementation, the light emitting devices corresponding to the sub-pixels of different sub-pixel units may emit different colors, and the color filter may be used to improve the color purity. In each sub-pixel, the light emitting device emits the same color as the light emitted by the color filter.

[0143] In some embodiments, as shown in FIG. 9 , the color filter 20112 extends to the region between adjacent sub-pixels 2011 ; the color filters 20112 included in two adjacent sub-pixels 2011 belonging to different sub-pixel units 201 are stacked in the region between the two adjacent sub-pixels 2011 .

[0144] It should be noted that FIG9 only shows the red sub-pixel R and the green sub-pixel G. The red color filter r included in the red sub-pixel R overlaps with the green color filter g included in the green sub-pixel G in the region between the red sub-pixel R and the green sub-pixel G. The red color filter r included in the red sub-pixel R overlaps with the blue color filter b included in the blue sub-pixel (not shown) in the region between the red sub-pixel R and the blue sub-pixel (not shown). The green color filter g included in the green sub-pixel G overlaps with the blue color filter b included in the blue sub-pixel (not shown) in the region between the green sub-pixel G and the blue sub-pixel (not shown).

[0145] In the display device provided by the embodiments of the present disclosure, color filters included in two adjacent sub-pixels belonging to different sub-pixel units are stacked in the region between the two adjacent sub-pixels. The two stacked color filters can block light emitted from the sub-pixel region, eliminating the need for a black matrix to prevent crosstalk between adjacent sub-pixel units. This can avoid a decrease in sub-pixel aperture ratio caused by the provision of a black matrix, thereby improving display quality.

[0146] In some embodiments, as shown in FIG. 9 , the display panel further includes a first protective layer 111 covering the color film 20112 .

[0147] In some embodiments, as shown in FIG10 , the display panel 1 further includes: a plurality of light-concentrating structures 116 located on a side of the second planarization layer 108 away from the light-emitting device 20111 ;

[0148] The light-focusing structures 116 correspond to the sub-pixels 2011 in a one-to-one manner.

[0149] In a specific implementation, the light-concentrating structure covers the sub-pixel light-emitting area within the orthographic projection of the first base substrate.

[0150] It should be noted that FIG10 illustrates a display panel including a color filter 20112, with the light-concentrating structure 116 located on the side of the first protective layer 111 facing away from the color filter 20112. If the display panel does not include a color filter, the light-concentrating structure 116 is located on the side of the second planarization layer 108 facing away from the light-emitting device 20111. In some embodiments, as shown in FIG10 , the display panel further includes a fourth planarization layer 117 located on the side of the light-concentrating structure 116 facing away from the second planarization layer 108.

[0151] In the display device provided by the embodiment of the present disclosure, the display panel includes a light-collecting structure, so that the light emitted by the light-emitting device can be concentrated, which is beneficial to improving the light utilization rate.

[0152] In a specific implementation, the light-collecting structure is a micro-lens, which is, for example, a spherical lens, and the curved surface of the spherical lens is away from the first substrate, so as to converge the light.

[0153] Alternatively, in some embodiments, the display panel may also be a liquid crystal display panel (LCD).

[0154] In some embodiments, as shown in FIG11 , the sub-pixel 2011 includes:

[0155] Color filter 20112; the light emitting color of color filter 20112 corresponds to the color of sub-pixel 2011;

[0156] Thin film transistor (TFT), located on the side of the color film 20112 facing away from the microlens (not shown);

[0157] The pixel electrode 20113 is located between the thin film transistor TFT and the color film 20112.

[0158] In a specific implementation, when the display panel is a liquid crystal display panel, as shown in FIG11 , the display panel specifically includes: an array substrate 112 and an opposing substrate 113 disposed opposite each other, and a liquid crystal layer 114 located between the array substrate 112 and the opposing substrate 113. The array substrate 112 includes thin-film transistors (TFTs) and pixel electrodes 20113; the opposing substrate 113 includes a color filter 20112. The array substrate 112 also includes a second base substrate 101, with the thin-film transistors (TFTs) located between the second base substrate 101 and the pixel electrodes 20113; the opposing substrate 113 also includes a third base substrate 1132, and a black matrix 1131 located on the side of the third base substrate 1132 facing the liquid crystal layer 114. The black matrix 1131 includes a second opening, corresponding to the opening area of ​​the sub-pixels 2011. The color filter 20112 includes a portion located within the second opening. FIG11 illustrates the common electrode 115 located on the array substrate 112. Of course, the common electrode 115 may also be located on the opposing substrate 113.

[0159] In a specific implementation, as shown in FIG11 , the thin film transistor TFT has a top gate structure, that is, the gate G is located on the side of the active layer 1021 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, and 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 11, and a third protective layer 1123 located between the common electrode 11 and the liquid crystal layer 114.

[0160] In some embodiments, when the display panel is a liquid crystal display panel, the display device further comprises: a backlight module located on a side of the display panel away from the imaging structure. The backlight module comprises a backlight source, which is, for example, an electroluminescent device.

[0161] In some embodiments, as shown in FIG. 2 and FIG. 4 , the transmissive lens structure 5 includes a plurality of lenses 501 ; the plurality of lenses 501 are at least one of the following: a straight-through lens, a free-form surface lens, and a Fresnel lens.

[0162] It should be noted that, in FIG2 and FIG4 , the distance is described by taking the transmission lens structure 5 including two lenses 501 as an example. The two lenses 501 are respectively a first lens 5011 and a second lens 5012 , and the second lens 5012 is located between the first lens 5011 and the imaging structure 3 .

[0163] In a specific implementation, the first lens may be made of EP8000 material, for example, having a refractive index of 1.661 and an Abbe number of 20.53. The second lens may be made of K26R material, for example, having a refractive index of 1.535 and an Abbe number of 55.634. The parameters of the lens 501 shown in FIG4 are 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.

[0164] Of course, in specific implementations, the transmission lens structure may also include more lenses.

[0165] Alternatively, in some embodiments, the transmission lens structure includes a folded optical path (Pancake) structure. It should be noted that, for example, the Pancake includes: a semi-transparent and semi-reflective mirror, a 1 / 4 phase delay plate, and a reflective polarizer. The Pancake optical solution design is based on the principle of polarized light, utilizing the characteristics of the reflective polarizer that selectively reflects and projects light of different polarizations, and cooperates with the 1 / 4 phase delay plate to adjust the polarization shape, so as to achieve back and forth reflection of light between the semi-transparent and semi-reflective mirror and the reflective polarizer, and finally transmit out from the reflective polarizer. After passing through the 1 / 4 phase delay plate, the circularly polarized light becomes linearly polarized light and reaches the reflective polarizer and is reflected. Then, it passes through the 1 / 4 phase delay plate for the second time and becomes circularly polarized light, which is reflected by the semi-transparent and semi-reflective mirror and passes through the 1 / 4 phase delay plate for the third time, becoming linearly polarized light again. Because the light is rotated 90° compared to the first time, it can pass through the reflective polarizer to complete imaging.

[0166] Alternatively, in a specific implementation, the transmissive lens structure may also include a combination of a lens and a pancake.

[0167] In a specific implementation, the display device further includes an assembly frame for mechanically assembling the transmissive lens structure and the imaging structure so that the distance between the imaging structure and the transmissive lens structure meets the requirements.

[0168] It should be noted that the display device needs to store preset light field mapping rules that match the various parameters of the display device, so that the display panel display image corresponding to the 3D image to be displayed can be obtained. For example, in a specific implementation, a light field database is established based on the coordinate information of the transmission lens structure, the imaging structure, and the coordinate information of the display panel pixels to obtain light field information matching the display device, wherein one pixel represents a ray, and one ray corresponds to one viewpoint. When determining the display panel display image corresponding to the 3D image to be displayed, the depth of field plane to be displayed and the light field of the space are intersected in combination with the light field information database, and the pixels on the display panel are determined according to the mapping relationship to obtain a light field rendering image of the depth of field plane. The rendered light field images of each depth of field plane are superimposed together, and the corresponding display information is given to drive the pixels to emit light. In this way, through the imaging structure and the transmission lens structure, a 3D scene that can be viewed by the human eye with adjustable focus, just like the real world, can be restored.

[0169] Next, the conditions that need to be satisfied between the imaging structure, the transmission lens structure, and the display panel included in the display device, as well as the relevant parameters of each structure are described with examples.

[0170] During specific implementation, for example, the position of the first plane may be selected based on imaging quality and the size of the display device.

[0171] In some embodiments, as shown in FIG12 , the focal point of the transmissive lens structure 5 is located on the first plane 4 . That is, the distance between the transmissive lens structure 5 and the first plane 4 is the focal length F1 of the transmissive lens structure 5 .

[0172] In the display device provided by the embodiment of the present disclosure, the focus of the transmissive lens structure is located on the first plane. Thus, the transmissive lens structure magnifies the real image formed on the first plane to form a virtual image with better imaging effect, which is conducive to improving the imaging quality and further improving the display effect.

[0173] 12 , line segments are used to replace the transmissive lens structure 5, the imaging structure 3, and the first light emitting plane 7. The first light emitting plane is the surface of the pixel with different sub-pixel units that emit light of different colors that is farthest from the imaging structure.

[0174] In a specific implementation, when the display panel includes a color filter, the plane on which the surface of the color filter facing the imaging structure lies is the first light-emitting plane. In a specific implementation, when the display panel includes a light-emitting device but does not include a color filter, the first light-emitting plane is the plane on which the light-emitting surface of the light-emitting layer lies.

[0175] In some embodiments, when the focus of the transmissive lens structure is located at the first plane, the pixels correspond to the microlenses one-to-one.

[0176] In specific implementations, pixels correspond one to one with microlenses, with a single microlens responsible for the entire image from a single viewpoint. In the direction of eye movement distance, all pixels on the display panel are designed to be projected within the eye movement distance.

[0177] In some embodiments, in any eye movement distance direction, the plurality of pixels are divided into a plurality of pixel rows; a pixel row includes v pixels arranged along the eye movement distance, where v is an integer greater than or equal to 2.

[0178] It should be noted that the direction of the eye movement distance is the second direction or the 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; pixel row 2-1 includes v pixels 2 arranged along the second direction X, where v is an integer greater than or equal to 2. This allows a single eye pupil to receive at least two viewpoints. Figure 6 only shows two pixels 2 in one pixel row 2-1. Multiple pixel rows 2-1 extend along the second direction X and are arranged along the third direction Y.

[0179] In some embodiments, v is less than or equal to 30.

[0180] Furthermore, in order to achieve multi-viewpoint display to improve display effects, v may be selected to be greater than or equal to 4 and less than or equal to 30.

[0181] Since microlenses correspond one-to-one to pixels, in some embodiments, the aperture SS of the microlens satisfies:

[0182] SS=P1 / v, where P1 is the width of the display panel in any eye movement distance direction.

[0183] It should be noted that the eye movement distance is typically the same width in the second and third directions. Alternatively, the display panel may have the same width in the second and third directions, the pixels may have the same width in the second and third directions, the transmissive lens structure may have the same aperture in the second and third directions, and the microlenses may have the same aperture in the second and third directions. Figure 12 illustrates the eye movement distance in the second direction X as an example. For example, P1 is the width of the display panel 1 in the second direction X.

[0184] In some embodiments, if P1 = 0.9 inches = 16.128 millimeters (mm), v is greater than or equal to 4 and less than or equal to 30, then SS is greater than or equal to 4.032 mm and less than or equal to 0.5376 mm.

[0185] In some embodiments, as shown in FIG12 , the distance H1 between the transmissive lens structure 5 and the imaging structure 3 satisfies:

[0186] P1 / H1=EB / ER;

[0187] Wherein, EB is the eye movement distance, and ER is the distance between the human eye and the transmission lens structure 5.

[0188] In some embodiments, if P1=0.9 inches=16.128 millimeters (mm), EB is greater than or equal to 4 mm and less than or equal to 6 mm, ER is greater than or equal to 15 and less than or equal to 25 mm, and H1 is greater than or equal to 50 mm and less than or equal to 84 mm.

[0189] During implementation, the aperture D1 of the transmissive lens structure can be designed based on the desired field of view (FOV2). The aperture D1 of the transmissive lens structure is defined as its width in the second and third directions (Y). For a 0.9-inch display panel with a resolution of 3840 pixels, the FOV2 required to achieve a 1-arc-minute resolution at 3840 pixels is 42°. For example, if EB = 5mm and ER = 25mm, D1 is greater than or equal to 27.85mm and less than or equal to 50mm.

[0190] In a specific implementation, if EB=5 mm and ER=25 mm, for a 0.9-inch display panel, H1=80.64 mm.

[0191] In some embodiments, as shown in FIG12 , the distance a between the microlens 301 and the first light exit plane 7 included in the display panel 1 satisfies:

[0192] Here, fov1 is the field of view of the microlens 301 .

[0193] In some embodiments, if P1 = 0.9 inches = 16.128 millimeters (mm), D1 is greater than or equal to 27.85 mm and less than or equal to 50 mm, H1 is greater than or equal to 50 mm and less than or equal to 84 mm, and SS is greater than or equal to 4.032 mm and less than or equal to 0.5376 mm, then a is greater than or equal to 10.2 mm and less than or equal to 4.41 mm.

[0194] In some embodiments, the focal length F1 of the transmissive lens structure 5 satisfies:

[0195] In a specific implementation, for a 0.9-inch display panel, if v=4, then a=10.2 mm, H1=80.64 mm, and F1=18.451.

[0196] In some embodiments, as shown in FIG. 12 , the distance b between the first plane 4 and the microlens 301 satisfies: b=H1-a-F1.

[0197] In a specific implementation, for a 0.9-inch display panel, if v=4, then a=10.2 mm, H1=80.64 mm, F1=18.451, and b=51.99 mm.

[0198] In specific implementation, a is the object distance of the microlens imaging, b is the image distance of the microlens imaging, and a, b and the focal length F2 of the microlens satisfy the imaging relationship: Therefore, F2=8.53mm.

[0199] In some embodiments, if the refractive index of the microlens is greater than or equal to 1.62 and less than or equal to 1.65, the refractive index of the first planarization layer is 1.42. To meet the requirements for parameters such as the focal length of the microlens, for example, the radius of curvature of the microlens is 1.705. In specific implementations, the microlens must meet the required eye angle and have a certain shrinkage rate. The microlens has an aperture of 3.371 mm and a dome height of 1.446 mm.

[0200] Of course, in specific implementation, the first plane may also be located at other positions.

[0201] In some embodiments, as shown in FIG. 13 , a distance H1 between the microlens array 301 and the transmissive lens structure 5 is less than or equal to the focal length of the transmissive lens structure 5 .

[0202] In the display device provided by the embodiment of the present disclosure, the distance between the microlens array and the transmissive lens structure is less than or equal to the focal length of the transmissive lens structure. This distance between the microlens array and the transmissive lens structure can be reduced while ensuring a certain imaging quality, thereby reducing the volume of the display device.

[0203] 13 , line segments are used to replace the transmissive lens structure 5, the imaging structure 3, and the first light emitting plane 7. The first light emitting plane is the surface of the pixel with different sub-pixel units that are farthest from the imaging structure.

[0204] In a specific implementation, when the display panel includes a color filter, the plane on which the surface of the color filter facing the imaging structure lies is the first light-emitting plane. In a specific implementation, when the display panel includes a light-emitting device but does not include a color filter, the first light-emitting plane is the plane on which the light-emitting surface of the light-emitting layer lies.

[0205] In some embodiments, the display panel includes a plurality of pixel groups; a pixel group includes v pixels, where v is an integer greater than 2; and a pixel group corresponds to a microlens one-to-one, that is, one microlens corresponds to a plurality of pixels.

[0206] In a specific implementation, one microlens corresponds to multiple pixels, and different microlenses are responsible for the entire picture of a single viewpoint, that is, the resolution at a single viewpoint is equal to the number of microlenses.

[0207] In some embodiments, v is less than or equal to 30.

[0208] Furthermore, in order to achieve multi-viewpoint display to improve display effects, v may be selected to be greater than or equal to 4 and less than or equal to 30.

[0209] Since one microlens corresponds to multiple pixels, in some embodiments, the aperture SS of the microlens satisfies:

[0210] SS=v×P2, where P2 is the pixel size.

[0211] It should be noted that the pixel size is the width of the pixel in the second direction or the third direction. Usually, the width of the pixel in the second direction is equal to the width of the pixel in the third direction.

[0212] During specific implementation, the focal length of the transmission lens structure may be designed according to the required eye-viewing angle of the transmission lens structure.

[0213] In some embodiments, the focal length F1 of the transmissive lens structure satisfies: Wherein, P1 is the width in any eye movement distance direction, and fov2 is the field of view angle of the transmission lens structure 5 .

[0214] In a specific implementation, for a 0.9-inch display panel, to achieve a 42° fov2 entering the eye, the focal length of the eyepiece F1 = 20.8 mm.

[0215] During implementation, the aperture D1 of the transmissive lens structure can be designed based on the desired field of view (FOV2). The aperture D1 of the transmissive lens structure is defined as its width in the second and third directions (Y). For a 0.9-inch display panel with a resolution of 3840 pixels, the FOV2 required to achieve a 1-arc-minute resolution at 3840 pixels is 42°. For example, if EB = 5mm and ER = 25mm, D1 is greater than or equal to 27.85mm and less than or equal to 50mm.

[0216] In some embodiments, the distance b between the first plane and the microlens satisfies:

[0217] Wherein, L1 is the distance between the optimal depth of field surface and the transmission lens structure.

[0218] In specific implementation, considering the range of the comfortable depth of field for human eye fusion, the preferred optimal imaging depth of field L1 is 1000 mm. When F1 = 20.8 mm, b = 0.42 mm.

[0219] In a specific implementation, the pixels corresponding to a single microlens should cover the entire eye movement distance EB.

[0220] In some embodiments, the distance a between the first light exit plane and the microlens 301 satisfies:

[0221] Wherein, EB is the eye movement distance, H1 is the distance between the transmission lens structure and the imaging structure, SS is the aperture of the microlens, and fov1 is the field of view angle of the microlens 301.

[0222] 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, and the distance between the first light exit plane and the microlens is greater than the focal length of the microlens;

[0223] The distance a between the first light exit plane and the microlens 301 satisfies:

[0224] In a specific implementation, taking one microlens corresponding to four pixels as an example, for a 0.9-inch display panel with a resolution of 3840×3840, the pixel size P2 is 4.2 microns × 4.2 microns, and the pixel aperture is 30%. Accordingly, SS = 0.016mm. When EB = 5mm and F1 = 20.8mm, a = 0.07mm.

[0225] In specific implementation, a is the object distance of the microlens imaging, b is the image distance of the microlens imaging, and a, b and the focal length F2 of the microlens satisfy the imaging relationship: Therefore F2 = 0.06 mm.

[0226] In some embodiments, the distance between the microlens and the transmissive lens structure is smaller than the focal length of the transmissive lens structure, and the distance between the first light exit plane and the microlens is larger than the focal length of the microlens.

[0227] In some embodiments, the light field display device includes: two display panels corresponding to the left eye and the right eye respectively, two imaging structures corresponding to the left eye and the right eye respectively, and two transmission lens structures corresponding to the left eye and the right eye respectively.

[0228] During specific implementation, the two display panels display the same image.

[0229] In a specific implementation, the two display panels have the same composition, size, and other parameters, the two imaging structures have the same composition, size, and other parameters, and the two transmissive lens structures have the same composition, size, and other parameters. The positional relationship between the display panel and the imaging structure and transmissive lens structure corresponding to the left eye is the same as the positional relationship between the display panel and the imaging structure and transmissive lens structure corresponding to the right eye.

[0230] A wearable device provided by an embodiment of the present disclosure includes the light field display device provided by an embodiment of the present disclosure.

[0231] In a specific implementation, the transmissive lens structure is used as an eyepiece of a wearable device, for example.

[0232] The wearable device provided in the embodiments of the present disclosure is any wearable product or component with a display function, such as a wearable helmet or wearable glasses. The other essential components of the wearable device are well understood by those skilled in the art and are not described here in detail, nor should they be construed as limitations of the present disclosure. The implementation of the wearable device can be found in the aforementioned embodiments of the light field display device, and any repetitive details will not be repeated.

[0233] In summary, in the light field display device provided by the embodiments of the present disclosure, the virtual image received by a single eye pupil is formed by light emitted by at least two pixels. That is, the single eye pupil simultaneously receives at least two viewpoints. Light emitted by these pixels propagates to the pupil position, forming a viewing area. The transmissive lens structure magnifies the real image to form a virtual image at infinity, making the depth of field of the single eye adjustable. Focusing the human eye lens allows for the transition between clarity and blur at different depths of field, thereby enabling the focus of the single eye and the convergence of both eyes on the same plane, avoiding the perception of convergence conflict and visual fatigue by the human eye. Furthermore, because the present disclosure first forms a real image on a first plane for the light emitted by multiple pixels through the imaging structure, and then forms a virtual image at infinity, the spot size of the pixel imaging is smaller, which is beneficial for improving imaging quality.

[0234] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0235] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such changes and modifications of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A light field display device, wherein: The light field display device comprises: A display panel including a plurality of pixels; An imaging structure, located on the light-emitting side of the display panel; the imaging structure is used to: image the light emitted by the display panel so that the light emitted by the display panel forms a real image on a first plane; the first plane is located on a side of the imaging structure away from the display panel; A transmissive lens structure is located on a side of the imaging structure away from the display panel; the transmissive lens structure is used to: magnify the real image to form a virtual image, and allow the pupil of a human eye to receive the virtual image; the virtual image received by a single eye pupil is formed by light emitted by at least two pixels.

2. The light field display device according to claim 1, wherein: The imaging structure includes a plurality of micro lenses arranged in an array; The focal lengths of the plurality of microlenses are the same.

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

4. The light field display device according to claim 3, wherein: The display panel includes a plurality of pixels; the pixels correspond to the micro lenses one by one.

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

6. The light field display device according to claim 5, wherein: The pixel includes a plurality of sub-pixel units; the display panel includes a first light emitting plane; the plurality of sub-pixel units have different light emitting colors on the first light emitting plane; The distance a between the microlens and the first light emitting plane satisfies: Among them, 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.

7. The light field display device according to claim 6, wherein: In any eye movement distance direction, the multiple pixels are divided into multiple pixel rows; the pixel row includes v pixels arranged along the eye movement distance direction, where v is an integer greater than 2; the aperture SS of the microlens satisfies: SS=P1 / v.

8. The light field display device according to claim 7, wherein: v is less than or equal to 30.

9. The light field display device according to any one of claims 6 to 8, wherein: The focal length F1 of the transmission lens structure satisfies:

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

11. The light field display device according to claim 2, wherein: The distance between the plurality of micro lenses and the transmissive lens structure is less than or equal to the focal length of the transmissive lens structure.

12. The light field display device according to claim 11, wherein: The display panel includes a plurality of pixel groups; the pixel groups include v pixels, where v is an integer greater than 2; and the pixel groups correspond to the microlenses one by one.

13. The light field display device according to claim 12, wherein: The pixel includes a plurality of sub-pixel units; the display panel includes a first light emitting plane; the plurality of sub-pixel units have different light emitting colors on the first light emitting plane; The distance a between the microlens and the first light emitting plane satisfies: Among them, fov1 is the field of view of the microlens, EB is the eye movement distance, H1 is the distance between the transmission lens structure and the microlens, and SS is the aperture of the microlens.

14. The light field display device according to claim 13, wherein: The focal length F1 of the transmission lens structure satisfies: Wherein, P1 is the width of the display panel in any direction of the eye movement distance, and fov2 is the field of view of the transmission lens structure.

15. The light field display device according to claim 13 or 14, wherein: 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 exit 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:

16. The light field display device according to claim 13 or 14, wherein: A distance H1 between the microlens and the transmissive lens structure is smaller than a focal length F1 of the transmissive lens structure, and a distance between the first light exiting plane and the microlens is larger than a focal length of the microlens.

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

18. The light field display device according to claim 17, wherein: The distance b between the first plane and the microlens satisfies: Wherein, L1 is the distance between the optimal depth of field surface and the transmission lens structure.

19. The light field display device according to any one of claims 2 to 18, wherein: The imaging structure further comprises: The first base substrate is located between the plurality of micro lenses and the display panel, and is bonded to the display panel.

20. The light field display device according to any one of claims 2 to 18, wherein: The imaging structure further comprises: The laminating frame is located between the plurality of micro lenses and the display panel and is laminating to the display panel in a peripheral area of ​​the display panel.

21. The light field display device according to any one of claims 2 to 20, wherein: The imaging structure further comprises: The first flat layer is located at a side of the microlens facing away from the display panel.

22. The light field display device according to any one of claims 2 to 21, wherein: The microlens is a ball lens; The curved surface area of ​​the ball lens faces the transmission lens structure.

23. The light field display device according to any one of claims 2 to 21, wherein: The microlens comprises a first cylindrical lens and a second cylindrical lens which are stacked; the extension directions of the first cylindrical lens and the second cylindrical lens intersect; The curved surface areas of the first cylindrical lens and the second cylindrical lens face the transmission lens structure.

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

25. The light field display device according to any one of claims 2 to 23, wherein: The transmission lens structure is a folded light path structure.

26. The light field display device according to any one of claims 2 to 25, wherein: The pixel includes a plurality of sub-pixel units, and the sub-pixel unit includes a plurality of sub-pixels with the same light emission color; The sub-pixel comprises: Color film; the light emitting color of the color film corresponds to the color of the sub-pixel; the plane where the surface of the color film facing the microlens is located is the first light emitting plane.

27. The light field display device according to claim 26, wherein: The sub-pixel further includes: The light emitting device is located on the side of the color film away from the micro lens.

28. The light field display device according to claim 27, wherein: The light emitting devices included in the display panel emit light of the same color.

29. The light field display device according to claim 27 or 28, wherein: The color filter extends to the area between the adjacent sub-pixels; the color filters included in two adjacent sub-pixels belonging to different sub-pixel units are stacked in the area between the two adjacent sub-pixels.

30. The light field display device according to claim 26, wherein: The sub-pixel further includes: A thin film transistor, located on a side of the color film away from the microlens; The pixel electrode is located between the thin film transistor and the color film.

31. The light field display device according to any one of claims 2 to 25, wherein: The pixel includes a plurality of sub-pixel units, and the sub-pixel unit includes a plurality of sub-pixels with the same light emission color; The sub-pixel comprises: a light-emitting device; in the pixel, the light-emitting devices included in different types of the sub-pixel units emit different colors of light; The light emitting device comprises a light emitting layer, and the first light emitting plane is a light emitting surface of the light emitting layer.

32. The light field display device according to any one of claims 27 to 29 and 31, wherein: The display panel further includes: An encapsulation layer, located on a side of the light-emitting device facing the imaging structure, comprising a first inorganic encapsulation layer and a second inorganic encapsulation layer sequentially stacked on the side of the light-emitting device facing the imaging structure; The second planarization layer is located on a side of the second inorganic encapsulation layer away from the first inorganic encapsulation layer.

33. The light field display device according to claim 32, wherein: The display panel further comprises: a plurality of light-collecting structures located on a side of the second planarization layer away from the light-emitting device; The light-condensing structures correspond to the sub-pixels one by one.

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

35. A wearable device, wherein: It comprises the light field display device according to any one of claims 1 to 34.

Images