Stereoscopic display device and composite optical film

Abstract

The disclosure provides a stereoscopic display device and a composite optical film material, and belongs to the technical field of stereoscopic display. The composite optical film material is used for being attached to the light emitting surface of a flat panel display panel, and comprises a taking image layer, a light transmitting medium layer and a stereoscopic grating layer which are sequentially stacked. The taking image layer comprises taking image columnar lenses which are sequentially arranged and correspond to pixel combinations of the flat panel display panel one by one. The taking image layer is used for imaging the pixel image displayed by each pixel combination on a real image plane to form a real image on the real image plane. The real image plane is located in the light transmitting medium layer. The stereoscopic grating layer is used for projecting the real image on the real image plane to an external space to realize stereoscopic display. The composite optical film material can improve the field of view width at a viewing distance.

Description

Technical Field

[0001] This disclosure relates to the field of stereoscopic display technology, and more specifically, to a stereoscopic display device and a composite optical film. Background Technology

[0002] Current glasses-free 3D display devices primarily employ either stereoscopic or multiscopic parallax technology. Stereoscopic 3D devices use two images with parallax, processed with specific pixel filling techniques, and then project the light emitted from the corresponding pixels of each image onto specific areas in space using a specialized grating device. When both eyes are in the correct area, a stereoscopic effect is perceived. Similarly, multiscopic 3D display devices use multiple images with parallax, processed with specific pixel filling techniques, and then project the light emitted from the corresponding pixels of each image onto specific areas in space using a specialized grating device. When both eyes are in the correct area, a stereoscopic effect is perceived. Furthermore, because it involves multiple views, the viewer has a certain degree of spatial movement redundancy, resulting in a more comfortable viewing experience.

[0003] To achieve a larger stereoscopic viewing area, some existing technologies combine viewpoint tracking with binocular 3D technology. By tracking the viewer's eye position, the pixel fill of the stereoscopic image or the phase of the grating device is adjusted in real time to achieve a larger viewing area. However, this method currently only supports a single user. Other existing technologies add more images from different viewpoints, but with an increased number of images, the resolution decreases exponentially given a fixed number of pixels on the screen. Furthermore, more images require grating devices with larger unit widths, resulting in a grainier image.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a stereoscopic display device and a composite optical film to improve the field of view at viewing distances.

[0006] According to one aspect of this disclosure, a composite optical film is provided for attachment to the light-emitting surface of a flat panel display panel, the composite optical film comprising an image-capturing layer, a light-transmitting medium layer and a three-dimensional grating layer stacked sequentially.

[0007] The image-capturing layer includes sequentially arranged image-capturing cylindrical lenses that correspond one-to-one with the pixel combinations of the flat panel display; the image-capturing layer is used to image the pixel images displayed by each pixel combination onto the real image plane to form a real image on the real image plane; the real image plane is located within the light-transmitting medium layer;

[0008] The stereo grating layer is used to project the real image of the real image plane into the external space to achieve stereoscopic display.

[0009] According to one embodiment of this disclosure, the real image plane is located at twice the focal plane of the image-taking layer.

[0010] According to one embodiment of the present disclosure, the stereo grating layer includes a plurality of light guide lenses arranged in sequence, wherein the focal plane of the light guide lenses coincides with the real image plane.

[0011] According to one embodiment of this disclosure, the light guide lens and the image capturing lens are arranged in a one-to-one correspondence; the width of the light guide lens is smaller than the width of the image capturing lens, but larger than 0.95 times the width of the image capturing lens.

[0012] According to one embodiment of this disclosure, the width WB of the light guide lens is:

[0013] WB = WA * DD / (DD + DC);

[0014] Where WA is the width of the image-guiding lens; DD is the set optimal viewing distance; and DC is the distance between the light-guiding lens and the real image plane.

[0015] According to one embodiment of the present disclosure, the image-capturing layer includes a plurality of lens groups arranged in sequence, each lens group including two adjacent image-capturing column lenses; wherein, the light guide column lenses are arranged in a one-to-one correspondence with the lens groups; the width of the light guide column lens is smaller than the width of the lens group and greater than 0.95 times the width of the lens group.

[0016] According to one embodiment of this disclosure, the width WB of the light guide lens is:

[0017] WB = 2 * WA * DD / (DD + DC);

[0018] Where WA is the width of the image-guiding lens; DD is the set optimal viewing distance; and DC is the distance between the light-guiding lens and the real image plane.

[0019] According to another aspect of this disclosure, a stereoscopic display device is provided, comprising a flat panel display panel and the aforementioned composite optical film; wherein the image-capturing layer is attached to the light-emitting surface of the flat panel display panel on the side away from the stereo grating layer.

[0020] According to one embodiment of this disclosure, the light-emitting surface of the pixel combination of the flat panel display is located at twice the focal plane of the image-capturing layer.

[0021] According to one embodiment of this disclosure, the width of the image-capturing cylindrical lens is not less than the width of the corresponding pixel combination.

[0022] According to one embodiment of this disclosure, the width of the image-capturing lens is the same as the width of the corresponding pixel combination.

[0023] According to one embodiment of the present disclosure, the stereo grating layer includes a plurality of light guide lenses arranged in sequence, wherein the focal plane of the light guide lenses coincides with the real image plane;

[0024] The focal length of the light guide lens is less than the distance between the light-emitting surface of the pixel assembly and the light-emitting surface of the flat panel display panel.

[0025] According to the stereoscopic display device and composite optical film provided in this disclosure, the image-capturing layer is used to image the image displayed by each pixel combination onto a real image plane to form a real image on the real image plane. The pattern projected by the stereo grating layer is a real image located on the real image plane, which is located outside the flat panel display panel; therefore, the distance between the stereo grating layer and the real image plane can be set as needed, without being affected by the thickness of the medium covering the pixels of the flat panel display panel. Compared to the method where the stereo grating layer directly projects the pixel image displayed by the pixel combination into external space, this can further reduce the distance between the stereo grating layer and the projected pattern, thereby increasing the field of view at the viewing distance.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0028] Figure 1 This is a schematic diagram illustrating the relationship between the distance between the 3D grating and the pixel array, and the field of view width at the viewing distance.

[0029] Figure 2 This is a schematic diagram of the structure of a stereoscopic display device in one embodiment of the present disclosure.

[0030] Figure 3 This is a schematic diagram of the structure of a stereoscopic display device in one embodiment of the present disclosure.

[0031] Figure 4 This is a schematic diagram illustrating the principle of projecting a real image into external space through a stereo grating layer in one embodiment of the present disclosure.

[0032] Figure 5 This is a schematic diagram illustrating the principle of forming a real image by superimposing real images of different pixel combinations in one embodiment of the present disclosure.

[0033] Figure 6 This is a schematic diagram illustrating the principle of a stereoscopic display device forming multiple viewpoints in one embodiment of the present disclosure.

[0034] Figure 7 This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure.

[0035] Figure 8 This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure.

[0036] Figure 9 This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure.

[0037] Figure 10 This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure.

[0038] Figure 11 This is a schematic diagram of the structure of a stereoscopic display device in one embodiment of the present disclosure.

[0039] Figure 12 This is a schematic diagram of the structure of a stereoscopic display device in one embodiment of the present disclosure.

[0040] Figure 13 This is a schematic diagram illustrating the principle of projecting a real image into external space through a stereo grating layer in one embodiment of the present disclosure.

[0041] Figure 14 This is a schematic diagram illustrating the principle of forming a real image by superimposing real images of different pixel combinations in one embodiment of the present disclosure.

[0042] Figure 15 This is a schematic diagram illustrating the principle of a stereoscopic display device forming multiple viewpoints in one embodiment of the present disclosure.

[0043] Figure 16 This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure.

[0044] Figure 17This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure.

[0045] Figure 18 This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure.

[0046] Figure 19 This is a schematic diagram of the structure of a composite optical film material in one embodiment of the present disclosure. Detailed Implementation

[0047] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0048] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0049] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0050] The inventors discovered in their research that, without increasing the number of viewpoint images, it's possible to bring the stereo grating closer to the pixel plane; this also increases the field of view at the viewing distance. Figure 1 In this paper, using a stereo grating with a convex lens (LEN) as an example, the principle of increasing the field of view at the observation distance is explained in principle. (See also...) Figure 1The stereoscopic display device has pixel groups (Pixes) corresponding to the convex lens (LEN), and each pixel group (Pixes) includes multiple adjacent pixels. At a viewing distance, the width of the viewing area is WV, the width of the pixel group (Pixes) is WP, the distance between the stereoscopic grating and the corresponding pixel group (Pixes) is d, and the distance between the stereoscopic grating and the optimal viewing position is D (i.e., the optimal viewing height). This is only used for a principle-based example and simplification, and not a limitation or actual description of the refractive indices of the various media in the stereoscopic display device. It can be assumed that the refractive index of the medium between the stereoscopic grating and the pixel group (Pixes) is the same as the refractive index of external space. Under this assumption, the following formula is satisfied: WV = (D*WP) / d. From the above formula, it can be seen that, with D and WP fixed, the smaller d is, the larger WV will be. It is understood that the derivation of the above formula is based on simplification and assumptions about the refractive indices of some media; in practical applications, although changes in refractive indices will cause distortion and compensation in the above formula, they will not change the trend conclusions derived from it. Figure 1 The example provided is an exemplary illustration using a stereo grating with a convex lens (LEN); it is understood that in other examples of this disclosure, the unit in the stereo grating used to achieve stereoscopic display may also be a visual impairment unit.

[0051] As shown above, the field of view at the viewing distance can be increased by reducing the distance between the lenticular lens and the projected image. However, other transparent media are often placed between the light-emitting surface of the pixels and the light-exiting surface of the display panel, such as one or more of the following: a glass cover, thin-film encapsulation, optical adhesive, or polarizer. This results in a relatively large distance between the light-emitting surface of the pixels and the light-exiting surface of the display panel. Even if the lenticular lens is directly placed on the light-exiting surface of the display panel to project the pixel image displayed by the pixel combination directly into the external space, the distance between the light-emitting surface of the pixels and the lenticular lens is still relatively large. In other words, the structure of the display panel itself limits the further reduction of the distance between the projected image and the lenticular lens, preventing this distance from being arbitrarily reduced to increase the field of view.

[0052] This disclosure provides a stereoscopic display device and a composite optical film material used in the stereoscopic display device. See also Figure 2 , Figure 3 , Figure 11 and Figure 12The stereoscopic display device includes a flat panel display panel 200 and a composite optical film 100. The flat panel display panel 200 has pixels (Pixes) for displaying images, and these pixels can be combined into multiple pixel combinations (GAs). During display, the flat panel display panel 200 can display multiple different viewpoint images, with each pixel in the pixel combination (GA) used to display these different viewpoint images. Thus, different viewpoint images can be viewed from different viewpoints; when both eyes are positioned at different viewpoints, they can view different viewpoint images, thereby experiencing a stereoscopic effect. Therefore, the stereoscopic display device of this embodiment is a multi-viewpoint stereoscopic display device.

[0053] See Figure 2 , Figure 3 , Figure 11 and Figure 12 The composite optical film 100 includes an image-capturing layer 110, a light-transmitting medium layer 120, and a stereo grating layer 130 stacked sequentially. The image-capturing layer 110 includes image-capturing lens LENAs arranged sequentially, each corresponding to a pixel combination GA of the flat panel display panel 200, for imaging the image (pixel image) displayed by each pixel combination GA onto a real image plane 101 to form a real image on the real image plane 101. The real image plane 101 is located within the light-transmitting medium layer 120. The stereo grating layer 130 projects the real image (real image GB) of the real image plane 101 into external space to achieve stereoscopic display.

[0054] Thus, the composite optical film 100 is attached to the light-emitting surface of the flat panel display panel 200; the stereoscopic grating layer 130 is disposed on the side of the light-transmitting medium layer 120 away from the image-capturing layer 110. When the stereoscopic display device is working, the pixel image displayed by each pixel combination GA of the flat panel display panel 200 can be imaged onto the real image plane 101 through the image-capturing layer 110. The real image on the real image plane 101 can be projected into the external space through the stereoscopic grating layer 130, that is, onto the side of the stereoscopic grating layer 130 away from the flat panel display panel 200. When a person is in a suitable viewing area, both eyes can see different images, thus seeing a stereoscopic effect. In the embodiments of this disclosure, the real image (real image GB) on the real image plane 101 is projected as the pattern and projected into the external space by the stereoscopic grating layer 130 to achieve multi-viewpoint stereoscopic display. This can be achieved by adjusting the distance between the stereo grating layer 130 and the real image plane 101, thereby adjusting the field of view at the viewing distance. In particular, the field of view at the viewing distance can be increased by reducing the distance between the stereo grating layer 130 and the real image plane 101.

[0055] In summary, in this embodiment, the pattern projected by the lenticular layer 130 is a real image GB located on a real image plane 101, which is located outside the flat panel display panel 200. Therefore, the distance between the lenticular layer 130 and the real image plane 101 can be set as needed, without being affected by the thickness of the medium covering the pixels of the flat panel display panel 200. Compared to the method where the lenticular layer 130 directly projects the pixel image displayed by the pixel combination GA into external space, this can improve the field of view at the viewing distance by further reducing the distance between the lenticular layer 130 and the projected pattern.

[0056] The structure, principle, and effects of the stereoscopic display device according to the present disclosure will be further explained and described below with reference to the accompanying drawings.

[0057] In this embodiment of the disclosure, the flat panel display panel 200 can be a liquid crystal display panel, a plasma display panel, an OLED (organic light-emitting diode) display panel, a Micro LED (micro light-emitting diode) display panel, a QD-OLED (quantum dot organic light-emitting diode) display panel, a QLED (quantum dot light-emitting diode) display panel, or other types of flat panel display panels.

[0058] In this embodiment of the disclosure, the flat panel display panel 200 is provided with an array of pixels, each pixel may include one sub-pixel or multiple sub-pixels. For example, each pixel includes one red sub-pixel, one green sub-pixel, and one blue sub-pixel. The flat panel display panel 200 is also provided with a pixel driving circuit to drive each sub-pixel, so that each sub-pixel emits light independently under the control of the pixel driving circuit.

[0059] These pixels (Pixes) can be divided into multiple pixel groups (GAs), each GA comprising multiple adjacent pixels. For example, multiple pixel columns can be combined into one pixel group (GA), such as 3 to 8 pixel columns. Of course, in other embodiments of this disclosure, the pixel groups (GAs) can be configured in other ways, such as combining multiple adjacent pixel rows into one pixel group (GA), or making the extension direction of the space occupied by the pixel group (GA) form an acute angle with the column direction, i.e., the pixel group (GA) is tilted.

[0060] In one embodiment of this disclosure, the space occupied by each pixel in the pixel combination GA is generally in the shape of a strip, and the width of this strip can be used as the width of the pixel combination GA. These pixel combinations GA are arranged sequentially. For example, when the pixel combination GA includes multiple pixel columns, these pixel combinations GA are arranged sequentially along the row direction.

[0061] See Figure 2 , Figure 3 , Figure 11 and Figure 12 The image-capturing layer 110 has image-capturing lens LENAs corresponding one-to-one with each pixel combination GA, for imaging the image displayed by each pixel combination GA outside the flat panel display panel 200, specifically, imaging it in the light-transmitting medium layer 120. The plane containing the real image (pixel image) of the image displayed by the pixel combination GA in the light-transmitting medium layer 120 is referred to in this disclosure as the real image plane 101. Thus, during stereoscopic display, the flat panel display panel 200 can control the display of the pixel combination GA, the image displayed by the pixel combination GA is imaged on the real image plane 101, and the real image (real image GB) of the real image plane 101 is projected into external space by the stereo grating layer 130.

[0062] In one embodiment of this disclosure, see Figure 2 , Figure 3 , Figure 11 and Figure 12 The width WA of the image-capturing lens LENA is not less than the width of the corresponding pixel combination GA, so that the pixel combination GA can be imaged through the corresponding image-capturing lens LENA or adjacent image-capturing lens LENAs. Furthermore, the width WA of the image-capturing lens LENA is equal to the width of the corresponding pixel combination GA. This allows the pixel image displayed by the pixel combination GA to be completely captured and imaged on the real image plane 101, reducing light loss during image capture by the image-capturing lens LENA. Furthermore, the widths of all image-capturing lens LENAs are the same.

[0063] In one embodiment of this disclosure, see Figure 2 , Figure 3 , Figure 11 and Figure 12 The light-emitting surface of the pixel group GA (i.e., the surface of the pixel Pix closest to the light-emitting surface of the flat panel display panel 200) is located at twice the focal plane of the image-taking cylindrical lens LENA. This makes the real image plane 101 located at twice the focal plane of the image-taking cylindrical lens LENA, and the image (pixel image) displayed by the pixel group GA is the same size as the real image presented. In this way, the real image images GB are sequentially adjacent, which can avoid the brightness loss caused by the real image being too small, and also avoid the increased crosstalk between images from different viewpoints caused by the real image being too large. Figure 2 , Figure 3 , Figure 11 and Figure 12In the example, DA represents the distance between the optical center of the image-taking cylindrical lens LENA and the light-emitting surface of the pixel, and f(A) represents the focal length of the image-taking cylindrical lens LENA; where DA = 2f(A), it is used to theoretically indicate that the light-emitting surface of the pixel combination GA is located at twice the focal plane of the image-taking cylindrical lens LENA. DB represents the distance between the optical center of the image-taking cylindrical lens LENA and the real image plane 101; where DB = 2f(A), it is used to theoretically indicate that the real image plane 101 is located at twice the focal plane of the image-taking cylindrical lens LENA. It is understood that when the medium between the image-taking cylindrical lens LENA and the pixel changes, especially when the refractive index and thickness of the medium change, DA is not necessarily equal to twice f(A) in value, and DA needs to be corrected according to the refractive index and thickness of the medium, etc. Similarly, when the thickness and material of the light-transmitting medium layer 120 change, DB is not necessarily equal to twice f(A) in value, and DB needs to be corrected according to the refractive index and thickness of the medium, etc. In summary, the fact that the emitting surface of the pixel combination GA is located at twice the focal plane of the image-taking lens LENA, and that the real image plane 101 is located at twice the focal plane of the image-taking lens LENA, is a limitation imposed on the final optical effect; specifically, the real image produced by the image displayed by the pixel combination GA through the image-taking lens LENA has the same size.

[0064] It is understood that in other embodiments of this disclosure, the light-emitting surface of the pixel combination GA may not be located at twice the focal plane of the image column lens LENA, for example, it may be located outside twice the focal plane of the image column lens LENA (on the side of the image column lens LENA away from the image column lens LENA), for example, at three or four times the focal plane.

[0065] In one embodiment of this disclosure, see Figure 3 and Figure 12 The image-capturing layer 110 can be bonded to the light-emitting surface of the flat panel display panel 200 via the optical adhesive layer 140. Of course, the image-capturing layer 110 can also be attached to the light-emitting surface of the flat panel display panel 200 in other ways, such as being formed directly on the light-emitting surface of the flat panel display panel 200.

[0066] In one embodiment of this disclosure, the focal length of the image-capturing lens LENA can be designed and determined based on the distance between the light-emitting surface of the pixel and the light-exiting surface of the flat panel display panel 200, so that the light-exiting surface of the pixel is located on twice the focal plane of the image-capturing lens LENA. Alternatively, the thickness of the optical adhesive layer 140 between the image-capturing lens LENA and the flat panel display panel 200 can be adjusted, or other light-transmitting height-adjusting layers can be attached between the image-capturing lens LENA and the flat panel display panel 200, thereby enabling the composite optical film 100 to be applied to different flat panel display panels 200 and ensuring that the light-emitting surface of the pixel of the flat panel display panel 200 is located on twice the focal plane of the image-capturing lens LENA.

[0067] In one embodiment of this disclosure, see Figure 8 and Figure 17 The composite optical film 100 may have an optical adhesive layer 140 bonded to the side of the image-taking lens LENA away from the light-guiding lens LENB; when manufacturing the stereoscopic display device, the optical adhesive layer 140 may be attached to the light-emitting surface of the flat panel display panel 200, thereby allowing the composite optical film 100 to be attached to the light-emitting surface of the flat panel display panel 200.

[0068] Optionally, the composite optical film 100 not attached to the flat panel display panel 200, see [reference needed]. Figure 8 and Figure 17 A protective film 300 can be pre-attached to the LENA side of the image-taking lens. When manufacturing the stereoscopic display device, the protective film 300 can be removed first, and then the composite optical film 100 can be attached to the flat panel display panel 200. For example, a release layer can be pre-attached to the side of the optical adhesive layer 140 away from the image-taking lens LENA as a protective film 300.

[0069] In this disclosure, see Figure 6 and Figure 15 The stereo grating layer 130 is used to project the real image GB of the real image plane 101 into external space for stereoscopic display. The stereo grating layer 130 can be a lens layer, a visual barrier layer, or other grating structures capable of achieving stereoscopic display.

[0070] In one embodiment of this disclosure, the stereoscopic grating layer 130 is a lens layer, which can improve the brightness of the stereoscopic display device. Specifically, the stereoscopic grating layer 130 includes a plurality of light guide lenses (LENBs) arranged sequentially, the focal plane of which coincides with the real image plane 101. In this way, the real image GB can be projected into external space by the light guide lenses (LENBs), thereby achieving stereoscopic display. Figure 2 , Figure 3 , Figure 11 and Figure 12 In this context, DC represents the distance between the optical center of the light guide lens LENB and the real image plane 101, and f(B) represents the focal length of the light guide lens LENB. In this embodiment, DC = f(B) is used to schematically illustrate that the focal plane of the light guide lens LENB coincides with the real image plane 101.

[0071] Furthermore, the focal length of the light guide lens LENB is less than the distance between the light-emitting surface of the pixel assembly GA and the light-emitting surface of the flat panel display panel 200. Thus, compared to a solution where the light guide lens LENB is positioned on the light-emitting surface of the flat panel display panel 200, the stereoscopic display device of this embodiment has a wider field of view at the viewing distance.

[0072] In one embodiment of this disclosure, see Figures 2 to 10 The light guide lens LENB and the image capturing lens LENA are configured in a one-to-one correspondence. The width of the light guide lens LENB is smaller than the width of the image capturing lens LENA, but greater than 0.95 times the width of the image capturing lens LENA, and particularly, it can be greater than 0.99 times the width of the image capturing lens LENA. Thus, the light guide lens LENB and the image capturing lens LENA are configured in a one-to-one correspondence, and the width of the light guide lens LENB is slightly smaller than that of the image capturing lens LENA.

[0073] In one example, the width WB of the light guide lens LENB is:

[0074] WB = WA * DD / (DC + DD);

[0075] Where WA is the width of the image-taking lens LENA; DD is the set optimal viewing distance; and DC is the distance between the light-guiding lens LENB and the real image plane 101, which is the focal length of the light-guiding lens LENB.

[0076] Optionally, the light guide lens LENB and the corresponding image-taking lens LENA are arranged in an overlapping manner. That is, the orthographic projection of the light guide lens LENB onto the light-emitting surface of the flat panel display panel 200 overlaps with the orthographic projection of the image-taking lens LENA onto the light-emitting surface of the flat panel display panel 200. For example, the orthographic projection of the light guide lens LENB onto the light-emitting surface of the flat panel display panel 200 is completely within the orthographic projection of the image-taking lens LENA onto the light-emitting surface of the flat panel display panel 200.

[0077] In this embodiment, the center line along the length of the orthogonal projection of the image-collecting lens LENA onto the light-emitting surface of the flat panel display panel 200 is referred to as the first center line, and the center line along the length of the orthogonal projection of the corresponding light-guiding lens LENB onto the light-emitting surface of the flat panel display panel 200 is referred to as the second center line. In one example, the first center line and the second center line coincide. This improves the symmetry of the stereoscopic display device, thereby simplifying the driving algorithm and achieving better stereoscopic display effects and lower power consumption.

[0078] In another embodiment of this disclosure, see [link to relevant documentation]. Figures 11-19 The image-capturing layer 110 includes a plurality of lens groups arranged sequentially, each lens group including two adjacent image-capturing pillar lenses (LENA); wherein, a light-guide pillar lens (LENB) is arranged in a one-to-one correspondence with each lens group; the width of the light-guide pillar lens (LENB) is smaller than the width of the lens group, but greater than 0.95 times the width of the lens group, and particularly can be greater than 0.99 times the width of the lens group. In other words, each light-guide pillar lens (LENB) corresponds to two adjacent image-capturing pillar lenses (LENA); the width of the light-guide pillar lens (LENB) is slightly smaller than the total width of the corresponding two image-capturing pillar lenses (LENA).

[0079] In one example, the width WB of the light guide lens LENB is:

[0080] WB = 2 * WA * DD / (DD + DC);

[0081] Where WA is the width of the image-taking column lens LENA; DD is the set optimal viewing distance; and DC is the distance between the light guide column lens LENB and the real image plane 101.

[0082] Optionally, the light guide lens (LENB) is arranged to overlap with the corresponding lens group. That is, the orthographic projection of the light guide lens (LENB) onto the light-emitting surface of the flat panel display panel 200 overlaps with the orthographic projection of the corresponding lens group onto the light-emitting surface of the flat panel display panel 200. For example, the orthographic projection of the light guide lens (LENB) onto the light-emitting surface of the flat panel display panel 200 is completely within the orthographic projection of the lens group onto the light-emitting surface of the flat panel display panel 200.

[0083] In this embodiment, the center line along the length of the orthographic projection of the lens group onto the light-emitting surface of the flat panel display panel 200 is referred to as the third center line. In one example, the second center line coincides with the third center line. This improves the symmetry of the stereoscopic display device, thereby simplifying the driving algorithm and achieving better stereoscopic display effects and lower power consumption.

[0084] In this embodiment of the disclosure, the light-transmitting medium layer 120 may include a single medium layer or multiple layers of stacked medium layers. These medium layers include, but are not limited to, air gaps (e.g., cavities filled with air or inert gas), inorganic material layers (e.g., silicon oxide layers, silicon nitride layers, silicon oxynitride layers, soda-lime glass layers, quartz glass layers, sapphire glass layers, etc.), transparent organic layers (e.g., polymethyl methacrylate layers, polyvinylphenol layers, polyethersulfone layers, polyimide layers, polyamide layers, polyacetal layers, polycarbonate layers, polyethylene terephthalate layers, polyethylene naphthalate layers, etc.), adhesive layers, etc.

[0085] In some embodiments of this disclosure, see Figure 10 and Figure 19 A scattering layer 160 (e.g., a transparent organic layer with dispersed nano-inorganic particles) is provided in the light-transmitting medium layer 120, and the real image plane 101 is located in the scattering layer 160. In this way, the image displayed by the pixel combination GA can be imaged on the scattering layer 160 and scattered in the scattering layer 160 to expand the light emission angle range of the real image, so that the real image can also simulate the light emission angle of the pixel.

[0086] In another embodiment of this disclosure, the light-transmitting medium layer 120 may not have a scattering layer 160. This reduces the decrease in display brightness caused by light scattering and reduces crosstalk between images from different viewpoints, thus improving the stereoscopic display effect. It is understood that even without a scattering layer 160, the light from the pixel combination GA will still be scattered to a certain extent during transmission to the real image plane 101 due to manufacturing variations in the stereoscopic display device and the characteristics of the materials themselves. This scattering ensures that the light from the pixel combination GA can be effectively projected into the external space and also allows for some light mixing between patterns at the same viewpoint of some pixel combinations GA, thereby achieving intra-frame spatial filtering, reducing the sharpness of the image at the same viewpoint, and improving the smoothness of the stereoscopic pattern.

[0087] Correspondingly, it can be understood that the pattern displayed by the pixel combination GA is not only imaged onto the real image plane 101 by the corresponding image-taking lenticular lens, but can also be imaged at other positions on the real image plane 101 by other adjacent image-taking lenticular lenses. Thus, the real image GB at any position is a mixture of multiple different real images, which is composed of a high-weight primary real image and multiple low-weight secondary real images superimposed. Specifically, the real image presented by the pixel combination GA overlapping with the real image GB is the primary real image, and the real images presented by other pixel combinations GA are secondary real images. In this way, intra-frame spatial filtering can be achieved between some pixel images of the same viewpoint image through the image-taking layer 110, reducing the image sharpness. In particular, in one embodiment of this disclosure, by limiting the size and position of the image-capturing lens LENA, the size of the pixel image displayed by the pixel combination GA is the same as the size of the real image GB; this ensures that only the content of the same viewpoint image will have the superposition of the primary real image and the secondary real image, and the content of different viewpoint images will not superimpose with each other; therefore, this can realize intra-frame spatial filtering of the same viewpoint image, and there will be no crosstalk between different viewpoint images.

[0088] In one embodiment of this disclosure, the composite optical film 100 may further include a protective layer 150, which may be disposed on the side of the imaging lens layer away from the image column lens LENA.

[0089] The following provides further exemplary descriptions of the stereoscopic display device of this disclosure using two different exemplary embodiments.

[0090] Example 1

[0091] Figure 2 and Figure 3 An example of a stereoscopic display device is given. This stereoscopic display device includes a flat panel display 200 and a composite optical film 100 attached to the light-emitting surface of the flat panel display 200. See also... Figure 2 and Figure 3 The flat panel display panel 200 has pixels (Pix) for displaying images, which are grouped into multiple pixel combinations (GA), each pixel combination (GA) including multiple adjacent pixels.

[0092] exist Figure 2In the example, the composite optical film 100 includes an image-capturing layer 110, a light-transmitting medium layer 120, and a stereo grating layer 130 stacked on the light-emitting side of the flat panel display panel 200, wherein the image-capturing layer 110 is attached to the light-emitting surface of the flat panel display panel 200. The image-capturing layer 110 includes an image-capturing lens LENA corresponding to each pixel combination GA; the width of the image-capturing lens LENA is equal to the width of its corresponding pixel combination GA. The center line (along the length direction) of the orthographic projection of the image-capturing lens LENA on the flat panel display panel 200 coincides with the center line (along the length direction) of the orthographic projection of the corresponding pixel combination GA on the light-emitting surface of the flat panel display panel 200. In this way, the image-capturing lens LENA substantially covers the corresponding pixel combination GA. The light-emitting surface of the pixel combination GA is located on twice the focal plane of the corresponding image-capturing lens LENA.

[0093] The light-transmitting medium layer 120 includes one or more layers of lens medium material. For example, the light-transmitting medium layer 120 includes a transparent substrate (e.g., a glass substrate or a resin substrate) and an adhesive layer that is connected to the image-capturing layer 110 and the stereo grating layer 130, respectively. Of course, in some other embodiments, the material of the light-transmitting medium layer 120 may be the same as one or two of the image-capturing layer 110 and the stereo grating layer 130. For example, the image-capturing layer 110, the light-transmitting medium layer 120, and the stereo grating layer 130 may be integrally formed by a mold.

[0094] The image displayed by the pixel combination GA can be projected as a real image in the light-transmitting medium layer 120 through the image-taking lens LENA. The plane containing these real images is referred to as the real image plane 101 in this disclosure. In this example, the real image plane 101 is located at twice the focal plane of the image-taking lens LENA. The image displayed by the pixel combination GA (referred to as the pixel image in this embodiment) is a real image projected through the image-taking lens LENA, and the pixel image and the projected real image are mirror images. Thus, in this embodiment, the stereoscopic display device can image the pixel image displayed by the pixel combination GA onto the real image plane 101 by providing the image-taking lens LENA. The real images projected by the pixel images displayed by each pixel combination GA ultimately form a real image GB on the real image plane.

[0095] In this example, the stereo grating layer 130 is disposed on the side of the light-transmitting medium layer 120 away from the image-capturing layer 110. Therefore, the image-capturing layer 110 and the stereo grating layer 130 are located on opposite sides of the real image plane 101. The stereo grating layer 130 includes light guide lenses (LENBs) that correspond one-to-one with each image-capturing lens (LENA), and the real image plane 101 is located on the focal plane of the light guide lens (LENB). The width WB of the light guide lens (LENB) satisfies: WB = WA * DD / (DC + DD); where WA is the width of the image-capturing lens (LENA); DD is the set optimal viewing distance; and DC is the distance between the optical center of the light guide lens (LENB) and the real image plane 101, thus DC is approximately equal to the focal length of the light guide lens (LENB). In this way, the width of the light guide lens (LENB) is slightly smaller than the width of the image-capturing lens (LENA) to achieve stereoscopic display. The orthographic projection of the light guide lens LENB onto the light-emitting surface of the flat panel display panel 200 is located within the orthographic projection of the corresponding image-taking lens LENA onto the light-emitting surface of the flat panel display panel 200; and the center line (along the length direction) of the orthographic projection of the image-taking lens LENA onto the light-emitting surface of the flat panel display panel 200 is the first center line, and the center line (along the length direction) of the orthographic projection of the corresponding light guide lens LENB onto the light-emitting surface of the flat panel display panel 200 is the second center line, and the first center line and the second center line coincide.

[0096] Figure 4 and Figure 5 This diagram illustrates the optical path of pixel combination GA being imaged on real image plane 101 by the corresponding image-taking cylindrical lens LENA, and the optical path of the real image GB on real image plane 101 being transmitted to external space by light-guiding cylindrical lens LENB. Figure 4 and Figure 5 In this context, pixel combination GA(n) represents the nth pixel combination GA on the flat panel display panel 200, image-taking lens LENA(n) represents the image-taking lens LENA corresponding to pixel combination GA(n), and light-guide lens LENB(n) represents the light-guide lens LENB corresponding to image-taking lens LENA(n). Real image GB(n) represents the real image GB corresponding to light-guide lens LENB(n). See also... Figure 4 and Figure 5 The pixel image displayed by the pixel combination GA(n) can be imaged on the real image plane 101 through the image-taking cylindrical lens LENA(n). The real image formed by the pixel image of the pixel combination GA(n) after being imaged by the image-taking cylindrical lens LENA is a mirror image of the pixel image and has the same size. See also Figure 5The image displayed by each pixel combination GA is imaged not only by its corresponding image-capturing lens LENA, but also by adjacent image-capturing lenses LENA; thus, the image displayed by each pixel combination GA can be imaged by different image-capturing lenses LENA. The real image formed by the pixel combination GA through its corresponding image-capturing lens LENA is the primary real image, and the real image formed by the pixel combination GA through adjacent image-capturing lenses LENA is the secondary real image; considering the angle of light, the secondary real image has a significantly lower weight in the real image than the primary real image. The real image GB on the real image plane 101 is a superposition of the primary and secondary real images; therefore, each pixel combination GA is imaged on the real image plane 101 through the image-capturing layer 110, which is equivalent to achieving intra-frame spatial filtering through physical means.

[0097] by Figure 4 and Figure 5 Taking the selected pixel combination GA as an example, the imaging process of the above pixel combination GA and the superposition process of the main real image and the subreal image are illustrated by way of example. Figure 4 Taking the image formation of a pixel combination GA(n) through an image-taking cylindrical lens LENA(n) as an example, this illustrates the process by which the pixel combination GA forms a principal real image through the corresponding image-taking cylindrical lens LENA. See also... Figure 4 and Figure 5 The pixel combination GA(n) is superimposed on the real image GB'(n) formed by the image-capturing cylindrical lens LENA(n) at the location of the real image GB(n), becoming part of the real image GB(n) and serving as the principal part with the highest weight. See also Figure 5 The real image GB(n) is a superposition of the primary real image GB`(n), the secondary real image GB``(n-2), and the secondary real image GB``(n+2). Among them, the secondary real image GB``(n-2) is the real image formed by the pixel combination GA(n-2) through the adjacent image-taking lens LENA(n-1), and the secondary real image GB``(n+2) is the real image formed by the pixel combination GA(n+2) through the adjacent image-taking lens LENA(n+1). The weights of the secondary real images GB``(n-2) and GB``(n+2) in the real image GB(n) are significantly lower than the weight of the primary real image GB`(n) in the real image GB(n). It is understandable that the real image GB(n) may also contain subreal images formed by the image-capturing cylindrical lens LENA of the pixel combination GA that is further away. However, the subreal images formed by the image-capturing cylindrical lens LENA of the pixel combination GA that are further away have a lower weight in the real image GB(n) and have a smaller impact on the real image GB(n).

[0098] See Figure 4 and Figure 6The real image GB on the real image plane 101 can be projected into external space as a transmitted pattern by the corresponding light guide lens LENB, achieving stereoscopic display. See also Figure 6 Multiple viewpoints can be formed in external space, for example, forming Figure 6 The display includes viewpoints PA and PB. It is understood that the stereoscopic display device of this disclosure can also form more viewpoints, such as 3 to 8 viewpoints, to achieve multi-viewpoint stereoscopic display. On the one hand, the same user can see different viewpoints when changing their viewing position, thus providing spatial mobility redundancy, making viewing more comfortable, and significantly improving the user experience. On the other hand, this can also meet the viewing needs of multiple people simultaneously.

[0099] exist Figures 2-6 In the example shown, a pixel combination GA can fill the content required for four viewpoint images, for example, sequentially filling the content required for the first viewpoint image, the second viewpoint image, the third viewpoint image, and the fourth viewpoint image from left to right. Thus, in the real image GB, each real image GB sequentially includes the content required for the fourth viewpoint image, the third viewpoint image, the second viewpoint image, and the first viewpoint image from left to right. In this example, the real image GB is a superposition of a primary real image and a secondary real image. The content of the primary real image's first viewpoint image is superimposed with the content of the secondary real image's first viewpoint image, the content of the primary real image's second viewpoint image is superimposed with the content of the secondary real image's second viewpoint image, the content of the primary real image's third viewpoint image is superimposed with the content of the secondary real image's third viewpoint image, and the content of the primary real image's fourth viewpoint image is superimposed with the content of the secondary real image's fourth viewpoint image. Therefore, by superimposing the primary real image and the secondary real image, intra-frame spatial filtering is achieved for each viewpoint image, improving the smoothness of the viewed viewpoint image. At the same time, the content of different viewpoint images will not overlap with each other, which avoids crosstalk between different viewpoint images, thereby ensuring accurate stereoscopic effect and avoiding visually obvious ghosting.

[0100] Figures 7-10 A schematic diagram of the structure of the composite optical film 100 capable of forming the above-mentioned stereoscopic display device is provided as an example.

[0101] exist Figure 7 In the example of the composite optical film 100, the composite optical film 100 includes an image-capturing layer 110, a light-transmitting medium layer 120, and a stereoscopic grating layer 130 stacked together. When fabricating a stereoscopic display device, the image-capturing layer 110 can be attached to the light-emitting surface of the flat panel display panel 200, for example, by attaching it to the light-emitting surface of the flat panel display panel 200 with optical adhesive.

[0102] exist Figure 8In the example composite optical film 100, the composite optical film 100 further includes an optical adhesive layer 140 and a protective layer 150. The optical adhesive layer 140 may be located on the surface of the image-capturing layer 110, and the protective layer 150 may cover the stereolithography layer 130. When not in use, the composite optical film 100 may also have a protective film 300 attached to the surface of the optical adhesive layer 140. By removing the protective film 300, the optical adhesive layer 140 can be exposed, allowing the composite optical film 100 to be directly attached to the light-emitting surface of the flat panel display panel 200.

[0103] exist Figure 9 In the example composite optical film 100, the image-taking column lens LENA of the image-taking layer 110 is a convex lens that protrudes away from the stereo grating layer 130. This facilitates the fabrication of the image-taking layer 110. Furthermore, the image-taking column lens LENA protrudes away from the stereo grating layer, and the light guide column lens LENB also protrudes away from the image-taking layer 110.

[0104] exist Figure 10 In the example, the composite optical film 100 may have a scattering layer 160 disposed in the light-transmitting medium layer 120; the real image plane may be located in the scattering layer.

[0105] Example 2

[0106] Figure 11 and Figure 12 An example of a stereoscopic display device is given. This stereoscopic display device includes a flat panel display 200 and a composite optical film 100 attached to the light-emitting surface of the flat panel display 200. See also... Figure 11 and Figure 12 The flat panel display panel 200 has pixels for displaying images, and these pixels are divided into multiple pixel combinations GA, each pixel combination GA including multiple adjacent pixels.

[0107] in, Figure 11 Example stereoscopic display device and Figure 2 The example stereoscopic display devices are basically the same, differing only in that each light guide lens (LENB) is paired with two adjacent image-taking lenses (LENA). Figure 12 Example stereoscopic display device and Figure 3 The example stereoscopic display devices are basically the same, the only difference being that each light guide lens LENB is set to correspond with two adjacent image-taking lenses LENA.

[0108] exist Figure 11 and Figure 12In the example stereoscopic display device, the stereoscopic grating layer 130 includes a light guide lens LENB, which is arranged in a one-to-one correspondence with every two image-capturing lens LENAs, and the real image plane 101 is located on the focal plane of the light guide lens LENB. Specifically, the image-capturing lens LENAs of the image-capturing layer 110 are divided into multiple lens groups, each lens group including two adjacent image-capturing lens LENAs; each lens group is arranged in a one-to-one correspondence with each light guide lens LENB. The width WB of the light guide lens LENB satisfies: WB = 2*WA*DD / (DC+DD); where WA is the width of the image-capturing lens LENA; DD is the set optimal viewing distance; and DC is the distance between the optical center of the light guide lens LENB and the real image plane 101, so DC is approximately equal to the focal length of the light guide lens LENB. In this way, the width of the light guide lens LENB is slightly less than twice the width of the image-capturing lens LENA to achieve stereoscopic display. The orthographic projection of the light guide lens LENB onto the light-emitting surface of the flat panel display panel 200 lies within the orthographic projection of the corresponding image-taking lens LENA onto the light-emitting surface of the flat panel display panel 200. Furthermore, the center line (along the length direction) of the orthographic projection of the lens group onto the light-emitting surface of the flat panel display panel 200 is the third center line, and the center line (along the length direction) of the orthographic projection of the corresponding light guide lens LENB onto the light-emitting surface of the flat panel display panel 200 is the second center line; the third center line coincides with the second center line.

[0109] Thus, each light guide lens LENB corresponds to two image-taking lenses LENA, two pixel combinations GA, and two real images GB.

[0110] Figure 13 and Figure 14 This diagram illustrates the optical path of pixel combination GA being imaged on real image plane 101 by the corresponding image-taking cylindrical lens LENA, and the optical path of the real image GB on real image plane 101 being transmitted to external space by light-guiding cylindrical lens LENB. Figure 4 and Figure 5 The illustrated optical path principle is similar. The image-capturing layer 110 achieves intra-frame spatial filtering of the same viewpoint image by imaging the pixel combination GA, without causing crosstalk between images from different viewpoints. For example, in Figure 14In the example, the real image GB(n) is the superposition of the main real image GB`(n), the subreal image GB``(n-2), and the subreal image GB``(n+2); the real image GB(n+1) is the superposition of the main real image GB`(n+1), the subreal image GB``(n-1), and the subreal image GB``(n+3). Among them, the primary real image GB`(n) is the real image formed by the pixel combination GA(n) through the corresponding imaging cylindrical lens LENA(n); the secondary real image GB``(n-2) is the real image formed by the pixel combination GA(n-2) through the adjacent imaging cylindrical lens LENA(n-1), and the secondary real image GB``(n+2) is the real image formed by the pixel combination GA(n+2) through the adjacent imaging cylindrical lens LENA(n+1); the weights of the secondary real images GB``(n-2) and GB``(n+2) in the real image GB(n) are significantly lower than the weight of the primary real image GB`(n) in the real image GB(n). The primary real image GB`(n+1) is the real image formed by the pixel combination GA(n+1) through the corresponding imaging cylindrical lens LENA(n+1); the secondary real image GB``(n-1) is the real image formed by the pixel combination GA(n-1) through the adjacent imaging cylindrical lens LENA(n); the secondary real image GB``(n+3) is the real image formed by the pixel combination GA(n+3) through the adjacent imaging cylindrical lens LENA(n+2); the weights of the secondary real images GB``(n-1) and GB``(n+3) in the real image GB(n+1) are significantly lower than the weight of the primary real image GB`(n+1) in the real image GB(n+1).

[0111] See Figure 13 and Figure 15 The real image GB on the real image plane 101 can be projected into external space as a transmitted pattern by the corresponding light guide lens LENB, achieving stereoscopic display. See also Figure 15 Multiple viewpoints can be formed in external space, for example, forming Figure 15 The display includes viewpoints PA and PB. It is understood that the stereoscopic display device of this disclosure can also form more viewpoints, such as 3 to 8 viewpoints, to achieve multi-viewpoint stereoscopic display. On the one hand, the same user can see different viewpoints when changing their viewing position, thus providing spatial mobility redundancy, making viewing more comfortable, and significantly improving the user experience. On the other hand, this can also meet the viewing needs of multiple people simultaneously.

[0112] exist Figures 11-15In the example shown, the two pixel combinations GA (i.e., the two pixel combinations GA corresponding to the light guide lens LENB) located under the same light guide lens LENB fill different viewpoint image contents. This is because the pixels of the two real image GBs under the same light guide lens LENB are transmitted to different directions by the light guide lens LENB. Therefore, the two pixel combinations GA located under the same light guide lens LENB fill the contents required for different viewpoint images as a whole, and these two pixel combinations GA can be used as a filling unit. For example, if the image taking lens LENA(n) and image taking lens LENA(n+1) are set as a lens group corresponding to a light guide lens LENB, then the pixel combination GA(n) and pixel combination GA(n+1) are used as a filling unit. When the stereoscopic display device is working, the contents required for multiple viewpoint images can be sequentially filled into each filling unit.

[0113] For example, in a filling unit, along the left-to-right direction, the left pixel combination GA sequentially fills the content required for the fourth viewpoint image, the third viewpoint image, the second viewpoint image, and the first viewpoint image; the right pixel combination GA sequentially fills the content required for the eighth viewpoint image, the seventh viewpoint image, the sixth viewpoint image, and the fifth viewpoint image. Thus, in the two real image images GB corresponding to the light guide lens LENB, along the left-to-right direction, the left real image image GB sequentially includes the content required for the first viewpoint image, the second viewpoint image, the third viewpoint image, and the fourth viewpoint image; the right real image image GB sequentially includes the content required for the fifth viewpoint image, the sixth viewpoint image, the seventh viewpoint image, and the eighth viewpoint image. In this example, the real image GB is a superposition of a primary real image and a secondary real image. The content of the first viewpoint image of the primary real image is superimposed with the content of the first viewpoint image of the secondary real image; the content of the second viewpoint image of the primary real image is superimposed with the content of the second viewpoint image of the secondary real image; the content of the third viewpoint image of the primary real image is superimposed with the content of the third viewpoint image of the secondary real image; the content of the fourth viewpoint image of the primary real image is superimposed with the content of the fourth viewpoint image of the secondary real image; the content of the fifth viewpoint image of the primary real image is superimposed with the content of the fifth viewpoint image of the secondary real image; the content of the sixth viewpoint image of the primary real image is superimposed with the content of the sixth viewpoint image of the secondary real image; the content of the seventh viewpoint image of the primary real image is superimposed with the content of the seventh viewpoint image of the secondary real image; and the content of the eighth viewpoint image of the primary real image is superimposed with the content of the eighth viewpoint image of the secondary real image. Therefore, by superimposing the primary real image and the secondary real image, intra-frame spatial filtering is achieved between the images of different viewpoints, which improves the smoothness of the viewed images. At the same time, the content of different viewpoint images will not overlap with each other, which avoids crosstalk between different viewpoint images, thereby ensuring an accurate stereoscopic effect and avoiding visually obvious ghosting.

[0114] Figures 16-19 A schematic diagram of the structure of the composite optical film 100 capable of forming the above-mentioned stereoscopic display device is provided as an example.

[0115] exist Figure 16 In the example of the composite optical film 100, the composite optical film 100 includes an image-capturing layer 110, a light-transmitting medium layer 120, and a stereoscopic grating layer 130 stacked together. When fabricating a stereoscopic display device, the image-capturing layer 110 can be attached to the light-emitting surface of the flat panel display panel 200, for example, by attaching it to the light-emitting surface of the flat panel display panel 200 with optical adhesive.

[0116] exist Figure 17In the example composite optical film 100, the composite optical film 100 further includes an optical adhesive layer 140 and a protective layer 150. The optical adhesive layer 140 may be located on the surface of the image-capturing layer 110, and the protective layer 150 may cover the stereolithography layer 130. When not in use, the composite optical film 100 may also have a protective film 300 attached to the surface of the optical adhesive layer 140. By removing the protective film 300, the optical adhesive layer 140 can be exposed, allowing the composite optical film 100 to be directly attached to the light-emitting surface of the flat panel display panel 200.

[0117] exist Figure 18 In the example composite optical film 100, the image-taking column lens LENA of the image-taking layer 110 is a convex lens that protrudes away from the stereo grating layer 130. This facilitates the fabrication of the image-taking layer 110. Furthermore, the image-taking column lens LENA protrudes away from the stereo grating layer, and the light guide column lens LENB also protrudes away from the image-taking layer 110.

[0118] exist Figure 19 In the example, the composite optical film 100 may have a scattering layer 160 disposed in the light-transmitting medium layer 120.

[0119] Understandably, in Figures 2 to 19 In Embodiments 1 and 2, the examples provided illustrate that each pixel combination GA can fill the content required for four viewpoint images. In other embodiments of this disclosure, the number of pixels in each pixel combination GA and the number of viewpoint images that can be loaded can be other numbers, such as 2 to 8.

[0120] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A composite optical film material for attaching to a light exit surface of a flat panel display panel, characterized by, The composite optical film material comprises a taking image layer, a light transmission medium layer and a stereoscopic grating layer arranged in sequence; The taking image layer comprises taking image columnar lenses arranged in sequence and corresponding to each pixel combination of the flat panel display panel; the taking image layer is used for imaging the pixel image displayed by each pixel combination on a real image plane to form a real image on the real image plane; the real image plane is located in the light transmission medium layer, and the image displayed by the pixel combination is also imaged on other positions of the real image plane by other adjacent taking image columnar lenses, so that the real image is formed by superposition of a main real image and multiple secondary real images; the real image presented by the pixel combination overlapping with the real image is the main real image, and the real images presented by other pixel combinations are secondary real images; The stereoscopic grating layer is used for projecting the real image on the real image plane to an external space to realize stereoscopic display; The real image plane is located at a two-fold focal plane of the taking image layer, and a light emitting surface of the pixel combination is located at a two-fold focal plane of the taking image columnar lens; the light emitting surface of the pixel combination is a surface of the light emitting surface of the pixel combination close to the flat panel display panel; The stereoscopic grating layer comprises a plurality of light guide columnar lenses arranged in sequence; a focal plane of the light guide columnar lens coincides with the real image plane; a distance between the light guide columnar lens and the real image plane is equal to a focal length of the light guide columnar lens; The focal length of the light guide columnar lens is smaller than a distance between the light emitting surface of the pixel combination and a light emitting surface of the flat panel display panel; The composite optical film material further comprises an optical adhesive layer bonded to a side of the taking image columnar lens away from the light guide columnar lens; the optical adhesive layer is used for bonding to the light emitting surface of the flat panel display panel and adjusting a thickness of the optical adhesive layer to make the light emitting surface of the pixel combination located at the two-fold focal plane of the taking image columnar lens.

2. The composite optical film of claim 1, wherein The light guide columnar lens and the taking image columnar lens are arranged in one-to-one correspondence; a width of the light guide columnar lens is smaller than a width of the taking image columnar lens and greater than 0.95 times the width of the taking image columnar lens.

3. The composite optical film of claim 2, wherein, The width WB of the light guide columnar lens is: WB = WA DD / (DD+DC); wherein, WA is the width of the taking image columnar lens; DD is a set optimal viewing distance; and DC is a distance between the light guide columnar lens and the real image plane.

4. The composite optical film of claim 1, wherein The taking image layer comprises a plurality of lens groups arranged in sequence; each lens group comprises two adjacent taking image columnar lenses; the light guide columnar lens and the lens group are arranged in one-to-one correspondence; a width of the light guide columnar lens is smaller than a width of the lens group and greater than 0.95 times the width of the lens group.

5. The composite optical film of claim 4, wherein, The width WB of the light guide columnar lens is: WB=2 WA DD / (DD+DC); wherein, WA is the width of the taking image columnar lens; DD is a set optimal viewing distance; and DC is a distance between the light guide columnar lens and the real image plane.

6. A stereoscopic display device, characterized by comprising: The composite optical film material comprises a flat panel display panel and the composite optical film material according to any one of claims 1 to 5; a side of the taking image layer away from the stereoscopic grating layer is attached to a light emitting surface of the flat panel display panel. The real image plane is located at a two-fold focal plane of the image-taking layer, and a light-emitting surface of the pixel combination is located at a two-fold focal plane of the image-taking columnar lens, and the light-emitting surface of the pixel combination is a surface of the pixel combination close to the light-emitting surface of the flat panel display panel; The stereoscopic grating layer comprises a plurality of light-guiding columnar lenses arranged in sequence, and a focal plane of the light-guiding columnar lens coincides with the real image plane; The focal length of the light-guiding columnar lens is less than a distance between the light-emitting surface of the pixel combination and the light-emitting surface of the flat panel display panel. The composite optical film material further comprises an optical adhesive layer bonded to a side of the image-taking columnar lens away from the light-guiding columnar lens, the optical adhesive layer being used for bonding to the light-emitting surface of the flat panel display panel and for adjusting the thickness of the optical adhesive layer so that the light-emitting surface of the pixel combination is located at a two-fold focal plane of the image-taking columnar lens.

7. The autostereoscopic display apparatus of claim 6, wherein, The width of the image-taking columnar lens is not less than the width of the corresponding pixel combination.

8. The autostereoscopic display apparatus of claim 6, wherein, The width of the image-taking columnar lens is the same as the width of the corresponding pixel combination.

Images