Large-viewing-angle high-resolution naked eye light field 3D digital photo frame

Abstract

The invention provides a large-view-angle high-resolution naked eye light field 3D digital photo frame. The digital photo frame is composed of a 2D display screen, a cylindrical lens array, a touch screen and a photo frame body. And the 2D display screen is used for presenting the light field 3D film source and performing intelligent switching playing of the light field 3D film source. The touch screen is used for achieving touch operation and conducting anti-reflection and anti-reflection processing on the reconstructed light, glare is reduced, and a high-transmittance 3D image is obtained. The photo frame body is used for supporting and fixing the digital photo frame. The cylindrical lens array accurately reconstructs a space light field, voxels are formed through convergence at different positions in a large-angle space range, the size of the voxels on a convergence plane is controlled to be equal to the pitch of the cylindrical lens array, the interval of light beams emitted by the voxels in adjacent directions is smaller than the size of pupils of human eyes on a reference viewpoint plane, dense viewpoints are constructed, and the distance between the light beams is smaller than the distance of the pupils of the human eyes. It is guaranteed that reconstructed light rays are accurate and dense in a large-view-angle range, and the resolution of 3D images in a large-view-angle viewing area is improved.

Description

1. Technical Field

[0001] The present invention relates to the field of 3D display technology, and more specifically, to a large-viewing-angle, high-resolution, naked-eye light-field 3D digital photo frame. 2. Background Technology

[0002] As a carrier of information display, digital photo frame has become the choice of more and more families in the consumer market and has developed rapidly recently. With the continuous change of people's demand for display, naked-eye 3D digital photo frame can display image depth information and restore the real scene, which is increasingly favored by consumers.

[0003] Conventional multi-viewpoint naked-eye 3D digital photo frames have a small viewing angle, limited viewing distance, and cause visual fatigue when viewing in stereoscopic mode. However, naked-eye light field 3D display digital photo frames have advantages such as full-color display, no viewing distance limit, and no visual fatigue when viewing in stereoscopic mode. However, the resolution, viewing angle, and depth indicators are still limited, and there is a mutual restriction between the indicators, making it difficult to improve them at the same time, which greatly reduces the user experience. It is a challenge to achieve a naked-eye light field 3D digital photo frame with a large viewing angle and high resolution while ensuring a certain depth range. III. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention proposes a large viewing angle and high resolution naked eye light field 3D digital photo frame. The digital photo frame is composed of a 2D display screen, a cylindrical lens array, a touch screen, and a photo frame body.

[0005] The 2D display screen is used to present light field 3D film sources and perform intelligent switching and playback of the light field 3D film sources.

[0006] The cylindrical lens array is used to modulate the direction of the light emitted by the 2D display screen, reconstruct the light field in space, suppress aberration, and the reconstructed light is distributed with high density within a large angle, the voxel size constituting the 3D image is small, and the angle of the visible 3D image is large.

[0007] The touch screen is used to implement touch operation and perform anti-reflection and anti-transmission processing on the reconstructed light to reduce glare and obtain a 3D image with high transmittance.

[0008] The photo frame body is used to support and fix the digital photo frame.

[0009] Furthermore, the display mode of the 2D display screen can be any one of LCD, OLED, and MicroLED, and the pixel arrangement mode can be any one of RGB, BGR, RGBW, Pentile, Diamond, and Delta. The smallest light-emitting unit of the 2D display screen is a sub-pixel.

[0010] Furthermore, the light field 3D film source presented by the 2D display screen may be any one of an image and a video.

[0011] Furthermore, the image or video frame of the light field 3D film source presented on the 2D display screen is obtained from multiple parallax images according to a specific pixel mapping method, and the pixel mapping method is consistent with the viewpoint arrangement of the naked-eye light field 3D digital photo frame.

[0012] Furthermore, the cylindrical lens array is an array composed of a plurality of cylindrical lens units arranged at equal intervals in a one-dimensional direction, and the cylindrical lens array is closely attached to the surface of the 2D display screen, and has a fixed inclination angle with the vertical arrangement direction of the pixels of the 2D display screen. By accurately refracting the light emitted by sub-pixels at different distances from the cylindrical lens array to different directions in space, a high-resolution 3D image can be reconstructed in a space with a large angle range.

[0013] Furthermore, the surface of the cylindrical lens unit can be any one of an aspherical surface and a free-form surface. After the light emitted by the sub-pixel of the 2D display screen passes through the cylindrical lens array, a light beam having the same size as the pitch of the cylindrical lens array is generated.

[0014] Furthermore, the touch screen is closely attached to the surface of the cylindrical lens array, and the touch screen comprises a glass substrate, a touch layer and an anti-reflection film layer. The touch layer is used to realize touch operation. The anti-reflection film layer is used to reduce light reflection.

[0015] Furthermore, the photo frame body has reserved operation buttons and a power interface, and through a certain mechanical structure and electrical connection, touch-type control of the 2D display screen is achieved without changing the appearance of the photo frame body.

[0016] The working principle of the large viewing angle and high resolution naked eye light field 3D digital photo frame is as follows: the user touches and controls the large viewing angle and high resolution naked eye light field 3D digital photo frame, intelligently switches and plays the light field 3D film source, the sub-pixels of the 2D display screen emit light carrying the light field direction and position information, the cylindrical lens array modulates the light to the designated position in the space in a large range, converges at different positions within a large angle space range to form voxels, and multiple voxels form a 3D image, which is received by the human eye, ensuring a large viewing angle viewing area. The cylindrical lens array controls the interval of the adjacent direction light beams emitted by the voxels, which is smaller than the size of the human eye pupil at the reference viewpoint plane, ensuring the reproduction of high-resolution 3D images. IV. Description of the drawings

[0017] The above aspects and advantages of the present invention will be further clarified and easily understood from the following detailed description in conjunction with the accompanying drawings and embodiments, in which:

[0018] AttachedFigure 1 A schematic diagram of a structure of a wide viewing angle and high resolution naked eye light field 3D digital photo frame provided by an embodiment of the present invention;

[0019] Attached Figure 2 A schematic diagram of an aspherical cylindrical lens array provided by an embodiment of the present invention;

[0020] Attached Figure 3 A schematic diagram of aberration suppression for a large viewing angle provided by an embodiment of the present invention;

[0021] Attached Figure 4 A schematic diagram of a high-resolution 3D image reproduction optical path provided by an embodiment of the present invention;

[0022] Attached Figure 5 A schematic diagram of dense viewpoint construction provided by an embodiment of the present invention;

[0023] Attached Figure 6 A schematic diagram of the internal structure of a touch screen provided by an embodiment of the present invention;

[0024] Attached Figure 7 The present invention is a schematic structural diagram of a photo frame provided by an embodiment of the present invention.

[0025] The graphic symbols of the above-mentioned drawings are:

[0026] 101 2D display screen, 102 aspheric cylindrical lens array, 103 touch screen, 104 photo frame, 201 cylindrical lens unit, 301 voxel I, 302 voxel II, 303 reference viewpoint plane, 304 human eye, 305 voxel III, 401 light beam I emitted by voxel 301, 402 light beam II emitted by voxel 301, 501 parallax image, 502 light field 3D film source, 503 image unit of light field 3D film source 502, 601 glass substrate, 602 touch layer, 603 anti-reflection and anti-reflection film layer, 701 operation button, 702 power interface.

[0027] It should be understood that the above drawings are only schematic and are not drawn to scale. V. Specific implementation methods

[0028] The following is a detailed description of an embodiment of a large viewing angle and high resolution naked eye light field 3D digital photo frame provided by the present invention, and further describes the present invention. The following embodiments are only used to further illustrate the present invention and cannot be understood as limiting the protection scope of the present invention. Persons skilled in the art in this field may make some non-essential improvements and adjustments to the present invention based on the above invention content, which still fall within the protection scope of the present invention.

[0029] Attached Figure 1The schematic diagram of the structure of a wide viewing angle and high resolution naked eye light field 3D digital photo frame provided by an embodiment of the present invention is shown. In this embodiment, the wide viewing angle and high resolution naked eye light field 3D digital photo frame is composed of a 2D display screen 101, an aspherical cylindrical lens array 102, a touch screen 103, and a photo frame body 104.

[0030] The 2D display screen 101 is used to present light field 3D film sources and perform intelligent switching and playback of light field 3D film sources. The display mode of the 2D display screen 101 is LCD, the pixel arrangement mode is RGB vertical strip arrangement, the resolution is 1800×2880 pixels, and the minimum light-emitting unit is a sub-pixel. The light field 3D film source presented on the 2D display screen 101 has the same resolution as the 2D display screen 101, which is 1800×2880 pixels.

[0031] The aspherical cylindrical lens array 102 is used to modulate the direction of the light emitted by the 2D display screen 101, reconstruct the light field in space, and suppress aberration. After reconstruction, the light is distributed at a large angle and high density, the voxel size of the 3D image is small, and the viewing angle of the 3D image is large. The surface shape of the aspherical cylindrical lens array is expressed as:

[0032]

[0033] Among them, c represents the vertex curvature of the surface, k represents the cone coefficient, e represents the eccentricity, and α2, α4, and α6 are the high-order terms of the even-order rotation aspheric surface. Figure 2 The schematic diagram of the aspheric cylindrical lens array 102 provided by an embodiment of the present invention is shown. The aspheric cylindrical lens array 102 is formed by arranging a plurality of cylindrical lens units 201 at equal intervals in a one-dimensional direction, and the surface of each cylindrical lens unit 201 is an even-rotated aspheric surface. The aspheric cylindrical lens array 102 is closely attached to the surface of the 2D display screen 101, and is inclined at an angle to the vertical arrangement direction of the RGB pixels of the 2D display screen 101, so as to increase the number of viewing viewpoints.

[0034] The aspherical cylindrical lens unit 201 accurately modulates the light emitted by the covered left and right edge sub-pixels to the specified position, suppresses the aberration in each field of view caused by the increase in viewpoints, and increases the viewing angle. The direction of the light emitted by the 2D display screen is -89° to +89°. After the aspherical cylindrical lens array 102 modulates the direction of the light, the 3D viewing angle of the main viewing area of ​​the reconstructed light field is -20° to +20°. Within this viewing angle range, the reconstructed light is correct and densely distributed. Figure 3The schematic diagram of aberration suppression of a wide viewing angle provided by an embodiment of the present invention is shown. The left and right edge sub-pixels generate large deflection angle light beams through the cylindrical lens unit 201, and the left and right edge sub-pixel light beams with the same name converge at the corresponding voxel I 301 and voxel II 302 in space, and continue to propagate forward, and are received by the human eye 304 within a wide angle range at the reference viewpoint plane 303, providing a wide viewing angle viewing area.

[0035] The aspherical cylindrical lens unit 201 precisely modulates the light emitted by all the covered sub-pixels to the specified position, controls the voxel size of the light beams of the same sub-pixels to be small, and ensures high 3D image resolution. Figure 4 The schematic diagram of the optical path for reproducing a high-resolution 3D image provided by an embodiment of the present invention is shown. Light emitted by sub-pixels at different distances is refracted to different directions in space by the cylindrical lens unit 201, generating light beams of the same size as the pitch of the aspherical cylindrical lens array 102. Light beams emitted by sub-pixels of the same name converge at the corresponding voxel III 305 or voxel I 301 in space, and continue to propagate forward and are received by the human eye 304. The size of voxel I 301 and voxel III 305 on the convergence plane is equal to the pitch of the aspherical cylindrical lens array 102. The human eye 304 simultaneously receives two light beams emitted by the same voxel I 301: light beam I 401 and light beam II 402. The light beam I 401 and light beam II 402 are located at the reference viewpoint plane 303, and the interval is smaller than the pupil size of the human eye 304. At the same time, the interval between the sizes of adjacent voxels I 301 and voxel III 305 is small, and a high-resolution 3D image is reproduced.

[0036] The light field 3D film source is used to construct densely arranged viewpoints in space through the aspherical cylindrical lens array 102. Figure 5 FIG. 4 shows a schematic diagram of dense viewpoint construction provided by an embodiment of the present invention. view is the index of the parallax image 501, and the index increases from left to right. view =1,2,…,N, where N is the total number of parallax images 501. The light field 3D film source 502 is an image obtained by N parallax images 501 according to a specific pixel mapping method. The number of parallax images 501 is exactly the same as the number of viewpoints, both of which are N. The pixel mapping method of the N parallax images 501 is consistent with the arrangement of the N viewpoints. The image unit 503 of the light field 3D film source 502 is constructed into N densely arranged viewpoints in space through the aspherical cylindrical lens array 102, and the distance between adjacent viewpoints is less than the average pupil size of the human eye, which is 4mm.

[0037] The touch screen 103 is used to implement touch operation and perform anti-reflection and anti-transmission processing on the reconstructed light to reduce glare and obtain a high-transmittance 3D image. The touch screen 103 is closely attached to the surface of the aspherical cylindrical lens array 102. Figure 6 The schematic diagram of the internal structure of the touch screen 103 provided by an embodiment of the present invention is shown. The touch screen 103 includes a glass substrate 601, a touch layer 602 and an anti-reflection film layer 603. The touch layer 602 is used to implement touch operation. The anti-reflection film layer 603 is used to reduce light reflection and increase image contrast. The transmittance of the anti-reflection film layer 603 is 98%.

[0038] The photo frame 104 is used to support and fix the naked eye light field 3D digital photo frame. Figure 7 The schematic diagram of the structure of the photo frame 104 provided by an embodiment of the present invention is shown. The photo frame 104 has a reserved operation button 701 and a power interface 702, and through a certain mechanical structure and electrical connection, the touch control of the 2D display screen is realized without changing the appearance of the photo frame body.

[0039] The present invention proposes a large-viewing angle and high-resolution naked-eye light field 3D digital photo frame, which uses a cylindrical lens array to accurately reconstruct a spatial light field, has dense viewpoints, and the interval between light beams emitted by voxels in adjacent directions is smaller than the size of the human eye pupil at the reference viewpoint plane, thereby suppressing the aberration under each field of view, ensuring that the light is accurately and densely reconstructed within a larger viewing angle range, thereby improving the resolution of the 3D image.

[0040] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the protection scope of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the protection scope covered by the present invention.

Claims

1. A wide viewing angle and high resolution naked eye light field 3D digital photo frame, characterized in that: The device includes a 2D display screen, a cylindrical lens array, a touch screen, and a photo frame; The 2D screen is used to present light field 3D film sources and perform intelligent switching and playback of light field 3D film sources; The cylindrical lens array is used to modulate the direction of light emitted by the 2D display screen in the tablet computer, reconstruct the light field in space, and suppress aberration. After reconstruction, the light is distributed with high density in a large angle, the voxel size constituting the 3D image is small, and the angle of the visible 3D image is large; The touch screen is used to implement touch operation; The photo frame body is used to support and fix the digital photo frame, and through the reserved operation buttons and power interface, the touch control of the 2D display screen is realized without changing the appearance of the photo frame body.

2. A wide viewing angle, high resolution, naked eye light field 3D digital photo frame according to claim 1, characterized in that: The cylindrical lens array suppresses aberrations in each field of view. The left and right edge sub-pixels covered by the cylindrical lens array generate light beams with large deflection angles through the cylindrical lens array. The light beams emitted by the left and right edge sub-pixels with the same name converge into voxels in space, providing a large viewing angle viewing area at the reference viewpoint plane.

3. A wide viewing angle, high resolution, naked eye light field 3D digital photo frame according to claim 1, characterized in that: The cylindrical lens array precisely modulates light emitted from sub-pixels at different distances to specified positions in space over a large range, and converges at different positions in space to form voxels. The cylindrical lens array controls the size of the voxels on the convergence plane to be equal to the pitch of the cylindrical lens array. The voxels emit dense light beams, and the intervals between the light beams in adjacent directions are smaller than the size of the human eye pupil at the reference viewpoint plane, thereby providing high-resolution 3D display images.

4. A wide viewing angle, high resolution, naked eye light field 3D digital photo frame according to claim 1, characterized in that: The light field 3D film source is obtained by parallax image mapping, the number of the parallax images is consistent with the number of viewpoints, and the display unit of the light field 3D film source constructs densely arranged viewpoints in space through the cylindrical lens array, and the distance between adjacent viewpoints is less than the average human eye pupil size of 4mm.

5. A wide viewing angle, high resolution, naked eye light field 3D digital photo frame according to claim 1, characterized in that: The touch screen is closely attached to the surface of the cylindrical lens array, and performs anti-reflection and anti-transmission processing on the reconstructed light to reduce glare, increase image contrast, obtain a high-transmittance 3D image, and realize intelligent switching of the light field 3D film source by touch operation.

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