Image depth enhancement method

Abstract

In order to solve the problem that when a traditional three-dimensional display device displays a three-dimensional image with a certain depth distance from a screen, the image is not clear, the invention provides an image depth enhancement method. According to the image depth enhancement method, a light source, a grid diaphragm, a transparent liquid crystal display panel and a lens array are arranged, the grid diaphragm and the transparent liquid crystal display panel are arranged in front of the light source, and the lens array is arranged in front of the grid diaphragm and the transparent liquid crystal display panel, so that the grid diaphragm forms a grid image through the lens array; and the grid image is superposed with the displayed three-dimensional image to assist human eyes in focusing, so that the depth sense of the image is enhanced at the position of the grid image.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and more specifically, the present invention relates to an image depth enhancement method. Background Art

[0002] Traditional grating or integrated imaging stereoscopic displays have a central depth plane, and the pixels near the central depth plane are displayed most clearly. Usually, the central depth plane of the grating stereoscopic display is located at the spectroscopic element, while the central depth plane position of the integrated imaging is in an object-image relationship with the 2D display screen relative to the imaging lens array. Taking focused integrated imaging as an example, the distance from the imaging lens array to the 2D display screen is equal to the focal length of the lens array, and its central depth plane is at infinity. Therefore, when the above-mentioned stereoscopic display device displays a stereoscopic image at a certain depth distance from the screen, the image will be unclear. To solve this problem, the present invention proposes an image depth enhancement method. Summary of the invention

[0003] In order to solve the problem that a conventional stereoscopic display device may produce unclear images when displaying a stereoscopic image at a certain depth distance from the screen, the present invention proposes an image depth enhancement method.

[0004] The image depth enhancement method performs image depth enhancement according to the following steps.

[0005] First, a light source, a grating aperture, a transparent liquid crystal display panel and a lens array are arranged; the grating aperture and the transparent liquid crystal display panel are arranged before the light source; the lens array is arranged before the grating aperture and the transparent liquid crystal display panel; the arranged light source provides light for the transparent liquid crystal display panel to display.

[0006] Secondly, a light-transmitting mesh array is arranged on the grid aperture, and the opening ratio of the mesh array is greater than or equal to 80%.

[0007] Secondly, the stereoscopic imaging system composed of the transparent liquid crystal display panel and the lens array is set to work in a virtual imaging mode; in the virtual imaging mode, the grid aperture is set behind the lens array.

[0008] Finally, let the focal length of the lens array be f , the distance from the grid aperture to the lens array is L1, the distance from the transparent liquid crystal display panel to the lens array is L2, and L1> f , set L2< f , so that the grid aperture forms a grid image through the lens array at a distance of L3 from the lens array, and 1 / L1+1 / L3=1 / f ; and the stereoscopic image displayed on the transparent liquid crystal display panel is superimposed on the grid image to form a stereoscopic image overlapping with the grid image.

[0009] Since the grid image has a specific depth of distance L3, it can assist the human eye in focusing, thereby facilitating enhancing the sense of image depth at the location of the grid image.

[0010] Second, the stereoscopic imaging system composed of the transparent liquid crystal display panel and the lens array is set to work in a focusing imaging mode; in the focusing imaging mode, the grid aperture is set behind the lens array; the focal length of the lens array is set to f , the distance from the grid aperture to the lens array is L1, the distance from the transparent liquid crystal display panel to the lens array is L2, and L1> f , set L2= f .

[0011] Optionally, the stereoscopic imaging system composed of the transparent liquid crystal display panel and the lens array is set to work in a real imaging mode; in the real imaging mode, the grid aperture is set behind the lens array; the focal length of the lens array is set to f , the distance from the grid aperture to the lens array is L1, the distance from the transparent liquid crystal display panel to the lens array is L2, and L1> f , set L2> f .

[0012] Optionally, the grid aperture and the lens array are replaced so that their front and rear positions are interchanged, and L1 is set to f .

[0013] According to the basic principle of integrated imaging, preferably, the stereoscopic imaging system composed of a transparent liquid crystal display panel and a lens array operates in a virtual imaging mode. At this time, the central depth plane of the stereoscopic image is behind the lens array, and its image viewing angle is the largest. Since the grid image is distributed in front of the lens array, its stereoscopic depth of field enhancement effect is the best.

[0014] Optionally, a cylindrical lens grating is provided to replace the lens array.

[0015] In summary, in addition to the central depth plane of the 3D display system itself, the present invention can form a grid image again through the grid aperture through the lens array. The grid image can play the role of the pixel grid of the traditional display, assisting the human eye to focus, thereby providing a visually clear imaging range for the 3D display system, thereby increasing the image depth of field and enhancing the image depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the structural parameters of the present invention.

[0018] Figure 3 It is a schematic diagram of the optical effect of the present invention.

[0019] Icons: 100 - light source; 200 - grid aperture; 300 - transparent liquid crystal display panel; 400 - lens array; 410 - grid image; 510 - stereoscopic image; 520 - stereoscopic image overlapping with the grid image.

[0020] It should be understood that the above drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION

[0021] Figure 1 This embodiment provides an image depth enhancement method.

[0022] The image depth enhancement method performs image depth enhancement according to the following steps.

[0023] First, a light source 100, a grating aperture 200, a transparent liquid crystal display panel 300 and a lens array 400 are set; the grating aperture 200 and the transparent liquid crystal display panel 300 are set before the light source 100, and the lens array 400 is set before the grating aperture 200 and the transparent liquid crystal display panel 300; the set light source 100 provides light for the transparent liquid crystal display panel 300 to display.

[0024] Secondly, a light-transmitting mesh array is arranged on the grid aperture 200, and its opening ratio is 95%.

[0025] Secondly, please refer to Figure 2 The stereoscopic imaging system composed of the transparent liquid crystal display panel 300 and the lens array 400 is configured to work in a virtual imaging mode.

[0026] Finally, in the virtual imaging mode, the grid aperture 200 is set behind the lens array 400, and the focal length of the lens array 400 is set. f =5 mm, the distance L1 from the grid aperture 200 to the lens array 400 is 6 mm, and the distance L2 from the transparent liquid crystal display panel 300 to the lens array 400 is 4 mm, so that L1> f , L2< f .

[0027] At this time, the grid aperture 200 forms a grid image 410 through the lens array 400 at a distance of L3=30 mm from the lens array 400, and 1 / L1+1 / L3=1 / f .

[0028] Please refer to Figure 3 The stereoscopic image 510 displayed on the stereoscopic imaging system will be superimposed on the grid image 410, and a stereoscopic image 520 overlapping with the grid image is formed at the position of the grid image 410. Since the grid image 410 has a specific depth of 30 mm, it can assist the human eye in focusing, thereby facilitating enhancing the sense of image depth at the position of the grid image 410.

[0029] According to the basic principle of integrated imaging, the stereoscopic imaging system composed of the transparent liquid crystal display panel 300 and the lens array 400 operates in a virtual imaging mode. At this time, the central depth plane of the stereoscopic image is behind the lens array 400, and its image viewing angle is the largest. Since the grid image 410 is distributed in front of the lens array 400, its stereoscopic depth of field enhancement effect is the best.

[0030] In summary, in addition to the central depth plane of the 3D display system itself, the present invention can form a grid image 410 again through the grid aperture 200 via the lens array 400. The grid image 410 can play the role of a traditional display pixel grid to assist the human eye in focusing, thereby providing a visually clear imaging range for the 3D display system, thereby increasing the image depth of field and enhancing the image depth.

Claims

1. A method for image depth enhancement, characterized in that: First, a light source, a grid aperture, a transparent liquid crystal display panel and a lens array are arranged; the grid aperture and the transparent liquid crystal display panel are arranged before the light source; the lens array is arranged before the grid aperture and the transparent liquid crystal display panel; the arranged light source provides light for the transparent liquid crystal display panel to display; Secondly, a light-transmitting mesh array is set on the grid aperture, and the mesh array opening ratio is greater than or equal to 80%; Secondly, the stereoscopic imaging system composed of the transparent liquid crystal display panel and the lens array is set to work in a virtual imaging mode; in the virtual imaging mode, the grid aperture is set behind the lens array; Finally, let the focal length of the lens array be f , the distance from the grid aperture to the lens array is L1, the distance from the transparent liquid crystal display panel to the lens array is L2, and L1> f , set L2< f , so that the grid aperture forms a grid image through the lens array at a distance of L3 from the lens array, and 1 / L1+1 / L3=1 / f ; and the stereoscopic image displayed on the transparent liquid crystal display panel is superimposed on the grid image to form a stereoscopic image overlapping with the grid image.

2. The image depth enhancement method according to claim 1, characterized in that: The stereoscopic imaging system composed of the transparent liquid crystal display panel and the lens array is set to work in a focusing imaging mode; in the focusing imaging mode, the grid aperture is set behind the lens array; Assume the focal length of the lens array is f , the distance from the grid aperture to the lens array is L1, the distance from the transparent liquid crystal display panel to the lens array is L2, and L1> f , set L2= f .

3. The image depth enhancement method according to claim 1, characterized in that: The stereoscopic imaging system composed of the transparent liquid crystal display panel and the lens array is set to work in a real imaging mode; in the real imaging mode, the grid aperture is set behind the lens array; Assume the focal length of the lens array is f , the distance from the grid aperture to the lens array is L1, the distance from the transparent liquid crystal display panel to the lens array is L2, and L1> f , set L2> f .

4. The image depth enhancement method according to claim 3, characterized in that: Replace the grid aperture and lens array positions so that their front and back positions are interchanged, and set L1 < f .

5. The image depth enhancement method according to claim 1, characterized in that: A cylindrical lens grating is provided to replace the lens array.

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