A large depth of field display device based on a composite integrated light source

Abstract

To solve the problem of limited depth of field of a stereoscopic display device based on viewpoint morphology recording, the present invention proposes a large-depth-of-field display device based on a composite integrated light source. The device includes a 2D display panel, a first lens array, a second lens array, and a transparent liquid crystal display panel. The 2D display panel and the first lens array form a first-stage integrated imaging display structure; the first-stage integrated imaging display structure is used to display a three-dimensional enhanced image element array. The three-dimensional enhanced image element array records the spatial position of the viewing area with light points distributed in three dimensions, and it forms a second-stage integrated imaging display structure with the second lens array and is used to form the viewing area. The transparent liquid crystal display panel is placed in front of the second-stage integrated imaging display structure to achieve full-resolution stereoscopic display in a time-division multiplexing manner. Since the distances from the light points used to record different viewpoints in the three-dimensional enhanced image element array to the second lens array can be different, different optimal viewing distances can be achieved, thereby increasing the depth of field of the viewpoints.

Description

Technical Field

[0001] The present invention belongs to the technical field of three-dimensional display, and more specifically, the present invention relates to a large-depth-of-field display device based on a composite integrated light source. Background Art

[0002] An integral imaging display device can record and reproduce viewpoints in a three-dimensional display device based on viewpoint morphology recording (Patent No.: ZL202311260217.1), and cooperate with a transparent liquid crystal display panel to achieve full-resolution three-dimensional display. However, a traditional integral imaging display device has a central depth plane, that is, a depth of field where a clear image is formed. Different from image display, when the integral imaging display device is used for viewpoint reproduction, the front and back position distribution of its viewpoints will be much larger than the pixel depth distribution of a traditional three-dimensional image. Therefore, it poses higher requirements for the depth of field of the optical system. To meet the large-depth-of-field requirements for viewpoint reproduction, the present invention proposes a large-depth-of-field display device based on a composite integrated light source. This device can form a three-dimensional enhanced image element array by using a composite optical structure, thereby increasing the depth of field for viewpoint reproduction. Summary of the Invention

[0003] To solve the problem of the limited depth of field of a three-dimensional display device based on viewpoint morphology recording, the present invention proposes a large-depth-of-field display device based on a composite integrated light source.

[0004] The large-depth-of-field display device based on a composite integrated light source includes a 2D display panel, a first lens array, a second lens array, and a transparent liquid crystal display panel.

[0005] The 2D display panel, the first lens array, the second lens array, and the transparent liquid crystal display panel are arranged in sequence from back to front. The lens pitch of the second lens array is greater than that of the first lens array.

[0006] The focal length of the first lens array is f 1; the distance from the 2D display panel to the first lens array is equal to the focal length of the first lens array f 1; the 2D display panel and the first lens array form a first-stage integral imaging display structure; the first-stage integral imaging display structure is used to display a three-dimensional enhanced image element array.

[0007] The three-dimensional enhanced image element array records the spatial position of the viewing area with light points distributed in three dimensions, and forms a second-stage integral imaging display structure with the second lens array; the second-stage integral imaging display structure is used to form the viewing area. Finally, the first-stage integral imaging display structure and the second-stage integral imaging display structure are combined to form a composite integrated light source, which is specifically used for viewing area construction.

[0008] The focal length of the second lens array is f 2; the distance from any light point in the three-dimensional enhanced image element array to the second lens array isl ; and there is l greater than f 2, such that any light point in the three-dimensional enhanced image element array can form a real image through the second lens array; the real image is used to form a viewing area; let the optimal viewing distance of the formed viewing area be d , then there is .

[0009] In a time-division multiplexed manner, within the first time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the first viewing point. At the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the first viewing point; similarly, within the second time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the second viewing point, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the second viewing point.

[0010] Optionally, additional time slots and additional viewing points are added. Within the additional time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the additional viewing point, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the additional viewing point.

[0011] Since the distances from the light points used to record different viewing points in the three-dimensional enhanced image element array to the second lens array l are different, different optimal viewing distances can be achieved d ; then the first viewing point and the second viewing point can have different optimal viewing distances.

[0012] Optionally, multiple viewing points form a first viewing point set, and multiple viewing points form a second viewing point set; in a time-division multiplexed manner, within the first time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the first viewing point set, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the first viewing point set; similarly, within the second time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the second viewing point set, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the second viewing point set.

[0013] Optionally, additional time slots and additional viewing point sets are added. Within the additional time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the additional viewing point set, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the additional viewing point set.

[0014] In the present invention, the first - level integral imaging display structure and the second - level integral imaging display structure form a composite optical structure; the first - level integral imaging display structure provides a three - dimensional enhanced image element array for the second - level integral imaging display structure. Further, both the two - level integral imaging display structures are used to form a viewing area rather than provide a parallax image, so the requirement for resolution is not high. Therefore, the resolution of the three - dimensional enhanced image element array provided by the first - level integral imaging display structure can meet the requirements of the optical system. Further, the three - dimensional enhanced image element array displayed by the first - level integral imaging display structure can record the spatial position of the viewing area with three - dimensionally distributed light points. Therefore, when it forms the second - level integral imaging display structure with the second lens array, different central depth planes can be formed, thereby obtaining different optimal viewing distances and ultimately increasing the depth of field of the imaging system's viewpoints. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present invention.

[0016] Reference numerals: 100 - 2D display panel; 200 - first lens array; 300 - second lens array; 400 - transparent liquid crystal display panel; 500 - three - dimensional enhanced image element array; 510 - first light point; 520 - second light point; 610 - first viewing point; 620 - second viewing point.

[0017] It should be understood that the above - mentioned drawings are only schematic and are not drawn to scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Figure 1 A large - depth - of - field display device based on a composite integrated light source provided by this embodiment.

[0019] The large - depth - of - field display device based on a composite integrated light source includes a 2D display panel 100, a first lens array 200, a second lens array 300, and a transparent liquid crystal display panel 400.

[0020] The 2D display panel 100, the first lens array 200, the second lens array 300, and the transparent liquid crystal display panel 400 are arranged in sequence from back to front. The lens pitch of the second lens array 300 is 10 mm, and the lens pitch of the first lens array 200 is 2 mm.

[0021] The focal length of the first lens array 200 f 1 is 2 mm; the distance from the 2D display panel 100 to the first lens array 200 is equal to the focal length of the first lens array 200 f 1; the 2D display panel 100 and the first lens array 200 form a first - level integral imaging display structure; the first - level integral imaging display structure is used to display a three - dimensional enhanced image element array 500.

[0022] The three-dimensional enhanced image element array 500 records the spatial positions of the viewing areas with light points distributed in three dimensions, and forms a second-level integrated imaging display structure together with the second lens array 300; the second-level integrated imaging display structure is used to form the viewing areas. Finally, the first-level integrated imaging display structure and the second-level integrated imaging display structure are combined to form a composite integrated light source, which is specifically used for viewing area construction.

[0023] The focal length of the second lens array 300 f is 10 mm; the distance from any light point in the three-dimensional enhanced image element array 500 to the second lens array 300 is l ; and there is l greater than f 2, so that any light point in the three-dimensional enhanced image element array 500 can form a real image through the second lens array 300; this real image is used to form the viewing area; let the optimal viewing distance of the formed viewing area be d , then there is .

[0024] Please refer to Figure 1 , in a time-division multiplexed manner, within the first time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array 500 corresponding to the first viewing point, which provides the first light point 510. At the same time, the transparent liquid crystal display panel 400 synchronously displays the parallax image corresponding to the first viewing point; similarly, within the second time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array 500 corresponding to the second viewing point, which provides the second light point 520. At the same time, the transparent liquid crystal display panel 400 synchronously displays the parallax image corresponding to the second viewing point.

[0025] Since the distances from the light points in the three-dimensional enhanced image element array 500 for recording different viewing points to the second lens array 300 l are different, it can achieve different optimal viewing distances d ; then the first viewing point and the second viewing point can have different optimal viewing distances.

[0026] The distance from the first light point 510 to the second lens array 300 l is 10.4 mm, and the distance from the second light point 520 to the second lens array 300 l is 10.3 mm; then, the optimal viewing distance d of the first viewing point 610 formed by the first light point 510 is d 260 mm, and the optimal viewing distance

[0027] In the present invention, the first-stage integral imaging display structure and the second-stage integral imaging display structure form a composite optical structure; the first-stage integral imaging display structure provides a three-dimensional enhanced image element array 500 for the second-stage integral imaging display structure. Further, both the two-stage integral imaging display structures are used to form a viewing area and not to provide a parallax image, so the requirement for resolution is not high. Therefore, the resolution of the three-dimensional enhanced image element array 500 provided by the first-stage integral imaging display structure can meet the requirements of the optical system. Specifically, in this embodiment, taking the first viewing point 610 as an example, the width of its viewing area is 65 mm (human eye pupil distance), then the corresponding light spot size is 2.5 mm, and the pitch of the first lens array is 2 mm. Therefore, the composite optical structure of the present invention fully meets the resolution requirements for constructing the viewing area. Further, the three-dimensional enhanced image element array 500 displayed by the first-stage integral imaging display structure can record the spatial position of the viewing area with light spots distributed three-dimensionally. Therefore, when it forms the second-stage integral imaging display structure with the second lens array 300, different central depth planes can be formed, thereby obtaining different optimal viewing distances and ultimately increasing the depth of field of the viewing point of the imaging system.

Claims

1. A large depth of field display device based on a composite integrated light source, characterized in that: The large depth of field display device based on a composite integrated light source includes a 2D display panel, a first lens array, a second lens array, and a transparent liquid crystal display panel; The 2D display panel, the first lens array, the second lens array, and the transparent liquid crystal display panel are arranged in sequence from back to front; the lens pitch of the second lens array is greater than that of the first lens array; The focal length of the first lens array is f 1; The distance from the 2D display panel to the first lens array is equal to the focal length of the first lens array f 1; The 2D display panel and the first lens array form a first-level integrated imaging display structure; The first-level integrated imaging display structure is used to display a three-dimensional enhanced image element array; The three-dimensional enhanced image element array records the spatial position of the viewing area with three-dimensionally distributed light points, and forms a second-level integrated imaging display structure with the second lens array; the second-level integrated imaging display structure is used to form the viewing area; the first-level integrated imaging display structure and the second-level integrated imaging display structure are combined to form a composite integrated light source, which is specifically used for viewing area construction; The focal length of the second lens array is f 2; the distance from any light point in the three-dimensional enhanced image element array to the second lens array is l ; and there is l greater than f 2, so that any light point in the three-dimensional enhanced image element array can form a real image through the second lens array; the real image is used to form a viewing area; let the optimal viewing distance of the formed viewing area be d , then there is ; In a time-division multiplexed manner, within the first time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the first viewing point, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the first viewing point; similarly, within the second time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the second viewing point, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the second viewing point; Distance from the light points at different viewpoints to the second lens array l If they are not simultaneous, the optimal viewing distances achieved are d different; the first viewpoint and the second viewpoint have different optimal viewing distances.

2. The large depth of field display device based on a composite integrated light source according to claim 1, characterized in that: An additional time slot and additional viewing points are added. Within the additional time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the additional viewing point, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the additional viewing point.

3. The large depth of field display device based on a composite integrated light source according to claim 1, characterized in that: Multiple viewing points form a first viewing point set, and multiple viewing points form a second viewing point set; in a time-division multiplexed manner, within the first time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the first viewing point set, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the first viewing point set; similarly, within the second time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the second viewing point set, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the second viewing point set.

4. The large depth of field display device based on a composite integrated light source according to claim 3, characterized in that: An additional time slot and an additional viewing point set are added. Within the additional time slot, the first-level integrated imaging display structure displays the three-dimensional enhanced image element array corresponding to the additional viewing point set, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the additional viewing point set.

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