Large depth-of-field display device based on composite integrated light source

Abstract

In order to solve the problem that a stereoscopic display device based on viewpoint form recording is limited in depth of field, the invention provides a large-depth-of-field display device based on a composite integrated light source. The device comprises 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 for displaying the three-dimensional enhanced image element array. The three-dimensional enhanced image element array records the spatial position of a visual area through light spots distributed in a three-dimensional mode, and the three-dimensional enhanced image element array and the second lens array form a second-stage integrated imaging display structure and are used for forming the visual area. And the transparent liquid crystal display panel is placed in front of the second-stage integrated imaging display structure to realize full-resolution stereoscopic display in a time division multiplexing mode. The distances from the light spots for recording different viewpoints in the three-dimensional enhanced image element array to the second lens array can be different, so that different optimal viewing distances can be realized, and the depth of field of the viewpoints is increased.

Description

Technical Field

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

[0002] The integrated imaging display device can record and reproduce viewpoints in a stereoscopic display device based on viewpoint morphology recording (patent number: ZL202311260217.1), and cooperate with a transparent liquid crystal display panel to achieve full-resolution stereoscopic display. However, the traditional integrated imaging display device has a central depth plane, that is, the depth of field of a clear image. Different from image display, when the integrated imaging display device is used for viewpoint reproduction, the front and rear position distribution of its viewpoint will be much larger than the pixel depth distribution of the traditional three-dimensional image. Therefore, it puts higher requirements on the depth of field of the optical system. In order to adapt to the large depth of field requirements of viewpoint reproduction, the present invention proposes a large depth of field display device based on a composite integrated light source. The device can use a composite optical structure to form a three-dimensional enhanced image element array, thereby increasing the depth of field of viewpoint reproduction. Summary of the invention

[0003] In order 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.

[0004] The large depth of field display device based on a composite integrated light source comprises 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 placed in sequence from back to front. The lens pitch of the second lens array is greater than the lens pitch 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 constitute 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.

[0007] 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. 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 the construction of the viewing area.

[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 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 .

[0009] In a time-division multiplexing 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 viewpoint, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the first viewpoint; 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 viewpoint, and at the same time, the transparent liquid crystal display panel synchronously displays the parallax image corresponding to the second viewpoint.

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

[0011] The distance from the light point used to record different viewpoints in the three-dimensional enhanced image element array to the second lens array l Different, it can achieve different optimal viewing distances d ; then the first viewpoint and the second viewpoint may have different optimal viewing distances.

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

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

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

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

[0016] Icon: 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 spot; 520 - second light spot; 610 - first viewpoint; 620 - second viewpoint.

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

[0018] Figure 1 This embodiment provides a large depth of field display device based on a composite integrated light source.

[0019] The large depth of field display device based on a composite integrated light source comprises 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 placed 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 first lens array has a focal length of 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 constitute 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 500.

[0022] The three-dimensional enhanced image element array 500 records the spatial position of the visual zone with three-dimensionally distributed light points, and forms a second-level integrated imaging display structure with the second lens array 300; the second-level integrated imaging display structure is used to form the visual zone. 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 visual zone construction.

[0023] Second lens array 300 focal length f 2 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 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; the real image is used to form a viewing area; the optimal viewing distance of the formed viewing area is d , then .

[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 viewpoint, which provides the first light spot 510, and at the same time, the transparent liquid crystal display panel 400 synchronously displays the parallax image corresponding to the first viewpoint; 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 viewpoint, which provides the second light spot 520, and at the same time, the transparent liquid crystal display panel 400 synchronously displays the parallax image corresponding to the second viewpoint.

[0025] The distance from the light point used to record different viewpoints in the three-dimensional enhanced image element array 500 to the second lens array 300 is l Different, it can achieve different optimal viewing distances d ; then the first viewpoint and the second viewpoint may have different optimal viewing distances.

[0026] The distance from the first light spot 510 to the second lens array 300 l is 10.4 mm, and the distance from the second light spot 520 to the second lens array 300 is l is 10.3 mm; then, the best viewing distance of the first viewpoint 610 formed by the first light spot 510 is d The optimal viewing distance of the second viewpoint 620 formed by the second light spot 520 is 260 mm. d It is 343 mm.

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

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 comprises 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 placed in sequence from back to front; the lens pitch of the second lens array is greater than the lens pitch 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 constitute 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 constructing the viewing area; 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 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 ; In a time-division multiplexing manner, in a first time slot, the first-level integrated imaging display structure displays a three-dimensional enhanced image element array corresponding to a first viewpoint, and at the same time, the transparent liquid crystal display panel synchronously displays a parallax image corresponding to the first viewpoint; similarly, in a second time slot, the first-level integrated imaging display structure displays a three-dimensional enhanced image element array corresponding to a second viewpoint, and at the same time, the transparent liquid crystal display panel synchronously displays a parallax image corresponding to the second viewpoint; The distance from the light point at different viewpoints to the second lens array l If different, the optimal viewing distance is d Different; the first viewpoint and the second viewpoint have different optimal viewing distances.

2. A large depth of field display device based on a composite integrated light source as claimed in claim 1, characterized in that: Additional time slots and additional viewpoints are added. In the additional time slots, the first-level integrated imaging display structure displays a three-dimensional enhanced image element array corresponding to the additional viewpoints, and at the same time, the transparent liquid crystal display panel synchronously displays a parallax image corresponding to the additional viewpoints.

3. A large depth of field display device based on a composite integrated light source as claimed in claim 1, characterized in that: A plurality of viewpoints constitute a first viewpoint set, and a plurality of viewpoints constitute a second viewpoint set; in a time-division multiplexed manner, within a first time slot, the first-level integrated imaging display structure displays a three-dimensional enhanced image element array corresponding to the first viewpoint set, and at the same time, the transparent liquid crystal display panel synchronously displays a disparity image corresponding to the first viewpoint set; similarly, within a second time slot, the first-level integrated imaging display structure displays a three-dimensional enhanced image element array corresponding to the second viewpoint set, and at the same time, the transparent liquid crystal display panel synchronously displays a disparity image corresponding to the second viewpoint set.

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

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