CN115145049B - Double-vision 3D display device based on composite polaroid - Google Patents

Double-vision 3D display device based on composite polaroid Download PDF

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Publication number
CN115145049B
CN115145049B CN202210535788.0A CN202210535788A CN115145049B CN 115145049 B CN115145049 B CN 115145049B CN 202210535788 A CN202210535788 A CN 202210535788A CN 115145049 B CN115145049 B CN 115145049B
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image element
slits
image
polaroid
composite
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CN115145049A (en
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吴非
范钧
樊为
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Chengdu Technological University CDTU
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Chengdu Technological University CDTU
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

The invention discloses a double-vision 3D display device based on a composite polaroid, wherein a slit grating I is used for modulating an optical path; the slit grating II is used for imaging; a part of light rays emitted by the image element I are respectively projected to an imaging area I through a polaroid I, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images I are reconstructed, and the 3D images I are combined into a high-resolution 3D image I in a viewing area I; a part of light rays emitted by the image element II are respectively projected to an imaging area II through a polaroid II, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images II are reconstructed, and the 3D images II are combined into a high-resolution 3D image II in a viewing area II; only the 3D image I can be seen through the polarized glasses I, and only the 3D image II can be seen through the polarized glasses II; the viewing angles of both the 3D image I and the 3D image II are proportional to the aperture width of the slit II.

Description

Double-vision 3D display device based on composite polaroid
Technical Field
The invention relates to a 3D display technology, in particular to a double-vision 3D display device based on a composite polaroid.
Background
Chinese patent 201910442396.8 proposes an integrated imaging double-vision 3D display device, which comprises a display screen, a polaroid, a pinhole array, polarized glasses I and polarized glasses II; the display screen is used for displaying a micro-image array, the micro-image array consists of a sub-micro-image array I and a sub-micro-image array II, the sub-micro-image array I consists of image elements I which are continuously arranged and positioned at the left half part of the micro-image array, and the sub-micro-image array II consists of image elements II which are continuously arranged and positioned at the right half part of the micro-image array; the polaroid is attached to the display screen and is positioned between the display screen and the pinhole array; the pinhole arrays are arranged in parallel in front of the polaroid and aligned correspondingly; the pinhole array comprises a plurality of groups of light holes; the polaroid consists of a sub-polaroid I and a sub-polaroid II, and the sub-polaroid I is orthogonal to the polarization direction of the sub-polaroid II; the polarization direction of the polarized glasses I is the same as that of the sub-polaroid I, and the polarization direction of the polarized glasses II is the same as that of the sub-polaroid II; the sub-microimage array I is correspondingly aligned with the sub-polaroid I, and the sub-microimage array II is correspondingly aligned with the sub-polaroid II; the pitch of the light holes, the pitch of the image elements I and the pitch of the image elements II are the same; the number of each group of light holes is equal to the sum of the number of the image elements I and the number of the image elements II in the micro-image array; the spacing between two adjacent groups of light holes is the same; the plurality of light holes corresponding to the same image element I are symmetrical with the center of the image element I as the center; the plurality of light holes corresponding to the same image element II are symmetrical with the center of the image element II as the center; the thickness t of the pinhole array is
Wherein p is the pitch of the light holes, v is the vertical width of the light holes, g is the distance between the display screen and the pinhole array, z is the number of groups of light holes, and a is the vertical distance between two adjacent groups of light holes; the sub-micro image array I reconstructs a plurality of 3D images I through a plurality of groups of light holes, and the 3D images I are combined into a high-resolution 3D image I in a viewing area and can only be seen through polarized glasses I; the sub-micro image array II reconstructs a plurality of 3D images II through a plurality of groups of light holes, and the 3D images II are combined into a high-resolution 3D image II in a viewing area and can only be seen through polarized glasses II. According to the technical scheme, the resolution of the 3D image I and the resolution of the 3D image II can be effectively improved. According to FIG. 5 of China patent 201910442396.8, the viewing angle θ 1 of 3D image I and viewing angle θ 2 of 3D image II are calculated as
Where m is the number of picture elements I in the horizontal direction and l is the viewing distance. As can be seen from the two formulas above, on the one hand: the thickness of the pinhole in the prior art needs to meet a specific relation, and the thickness of the pinhole is in direct proportion to the vertical width of the light-transmitting pinhole; on the other hand: the viewing angle of the 3D image I and the horizontal viewing angle of the 3D image II of the prior art scheme are both inversely proportional to the thickness of the pinhole. Therefore, the application range of the prior art scheme is limited.
Disclosure of Invention
The invention provides a double-vision 3D display device based on a composite polaroid, which is shown in a figure 1 and is characterized by comprising a display screen, the composite polaroid, a slit grating I, a slit grating II, polarized glasses I and polarized glasses II; the display screen, the composite polaroid, the slit grating I and the slit grating II are sequentially arranged in parallel; the composite polaroid is attached to the display screen; the display screen is used for displaying the composite image element array; the composite image element array comprises image elements I and image elements II, as shown in figure 2; the image element I is positioned at the left half part of the display screen, and the image element II is positioned at the right half part of the display screen; the number of picture elements I is equal to the number of picture elements II; the pitch of picture elements I is equal to the pitch of picture elements II; the composite polarizer comprises a polarizer I and a polarizer II, as shown in FIG. 3; the horizontal width of the polarizer I is equal to the horizontal width of the polarizer II; the image element I is correspondingly aligned with the polaroid I, and the image element II is correspondingly aligned with the polaroid II; the polarization direction of the polaroid I is orthogonal to the polarization direction of the polaroid II; the polarizer I is used for polarizing the light rays emitted by the image element I, and the polarizer II is used for polarizing the light rays emitted by the image element II;
The slit grating I is used for modulating an optical path; the slit grating II is used for imaging; the number of slits II is equal to the number of slits I; each image element I corresponds to a plurality of slits I, and each image element I corresponds to a plurality of slits II; each image element II corresponds to a plurality of slits I, and each image element II corresponds to a plurality of slits II; the number of the slits I corresponding to each image element I, the number of the slits II corresponding to each image element I, the number of the slits I corresponding to each image element II and the number of the slits II corresponding to each image element II are the same; the plurality of slits I corresponding to each image element I are symmetrical with the center of the image element I as the center, and the plurality of slits II corresponding to each image element I are symmetrical with the center of the image element I as the center; the plurality of slits I corresponding to each image element II are symmetrical with the center of the image element II as the center, and the plurality of slits II corresponding to each image element II are symmetrical with the center of the image element II as the center; the adjacent interval width of the plurality of slits I corresponding to each image element I and the adjacent interval width of the plurality of slits I corresponding to each image element II are the same; the adjacent interval width of the plurality of slits II corresponding to each image element I and the adjacent interval width of the plurality of slits II corresponding to each image element II are the same;
the aperture width w of the slit I and the adjacent interval width a of the plurality of slits I corresponding to each image element I are calculated by the following formula
（1）
（2）
Wherein p is the pitch of the image elements I, n is the number of slits I corresponding to each image element I, v is the aperture width of the slits II, b is the adjacent interval width of a plurality of slits II corresponding to each image element I, d is the interval between the slit gratings I and II, and g is the interval between the display screen and the slit grating II;
the distance d between the slit grating I and the slit grating II meets the following condition
（3）
A part of light rays emitted by the image element I are respectively projected to an imaging area I through a polaroid I, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images I are reconstructed, and the 3D images I are combined into a high-resolution 3D image I in a viewing area I; a part of light rays emitted by the image element II are respectively projected to an imaging area II through a polaroid II, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images II are reconstructed, and the 3D images II are combined into a high-resolution 3D image II in a viewing area II; the polarization direction of the polarized glasses I is the same as that of the polarized sheet I, and the polarization direction of the polarized glasses II is the same as that of the polarized sheet II; the polarized glasses I and the polarized glasses II are used for separating the 3D image I and the 3D image II; only the 3D image I can be seen through the polarized glasses I, and only the 3D image II can be seen through the polarized glasses II; the viewing angle θ 1 of the 3D image I and the viewing angle θ 2 of the 3D image II are calculated by the following formula
（4）
Where l is the viewing distance and m is the number of picture elements I; the viewing angles of both the 3D image I and the 3D image II are proportional to the aperture width of the slit II.
Drawings
FIG. 1 is a schematic diagram of the present invention
FIG. 2 is a schematic diagram of a composite pixel array according to the present invention
FIG. 3 is a schematic view of a composite polarizer of the present invention
The graphic reference numerals in the above figures are:
1. The display screen, 2, the compound polaroid, 3, the slit grating I,4, the slit grating II,5, the polarized glasses I,6, the polarized glasses II,7, the image element I,8, the image element II,9, the polaroid I,10, the polaroid II.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description of an exemplary embodiment of the present invention. It is noted that the following examples are given for the purpose of illustration only and are not to be construed as limiting the scope of the invention, since numerous insubstantial modifications and adaptations of the invention will be within the scope of the invention as viewed by one skilled in the art from the foregoing disclosure.
The invention provides a double-vision 3D display device based on a composite polaroid, which is shown in a figure 1 and is characterized by comprising a display screen, the composite polaroid, a slit grating I, a slit grating II, polarized glasses I and polarized glasses II; the display screen, the composite polaroid, the slit grating I and the slit grating II are sequentially arranged in parallel; the composite polaroid is attached to the display screen; the display screen is used for displaying the composite image element array; the composite image element array comprises image elements I and image elements II, as shown in figure 2; the image element I is positioned at the left half part of the display screen, and the image element II is positioned at the right half part of the display screen; the number of picture elements I is equal to the number of picture elements II; the pitch of picture elements I is equal to the pitch of picture elements II; the composite polarizer comprises a polarizer I and a polarizer II, as shown in FIG. 3; the horizontal width of the polarizer I is equal to the horizontal width of the polarizer II; the image element I is correspondingly aligned with the polaroid I, and the image element II is correspondingly aligned with the polaroid II; the polarization direction of the polaroid I is orthogonal to the polarization direction of the polaroid II; the polarizer I is used for polarizing the light rays emitted by the image element I, and the polarizer II is used for polarizing the light rays emitted by the image element II;
The slit grating I is used for modulating an optical path; the slit grating II is used for imaging; the number of slits II is equal to the number of slits I; each image element I corresponds to a plurality of slits I, and each image element I corresponds to a plurality of slits II; each image element II corresponds to a plurality of slits I, and each image element II corresponds to a plurality of slits II; the number of the slits I corresponding to each image element I, the number of the slits II corresponding to each image element I, the number of the slits I corresponding to each image element II and the number of the slits II corresponding to each image element II are the same; the plurality of slits I corresponding to each image element I are symmetrical with the center of the image element I as the center, and the plurality of slits II corresponding to each image element I are symmetrical with the center of the image element I as the center; the plurality of slits I corresponding to each image element II are symmetrical with the center of the image element II as the center, and the plurality of slits II corresponding to each image element II are symmetrical with the center of the image element II as the center; the adjacent interval width of the plurality of slits I corresponding to each image element I and the adjacent interval width of the plurality of slits I corresponding to each image element II are the same; the adjacent interval width of the plurality of slits II corresponding to each image element I and the adjacent interval width of the plurality of slits II corresponding to each image element II are the same;
the aperture width w of the slit I and the adjacent interval width a of the plurality of slits I corresponding to each image element I are calculated by the following formula
（1）
（2）
Wherein p is the pitch of the image elements I, n is the number of slits I corresponding to each image element I, v is the aperture width of the slits II, b is the adjacent interval width of a plurality of slits II corresponding to each image element I, d is the interval between the slit gratings I and II, and g is the interval between the display screen and the slit grating II;
the distance d between the slit grating I and the slit grating II meets the following condition
（3）
A part of light rays emitted by the image element I are respectively projected to an imaging area I through a polaroid I, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images I are reconstructed, and the 3D images I are combined into a high-resolution 3D image I in a viewing area I; a part of light rays emitted by the image element II are respectively projected to an imaging area II through a polaroid II, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images II are reconstructed, and the 3D images II are combined into a high-resolution 3D image II in a viewing area II; the polarization direction of the polarized glasses I is the same as that of the polarized sheet I, and the polarization direction of the polarized glasses II is the same as that of the polarized sheet II; the polarized glasses I and the polarized glasses II are used for separating the 3D image I and the 3D image II; only the 3D image I can be seen through the polarized glasses I, and only the 3D image II can be seen through the polarized glasses II; the viewing angle θ 1 of the 3D image I and the viewing angle θ 2 of the 3D image II are calculated by the following formula
（4）
Where l is the viewing distance and m is the number of picture elements I; the viewing angles of both the 3D image I and the 3D image II are proportional to the aperture width of the slit II.
The pitch of the image elements I is 10mm, the aperture width of the slit II is 1mm, the number of the slits I corresponding to each image element I is 2, the adjacent interval width of the plurality of slits II corresponding to each image element I is 4mm, the distance between the display screen and the slit grating II is 6mm, the distance between the slit grating I and the slit grating II is 3mm, the viewing distance is 500mm, and the number of the image elements I is 31, the aperture width of the slit I is 2mm calculated by the formula (1); calculating from the formula (2), wherein the adjacent interval width of the plurality of slits I corresponding to each image element I is 3mm; the viewing angles of the 3D image I and the 3D image II calculated from the formula (4) are each 62 °. In the prior art scheme based on the above parameters, the viewing angles of both the 3D image I and the 3D image II are 40 °.

Claims (1)

1. The double-vision 3D display device based on the composite polaroid is characterized by comprising a display screen, the composite polaroid, a slit grating I, a slit grating II, polarized glasses I and polarized glasses II; the display screen, the composite polaroid, the slit grating I and the slit grating II are sequentially arranged in parallel; the composite polaroid is attached to the display screen; the display screen is used for displaying the composite image element array; the composite image element array comprises an image element I and an image element II; the image element I is positioned at the left half part of the display screen, and the image element II is positioned at the right half part of the display screen; the number of picture elements I is equal to the number of picture elements II; the pitch of picture elements I is equal to the pitch of picture elements II; the composite polaroid comprises a polaroid I and a polaroid II; the horizontal width of the polarizer I is equal to the horizontal width of the polarizer II; the image element I is correspondingly aligned with the polaroid I, and the image element II is correspondingly aligned with the polaroid II; the polarization direction of the polaroid I is orthogonal to the polarization direction of the polaroid II; the polarizer I is used for polarizing the light rays emitted by the image element I, and the polarizer II is used for polarizing the light rays emitted by the image element II; the slit grating I is used for modulating an optical path; the slit grating II is used for imaging; the number of slits II is equal to the number of slits I; each image element I corresponds to a plurality of slits I, and each image element I corresponds to a plurality of slits II; each image element II corresponds to a plurality of slits I, and each image element II corresponds to a plurality of slits II; the number of the slits I corresponding to each image element I, the number of the slits II corresponding to each image element I, the number of the slits I corresponding to each image element II and the number of the slits II corresponding to each image element II are the same; the plurality of slits I corresponding to each image element I are symmetrical with the center of the image element I as the center, and the plurality of slits II corresponding to each image element I are symmetrical with the center of the image element I as the center; the plurality of slits I corresponding to each image element II are symmetrical with the center of the image element II as the center, and the plurality of slits II corresponding to each image element II are symmetrical with the center of the image element II as the center; the adjacent interval width of the plurality of slits I corresponding to each image element I and the adjacent interval width of the plurality of slits I corresponding to each image element II are the same; the adjacent interval width of the plurality of slits II corresponding to each image element I and the adjacent interval width of the plurality of slits II corresponding to each image element II are the same; the aperture width w of the slit I and the adjacent interval width a of the plurality of slits I corresponding to each image element I are calculated by the following formula
Wherein p is the pitch of the image elements I, n is the number of slits I corresponding to each image element I, v is the aperture width of the slits II, b is the adjacent interval width of a plurality of slits II corresponding to each image element I, d is the interval between the slit gratings I and II, and g is the interval between the display screen and the slit grating II;
the distance d between the slit grating I and the slit grating II meets the following condition
A part of light rays emitted by the image element I are respectively projected to an imaging area I through a polaroid I, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images I are reconstructed, and the 3D images I are combined into a high-resolution 3D image I in a viewing area I; a part of light rays emitted by the image element II are respectively projected to an imaging area II through a polaroid II, a plurality of corresponding slits I and a plurality of corresponding slits II, a plurality of 3D images II are reconstructed, and the 3D images II are combined into a high-resolution 3D image II in a viewing area II; the polarization direction of the polarized glasses I is the same as that of the polarized sheet I, and the polarization direction of the polarized glasses II is the same as that of the polarized sheet II; the polarized glasses I and the polarized glasses II are used for separating the 3D image I and the 3D image II; only the 3D image I can be seen through the polarized glasses I, and only the 3D image II can be seen through the polarized glasses II; the viewing angle θ 1 of the 3D image I and the viewing angle θ 2 of the 3D image II are calculated by the following formula
Where l is the viewing distance and m is the number of picture elements I; the viewing angles of both the 3D image I and the 3D image II are proportional to the aperture width of the slit II.
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