CN114791678A - Double-view 3D display device based on double gradient aperture slit grating - Google Patents
Double-view 3D display device based on double gradient aperture slit grating Download PDFInfo
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- CN114791678A CN114791678A CN202210535775.3A CN202210535775A CN114791678A CN 114791678 A CN114791678 A CN 114791678A CN 202210535775 A CN202210535775 A CN 202210535775A CN 114791678 A CN114791678 A CN 114791678A
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- G—PHYSICS
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- 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
- G02B30/32—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 characterised by the geometry of the parallax barriers, e.g. staggered barriers, slanted parallax arrays or parallax arrays of varying shape or size
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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
- G02B30/22—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
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Abstract
The invention discloses a double-view 3D display device based on a double-gradient-aperture slit grating, wherein a gradient-aperture slit grating I is bilaterally symmetrical by taking a vertical central axis as a center; the aperture-gradually-changed slit grating I is used for light path modulation; the aperture width of the slit I in the gradually-changed aperture slit grating I is gradually reduced from the middle to two sides; the gradually-changed aperture slit grating II is symmetrical left and right by taking a vertical central axis as a center; the gradually-changed aperture slit grating II is used for imaging; the aperture width of the slit II in the gradually-changed aperture slit grating II is gradually increased from the middle to two sides; only the 3D image I can be observed through the polarized glasses I, and only the 3D image II can be observed through the polarized glasses II; at the optimal viewing distance, the viewing angles of the 3D image I and the 3D image II are both proportional to the aperture width of the slit II in the middle of the graded aperture slit grating II.
Description
Technical Field
The invention relates to a 3D display technology, in particular to a double-view 3D display device based on a double gradient aperture slit grating.
Background
The adoption of the gradual-change aperture slit grating can increase the optical efficiency of the integrated imaging double-vision 3D display. Chinese patent CN202021491194.7 proposes a double-view 3D display device based on a gradually-changing aperture slit grating, which includes a display screen, a polarizer, a gradually-changing aperture slit grating, a pair of polarized glasses I and a pair of polarized glasses II; the display screen, the polaroid and the gradually-changed aperture slit grating are arranged in parallel and are correspondingly aligned; the polaroid is tightly attached to the display screen and is positioned between the gradually-changed aperture slit grating and the display screen; the polarizing plate comprises sub-polarizing plate I and sub-polarizing plate IIThe polarization directions are orthogonal; the widths of the sub-polaroid I and the sub-polaroid II are equal to half of the width of the display screen; the sub-polarizing film I is correspondingly aligned with the left half part of the display screen, and the sub-polarizing film II is correspondingly aligned with the right half part of the display screen; the pitches of the slits in the gradually-changed aperture slit grating are the same, and the first pitch of the slits in the gradually-changed aperture slit grating is the sameiAperture width of column slitH i Calculated from the following formula
Wherein,pis the pitch of the slits and is,wis the aperture width of the slit located at the center of the graded aperture slit grating,mis the number of slits in the graded aperture slit grating,lis the viewing distance, the distance between the viewer,gis the distance between the display screen and the gradually-changed aperture slit grating,iis less than or equal tomA positive integer of (a); the display screen is used for displaying the image element array; the image element array comprises an image element I and an image element II, wherein the image element I is positioned in the left half part of the display screen, and the image element II is positioned in the right half part of the display screen; the pitches of the image element I and the image element II are equal to the pitch of the slit; the image element I reconstructs a 3D image I through the sub-polaroid I and the slit which correspond to the image element I, and the 3D image I can be seen only through polarized glasses I; the image element II reconstructs a 3D image II through the sub-polarizer II and the slit corresponding thereto, and can only be seen through the polarized glasses II.
The viewing angle of the 3D image I can be calculated according to the patent figure 1θ 1 And viewing perspective of 3D image IIθ 2 Is composed of
From the above formula, the viewing angles of the 3D image I and the 3D image II are inversely proportional to the aperture width of the slit at the central position of the graded aperture slit grating.
Disclosure of Invention
The invention provides a double-view 3D display device based on double gradient aperture slit gratings, as shown in the attached figure 1, which is characterized by comprising a display screen, a composite polarizing film, a gradient aperture slit grating I, a gradient aperture slit grating II, a pair of polarized glasses I and a pair of polarized glasses II; the display screen, the composite polaroid, the gradient aperture slit grating I and the gradient aperture slit grating II are sequentially arranged in parallel; the composite polaroid is attached to the display screen; the horizontal widths of the display screen, the composite polaroid, the gradually-changed aperture slit grating I and the gradually-changed aperture slit grating II are the same; the vertical widths of the display screen, the composite polarizing film, the gradient aperture slit grating I and the gradient aperture slit grating II are the same; the display screen is used for displaying the composite image element array; the composite picture element array comprises picture elements I and II, as shown in fig. 2; the image element I is positioned on the left half part of the display screen, and the image element II is positioned on the right half part of the display screen; the number of picture elements I is equal to the number of picture elements II; the composite polarizing plate comprises a polarizing plate I and a polarizing plate II, and is shown in figure 3; the polarization direction of the polaroid I is orthogonal to that of the polaroid II; the horizontal width of the polaroid I is equal to that of the polaroid II and equal to half of that of the composite polaroid; the vertical width of the polaroid I and the vertical width of the polaroid II are equal to the vertical width of the composite polaroid; the image element I is correspondingly aligned with the polaroid I, and the image element II is correspondingly aligned with the polaroid II; the polaroid I is used for polarizing the light rays emitted by the image element I, and the polaroid II is used for polarizing the light rays emitted by the image element II; the gradually-changed aperture slit grating I is symmetrical left and right by taking a vertical central axis as a center, as shown in figure 4; the aperture-gradually-changed slit grating I is used for light path modulation; the number of slits I is equal to twice the number of picture elements I; the aperture width of the slit I in the gradually-changed aperture slit grating I is gradually reduced from the middle to two sides;
first in the gradually-changed aperture slit grating IiAperture width of column slit Iw i Calculated by the following formula
Wherein,pis the pitch of the slits I and,ais the aperture width of the slit I in the middle of the gradually-changed aperture slit grating I,gis a display screenThe distance between the aperture of the grating and the gradually-changed aperture slit grating II,dis the distance between the gradually-changed aperture slit grating I and the gradually-changed aperture slit grating II,mis the number of the slits I and,lis the optimal viewing distance; the gradient aperture slit grating II is symmetrical left and right by taking a vertical central axis as a center, as shown in figure 5; the aperture-gradually-changed slit grating II is used for imaging; the number of the slits II is equal to the number of the slits I; the aperture width of the slit II in the gradually-changed aperture slit grating II is gradually increased from the middle to two sides; the first in the gradual change aperture slit grating IIiAperture width of column slit IIv i Calculated from the following formula
The pitches of the image element I, the image element II, the slit I and the slit II are the same; the centers of the image elements I are correspondingly aligned with the centers of the corresponding slits I and II; the centers of the image elements II are correspondingly aligned with the centers of the corresponding slits I and II; spacing between gradient aperture slit grating I and gradient aperture slit grating IIdSatisfies the following formula
Wherein,v 1 the aperture width of the 1 st line of slits II in the gradually-changed aperture slit grating II; the polarization direction of the polarization glasses I is the same as that of the polaroid I, and the polarization direction of the polarization glasses II is the same as that of the polaroid II; the polarization glasses I and the polarization glasses II are used for separating the 3D image I and the 3D image II; a part of light rays emitted by the image element I pass through the polaroid I and the corresponding slit I and slit II in sequence and are projected to the imaging region I to reconstruct a 3D image I; a part of light rays emitted by the image element II are projected to an imaging region II through a polaroid II and a corresponding slit I and a slit II in sequence to reconstruct a 3D image II; only the 3D image I can be observed through the polarized glasses I, and only the 3D image II can be observed through the polarized glasses II; viewing perspective of 3D image I at optimal viewing distanceθ 1 And viewing perspective of 3D image IIθ 2 Is composed of
Wherein,
the aperture width of a slit II positioned in the middle of a gradually-changed aperture slit grating II; the viewing angles of the 3D image I and the 3D image II are both in direct proportion to the aperture width of the slit II in the middle of the gradually-changed aperture slit grating II.
Drawings
FIG. 1 is a schematic view of the present invention
FIG. 2 is a schematic diagram of a composite image element array according to the present invention
FIG. 3 is a schematic view of a composite polarizing plate of the present invention
FIG. 4 is a schematic diagram of a graded aperture slit grating I according to the present invention
FIG. 5 is a schematic diagram of a graded aperture slit grating II according to the present invention
The reference numbers in the figures are:
1. the display screen, 2, the composite polaroid, 3, the gradual change aperture slit grating I, 4, the gradual change aperture 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 invention. It should be noted that the following examples are given by way of illustration only and should not be construed as limiting the scope of the present invention, which is intended to be encompassed by the present invention as set forth herein.
The invention provides a double-view 3D display device based on double gradient aperture slit gratings, as shown in the attached figure 1, which is characterized by comprising a display screen, a composite polarizing film, a gradient aperture slit grating I, a gradient aperture slit grating II, a pair of polarized glasses I and a pair of polarized glasses II; the display screen, the composite polaroid, the gradient aperture slit grating I and the gradient aperture slit grating II are sequentially arranged in parallel; the composite polaroid is attached to the display screen; the horizontal widths of the display screen, the composite polarizing film, the gradient aperture slit grating I and the gradient aperture slit grating II are the same; the vertical widths of the display screen, the composite polaroid, the gradient aperture slit grating I and the gradient aperture slit grating II are the same; the display screen is used for displaying the composite image element array; the composite image element array comprises image elements I and II, as shown in FIG. 2; the image element I is positioned in the left half part of the display screen, and the image element II is positioned in the right half part of the display screen; the number of picture elements I is equal to the number of picture elements II; the composite polarizing plate comprises a polarizing plate I and a polarizing plate II, and is shown in figure 3; the polarization direction of the polaroid I is orthogonal to that of the polaroid II; the horizontal width of the polaroid I is equal to that of the polaroid II and equal to half of that of the composite polaroid; the vertical width of the polaroid I and the vertical width of the polaroid II are equal to the vertical width of the composite polaroid; the image element I is correspondingly aligned with the polaroid I, and the image element II is correspondingly aligned with the polaroid II; the polaroid I is used for polarizing the light rays emitted by the image element I, and the polaroid II is used for polarizing the light rays emitted by the image element II; the gradually-changed aperture slit grating I is symmetrical left and right by taking a vertical central axis as a center, as shown in figure 4; the aperture-gradually-changed slit grating I is used for light path modulation; the number of slits I is equal to twice the number of picture elements I; the aperture width of the slit I in the gradually-changed aperture slit grating I is gradually reduced from the middle to two sides;
first in the gradually-changed aperture slit grating IiAperture width of column slit Iw i Calculated by the following formula
Wherein,pis the pitch of the slits I and,ais the aperture width of the slit I in the middle of the gradually-changed aperture slit grating I,gis a display screen and a gradual change holeThe distance between the radial slit grating II and the radial slit grating II,dis the distance between the gradually-changed aperture slit grating I and the gradually-changed aperture slit grating II,mis the number of the slits I and,lis the optimal viewing distance; the gradient aperture slit grating II is symmetrical left and right by taking a vertical central axis as a center, as shown in figure 5; the gradually-changed aperture slit grating II is used for imaging; the number of the slits II is equal to the number of the slits I; the aperture width of the slit II in the gradually-changed aperture slit grating II is gradually increased from the middle to two sides; second in the gradual change aperture slit grating IIiAperture width of column slit IIv i Calculated from the following formula
The pitches of the image element I, the image element II, the slit I and the slit II are the same; the centers of the image elements I are correspondingly aligned with the centers of the corresponding slits I and II; the centers of the image elements II are correspondingly aligned with the centers of the corresponding slits I and II; spacing between gradient aperture slit grating I and gradient aperture slit grating IIdSatisfies the following formula
Wherein,v 1 the aperture width of the 1 st line of slits II in the gradually-changed aperture slit grating II; the polarization direction of the polarization glasses I is the same as that of the polaroid I, and the polarization direction of the polarization glasses II is the same as that of the polaroid II; the polarization glasses I and the polarization glasses II are used for separating the 3D image I and the 3D image II; a part of light rays emitted by the image element I pass through the polaroid I and the corresponding slit I and slit II in sequence and are projected to the imaging region I to reconstruct a 3D image I; a part of light rays emitted by the image element II are projected to an imaging region II through a polaroid II and a corresponding slit I and a slit II in sequence to reconstruct a 3D image II; only the 3D image I can be observed through the polarized glasses I, and only the 3D image II can be observed through the polarized glasses II; viewing perspective of 3D image I at optimal viewing distanceθ 1 And viewing perspective of 3D image IIθ 2 Is composed of
Wherein,
the aperture width of a slit II in the middle of a gradually-changed aperture slit grating II is shown; the viewing angles of the 3D image I and the 3D image II are both in direct proportion to the aperture width of the slit II in the middle of the gradually-changed aperture slit grating II.
The pitch of the slit I is 10mm, the aperture width of the slit I in the middle of the gradually-changed aperture slit grating I is 5.44mm, the distance between the display screen and the gradually-changed aperture slit grating II is 10mm, the distance between the gradually-changed aperture slit grating I and the gradually-changed aperture slit grating II is 6mm, the optimal viewing distance is 990mm, and the number of the slits I is 8, so that the aperture widths of the 1 st to 8 th rows of slits I in the gradually-changed aperture slit grating I are respectively 5.2mm, 5.28mm, 5.36mm, 5.44mm, 5.36mm, 5.28mm and 5.2mm through calculation of a formula (1); the aperture widths of 1 st to 8 th rows of slits II in the gradually-changed aperture slit grating II are respectively 2mm, 1.8mm, 1.6mm, 1.4mm, 1.6mm, 1.8mm and 2mm through calculation of the formula (2); as calculated by equation (4), the viewing angles of the 3D image I and the 3D image II are both 61 °. In the prior art scheme based on the above parameters, the viewing angles of the 3D image I and the 3D image II are both 43 °.
Claims (1)
1. The double-view 3D display device based on the double gradient aperture slit grating is characterized by comprising a display screen, a composite polarizing film, a gradient aperture slit grating I, a gradient aperture slit grating II, a pair of polarizing glasses I and a pair of polarizing glasses II; the display screen, the composite polarizing film, the gradient aperture slit grating I and the gradient aperture slit grating II are sequentially placed in parallel; the composite polaroid is attached to the display screen; the horizontal widths of the display screen, the composite polaroid, the gradually-changed aperture slit grating I and the gradually-changed aperture slit grating II are the same; the vertical widths of the display screen, the composite polaroid, the gradient aperture slit grating I and the gradient aperture slit grating II are the same; display screenFor displaying a 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 in the left half part of the display screen, and the image element II is positioned in the right half part of the display screen; the number of picture elements I is equal to the number of picture elements II; the composite polaroid comprises a polaroid I and a polaroid II; the polarization direction of the polaroid I is orthogonal to that of the polaroid II; the horizontal width of the polaroid I is equal to that of the polaroid II and equal to half of that of the composite polaroid; the vertical width of the polaroid I and the vertical width of the polaroid II are equal to the vertical width of the composite polaroid; the image element I is correspondingly aligned with the polaroid I, and the image element II is correspondingly aligned with the polaroid II; the polaroid I is used for polarizing light rays emitted by the image element I, and the polaroid II is used for polarizing light rays emitted by the image element II; the gradient aperture slit grating I is symmetrical left and right by taking a vertical central axis as a center; the aperture-gradually-changed slit grating I is used for light path modulation; the number of slits I is equal to twice the number of picture elements I; the aperture width of the slit I in the gradually-changed aperture slit grating I is gradually reduced from the middle to two sides; first in the gradually-changed aperture slit grating IiAperture width of column slit Iw i Calculated by the following formula
Wherein,pis the pitch of the slits I and,ais the aperture width of the slit I in the middle of the gradually-changed aperture slit grating I,gis the distance between the display screen and the gradually-changed aperture slit grating II,dis the distance between the gradually-changed aperture slit grating I and the gradually-changed aperture slit grating II,mis the number of the slits I and,lis the optimal viewing distance; the gradient aperture slit grating II is symmetrical left and right by taking a vertical central axis as a center; the aperture-gradually-changed slit grating II is used for imaging; the number of the slits II is equal to the number of the slits I; the aperture width of the slit II in the gradually-changed aperture slit grating II is gradually increased from the middle to two sides; second in the gradual change aperture slit grating IIiAperture width of column slit IIv i Calculated from the following formula
The pitches of the image element I, the image element II, the slit I and the slit II are the same; the center of the image element I is correspondingly aligned with the centers of the corresponding slit I and the slit II; the centers of the image elements II are correspondingly aligned with the centers of the corresponding slits I and II; the distance between the gradually-changed aperture slit grating I and the gradually-changed aperture slit grating IIdSatisfies the following formula
Wherein,v 1 the aperture width of the 1 st line of slits II in the gradually-changed aperture slit grating II; the polarization direction of the polarization glasses I is the same as that of the polarizer I, and the polarization direction of the polarization glasses II is the same as that of the polarizer II; the polarization glasses I and the polarization glasses II are used for separating the 3D image I and the 3D image II; a part of light rays emitted by the image element I pass through the polaroid I and the corresponding slit I and slit II in sequence and are projected to the imaging region I to reconstruct a 3D image I; a part of light rays emitted by the image element II are projected to an imaging region II through a polaroid II and a corresponding slit I and a slit II in sequence to reconstruct a 3D image II; only the 3D image I can be observed through the polarized glasses I, and only the 3D image II can be observed through the polarized glasses II; viewing perspective of 3D image I at optimal viewing distanceθ 1 And viewing perspective of 3D image IIθ 2 Is composed of
Wherein,
the aperture width of a slit II positioned in the middle of a gradually-changed aperture slit grating II; viewing angles of the 3D image I and the 3D image II are both equal to that of the slit II in the middle of the gradually-changed aperture slit grating IIThe aperture width is proportional.
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