JP2007232951A - Stereoscopic display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To view a stereoscopic display screen without wearing a pair of glasses having a polarizing plate for the left eye and that for the right eye. <P>SOLUTION: A partition plate 10 is disposed in a predetermined position opposite a stereoscopic display screen 2 capable of obtaining a video screen whose polarizing characteristic for the left eye is different from that for the right eye. The partition plate 10 is provided with the polarizing plates 11L for the left eye and the polarizing plates 11R for the right eye so that peep windows 11 are formed. The stereoscopic display screen 2 is viewed through the peep windows 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stereoscopic display device using parallax of human eyes suitable for display and explanation in, for example, an exhibition hall and a museum.

Conventionally, as a stereoscopic display device using the parallax of both human eyes, left and right eye video screens with different left-eye and right-eye polarization characteristics are displayed on a stereoscopic display screen, and left-eye and right-eye polarizing plates are provided. There has been proposed a technique in which a stereoscopic image is obtained by wearing eyeglasses (see Patent Document 1 and Patent Document 2).
Japanese Patent Laid-Open No. 10-148996 JP 2005-257901 A

  However, in the above-mentioned stereoscopic display device, it is necessary to wear glasses having polarizing plates for the left eye and right eye. When this stereoscopic display device is used in an exhibition hall, a museum, etc., it is displayed and explained to a visitor. It is necessary to prepare, distribute and collect a large number of glasses having polarizing plates for the left eye and right eye.

  Distributing and collecting glasses with left-eye and right-eye polarizers has the disadvantage of requiring personnel to distribute and collect, as well as the inconvenience of crowding when entering and leaving the glasses. It was.

  In addition, it is necessary to prepare a large number of glasses having polarizing plates for the left eye and right eye, and it is necessary to periodically clean the glasses.

  In view of the above, an object of the present invention is to make it possible to view a stereoscopic display screen without wearing glasses having polarizing plates for left and right eyes.

  The stereoscopic display device of the present invention is provided with a partition plate at a predetermined position facing a stereoscopic display screen from which video images having different polarization characteristics for left eye and right eye are obtained, and polarizing plates for left eye and right eye are provided on the partition plate. The three-dimensional display screen is viewed through the viewing window.

  According to the present invention, a partition plate is provided at a predetermined position facing the stereoscopic display screen, and a polarizing plate for the left eye and the right eye is provided on the partition plate to form a viewing window, and the stereoscopic display screen is viewed through the viewing window. As a result, the stereoscopic display screen can be viewed without wearing glasses having polarizing plates for the left eye and the right eye.

  According to the present invention, the glasses having the polarizing plates for the left eye and the right eye are not distributed and collected, so there is no need to distribute and collect these glasses, and there is no need to distribute and collect these glasses. The flow becomes smooth.

  Moreover, since the partition plate provided with the polarizing plates for the left eye and the right eye is not held by hand like eyeglasses, it is difficult to get dirty and is easy to maintain.

  Hereinafter, an example of the best mode for carrying out the stereoscopic display device of the present invention will be described with reference to FIG. 1, FIG. 2, and FIG.

  In FIG. 1, reference numeral 1 denotes a known stereoscopic video projection apparatus, and reference numeral 2 denotes, for example, an 80-inch screen on which video screens having different left-eye and right-eye polarization characteristics are projected from the stereoscopic video projection apparatus 1. .

  As shown in FIG. 3, this stereoscopic image projection apparatus 1 has a left-eye liquid crystal projector 1S and a right-eye liquid crystal projector 1P arranged vertically so that their optical axes 5 are parallel to each other in the horizontal direction. The 1P image is transmitted through the half mirror 3 and projected onto the screen 2.

  On the other hand, the image of the left-eye liquid crystal projector 1S is reflected by the surface mirror 6 and the half mirror 3 and projected onto the screen 2. Here, the surface mirror 6 and the half mirror 3 are arranged parallel to each other and at an angle of 45 degrees to the optical axis of the right-eye liquid crystal projector 1P and the optical axis of the left-eye liquid crystal projector 1S.

  Furthermore, the projection lens of the left-eye liquid crystal projector 1S is equipped with a filter 4S that rotates the polarization plane so that the outgoing light becomes S waves, and the outgoing light is supplied to the projection lens of the right-eye liquid crystal projector 1P. A filter 4P that rotates the polarization plane so as to be a P wave is attached.

  In this case, by aligning the optical axes of the left-eye liquid crystal projector 1S and the right-eye liquid crystal projector 1P and making the optical path lengths equal to each other, the left-eye image formation surface (left-eye image screen) and the right-eye image connection are displayed. The image plane (right-eye video screen) fits in the same plane on the screen 2, and the left and right eyes overlap with the screen difference depending on the parallax angle. For example, as shown in FIG. 1, a stereoscopic display screen from the stereoscopic video projector 1 can be obtained on the screen 2.

  In this example, as shown in FIGS. 1 and 2, the left-eye video screen and the left-eye video screen on the screen 2 can be viewed at predetermined positions facing the screen 2 from which the stereoscopic display screen is obtained. A plurality of pairs of a polarizing plate 11L for the right eye and a polarizing plate 11R for the right eye are arranged in an inline shape in the vertical direction, and a plate-like wall (partition plate) 10 having a plurality of viewing windows 11, 11, 11. .

  In this case, the left-eye polarizing plate 11L and the right-eye polarizing plate 11R are well-known, and the inner side (screen 2 side) of the plate-like wall (partition plate) 10 is black. Yes.

  In this example, the horizontal interval W between the pair of the left-eye polarizing plate 11L and the right-eye polarizing plate 11R is set to, for example, 65 mm or more between human eyes. In this case, the left and right eyes of a person do not correspond to different pairs of polarizing plates 11L and 11R at the same time.

  In this example, a plurality of viewing windows 11 in which a plurality of pairs of left-eye polarizing plates 11L and right-eye polarizing plates 11R of the plate-like wall (partition plate) 10 are arranged in an inline shape in the vertical direction. , 11, 11... Are provided at a predetermined position in the vicinity of the lower part of the plate-like wall (partition plate) 10 provided with the left-eye polarizing plate 11L or the right-eye polarizing plate 11R.

  Since this example is configured as described above, the observer is not close to the left-eye polarizing plate 11L and the right-eye polarizing plate 11R of the observer's left eye and right eye, respectively, of the plate-like wall (partition plate) 10. Thus, when viewing the screen 2 through this, the left eye can see the left-eye video screen on the screen 2, the right eye can see the right-eye video screen on the screen 2, and the viewer has a stereoscopic image with the parallax angles of both eyes Can see.

  In addition, the observer views the screen 2 from a viewing window 12 having only the polarizing plate 11L for the left eye or the polarizing plate 11R for the right eye at a predetermined position near the lower portion of the plate-like wall (partition plate) 10. The two-dimensional left-eye video screen or right-eye video screen can be clearly seen.

  When the observer views the screen 2 through a plurality of viewing windows 11, 11, 11... Of the plate-like wall (partition plate) 10 from a relatively long distance, the left-eye polarizing plate 11L or the right-eye. Since the screen 2 is viewed through the polarizing plate 11R, a two-dimensional clear image can be seen. Incidentally, when the screen 2 is viewed without passing through the left-eye polarizing plate 11L and the right-eye polarizing plate 11R, the left-eye video screen and the right-eye video screen are superimposed on each other, and are extremely difficult to see.

  According to the above-described example, the plate-like wall (partition plate) 10 is provided at a predetermined position facing the stereoscopic display screen on the screen 2, and the left-eye and right-eye polarizing plates are provided on the plate-like wall (partition plate) 10. Since 11L and 11R are arranged as a viewing window 11 and this stereoscopic display screen is viewed through the viewing window 11, the stereoscopic display screen can be viewed without wearing glasses having polarizing plates for the left and right eyes. Can do.

  According to the above-described example, the glasses having the polarizing plates for the left eye and the right eye are not distributed and collected, so there is no need to distribute and collect these glasses, and it is not necessary to distribute and collect these glasses. The flow becomes smooth.

  Further, according to the above-described example, the plate-like wall (partition plate) 10 provided with the polarizing plates 11L and 11R for the left eye and the right eye is not easily held like a pair of glasses, so it is difficult to be stained and maintained. Easy.

  FIG. 4 shows another example of the best mode for carrying out the present invention. In FIG. 4, reference numeral 20 denotes a stereoscopic color monitor. The stereoscopic color monitor 20 fixes the upper end portion of the half mirror 21 in front of the upper portion of the observation window 22 and the lower end portion of the half mirror 21 to the observation window 22. The half mirror 21 forms a 45-degree surface in the front direction with respect to the horizontal plane.

  A liquid crystal display device 23L having a polarization direction of 45 degrees to the left for displaying a screen for the left eye whose screen is perpendicular to the horizontal plane is fixed to the rear side opposite to the observation window 22 side of the half mirror 21. In this case, the upper side of the liquid crystal display device 23L corresponds to the upper side of the observation window 22, and the lower side of the liquid crystal display device 23L corresponds to the lower side of the observation window 22.

  A liquid crystal display device 23R having a polarization direction of 45 degrees to the left is fixed below the half mirror 21 so as to display a right-eye screen whose screen is horizontal with respect to a horizontal plane. In this case, the upper side of the liquid crystal display device 23R is positioned on the near side, and the lower side of the liquid crystal display device 23R is positioned on the back side.

  Further, the visual axis in the observation window 22 is set to be perpendicular to the center of the screen of the liquid crystal display device 23L that displays the screen for the left eye, and the center of the screen of the liquid crystal display device 23R that displays the screen for the right eye is the visual axis. The half mirror 21 is overlapped.

  In this stereoscopic color monitor 20, the left-eye video signal from the left-eye camera that captures the subject at the left-eye position is supplied to the left-eye liquid crystal display device 23L, and the left-eye video signal is supplied to the left-eye liquid crystal display device. Display in 23L.

  On the other hand, a right-eye video signal from a right-eye camera that captures a subject at the right-eye position is supplied to a right-eye liquid crystal display device 23R via a scanning direction inversion circuit. Processing is performed so that the right side is reversed, and the right-eye video signal is displayed on the right-eye liquid crystal display device 23R.

  In this case, the image light from the left-eye liquid crystal display device 23L is 45-degree linearly polarized light on the left, passes through the half mirror 21 in the left 45-degree state, and the image light from the right-eye liquid crystal display device 23R is left-handed. Although it is 45 degree linearly polarized light, it is reflected by the half mirror 21 and becomes right 45 degree linearly polarized light.

  In this example, as shown in FIG. 4, the left-eye video screen and the right-eye video screen of the observation window 22 are respectively displayed at predetermined positions on the front side corresponding to the observation window 22 from which the stereoscopic display image of the stereoscopic color monitor 20 is obtained. A plurality of pairs of a left-eye polarizing plate 11L and a right-eye polarizing plate 11R that can be seen are arranged in an in-line shape in the vertical direction, and a partition plate 10 having a plurality of viewing windows 11, 11, 11,.

  For example, as shown in FIGS. 5 and 6, the partition plate 10 includes a plurality of pairs of left-eye polarizing plates 11 </ b> L and a right-eye polarizing plate 11 </ b> R made of black synthetic resin having a plurality of pairs of inline windows. A transparent acrylic plate 31 with an AR coating is provided on the front side and the back side of the frame 30a and 30b.

  In this example, the horizontal interval W between the pair of the left-eye polarizing plate 11L and the right-eye polarizing plate 11R is set to, for example, 65 mm or more between human eyes. In this case, the left and right eyes of a person do not correspond to different pairs of polarizing plates 11L and 11R at the same time.

  Since this example is configured as described above, the observer approaches the left eye polarizing plate 11L and the right eye polarizing plate 11R of the partition plate 10 respectively through the observer's left eye and right eye, and through this the observation window 22, the left 45-degree linearly polarized image light coming from the left-eye liquid crystal display device 23 </ b> L is seen by the left eye, and the right 45-degree linearly-polarized video light coming from the right-eye liquid crystal display device 23 </ b> R is seen by the right eye. It can be seen and the observer can obtain a stereoscopic effect with the parallax of both eyes.

  It can be easily understood that the same operational effects as in FIG. 1 can be obtained in the example of FIG.

  In the above-described example, the partition plate 10 having a plurality of pairs of the left-eye polarizing plate 11L and the right-eye polarizing plate 11R arranged in an in-line shape in the vertical direction, and a plurality of viewing windows 11, 11, 11,. As described in the provided example, as shown in FIG. 7, a plurality of pairs of the left-eye polarizing plate 11L and the right-eye polarizing plate 11R are provided in a checkered pattern, and the horizontal distance between the pair and the pair is set. You may make it provide with a space | interval larger than the space | interval of a human both eyes.

  In the above-described example, the horizontal distance W between the pair of the left-eye polarizing plate 11L and the right-eye polarizing plate 11R is described as being more than the distance between both human eyes. It is not necessary that the horizontal interval W between the pair of the polarizing plate 11L and the polarizing plate 11R for the right eye be larger than the interval between the human eyes. In this case, it is possible to place a center mark between the polarizing plate 11L for the left eye and the polarizing plate 11R for the right eye. At this time, when the density of the pair of the polarizing plate 11L for the left eye and the polarizing plate 11R for the right eye is increased, the aperture ratio corresponding to the two-dimensional image when the stereoscopic display screen is viewed from a distance is improved. .

  Further, the present invention is not limited to the above-described example, and various other configurations can be adopted without departing from the gist of the present invention.

It is a block diagram which shows the example of the best form for implementing this invention three-dimensional display apparatus. It is a partially notched top view which shows the example of the principal part of this invention. It is a block diagram which shows the example of a three-dimensional image projector. It is a block diagram which shows the other example of the best form for implementing this invention three-dimensional display apparatus. It is a partially expanded sectional view of the example of the principal part of FIG. It is a disassembled perspective view of the example of the principal part of FIG. It is a top view which shows the other example of the principal part of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Stereoscopic image projection apparatus, 2 ... Screen, 10 ... Partition plate (plate-like wall), 11, 12 ... Window, 11L ... Left-eye polarizing plate, 11R ... Right-eye polarizing plate, 20 ... Stereo color monitor, 21 ... half mirror, 22 ... observation window, 23L ... liquid crystal display device for left eye, 23R ... liquid crystal display device for right eye

Claims (5)

  A partition plate is provided at a predetermined position facing a stereoscopic display screen from which video images with different left-eye and right-eye polarization characteristics can be obtained, and left-eye and right-eye polarizing plates are arranged on the partition plate as a viewing window, A stereoscopic display device characterized in that the stereoscopic display screen is viewed through the viewing window. The stereoscopic display device according to claim 1,
The three-dimensional display device, wherein the viewing window is provided with a plurality of pairs of left-eye and right-eye polarizing plates in an in-line shape in the vertical direction. The stereoscopic display device according to claim 1,
The three-dimensional display device, wherein the viewing window is provided with a plurality of pairs of left-eye and right-eye polarizing plates in a checkered pattern. The stereoscopic display device according to claim 2 or 3,
A three-dimensional display device characterized in that a horizontal distance between the pair of left-eye and right-eye polarizing plates is larger than a distance between both eyes. The stereoscopic display device according to claim 2 or 3,
A three-dimensional display device, wherein a left-eye or right-eye polarizing window is provided near a pair of left-eye and right-eye polarizing windows at a predetermined position of the partition plate.

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