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WO2013061439A1 - Dispositif d'affichage vidéo en trois dimensions - Google Patents

Dispositif d'affichage vidéo en trois dimensions Download PDF

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Publication number
WO2013061439A1
WO2013061439A1 PCT/JP2011/074791 JP2011074791W WO2013061439A1 WO 2013061439 A1 WO2013061439 A1 WO 2013061439A1 JP 2011074791 W JP2011074791 W JP 2011074791W WO 2013061439 A1 WO2013061439 A1 WO 2013061439A1
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WO
WIPO (PCT)
Prior art keywords
display screen
eyepiece
angle
mirror
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/074791
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English (en)
Japanese (ja)
Inventor
一雄 関家
望月　亮
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ASMITAS Technology Inc
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ASMITAS Technology Inc
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Publication date
Application filed by ASMITAS Technology Inc filed Critical ASMITAS Technology Inc
Priority to PCT/JP2011/074791 priority Critical patent/WO2013061439A1/fr
Publication of WO2013061439A1 publication Critical patent/WO2013061439A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/001—Eyepieces
    • 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
    • G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
    • G02B30/35—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using reflective optical elements in the optical path between the images and the observer
    • 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]
    • H04N13/344—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] with head-mounted left-right displays

Definitions

  • the present invention relates to a stereoscopic image display device.
  • stereoscopic video display devices that display binocular stereoscopic left and right images captured by an imaging device on a pair of left and right video display devices and stereoscopically view through a pair of left and right eyepieces have become widespread.
  • stereoscopic image display devices used in operations such as medical diagnosis reduce the fatigue of the operator during surgery and the like, and display characteristics equivalent to those observed with an optical microscope are required.
  • the stereoscopic image display device uses a normal color filter type liquid crystal display device (hereinafter referred to as “CF-LCD”) as the image display device, thereby improving resolution and color reproducibility compared with the case of using a CRT display.
  • CF-LCD normal color filter type liquid crystal display device
  • the present invention provides an image projected on the virtual image plane using a pair of left and right eyepieces arranged so that optical axes orthogonal to the virtual image plane are parallel to each other.
  • a stereoscopic image display device that stereoscopically displays a left-side image for binocular stereoscopic viewing that is mirror-inverted and having a first display screen that displays the left-side image with a definition corresponding to an HDTV (high-definition television) system
  • a color sequential display type second liquid crystal display device having a size corresponding to an angle of view of the left eyepiece, and an image displayed on the first display screen is within the angle of view.
  • the eyepiece is formed in a size corresponding to the angle of view of the first mirror placed on the right side and the eyepiece on the right side, and the image displayed on the second display screen is within this angle of view.
  • a second mirror disposed at a predetermined angle with respect to the optical axis.
  • a color sequential display type field sequential color type: FSC type
  • FSC type field sequential color type
  • FIG. 1 is a diagram schematically illustrating the appearance of a stereoscopic video display apparatus according to an embodiment of the present invention.
  • FIG. 2 is a first diagram for explaining an arrangement relationship of a display screen or the like for stereoscopic viewing on the stereoscopic video display device.
  • FIG. 3 is a second diagram for explaining the arrangement relationship of a display screen and the like for stereoscopic viewing on the stereoscopic video display device.
  • FIG. 1 is a diagram schematically showing the appearance of a stereoscopic video display device 100 according to an embodiment of the present invention.
  • FIG. 2 shows the arrangement relationship of display screens and the like for stereoscopic viewing on the stereoscopic video display device 100.
  • FIG. 3 is a first diagram for explaining the arrangement relationship of a display screen and the like for stereoscopic viewing on the stereoscopic video display device 100.
  • the three-dimensional image display device 100 mainly includes a left display device 6a which is a color sequential display type liquid crystal display device (FSC-LCD) corresponding to the left eyepiece 2a and an FSC-LCD corresponding to the right eyepiece 2b.
  • a right mirror 5b that leads to the right eyepiece 2b and a case 1 are provided.
  • the left display device 6a has a left display screen 4a that displays a left-side image for binocular stereoscopic viewing that is mirror-inverted with a definition corresponding to an HDTV (high definition television) system.
  • the right display device 6b is disposed in parallel to the left display screen 4a at a position facing the left display screen 4a, and displays a right image for binocular stereoscopic viewing that is mirror-inverted with the above-mentioned definition. It has a screen 4b.
  • the stereoscopic video display device 100 When the stereoscopic video display device 100 is used for medical purposes, it corresponds to Full-HD. It is desirable to have a definition (horizontal 1920 ⁇ vertical 1080).
  • the left eyepiece 2a and the right eyepiece 2b are provided in the case 1, the left eyepiece 2a is provided with an eyepiece 3a, and the right eyepiece 2b is provided with an eyepiece 3b.
  • the pair of left and right eyepieces 3a and 3b has an optical axis 10 that is parallel to the left display screen 4a and the right display screen 4b and extends in the horizontal direction, and the left display screen 4a and the right display screen 4b are opposed to each other. And located on the end side in the longitudinal direction (lower side in FIG. 2) from the center of each display screen (4a, 4b).
  • the optical axes 10 of the eyepieces 3a and 3b are provided in parallel with each other at a width (eye width b: average of about 65 mm) between the center of the left eye P and the center of the right eye P.
  • a left mirror 5a and a right mirror 5b are arranged in an inverted C shape toward the eyepieces 3a and 3b.
  • the left mirror 5a As the distance from the eyepiece 2a increases, the distance from the left display screen 4a decreases.
  • the right mirror 5b decreases from the right eyepiece 2b as the distance from the right display screen 4b decreases. Has been.
  • the left mirror 5a is formed in a size corresponding to the angle of view of the eyepiece 3a (horizontal angle of view ⁇ and vertical angle of view) so as to guide the image displayed on the left display screen 4a to the eyepiece 3a. Further, they are arranged at a predetermined angle (mirror angle ⁇ ) with respect to the optical axis 10 of the eyepiece 3a.
  • the left display screen 4a side end of the left mirror 5a is provided at a position in contact with the extension line g1a of the horizontal angle of view ⁇ with respect to the optical axis 10 of the eyepiece 3a, and the eyepiece 3a side end of the left mirror 5a.
  • the left mirror 5a is provided with a mirror angle ⁇ of, for example, 45 ° so that the optical axis 10 of the eyepiece 3a is perpendicularly incident near the center of the left display screen 4a.
  • the lengths of the bases of the isosceles triangles having the same length of each hypotenuse (extension lines g1a, g1b) having the angle of view ⁇ as the apex angle are the same as the horizontal width H of the left display screen 4a. That is, the left display screen 4a is disposed at a position where the optical axis 10 of the eyepiece lens 3a is folded back by the left mirror 5a from a position that should originally be in front of the left eyepiece 2a (the base).
  • the right mirror 5b is formed to have a size corresponding to the angle of view of the eyepiece 3b (horizontal angle of view ⁇ and vertical angle of view), and the image displayed on the right display screen 4b is directed to the eyepiece 3b. In order to guide, it is arranged at a predetermined angle (mirror angle ⁇ ) with respect to the optical axis 10 of the eyepiece 3b.
  • the right side display screen 4b side end of the right mirror 5b is provided at a position in contact with the extension line g2a of the horizontal angle of view ⁇ with respect to the optical axis 10 of the eyepiece 3b, and the eyepiece 3b side end of the right mirror 5b.
  • the right mirror 5b is provided with a mirror angle ⁇ of 45 °, for example, so that the optical axis 10 of the eyepiece 3b is perpendicularly incident near the center of the right display screen 4b.
  • the lengths of the bases of the isosceles triangles having the same hypotenuses (extension lines g2a, g2b) having the angle of view ⁇ as the apex angle are the same as the horizontal width H of the right display screen 4b.
  • the right display screen 4b is disposed at a position where the optical axis 10 of the eyepiece 3b is folded back by the right mirror 5b from a position that should originally be in front of the right eyepiece 2b (the base).
  • An image displayed on the left display screen 4a (an image obtained by mirror-reversing the left image for binocular stereoscopic viewing) reaches the left mirror 5a at a predetermined incident angle with respect to the normal of the left mirror 5a and is equal to this incident angle. It reaches the eyepiece 3a at an angle of reflection and is observed by the left eye P.
  • an image displayed on the right display screen 4b (an image obtained by mirror-inverting the right image for binocular stereoscopic viewing) reaches the right mirror 5b at a predetermined incident angle with respect to the normal of the right mirror 5b, and this incident The eye reaches the eyepiece lens 3b at a reflection angle equal to the angle and is observed by the right eye P.
  • the virtual image position e will be described.
  • the virtual image position e shown in FIG. 3 must be farther than the shortest distance that the eye P can focus on. This is because the focus cannot be achieved when the virtual image position e is equal to or shorter than the shortest distance. Since this shortest distance is about 25 cm for young people, the virtual image position e is assumed to be 400 mm or more as an easy-to-see distance.
  • H the horizontal screen size (width) of each display screen (4a, 4b).
  • f / (fa) of the virtual image position e and the virtual image size H1 is a virtual image magnification ⁇ described later.
  • r the distance from each eyepiece (2a, 2b) to any point on each display screen (4a, 4b).
  • f> r In order for any point on each display screen to appear as a virtual image at a finite distance, f> r must be satisfied at all points. Since the maximum value of r is a ⁇ sec ⁇ , it must be f> a ⁇ sec ⁇ . However, under this condition, when f is approximately equal to a ⁇ sec ⁇ , the distance to the virtual image position of the end point becomes infinite, and the focus of the eye must be changed greatly between the center of each screen and the end point.
  • change of the virtual image magnification ⁇ (change of virtual image position) is 2 It is desirable to keep it below twice. That is, the virtual image magnification ⁇ when the central portion of each display screen (4a, 4b) is viewed from each eyepiece 2 (2a, 2b) on the optical axis 10 and the angle of view ⁇ is ⁇ 30 ° and each eyepiece. It is desirable that the ratio with the virtual image magnification ⁇ ′ when viewing the end of each display screen (4a, 4b) from 2 (2a, 2b) is 2 times or less.
  • the younger age group (from about 15 years old to about 34 years old) has a wide focus adjustment range of the eye P, so even if the change in the virtual image magnification ⁇ between the display screen center and the display screen edge is large, it does not matter. This is because, since the focus adjustment range of the eye P is narrow, if the magnification change between the screen center and the screen periphery, that is, the virtual image position change is large, either the display screen center or the display screen edge will appear blurred.
  • the virtual image magnification ⁇ at the optical axis 10 is , ⁇ ⁇ 4.23, that is, 4.23 times or less.
  • the conditions under which the virtual image position e is 400 mm or more are as follows.
  • each display screen (4a, 4b) having a lateral width H of 144 mm is provided at a position in contact with the extension lines g1a, g1b, g2a, g2b with a horizontal angle of view ⁇ ⁇ 30 °, each eyepiece 2 (2a, 2b) )
  • To the vicinity of the center of each display screen (4a, 4b) is 125 mm. Therefore, the virtual image magnification ⁇ at which the virtual image position e is 400 mm or more is as follows.
  • the conditions for focusing are as follows. Since the distance a is 125 mm, the virtual image magnification ⁇ is 3.2 ⁇ ⁇ ⁇ 4.23, and the coefficient k is 1.31 ⁇ k ⁇ 1.455, the lens focal length f is 164 mm ⁇ f ⁇ 182 mm. That is, when a 6.5-inch display screen of 144 mm ⁇ 81 mm is arranged at a position where the distance a is 125 mm using the eyepiece 2 (2a, 2b) having a lens focal length f of 170 mm, the horizontal image is displayed. A virtual image with a virtual image magnification ⁇ of 3.8 times can be seen where the angle ⁇ and the vertical field angle (not shown) are ⁇ 30 ° ⁇ ⁇ 18 ° and the virtual image position e is 472 mm.
  • the apertures of the eyepieces 3a and 3b are not considered.
  • the eyepiece 3a may be reflected on the left mirror 5a.
  • the eyepiece 3b when the eyepiece 3b is disposed on the line 7b connecting the eyepiece side end of the right mirror 5b and the eyepiece side end of the right display screen 4b, the eyepiece 3b There is a possibility of reflection in the right mirror 5b.
  • the distance a is set to a value larger than 125 mm and the lens focal length f is set to a large value, or the mirror angle ⁇ of each mirror (5a, 5b) is set to 45.
  • the degree of freedom of the viewpoint decreases when the lens diameter h is reduced, it is desirable to avoid the reflection of the eyepieces 3a and 3b while keeping the lens diameter h at 40 mm.
  • the conditions for focusing without reducing the lens diameter h are as follows.
  • the distance a is 135 mm
  • the virtual image magnification ⁇ is 3.0 ⁇ ⁇ ⁇ 4.23
  • the constant k is 1.31 ⁇ k ⁇ 1.5
  • the lens focal length f is 164 mm ⁇ f ⁇ 202 mm.
  • the horizontal field angle ⁇ and the vertical field angle are ⁇ 28.1 ° ⁇ ⁇ 16.7 ° and the virtual image position e is 466 mm, and the virtual image magnification ⁇ Can see a 3.45x virtual image.
  • the mirror angle ⁇ is set to 45 °, and the distance c from the intersection j1 between the optical axis 10 of the eyepiece 3a and the left mirror 5a to the intersection j2 between the optical axis 10 of the eyepiece 3b and the right mirror 5b is , 61 mm. That is, from the position (intersection j1, j2) where the distance between the left mirror 5a and the right mirror 5b is equal to the eye width b when the center of each display screen (4a, 4b) is viewed in parallel, each eyepiece 3a.
  • the distance to 3b is set to 61 mm.
  • the optical axis 10 of the eyepiece 3a reflected by the left mirror 5a is positioned in the vertical direction of the left display screen 4a at the center of the left display screen 4a, and the optical axis of the eyepiece 3b reflected by the right mirror 5b. 10 is located in the vertical direction of the right display screen 4b at the center of the right display screen 4b.
  • the boundary between subpixels is recognized as a color break.
  • an inappropriate color mixture may be seen, or a pseudo line of another color may be seen due to a break.
  • a monochromatic thin line is displayed on the CF-LCD, only the red sub-pixel is displayed, so that the red thin line appears to be interrupted.
  • the FSC-LCD used in the stereoscopic image display apparatus 100 is a method of switching RGB at high speed at 180 Hz or higher on the same pixel of the FSC-LCD and performing full color display with one pixel. Therefore, the FSC-LCD requires only one-third the number of signal wirings compared to the CF-LCD, so that high definition and a wide aperture ratio can be easily achieved and pixel boundary recognition is reduced. Therefore, in the FSC-LCD, there is no possibility of seeing discontinuities, color mixing, pseudo lines, and the like.
  • the color of the light source for example, LED
  • the color gamut can be freely adjusted without causing any trouble. Therefore, in the FSC-LCD, it is possible to obtain a glossy feeling as if a film photograph is seen due to the connectivity of each pixel.
  • the eyepieces 3a and 3b can have a large aperture, and even if the distance between the eyepieces 3a and 3b and the eye P is increased, the position of the pupil is 2 Stereoscopic viewing is possible even with a deviation of ⁇ 3 cm. In addition, brightness reduction and flicker do not occur as in the conventional liquid crystal shutter glasses method, and natural stereoscopic viewing is possible.
  • the biggest difficulty of FSC-LCD is that “color breakup” occurs. That is, when a certain display object is moving on the display screen of the FSC-LCD, the front end and the rear end appear to be rainbow colors. With regard to this color breakup, black can be added to one or more fields before and / or after the set of three primary colors, and the colors in the added set can be displayed sequentially to improve the level without any problem. is there.
  • each display screen (4a, 4b) is Full-HD definition (1920 ⁇ 1080).
  • the present invention is not limited to this, and the display screen (4a, 4b)
  • the definition may be HD definition such as 1440 ⁇ 1080 or 1280 ⁇ 720, for example. Even in such a configuration, there is no problem with the prior art that the monochromatic thin line is interrupted and the color mixture and the pseudo-line are visible at the boundary of the color plane, so that it is possible to improve the image quality.
  • the configuration example has been described in which the mirror angle ⁇ is 45 ° with respect to the optical axis 10, but the mirror angle ⁇ is not limited to 45 ° and is within the above-described conditions of the virtual image position e.
  • the mirror angle ⁇ is set to an angle other than 45 °, and each display screen (4a, 4b) is You may comprise so that it may arrange
  • the stereoscopic image display apparatus 100 uses the pair of left and right eyepieces 3a and 3b arranged so that the optical axis 10 orthogonal to the virtual image plane is parallel to the virtual image plane.
  • a first display screen (left display screen 4a) that displays a mirror-inverted left-side image for binocular stereoscopic viewing with a resolution corresponding to the HDTV system ) Having a color sequential display type first liquid crystal display device (left display device 6a) and a right-side image for binocular stereoscopic viewing that is disposed opposite to the left display screen 4a and is mirror-inverted.
  • the right eyepiece 3b and the first mirror (left side mirror 5a) arranged at a predetermined angle ⁇ with respect to the optical axis 10 of the eyepiece 3a so that the image to be captured falls within this angle of view ⁇ .
  • the overall size of the device can be reduced as compared with the conventional stereoscopic image display device, and the display screens (4a, 4b) are displayed.
  • the image can be observed with the original binocular parallax, and the eye P does not get tired or have a headache even when observed for a long time.
  • the stereoscopic image display apparatus 100 according to the present embodiment can easily achieve higher definition and a wider aperture ratio than the CF-LCD, and can reduce pixel boundary recognition. As a result, it is possible to reduce the installation space of the stereoscopic image display apparatus 100 as compared with the prior art and realize a wide color reproduction range.
  • the stereoscopic image display apparatus 100 displays the virtual image magnification ⁇ when viewing the central portion of the left display screen 4a from the left eyepiece lens 3a and the end portion of the left display screen 4a from the left eyepiece lens 3a.
  • the ratio with the virtual image magnification ⁇ ′ when viewed is configured to be 2 times or less, and the virtual image magnification ⁇ when viewing the central portion of the right display screen 4b from the right eyepiece 3b and the right eyepiece 3b.
  • the horizontal screen dimensions of the left display screen 4a and the right display screen 4b are formed to be approximately twice the eye width, so the horizontal screen dimensions are the conventional ones.
  • the horizontal screen size (about 442 mm in the case of 20 inches) of the CF-LCD used in the stereoscopic image display device can be reduced to about one third. Therefore, the depth dimension of the stereoscopic image display apparatus 100 can be greatly reduced, and the weight of the entire stereoscopic image display apparatus 100 can be reduced.
  • the stereoscopic video display apparatus 100 shown in the present embodiment shows an example of the content of the present invention, and can be combined with another known technique, and departs from the gist of the present invention. Of course, it is possible to change and configure such as omitting a part within the range.
  • the present invention is mainly applicable to a stereoscopic video display device, and is particularly useful as an invention capable of reducing the size and improving the image quality of a stereoscopic video display device.

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

Abstract

La présente invention concerne un dispositif d'affichage vidéo en trois dimensions comprenant : un dispositif d'affichage couleur gauche de type à affichage séquentiel (6a) doté d'un écran d'affichage gauche (4a) qui affiche, dans une définition correspondant au format HDTV (télévision à haute définition), une vidéo inversée en miroir du côté gauche permettant un visionnage stéréoscopique à lentilles jumelées ; un dispositif d'affichage couleur droit de type à affichage séquentiel (6b) agencé en regard de l'écran d'affichage gauche (4a) et doté d'un écran d'affichage droit (4b) qui affiche, dans ladite définition, une vidéo inversée en miroir du côté droit permettant un visionnage stéréoscopique à lentilles jumelées ; un miroir gauche (5a) ayant une taille correspondant à l'angle de champ (θ) pour un oculaire gauche (3a), et disposé à un angle prescrit (φ) par rapport à l'axe optique (10) de l'oculaire (3a), de sorte que la vidéo affichée sur l'écran d'affichage du côté gauche (4a) s'intègre dans l'angle de champ (θ) ; et un miroir droit (5b) ayant une taille correspondant à l'angle de champ (θ) pour un oculaire droit (3b), et disposé à l'angle prescrit (φ) par rapport à l'axe optique (10) de l'oculaire (3b), de sorte que la vidéo affichée sur l'écran d'affichage du côté droit (4b) s'intègre dans l'angle de champ (θ).
PCT/JP2011/074791 2011-10-27 2011-10-27 Dispositif d'affichage vidéo en trois dimensions Ceased WO2013061439A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015194707A (ja) * 2014-03-27 2015-11-05 パナソニックＩｐマネジメント株式会社 表示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004305367A (ja) * 2003-04-04 2004-11-04 Olympus Corp 立体観察装置
WO2008139828A1 (fr) * 2007-05-14 2008-11-20 Mitaka Kohki Co., Ltd. Dispositif d'affichage d'image tridimensionnelle
JP2009288296A (ja) * 2008-05-27 2009-12-10 Mitaka Koki Co Ltd 立体映像表示装置
JP2010224065A (ja) * 2009-03-19 2010-10-07 21 Aomori Sangyo Sogo Shien Center 色順次表示方式液晶表示装置およびその色表示方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004305367A (ja) * 2003-04-04 2004-11-04 Olympus Corp 立体観察装置
WO2008139828A1 (fr) * 2007-05-14 2008-11-20 Mitaka Kohki Co., Ltd. Dispositif d'affichage d'image tridimensionnelle
JP2009288296A (ja) * 2008-05-27 2009-12-10 Mitaka Koki Co Ltd 立体映像表示装置
JP2010224065A (ja) * 2009-03-19 2010-10-07 21 Aomori Sangyo Sogo Shien Center 色順次表示方式液晶表示装置およびその色表示方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015194707A (ja) * 2014-03-27 2015-11-05 パナソニックＩｐマネジメント株式会社 表示装置

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