WO2012105720A1 - Dispositif d'affichage d'images tridimensionnelles - Google Patents

Dispositif d'affichage d'images tridimensionnelles Download PDF

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Publication number
WO2012105720A1
WO2012105720A1 PCT/JP2012/052801 JP2012052801W WO2012105720A1 WO 2012105720 A1 WO2012105720 A1 WO 2012105720A1 JP 2012052801 W JP2012052801 W JP 2012052801W WO 2012105720 A1 WO2012105720 A1 WO 2012105720A1
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WIPO (PCT)
Prior art keywords
image
eye
green
red
image display
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Application number
PCT/JP2012/052801
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English (en)
Japanese (ja)
Inventor
掛谷　英紀
Original Assignee
国立大学法人筑波大学
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Application filed by 国立大学法人筑波大学 filed Critical 国立大学法人筑波大学
Publication of WO2012105720A1 publication Critical patent/WO2012105720A1/fr

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    • 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]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • 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
    • G02B30/23—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 wavelength separation, e.g. using anaglyph 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
    • H04N13/324—Colour aspects

Definitions

  • the present invention relates to a stereoscopic image display device capable of suppressing the occurrence of flicker when a three-dimensional image is displayed on an image display device with a low refresh rate compared to the case where a conventional display method is used.
  • a stereoscopic image display device using a display device such as a cathode ray tube, a liquid crystal display panel, a plasma display panel, or a digital micromirror device (DMD: Digital Micromirror Device) is used as a device capable of displaying a color stereoscopic image.
  • the video projector type stereoscopic image display device used is well known. In order to display a stereoscopic image using these display devices, images for the right eye and the left eye are displayed to the observer.
  • time-division display is often performed in order to display the pixels of the display device with high resolution without dividing the pixels of the right eye and left eye into two.
  • shutters synchronized with the above time division are provided for the right eye and the left eye.
  • the time-division display includes a frame sequential method in which left and right switching is performed for each frame and a field sequential method in which each field is switched, but the shutter switching frequency in the latter field sequential method is higher than that of the former. It will be higher except in special cases.
  • a shutter system that uses a right-eye shutter and a left-eye shutter in a time sequential display of a frame sequential system is often used.
  • This shutter is realized by, for example, electrically controlling the polarization characteristics of the liquid crystal.
  • a liquid crystal shutter that opens and closes to the left and right, and (2) the observer.
  • a polarizing filter is used, that is, polarizing glasses that transmit circularly polarized light in the opposite directions on the left and right sides are applied, and the circularly polarized state of the light emitted from the display surface is switched on the display device side.
  • the plasma display is suitable for liquid crystal shutter glasses by switching the left and right images at twice 120 Hz. Image. This is because the plasma display uses an impulse display method, and all pixels simultaneously discharge plasma for a short time and then turn off.
  • a liquid crystal display it is necessary to make it 240 times of 240 Hz. This is because the liquid crystal display rewrites the image for the left or right eye after the drawing of the image for the right or left eye is finished, and thus needs to hide the image being rewritten.
  • Anaglyph is known as a substantially monochromatic stereoscopic image display method. In this method, images of colors complementary to each other are presented to the observer, and the respective images are presented to the right eye and the left eye via filters that transmit either one of the complementary colors or the other.
  • Dolby 3D is known as an anaglyph capable of displaying a color stereoscopic image.
  • FIG. 4 shows a structural example of a liquid crystal display. This comprises a polarizing filter 1, a glass substrate 2, a transparent electrode 3, an alignment film 4, a liquid crystal 5, a spacer 6, a color filter 7, and a backlight.
  • FIG. 5 shows an example of transmission spectral characteristics of a resist used for a color filter of a color LCD panel. From this figure, it can be seen that although there is a slight overlap in the transmission characteristics, it can be spectrally separated by the color resist. It is desirable that the overlap of the transmission characteristics is as small as possible.
  • FIG. 6 shows a spectrum example of a light emitting diode (LED) light source used in a liquid crystal display.
  • FIG. 7 shows a spectrum example of a white LED element using a blue LED, a green phosphor, and a red phosphor.
  • the spectrum of the light source used in the present invention has various backlights, that is, in the case of the edge light type backlight method and the direct type backlight method, red (R), green (G), It is desirable that the boundary between blue (B) is clear. It is desirable to be clear in this way when a plasma display or a colored organic EL display is applied to the present invention.
  • the present invention is a display device having a set of display primary colors (for example, three primary colors or four primary colors), that is, a normal color display device, and a normal refresh without using a particularly high refresh rate for stereoscopic images.
  • a rate display device realizes an anaglyph type color stereoscopic image display device.
  • the stereoscopic image display device of the present invention is a stereoscopic image display device based on time-division multiplex anaglyph, which is a time-division multiplex image display means, a time-division multiplex image separation means, a first control device that controls the stereoscopic image display device, A second control device for controlling the time-division multiplexed image display means; and a synchronization means for synchronizing the first control device and the second control device.
  • the time-division multiplex image display means displays, on one display screen, a plurality of color stereoscopic images including at least one image of red, green and blue to be displayed for one of the right-eye image and the left-eye image.
  • the right-eye image and the left-eye image are displayed simultaneously so that they are complementary colors, and the left-eye image and the right-eye image are alternately displayed by time-division multiplexing.
  • the time-division multiplex image separation means includes a right-eye and a left-eye, each of which is a color filter whose transmission wavelength characteristic changes periodically, and is a feature of the stereoscopic image display device.
  • the transmission wavelength changes in synchronization with time-division multiplexing, and the transmission wavelength of the color filter for the right eye or the left eye is different from that of the color of the image displayed for the right eye or the left eye, respectively. It is characterized by being higher than the transmittance.
  • the stereoscopic image display device can be easily realized by using a liquid crystal panel for color image display on the display surface. Further, the backlight of the color image display liquid crystal panel can easily separate red, green and blue by using a set of light emitting diodes or diode lasers emitting the red, green and blue light as light sources.
  • the time-division multiplex image display means selectively transmits red, green and blue light from the light source.
  • the time-division multiplex image display means is provided with each material that selectively transmits the red, green, and blue light in a mosaic pattern, such as a liquid crystal panel that excludes a backlight from a color liquid crystal display.
  • each intensity modulation element that modulates the intensity of each light transmitted through each of the substances arranged in the mosaic pattern with each liquid crystal shutter is provided.
  • the time-division multiplexing display on the display screen has a configuration that can reduce flicker at a low refresh rate most, and the first image that displays the green image of the right-eye image, the red image, and the blue image of the left-eye image. Time division multiplexing is performed in which the period and the second period in which the red image, the blue image, and the green image of the left eye image are displayed are alternately arranged.
  • the green light transmittance of the green image of the right-eye or left-eye color filter is greater than the red light transmittance of the red image and the blue light transmittance of the blue image of the left-eye image.
  • the green light transmittance of the green image of the right-eye or left-eye color filter is higher or lower than the second period, respectively, and the red light or blue image of the red image of the left-eye image is synchronized with the second period. Lower or higher than the blue light transmittance, respectively.
  • Each time slot in the time division is further time divided (hereinafter referred to as second time division), and the color filter is divided into a plurality of regions that change according to each time slot in the second time division, and the time division multiplexed image display is performed.
  • the means is configured to be divided into a plurality of areas that perform respective displays that pass through each of the plurality of areas, and the plurality of areas change according to each time slot in the second time division,
  • the viewing angle can be increased by sequentially switching the divided area of the color filter and the divided area of the time-division multiplexed image display means according to each time slot in the second time division.
  • a time-division color anaglyph stereoscopic image displayed on a normal color liquid crystal display device is viewed through the time-division color filter glasses which is one of the features of the present invention, so that flicker can be achieved even at a normal refresh rate. Appreciate color 3D images without feeling.
  • FIG. 1 shows a block diagram of a stereoscopic image display apparatus of the present invention.
  • FIG. 2 shows an operation timing diagram of the example of FIG.
  • FIG. 3 is an operation timing chart in the case where the transmission characteristics of the liquid crystal panel 11 and the color filter 13 are synchronized, and is an example of a time chart slightly different from FIG.
  • FIG. 4 is a diagram showing the structure of the liquid crystal display 10. This is a structure that can also be used for the color filter 13.
  • FIG. 5 shows an example of the transmission spectrum of the color filter of the liquid crystal display 10.
  • FIG. 6 is a schematic diagram showing an emission spectrum of a backlight using LEDs as light sources for all three primary colors.
  • FIG. 7 is a schematic diagram showing an emission spectrum of a backlight of a white LED light source using a blue LED, a green phosphor, and a red phosphor.
  • FIG. 8 is a diagram illustrating that when there is an overlapping portion of the transmission characteristics at the RGB ends of the color filter 13, a ghost image due to light transmitted through the portion may be seen. In order to avoid this, it is desirable to use a color filter in which the overlap between BG and GR is negligible in the spectral characteristics of transmittance.
  • FIG. 1 is a block diagram of a stereoscopic image display apparatus as an example of the present invention.
  • FIG. 2 shows an example of the operation timing.
  • the stereoscopic image display apparatus of the present invention is a stereoscopic image display apparatus based on time-division multiplex anaglyph, which is time-division multiplex image display means (liquid crystal display 10), time-division multiplex image separation means (color filter glasses 12), and the stereoscopic image.
  • the synchronization circuit 18 may be wired or wireless.
  • the liquid crystal display 10 modulates light including red (R), green (G), and blue (B) of the three primary colors of light from the backlight 17 with an image displayed in color on the liquid crystal display panel 11, and the observer 14 Is observed through the left and right color filters 13.
  • the image displayed on the liquid crystal display panel 13 is the output of the first control device 16, and the liquid crystal display panel 13 constituting the color filter glasses 12 is controlled by the second control device 16.
  • the backlight used here is, for example, a well-known cold cathode fluorescent tube.
  • a light source having a spectrum shown in the schematic diagram of FIG. 6 may be used in which the three primary colors are LEDs or laser diodes. Further, the light source having a spectrum shown in the schematic diagram of FIG.
  • the liquid crystal display 10 has, for example, the structure shown in FIG.
  • the transmission spectrum of the color filter can be used even when there is a slight overlap between the red and green or green and blue spectra as shown in FIG. 5, but this overlap is preferably as small as possible.
  • the color filter glasses 12 are glasses having a structure similar to that of the liquid crystal display of FIG.
  • the transmission characteristics of the color filter 13 allow viewing of a color stereoscopic image even when the transmission characteristics of the color filter of the liquid crystal display 10 are similar to those described above.
  • the transmission characteristics at the RGB edges of the color filter 13 overlap. When there is a part, a ghost image by light transmitted through the part may be seen. In order to avoid this, as shown in FIG. 8, it is desirable to use a color filter that is small enough that the overlap between BG and GR is negligible in the spectral characteristics of transmittance.
  • a dielectric multilayer film filter is provided on the glass substrate of the color filter glasses 12 so as to block light transmission between the BG and the G-R overlapping portions. You may make it do.
  • the image displayed on the liquid crystal display 10 and the transmission characteristics of the color filter 13 are synchronized as follows. This synchronization is achieved between the first control device 16 and the second control device 15 via the synchronization circuit 18.
  • the image displayed on the liquid crystal display 10 and the transmission characteristics of the color filter 13 may be synchronized as shown in FIG. (1)
  • t1 section On the right side of the LCD panel 11, green and blue are transmitted and red is blocked.
  • red On the left, green and blue are blocked, red is transmitted,
  • t2 section On the right side of the LCD panel 11, green and blue are blocked, red is transmitted, On the left, green and blue are transmitted, red is blocked, On the right side of the color filter 13, green and blue are blocked, red is transmitted, On the left, green and blue are transmitted, red is blocked, And repeat these intervals.
  • yellow (Y) is used in addition to the above RGB.
  • a light source containing yellow (Y) is used, and the color filter and the color filter 13 of the liquid crystal display panel 11 are yellow (Y) in addition to RGB.
  • Y yellow
  • what is necessary is just to synchronize with the green thing as the timing of permeation

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Liquid Crystal (AREA)
  • Stereoscopic And Panoramic Photography (AREA)

Abstract

La présente invention concerne un dispositif d'affichage d'images tridimensionnelles réalisé sous la forme d'un anaglyphe et constituant un dispositif d'affichage présentant une fréquence de rafraichissement normale. Par rapport à l'une ou l'autre d'une image d'œil droit et d'une image d'œil gauche, un moyen d'affichage d'image à multiplexage par répartition temporelle affiche sur un écran d'affichage, par multiplexage par répartition temporelle, une pluralité d'images tridimensionnelles en couleurs contenant au moins une image R, V ou B devant être affichée. Les images d'œil droit et d'œil gauche sont des images de couleurs différentes, affichées simultanément, les images d'œil gauche et d'œil droit étant affichées en alternance par multiplexage par répartition temporelle. Des moyens de séparation d'images multiplexées par répartition temporelle sont également prévus pour l'œil droit et pour l'œil gauche, chacun d'entre deux étant un filtre coloré présentant des caractéristiques de longueur d'onde de transmission variant cycliquement. Les caractéristiques de longueur d'onde de transmission varient en synchronisme avec le dispositif d'affichage d'images et parmi les caractéristiques de longueurs d'onde de transmission du filtre coloré destiné à l'œil droit et à l'œil gauche, la transmittance de l'image affichée en correspondance avec l'œil droit ou avec l'œil gauche est plus élevée que la transmittance des autres couleurs.
PCT/JP2012/052801 2011-02-02 2012-02-01 Dispositif d'affichage d'images tridimensionnelles WO2012105720A1 (fr)

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JP2011-020650 2011-02-02
JP2011020650A JP2012159776A (ja) 2011-02-02 2011-02-02 立体画像表示装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111198489A (zh) * 2018-11-16 2020-05-26 青岛海信激光显示股份有限公司 全息显示系统及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6411025B2 (ja) * 2013-12-27 2018-10-24 国立大学法人 筑波大学 時分割型パララックスバリア式裸眼立体映像表示装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001508617A (ja) * 1997-01-22 2001-06-26 ダイナミック ディジタル デプス リサーチ プロプライエタリー リミテッド 立体画像を作る方法および装置
WO2009045451A1 (fr) * 2007-10-01 2009-04-09 Doubleshot, Inc. Affichage anaglyphe en trois dimensions en couleurs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001508617A (ja) * 1997-01-22 2001-06-26 ダイナミック ディジタル デプス リサーチ プロプライエタリー リミテッド 立体画像を作る方法および装置
WO2009045451A1 (fr) * 2007-10-01 2009-04-09 Doubleshot, Inc. Affichage anaglyphe en trois dimensions en couleurs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111198489A (zh) * 2018-11-16 2020-05-26 青岛海信激光显示股份有限公司 全息显示系统及方法

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