WO2013157167A1 - Stereoscopic display device - Google Patents

Stereoscopic display device Download PDF

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Publication number
WO2013157167A1
WO2013157167A1 PCT/JP2012/082991 JP2012082991W WO2013157167A1 WO 2013157167 A1 WO2013157167 A1 WO 2013157167A1 JP 2012082991 W JP2012082991 W JP 2012082991W WO 2013157167 A1 WO2013157167 A1 WO 2013157167A1
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Prior art keywords
image
eye image
pixel
display device
sub
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PCT/JP2012/082991
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French (fr)
Japanese (ja)
Inventor
昭憲 林
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Eizo株式会社
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Publication of WO2013157167A1 publication Critical patent/WO2013157167A1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—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 lenticular arrays
    • 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
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/305—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using lenticular lenses, e.g. arrangements of cylindrical lenses

Definitions

  • the present invention relates to a stereoscopic display device, and to a technique of a parallax division type stereoscopic display device.
  • the stereoscopic display device can display a stereoscopic image by displaying a left eye image and a right eye image.
  • Various methods for displaying the left-eye image and the right-eye image have been realized, but they are roughly classified into a space division method and a time division method.
  • a stereoscopic display device using a parallax division method which is a kind of space division method, will be described.
  • a lenticular lens or a parallax barrier is arranged on the front surface of the liquid crystal panel.
  • the left eye image and the right eye image displayed from the liquid crystal panel are imaged at the divided image forming points.
  • the viewer can see a three-dimensional image. This position of the viewer is called a normal viewing position.
  • Patent Document 1 discloses a parallax division type stereoscopic display device using a lenticular lens.
  • a peak point of illuminance is formed for each interval between the left and right eyes.
  • the image point of the left eye image and the image point of the right eye image are alternately formed.
  • This peak point will be described with reference to FIG. FIG. 13 shows that the image point RIp of the right eye image and the image point LIp of the left eye image are alternately formed on a plane parallel to the display surface of the stereoscopic display device 50.
  • the depth is reversed.
  • the image is recognized by the viewer.
  • a position where the left eye image and the right eye image are reversed and incident on the eyes of the viewer is referred to as a reverse viewing position.
  • the stereoscopic image to be displayed is a stereoscopic image that the viewer sees for the first time, there is a problem that the stereoscopic image with the reversed depth is recognized as a correct stereoscopic image without noticing that the stereoscopic image is in the reverse viewing position.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a stereoscopic display device that allows a viewer to notice that he / she is not at the normal viewing position.
  • the present invention has the following configuration. That is, the present invention provides a first display pixel that displays a left-eye image, a second display pixel that displays a right-eye image, and another image different from the left-eye image and the right-eye image.
  • a liquid crystal panel including a third display pixel to be displayed as a third display image, and formed by dividing an image formation point of each image displayed from the first display pixel, the second display pixel, and the third display pixel
  • An imaging point splitter that forms the imaging points of the left eye image, the right eye image, and the third display image in order, and the left eye image and Forming the image points of the right-eye image next to each other, and forming the image points of the third display image with the image points of the left-eye image and the right-eye image adjacent to each other.
  • the liquid crystal panel includes a first display pixel, a second display pixel, and a third display pixel.
  • An image for the left eye is displayed from the first display pixel.
  • An image for the right eye is displayed from the second display pixel.
  • From the third display pixel another image different from the left-eye image and the right-eye image is displayed as the third display image.
  • the image formation point divider divides the image formation points of each image displayed from the first display pixel, the second display pixel, and the third display pixel and sequentially forms them.
  • the image points of the left eye image and the right eye image are formed adjacent to each other.
  • the image formation point of the third display image is formed across the image formation points of the adjacent left-eye image and right-eye image.
  • the image formation point of the third display image is formed outside the image formation point of the adjacent left-eye image and right-eye image.
  • the viewer sees another image at the image formation point of the third display image that is neither the left-eye image nor the right-eye image, with the left or right eye at a position other than the normal viewing position.
  • the viewer feels uncomfortable with the displayed image.
  • the viewer cannot see the stereoscopic image, he / she notices that the viewer is not in the normal viewing position. In this way, the viewer can be made aware that he is not in the normal viewing position. Further, since the viewer does not see the image for the right eye with the left eye and the image for the left eye with the right eye, reverse vision can be prevented.
  • the imaging point divider is a lenticular lens disposed in front of the liquid crystal panel. If the imaging point divider is a lenticular lens disposed on the front surface of the liquid crystal panel, the images displayed from the first display pixel and the second display pixel are enlarged, thereby reducing a drop in luminance due to the pixel interval. Can do.
  • the liquid crystal panel may include a display pixel having the first display pixel, the second display pixel, and the third display pixel as sub-pixels. By having the first display pixel, the second display pixel, and the third display pixel as sub-pixels, resolution reduction can be prevented.
  • the lens width of the lenticular lens is preferably longer than twice the width of the sub-pixel and shorter than 3 times. Since the lens width is longer than twice the width of the sub-pixel and shorter than three times, the sub-pixels that are the first display pixel and the second display pixel can be suitably covered with the lens.
  • the third display image is preferably a black image. If the black image is displayed as the third display image, nothing is displayed at the imaging point of the third display pixel. As a result, when the viewer is not in the normal viewing position, only a dark planar image can be seen, so that it can be noticed that the viewer is not in the normal viewing position. *
  • the third display image is preferably a white image. If the white image is displayed as the third display image, a bright white image is displayed at the image point of the third display pixel. As a result, when the viewer is not at the normal viewing position, he / she can see that he / she is not at the normal viewing position because he / she sees a bright planar image.
  • the present invention it is possible to provide a stereoscopic display device that allows a viewer to notice that the user is not in the normal viewing position.
  • FIG. 1 is a block diagram illustrating a schematic configuration of a stereoscopic display device according to Embodiment 1.
  • FIG. 2 is a perspective view illustrating a pixel and a lenticular lens according to Example 1.
  • FIG. 2 is a cross-sectional view illustrating a pixel and a lenticular lens according to Example 1.
  • FIG. 6 is an explanatory diagram showing the progress of light emitted from a pixel according to Example 1.
  • FIG. 6 is an explanatory diagram illustrating a positional relationship between a stereoscopic display device according to Example 1 and a viewer. It is explanatory drawing which shows the normal viewing position and missighting position which concern on Example 1.
  • FIG. 1 is a block diagram illustrating a schematic configuration of a stereoscopic display device according to Embodiment 1.
  • FIG. 2 is a perspective view illustrating a pixel and a lenticular lens according to Example 1.
  • FIG. 2 is a cross-sectional view illustrating a pixel
  • FIG. 6 is an illuminance distribution diagram of the stereoscopic display device according to Embodiment 1.
  • FIG. FIG. 3 is a luminance distribution diagram when pixels are turned on according to the first embodiment.
  • 6 is a block diagram illustrating a schematic configuration of a stereoscopic display device according to Embodiment 2.
  • FIG. 6 is a perspective view illustrating a pixel and a lenticular lens according to Example 2.
  • FIG. FIG. 6 is an explanatory diagram showing the progress of light emitted from a pixel according to Example 2. It is explanatory drawing which shows advancing of the light radiate
  • FIG. 1 is a block diagram illustrating a schematic configuration of a stereoscopic display device according to the first embodiment.
  • FIG. 2 is a perspective view illustrating pixels and a lenticular lens according to the first embodiment.
  • the display surface side of the liquid crystal panel is the front, and the opposite side is the rear.
  • a stereoscopic display device 1 includes a liquid crystal panel 2 that displays a left-eye image and a right-eye image, a backlight 3 that emits light from behind the liquid crystal panel 2, and a backlight.
  • a backlight drive unit 4 that drives and controls the light 3
  • a video signal processing unit 5 that performs signal processing on a stereoscopic video signal input to the stereoscopic display device 1, and a liquid crystal panel 2 based on the processed stereoscopic video signal
  • a memory 9 in which data is stored.
  • the liquid crystal panel 2 adopts an active matrix type using thin film transistors (TFTs) in this embodiment.
  • TFTs thin film transistors
  • a plurality of pixels 6 are arranged in a two-dimensional matrix on the liquid crystal panel 2.
  • Each pixel 6 has three sub-pixels 10 to 12.
  • Each of the subpixels 10 to 12 is individually driven.
  • a glass sheet 13 for protecting the liquid crystal is disposed on the front surface of the pixel 6.
  • An imaging point divider 8 is disposed on the front surface of the glass sheet 13.
  • the liquid crystal panel 2 is a monochrome display panel including no color filter or a monochrome display panel including a single color filter.
  • the backlight 3 is disposed behind the liquid crystal panel 2.
  • a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) is adopted.
  • the light emitted from the backlight 3 passes through the liquid crystal panel 2.
  • the backlight drive unit 4 controls the light amount of the backlight 3 to make the stereoscopic image displayed from the liquid crystal panel 2 have appropriate brightness.
  • the video signal processing unit 5 performs standard conversion, scaling and color correction of the input stereoscopic video signal.
  • the input stereoscopic video signal for one frame includes a left eye image and a right eye image.
  • the memory 9 stores a third image different from the left eye image and the right eye image included in the stereoscopic video signal.
  • the video signal processing unit 5 reads out the third image stored in the memory 9 and outputs it to the liquid crystal driving unit 7 together with the left-eye image and the right-eye image subjected to signal processing.
  • the video signal processing unit 5 is composed of a microprocessor.
  • the liquid crystal driving unit 7 drives the liquid crystal provided in each pixel 6 of the liquid crystal panel 2 in accordance with input image data.
  • the liquid crystal driving unit 7 includes a sub-pixel driving unit 14 that controls a voltage applied to the liquid crystal of each of the sub-pixels 10 to 12. That is, the voltage applied to the liquid crystal of each of the sub-pixels 10 to 12 is individually controlled according to the left eye image, the right eye image, and the third image sent from the video signal processing unit 5. Since the light transmission amount is controlled in each of the sub-pixels 10 to 12, the left eye image, the right eye image, and the third image are displayed for each pixel 6.
  • FIG. 3 is a cross-sectional view showing a pixel and a lenticular lens
  • FIG. 4 is an explanatory view showing the progress of light emitted from the pixel.
  • a lenticular lens 15 is employed as the imaging point divider 8.
  • the lenticular lens 15 includes a sheet portion 16 and a lens 17 serving as a base material.
  • the convex portion 17a of the lens 17 is disposed on the pixel 6 side.
  • the lens 17 is a cylindrical lens that extends in the vertical direction of the liquid crystal panel 2, and is sequentially arranged in the horizontal direction of the liquid crystal panel 2.
  • the sub pixel 10 displays a right eye image
  • the sub pixel 12 displays a left eye image
  • the sub pixel 11 disposed between the sub pixel 10 and the sub pixel 12 displays a third image.
  • the third image a white image or a black image is displayed in the first embodiment, but an image other than the white image or the black image may be used as long as the image is different from the right eye image and the left eye image.
  • Both ends of the lens 17 are disposed on the sub-pixel 11 that displays the third image. That is, the lens 17 is disposed so as to straddle the sub-pixels 10 and 12 disposed between the sub-pixel 11 and the sub-pixel 11 disposed next thereto.
  • the lens pitch Pt1 of the lens 17 is the same as the pixel pitch Pt2 of the pixel 6.
  • the lens pitch Pt1 may be smaller than the pixel pitch Pt2. More preferably, the lens pitch Pt1 is not less than 2 times and not more than 3 times the subpixel pitch Pt3 of the subpixels 10 to 12.
  • the light LgR that has passed through the sub-pixel 10 is refracted in the process of passing through each lens 17 and is focused on the right-eye image imaging point RIp.
  • the light LgL that has passed through the sub-pixel 12 is refracted in the process of passing through each lens 17 and is focused on the left-eye image image formation point LIp.
  • the light LgT that has passed through the sub-pixels 11 is refracted in the process of passing through each lens 17 and is condensed on the third image image formation point TIp.
  • FIG. 5 is an explanatory diagram showing a positional relationship between the stereoscopic display device 1 and a viewer.
  • the optical system is such that the right and left eyes of the viewer are positioned at a distance De around the center of the liquid crystal panel 2 on a plane that is a distance DI from the lenticular lens 15 of the stereoscopic display device 1.
  • the distance DI is 500 mm to 600 mm
  • the interval De is 64 mm.
  • the left eye image formation point LIp and the right eye image formation point RIp are alternately formed in order on a plane parallel to the liquid crystal panel 2 (see FIG. 6).
  • the third image image formation point TIp is formed across the adjacent left eye image image formation point LIp and right eye image image formation point RIp.
  • the distance between the image forming points is preferably the binocular distance De of the viewer. If the viewer is positioned at the normal viewing position where the left eye of the viewer is positioned at the left eye image image formation point LIp and the right eye of the viewer is positioned at the right eye image image formation point RIp, the viewer is Can be accurately visualized.
  • the viewer's right eye is arranged at a position other than the normal viewing position, that is, the left eye image forming point LIp, and the viewer's left eye is arranged at the third image forming point TIp.
  • a stereoscopic image is recognized when the viewer's left eye is placed at the position or the right eye image imaging point RIp and the viewer's right eye is placed at the third image imaging point TIp. Instead, a planar image is recognized. In this way, the viewer can notice that he is not in the normal viewing position.
  • the third image is a white image
  • the white image is recognized at the third image image formation point TIp, and the viewer feels that the planar image recognized by both eyes is abnormally bright.
  • the viewer can easily notice that he / she is not in the normal viewing position.
  • the viewer can return to the normal viewing position by moving more to the center side with respect to the liquid crystal panel 2, and can correctly see the stereoscopic image.
  • the position other than the normal viewing position as described above is hereinafter referred to as an “erroneous viewing position”.
  • FIG. 7 is a diagram simulating the illuminance distribution seen by the viewer when a black image is adopted as the third image.
  • the left-eye image image formation point LIp and the right-eye image image formation point RIp are disposed at positions 32 mm from the center of the liquid crystal panel 2 respectively. That is, the left eye image image formation points LIp and the right eye image image formation points RIp are arranged at intervals of 64 mm in the horizontal direction with the center of the liquid crystal panel 2 as the center. Since black display is employed as the third image, black display is performed in which no image is formed at the third image image formation point TIp. In this case, the distance from the left eye image image formation point LIp at the normal viewing position to the right eye image image formation point RIp at the next normal viewing position is long and exceeds the distance between both eyes of the viewer. That is, a reverse viewing position in which the viewer sees the left-eye image and the right-eye image reversed is not formed. In this way, it is possible to prevent a viewer from seeing a stereoscopic image whose depth is reversed.
  • FIG. 8 is a luminance distribution diagram when the sub-pixels in the four pixels 6 located in the center of the liquid crystal panel 2 are lit at intervals of two sub-pixels.
  • the width of the luminance drop between the two sub-pixels is smaller than the width of the light emitted from each sub-pixel. That is, the left-eye image and the right-eye image are displayed only from one of the three sub-pixels 10 to 12 in each pixel 6, but the width of the three sub-pixels by the lens 17 is displayed. It is expanded to.
  • the light emitted from the pixel that displays the left eye image, the pixel that displays the right eye image, and the pixel that displays the third image is transmitted to each pixel using the lenticular lens 15.
  • the image formation points are formed by sequentially dividing the image. That is, the left eye image image formation point LIp at the normal vision position and the right eye image image formation point RIp at the next normal vision position, or the right eye image image formation point RIp at the normal vision position and the left eye image image formation point at the next normal vision position.
  • a third image imaging point TIp is formed between the LIp and the LIp. In other words, the third image image formation point TIp is formed with the left eye image image formation point LIp and the right eye image image formation point RIp formed adjacent to each other.
  • FIG. 9 is a block diagram illustrating a schematic configuration of the stereoscopic display device according to the second embodiment
  • FIG. 10 is a perspective view illustrating the pixels and the lenticular lens according to the second embodiment
  • FIG. 11 illustrates the pixels and the lenticular lens. It is sectional drawing. 9 to 11, the portions denoted by the same reference numerals as those shown in the first embodiment have the same configuration as that of the first embodiment, and thus the description thereof is omitted here.
  • the configuration of the stereoscopic display device 1 ′ other than those described below is the same as that of the first embodiment.
  • the left eye image, the right eye image, and the third image are displayed in units of sub-pixels.
  • the left eye image, the right eye image, and the third image are displayed in units of pixels. To do. That is, the width of the lens 17 'of the lenticular lens 15' is arranged so as to cover three pixels.
  • a feature of the second embodiment is that a left eye image, a right eye image, and a third image are displayed in units of 6 pixels.
  • Each pixel 6 includes three sub-pixels 10 'to 12' as in the first embodiment.
  • R, G, and B color filters are provided in front of the sub-pixels 10 'to 12'. Accordingly, the stereoscopic display device 1 ′ according to the second embodiment can display a color stereoscopic image.
  • the liquid crystal driving unit 20 in the second embodiment includes a video signal allocation unit 21 and a sub-pixel driving unit 22 in addition to the function of the liquid crystal driving unit 7 in the first embodiment.
  • the video signal assigning unit 21 assigns to which pixel 6 the left eye image signal, the right eye image signal, and the third image signal are sent.
  • the sub-pixel driver 22 controls the voltage applied to the liquid crystals of the sub-pixels 10 'to 12' based on the R, G, and B values of the image signal assigned to each pixel.
  • the lens 17 ′ of the lenticular lens 15 ′ in Example 2 has a width corresponding to three pixels 6. Both ends of the lens 17 ′ are disposed on the pixel 6 that displays the third image. That is, the lens 17 ′ is disposed so as to straddle the pixel 6 that displays the left-eye image and the pixel 6 that displays the right-eye image disposed adjacent thereto.
  • the lens pitch Pt1 'of the lens 17' is three times the pixel pitch Pt2 of the pixel 6.
  • the lens pitch Pt1 ' may be smaller than three times the pixel pitch Pt2. More preferably, the lens pitch Pt1 'is not less than 2 times and not more than 3 times the pixel pitch Pt2.
  • the stereoscopic display device 1 ′ of the second embodiment although the resolution is lower than that of the first embodiment, a three-dimensional display can be performed in color.
  • the stereoscopic image cannot be seen, so that the viewer can be aware that the viewer is not in the normal viewing position.
  • the reverse viewing position is not formed, it is possible to prevent the viewer from looking back on the stereoscopic image.
  • the present invention is not limited to the above embodiment, and can be modified as follows.
  • the lenticular lens 15 is used as the imaging point divider 8, but the present invention is not limited to this, and a parallax barrier may be used.
  • FIG. 12 shows the progress of light emitted from the pixel 6 when the parallax barrier 31 is used as the imaging point divider 8. Even using the parallax barrier 31, the left-eye image image formation point LIp, the right-eye image image formation point RIp, and the third image image formation point TIp can be formed in order. Thereby, when the viewer is not in the normal viewing position, this can be noticed by the viewer.

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

[Problem] To provide a stereoscopic display device for making an observer aware that the observer is not in the straight-ahead viewing position. [Solution] A stereoscopic display device provided with: a liquid crystal panel provided with sub-pixels (12) for displaying a left-eye image, sub-pixels (10) for displaying a right-eye image, and sub-pixels (11) for displaying a third image different from the left-eye image and the right-eye image; and a lenticular lens (15) for forming separate imaging points for the images displayed from the sub-pixels (12), the sub-pixels (10), and the sub-pixels (11); the lenticular lens (15) forming imaging points for the left-eye image, the right-eye image, and the third image in sequence, forming the imaging points for the left-eye image and the right-eye image so as to be adjacent to each other, and forming the imaging point for the third image so as to be between the imaging points of the mutually adjacent left-eye image and right-eye image.

Description

立体表示装置3D display device
　本発明は、立体表示装置に係り、視差分割方式の立体表示装置の技術に関する。 The present invention relates to a stereoscopic display device, and to a technique of a parallax division type stereoscopic display device.
　立体表示装置は、左眼画像と右眼画像とを表示することで、立体像を表示することができる。この左眼画像および右眼画像の表示方法に関しては、種々の方法が実現されているが、空間分割方式と時分割方式とに大別される。ここでは、空間分割方式の一種である視差分割方式の立体表示装置について説明する。 The stereoscopic display device can display a stereoscopic image by displaying a left eye image and a right eye image. Various methods for displaying the left-eye image and the right-eye image have been realized, but they are roughly classified into a space division method and a time division method. Here, a stereoscopic display device using a parallax division method, which is a kind of space division method, will be described.
　視差分割方式の立体表示装置には、液晶パネルの前面に、レンチキュラレンズまたはパララックスバリアが配置されている。これにより、液晶パネルから表示される左眼画像および右眼画像は、それぞれ分割された結像点で結像される。左眼画像の結像点に視覚者の左眼が、右眼画像の結像点に視覚者の右眼が位置すると、視覚者は立体像を見ることができる。この視覚者の位置を正視位置という。たとえば、特許文献１には、レンチキュラレンズを用いた視差分割方式の立体表示装置が開示されている。 In the parallax division type stereoscopic display device, a lenticular lens or a parallax barrier is arranged on the front surface of the liquid crystal panel. Thereby, the left eye image and the right eye image displayed from the liquid crystal panel are imaged at the divided image forming points. When the left eye of the viewer is positioned at the image point of the left eye image and the right eye of the viewer is positioned at the image point of the right eye image, the viewer can see a three-dimensional image. This position of the viewer is called a normal viewing position. For example, Patent Document 1 discloses a parallax division type stereoscopic display device using a lenticular lens.
特許４４００１７２号公報Japanese Patent No. 4400172
　特許文献１に記載の立体表示装置では、特許文献１の図７に示されているように、左右両眼の間隔ごとに、照度のピーク点が形成されている。この照度のピーク点において、左眼画像の結像点と右眼画像の結像点とがそれぞれ交互に形成される。このピーク点について、図１３を参照して説明する。図１３は、右眼画像の結像点ＲＩｐと左眼画像の結像点ＬＩｐとが、立体表示装置５０の表示面と平行な面上にそれぞれ交互に形成されることを示している。 In the stereoscopic display device described in Patent Document 1, as shown in FIG. 7 of Patent Document 1, a peak point of illuminance is formed for each interval between the left and right eyes. At the illuminance peak point, the image point of the left eye image and the image point of the right eye image are alternately formed. This peak point will be described with reference to FIG. FIG. 13 shows that the image point RIp of the right eye image and the image point LIp of the left eye image are alternately formed on a plane parallel to the display surface of the stereoscopic display device 50.
　このように結像点が形成されると、右眼画像の結像点に視覚者の左眼が、左眼画像の結像点に視覚者の右眼が位置した場合、奥行きが逆転した立体像が視覚者に認識される。この左眼画像と右眼画像が逆転して視覚者の眼に入射する位置を逆視位置という。表示される立体像が、視覚者にとって初めて見る立体像の場合、逆視位置にいることに気付かずに、奥行きが逆転した立体像を正しい立体像と認識してしまう問題がある。 When the imaging point is formed in this way, when the viewer's left eye is positioned at the imaging point of the right eye image and the viewer's right eye is positioned at the imaging point of the left eye image, the depth is reversed. The image is recognized by the viewer. A position where the left eye image and the right eye image are reversed and incident on the eyes of the viewer is referred to as a reverse viewing position. When the stereoscopic image to be displayed is a stereoscopic image that the viewer sees for the first time, there is a problem that the stereoscopic image with the reversed depth is recognized as a correct stereoscopic image without noticing that the stereoscopic image is in the reverse viewing position.
　本発明は、このような事情に鑑みてなされたものであって、正視位置にいないことを視覚者に気付かせる立体表示装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a stereoscopic display device that allows a viewer to notice that he / she is not at the normal viewing position.
　本発明は、このような目的を達成するために、次のような構成をとる。
　すなわち、本発明は、左眼用画像を表示する第１表示画素と、右眼用画像を表示する第２表示画素と、前記左眼用画像および前記右眼用画像とは異なる別の画像を第３表示画像として表示する第３表示画素とを備える液晶パネルと、前記第１表示画素、前記第２表示画素および前記第３表示画素から表示される各画像の結像点を分割して形成する結像点分割器とを備え、前記結像点分割器は、前記左眼用画像、前記右眼用画像および前記第３表示画像の結像点を順に形成し、前記左眼用画像および前記右眼用画像の結像点を隣り合わせて形成し、前記第３表示画像の結像点を、隣り合う前記左眼用画像および前記右眼用画像の結像点を挟んで形成することを特徴とする立体表示装置である。 In order to achieve such an object, the present invention has the following configuration.
That is, the present invention provides a first display pixel that displays a left-eye image, a second display pixel that displays a right-eye image, and another image different from the left-eye image and the right-eye image. A liquid crystal panel including a third display pixel to be displayed as a third display image, and formed by dividing an image formation point of each image displayed from the first display pixel, the second display pixel, and the third display pixel An imaging point splitter that forms the imaging points of the left eye image, the right eye image, and the third display image in order, and the left eye image and Forming the image points of the right-eye image next to each other, and forming the image points of the third display image with the image points of the left-eye image and the right-eye image adjacent to each other. This is a featured stereoscopic display device.
　液晶パネルは第１表示画素、第２表示画素および第３表示画素を備える。第１表示画素から左眼用画像が表示される。第２表示画素から右眼用画像が表示される。第３表示画素からは、左眼用画像および右眼用画像とは異なる別の画像が第３表示画像として表示される。結像点分割器は、第１表示画素、第２表示画素および第３表示画素から表示される各画像の結像点を分割して順に形成する。左眼用画像および右眼用画像の結像点は、隣り合って形成される。第３表示画像の結像点は、隣り合う左眼用画像および右眼用画像の結像点を挟んで形成される。すなわち、隣り合う左眼用画像および右眼用画像の結像点の外側に第３表示画像の結像点が形成される。これにより、視覚者は、正視位置ではない位置においては、左右いずれかの眼で、左眼用画像でもなく右眼用画像でもない第３表示画像の結像点における別の画像を見る。 The liquid crystal panel includes a first display pixel, a second display pixel, and a third display pixel. An image for the left eye is displayed from the first display pixel. An image for the right eye is displayed from the second display pixel. From the third display pixel, another image different from the left-eye image and the right-eye image is displayed as the third display image. The image formation point divider divides the image formation points of each image displayed from the first display pixel, the second display pixel, and the third display pixel and sequentially forms them. The image points of the left eye image and the right eye image are formed adjacent to each other. The image formation point of the third display image is formed across the image formation points of the adjacent left-eye image and right-eye image. That is, the image formation point of the third display image is formed outside the image formation point of the adjacent left-eye image and right-eye image. As a result, the viewer sees another image at the image formation point of the third display image that is neither the left-eye image nor the right-eye image, with the left or right eye at a position other than the normal viewing position.
　このように、正視位置にいなければ、左眼と右眼とで見る画像が異なるので、視覚者は、表示されている画像に違和感を覚える。また、視覚者は立体像を見ることができないことからも、正視位置にいないことに気付く。このようにして、視覚者に正視位置にいないことを気付かせることができる。また、視覚者は、左眼で右眼用画像を、右眼で左眼用画像を見ることがないので、逆視を防止することができる。 Thus, since the images seen by the left eye and the right eye are different when not in the normal viewing position, the viewer feels uncomfortable with the displayed image. In addition, since the viewer cannot see the stereoscopic image, he / she notices that the viewer is not in the normal viewing position. In this way, the viewer can be made aware that he is not in the normal viewing position. Further, since the viewer does not see the image for the right eye with the left eye and the image for the left eye with the right eye, reverse vision can be prevented.
　また、前記結像点分割器は、前記液晶パネルの前面に配置されるレンチキュラレンズであることが好ましい。結像点分割器が液晶パネルの前面に配置されるレンチキュラレンズであれば、第１表示画素および第２表示画素からそれぞれ表示する画像が拡大されるので、画素間隔による輝度の落ち込みを低減することができる。 Further, it is preferable that the imaging point divider is a lenticular lens disposed in front of the liquid crystal panel. If the imaging point divider is a lenticular lens disposed on the front surface of the liquid crystal panel, the images displayed from the first display pixel and the second display pixel are enlarged, thereby reducing a drop in luminance due to the pixel interval. Can do.
　また、前記液晶パネルは、前記第１表示画素、前記第２表示画素、および前記第３表示画素をサブ画素として有する表示画素を備えてもよい。第１表示画素、第２表示画素および第３表示画素をサブ画素として有することで、解像度の低減を防止することができる。 The liquid crystal panel may include a display pixel having the first display pixel, the second display pixel, and the third display pixel as sub-pixels. By having the first display pixel, the second display pixel, and the third display pixel as sub-pixels, resolution reduction can be prevented.
　また、前記レンチキュラレンズのレンズ幅は、前記サブ画素の幅の２倍よりも長く、３倍よりも短いことが好ましい。レンズ幅がサブ画素の幅の２倍よりも長く、３倍よりも短いので、第１表示画素および第２表示画素であるサブ画素を好適にレンズで覆うことができる。 The lens width of the lenticular lens is preferably longer than twice the width of the sub-pixel and shorter than 3 times. Since the lens width is longer than twice the width of the sub-pixel and shorter than three times, the sub-pixels that are the first display pixel and the second display pixel can be suitably covered with the lens.
　また、前記第３表示画像は、黒画像であることが好ましい。黒画像が第３表示画像として表示されれば、第３表示画素の結像点には何も表示されない。これにより、視覚者が正視位置にいない場合、暗い平面画像しか見えないので、自ら正視位置にいないことに気付くことができる。　 The third display image is preferably a black image. If the black image is displayed as the third display image, nothing is displayed at the imaging point of the third display pixel. As a result, when the viewer is not in the normal viewing position, only a dark planar image can be seen, so that it can be noticed that the viewer is not in the normal viewing position. *
　また、前記第３表示画像は、白画像であることが好ましい。白画像が第３表示画像として表示されれば、第３表示画素の結像点に明るい白画像が表示される。これにより、視覚者が正視位置にいない場合、明るい平面画像を見るので、自ら正視位置にいないことに気付くことができる。 The third display image is preferably a white image. If the white image is displayed as the third display image, a bright white image is displayed at the image point of the third display pixel. As a result, when the viewer is not at the normal viewing position, he / she can see that he / she is not at the normal viewing position because he / she sees a bright planar image.
　本発明によれば、正視位置にいないことを視覚者に気付かせる立体表示装置を提供することができる。 According to the present invention, it is possible to provide a stereoscopic display device that allows a viewer to notice that the user is not in the normal viewing position.
実施例１に係る立体表示装置の概略構成を示すブロック図である。1 is a block diagram illustrating a schematic configuration of a stereoscopic display device according to Embodiment 1. FIG. 実施例１に係る画素とレンチキュラレンズとを示す斜視図である。2 is a perspective view illustrating a pixel and a lenticular lens according to Example 1. FIG. 実施例１に係る画素とレンチキュラレンズとを示す断面図である。2 is a cross-sectional view illustrating a pixel and a lenticular lens according to Example 1. FIG. 実施例１に係る画素から出射した光の進行を示す説明図である。FIG. 6 is an explanatory diagram showing the progress of light emitted from a pixel according to Example 1. 実施例１に係る立体表示装置と視覚者の位置関係を示す説明図である。FIG. 6 is an explanatory diagram illustrating a positional relationship between a stereoscopic display device according to Example 1 and a viewer. 実施例１に係る正視位置と誤視位置とを示す説明図である。It is explanatory drawing which shows the normal viewing position and missighting position which concern on Example 1. FIG. 実施例１に係る立体表示装置の照度分布図である。6 is an illuminance distribution diagram of the stereoscopic display device according to Embodiment 1. FIG. 実施例１に係る画素点灯時の輝度分布図である。FIG. 3 is a luminance distribution diagram when pixels are turned on according to the first embodiment. 実施例２に係る立体表示装置の概略構成を示すブロック図である。6 is a block diagram illustrating a schematic configuration of a stereoscopic display device according to Embodiment 2. FIG. 実施例２に係る画素とレンチキュラレンズとを示す斜視図である。6 is a perspective view illustrating a pixel and a lenticular lens according to Example 2. FIG. 実施例２に係る画素から出射した光の進行を示す説明図である。FIG. 6 is an explanatory diagram showing the progress of light emitted from a pixel according to Example 2. 変形例に係る画素から出射した光の進行を示す説明図である。It is explanatory drawing which shows advancing of the light radiate | emitted from the pixel which concerns on a modification. 従来例に係る正視位置と逆視位置とを示す説明図である。It is explanatory drawing which shows the normal vision position and reverse vision position which concern on a prior art example.
　以下、図面を参照して本発明の実施例１を説明する。図１は実施例１における立体表示装置の概略構成を示すブロック図であり、図２は実施例１における画素とレンチキュラレンズとを示す斜視図である。なお、本明細書において、液晶パネルの表示面側を前方、その反対側を後方とする。 Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram illustrating a schematic configuration of a stereoscopic display device according to the first embodiment. FIG. 2 is a perspective view illustrating pixels and a lenticular lens according to the first embodiment. In this specification, the display surface side of the liquid crystal panel is the front, and the opposite side is the rear.
　１．立体表示装置の概略構成
　図１に示すように、立体表示装置１は、左眼画像および右眼画像を表示する液晶パネル２と、液晶パネル２の後方から光を照射するバックライト３と、バックライト３を駆動制御するバックライト駆動部４と、立体表示装置１に入力される立体映像信号に対して信号処理をする映像信号処理部５と、処理された立体映像信号に基づいて液晶パネル２の画素６に配置された液晶を駆動する液晶駆動部７と、画素６を透過した光の結像点を分割して形成する結像点分割器８と、入力される立体映像信号と異なる画像データが保管されているメモリ９とを備える。 1. Schematic Configuration of Stereoscopic Display Device As shown in FIG. 1, a stereoscopic display device 1 includes a liquid crystal panel 2 that displays a left-eye image and a right-eye image, a backlight 3 that emits light from behind the liquid crystal panel 2, and a backlight. A backlight drive unit 4 that drives and controls the light 3, a video signal processing unit 5 that performs signal processing on a stereoscopic video signal input to the stereoscopic display device 1, and a liquid crystal panel 2 based on the processed stereoscopic video signal A liquid crystal driving unit 7 for driving the liquid crystal disposed in the pixel 6, an image forming point divider 8 formed by dividing an image forming point of light transmitted through the pixel 6, and an image different from the input stereoscopic video signal And a memory 9 in which data is stored.
　液晶パネル２は、本実施例においては、薄膜トランジスタ（ＴＦＴ）を用いたアクティブマトリックス型を採用している。液晶パネル２には、画素６が２次元マトリックス状に複数個配置されている。各画素６は３個のサブ画素１０～１２を有する。各サブ画素１０～１２はそれぞれ個別に駆動される。画素６の前面には、液晶を保護するためのガラスシート１３が配置されている。ガラスシート１３の前面に、結像点分割器８が配置される。実施例１において、液晶パネル２は、カラーフィルタを備えないモノクロ表示のパネル、あるいは、単色のカラーフィルタを備えるモノクロ表示のパネルである。 The liquid crystal panel 2 adopts an active matrix type using thin film transistors (TFTs) in this embodiment. A plurality of pixels 6 are arranged in a two-dimensional matrix on the liquid crystal panel 2. Each pixel 6 has three sub-pixels 10 to 12. Each of the subpixels 10 to 12 is individually driven. A glass sheet 13 for protecting the liquid crystal is disposed on the front surface of the pixel 6. An imaging point divider 8 is disposed on the front surface of the glass sheet 13. In the first embodiment, the liquid crystal panel 2 is a monochrome display panel including no color filter or a monochrome display panel including a single color filter.
　バックライト３は、液晶パネル２の後方に配置されている。バックライト３として、冷陰極管（ＣＣＦＬ）または発光ダイオード（ＬＥＤ）を採用する。バックライト３から照射された光が液晶パネル２を透過する。バックライト駆動部４は、バックライト３の光量を制御することで、液晶パネル２から表示される立体像を適切な明るさにする。 The backlight 3 is disposed behind the liquid crystal panel 2. As the backlight 3, a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) is adopted. The light emitted from the backlight 3 passes through the liquid crystal panel 2. The backlight drive unit 4 controls the light amount of the backlight 3 to make the stereoscopic image displayed from the liquid crystal panel 2 have appropriate brightness.
　映像信号処理部５は、入力される立体映像信号の規格変換や、スケーリングおよび色補正を実施する。入力される１フレーム分の立体映像信号には、左眼画像と右眼画像とが含まれる。また、メモリ９には、立体映像信号に含まれる左眼画像および右眼画像とは異なる第３の画像が保管されている。映像信号処理部５は、メモリ９に保管されている第３の画像を読み出して、信号処理された左眼画像および右眼画像とともに液晶駆動部７へ出力する。映像信号処理部５は、マイクロプロセッサで構成される。 The video signal processing unit 5 performs standard conversion, scaling and color correction of the input stereoscopic video signal. The input stereoscopic video signal for one frame includes a left eye image and a right eye image. The memory 9 stores a third image different from the left eye image and the right eye image included in the stereoscopic video signal. The video signal processing unit 5 reads out the third image stored in the memory 9 and outputs it to the liquid crystal driving unit 7 together with the left-eye image and the right-eye image subjected to signal processing. The video signal processing unit 5 is composed of a microprocessor.
　液晶駆動部７は、入力される画像データに応じて液晶パネル２の各画素６に備わる液晶を駆動する。液晶駆動部７は、各サブ画素１０～１２の液晶に印加する電圧を制御するサブ画素駆動部１４を備える。すなわち、映像信号処理部５から送られる左眼画像、右眼画像および第３の画像に応じて、各サブ画素１０～１２の液晶に印加する電圧が個別に制御される。各サブ画素１０～１２において光の透過量が制御されるので、画素６ごとに左眼画像、右眼画像および第３の画像が表示される。 The liquid crystal driving unit 7 drives the liquid crystal provided in each pixel 6 of the liquid crystal panel 2 in accordance with input image data. The liquid crystal driving unit 7 includes a sub-pixel driving unit 14 that controls a voltage applied to the liquid crystal of each of the sub-pixels 10 to 12. That is, the voltage applied to the liquid crystal of each of the sub-pixels 10 to 12 is individually controlled according to the left eye image, the right eye image, and the third image sent from the video signal processing unit 5. Since the light transmission amount is controlled in each of the sub-pixels 10 to 12, the left eye image, the right eye image, and the third image are displayed for each pixel 6.
　２．結像点分割器
　次に、図２～図４を参照して、結像点分割器の説明をする。図３は画素とレンチキュラレンズとを示す断面図であり、図４は画素から出射した光の進行を示す説明図である。実施例１では、結像点分割器８としてレンチキュラレンズ１５を採用する。レンチキュラレンズ１５は、基材となるシート部１６とレンズ１７とを有する。レンズ１７の凸部１７ａは画素６側に配置されている。レンズ１７は、液晶パネル２の縦方向に伸びるシリンドリカルレンズであり、液晶パネル２の横方向に順に配置されている。 2. Imaging Point Divider Next, the imaging point divider will be described with reference to FIGS. FIG. 3 is a cross-sectional view showing a pixel and a lenticular lens, and FIG. 4 is an explanatory view showing the progress of light emitted from the pixel. In the first embodiment, a lenticular lens 15 is employed as the imaging point divider 8. The lenticular lens 15 includes a sheet portion 16 and a lens 17 serving as a base material. The convex portion 17a of the lens 17 is disposed on the pixel 6 side. The lens 17 is a cylindrical lens that extends in the vertical direction of the liquid crystal panel 2, and is sequentially arranged in the horizontal direction of the liquid crystal panel 2.
　３個のサブ画素１０～１２のうち1個は左眼画像、1個は右眼画像、残りの1個が第３の画像を表示する。ここでは、サブ画素１０は右眼画像を表示し、サブ画素１２は左眼画像を表示し、サブ画素１０とサブ画素１２の間に配置されたサブ画素１１が第３の画像を表示する。第３の画像として、実施例１では白画像または黒画像を表示するが、右眼画像および左眼画像と異なる画像であれば白画像または黒画像以外の画像でもよい。 Of the three sub-pixels 10 to 12, one displays the left eye image, one displays the right eye image, and the remaining one displays the third image. Here, the sub pixel 10 displays a right eye image, the sub pixel 12 displays a left eye image, and the sub pixel 11 disposed between the sub pixel 10 and the sub pixel 12 displays a third image. As the third image, a white image or a black image is displayed in the first embodiment, but an image other than the white image or the black image may be used as long as the image is different from the right eye image and the left eye image.
　レンズ１７の両端は、第３の画像を表示するサブ画素１１上に配置されている。すなわち、レンズ１７はサブ画素１１とその次に配置されたサブ画素１１との間に配置されたサブ画素１０および１２を跨ぐように配置されている。 Both ends of the lens 17 are disposed on the sub-pixel 11 that displays the third image. That is, the lens 17 is disposed so as to straddle the sub-pixels 10 and 12 disposed between the sub-pixel 11 and the sub-pixel 11 disposed next thereto.
　レンズ１７のレンズピッチＰｔ１は、画素６の画素ピッチＰｔ２と同じである。液晶パネル２の画面サイズが大きい場合、レンズピッチＰｔ１を画素ピッチＰｔ２よりも小さくしてもよい。より好ましくは、レンズピッチＰｔ１は、サブ画素１０～１２のサブ画素ピッチＰｔ３の２倍以上３倍以下である。 The lens pitch Pt1 of the lens 17 is the same as the pixel pitch Pt2 of the pixel 6. When the screen size of the liquid crystal panel 2 is large, the lens pitch Pt1 may be smaller than the pixel pitch Pt2. More preferably, the lens pitch Pt1 is not less than 2 times and not more than 3 times the subpixel pitch Pt3 of the subpixels 10 to 12.
　次に、サブ画素１０～１２を透過した光の進行について、図４を参照して説明する。サブ画素１０を透過した光ＬｇＲは、各レンズ１７を透過する過程で屈折し、右眼画像結像点ＲＩｐへ集光される。また、サブ画素１２を透過した光ＬｇＬは、各レンズ１７を透過する過程で屈折し、左眼画像結像点ＬＩｐへ集光される。サブ画素１１を透過した光ＬｇＴは、各レンズ１７を透過する過程で屈折し、第３画像結像点ＴＩｐへ集光される。 Next, the progress of light transmitted through the sub-pixels 10 to 12 will be described with reference to FIG. The light LgR that has passed through the sub-pixel 10 is refracted in the process of passing through each lens 17 and is focused on the right-eye image imaging point RIp. In addition, the light LgL that has passed through the sub-pixel 12 is refracted in the process of passing through each lens 17 and is focused on the left-eye image image formation point LIp. The light LgT that has passed through the sub-pixels 11 is refracted in the process of passing through each lens 17 and is condensed on the third image image formation point TIp.
　図５は、立体表示装置１と視覚者との位置関係を示す説明図である。実施例１では、立体表示装置１のレンチキュラレンズ１５から距離ＤＩ離れた平面上に、液晶パネル２の中心を中心として、間隔Ｄｅの位置に視覚者の右眼および左眼が位置するように光学設計されている。実施例１において、距離ＤＩは５００ｍｍ～６００ｍｍ、間隔Ｄｅを６４ｍｍとしている。 FIG. 5 is an explanatory diagram showing a positional relationship between the stereoscopic display device 1 and a viewer. In the first embodiment, the optical system is such that the right and left eyes of the viewer are positioned at a distance De around the center of the liquid crystal panel 2 on a plane that is a distance DI from the lenticular lens 15 of the stereoscopic display device 1. Designed. In the first embodiment, the distance DI is 500 mm to 600 mm, and the interval De is 64 mm.
　図５に示す光学モデルにおいて、左眼画像結像点ＬＩｐおよび右眼画像結像点ＲＩｐは、それぞれ、液晶パネル２と平行な平面上に順に交互に形成される（図６参照）。第３画像結像点ＴＩｐは、隣り合う左眼画像結像点ＬＩｐおよび右眼画像結像点ＲＩｐを挟んで形成される。各結像点の間隔は、視覚者の両眼間隔Ｄｅとなることが好ましい。左眼画像結像点ＬＩｐに視覚者の左眼が、右眼画像結像点ＲＩｐに視覚者の右眼が配置される正視位置に視覚者が位置していると、視覚者は、立体像を正確に視覚することができる。 In the optical model shown in FIG. 5, the left eye image formation point LIp and the right eye image formation point RIp are alternately formed in order on a plane parallel to the liquid crystal panel 2 (see FIG. 6). The third image image formation point TIp is formed across the adjacent left eye image image formation point LIp and right eye image image formation point RIp. The distance between the image forming points is preferably the binocular distance De of the viewer. If the viewer is positioned at the normal viewing position where the left eye of the viewer is positioned at the left eye image image formation point LIp and the right eye of the viewer is positioned at the right eye image image formation point RIp, the viewer is Can be accurately visualized.
　これに対して、視覚者が正視位置以外の位置、すなわち、左眼画像結像点ＬＩｐに視覚者の右眼が配置され、第３画像結像点ＴＩｐに視覚者の左眼が配置される位置、または、右眼画像結像点ＲＩｐに視覚者の左眼が配置され、第３画像結像点ＴＩｐに視覚者の右眼が配置される位置に視覚者が位置すると、立体像が認識されず平面画像が認識される。このようにして、視覚者は自らが正視位置にいないことに気付くことができる。また、第３の画像が白画像の場合、第３画像結像点ＴＩｐにて白画像が認識され、視覚者は、両眼で認識される平面画像が異常に明るく感じられる。これにより、視覚者は自らが正視位置にいないことにより簡易に気付くことができる。視覚者は、液晶パネル２に対して、より中央側に移動することで、正視位置に戻ることができ、立体像を正しく見ることができる。なお、上述のような正視位置以外の位置を、本明細書では、以下、「誤視位置」という。 On the other hand, the viewer's right eye is arranged at a position other than the normal viewing position, that is, the left eye image forming point LIp, and the viewer's left eye is arranged at the third image forming point TIp. A stereoscopic image is recognized when the viewer's left eye is placed at the position or the right eye image imaging point RIp and the viewer's right eye is placed at the third image imaging point TIp. Instead, a planar image is recognized. In this way, the viewer can notice that he is not in the normal viewing position. When the third image is a white image, the white image is recognized at the third image image formation point TIp, and the viewer feels that the planar image recognized by both eyes is abnormally bright. Thereby, the viewer can easily notice that he / she is not in the normal viewing position. The viewer can return to the normal viewing position by moving more to the center side with respect to the liquid crystal panel 2, and can correctly see the stereoscopic image. In the present specification, the position other than the normal viewing position as described above is hereinafter referred to as an “erroneous viewing position”.
　また、第３の画像として黒画像を表示する場合、第３画像結像点ＴＩｐにて黒画像が認識される。すなわち、視覚者が誤視位置にいると、異常に暗い平面画像を見ることになる。これにより、視覚者が自ら正視位置にいないことを認識することができる。図７は第３の画像として黒画像を採用した際の、視覚者が見る照度分布をシミュレーションした図である。 Further, when a black image is displayed as the third image, the black image is recognized at the third image imaging point TIp. That is, when the viewer is in the missight position, an abnormally dark planar image is seen. Thereby, it can be recognized that the viewer is not in the normal viewing position. FIG. 7 is a diagram simulating the illuminance distribution seen by the viewer when a black image is adopted as the third image.
　液晶パネル２の中心から左右それぞれ３２ｍｍのところに、左眼画像結像点ＬＩｐおよび右眼画像結像点ＲＩｐが配置されている。すなわち、液晶パネル２の中心を中心として横方向に６４ｍｍの間隔で左眼画像結像点ＬＩｐおよび右眼画像結像点ＲＩｐが配置されている。第３の画像として黒表示を採用しているので、第３画像結像点ＴＩｐには何も画像が結像されない黒表示となる。この場合、正視位置における左眼画像結像点ＬＩｐから、次の正視位置における右眼画像結像点ＲＩｐまで距離が長く、視覚者の両眼の間隔を越えている。すなわち、視覚者が、左眼画像および右眼画像を反転して見る逆視位置が形成されることがない。このようにして、視覚者が奥行きが反転した立体像を見ることを防止することができる。 The left-eye image image formation point LIp and the right-eye image image formation point RIp are disposed at positions 32 mm from the center of the liquid crystal panel 2 respectively. That is, the left eye image image formation points LIp and the right eye image image formation points RIp are arranged at intervals of 64 mm in the horizontal direction with the center of the liquid crystal panel 2 as the center. Since black display is employed as the third image, black display is performed in which no image is formed at the third image image formation point TIp. In this case, the distance from the left eye image image formation point LIp at the normal viewing position to the right eye image image formation point RIp at the next normal viewing position is long and exceeds the distance between both eyes of the viewer. That is, a reverse viewing position in which the viewer sees the left-eye image and the right-eye image reversed is not formed. In this way, it is possible to prevent a viewer from seeing a stereoscopic image whose depth is reversed.
　また、結像点分割器８としてレンチキュラレンズ１５を採用することで、各画像を表示する各サブ画素間の落ち込みを低減することができる。この効果を図示したものが、図８である。図８は、液晶パネル２の中央に位置する４個の画素６内のサブ画素を、２個のサブ画素間隔で点灯した際の輝度分布図である。２個分のサブ画素間の輝度の落ち込みの幅は、各サブ画素から照射される光の幅よりも小さい。すなわち、左眼画像および右眼画像はそれぞれ各画素６において、３個のサブ画素１０～１２の内の１個のサブ画素からしか表示されないが、レンズ１７により、３個分のサブ画素の幅にまで拡大される。 Further, by using the lenticular lens 15 as the imaging point divider 8, it is possible to reduce the drop between the sub-pixels displaying each image. This effect is illustrated in FIG. FIG. 8 is a luminance distribution diagram when the sub-pixels in the four pixels 6 located in the center of the liquid crystal panel 2 are lit at intervals of two sub-pixels. The width of the luminance drop between the two sub-pixels is smaller than the width of the light emitted from each sub-pixel. That is, the left-eye image and the right-eye image are displayed only from one of the three sub-pixels 10 to 12 in each pixel 6, but the width of the three sub-pixels by the lens 17 is displayed. It is expanded to.
　実施例１の発明によれば、左眼画像を表示する画素と、右眼画像を表示する画素と、第３の画像を表示する画素とから出射される光をレンチキュラレンズ１５を用いて、各画像の結像点を順に分割して形成する。すなわち、正視位置における左眼画像結像点ＬＩｐと次の正視位置における右眼画像結像点ＲＩｐ、または、正視位置における右眼画像結像点ＲＩｐと次の正視位置における左眼画像結像点ＬＩｐとの間に、第３画像結像点ＴＩｐを形成する。言い換えると、第３画像結像点ＴＩｐを、隣り合わせて形成する左眼画像結像点ＬＩｐおよび右眼画像結像点ＲＩｐを間に挟んで形成する。 According to the invention of the first embodiment, the light emitted from the pixel that displays the left eye image, the pixel that displays the right eye image, and the pixel that displays the third image is transmitted to each pixel using the lenticular lens 15. The image formation points are formed by sequentially dividing the image. That is, the left eye image image formation point LIp at the normal vision position and the right eye image image formation point RIp at the next normal vision position, or the right eye image image formation point RIp at the normal vision position and the left eye image image formation point at the next normal vision position. A third image imaging point TIp is formed between the LIp and the LIp. In other words, the third image image formation point TIp is formed with the left eye image image formation point LIp and the right eye image image formation point RIp formed adjacent to each other.
　これにより、正視位置における左眼画像結像点ＬＩｐと次の正視位置における右眼画像結像点ＲＩｐ、または、正視位置における右眼画像結像点ＲＩｐと次の正視位置における左眼画像結像点ＬＩｐとの距離が視覚者の両眼間隔Ｄｅを越えるので、逆視位置が形成されず、視覚者が立体像を逆視することを防止することができる。また、視覚者が誤視位置にいると、左眼画像または右眼画像と第３の画像との合成画像である平面画像が見えるので、立体像を見ることができず、正視位置にいないことに自ら気付くことができる。また、サブ画素１０、１２単位で左眼画像および右眼画像を表示するので、解像度を低下させることなく単色立体像を表示することができる。 Thereby, the left eye image imaging point LIp at the normal vision position and the right eye image imaging point RIp at the next normal vision position, or the right eye image imaging point RIp at the normal vision position and the left eye image imaging point at the next normal vision position. Since the distance to the point LIp exceeds the binocular distance De of the viewer, no reverse viewing position is formed, and the viewer can be prevented from viewing the stereoscopic image backward. In addition, when the viewer is in the missighted position, a planar image that is a left-eye image or a composite image of the right-eye image and the third image can be seen, so that the stereoscopic image cannot be seen and is not in the right-viewing position. You can notice yourself. Further, since the left eye image and the right eye image are displayed in units of sub-pixels 10 and 12, a monochromatic stereoscopic image can be displayed without reducing the resolution.
　次に、図９から図１１を参照して実施例２に係る立体表示装置１’について説明する。図９は、実施例２における立体表示装置の概略構成を示すブロック図であり、図１０は実施例２における画素とレンチキュラレンズとを示す斜視図であり、図１１は画素とレンチキュラレンズとを示す断面図である。図９から図１１において、実施例１に示した符号と同一の符号で示した部分は、実施例１と同様の構成であるのでここでの説明は省略する。また、以下に記載した以外の立体表示装置１’の構成は実施例１と同様である。 Next, the stereoscopic display device 1 ′ according to the second embodiment will be described with reference to FIGS. 9 to 11. FIG. 9 is a block diagram illustrating a schematic configuration of the stereoscopic display device according to the second embodiment, FIG. 10 is a perspective view illustrating the pixels and the lenticular lens according to the second embodiment, and FIG. 11 illustrates the pixels and the lenticular lens. It is sectional drawing. 9 to 11, the portions denoted by the same reference numerals as those shown in the first embodiment have the same configuration as that of the first embodiment, and thus the description thereof is omitted here. The configuration of the stereoscopic display device 1 ′ other than those described below is the same as that of the first embodiment.
　実施例１では、サブ画素単位で左眼画像、右眼画像および第３の画像を表示しているが、実施例２では、画素単位で左眼画像、右眼画像および第３の画像を表示する。すなわち、レンチキュラレンズ１５’のレンズ１７’の幅が３画素を覆うように配置されている。 In the first embodiment, the left eye image, the right eye image, and the third image are displayed in units of sub-pixels. In the second embodiment, the left eye image, the right eye image, and the third image are displayed in units of pixels. To do. That is, the width of the lens 17 'of the lenticular lens 15' is arranged so as to cover three pixels.
　実施例２の特徴は、画素６単位で左眼画像、右眼画像および第３の画像を表示することにある。また、各画素６には、実施例１と同様に３個のサブ画素１０’～１２’を有する。サブ画素１０’～１２’の前面には、Ｒ，Ｇ、Ｂのカラーフィルタが設けられている。これにより、実施例２の立体表示装置１’は、カラーの立体像を表示することができる。 A feature of the second embodiment is that a left eye image, a right eye image, and a third image are displayed in units of 6 pixels. Each pixel 6 includes three sub-pixels 10 'to 12' as in the first embodiment. R, G, and B color filters are provided in front of the sub-pixels 10 'to 12'. Accordingly, the stereoscopic display device 1 ′ according to the second embodiment can display a color stereoscopic image.
　実施例２における液晶駆動部２０は、実施例１における液晶駆動部７の機能に加えて、映像信号割当部２１およびサブ画素駆動部２２を備える。映像信号割当部２１は、左眼画像信号、右眼画像信号および第３の画像信号をどの画素６に送るかを割り当てる。サブ画素駆動部２２は、各画素に割り当てられた画像信号のＲ、Ｇ，Ｂ値を基に、サブ画素１０’～１２’の液晶に印加する電圧を制御する。 The liquid crystal driving unit 20 in the second embodiment includes a video signal allocation unit 21 and a sub-pixel driving unit 22 in addition to the function of the liquid crystal driving unit 7 in the first embodiment. The video signal assigning unit 21 assigns to which pixel 6 the left eye image signal, the right eye image signal, and the third image signal are sent. The sub-pixel driver 22 controls the voltage applied to the liquid crystals of the sub-pixels 10 'to 12' based on the R, G, and B values of the image signal assigned to each pixel.
　また、実施例２におけるレンチキュラレンズ１５’のレンズ１７’は、画素６の３個分の幅を有する。レンズ１７’の両端は、第３の画像を表示する画素６上に配置される。すなわち、レンズ１７’は左眼画像を表示する画素６とその隣に配置された右眼画像を表示する画素６を跨ぐように配置されている。 Further, the lens 17 ′ of the lenticular lens 15 ′ in Example 2 has a width corresponding to three pixels 6. Both ends of the lens 17 ′ are disposed on the pixel 6 that displays the third image. That is, the lens 17 ′ is disposed so as to straddle the pixel 6 that displays the left-eye image and the pixel 6 that displays the right-eye image disposed adjacent thereto.
　レンズ１７’のレンズピッチＰｔ１’は、画素６の画素ピッチＰｔ２の３倍である。液晶パネル２の画面サイズが大きい場合、レンズピッチＰｔ１’を画素ピッチＰｔ２の３倍よりも小さくしてもよい。より好ましくは、レンズピッチＰｔ１’は、画素ピッチＰｔ２の２倍以上３倍以下である。 The lens pitch Pt1 'of the lens 17' is three times the pixel pitch Pt2 of the pixel 6. When the screen size of the liquid crystal panel 2 is large, the lens pitch Pt1 'may be smaller than three times the pixel pitch Pt2. More preferably, the lens pitch Pt1 'is not less than 2 times and not more than 3 times the pixel pitch Pt2.
　実施例２の立体表示装置１’によれば、実施例１と比べて解像度が低下するものの、カラーで立体表示することができる。また、視覚者が誤視位置にいると、立体像を見ることができないので、正視位置にいないことに自ら気付くことができる。また、逆視位置が形成されないので、視覚者が立体像を逆視することを防止することができる。 According to the stereoscopic display device 1 ′ of the second embodiment, although the resolution is lower than that of the first embodiment, a three-dimensional display can be performed in color. In addition, when the viewer is in the missighted position, the stereoscopic image cannot be seen, so that the viewer can be aware that the viewer is not in the normal viewing position. Moreover, since the reverse viewing position is not formed, it is possible to prevent the viewer from looking back on the stereoscopic image.
　本発明は、上記実施形態に限られることはなく、下記のように変形実施することができる。 The present invention is not limited to the above embodiment, and can be modified as follows.
　上述した実施例では、結像点分割器８としてレンチキュラレンズ１５を用いたがこれに限らず、パララックスバリアを用いてもよい。図１２には、結像点分割器８としてパララックスバリア３１を用いた場合の、画素６から出射した光の進行を示している。パララックスバリア３１を用いても、左眼画像結像点ＬＩｐ、右眼画像結像点ＲＩｐおよび第３画像結像点ＴＩｐを順に形成することができる。これにより、視覚者が正視位置にいない場合、そのことを視覚者に気付かせることができる。 In the above-described embodiment, the lenticular lens 15 is used as the imaging point divider 8, but the present invention is not limited to this, and a parallax barrier may be used. FIG. 12 shows the progress of light emitted from the pixel 6 when the parallax barrier 31 is used as the imaging point divider 8. Even using the parallax barrier 31, the left-eye image image formation point LIp, the right-eye image image formation point RIp, and the third image image formation point TIp can be formed in order. Thereby, when the viewer is not in the normal viewing position, this can be noticed by the viewer.
　１　…　立体表示装置
　２　…　液晶パネル
　６　…　画素
　８　…　結像点分割器
　１０、１１、１２　…　サブ画素
　１５　…　レンチキュラレンズ
　１７　…　レンズ
　ＬＩｐ　…　左眼画像結像点
　ＲＩｐ　…　右眼画像結像点
　ＴＩｐ　…　第３画像結像点 DESCRIPTION OF SYMBOLS 1 ... Stereoscopic display device 2 ... Liquid crystal panel 6 ... Pixel 8 ... Imaging point splitter 10, 11, 12 ... Sub pixel 15 ... Lenticular lens 17 ... Lens LIp ... Left eye image imaging point RIp ... Right eye image imaging point TIp ... Third image focus point

Claims (6)

  1. 　左眼用画像を表示する第１表示画素と、
    　右眼用画像を表示する第２表示画素と、
    　前記左眼用画像および前記右眼用画像とは異なる別の画像を第３表示画像として表示する第３表示画素とを備える液晶パネルと、
    　前記第１表示画素、前記第２表示画素および前記第３表示画素から表示される各画像の結像点を分割して形成する結像点分割器とを備え、
    　前記結像点分割器は、
    　前記左眼用画像、前記右眼用画像および前記第３表示画像の結像点を順に形成し、　
    　前記左眼用画像および前記右眼用画像の結像点を隣り合わせて形成し、
    　前記第３表示画像の結像点を、隣り合う前記左眼用画像および前記右眼用画像の結像点を挟んで形成する
    　ことを特徴とする立体表示装置。     A first display pixel that displays an image for the left eye;
    A second display pixel that displays an image for the right eye;
    A liquid crystal panel including a third display pixel that displays another image different from the left-eye image and the right-eye image as a third display image;
    An imaging point divider that divides and forms the imaging point of each image displayed from the first display pixel, the second display pixel, and the third display pixel;
    The imaging point divider is
    Forming the image point of the left eye image, the right eye image and the third display image in order;
    Forming the image points of the left-eye image and the right-eye image next to each other;
    An image forming point of the third display image is formed across an image forming point of the adjacent image for the left eye and the image for the right eye.
  2. 　請求項１に記載の立体表示装置において、
    　前記結像点分割器は、前記液晶パネルの前面に配置されるレンチキュラレンズである
    　ことを特徴とする立体表示装置。     The stereoscopic display device according to claim 1,
    The image forming point divider is a lenticular lens disposed in front of the liquid crystal panel.
  3. 　請求項１または２に記載の立体表示装置において、
    　前記液晶パネルは、
    　前記第１表示画素、前記第２表示画素、および前記第３表示画素をサブ画素として有する表示画素を備える
    　ことを特徴とする立体表示装置。     The stereoscopic display device according to claim 1 or 2,
    The liquid crystal panel is
    A stereoscopic display device comprising: a display pixel having the first display pixel, the second display pixel, and the third display pixel as sub-pixels.
  4. 　請求項３に記載の立体表示装置において、
    　前記レンチキュラレンズのレンズ幅は、前記サブ画素の幅の２倍よりも長く、３倍よりも短い
    　ことを特徴とする立体表示装置。     The stereoscopic display device according to claim 3,
    The three-dimensional display device, wherein the lens width of the lenticular lens is longer than twice the width of the sub-pixel and shorter than three times.
  5. 　請求項１から４のいずれか１つに記載の立体表示装置において、
    　前記第３表示画像は、黒画像である
    　ことを特徴とする立体表示装置。     The stereoscopic display device according to any one of claims 1 to 4,
    The third display image is a black image. A stereoscopic display device, wherein:
  6. 　請求項１から４のいずれか１つに記載の立体表示装置において、
    　前記第３表示画像は、白画像である
    　ことを特徴とする立体表示装置。     The stereoscopic display device according to any one of claims 1 to 4,
    The stereoscopic display device, wherein the third display image is a white image.
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JP2002318369A (en) * 2001-04-20 2002-10-31 Sanyo Electric Co Ltd Stereoscopic video display device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0728015A (en) * 1993-07-08 1995-01-31 Sharp Corp Three-dimensional display device
JPH09297284A (en) * 1996-04-30 1997-11-18 Nec Corp Three-dimensional display device
JP2002318369A (en) * 2001-04-20 2002-10-31 Sanyo Electric Co Ltd Stereoscopic video display device

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