Three-dimensional image display

{
  "publication_number": "US7446733B1",
  "country": "US",
  "kind": "B1",
  "title": "Three-dimensional image display",
  "abstract": "The present invention provides a three-dimensional image display capable of presenting stereoscopic display in a true sense not only for a still image but also for a dynamic image without any need for a dedicated eyeglass or coherent light. A multiplicity of screen dots (11) formed by LCDs which allows simple changes of the contents of an image are arranged on a three-dimensional display screen (10), and object images formed by the LCDs are projected in a space to form a multiplicity of point light source images (P) that form a three-dimensional image (R) to be displayed. A viewer (Q) can view the same as a stereoscopic image.",
  "claims": [
    "1. A three-dimensional image display comprising: two-dimensional image forming means for forming a plurality of two-dimensional images by scanning light which has been subjected to time-modulation based on information on rearrangement of data of each pixel of the plurality of two-dimensional images, such that the scanning light projects the plurality of two-dimensional images pixel-by-pixel by cyclically projecting one pixel from each of the plurality of two-dimensional images, before projecting another pixel from each of the plurality of two-dimensional images; and three-dimensional image forming means for forming a three-dimensional image by projecting the plurality of two-dimensional images formed by the two-dimensional image forming means in directions different from each other.",
    "2. A three-dimensional image display according to claim 1, wherein the three-dimensional image forming means projects the plurality of two-dimensional images in directions different from each other by reflecting the light scanned by the two-dimensional image forming means in different directions in accordance with positions of incidence.",
    "3. A three-dimensional image display according to claim 2, wherein the three-dimensional image forming means has a region in which position information used for controlling the positions of incidence of the light scanned by the two-dimensional image forming means is recorded.",
    "4. A three-dimensional image display according to claim 2, wherein the three-dimensional image forming means has a region in which synchronization information for synchronized control of the display as a whole is recorded.",
    "5. A three-dimensional image display according to claim 1, wherein the three-dimensional image forming means is fixed.",
    "6. A three-dimensional image display comprising: two-dimensional image forming means for forming a plurality of two-dimensional images by emitting light carrying information on a plurality of two-dimensional images; and three-dimensional image forming means for forming a three-dimensional image by projecting the light emitted by the two-dimensional image forming means in different directions in accordance with positions of incidence to project the plurality of two-dimensional images in directions different from each other, wherein the three-dimensional image forming means has a region in which position information used for controlling the positions of incidence of the light emitted by the two-dimensional image forming means is recorded.",
    "7. A three-dimensional image display according to claim 6, wherein the three-dimensional image forming means further has a region in which synchronization information for synchronized control of the display as a whole is recorded.",
    "8. A three-dimensional image display according to claim 6, wherein the position information recorded in the region of the three-dimensional image forming means is optically readable information."
  ],
  "description_excerpt": "The present invention relates to a three-dimensional image display capable of displaying a stereoscopic image in a space.\n\nVarious proposals have recently been made on techniques for displaying a stereoscopic image as a result of the progress of optical technologies. One of such techniques is two-glass type three-dimensional viewers such as IMAX THEATER (trademark) capable of presenting stereoscopic display to a user who wears dedicated eyeglasses to see an image formed by an image for the left eye and an image for the right eye in an overlapping relationship. This apparatus can present stereoscopic display in the form of a stereogram utilizing parallax between left and right eyes.\n\nStereoscopic display is also performed with holography utilizing coherent light from a laser or the like. This technique is to display a stereoscopic image by forming a hologram on a dry plate or the like using object light and reference light in advance and by irradiating the hologram with the original reference light to obtain reproduction light.\n\nFurther, there are lens plate three-dimensional image display techniques represented by the so-called IP (integral photography) method.",
  "cpc": [
    "G02B 3/005",
    "G02B 3/0062",
    "G02B 3/0068",
    "G02B 30/27",
    "G02B 30/56",
    "G03B 35/18"
  ],
  "ipc": [
    "G02B 30/27",
    "G03B 21/00",
    "G03B 35/18",
    "G09G 3/00",
    "G09G 5/00"
  ],
  "inventors": [
    "Hideyoshi Hirimai"
  ],
  "filing_date": "1999-03-24",
  "publication_date": "2008-11-04",
  "grant_date": "2008-11-04",
  "priority_date": "1998-03-27",
  "application_number": "US-64622899-A",
  "family_id": "26422688",
  "cited_by_count": 130,
  "citations": [
    "US4429946A",
    "US5132839A",
    "US5689316A",
    "JPH05273675A",
    "EP0650301A2",
    "US5519533A",
    "JPH07318858A",
    "US6157474A",
    "US6590680B2",
    "JPH08171074A",
    "JPH0954281A",
    "JPH09113846A",
    "US5954414A",
    "US6421174B1",
    "US6108029A",
    "US6798390B1",
    "US6600600B2",
    "US6650396B2"
  ]
}