Apparatus for direct display of an image on the retina of the eye using a scanning laser
First Claim
1. A direct viewing picture image display apparatus comprising:
- a light source for emitting a laser beam;
video signal supplying means for supplying a video signal;
modulating means for optically modulating the laser beam emitted from said light source in response to the video signal supplied from said video signal supplying means;
a variable focus optical means for providing depth information to the modulated laser beam received from said modulating means;
scanning signal supplying means for supplying a scanning signal;
scanning means responsive to said scanning signal for causing said modulated laser beam received from said variable focus optical means to effect a horizontal and vertical scan; and
a projecting optical system for projecting and focusing the scanning laser beam received from said scanning means to form an image of the scanned, modulated laser beam directly on the retina of an eye of a user of the picture image display apparatus.
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Accused Products
Abstract
A direct viewing picture image display apparatus displays a good picture image with a small amount of light and low power consumption using a laser beam without producing speckle noises. The display apparatus comprises a light source for emitting a laser beam, an optical modulating system for optically modulating the laser beam from the light source in response to a video signal, a scanning system for horizontally and vertically scanning the modulated laser beam from the scanning signal in response to a scanning signal, and a projecting optical system for projecting the scanned laser beam from the scanning system to form an image of the laser beam on the retina of an eye of an observer. Depth information is provided to the laser beam at a suitable stage after optical modulation by the optical modulating system so that a stereoscopic image is displayed.
191 Citations
20 Claims
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1. A direct viewing picture image display apparatus comprising:
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a light source for emitting a laser beam; video signal supplying means for supplying a video signal; modulating means for optically modulating the laser beam emitted from said light source in response to the video signal supplied from said video signal supplying means; a variable focus optical means for providing depth information to the modulated laser beam received from said modulating means; scanning signal supplying means for supplying a scanning signal; scanning means responsive to said scanning signal for causing said modulated laser beam received from said variable focus optical means to effect a horizontal and vertical scan; and a projecting optical system for projecting and focusing the scanning laser beam received from said scanning means to form an image of the scanned, modulated laser beam directly on the retina of an eye of a user of the picture image display apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20)
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12. A direct viewing picture image display apparatus comprising:
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a light source for emitting a laser beam; video signal supplying means for supplying a video signal; modulating means for optically modulating the laser beam emitted from said light source in response to the video signal supplied from said video signal supplying means; depth signal supplying means for supplying depth information; a variable focus optical system for providing the depth information supplied from said depth signal supplying means to the modulated laser beam received from said modulating means; scanning signal supplying means for supplying a scanning signal; scanning means for effecting scanning by the laser beam received from said variable focus optical system in response to the scanning signal supplied from said scanning signal supplying means; and a projecting optical system for projecting the scanning laser beam received from said scanning means to form an image of the laser beam on the retina of an eye of a user of the picture image display apparatus. - View Dependent Claims (15)
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13. A direct viewing picture image display apparatus comprising:
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a light source for emitting a laser beam; video signal supplying means for supplying a video signal; modulating means for optically modulating the laser beam emitted from said light source in response to the video signal supplied from said video signal supplying means; depth signal supplying means for supplying depth information; scanning signal supplying means for supplying a scanning signal; scanning means for effecting scanning by the laser beam received from said modulating means in response to the scanning signal supplied from said signal scanning signal supplying means, said scanning means including a variable focus optical system for providing the depth information supplied from said depth signal supplying means to the laser beam received from said modulating means; and a projecting optical system for projecting the scanning laser beam received from said scanning means to form an image of the laser beam on the retina of an eye of a user of the picture image display apparatus.
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14. A direct viewing picture image display apparatus comprising:
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a light source for emitting a laser beam; video signal supplying means for supplying a video signal; modulating means for optically modulating the laser beam emitted from said light source in response to the video signal supplied from said video signal supplying means; depth signal supplying means for supplying depth information; scanning signal supplying means for supplying a scanning signal; scanning means for effecting scanning by the laser beam received from said modulating means in response to the scanning signal supplied from said scanning signal supplying means; and a projecting optical system for projecting the scanning laser beam received from said scanning means to form an image of the laser beam on the retina of an eye of a user of the picture image display apparatus, said optical system including a variable focus optical system for providing the depth information supplied from said depth signal supplying means to the laser beam received from said scanning means.
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16. A direct viewing picture image display apparatus comprising:
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a light source for emitting a linearly polarized laser beam; means for dividing the laser beam from said light source into first and second laser beams; first and second video signal supplying means for supplying first and second video signals, respectively; first and second modulating means for optically modulating the first and second laser beams from said dividing means in response to the first and second video signals supplied from said first and second video signal supplying means, respectively; first and second depth signal supplying means for supplying first and second depth information; first and second variable focus optical system for providing the first and second depth information supplied from said first and second depth signal supplying means to the modulated laser beams received from said first and second modulating means, respectively; means for rotating the laser beam from said second variable focus optical system to produce a laser beam having a polarization plane perpendicular to that of the output laser beam of said first variable focus optical system; means for combining the laser beams from said first variable focus optical system and said rotating means into a single laser beam; scanning signal supplying means for supplying a scanning signal; scanning means for effecting scanning by the laser beam received from said combining means in response to the scanning signal supplied from said scanning signal supplying means; and a projecting optical system for dividing the scanning laser beam received from said scanning means into two beams having perpendicular polarization planes relative to each other and projecting the two beams to form images of the beams on the retinae of a pair of eyes of a user of the picture image display apparatus. - View Dependent Claims (17, 18, 19)
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Specification