Patent US5717200A successfully refreshed from Google Patents.
US5717200A
Expired / Lapsed
US
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Image reader
Assignee: Minolta Co Ltd
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Filing: 1996-09-04
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Granted: 1998-02-10
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Expires: 2016-09-04
Abstract
Abstract A projector projects an image. A scanning mirror deflects the projected image by mirror oscillation method. A reading device reads the projected image deflected by said scanning mirror and outputs an image data corresponding to the projected image. A discriminating device discriminates which projection lens is mounted on said projection lens mount among said plurality of lenses. A memory device stores respective distortion data of said plurality of projection lenses and distortion data concerned with a distortion being due to the oscillation method. A correcting device corrects distortion of the distortion data of the projection lens which is discriminated to be mounted on the projection lens mount and the distortion data concerned with a distortion being due to the oscillation method.
Inventors
- 👤 Yoshiyuki Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:43
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7408
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
81 words
A projected image reading apparatus comprising: a projector which projects an image; a scanning mirror which deflects the projected image by mirror oscillation method; reading means for reading the projected image deflected by said scanning mirror and outputting an image data corresponding to the projected image; memory means for storing distortion data which is concerned with a distortion due to the mirror oscillation method; and correcting means for correcting the distortion of the image data in accordance with the distortion data.
Claim 2
Dependent Claim
81 words
A projected image reading apparatus comprising: a projector which projects an image; a scanning mirror which deflects the projected image by mirror oscillation method; reading means for reading the projected image deflected by said scanning mirror and outputting an image data corresponding to the projected image; memory means for storing distortion data which is concerned with a distortion due to the mirror oscillation method; and correcting means for correcting the distortion of the image data in accordance with the distortion data.
Claim 3
Dependent Claim
60 words
A projected image reading apparatus according to claim 1, wherein said scanning mirror rotates from a start position to an end position, when said scanning mirror is located at the start position, a top edge of the projected image is read, when said scanning mirror is located at the end position, a bottom edge of the projected image is read.
Claim 4
Dependent Claim
24 words
A projected image reading apparatus according to claim 2, wherein said reading means is a line sensor which is provided at a fixed position.
Claim 5
Dependent Claim
24 words
A projected image reading apparatus according to claim 1, wherein said correcting means corrects the distortion of the image data by electrically changing magnification.
Claim 6
Dependent Claim
125 words
A projected image reading apparatus comprising: a projection lens mount for mounting one of projection lens among a plurality of projection lenses mountable on the projection lens mount; reading means for reading an image projected through the projection lens mounted on said projection lens mount by its relative movement to the projected image and outputting an image data corresponding to the projected image; memory means for storing respective distortion data of said plurality of projection lenses; discriminating means for discriminating which projection lens is mounted on said projection lens mount among said plurality of lenses; and correcting means for correcting distortion of the image data based on the distortion data of the projection lens which is discriminated to be mounted on the projection lens mount.
Claim 7
Dependent Claim
125 words
A projected image reading apparatus comprising: a projection lens mount for mounting one of projection lens among a plurality of projection lenses mountable on the projection lens mount; reading means for reading an image projected through the projection lens mounted on said projection lens mount by its relative movement to the projected image and outputting an image data corresponding to the projected image; memory means for storing respective distortion data of said plurality of projection lenses; discriminating means for discriminating which projection lens is mounted on said projection lens mount among said plurality of lenses; and correcting means for correcting distortion of the image data based on the distortion data of the projection lens which is discriminated to be mounted on the projection lens mount.
Claim 8
Dependent Claim
24 words
A projected image reading apparatus according to claim 5, wherein said correcting means corrects the distortion of the image data by electrically changing magnification.
Claim 9
Dependent Claim
36 words
A projected image reading apparatus according to claim 5, wherein said projection lenses have respective magnetic information, said discriminating means discriminates which projection lens is mounted on said projection lens mount based on the magnetic information.
Claim 10
Dependent Claim
107 words
A projected image reading apparatus comprising: a projector which projects an image, having a zoom projection lens variable magnification; reading means for reading an image projected through the zooming projection lens by its relative movement to the projected image and outputting an image data corresponding to the projected image; memory means for storing respective distortion data concerned with magnification of said plurality of zooming projection lens; discriminating means for discriminating a current magnification of the zooming projection lens; correcting means for correcting distortion of the image data based on the distortion data corresponding to magnification of the zooming projection lens which is discriminated by said discriminating means.
Claim 11
Dependent Claim
107 words
A projected image reading apparatus comprising: a projector which projects an image, having a zoom projection lens variable magnification; reading means for reading an image projected through the zooming projection lens by its relative movement to the projected image and outputting an image data corresponding to the projected image; memory means for storing respective distortion data concerned with magnification of said plurality of zooming projection lens; discriminating means for discriminating a current magnification of the zooming projection lens; correcting means for correcting distortion of the image data based on the distortion data corresponding to magnification of the zooming projection lens which is discriminated by said discriminating means.
Claim 12
Dependent Claim
24 words
A projected image reading apparatus according to claim 8, wherein said correcting means corrects the distortion of the image data by electrically changing magnification.
Claim 13
Dependent Claim
129 words
A projected image reading apparatus comprising: a projector which projects an image; a scanning mirror which deflects the projected image by mirror oscillation method; reading means for reading the projected image deflected by said scanning mirror and outputting an image data corresponding to the projected image; discriminating means for discriminating which projection lens is mounted on said projection lens mount among said plurality of lenses; memory means for storing respective distortion data of said plurality of projection lenses and distortion data concerned with a distortion being due to the oscillation method; correcting means for correcting distortion of the distortion data of the projection lens which is discriminated to be mounted on the projection lens mount and the distortion data concerned with a distortion being due to the oscillation method.
Claim 14
Dependent Claim
129 words
A projected image reading apparatus comprising: a projector which projects an image; a scanning mirror which deflects the projected image by mirror oscillation method; reading means for reading the projected image deflected by said scanning mirror and outputting an image data corresponding to the projected image; discriminating means for discriminating which projection lens is mounted on said projection lens mount among said plurality of lenses; memory means for storing respective distortion data of said plurality of projection lenses and distortion data concerned with a distortion being due to the oscillation method; correcting means for correcting distortion of the distortion data of the projection lens which is discriminated to be mounted on the projection lens mount and the distortion data concerned with a distortion being due to the oscillation method.
Claim 15
Dependent Claim
60 words
A projected image reading apparatus according to claim 10, wherein said scanning mirror rotates from a start position to an end position, when said scanning mirror is located at the start position, a top edge of the projected image is read, when said scanning mirror is located at the end position, a bottom edge of the projected image is read.
Claim 16
Dependent Claim
24 words
A projected image reading apparatus according to claim 11, wherein said reading means is a line sensor which is provided at a fixed position.
Claim 17
Dependent Claim
24 words
A projected image reading apparatus according to claim 10, wherein said correcting means corrects the distortion of the image data by electrically changing magnification.
Claim 18
Dependent Claim
36 words
A projected image reading apparatus according to claim 10, wherein said projection lenses have respective magnetic information, said discriminating means discriminates which projection lens is mounted on said projection lens mount based on the magnetic information.
Claim 19
Dependent Claim
138 words
A projected image reading apparatus comprising: a projector which projects an image, having a zoom projection lens variable magnification; a scanning mirror which deflects the projected image by mirror oscillation method; reading means for reading the projected image deflected by said scanning mirror and outputting an image data corresponding to the projected image; discriminating means for discriminating a current magnification of the zooming projection lens; memory means for storing respective distortion data concerned with magnification of said plurality of zooming projection lens and distortion data concerned with a distortion being due to the oscillation method; correcting means for correcting distortion of the image data based on the distortion data corresponding to magnification of the zooming projection lens which is discriminated by said discriminating means and the distortion data concerned with a distortion being due to the oscillation method.
Claim 20
Dependent Claim
138 words
A projected image reading apparatus comprising: a projector which projects an image, having a zoom projection lens variable magnification; a scanning mirror which deflects the projected image by mirror oscillation method; reading means for reading the projected image deflected by said scanning mirror and outputting an image data corresponding to the projected image; discriminating means for discriminating a current magnification of the zooming projection lens; memory means for storing respective distortion data concerned with magnification of said plurality of zooming projection lens and distortion data concerned with a distortion being due to the oscillation method; correcting means for correcting distortion of the image data based on the distortion data corresponding to magnification of the zooming projection lens which is discriminated by said discriminating means and the distortion data concerned with a distortion being due to the oscillation method.
Claim 21
Dependent Claim
60 words
A projected image reading apparatus according to claim 15, wherein said scanning mirror rotates from a start position to an end position, when said scanning mirror is located at the start position, a top edge of the projected image is read, when said scanning mirror is located at the end position, a bottom edge of the projected image is read.
Claim 22
Dependent Claim
24 words
A projected image reading apparatus according to claim 16, wherein said reading means is a line sensor which is provided at a fixed position.
Claim 23
Dependent Claim
24 words
A projected image reading apparatus according to claim 15, wherein said correcting means corrects the distortion of the image data by electrically changing magnification.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-09 | 2001-08-11 | 2002-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-09 | 2005-08-11 | 2006-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-09 | 2009-08-11 | 2010-02-10 | $7700.00 | Window Closed / Lapsed |