US5019897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning apparatus for reading a color image
Assignee: Sony Corp
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Filing: 1989-06-30
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Granted: 1991-05-28
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Expires: 2009-06-30
Abstract
Abstract There is provided a color image reading apparatus in which a directivity is given to the light emitted from a non-directinal light source and when the reading position changes, the reflected light of the light emitted from the non-directional light source is reduced in substantially the same manner as the reflected light of the light emitted from a directional light source, thereby preventing the color tone deviation which occurs because the directional light source and non-directional light source are mixedly provided.
Inventors
- 👤 Atsushi Shirata
- 👤 Kiyosuke Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:40
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/024; H04N1/028; H04N1/02815; H04N1/02845; H04N1/02865; H04N1/0287
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A scanning apparatus for properly reading a color image of an original, even when said original is not perfectly flat, comprising: light means for emitting light to a detected line of the original, said light including a plurality of color light sources having a first source of light having a length substantially equal to the width of he original for emitting a directional light corresponding to first and second colors and a second source of light having a length substantially equal to the width of the original for emitting a non-directional light corresponding to a third color; control means for sequentially switching lighting operations of said first and second color light sources; a photoelectric transferring device for receiving a reflected light, said reflected light being reflected from said detected line of the original; and slit plate means arranged between said second source of light and said detected line of the original, for giving a directivity to said second source of light.
Claim 2
Dependent Claim
161 words
A scanning apparatus for properly reading a color image of an original, even when said original is not perfectly flat, comprising: light means for emitting light to a detected line of the original, said light including a plurality of color light sources having a first source of light having a length substantially equal to the width of he original for emitting a directional light corresponding to first and second colors and a second source of light having a length substantially equal to the width of the original for emitting a non-directional light corresponding to a third color; control means for sequentially switching lighting operations of said first and second color light sources; a photoelectric transferring device for receiving a reflected light, said reflected light being reflected from said detected line of the original; and slit plate means arranged between said second source of light and said detected line of the original, for giving a directivity to said second source of light.
Claim 3
Dependent Claim
26 words
An apparatus according to claim 1, wherein said first source of light includes a light emitting device and said second source of light includes fluorescent means.
Claim 4
Dependent Claim
31 words
An apparatus according to claim 2, wherein said first source of light includes a red LED and a green LED and said second source of light includes a blue fluorescent light.
Claim 5
Dependent Claim
41 words
An apparatus according to claim 3, wherein said first source of light is a light emitting diode unit comprising a plurality of red LEDs and a plurality of green LEDs which are arranged in a straight line on a base plate.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 1, wherein said photoelectric transferring device is a line sensor having a length approximately the same as a width of the original.
Claim 7
Dependent Claim
23 words
An apparatus according to claim 1, further comprising a multi-lens array through which said reflected light is supplied to said photoelectric transferring device.
Claim 8
Dependent Claim
56 words
An apparatus according to claim 1, wherein said light means and said optical means are arranged in a manner such that the directional light emitted from the first source of light and the non-directional light emitted from the second source of light are irradiated to said detected line of the original at an approximately same angle.
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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |