US4926058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image reading apparatus with block lighting and pulsing
Assignee: Canon Inc
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Filing: 1987-01-23
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Granted: 1990-05-15
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Expires: 2007-01-23
Abstract
Abstract An image reading apparatus in which a plurality of light sources are provided and the lights emitted from the light sources are incident on to photoelectric converting means from an object to be read, thereby reading an image of the object; and dividing the light sources into a plurality of blocks, for sequentially divisionally lighting on the light sources every block, and for lighting on, in a pulse-like manner, the light sources of the blocks which are not divisionally lit on.
Inventors
- 👤 Hirofumi Iwamoto
- 👤 Tatsundo Kawai
- 👤 Makoto Ogura
- 👤 Katsumi Nakagawa
- 👤 Shinichi Seitoh
- 👤 Noriyuki Kaifu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:35
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/02815; H04N1/02845; H04N1/02865; H04N1/40; H04N1/40056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
An image reading apparatus in which a plurality of light sources are provided and the lights emitted from said light sources are incident on photoelectric converting means from an object to be read, thereby reading an image of the object, comprising: light-on control circuitry for dividing said light sources into a plurality of blocks, for sequentially divisionally lighting on the light sources every block, and for lighting on, in a pulse-like manner, the light sources of the blocks which are not divisionally lit on.
Claim 2
Dependent Claim
84 words
An image reading apparatus in which a plurality of light sources are provided and the lights emitted from said light sources are incident on photoelectric converting means from an object to be read, thereby reading an image of the object, comprising: light-on control circuitry for dividing said light sources into a plurality of blocks, for sequentially divisionally lighting on the light sources every block, and for lighting on, in a pulse-like manner, the light sources of the blocks which are not divisionally lit on.
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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |