US5309227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video signal processing system for electronic endoscope
Assignee: Fujinon Corp
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Filing: 1993-06-08
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Granted: 1994-05-03
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Expires: 2013-06-08
Abstract
Abstract A video signal processing system for electronic endoscope, employing a high-sensitivity solid-state image sensor device having an approximately doubled sensitivity along with improved dynamic range and RGB spectral sensitivity ratios and reduced to about 1/2 in size as compared with conventional endoscopic solid-state image sensor devices, the system being arranged to read out therefrom an A-field signal having a preceding line added to each scanning line and a B-field signal having a succeeding line added to each scanning line, store the A- and B-field signals in a field memory, and read out the A- and B-field signals alternately line by line from the field memory as picture data to improve the RGB spectral sensitivity ratios.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A video signal processing system for an electronic endoscope, comprising: a solid-state image sensor device; a video processor for reading out signal charges from said solid-state image sensor device under sequential RGB illuminations; a field memory means for storing output data of said video processor; control means for reading out from said solid-state image sensor device an A-field signal having a preceding line added to each scanning line and a B-field signal having a succeeding line added to said each scanning line, for storing the A-field and B-field signals in said field memory means, and for reading out the A-field and B-field signals alternately line by line from said field memory means as picture data; and display means for displaying said picture data.
Claim 2
Dependent Claim
123 words
A video signal processing system for an electronic endoscope, comprising: a solid-state image sensor device; a video processor for reading out signal charges from said solid-state image sensor device under sequential RGB illuminations; a field memory means for storing output data of said video processor; control means for reading out from said solid-state image sensor device an A-field signal having a preceding line added to each scanning line and a B-field signal having a succeeding line added to said each scanning line, for storing the A-field and B-field signals in said field memory means, and for reading out the A-field and B-field signals alternately line by line from said field memory means as picture data; and display means for displaying said picture data.
Claim 3
Dependent Claim
29 words
A video signal processing system as defined in claim 1, wherein said sequential RGB illuminations are repeated consecutively a couple of times in obtaining one frame of picture data.
Claim 4
Dependent Claim
165 words
A video signal processing system for an endoscope, comprising: a control means compatible with both: a first system employing a single solid-state image sensor device for producing picture data on the basis of one of two different field signals obtained from picture data of each primary color; and a second system employing a high-sensitivity solid-state image sensor device having a half number of picture elements as compared with said single solid-state image sensor device of said first system and, said second system comprising first reading means for reading out from said high-sensitivity solid-state image sensor an A-field signal having a preceding line added to each scanning line and a B-field signal having a succeeding line added to said each scanning line, storing means for storing said A-field and B-field signals in a field memory means, and second reading means for reading out said A-field and B-field signals alternatively line by line from said field memory means as picture data to be displayed on a monitor.
Claim 5
Dependent Claim
165 words
A video signal processing system for an endoscope, comprising: a control means compatible with both: a first system employing a single solid-state image sensor device for producing picture data on the basis of one of two different field signals obtained from picture data of each primary color; and a second system employing a high-sensitivity solid-state image sensor device having a half number of picture elements as compared with said single solid-state image sensor device of said first system and, said second system comprising first reading means for reading out from said high-sensitivity solid-state image sensor an A-field signal having a preceding line added to each scanning line and a B-field signal having a succeeding line added to said each scanning line, storing means for storing said A-field and B-field signals in a field memory means, and second reading means for reading out said A-field and B-field signals alternatively line by line from said field memory means as picture data to be displayed on a monitor.
Claim 6
Dependent Claim
50 words
A video signal processing system as defined in claim 3, further comprising a circuitry arranged to use an A/D converter, a field memory means, D/A converters, a color encoder and master clock circuit commonly for processing video signals from said solid-state image sensor devices of said first and second systems.
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) | 1997-05-02 | 1997-11-01 | 1998-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-02 | 2001-11-01 | 2002-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-02 | 2005-11-01 | 2006-05-03 | $7700.00 | Window Closed / Lapsed |