JPS6437174A - Image pickup device - Google Patents
Image pickup deviceInfo
- Publication number
- JPS6437174A JPS6437174A JP62193180A JP19318087A JPS6437174A JP S6437174 A JPS6437174 A JP S6437174A JP 62193180 A JP62193180 A JP 62193180A JP 19318087 A JP19318087 A JP 19318087A JP S6437174 A JPS6437174 A JP S6437174A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- image pickup
- comparator
- saturating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE:To properly adjust exposure at all time by fixing the signal level part between the back porch part and the front porch part of a video signal at a prescribed level at a time when an output signal is in a saturating level. CONSTITUTION:When the charges generated in respective picture elements of an image pickup element 24 come in saturating state due to the enhancement in the quantity of light, the state is detected by a lower limit peak holding circuit 33 and a comparator 32. By an output from the comparator 32, a switch circuit 31 is switched. Accordingly, a clamping circuit 26 fixes the signal part between the back porch part and the front porch part of a video signal at a prescribed level.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193180A JPH0759051B2 (en) | 1987-07-31 | 1987-07-31 | Imaging device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193180A JPH0759051B2 (en) | 1987-07-31 | 1987-07-31 | Imaging device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6437174A true JPS6437174A (en) | 1989-02-07 |
JPH0759051B2 JPH0759051B2 (en) | 1995-06-21 |
Family
ID=16303634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62193180A Expired - Fee Related JPH0759051B2 (en) | 1987-07-31 | 1987-07-31 | Imaging device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0759051B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04236581A (en) * | 1991-01-18 | 1992-08-25 | Fuji Photo Film Co Ltd | Black level correcting circuit for video signal |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5710583A (en) * | 1980-06-23 | 1982-01-20 | Nec Corp | Automatic diaphragm control method of solidstate image pickup device |
-
1987
- 1987-07-31 JP JP62193180A patent/JPH0759051B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5710583A (en) * | 1980-06-23 | 1982-01-20 | Nec Corp | Automatic diaphragm control method of solidstate image pickup device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04236581A (en) * | 1991-01-18 | 1992-08-25 | Fuji Photo Film Co Ltd | Black level correcting circuit for video signal |
Also Published As
Publication number | Publication date |
---|---|
JPH0759051B2 (en) | 1995-06-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |