JPS572170A - Peripheral light depreciation compensation circuit for solid state pickup element - Google Patents
Peripheral light depreciation compensation circuit for solid state pickup elementInfo
- Publication number
- JPS572170A JPS572170A JP7581080A JP7581080A JPS572170A JP S572170 A JPS572170 A JP S572170A JP 7581080 A JP7581080 A JP 7581080A JP 7581080 A JP7581080 A JP 7581080A JP S572170 A JPS572170 A JP S572170A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- peripheral light
- circuit
- depreciation
- light
- 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.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 title abstract 5
- 239000007787 solid Substances 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
PURPOSE:To compensate peripheral light depreciation electrically and high-minutely through a simple constitution of circuit, by varying the reference level during an A/D conversion, consequently varying the quantizing step. CONSTITUTION:The input beams are condensed by an optical system 1 and then led into an electric charge coupling element 2, and both the light of a certain intensity and the depreciated light supplied from the peripheral part are applied to the element 2. The output given from the element 2 is amplified by an ampifier 3 and then quantized by an A/D converter 7. In this case, a driving timing pulse is applied to the element 2 from a timing generating circuit 5, and the timing pulse is applied to the converter 7. At the same time, the driving timing is counted by a control circuit 4. Then the control signal of a compensation value of peripheral light depreciation which is stored previously is applied to a D/A converter 6. Based on this control signal, the value of correction is supplied to the converter 7 from the converter 6. Then the reference level is varied when a D/A conversion is carried out by the converter 7. Thus the peripheral light depreciation is compensated with a high precision and through a simple constitution of circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7581080A JPS572170A (en) | 1980-06-05 | 1980-06-05 | Peripheral light depreciation compensation circuit for solid state pickup element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7581080A JPS572170A (en) | 1980-06-05 | 1980-06-05 | Peripheral light depreciation compensation circuit for solid state pickup element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS572170A true JPS572170A (en) | 1982-01-07 |
Family
ID=13586909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7581080A Pending JPS572170A (en) | 1980-06-05 | 1980-06-05 | Peripheral light depreciation compensation circuit for solid state pickup element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS572170A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002344811A (en) * | 2001-05-14 | 2002-11-29 | Olympus Optical Co Ltd | Solid-state imaging device |
| WO2006074847A1 (en) * | 2005-01-14 | 2006-07-20 | Robert Bosch Gmbh | Analog-digital converter |
-
1980
- 1980-06-05 JP JP7581080A patent/JPS572170A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002344811A (en) * | 2001-05-14 | 2002-11-29 | Olympus Optical Co Ltd | Solid-state imaging device |
| WO2006074847A1 (en) * | 2005-01-14 | 2006-07-20 | Robert Bosch Gmbh | Analog-digital converter |
| US8188900B2 (en) | 2005-01-14 | 2012-05-29 | Robert Bosch Gmbh | Analog-digital converter |
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