JPS5560392A - External light color temperature corrector for color television camera - Google Patents
External light color temperature corrector for color television cameraInfo
- Publication number
- JPS5560392A JPS5560392A JP13267078A JP13267078A JPS5560392A JP S5560392 A JPS5560392 A JP S5560392A JP 13267078 A JP13267078 A JP 13267078A JP 13267078 A JP13267078 A JP 13267078A JP S5560392 A JPS5560392 A JP S5560392A
- Authority
- JP
- Japan
- Prior art keywords
- color
- outputs
- photo detectors
- external light
- television camera
- 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
Landscapes
- Processing Of Color Television Signals (AREA)
- Color Television Image Signal Generators (AREA)
Abstract
PURPOSE: To perform automatically color-temperature compensation for external light by feeding the output of a relational amplifier, which compares outputs of photo detectors and then outputs a variation signal of a color temperature, back to the color signal output of a corresponding color television.
CONSTITUTION: Several photo detectors 10 are arranged near pickup lens 1 and on front surfaces of respective photo detectors 10, color filters 11 corresponding to R, G and B are arranged to detect quantities of respective components of ambient light 2a of a camera. Outputs of photo detectors 10 are inputted to relational amplifier 12, which outputs ratios of R/G and B/G by processing inputs. Those outputs are fed back to color signal outputs of corresponding pickup tubes 4 and 6, so that color reproducibility of variation in color temperature of ambient light will be compensated automatically.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13267078A JPS5560392A (en) | 1978-10-30 | 1978-10-30 | External light color temperature corrector for color television camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13267078A JPS5560392A (en) | 1978-10-30 | 1978-10-30 | External light color temperature corrector for color television camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5560392A true JPS5560392A (en) | 1980-05-07 |
Family
ID=15086744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13267078A Pending JPS5560392A (en) | 1978-10-30 | 1978-10-30 | External light color temperature corrector for color television camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5560392A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0731607A1 (en) * | 1995-03-10 | 1996-09-11 | Alcatel SEL Aktiengesellschaft | Circuit for displaying and controlling the ratios of ambient light |
-
1978
- 1978-10-30 JP JP13267078A patent/JPS5560392A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0731607A1 (en) * | 1995-03-10 | 1996-09-11 | Alcatel SEL Aktiengesellschaft | Circuit for displaying and controlling the ratios of ambient light |
US5734439A (en) * | 1995-03-10 | 1998-03-31 | Alcatel N.V. | Circuit arrangement for indicating ambient light conditions of a video pickup and video display device |
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