JPS57154976A - Blanking device - Google Patents
Blanking deviceInfo
- Publication number
- JPS57154976A JPS57154976A JP56041208A JP4120881A JPS57154976A JP S57154976 A JPS57154976 A JP S57154976A JP 56041208 A JP56041208 A JP 56041208A JP 4120881 A JP4120881 A JP 4120881A JP S57154976 A JPS57154976 A JP S57154976A
- Authority
- JP
- Japan
- Prior art keywords
- period
- current
- video signal
- blanking period
- flows
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Color Television Image Signal Generators (AREA)
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To avoid a shift of the white balance, by preventing the occurrence of an error of the DC potential between the blanking period of a video signal and the period of other signals. CONSTITUTION:During the blanking period, an emitter current IE of a transistor TR3 flows through a TR31 in the form of a constant current I42. The current IE flows through a TR32 in the form of a constant current I43 during the video signal period excepting the blanking period. Then both the constant current circuits 37 and 38 are set so as to satisfy I42=I43 in both the blanking period and other video signal period. As a result, the emitter current IE flows with a constant level in both the blanking period and other video signal period. Thus no change occurs to the current IE to avoid a shift of the white balance with a picture image.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56041208A JPS57154976A (en) | 1981-03-19 | 1981-03-19 | Blanking device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56041208A JPS57154976A (en) | 1981-03-19 | 1981-03-19 | Blanking device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57154976A true JPS57154976A (en) | 1982-09-24 |
JPS6218111B2 JPS6218111B2 (en) | 1987-04-21 |
Family
ID=12601984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56041208A Granted JPS57154976A (en) | 1981-03-19 | 1981-03-19 | Blanking device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57154976A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62116082A (en) * | 1985-11-15 | 1987-05-27 | Sony Corp | Blanking circuit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63197438A (en) * | 1987-02-10 | 1988-08-16 | 横河メディカルシステム株式会社 | Tgc curve setting circuit of ultrasonic diagnostic apparatus |
-
1981
- 1981-03-19 JP JP56041208A patent/JPS57154976A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62116082A (en) * | 1985-11-15 | 1987-05-27 | Sony Corp | Blanking circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6218111B2 (en) | 1987-04-21 |
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