JPS5599883A - Television camera unit - Google Patents
Television camera unitInfo
- Publication number
- JPS5599883A JPS5599883A JP775679A JP775679A JPS5599883A JP S5599883 A JPS5599883 A JP S5599883A JP 775679 A JP775679 A JP 775679A JP 775679 A JP775679 A JP 775679A JP S5599883 A JPS5599883 A JP S5599883A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- parabola
- picture
- fed
- circuit
- 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
- Picture Signal Circuits (AREA)
Abstract
PURPOSE: To obtain the picture which has uniform brightness without luminance unevenness over the entire screen, by feeding the parabola voltage changed in response to the illuminance change of object to the cathode of pick up tube.
CONSTITUTION: The unit consists of the circuit of horizontal deflection coils 4 and 5 attached with the integration circuits 7, 8, 9, 10. At the point A, the vertical deflection voltage is fed, this voltage V is integrated twice at the integration circuits 9, 10 to obtain the vertical parabola voltage Vp. Further, horizontal deflection voltage H is fed to the point B, and horizontal parabola voltage Hp is obtained by integrating twice the voltage H at the integration circuits 7, 8. The vertical and horizontal parabola voltages Vp, Hp are synthesized with the synthesis circuit 11 to form the correction voltage Vc, which is fed to the cathode of the vidicon 6. Further, the circuit 11 is controlled with the illuminance change detection circuit 12 to change so that the amplitudes a, b of the voltage Vc are greater when higher illuminance and smaller when it is lower. Thus, shading can be prevented and the level unevenness at the center of picture and circumference can be avoided to obtain the picture of uniform brightness.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP775679A JPS5599883A (en) | 1979-01-25 | 1979-01-25 | Television camera unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP775679A JPS5599883A (en) | 1979-01-25 | 1979-01-25 | Television camera unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5599883A true JPS5599883A (en) | 1980-07-30 |
Family
ID=11674532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP775679A Pending JPS5599883A (en) | 1979-01-25 | 1979-01-25 | Television camera unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5599883A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59189378U (en) * | 1983-06-01 | 1984-12-15 | 日立電子株式会社 | tv jiyoung camera |
| JPS60248092A (en) * | 1984-05-23 | 1985-12-07 | Sony Corp | Special effect generator |
| JPH03222586A (en) * | 1990-01-29 | 1991-10-01 | Aiwa Co Ltd | Shading correction device for surrounding luminous quantity for video camera |
-
1979
- 1979-01-25 JP JP775679A patent/JPS5599883A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59189378U (en) * | 1983-06-01 | 1984-12-15 | 日立電子株式会社 | tv jiyoung camera |
| JPS60248092A (en) * | 1984-05-23 | 1985-12-07 | Sony Corp | Special effect generator |
| JPH03222586A (en) * | 1990-01-29 | 1991-10-01 | Aiwa Co Ltd | Shading correction device for surrounding luminous quantity for video camera |
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