JPS60119165U - Electronic view finder for TV camera - Google Patents
Electronic view finder for TV cameraInfo
- Publication number
- JPS60119165U JPS60119165U JP526384U JP526384U JPS60119165U JP S60119165 U JPS60119165 U JP S60119165U JP 526384 U JP526384 U JP 526384U JP 526384 U JP526384 U JP 526384U JP S60119165 U JPS60119165 U JP S60119165U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- ray tube
- cathode ray
- cathode
- approximates
- 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
- Details Of Television Scanning (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の回路図、第２図はアノード電流−（明る
さ）−フォーカス電圧の一般的特性図、第３図は本考案
の一実施例を示す回路図そある。 。
−３＝偏向回路、４：高圧発生回路、５ニブラウン管、
８：フォーカス調整器、９：ビーム電流制限抵抗、１０
：フォーカス電圧分圧抵抗、１１：フォーカス電圧補償
用トランジスタ、１３：カソード電流検出抵抗。FIG. 1 is a conventional circuit diagram, FIG. 2 is a general characteristic diagram of anode current-(brightness)-focus voltage, and FIG. 3 is a circuit diagram showing an embodiment of the present invention. . -3=deflection circuit, 4: high pressure generation circuit, 5 Ni cathode ray tube,
8: Focus adjuster, 9: Beam current limiting resistor, 10
: Focus voltage dividing resistor, 11: Focus voltage compensation transistor, 13: Cathode current detection resistor.
Claims (1)
管上に撮像画像を表示するテレビジョンカメラのビュー
ファインダにおいて、ブラウン管のアノード電流をカソ
ード電流を検出することにより近似検出する回路と、該
検出したカソード電流によりブラウン管のフォーカス電
極電圧を変化させ最適フォーカス電圧となるよう近似補
償する回路とにより、コントラスト、輝度を変化させた
場合においても、良好なフォーカスの画像を表示するよ
うにしたことを特徴とするテレビカメラ用電子ビューフ
ァインダ。In a view finder of a television camera that has a deflection circuit, an image amplification circuit, and a high voltage generation circuit and displays a captured image on a cathode ray tube, there is provided a circuit that approximates the anode current of the cathode ray tube by detecting the cathode current, and a circuit that approximates the anode current of the cathode ray tube by detecting the cathode current. The feature is that an image with good focus is displayed even when the contrast and brightness are changed by using a circuit that approximates compensation by changing the focus electrode voltage of the cathode ray tube using a cathode current and achieving the optimum focus voltage. Electronic viewfinder for TV cameras.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP526384U JPS60119165U (en) | 1984-01-20 | 1984-01-20 | Electronic view finder for TV camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP526384U JPS60119165U (en) | 1984-01-20 | 1984-01-20 | Electronic view finder for TV camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60119165U true JPS60119165U (en) | 1985-08-12 |
Family
ID=30481605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP526384U Pending JPS60119165U (en) | 1984-01-20 | 1984-01-20 | Electronic view finder for TV camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60119165U (en) |
-
1984
- 1984-01-20 JP JP526384U patent/JPS60119165U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS645569U (en) | ||
| JPS60119165U (en) | Electronic view finder for TV camera | |
| JPH0616443B2 (en) | Focusing unit | |
| JPS5810365U (en) | decoupled cathode ray tube | |
| KR960004977Y1 (en) | Dynamic focus output circuit | |
| JPS58123675U (en) | Blanking circuit that also serves as a spot killer | |
| JPS60172476U (en) | image display device | |
| JPS58158562U (en) | deflection circuit | |
| JPH0357680U (en) | ||
| JPS5919499Y2 (en) | CRT display device | |
| JPS5965461U (en) | deflection yoke | |
| JPS5848172U (en) | tv jiyoung camera | |
| JPS581956Y2 (en) | electron gun | |
| JPS5952550U (en) | Projection type television receiver | |
| JPH07114453B2 (en) | Flat cathode ray tube | |
| JPS5866778U (en) | picture tube drive circuit | |
| JPS60116288A (en) | Video camera | |
| JPS59248U (en) | Image tube | |
| JPH0548972A (en) | X-ray television system | |
| JPS5928950U (en) | Color picture tube touch detection device | |
| JPS58129774U (en) | Image tube device | |
| JPS58158572U (en) | television receiver | |
| JPS5864181U (en) | Stereoscopic imaging device | |
| JPS5961677U (en) | Projection type television receiver | |
| JPS61179874U (en) |