JPH0244471U - - Google Patents
Info
- Publication number
- JPH0244471U JPH0244471U JP12291088U JP12291088U JPH0244471U JP H0244471 U JPH0244471 U JP H0244471U JP 12291088 U JP12291088 U JP 12291088U JP 12291088 U JP12291088 U JP 12291088U JP H0244471 U JPH0244471 U JP H0244471U
- Authority
- JP
- Japan
- Prior art keywords
- focus
- ripple waveform
- scanning period
- voltage
- parabolic wave
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Details Of Television Scanning (AREA)
Description
第1図は本考案一実施例の概略構成図、第2図
は従来回路の概略構成図、第3図は第2図の動作
を説明するための図である。
1……水平偏向回路、2′,2……ダイナミツ
クフオーカス回路、21……積分回路(リツプル
波形形成手段)、22……増幅回路、3……陰極
線管、A……アノード電極、F……フオーカス電
極、FBT……フライバツクトランス、Q2……
トランジスタ(フオーカス電圧制御手段)、C2
……コンデンサ。
FIG. 1 is a schematic block diagram of an embodiment of the present invention, FIG. 2 is a schematic block diagram of a conventional circuit, and FIG. 3 is a diagram for explaining the operation of FIG. 2. 1... Horizontal deflection circuit, 2', 2... Dynamic focus circuit, 21... Integrating circuit (ripple waveform forming means), 22... Amplifying circuit, 3... Cathode ray tube, A... Anode electrode, F ...Focus electrode, FBT...Flyback transformer, Q2 ...
Transistor (focus voltage control means), C 2
...Capacitor.
Claims (1)
られた直流電圧に、垂直走査周期のパラボラ波と
水平走査周期のパラボラ波とを入力とするフオー
カス電圧制御手段から出力されるダイナミツクフ
オーカスの変調電圧を、コンデンサを介して合成
し、その合成した電圧が陰極線管のフオーカス電
極に印加されるダイナミツクフオーカス回路にお
いて、 アノード電圧に発生するリツプル波形と相似な
リツプル波形の信号を映像信号に基づいて形成す
るリツプル波形形成手段を具備し、該リツプル波
形形成手段から出力されるリツプル波形の信号は
垂直、水平走査周期のパラボラ波と共に前記フオ
ーカス電圧制御手段に入力されることを特徴とす
るダイナミツクフオーカス回路。[Scope of Claim for Utility Model Registration] Focus voltage control means that inputs a parabolic wave in a vertical scanning period and a parabolic wave in a horizontal scanning period to a DC voltage obtained by dividing a high voltage for an anode electrode of a cathode ray tube. In a dynamic focus circuit, the output dynamic focus modulation voltages are combined via a capacitor and the combined voltage is applied to the focus electrode of the cathode ray tube. A ripple waveform forming means is provided for forming a ripple waveform signal based on a video signal, and the ripple waveform signal outputted from the ripple waveform forming means is inputted to the focus voltage control means together with a parabolic wave having a vertical and horizontal scanning period. A dynamic focus circuit characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12291088U JPH0516769Y2 (en) | 1988-09-20 | 1988-09-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12291088U JPH0516769Y2 (en) | 1988-09-20 | 1988-09-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0244471U true JPH0244471U (en) | 1990-03-27 |
JPH0516769Y2 JPH0516769Y2 (en) | 1993-05-06 |
Family
ID=31371285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12291088U Expired - Lifetime JPH0516769Y2 (en) | 1988-09-20 | 1988-09-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0516769Y2 (en) |
-
1988
- 1988-09-20 JP JP12291088U patent/JPH0516769Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0516769Y2 (en) | 1993-05-06 |
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