JPH0298558U - - Google Patents
Info
- Publication number
- JPH0298558U JPH0298558U JP542089U JP542089U JPH0298558U JP H0298558 U JPH0298558 U JP H0298558U JP 542089 U JP542089 U JP 542089U JP 542089 U JP542089 U JP 542089U JP H0298558 U JPH0298558 U JP H0298558U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- correction signal
- voltage
- synchronization pulse
- waveform synthesis
- 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
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000003786 synthesis reaction Methods 0.000 claims 2
- 239000002131 composite material Substances 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Details Of Television Scanning (AREA)
Description
第１図は本考案によるダイナミツクフオーカス
回路の一実施例を示すブロツク図、第２図は第１
図の回路の動作を説明するための波形図、第３図
は従来のダイナミツクフオーカス回路のブロツク
図、第４図は従来の回路の動作を説明するための
波形図、第５図は陰極線管のフオーカストラツキ
ング特性を示す特性図である。
１……水平同期パルス発生回路、２……水平パ
ラボラ電圧発生回路、３……加算回路、４……垂
直同期パルス発生回路、５……垂直パラボラ電圧
発生回路、６……補正信号送出部、７……映像回
路、８……波形整形回路、９……増幅回路、１０
……結合コンデンサ、１１……直流高電圧源、１
２……出力端子。
FIG. 1 is a block diagram showing an embodiment of the dynamic focus circuit according to the present invention, and FIG.
Figure 3 is a block diagram of a conventional dynamic focus circuit; Figure 4 is a waveform diagram to explain the operation of a conventional circuit; Figure 5 is a cathode ray diagram. FIG. 3 is a characteristic diagram showing focus tracking characteristics of a tube. DESCRIPTION OF SYMBOLS 1...Horizontal synchronization pulse generation circuit, 2...Horizontal parabolic voltage generation circuit, 3...Addition circuit, 4...Vertical synchronization pulse generation circuit, 5...Vertical parabola voltage generation circuit, 6...Correction signal sending section, 7... Video circuit, 8... Waveform shaping circuit, 9... Amplification circuit, 10
...Coupling capacitor, 11...DC high voltage source, 1
2...Output terminal.
Claims (1)
する補正信号送出回路と、この補正信号送出回路
から出力される補正信号電圧を水平同期パルスお
よび垂直同期パルスに同期したパラボラ電圧に合
成する波形合成回路とを有し、この波形合成回路
から出力される合成電圧を直流高電圧に重畳して
陰極線管のフオーカス電極に印加することを特徴
とするダイナミツクフオーカス回路。 A correction signal sending circuit that sends out a correction signal according to the brightness level of the video signal, and a waveform synthesis circuit that synthesizes the correction signal voltage output from the correction signal sending circuit into a parabolic voltage synchronized with the horizontal synchronization pulse and the vertical synchronization pulse. What is claimed is: 1. A dynamic focus circuit comprising: a composite voltage outputted from the waveform synthesis circuit, superimposed on a high DC voltage and applied to a focus electrode of a cathode ray tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP542089U JPH0298558U (en) | 1989-01-23 | 1989-01-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP542089U JPH0298558U (en) | 1989-01-23 | 1989-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0298558U true JPH0298558U (en) | 1990-08-06 |
Family
ID=31208783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP542089U Pending JPH0298558U (en) | 1989-01-23 | 1989-01-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0298558U (en) |
-
1989
- 1989-01-23 JP JP542089U patent/JPH0298558U/ja active Pending
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