JPS643272U - - Google Patents
Info
- Publication number
- JPS643272U JPS643272U JP9502387U JP9502387U JPS643272U JP S643272 U JPS643272 U JP S643272U JP 9502387 U JP9502387 U JP 9502387U JP 9502387 U JP9502387 U JP 9502387U JP S643272 U JPS643272 U JP S643272U
- Authority
- JP
- Japan
- Prior art keywords
- crt
- switching element
- resistor
- turned
- utility
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Details Of Television Scanning (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
フライバツクトランスの２次出力電圧波形図であ
る。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a secondary output voltage waveform diagram of a flyback transformer.
Claims (1)
ヒータ端子との間に抵抗を接続し、該抵抗に並列
にスイツチング素子を接続し、該スイツチング素
子をオン・オフ制御するようにしたことを特徴と
するＣＲＴのヒータ電圧切替回路。 (2) 上記スイツチング素子を、上記フライバツ
クトランスの１次側に印加するフライバツクパル
スのパルス幅が相対的に狭いときオンさせるよう
にしたことを特徴とする実用新案登録請求の範囲
第１項記載のＣＲＴのヒータ電圧切替回路。[Claims for Utility Model Registration] (1) A resistor is connected between the secondary side of the flyback transformer and the heater terminal of the CRT, a switching element is connected in parallel to the resistor, and the switching element is turned on and off. A CRT heater voltage switching circuit characterized in that it is controlled. (2) Utility model registration claim 1, characterized in that the switching element is turned on when the pulse width of the flyback pulse applied to the primary side of the flyback transformer is relatively narrow. The heater voltage switching circuit of the described CRT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9502387U JPS643272U (en) | 1987-06-20 | 1987-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9502387U JPS643272U (en) | 1987-06-20 | 1987-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS643272U true JPS643272U (en) | 1989-01-10 |
Family
ID=31319636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9502387U Pending JPS643272U (en) | 1987-06-20 | 1987-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS643272U (en) |
-
1987
- 1987-06-20 JP JP9502387U patent/JPS643272U/ja active Pending