JPH0159367U

JPH0159367U -

Info

Publication number: JPH0159367U
Application number: JP15570487U
Authority: JP
Priority date: 1987-10-12
Filing date: 1987-10-12
Publication date: 1989-04-13

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例によるＣＲＴの保
護回路の構成図、第２図は要部の構成図、第３図
は従来のＣＲＴの保護回路の構成図、第４図は動
作説明用の波形図である。１……水平出力回路、２……高圧発生回路、３
，５……ドライバ回路、４……水平発振回路、６
……倍電圧整流回路、７……プリドライバ回路、
９……整流回路、Ｔｒ１，Ｔｒ２，Ｔｒ３……ス
イツチング用トランジスタ、Ｃ１，Ｃ２……共振
コンデンサ、Ｄ１，Ｄ２……ダンパダイオード、
Ｌ１……偏向コイル、ＦＢＴ……フライバツクト
ランス、ＣＴ……チヨークトランス。なお、図中
、同一符号は同一または相当部分を示す。 Fig. 1 is a block diagram of a CRT protection circuit according to an embodiment of this invention, Fig. 2 is a block diagram of the main parts, Fig. 3 is a block diagram of a conventional CRT protection circuit, and Fig. 4 is for explanation of operation. FIG. 1...Horizontal output circuit, 2...High voltage generation circuit, 3
, 5...driver circuit, 4...horizontal oscillation circuit, 6
... Voltage doubler rectifier circuit, 7... Predriver circuit,
9... Rectifier circuit, Tr1, Tr2, Tr3... Switching transistor, C1, C2... Resonance capacitor, D1, D2... Damper diode,
L1...Deflection coil, FBT...Flyback transformer, CT...Choice transformer. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A horizontal output circuit consisting of a switching transistor, a deflection coil, a resonant capacitor, and a damper diode, a high voltage generation circuit consisting of a switching transistor, a resonant capacitor, a step-up flyback transformer, and a voltage doubler rectifier circuit, and a horizontal oscillation circuit. A protection circuit for a cathode ray tube comprising: a driver circuit that receives the output of the horizontal output circuit and drives the high voltage generating circuit, respectively; and a chiyoke transformer connected to the output stage of the horizontal output circuit. A protection circuit for a cathode ray tube, characterized in that a rectifier circuit serving as a power source for a driver circuit of a generating circuit is connected to the secondary side of the chiyoke transformer.