Title:
HIGH VOLTAGE OUTPUT STOPPING CIRCUIT
Document Type and Number:
Japanese Patent JP3313181
Kind Code:
B2
Abstract:
PURPOSE: To prevent the damage of the phosphor of a CRT by stopping the operation of a high voltage generating circuit when the deflection currents of a deflection amplifier are not generated in a CRT display device.
CONSTITUTION: In the deflection amplifier in which a horizontal deflection circuit A is operated independently of a high voltage generating circuit C, a horizontal deflection transformer 7 is equipped with a tertiary coil 7c, and the output voltage is rectified, and applied to a reference voltage generating circuit B. When a fault occurs at the horizontal deflection circuit A, and the output is decreased, a comparator circuit 11 applies a control signal to a high voltage generating part 12, and the generation of the high voltage is stopped. When the horizontal deflection circuit A is normally operated, the high voltage generating circuit C supplies the stable high voltage to a CRT 13.
Inventors:
Hiroshi Kamei
Application Number:
JP9200293A
Publication Date:
August 12, 2002
Filing Date:
March 26, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H04N3/185; H04N3/20; (IPC1-7): H04N3/185; H04N3/20
Domestic Patent References:
| JP2305274A | ||||
| JP1173975A | ||||
| JP4138773A | ||||
| JP446774U |
Attorney, Agent or Firm:
Yoshiki Okamoto
Previous Patent: REAL-IMAGE TYPE FINDER OPTICAL SYSTEM
Next Patent: PRODUCTION OF ANHYDROUS CRYSTAL MALTOSE
Next Patent: PRODUCTION OF ANHYDROUS CRYSTAL MALTOSE