X-ray protector

Abstract

The object of the present invention is to provide an X-ray protector that requires no raising a voltage to be impressed to a Braun tube and no complicated control procedure for testing at the time of conducting a test of an X-ray protector's operation. The voltage impressed to the Braun tube 8 of a TV receiver is detected by the detection winding 6c of the flyback transformer 6 and the detection circuit 11, and the input line 15, which conducts the operation of the X-ray protector by inputting a signal based on the detected voltage to the microcomputer 1, is provided with the resistor R1. And, whether the transistor 12 is conductive or unconductive depends on the control by the microcomputer 1. An emitter terminal of the transistor 12 is connected to one terminal of the resistor R1, and a collector terminal is connected to the other terminal of the resistor R1. The transistor 12 becomes conductive by controlling a signal output from the microcomputer 1, and the both ends of the resistor R1 are short-circuited. At that time, the electric voltage of a signal input to the input port 1c of the microcomputer 1 is raised, thereby enabling the testing of the operation of the X-ray protector. Therefore, at the time of conducting the test of the operation of the X-ray protector, there is no need to apply an excessive voltage higher than that of normal operation to a Braun tube, so that an emission of X-rays exceeding a permissible dose will not occur and the Braun tube suffers no damage.

Dependencies are inferred from the claim text.