KR970056809A - TV's Horizontal Output Driving Return Circuit - Google Patents

Abstract

The present invention is a horizontal output transistor of a television which is able to automatically return to the original operating state when the horizontal output drive circuit is reduced to a normal operating environment after the drive is temporarily stopped due to overcurrent due to a layer short or the like. A protection circuit, comprising: a horizontal output control unit for outputting predetermined oscillation pulses for horizontal output and vertical output of a CRT based on a synchronization signal separately detected from a broadcast signal; and a horizontal drive oscillation pulse output from the horizontal output control unit. A horizontal driver driven on / off, a flyback transformer applying a high voltage to the anode electrode of the CRT according to the on / off operation of the horizontal driver, and detecting an electric current flowing through the horizontal driver to detect an overcurrent at a first level. An overcurrent detector for outputting a signal, the overcurrent detection output from the overcurrent detector A horizontal oscillation pulse intermitter for controlling the output of the horizontal drive oscillation pulse of the horizontal output controller based on a call; and automatically detecting the level of the overcurrent detection signal when the level of the overcurrent detection signal is reduced to a second level. It characterized in that it comprises a return circuit for returning the operation to the original state,

Description

TV's Horizontal Output Driving Return Circuit

Since this is an open matter, no full text was included.

2 is a circuit diagram showing a horizontal output driving return circuit of a television according to an embodiment of the present invention.

Claims (2)

A horizontal output control unit for outputting predetermined oscillation pulses for the horizontal output and the vertical output of the CRT based on the synchronization signal detected separately from the broadcast signal, and horizontally driven on / off according to the horizontal drive oscillation pulses output from the horizontal output control unit The driving unit, a flyback transformer for applying a high voltage to any anode electrode of the CRT according to the on / off operation of the horizontal driver, and an overcurrent for detecting an electric current flowing through the horizontal driver and outputting an overcurrent detection signal of a first level when an overcurrent flows. A detection unit, a horizontal oscillation pulse intermitter for controlling the output of the horizontal drive oscillation pulse of the horizontal output control unit based on the overcurrent detection signal output from the overcurrent detection unit, and when the level of the overcurrent detection signal is reduced to a second level Automatically detect and return the operation of the horizontal oscillation pulse interruption unit to its original state That is configured to return to the horizontal output driving circuit of the television according to claim including a circuit ear. The switching circuit of claim 1, wherein the return circuit comprises: a first switching transistor configured to adjust a potential level of a feedback terminal applied to the horizontal output controller by being turned on and off according to a level of a high current detection signal output from the overcurrent detector; A horizontal output drive return circuit comprising a resistor and a capacitor for stabilizing an operating point of a switching transistor. ※ Note: The disclosure is based on the initial application.