KR950009650A - Spindle motor malfunction prevention method for laser disc player and its device - Google Patents

Abstract

The present invention relates to an LDP. In particular, when an abnormality occurs in the frequency detection sensor unit or when the wire of the frequency detection sensor is shorted, the disk phenomenon and the damage of the device due to the runaway speed of the spindle motor are detected. The present invention relates to a method and a device for preventing a malfunction of a spindle motor of an LDP which attempts to solve the above problem by controlling a spindle motor according to the present invention, and an object of the present invention is an FG sensor for detecting a frequency for detecting a rotational speed of a disk. Current / voltage conversion means for converting the current output from the means into voltage, clock generation means for shaping and outputting the voltage output from the current / voltage conversion means into a clock, and a clock and a reference clock generated by the clock generation means. Clock comparing means for comparing and outputting the result, and the value output from the clock comparing means and the clock. The microcomputer controls the overall operation of the system by determining whether the clock is generated by receiving the clock output from the generating means and outputting the spindle motor driving control signal and the servo error detection signal, and the servo error according to the servo error detection signal output from the micom. And servo drive detection means for controlling the drive of the spindle motor in accordance with signals output from the microcomputer and servo error detection means, respectively.

Description

Spindle motor malfunction prevention method for laser disc player and its device

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

2 is a configuration diagram of a laser disc player system applied to the present invention;

3 is a signal flow chart for explaining a spindle motor malfunction prevention method of the laser disk player of the present invention.

Claims (2)

Searching for the presence or absence of an input of another frequency clock to the rotation of the spindle motor; and determining that the frequency detection sensor is abnormal when the frequency clock is not input, and stopping the drive of the spindle motor. And a step of controlling the spindle motor by the difference compared with a reference frequency clock of a preset spindle motor speed. Current / voltage conversion means for converting the current output from the FG sensor means for detecting the frequency for detecting the rotational speed of the disk into voltage, and clock for shaping and outputting the voltage output from the current / voltage conversion means as a clock. A generator, a clock comparing means for comparing the clock generated by the clock generating means with a reference clock and outputting a result value, a clock output from the clock comparing means and a clock output from the clock generating means A microcomputer for controlling the entire operation of the system by judging occurrence and outputting a spindle motor driving control signal and a servo error detection signal; servo error detecting means for detecting a servo error according to the servo error detection signal output from the microcomputer; Motor drive to control the drive of the spindle motor according to the signals output from the microcomputer and servo error detection means The spindle motor malfunction prevention apparatus of the laser disk player characterized by comprising a control means configured. ※ Note: It is to be disclosed based on the initial application.