Optical disc system and method for managing shock during data record/play

An optical disc system comprising:

• an optical pick-up unit for applying a laser beam to a track of an optical disc and detecting reflected light;
• a servo unit for controlling tracking and focus of the optical pick-up unit;
• a monitoring unit for comparing a monitoring signal, which is output from the optical pick-up unit and the servo unit, with a reference signal and generating a blocking signal and a blocking release signal;
• a microprocessor for outputting an optical power control signal for controlling an optical power of a laser diode of the optical pick-up unit in response to the blocking signal and the blocking release signal;
• and
• an optical power controller which changes the optical power of the laser diode in response to the optical power control signal,
• wherein recording or playing of data on the optical disc is stopped in response to the blocking signal and recording or playing of the data on the optical disc is resumed in response to the blocking release signal.

A method of managing shock which is applied to an optical disc system, the method comprising:

• (a) setting a monitoring signal and setting a level of a reference signal according to the set monitoring signal;
• (b) determining whether shock is applied by comparing the monitoring signal with the level of the reference signal;
• (c) generating a blocking signal if it is determined that shock is applied;
• (d) stopping recording or playing of data on the optical disc in response to the blocking signal and storing information representing the state of the optical disc system when the recording or playing is stopped;
• (e) determining whether shock is removed by comparing the monitoring signal with the level of the reference signal;
• (f) loading the stored information on the state of the optical disc system if it is determined that shock is removed;
• and
• (g) resuming recording or playing of data on the optical disc by using the loaded information on the state of the optical disc system.