Optical disc apparatus, method of controlling the same, and information storage medium

A method of controlling an optical disc apparatus comprising:

• an optical pickup for outputting an output signal according to information recorded on an optical disc medium;
• and a servo implementation unit for controlling a relative position of the optical pickup with respect to a surface of the optical disc medium according to the output signal of the optical pickup to implement servo control for maintaining a state where the information is readable from the optical disc medium, the method comprising:
• an evaluation value acquisition step of acquiring an evaluation value for information reading accuracy of the optical pickup when the servo control is implemented;
• and
• a parameter adjustment step of calculating a set value of a predetermined parameter to be set for the implementation of the servo control based on the evaluation value acquired in the evaluation value acquisition step for each of at least three set values of the predetermined parameter while changing the set value of the predetermined parameter,
• wherein the parameter adjustment step comprises determining the set value to be set for further acquiring the evaluation value according to the evaluation values acquired for at least two set values of the predetermined parameter.

A computer readable information storage medium storing a program for controlling an optical disc apparatus comprising:

• an optical pickup for outputting an output signal according to information recorded on an optical disc medium;
• and a servo implementation unit for controlling a relative position of the optical pickup with respect to a surface of the optical disc medium according to the output signal of the optical pickup to implement servo control for maintaining a state where the information is readable from the optical disc medium, the program controlling a computer to function as:
• evaluation value acquisition means for acquiring an evaluation value for information reading accuracy of the optical pickup when the servo control is implemented;
• and
• parameter adjustment means for calculating a set value of a predetermined parameter to be set for the implementation of the servo control based on the evaluation value acquired by the evaluation value acquisition means for each of at least three set values of the predetermined parameter while changing the set value of the predetermined parameter,
• wherein the parameter adjustment means determines the set value to be set for further acquiring the evaluation value according to the evaluation values acquired for at least two set values of the predetermined parameter.

An optical disc apparatus for reading information recorded on an optical disc medium, comprising:

• an optical pickup for outputting an output signal according to the information recorded on the optical disc medium;
• a servo implementation unit for controlling a relative position of the optical pickup with respect to a surface of the optical disc medium according to the output signal of the optical pickup to implement servo control for maintaining a state where the information is readable from the optical disc medium;
• and
• parameter adjustment means for changing a value of each of a plurality of parameters set for the servo control to a given target value when the servo control is implemented,
• wherein the parameter adjustment means performs the change of the value of at least one of the plurality of parameters to the target value a plurality of times, and changes another parameter between the plurality of times of changing the at least one parameter.

A method of controlling an optical disc apparatus comprising:

• an optical pickup for outputting an output signal according to information recorded on an optical disc medium;
• and a servo implementation unit for controlling a relative position of the optical pickup with respect to a surface of the optical disc medium according to the output signal of the optical pickup to implement servo control for maintaining a state where the information is readable from the optical disc medium,
• the method comprising changing a value of each of a plurality of parameters set for the servo control to a given target value during the implementation of the servo control,
• wherein the changing comprises performing the change of the value of at least one of the plurality of parameters to the target value a plurality of times, and changing another parameter between the plurality of times of changing the at least one parameter.