Optical disc apparatus, a method of performing an optical power study of an optical disc apparatus, and a method of detecting a writing power of an optical disc apparatus

A method of performing an optical power study of an optical disc apparatus comprising an optical pickup, including a light source to emit a laser beam to write and/or read data onto and/or from an optical disc and an actuator to drive a lens to form a beam spot on the optical disc, and a servo to control operations of the optical pickup, the method comprising:

• moving the optical pickup to a location corresponding to specific area of the optical disc;
• applying an optical power signal to the light source to emit a laser beam toward the specific area of the optical disc;
• splitting the laser beam into a first part directed to the optical disc and a second part directed to an optical power detector;
• and
• determining optical power characteristics of the light source after moving the optical pickup to the location and before writing and reading data onto the optical disc using the optical power signal and a detected optical power of the second part of the emitted laser beam, wherein the optical power study is performed while maintaining the actuator in a driving state.

A method of performing an optical power study of an optical disc apparatus comprising an optical pickup, including a light source to emit a laser beam to write and/or read data onto and/or from an optical disc and an actuator to drive a lens to form a beam spot on the optical disc, and a servo to control operations of the optical pickup, the method comprising:

• seeking a test area of an optical disc where test data is to be written to detect an optimal writing power for writing data on the optical disc;
• applying an optical power signal to the light source to emit a laser beam to be split into a first part directed to a found test area of the optical disc and a second part directed to an optical power detector, and determining optical power characteristics of the light source using the optical power signal and an optical power of the second part of the emitted laser beam;
• and
• performing optimal calibration (OPC) to detect an optimal writing power of the optical pickup, comprising:
• writing test data;
• and
• reading the written test data and detecting the optimal writing power based on quality of the read signal.

A method of performing an optical power study of an optical disc apparatus comprising an optical pickup, including a light source to emit a laser beam to write and/or read data onto and/or from an optical disc and an actuator to drive a lens to form a beam spot on the optical disc, and a servo to control operations of the optical pickup, the method comprising:

• moving the optical pickup to a location corresponding to specific area of the optical disc;
• applying an optical power signal to the light source to emit the laser beam toward the specific area of the optical disc;
• splitting the laser beam into a first part directed to the optical disc and a second part directed to an optical power detector;
• and
• determining optical power characteristics of the light source after moving the optical pickup to the location and before writing and reading test data onto the optical disc using the optical power signal and a detected optical power of the second part of the emitted laser beam with the actuator maintained in a driving state.

A method of performing an optical power study of an optical disc apparatus comprising an optical pickup, including a light source to emit a laser beam to write and/or read data onto and/or from an optical disc and an actuator to drive a lens to form a beam spot on the optical disc, and a servo to control operations of the optical pickup, the method comprising:

• seeking a test area of an optical disc where test data is to be written;
• applying an optical power signal to the light source to emit a laser beam to the found test area;
• splitting the laser beam into a first part directed to the optical disc and a second part directed to an optical power detector;
• determining optical power characteristics of the light source using the optical power signal and a detected optical power of the second part of the emitted laser beam;
• and
• performing optimal calibration (OPC) to detect an optimal writing power of the optical pickup, comprising:
• writing the test data;
• reading the test data and detecting the optimal writing power based on a quality of the read signal;
• and
• adjusting the optical power signal to the light source based on the optical power characteristics of the light source and the quality of the read signal.