Abstract: An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly and a stopping assembly. The fixed assembly has a main axis. The movable assembly is configured to connect an optical element, and the movable assembly is movable relative to the fixed assembly. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The stopping assembly is configured to limit the movement of the movable assembly relative to the fixed assembly within a range of motion.

Abstract: A power controlling method for eliminating output power offset of a pick-up head in an optical disc drive. The power control method includes measuring a first predetermined power related to a first predetermined control signal in a predetermined procedure, inputting a test data containing a plurality of first bits and a plurality of second bits, activating a sample/hold circuit to form a close loop so that the first predetermined control signal can be received and utilized for driving a pick-up head to output a first power when the plurality of first bits are received, and calculating an offset power based on the first predetermined power and the first power for rectifying output power of the pick-up head.

Abstract: A method, an optical disk drive and a calibration system for modifying a 2T write strategy to improve recording quality. The method includes driving the optical disk drive for burning a test odd mark and a test even mark on an optical disk, detecting signal waveforms associated with the test odd mark and the test even mark, adjusting a plurality of writing periods used for forming an even mark according to the signal waveform of the test even mark, and adjusting a plurality of writing periods used for forming an odd mark according to the signal waveform of the test odd mark without utilizing the adjusted writing periods for the even mark.

Abstract: A power controlling method for eliminating output power offset of a pick-up head in an optical disc drive. The power control method includes measuring a first predetermined power related to a first predetermined control signal in a predetermined procedure, inputting a test data containing a plurality of first bits and a plurality of second bits, activating a sample/hold circuit to form a close loop so that the first predetermined control signal can be received and utilized for driving a pick-up head to output a first power when the plurality of first bits are received, and calculating an offset power based on the first predetermined power and the first power for rectifying output power of the pick-up head.

Abstract: A method, an optical disk drive and a calibration system for modifying a 2T write strategy to improve recording quality. The method includes driving the optical disk drive for burning a test odd mark and a test even mark on an optical disk, detecting signal waveforms associated with the test odd mark and the test even mark, adjusting a plurality of writing periods used for forming an even mark according to the signal waveform of the test even mark, and adjusting a plurality of writing periods used for forming an odd mark according to the signal waveform of the test odd mark without utilizing the adjusted writing periods for the even mark.

Abstract: An optical disk drive has a pick-up head for generating a laser beam to record data on an optical disk and for detecting corresponding power of the laser beam, and a power control unit for adjusting power of the laser beam generated by the pick-up head. The power control method includes inputting a plurality of first control signals into the power control unit in order so that the power control unit generates a plurality of first control voltages related to the first control signals for sequentially driving the pick-up head to output a plurality of first test powers, and using the plurality of first test powers and the plurality of first control signals to establish a first mapping function. The optical disk drive uses the first mapping function to get a first predetermined output power and a corresponding first predetermined control signal according to the first mapping function.