Apparatus and method for servo balance calibration in optical disc driver
A technology of balance calibration and optical drive, applied in the direction of head configuration/installation, etc., can solve problems such as poor efficiency and complex methods
Inactive Publication Date: 2009-10-21
MEDIATEK INC
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Problems solved by technology
Traditional tracking balance calibration (tracking balance calibration) is often used in the above-mentioned servo balance calibration method, but the traditional method is quite complicated and inefficient
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[0014] Please refer to figure 1 , Is a schematic diagram of adjusting the servo balance calibration parameters of the optical drive in a preferred embodiment of the present invention. The servo balance calibration device 100 of the present invention is used in an optical drive to perform servo balance calibration in a simple and efficient manner. The optical read-write unit (OPU) 102 of the optical drive emits light beam S e To the optical disc 104 and detect the reflected beam S from the optical disc 104 r To generate a set of detection signals S d . In a preferred embodiment of the present invention, the process of performing servo balance calibration with the servo balance calibration device 100 is, for example, performing tracking balance calibration to perform servo control of the optical drive.
[0015] The servo balance calibration device 100 mainly includes an amplifying unit 106, a servo signal generator 108, a control unit 110, and a balance calibration unit 112. The am...
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The invention discloses a servo balance calibrating device and calibration method of an optical drive, which is used for adjusting the servo balance gain of the optical drive. The optical reading and writing unit of the optical drive sends a light beam to the optical disc and detects the reflected light beam to generate a set of detection signals. The servo balance calibration device includes an amplification unit, a servo signal generator, a control unit and a balance calibration unit. The amplifying unit amplifies the group of detection signals according to the amplification gain to form a first group of amplified signals. The servo signal generator has the servo balance gain, and generates the first servo signal according to the first set of amplified signals. The control unit controls one of the optical read-write unit and the amplification unit to generate a second set of amplified signals. The balance calibration unit calculates the first servo signal and the second servo signal from the second set of amplified signals to adjust the servo balance gain of the first servo signal and the second servo signal.
Description
【Technical Field】 [0001] The invention relates to a servo balance calibration device and a calibration method of an optical drive, and more particularly to a tracking balance calibration device and a calibration method of the optical drive. 【Background technique】 [0002] When the optical drive reads data from the optical disc or writes data to the optical disc, the optical pick-up unit (OPU) of the optical drive should continuously detect the reflected signal from the optical disc as a servo control. , So that the optical read-write unit can correctly access the data on the disc. The optical read / write unit includes a photodiode that detects the reflected beam. When the beam focus area of the reflected beam on the photodiode cannot be balanced, that is to say, the beam focus area is not at the center of the photodiode or is detected When the beam focus area cannot be balanced and focused, the servo control of the optical read / write unit cannot be executed correctly. Servo bala...
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IPC IPC(8): G11B7/09
Inventor 赵志谋黄英峰
Owner MEDIATEK INC