Patent ID: 7974161
Filing Date: 2011-07-05
Classification: G11B

Abstract:
1. A method of adjusting gain balance of an optical transducer in an optical drive, the method comprising the steps of: (a) predetermining two external gains; (b) adjusting the projection position of a reflection spot toward one side of the optical transducer, and respectively measuring the current output values of the optical transducer each corresponding to one of the external gains; (c) adjusting the projection position of the reflection spot toward the other side of the optical transducer, and respectively measuring the current output values of the optical transducer each corresponding to one of the external gains; (d) calculating a gain balance value of the optical transducer and setting the gain balance value as the external gain; (e) adjusting the projection position of the reflection spot which is projected on the optical transducer; (f) locking the projection position of the reflection spot when the current output value of the optical transducer is equal to 0; and (g) ending adjustment.