Patent ID: 7092323

Claim:
A focus control system for an optical pickup head, comprising: a focusing error signal generator electrically connected to said optical pickup head for generating a focusing error signal in response to an electronic signal from said optical pickup head; a focus control signal generator electrically connected to said focusing error signal generator, and including a first, a second and a third compensators with a first, a second and a third gains, respectively, for generating a focus control signal with one of said first, second and third gains in response to said focusing error signal according to a corresponding one of a first, a second and a third operating modes of said optical pickup head; and an actuator moving said optical pickup head in response to said focus control signal; wherein said second compensator is selected to output said focus control signal with said second gain in said second operating mode when said optical pickup head completes a focusing operation and is situated in a seeking condition, and said second gain is larger than said first gain.