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US 2006/0077796 A1Published application
Focus controlling device and method, and focus control program
AssigneeClarion Co., Ltd.
InventorsHirofumi Yajima, Manabu Gocho
Life of this patent
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AssigneeClarion Co., Ltd.
InventorsHirofumi Yajima, Manabu Gocho
Estimating the term…
An optical pickup 4 that converts the reflected light from a laser light irradiated onto a disc into an electrical signal, is provided with an objective lens 42 that performs the irradiation of the laser light and reception of the reflected light and a biaxial actuator 43 that drives the objective lens 42. There are provided a focusing error signal detection unit 52 that detects the drive signal of the actuator using the electrical signal from the optical pickup 4, an actuator drive unit 56 that controls drive of the biaxial actuator 43 such that the objective lens 42 performs a focus pull-in action, using the drive signal, a focus gain setting section that sets the focus gain of the drive signal and a focus gain adjustment unit 54 that clips a drive signal waveform.
A focus control device comprising:
A method of focus control wherein an optical pickup irradiates laser light onto an optical recording medium through an optical member and converts the reflected light into an electrical signal, a drive signal is detected using the electrical signal from said optical pickup, and said optical member performs a focus pull-in action using said drive signal, characterized in that:
A focus control program that causes a computer to implement a function whereby an optical pickup irradiates laser light onto an optical recording medium through an optical member and converts the reflected light into an electrical signal, a function whereby a drive signal is detected using the electrical signal from said optical pickup, and a function whereby said optical member performs a focus pull-in action using said drive signal, characterized in that:
In a focus control device for an optical pickup device that optically retrieves data from an optical recording medium, the optical pickup device being focused on the optical recording medium by a drive signal, the improvement comprising;
Dependencies are inferred from the claim text.