Samsung Electronics Co., Ltd.

Seok Jung Kim

Soo Han Park

Jung Gug Pae

Yong Han Yoon

Se June Park

An optical pickup device to provide a stable operation in both low-speed and high-speed modes by controlling a change in natural frequency, the optical pickup device including: a lens holder to support an objective lens; a supporting unit spaced apart from the lens holder; and a plurality of suspension members each having one end fixed to the lens holder and another end supported by the supporting unit to enable a movement of the lens holder, wherein the supporting unit includes a fixing member, a coupling portion provided in the fixing member to couple each suspension member, magnetic fluid received in the coupling portion, and an excite device to apply a magnetic field to the magnetic fluid.

Optical pickup device

An optical pickup device is provided with a plurality of object lens corresponding to various kinds of optical discs having different recording densities, in which the structure of the optical pickup device is simplified and the size of the optical pickup device is minimized. The optical pickup device comprises a bobbin including an upper surface, at which first and second object lenses are mounted, an opened lower surface, and a first and second side surfaces supported by a supporting unit, the first and second side surfaces being opposite to each other, a first focus coil and a first tracking coil mounted at a third side surface of the bobbin, a second focus coil and a second tracking coil mounted at a fourth side surface of the bobbin, which is opposite to the third side surface, and magnets disposed opposite to the first and second focus coils and the first and second tracking coils.

Growing community of inventors

Suwon-si, South Korea

Seok Jung Kim