Patent ID: 7440361
Filing Date: 2008-10-21
Classification: G11B

Abstract:
1. An optical pickup unit to be used in an optical pickup apparatus, the optical pickup unit comprising: a light source mounted on a bobbin, to emit a light beam; an objective lens secured in a lens holder and mounted on the bobbin, to focus the light beam emitted from the light source on a recording surface of an optical recording medium; and a heat sink plate mounted on the bobbin over the light source and adjacent to the objective lens, and disposed between the light source and the optical recording medium in a focusing direction, to dissipate heat generated at least from the light source; wherein the heat sink plate is provided on an uppermost surface of the bobbin, adjacent to the lens holder, and closest to the optical recording medium, so that the heat generated from the light source and transferred to the heat sink plate is dissipated by an air flow generated during rotation of the optical recording medium.