Patent ID: 7701821
Filing Date: 2010-04-20
Classification: G11B

Abstract:
1. An optical disk recording/reproducing apparatus, for recording data through irradiation of a laser beam of a predetermined power onto a optical disk, defining test writing areas on an inner periphery side and an outer periphery side and an area recordable with data between those inner periphery side and outer periphery side, or reproducing data recorded thereon from a reflection light thereupon, comprising: a pickup comprising a light source for radiating a laser beam to be irradiated upon said optical disk; a driver circuit for controlling a laser power irradiated by said light source of said pickup; and a controller for controlling operation of said apparatus, wherein said controller executes a test writing process, with selecting a test writing area on a periphery side being large in a ratio of difference, upon basis of ratio of the differences between powers on an inner periphery of said disk, which is set up at present, and control data on the inner periphery, which is recorded on said optical disk loaded therein, and upon basis of ratio of the difference between powers on an outer periphery, which is set up at present, and control data on the outer periphery, which is recorded on said optical disk loaded therein, when executing said test writing process for determining the predetermined laser power of said laser beam during executing a recording process within said apparatus.