Taiyo Yuden Assigned Patent

Taiyo Yuden Co., Ltd., Tokyo, Japan, has been assigned a patent (9,183,871) developed by Shimomai, Kenichi, and Imamura, Yutaka, Takasaki, Japan, for a “optical recording device, optical recording method and multi-layer disk.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”An optical recording device that records to a multi-layer disk having multiple recording layers includes a controller which sets a data area in which user data is recorded, and a calibration area including a main calibration area and at least one sub-calibration area which are used to calibrate the intensity of laser light for recording, with the same layout among the plurality of recording layers, conducts first calibration for performing initial recording in the data area by using the main calibration area, records dummy data in the remainder of the main calibration area, and conducts second calibration for performing additional recording in the data area by using the sub-calibration area.“

The patent application was filed on March 27, 2013 (14/400,199).