US Patent 7151734 Player with two read heads for double-sided optical discs

Patent 7151734 was granted and assigned to Warner Bros. on December, 2006 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Warner Bros.

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7151734

Date of Patent

December 19, 2006

Patent Application Number

10716109

Date Filed

November 18, 2003

Patent Primary Examiner

‌

Thang V. Tran

Patent abstract

A double-sided optical disc, such as a DVD-18 disc, is formed with data tracks on each layer. The tracks on one side are oriented along one spiral while the tracks on the other side are oriented along a second spiral, the two spirals being oriented in opposite directions as viewed from the respective sides. A player with two laser read heads is provided for reading the disc. Each laser read head is disposed adjacent to a respective disc side. The data is read from the two sides, either in sequence from one side and then the other, simultaneously, or in some alternating fashion.