Player with two read heads for double-sided optical discs

Details Player with two read heads for double-sided optical discs Player with two read heads for double-sided optical discs

2006-12-19

2006-12-19

Tran, Thang V. (Department: 2627)

Dynamic information storage or retrieval

Systems having plural physically distinct independent tracks...

Having layered storage medium

C720S670000

Reexamination Certificate

active

07151734

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.

REFERENCES:
patent: 3999009 (1976-12-01), Bouwhuis
patent: 4729938 (1988-03-01), Tajima et al.
patent: 4807204 (1989-02-01), Mizutani et al.
patent: 4890273 (1989-12-01), Takeuchi et al.
patent: 5235575 (1993-08-01), Han
patent: 5253242 (1993-10-01), Satoh et al.
patent: 5255260 (1993-10-01), Yamada et al.
patent: 5406534 (1995-04-01), Hisakado et al.
patent: 5418774 (1995-05-01), O'Hara et al.
patent: 5470627 (1995-11-01), Lee et al.
patent: 5485452 (1996-01-01), Maeda
patent: 5518325 (1996-05-01), Kahle
patent: 5533001 (1996-07-01), Watanabe et al.
patent: 5563855 (1996-10-01), Nakase et al.
patent: 5606546 (1997-02-01), Best et al.
patent: 5608717 (1997-03-01), Ito et al.
patent: 5608718 (1997-03-01), Schiewe
patent: 5648954 (1997-07-01), Satoh
patent: 5696743 (1997-12-01), Kawasaki
patent: 5703868 (1997-12-01), Kobayashi et al.
patent: 5706269 (1998-01-01), Ogura et al.
patent: 5729525 (1998-03-01), Ishida et al.
patent: 5761160 (1998-06-01), Sanada
patent: 5796688 (1998-08-01), Gage et al.
patent: 5905707 (1999-05-01), Ju et al.
patent: 5949752 (1999-09-01), Glynn et al.
patent: RE36445 (1999-12-01), Miyagawa et al.
patent: 6014364 (2000-01-01), Takasu et al.
patent: 6172957 (2001-01-01), Ogasawara
patent: 6576319 (2003-06-01), Yoshinari et al.
patent: 6603714 (2003-08-01), Winter
patent: 09147362 (1997-06-01), None

Affiliated with

Also associated with

Rating

Player with two read heads for double-sided optical discs does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Player with two read heads for double-sided optical discs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Player with two read heads for double-sided optical discs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3678643