Dynamic optical information storage or retrieval – Dynamic mechanism optical subsystem – Protecting optical transducer
Reexamination Certificate
2005-03-22
2005-03-22
Chen, Tianjie (Department: 2652)
Dynamic optical information storage or retrieval
Dynamic mechanism optical subsystem
Protecting optical transducer
Reexamination Certificate
active
06871351
ABSTRACT:
In a disc driving apparatus, wherein a laser diode and a laser driver circuit board are mounted on a pickup housing in thermal contact therewith and are disposed adjacent to each other, a heat separation member is provided between the laser diode and the laser driver circuit board for effecting thermal separation therebetween, thereby reducing the thermal interference between the heat-generating elements that are adjacent to each other in the optical pickup. This makes it possible to protect the heat-generating elements from being deteriorated, leading to a reduction in the lifetime thereof, as well as, to improve the reliability thereof.
REFERENCES:
patent: 5581523 (1996-12-01), Seki et al.
patent: 6430143 (2002-08-01), Kajiyama et al.
Kato Seiichi
Kimura Katsuhiko
Ochi Manabu
Satake Mitsuo
Yamauchi Yoshiaki
Antonelli Terry Stout & Kraus LLP
Chen Tianjie
Hitachi , Ltd.
Hitachi Media Electronics Co. Ltd.
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