| Title of Invention | OPTICAL DISC DRIVE APPARATUS |
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| Abstract | In an optical disc drive apparatus (1) capable of writing information to a recordable optical disc (2), a control circuit (10) for controlling an optical pickup unit (5) comprises: a controllable DC controller (22) adapted to give a DC offset to an analog data signal (RF); a variable gain amplifier (23) for amplifying the DC-shifted analog data signal (RFS); an AD-converter (24) for receiving the amplified analog signal (RFA); a digital calculating block (25) for receiving the digital output signal (RFD) 10 from the AD-converter (24) and digitally calculating at least one parameter (&bgr;, m) indicative of write operation quality; a processor (26) for receiving said at least one quality indicating parameter (&bgr;, m) and calculating a suitable power setting for the laser source of the optical pickup (5) on the basis of said at least one quality indicating parameter (&bgr;, m). |
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3313-CHENP-2005 CORRESPONDENCE OTHERS.pdf
3313-CHENP-2005 CORRESPONDENCE PO.pdf
3313-CHENP-2005 DESCRIPTION (COMPLETE).pdf
3313-CHENP-2005 POWER OF ATTORNEY.pdf
| Patent Number | 222362 | ||||||||
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| Indian Patent Application Number | 3313/CHENP/2005 | ||||||||
| PG Journal Number | 47/2008 | ||||||||
| Publication Date | 21-Nov-2008 | ||||||||
| Grant Date | 05-Aug-2008 | ||||||||
| Date of Filing | 08-Dec-2005 | ||||||||
| Name of Patentee | KONINKLIJKE PHILIPS ELECTRONICS N.V | ||||||||
| Applicant Address | Groenewoudseweg 1, NL-5621 BA Eindhoven, | ||||||||
Inventors:
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| PCT International Classification Number | G 11B 20/13 | ||||||||
| PCT International Application Number | PCT/IB2004/050808 | ||||||||
| PCT International Filing date | 2004-05-28 | ||||||||
PCT Conventions:
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