Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-01-03
2006-01-03
Le, Que T. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S201500
Reexamination Certificate
active
06982405
ABSTRACT:
A system and method for using a photodiode to self-test an optical drive is disclosed. An optical drive includes a light source that emits a light for interacting with optical media. A photodiode placed adjacent the light source detects a portion of the light, such that the photodiode generates an electrical signal proportional to the light that is detected. A circuit is electrically coupled to the photodiode. The circuit receives the electrical signal and, based on the electrical signal, the circuit tests the operability of the optical drive.
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Erickson Dirk A.
Farhan Munif M.
Baker & Botts L.L.P.
Dell Products L.P.
Le Que T.
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