Optical finger navigation module for extreme temperature operation and method for increasing life time of OFN module

Optical finger navigation module for extreme temperature operation and method for increasing life time of OFN module

An optical finger navigation module includes a light source mounted below a window plate formed on a housing of the module, a driver for outputting a current to the light source, an environmental sensor for sensing an environmental condition and providing a signal, and a sensor integrated circuit in...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Tong Ka Lap, Hung Vincent Wai
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
PHYSICS
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:An optical finger navigation module includes a light source mounted below a window plate formed on a housing of the module, a driver for outputting a current to the light source, an environmental sensor for sensing an environmental condition and providing a signal, and a sensor integrated circuit including a processor coupled with the environmental sensor for reading the signal and generating a compensated current that corresponds to the signal based on a compensation curve tailor-made for the light source and derived from a compensation algorithm using compensation factors. A method for increasing lifetime of the module is also disclosed.