The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 2010
Filed:
Jun. 13, 2007
Yi-yang Chang, Taichung, TW;
Yi-Yang Chang, Taichung, TW;
Asia Optical Co., Inc., Taichung, TW;
Abstract
A light detecting circuit includes a power source circuit, an optoelectronic component, a switch and a Trans Impedance Amplifier (TIA) circuit. The power source circuit provides an electric signal. When the optoelectronic component is biased at a bias voltage, the optoelectronic component generates a corresponding current according to the received light density. The switch has a trigger receiver. After the trigger receiver receives a trigger signal, the switch turns on and the optoelectronic component is biased at the bias voltage. The TIA circuit transforms the corresponding current to a corresponding voltage and then calculates the corresponding voltage to obtain the light density.