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:
Jun. 21, 2011
Filed:
Aug. 24, 2009
Cheng Chieh Huang, Taipei, TW;
Jinn-ann Kuo, Taipei County, TW;
Cheng Chieh Huang, Taipei, TW;
Jinn-Ann Kuo, Taipei County, TW;
Capella Microsystems (Taiwan), Ltd., Sindian, TW;
Abstract
The present invention discloses a photosensitive circuit comprising a photosensitivity unit, a capacitance and a switch unit. The photosensitivity unit is capable of receiving a received light, and the capacitance is capable of storing a photoelectric current corresponding to the received light. The switch unit is used to respectively provide the positive voltage of the capacitance to a comparison unit at a first time period, and the negative voltage of the capacitance to a comparison unit at a second time period. The comparison unit outputs a detection value according to the positive voltage and the negative voltage of the capacitance, the detection value is related to the distance between an object and the photosensitive circuit. The present invention further disclose a photosensitive chip to drive a luminescent unit to provide a detective light. The photosensitive chip comprises a sampling clock generator, the ambient light sensor unit, a proximity sensor unit and a driving clock generator.