专利检索 ap:("Paul H. Dietz" OR "William S. Yerazunis" OR "Joshua N. Midgal") AND inv:"Joshua N. Midgal" 第 1 页

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发明授权
LED with controlled capacitive discharge for photo sensing 有权
标题翻译：具有受控电容放电的LED用于感光

公开(公告)号：US06870148B2

公开(公告)日：2005-03-22

申请号：US10453097

申请日：2003-06-03

申请人： Paul H. Dietz , William S. Yerazunis , Joshua N. Midgal

发明人： Paul H. Dietz , William S. Yerazunis , Joshua N. Midgal

IPC分类号： G01J1/44 , G01J1/32

CPC分类号： G01J1/44

摘要： A method and apparatus determining an intensity of light flux. First, a photodiode or LED is charged by reverse-biasing to a fixed voltage. The fixed voltage is a sum of a threshold voltage and a predetermined offset voltage. Then, a time to discharge the photodiode to the threshold voltage by a photo current is measured to determine an intensity of light producing the photocurrent.

摘要翻译： 确定光通量强度的方法和装置。首先，通过对固定电压进行反向偏置来对光电二极管或LED进行充电。固定电压是阈值电压和预定偏移电压之和。然后，测量通过光电流将光电二极管放电到阈值电压的时间，以确定产生光电流的光的强度。