Extended dynamic range drive circuit for emitter arrays,申请号IL20140233106-传众专利搜索

Extended dynamic range drive circuit for emitter arrays

申请公布号：IL233106(A)

申请号：IL20140233106

申请日期：2014.06.12

申请公布日期：2016.02.29

申请人：

SANTA BARBARA INFRARED INC.;JOSEPH DONALD LAVEIGNE;FOUAD KIAMILEV;RODNEY MCGEE;NICHOLAS WAITE

发明人：JOSEPH DONALD LAVEIGNE;FOUAD KIAMILEV;RODNEY MCGEE;NICHOLAS WAITE

分类号：H05B

主分类号：H05B

摘要：Drive circuit (100, 200, 300, 400) for LED thermal emitters in pixel elements of an infrared scene projector (IRSP). At least two current sources (Q1, Q2, Q5) provide output currents (I1,I2,I3) which may be summed and provided to a single LED (150), or provided independently to two or more LEDs (450A, 450B). The current sources may have different gains (G1, G2, G3), and different turn-on voltages (Voffset). This allows for different resolutions for different ranges of apparent temperatures, such as high resolution in a low range and low resolution in a high range, thereby facilitating a digital implementation of the drive circuit(s).