| 摘要 |
PROBLEM TO BE SOLVED: To provide an illuminance sensor capable of suppressing variation in sensitivity intensity and that in sensitivity wavelength. SOLUTION: This sensor includes a first photodetecting portion PD1 having a predetermined peak sensitivity wavelength and a second photodetecting portion PD2 having a longer peak sensitivity wavelength compared with the first photodetecting portion PD1. A connection point where the first photodetecting portion PD1 and the second photodetecting portion PD2 are connected in series is defined as an output terminal. Each of the first and second photodetecting portions PD1 and PD2 are divided into two or more pieces while having almost the same area, and they are connected in parallel. The divided first and second photodetecting portions PD1 and PD2 are so alternately arranged as to be equally distributed planarly in a photodetecting region S. A resin sealing portion 4 for sealing the first photodetecting portion and the second photodetecting portion is provided, and the resin sealing portion 4 is provided with a lens portion 41 converging light to the photodetecting region S, and further an upper surface of the lens portion 41 excepting the light incident surface is made to be a roughened surface. COPYRIGHT: (C)2009,JPO&INPIT |
