Patent ID: 9200952
Filing Date: 2015-12-01
Classification: G01J,H01L,H04N

Abstract:
1. A semiconductor device comprising: a photodetector circuit comprising a photoelectric conversion element; a switching circuit electrically connected to the photodetector circuit; and an analog arithmetic circuit electrically connected to the switching circuit, wherein the photodetector circuit and the switching circuit are discrete elements, wherein the photodetector circuit and the analog arithmetic circuit are discrete elements, wherein the photodetector circuit is configured to output a first optical data signal and a second optical data signal, wherein each value of the first optical data signal and the second optical data signal is determined in accordance with an illuminance of incident light to the photoelectric conversion element, wherein the first optical data signal and the second optical data signal are input to the analog arithmetic circuit, wherein the analog arithmetic circuit is configured to perform an arithmetic processing using the first optical data signal and the second optical data signal, wherein the switching circuit is configured to switch the arithmetic processing in the analog arithmetic circuit between an addition operation and a subtraction operation of the first optical data signal and the second optical data signal, wherein the switching circuit is configured to switch the arithmetic processing in the analog arithmetic circuit between the addition operation and the subtraction operation of the first optical data signal and the second optical data signal depending on illuminance of light entering the photoelectric conversion element, wherein the addition operation is performed in a case where the illuminance of light entering the photoelectric conversion element is larger than a reference value, and wherein the subtraction operation is performed in a case where the illuminance of light entering the photoelectric conversion element is smaller than the reference value.