Patent ID: 6855935

Claim:
An electromagnetic wave detector comprising: conversion elements for converting incident electromagnetic waves or radiations into an electric charge; storage capacitors for storing the electric charge produced by said conversion elements; thin film read transistors connected respectively to the corresponding storage capacitors, each of said read transistors having a threshold voltage and a gate to which first and second voltages are applied respectively in readout and storage periods, wherein said first voltage is higher than said threshold voltage of said read transistor; and thin film reset transistors connected respectively to the corresponding storage capacitors, each of said reset transistors having a threshold voltage and a gate to which third and fourth voltages are applied respectively in reset and storage periods wherein said third voltage is higher than said threshold voltage of said reset transistor, and wherein a gate potential of said read transistors and a gate potential of said reset transistors can be independently controlled, and the difference between the fourth voltage and the threshold voltage of said reset transistors is smaller than the difference between the second voltage and the threshold voltage of said read transistors.