PHOTOELECTRIC CONVERSION DEVICE AND IMAGING SYSTEM

• Main Author: TASHIRO KAZUAKI
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide a photoelectric conversion device capable of suppressing reduction in a dynamic range of a detectable optical signal.SOLUTION: The photoelectric conversion device comprises a plurality of pixels 100 each including: a photoelectric conversion part 101 including a first electrode 201, a second electrode 209, a photoelectric conversion layer 205 arranged between the first electrode and the second electrode, and an insulation layer 207 arranged between the photoelectric conversion layer and the second electrode; an amplification part 104 which is electrically connected with the second electrode and outputs a signal generated in the photoelectric conversion part; and a reset part 102 for supplying a reset voltage to the second electrode. In accordance with a voltage between the first electrode and a second electrode, a storage operation for storing a signal charge in the photoelectric conversion part and a discharge operation for discharging the signal charge stored by the storage operation from the photoelectric conversion part are alternately performed. During at least a partial period in a horizontal scan period for successively reading signals out of a column circuit, the reset part supplies the reset voltage to the second electrode.SELECTED DRAWING: Figure 1 【課題】検出できる光信号のダイナミックレンジの低下を抑制しうる光電変換装置を提供する。【解決手段】第１の電極２０１、第２の電極２０９、第１の電極と第２の電極との間に配された光電変換層２０５、光電変換層と第２の電極の間に配された絶縁層２０７、を含む光電変換部１０１と、第２の電極と電気的に接続され、光電変換部で生じた信号を出力する増幅部１０４と、第２の電極にリセット電圧を供給するリセット部１０２と、を有する複数の画素１００を備える。第１の電極と第２の電極との間の電圧に応じて、光電変換部に信号電荷を蓄積する蓄積動作と、蓄積動作によって蓄積された信号電荷を光電変換部から排出する排出動作とを交互に行い、列回路から順に信号を読み出す水平走査期間の間の少なくとも一部の期間に、リセット部がリセット電圧を第２の電極に供給する。【選択図】図１