IMAGING APPARATUS

• Main Authors: TAMAOKI NORIHIKO, MIYAKE YASUO, MURAKAMI MASAFUMI, SATO YOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 12.10.2017
• 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 an imaging apparatus capable of achieving a global shutter function while suppressing a complication in a circuit in a pixel.SOLUTION: An imaging apparatus in the present disclosure comprises: a plurality of unit pixel cells including a first electrode, a second electrode, a photoelectric conversion layer between the first electrode and a second electrode, a charge storage region connected to the first electrode, and a signal detection circuit connected to the charge storage region; and a voltage supply circuit that is connected to the second electrode, supplies a first voltage to the second electrode in an exposure period for storing an electric charge formed by photoelectric conversion to the charge storage region, and supplies a second voltage to the second electrode in a non-exposure period. A start and a finish of the exposure period are common in the plurality of unit pixel cells. Each unit pixel cell is connected to the charge storage region, and includes a reset transistor that switches a supply and a block of a reset voltage. A electric potential difference between the first electrode and the second electrode when the reset voltage is supplied is larger than that after the reset voltage is blocked.SELECTED DRAWING: Figure 1 【課題】画素内における回路の複雑化を抑制しながらもグローバルシャッタ機能を実現し得る撮像装置を提供する。【解決手段】本開示の撮像装置は、それぞれが、第１電極、第２電極、第１電極と第２電極との間の光電変換層、第１電極に接続された電荷蓄積領域、および電荷蓄積領域に接続された信号検出回路を含む複数の単位画素セルと、第２電極に接続され、光電変換により生成される電荷を電荷蓄積領域に蓄積するための露光期間において第１電圧を第２電極に供給し、非露光期間において第２電圧を第２電極に供給する電圧供給回路とを備え、露光期間の開始および終了は、複数の単位画素セル間で共通であり、各単位画素セルは、電荷蓄積領域に接続され、リセット電圧の供給および遮断を切り替えるリセットトランジスタを含み、リセット電圧が供給されたときの第１電極と第２電極との間の電位差は、リセット電圧が遮断された後よりも大きい。【選択図】図１