PHOTOELECTRIC CONVERSION DEVICE

To provide a photoelectric conversion device that reduces the possibility of omission of detection of an event.SOLUTION: A photoelectric conversion device has a plurality of pixels each including a photoelectric conversion part generating electric charges according to incident light, an electric charge holding part, a first transfer transistor transferring the electric charges from the photoelectric conversion part to the electric charge holding part, a second transfer transistor transferring the electric charges from the electric charge holding part to a first node, and a third transfer transistor transferring the electric charges from the photoelectric conversion part to a second node. In one of the plurality of pixels, first read-out processing in which a gradation signal indicating a quantity of the incident light is read out based on the electric charges transferred to the first node, and second read-out processing in which an event signal indicating a change in a quantity of the incident light is read out based on the electric charges transferred to the second node, are performed in parallel.SELECTED DRAWING: Figure 2 【課題】イベントの検出漏れの可能性が低減された光電変換装置を提供すること。【解決手段】入射光に応じた電荷を生成する光電変換部と、電荷保持部と、前記光電変換部から前記電荷保持部に電荷を転送する第１転送トランジスタと、前記電荷保持部から第１ノードに電荷を転送する第２転送トランジスタと、前記光電変換部から第２ノードに電荷を転送する第３転送トランジスタと、を各々が含む複数の画素を有し、前記複数の画素のうちの１つにおいて、前記第１ノードに転送された電荷に基づいて前記入射光の光量を示す階調信号が読み出される第１読み出し処理と、前記第２ノードに転送された電荷に基づいて前記入射光の光量の変化を示すイベント信号が読み出される第２読み出し処理と、が並行して行われる。【選択図】図２