Title:
【発明の名称】光電変換装置の駆動方法
Document Type and Number:
Japanese Patent JP2810525
Kind Code:
B2
Abstract:
PURPOSE:To reduce the after image of a photoelectric converter by changing the inter-terminal voltage of a photodiode during the duration period of a reset pulse signal for resetting a storage charge inputted to a switching element. CONSTITUTION:When resetting the storage charge, the inter-terminal voltage of the photodiode is set (a reset A) by a pulse width shorter than a reset pulse width so as to impress a reverse bias bigger than storage initial voltage, next the photodiode is set (a reset B) at a storage initial voltage V0. That is, at the reset A, a depletion layer is widened until the position of the depletion layer end, and at the reset B, an effective electric field exists even at the position of the depletion layer end. Therefore, the trapped electric charge in the vicinity of the depletion layer end is emitted quickly. Thus, the after image is reduced drastically.
Inventors:
Yoshiyuki Nagata
Application Number:
JP29885790A
Publication Date:
October 15, 1998
Filing Date:
November 06, 1990
Export Citation:
Assignee:
Canon Inc
International Classes:
G01J1/44; H04N5/33; H04N5/335; H04N5/353; H04N5/361; H04N5/369; H04N5/374; (IPC1-7): H04N5/335
Domestic Patent References:
| JP2265362A | ||||
| JP2229469A |
Attorney, Agent or Firm:
Yamashita