Title:
DRIVING METHOD FOR OPTICAL SHUTTER
Document Type and Number:
Japanese Patent JPS6450017
Kind Code:
A
Abstract:
PURPOSE:To increase contrast and to eliminate an irregularity in image density by driving an optical shutter so that the intensity of transmitted light from the optical shutter becomes stable. CONSTITUTION:When the optical shutter 1 is driven, the optical shutter 1 is applied with a half-wavelength DC voltage or pulse voltage Vlambda/2 as a stabilizing voltage V1 to stabilize the transmitted light intensity of the optical shutter 1. Then a fluorescent lamp 11 is turned on by a controller 18 and a driving circuit 14 applies a half-wavelength pulse voltage Vlambda/2 to the optical shutter 1 as a driving voltage V2 to drive the optical shutter 1. Consequently, the contrast is improved and the image density irregularity is eliminated without decreasing a system speed.
Inventors:
MATSUBARA KEN
SAITO ITARU
ARAGAKI KOICHI
KITANO HIROHISA
MASUDA TOMOHIKO
SAITO ITARU
ARAGAKI KOICHI
KITANO HIROHISA
MASUDA TOMOHIKO
Application Number:
JP20767287A
Publication Date:
February 27, 1989
Filing Date:
August 20, 1987
Export Citation:
Assignee:
MINOLTA CAMERA KK
International Classes:
G02F1/055; B41J2/44; B41J2/445; (IPC1-7): G02F1/055
Domestic Patent References:
| JPS59113414A | 1984-06-30 | |||
| JPS5893030A | 1983-06-02 | |||
| JPS593416A | 1984-01-10 | |||
| JPS6154965A | 1986-03-19 |
Attorney, Agent or Firm:
Matsukawa Katsuaki