The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1989
Filed:
Oct. 14, 1987
Hirohisa Kitano, Takatsuki, JP;
Itaru Saito, Itami, JP;
Kouichi Shingaki, Takatsuki, JP;
Ken Matsubara, Takatsuki, JP;
Tomohiko Masuda, Amagasaki, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An electro-optical light shutter device for use in electrophotographic printers or the like including an elongated plate having an electro-optical effect, a polarizer and an analyzer disposed on the light incident and emergent side of the plate, respectively. The plate is formed with a first groove extending longitudinally thereof, a second groove parallel to the first groove with a predetermined distance having a smaller depth than the first groove and a plurality of third grooves extending in a direction across the first and second grooves having a smaller depth than the first groove but a larger depth than the second groove, and provided with a plurality of projections aligned longitudinally thereof which are divided by the forming of the first, second and third grooves. A common electrode for the plurality of projections in common and individual electrodes corresponding to the respective projections individually are respectively provided in the first and second groove and connected to a drive circuit for selectively applying an electric field to the projections.