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:
Jan. 29, 2002
Filed:
Mar. 20, 1998
Yasuyuki Todokoro, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image-forming apparatus includes an image-forming device in an envelope. The image-forming device includes a member (e.g. thin film electrode) which is carried on the inner surface of the envelope and is adapted to application of electron-accelerating voltage Va. The member-carrying part, such as a transparent face plate) of the envelope also includes on its outer surface a structure for applying a voltage substantially equal to the voltage Va (e.g. electroconductive layer connected to the thin-film electrode by way of a certain resistance). The electric field across the part is significantly reduced to thereby prevent migration of sodium ions contained in the part, which can be made of soda lime glass.