Image-forming apparatus, and designation of electron beam diameter at image-forming member in image-forming apparatus
CA 2112432 C · Owner: Canon Kabushiki Kaisha · Inventors: Nomura, Ichiro; Nakamura, Naoto; Sato, Yasue
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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An image-forming apparatus is comprised of substrate, an electron-emitting device which is provided on the substrate, has an electron-emitting region between electrodes, and emits electrons on application of voltage between the electrodes and an, image-forming member which forms an image on irradiation of an electron beam, wherein the diameter S1 of the electron beam on the image-forming member in direction of application of the voltage between the electrodes is given by Equation (I):, S1 = K1~2d(V f/V a) 1/2 (I) where K1 is a constant and 0.8 ~ K1 ~ 1.0 d is a, distance between the substrate and the image-forming member, V f is a voltage applied between the electrodes and V a is a voltage …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 24, 1993 and granted May 4, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2015.
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