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. 16, 1983
Filed:
May. 29, 1981
Hiroshi Hamada, Nara-shi, Nara-ken, JP;
Kohzo Yano, Yamatokoriyama, JP;
Katubumi Koyanagi, Nara, JP;
Hiroshi Take, Ikoma, JP;
Yasuhiko Inami, Nara, JP;
Other;
Abstract
An electrochromic display device comprises a plurality of display segmented electrodes and first additional electrodes, a layer of an electrochromic material in contact with each of the display segmented electrodes and the first additional electrodes, a first connecting circuit for selectively connecting each of the display segmented electrodes into one of two groups, depending on a display pattern to be indicated, a counting circuit for counting the electrodes and determining the difference in display area between the two groups of display segmented electrodes, a circuit responsive to the difference in display area for connecting each of the first additional electrodes into one of the two groups of the display segmented electrodes, a power supply for supplying power to each of the two groups of the first additional electrodes and the display segmented electrodes, and a second additional electrode for keeping the total amount of charge for coloring all the display electrodes constant.