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. 15, 2008
Filed:
Aug. 27, 2003
Yoshiro Mikami, Hitachiota, JP;
Hiroki Kaneko, Hitachi, JP;
Yasuhiro Mochizuki, Hitachinaka, JP;
Katsumi Kondo, Mito, JP;
Yoshiro Mikami, Hitachiota, JP;
Hiroki Kaneko, Hitachi, JP;
Yasuhiro Mochizuki, Hitachinaka, JP;
Katsumi Kondo, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
For a display device having a solar cell and a power buffer for keeping stored electric power, a display system which has a low-power drive mode, self-contained power and no need for recharging or power wiring is provided. The display system includes a solar cell using a thin-film semiconductor, a power storage element for temporarily storing the produced power, a driving circuit, a matrix display unit, a display rewrite instruction unit for inputting screen rewrite and a control circuit and starts rewriting a display when power sufficient to rewrite an image screen is stored in the solar cell. The display device having remarkable portability and no limited battery life, which controls a display mode depending on the power produced by the solar cell, can display even when power generation is low and allows self-contained power even if the storage element has a small capacity, can be obtained.