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:
Oct. 25, 2011
Filed:
Oct. 30, 2007
Hiroyuki Sakai, Tokyo, JP;
Takehiro Koyama, Tokyo, JP;
Hideki Muramatsu, Tokyo, JP;
Toshiaki Kobayashi, Tokyo, JP;
Hiroyuki Sakai, Tokyo, JP;
Takehiro Koyama, Tokyo, JP;
Hideki Muramatsu, Tokyo, JP;
Toshiaki Kobayashi, Tokyo, JP;
Nagano Keiki Co., Ltd., Tokyo, JP;
Abstract
An LED display apparatusin which at least multiple LEDs are serially-connected to a power circuit part having a constant current power source, each one of the LEDs has a switching element parallel-connected thereto, and a control circuit part is used to selectively turn on/off the switching elements to control the LEDs for a specific display, characterized by the fact that the apparatus comprises a display matrix circuit partconstituted by parallel-connecting to the power circuit partmultiple LED circuits. . . consisting of multiple LEDs. . . and a single first switching element. . . serially-connected and second switching element. . . each parallel-connected to one of the LEDs. . . , and a control circuit partturning on the first switching elements. . . for a given time period (Ts) in sequence and turning on/off a row La, Lb, Lc . . . of multiple second switching elements. . . extending across the LED circuits. . . of the display matrix circuit partin correspondence with the first switch. . . being turned on.