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:
Jun. 23, 2015
Filed:
Oct. 02, 2013
Rohm Co., Ltd., Kyoto, JP;
Hidekazu Kikuchi, Kyoto, JP;
Akinobu Sawada, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
The light emitting device control circuit devicein accordance with the disclosure includes a power source V, a transistor TR, a light emitting unit EU, switches Sto S, constant current sources CCto CC, and a controller. A switching voltage Vsis supplied from the controllerto turn ON or turn OFF the transistor TR intermittently, a pulse voltage is supplied to a pulse voltage supplying line Yconnected to a drain terminal D of the transistor TR. The driving signals SPto SPare sequentially supplied to the switches Sto Sto turn ON or turn OFF them (i.e., time division drive). The light emitting devices Ato Aare driven sequentially by a pulse current (i.e., time division drive) when a high voltage is supplied to the pulse voltage supplying line Yand when the driving signals SPto SPare turned ON.