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:
May. 28, 1991
Filed:
Mar. 26, 1990
Masayuki Morita, Yokohama, JP;
Kyoji Yamazaki, Yokohama, JP;
Toshiba Lighting & Technology Corporation, Tokyo, JP;
Abstract
An illumination control apparatus includes a control slave unit, a master unit, a supervisory slave unit, and a photosensor slave unit. The supervisory slave unit has an operation switch, and outputs a first signal representing an operation change of the operation switch and the supervisory slave unit. The photosensor slave unit outputs a second signal representing a change of a level of an illuminance detected by a photosensor and the photosensor slave unit. The control slave unit controls at least one illumination load. In addition, the master unit controls the control slave unit assigned in a memory in response to the first signal from the supervisory slave unit and the second signal from the photosensor slave unit. When the master unit receives the first signal representing the supervisory slave unit, the illumination load is inverted. When the master unit receives the second signal representing the photosensor slave unit, and the illuminance is higher than a preset level, the illumination load is turned off. Only when the illuminance is lower than the preset level and the operation switch of the supervisory slave unit is ON, the illuminination load is turned on.