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:
Dec. 12, 2000
Filed:
Oct. 29, 1999
Sung-hoo Han, Suwon, KR;
Sang-ug Kang, Sungnam, KR;
Samsung Electronics Co., Ltd., Kyungki-Do, KR;
Abstract
An illumination control apparatus for controlling illumination by detecting a change in an environment is provided. The illumination control apparatus includes a magnetic field detector for detecting a change in a magnetic field generated by a magnetized ferroelectric object to output a first signal having a voltage which is proportional to the change in the magnetic field; an amplifier for amplifying the first signal; a discriminator for discriminating a level of the amplified voltage to output an illumination on-signal having a first logic level if the level of the amplified voltage is higher than a predetermined voltage, and otherwise to output an illumination off-signal having a second logic level; an illumination controller for outputting an illumination driving voltage in response to the illumination on-signal having the first logic level; and an illumination portion for producing light in response to the illumination driving voltage. Thus, the illumination control apparatus can turn illumination on/off by detecting the approach of a key in any locking system for use in, for example, the front door of a house, cars or office supplies, which requires that the key made of a ferroelectric material is magnetized. Also, the illumination control apparatus can control illumination in response to a specific action of a user and can be easily installed in a limited space.