Method for adapting the light intensity of the summation light to the external light
Patent 5250799 Issued on October 5, 1993. Estimated Expiration Date: 
January 28, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 28, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3180978 Selective illumination Automatic lighting control system Equi-visibility lighting control system Linear analog light-level monitoring system Compensated light sensor system Illumination control apparatus Patent #: 5019747 InventorAssigneeApplicationNo. 828917 filed on 01/28/1992US Classes:250/214AL, Ambient light responsive315/154, Selective electric switch controlled by the radiant energy responsive device315/158Radiant energy controlled regulation of the current supply for the load deviceExaminersPrimary: Nelms, David C.Attorney, Agent or FirmForeign Patent References
International ClassH01J 040/14Foreign Application Priority Data1990-07-27 DEAbstractA method and circuit arrangement for adapting the light intensity of the summation light (Ei) of a room lit by internal light (Ek) and external light (E'i) to the external light (Ea), which varies with the time of day, in which the light intensity of the internal light is controlled in dependence on one or more control parameters according to a given function and the function can be varied according to individual preference, are to be arranged so as to provide means of making finer adjustments to the light intensity in a room. This is achieved by determining the function by a plurality of independently settable function values (11), each function value (11) being variable independently of other function values (11).Other References
Field of SearchAmbient light responsiveControlling light source intensity Plural load devices Selective energization of the load devices Selective electric switch controlled by the radiant energy responsive device Load device irradiating the radiant energy responsive device Discharge control discharge device load controlled by the radiant energy responsive device Radiant energy controlled regulation of the current supply for the load device Electric switch controlled by the radiant energy responsive device | |
