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US 4,225,808 AGranted
Selective illumination
AssigneeNovitas, Inc.
InventorRemo Saraceni
Life of this patent
Estimating the term…
Abstract
Different portions of an area are selectively highlighted in response to observer proximity. An adjustable dimmer establishes the non-highlight illumination level for each area. The dimmer is overridden by observer-sensing circuitry to produce the highlight illumination level.
Claims3
A method for illuminating items separated into at least one display group located in a display area comprising:
- lighting the display area using dim background lighting;
- sensing the approach of a person to said one display group;
- switching automatically the lighting from the dim background level initially provided to a level of greater intensity upon the sensing;
- sensing the departure of the person from the said one display group;
- and
- returning automatically the lighting to its original dim background level upon the sensing of the departure,
- whereby a display group may be highlighted with intense lighting when a person desirous of viewing the display is present and the display group may be maintained in a dimly lit manner when no person is present.
4 more elements
Dependencies are inferred from the claim text.