Motion triggered device/triggered message delivery system
US5032716A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 11, 1989 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Sep 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Supermarket point of purchase advertising typically consists of advertisements, brochures, coupons and the like disposed on shelving units. To attract prospective purchasers to such advertising and to constitute point of purchase advertising itself, there is disclosed a shelf-edge mounted device which senses an approaching shopper and then delivers an audio message. The device has an optical sensor which is pointed underneath a shelf and towards the interior of the shelving unit, and detects the shadow of the approaching shopper cast on the back of the shelving unit. A background plate in the field of view of the sensor improves its sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.