Laser image projection system with safety means

Details Laser image projection system with safety means Laser image projection system with safety means

Filed on

1990-08-16

Date issued

1992-05-26

Examiner

Ng, Jin F.

Patent Class

Communications: electrical

SubClass

Condition responsive indicating system

SubSubClass

Specific condition

Other Related Categories

250221, 352131, 353122, G08B 1318

Type

Patent

Status

active

Patent number

051172216

Description

ABSTRACT:
An image projection system and method of use at a venue, e.g., a sports or entertainment arena, having an area or field into which an image is to be projected by the system. The system includes laser devices and associated components, e.g., a computer-based controller, for generating and projecting the image into the field. The projection system additionally comprises an override subsystem, e.g., infrared transmitters and associated detectors, forming an enclosure surrounding the field for determining if a living being has entered the field and for providing an electrical signal indicative thereof. This signal may be used automatically or manually for effecting the termination of the display.

REFERENCES:
patent: 3688298 (1972-08-01), Miller et al.
patent: 3851961 (1974-12-01), Winzer
patent: 3920319 (1975-11-01), Bryant
patent: 4249074 (1981-02-01), Zettler et al.
patent: 4288158 (1981-09-01), Frugel
patent: 4408195 (1983-10-01), Tullis et al.
patent: 4902889 (1990-02-01), Sodi

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