Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1992-07-02
1994-04-12
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367909, G01S 1500
Patent
active
053032055
ABSTRACT:
A vehicular distance measuring system includes a distance measuring device for detecting a distance to an object and, in response, supplying a distance signal. An ultrasonic transducer mounted in a vehicle taillight or running light assembly is used to ultrasonically detect and range objects in back of, and along side a vehicle in which the system is installed. A display includes (i) a vehicular mirror having an image reflecting surface with a transparent window portion located therein, and (ii) a digital display mounted on the vehicular mirror and viewable through the window portion. The digital display is responsive to the distance signal for displaying the detected distance to the object. The distance measuring device includes a comparator for comparing the distance to the object with a predetermined threshold distance and, in response, supplying a display unblank signal. The digital display is responsive to the display unblank signal for selectively blanking the digital display and displaying the detected distance to the object. The display includes an illumination device such as light emitting diodes (LEDs) responsive to the display unblank signal for illuminating the digital display.
REFERENCES:
patent: D94715 (1935-02-01), Vail et al.
patent: 3940822 (1976-03-01), Emerick et al.
patent: 4500977 (1985-02-01), Gelhard
patent: 4943796 (1989-06-01), Lee
patent: 4974215 (1990-11-01), Bolz et al.
Gauthier Dale R.
Wayne Thomas R.
Pihulic Daniel T.
Trend Tec Inc.
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