Course guidance and display apparatus for vehicles
First Claim
Patent Images
1. A course guidance and display apparatus for vehicles comprising:
- a direction sensor;
a speed sensor;
a trace device provided with a laser depiction stage, trace plate, and a rotary mirror, said rotary mirror being irradiated with a laser beam so as to scan the trace plate and trace a traveling locus corresponding to detection signals from said direction sensor and said speed sensor;
a map on microfilm;
a projector provided with a light source and a projecting magnifier lens between which said trace plate and said map are interposed such that said projector magnifies and projects the traveling locus traced by the trace device and the map in superposed fashion; and
a projection screen on which the traveling locus and map is projected,wherein the traveling locus is traced when said trace plate is iradiated with the laser beam, and the traced information is erased in an erasing mode of the trace device.
1 Assignment
0 Petitions
Accused Products
Abstract
A course guidance apparatus for vehicles has a direction sensor and a speed sensor carried on the vehicle and a traveling locus corresponding to detection signals from the direction sensor and the speed sensor is plotted in a manner to be superposed on a map film and displayed on a projection screen. The traveling locus is traced by a laser beam on a trace plate having electrooptic, optomagnetic, or incoherent-to-coherent light conversion properties. The superposed picture is clearly viewed, and the misregistration between the map and the traveling locus is avoided.
17 Citations
7 Claims
-
1. A course guidance and display apparatus for vehicles comprising:
-
a direction sensor; a speed sensor; a trace device provided with a laser depiction stage, trace plate, and a rotary mirror, said rotary mirror being irradiated with a laser beam so as to scan the trace plate and trace a traveling locus corresponding to detection signals from said direction sensor and said speed sensor; a map on microfilm; a projector provided with a light source and a projecting magnifier lens between which said trace plate and said map are interposed such that said projector magnifies and projects the traveling locus traced by the trace device and the map in superposed fashion; and a projection screen on which the traveling locus and map is projected, wherein the traveling locus is traced when said trace plate is iradiated with the laser beam, and the traced information is erased in an erasing mode of the trace device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification