Display unit of speedometer for automobile

Patent · Tue Dec 23 04:00:00 EST 1986

OSTI ID:6975907

Teshima, T; Naete, H; Robert, P H

A display unit of a speedometer is described for an automobile, comprising: a car speed operational circuit adapted to receive signals corresponding to car speed for producing and transmitting corresponding output signals; a set standard decision circuit coupled to the output signals of the car speed operational circuit for determining when car speed exceeds a set standard speed and for producing a corresponding output; a set medium speed decision circuit coupled to the output signals of the car speed operational circuit for determining when car speed exceeds a set medium speed and for producing a corresponding output; an OR circuit having plural inputs and an output, including a first input coupled to the output of the medium speed detector; an AND circuit having a first input coupled to an output of the set standard decision circuit, a second input coupled to the output of the OR circuit, and an output coupled to a second input of the OR circuit; and display means for displaying car speeds in at least two scale modes including a standard scale mode and an enlarged scale mode, including a bar graph display including plural display segments, a scale display, and a driving circuit for selectively driving the segments and the scale display.

• Assignee: Regie Nationale des Usines Renault, Boulogne-Billancourt
• Patent Number(s): US 4631513
• OSTI ID: 6975907
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320203* -- Energy Conservation
Consumption
& Utilization-- Transportation-- Land & Roadway
AUTOMOBILES
COMPUTER GRAPHICS
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DISPLAY DEVICES
ELECTRONIC CIRCUITS
GRAPHS
HYSTERESIS
MEASURING INSTRUMENTS
SIGNALS
VEHICLES
VELOCIMETERS
VELOCITY