Display apparatus for vehicle

• US 4,635,034 A
• Filed: 05/11/1983
• Issued: 01/06/1987
• Est. Priority Date: 05/12/1982
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Masuda, Mitsuhiro, Naito, Shotaro, Tokuyama, Keiichi
• Primary Examiner(s): Caldwell, Sr., John W.
• Assistant Examiner(s): Queen, Tyrone
• Application Number:
  US06/493,501
• Time in Patent Office: 1,336 Days
• Field of Search: 364/424, 364/565, 377/24, 340/62, 340/52 R, 340/52 F
• US Class Current: 340/441
• CPC Class Codes: G01P 3/489 Digital circuits therefor
• CPC Class Codes: G07C 5/0816 Indicating performance data, e.g. occurrence of a malfunction

Abstract

A display apparatus for a vehicle comprising arithmetic unit for processing outputs of different sensors in accordance with a given process program so as to provide display signals adapted to be displayed on different display units, a memory for storing predetermined process programs corresponding to different display standards, and a program selecting device for selecting one of the process programs stored in the memory in accordance with a desired one of the display standards and supplying the selected process program to the arithmetic unit, whereby the display units can display signals to meet any one of the different display standards.

Claims

1. A display apparatus for a vehicle comprising:

display means for displaying a value of a parameter relating to an operation condition of the vehicle in a predetermined unit of measurement of the parameter which is speed of the vehicle;

sensor means for detecting the parameter and producing a first signal representing an actual value of the parameter in the predetermined unit of measurement;

storage means for storing a plurality of programs, each program enabling processing of the first signal to produce a second signal representing a displaying value of the parameter in the predetermined unit of measurement by which the parameter is displayed by said display means, said programs being previously prepared based on, respectively, predetermined different relationships between the actual value of the parameter in the predetermined unit of measurement and the displaying value of the parameter in the predetermined unit of measurement;

means for selecting one of said programs;

arithmetic means receiving the first signal for processing the first signal according to the selected one of said programs so as to produce the second signal representing the displaying value in accordance with the predetermined relationship between the actual value and the displaying value corresponding to the one selected program; and

means for applying the second signal produced by said arithmetic means to said display means for enabling display of the displaying value of the parameter in the predetermined unit of measurement.

2. A display apparatus according to claim 1, wherein the display means is a speedometer.

3. A display apparatus according to claim 1, wherein said means for selecting one of said programs includes a register, said register being externally selectively setable to any one of a plurality of predetermined binary codes corresponding to said different predetermined relationships between the actual value and the displaying value of the parameter.

4. A display apparatus according to claim 2, wherein said means for selecting one of said programs includes a register, said register being externally selectively setable to any one of a plurality of predetermined binary codes corresponding to said different predetermined relationships between the actual value and the displaying value of the parameter.