| 摘要 |
PURPOSE:To selectively perform a plurality of displays by a single means, by selectively performing displays by the valve elements corresponding to sensors detecting not only the inclinations in a before-and-behind direction and a left-and-right direction but also an advance azimuth. CONSTITUTION:An advance azimuth detection sensor 21, a before-and-behind direction inclination detection sensor 22 for detecting the inclination in the before-and-behind direction with respect to an advance direction and a left-and- right direction inclination detection sensor 23 for detecting the inclination in the left-and-right direction with respect to the advance direction are respectively connected to an A/D converter 25 through the first, second and third valve elements 241, 242, 243 of a valve unit 24. All of the elements 241, 242, 243 are dominated by a display drive circuit 26 and the converter 25 is connected to a display device 27 through the circuit 26. Either one of the valve elements 241, 242, 243 is selectively closed corresponding to the order signal C of a change-over switch 28 and the display relating to the corresponding input signal is performed on the display device 27. By this method, a plurality of displays can be selectively performed by the single display device.
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