| 摘要 |
PURPOSE:To economize on space and to eliminate erroneous recognition at the same instant by forming plural sets of information into respective intrinsic colors, collecting the information into a prescribed air area, separating the single information by a wavelength selecting light source among the connected sets of the information from the others and indicating specially the separated information. CONSTITUTION:Two sets of the information, i.e., speed indication and number of revolution display float on a hologram 1 and are specially indicated when an illuminating light 6 for reproduction is lighted up. A driving signal 14 for speed out of the driving signals 14, 15 for speed and num ber of revolution held preliminarily in a signal selector 12 is outputted and at the same time, a filter 7 is put into the optical path of the source 6 by a wavelength selector 9 when a selection signal 13 for speed is inputted to the wavelength selector 9 and the signal selector 12. A scale 4 for indicating the number of revolution and a number 5 for indicating the number of revolution are thus made invisible as if both disappear from the image screen and only the scale 2 for indicating the speed and number 3 for indicating the speed are visibly recognized by a driver 16. A hand 10 is also changed over so as to be driven by the signal for indicating the speed at the same instant in the stage of change over and therefore the specially indicated speedometer is shown before the eyes of the driver 11.
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