| 摘要 |
A tachyometric display for automotive engines comprising a display head defining a circular display field. The field comprises a plurality of concentric circular bands having a quiescent state in which all of the bands are of the same illumination level and/or color. An engine speed signal is connected through a logic circuit to change the illumination level and/or color of the bands to show speed increases. A conventional needle type speedometer indicator is combined with the display head and suitable indicia are superimposed on the display field.
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