| 摘要 |
A shift stage display device for an automatic transmission of a vehicle includes a power supply for supplying stable power to a circuit while the vehicle is running; a control device for determining a shift stage according to running states of the vehicle to output a predetermined shift control signal; an interface circuit for controllably turning on and off a solenoid valve according to the control signal output from the control device to thereby output a predetermined signal corresponding to a shifting state of the running vehicle according to a prior established program; and a shift stage display for displaying each position of the shift stage of the running vehicle according to the predetermined signal output from the interface circuit, such that the ground of automated vehicle and the ground of the display device are separated, in order to preclude no influence of surge voltage, and to display at which speed the running shift range is in.
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