Automotive priority message display

A system for singly indicating the ocurrence of any of a plurality of events in a motor vehicle and for indicating only the event of most significance when more than one event occurs concurrently, comprising

• a display device for selecting messages for display and for singly displaying messages corresponding to the events,
• code means controlled by the display device for producing a first electrical signal having a different value for each selected message,
• a plurality of normally open sensor switches each closed in response to an event and each having a different priority according to the significance of the event,
• an array of resistors connected in series at junction points and having one end of the array connected through a voltage dropping resistor to a power supply, the sensor switches being connected in order of priority between the junction points and ground with the highest priority sensor switch connected to the junction point nearest the said one of the array, so that closure of a sensor switch develops a second electrical signal having a unique value corresponding to the value of the first electrical signal for the message denoting the sensed event and whereby the concurrent closure of other switches of lower priority has no effect on the value of the second electrical signal,
• and means comparing the first and second electrical signals to determine correspondence between the selected message and the sensed event of highest priority and for controlling the display device to select and display the message corresponding to the sensed event of highest priority.

A system for singly indicating the occurrence of any of a plurality of events in a motor vehicle and for indicating only the event of most significance when more than one event occurs concurrently, comprising

• a display device operated by a motor for sequentially selecting messages for display and means including a display lamp for singly displaying messages corresponding to the events,
• code means controlled by the display device for producing a first electrical signal having a different voltage for each selected message,
• a plurality of normally open sensor switches each closed in response to an event and each having a different priority according to the significance of the event,
• an array of resistors connected in series at junction points and having one end of the array connected through a voltage dropping resistor to a power supply, the sensor switches being connected in order of priority between the junction points and ground with the highest priority sensor switch connected to the junction point nearest the said one end of the array, so that closure of a sensor switch develops a second electrical signal having a unique voltage substantially equal to the voltage of the first electrical signal for the message denoting the sensed event and whereby the concurrent closure of other switches of lower priority have no effect on the voltage of the second electrical signal, and
• a comparison circuit for comparing the voltages of the first and second electrical signals for operating the motor to sequentially select messages when the two voltages are substantially different, and for stopping the motor when the two voltages are substantially equal, thereby indicating that the selected message corresponds to the highest priority closed sensor switch,
• and a circuit activated when a sensor switch is closed and the motor is stopped for illuminating the display lamp to display the selected message.