Display device for measuring instruments

A display device for displaying on a dial the value of at least one quantity represented by input data, comprising:

• a mobile indicator member driven by a stepping motor;
• a first control circuit responsive at least indirectly to said input data for providing drive pulses to the stepping motor to bring the indicator member to a position corresponding to the value of said the quantity represented by said input data;
• means for presenting a plurality of indexing systems which cooperate with said indicator member to indicate at least a range in which the value of said quantity is situated;
• said means for presenting said indexing system comprising a single electro-optical display cell for displaying at least two indexing systems;
• a second control circuit for supplying control signals to said display cell in response to an activation signal;
• and,
• said second control circuit including means responsive to a selection signal for supplying different control signals to said display cell to cause it to selectively display one or another other of said indexing systems.

A display device for displaying on a dial the value of at lest one quantity represented by input data, comprising:

• a mobile indicator member driven by a stepping motor;
• a first control circuit responsive at least indirectly to said input data for providing drive pulses to the stepping motor to bring the indicator member to a position corresponding to the value of said quantity;
• means for presenting an indexing system which cooperates with said indicator member to indicate at least in which range the value of said quantity is situated;
• said dial comprises an electro-optical display cell for displaying said indexing system in response to control signals;
• said device also comprising a second control circuit for supplying said control signals to said display cell in response to an activation signal;
• said display cell being arranged to display at least two indexing systems and, said second control circuit including means responsive to a selection signal for supplying different control signals to said display cell to cause it to selectively display one or another of said indexing systems, the two indexing systems corresponding to ranges of different values of said quantity, said display device further comprising means responsive to said selection signal for processing said input data before sending it to said first control circuit whereby the number of pulses supplied to the motor is adapted to the indexing system displayed by the cell.