int_ref_reduction_voltage - Ynvisible/Ynvisible-ECD-Arduino-Library GitHub Wiki
Description:
Variable that sets the reduction voltage value when the refresh function is called. The value should be between 0 and 5 V.
Higher reduction voltage means more contrast in dark state and less contrast in bright state while lower reduction voltage means more contrast in bright state and less in dark state.
Default:
2,6V is set by default.