Patent ID: 8928641
Filing Date: 2015-01-06
Classification: G09G

Abstract:
1. A multiplex electrophoretic display driver circuit, comprising: a memory unit adapted to receive gray-level matrix signals, the memory unit comprising two registers respectively storing a current gray-level matrix signal and a former gray-level matrix signal; an encoding circuit adapted to generate a difference-value matrix signal according to a difference between the current gray-level matrix signal and the former gray-level matrix signal, and then output a voltage-difference matrix signal which corresponds to a plurality of electrophoretic pixels, wherein the difference-value matrix signal contains a plurality of difference values; a counting circuit adapted to receive the difference-value matrix signal from the encoding circuit and including a plurality of counters which are corresponding to the plurality of difference values respectively and perform step counting to generate a plurality of refreshing values, wherein the encoding circuit adds the plurality of refreshing values to a next-cycled difference-value matrix signal to renew the voltage-difference matrix signal; and a voltage driving unit adapted to receive the voltage-difference matrix signal from the encoding circuit to drive the plurality of electrophoretic pixels of an electrophoretic display.