Pulse width modulation for correcting non-uniformity of acoustic inkjet printhead

摘要

An apparatus for pulse width modulation comprises a delaying means (DL1-DL32) which receives a pulse (IP) and creates a plurality of modulated pulses. The pulse (IP) has a first pulse edge (t1) and a second pulse edge (t2). The apparatus further comprises a lookup table (66) for storing individual delay data for each of said plurality of modulated pulses, which delay data is communicated from the lookup table (66) to the delaying means (DL1-DL32). The delaying means (DL1-DL32) is responsive to the delay data from the lookup table (66) to delay only the first pulse edge of each pulse. <IMAGE>