An electric power unit for driving a matrix-type display unit in alternating cycle mode has a multiplicity of buffer circuits for generating a multiplicity of high output voltages (high output voltage group) and a multiplicity of buffer circuits for generating a multiplicity of low output voltages (low...http://www.google.ca/patents/US7289116?utm_source=gb-gplus-sharePatent US7289116 - Electric power unit for driving a display and a display utilizing such power unit
