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An LCD column driver using a switch capacitor DAC

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1 Author(s)
M. J. Bell ; Displays Div., Nat. Semicond. Inc., Phoenix, AZ, USA

LCD column drivers have traditionally used nonlinear R-string style digital-to-analog converters (DAC). This paper describes an architecture that uses 840 linear charge redistribution 10/12-bit DACs to implement a 420-output column driver. Each DAC performs its conversion in less than 15 μs and draws less than 5 μA. This architecture allows 10-bit independent color control in a 17 mm2 die for the LCD television market.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:40 ,  Issue: 12 )