US 12,254,847 B2
High impedance driver for bi-stable and multi-stable displays and method to drive same
Quanshui Shi, Shenzhen (CN); and Steve Beldon, Malvern (GB)
Assigned to New Vision Display, Inc., Roseville, CA (US)
Filed by New Vision Display, Inc., Roseville, CA (US)
Filed on Oct. 25, 2022, as Appl. No. 17/973,298.
Claims priority of provisional application 63/272,337, filed on Oct. 27, 2021.
Prior Publication US 2023/0131155 A1, Apr. 27, 2023
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3622 (2013.01) [G09G 3/3629 (2013.01); G09G 3/3681 (2013.01); G09G 3/3692 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0257 (2013.01); G09G 2330/021 (2013.01); G09G 2330/023 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of addressing a passive matrix liquid crystal display comprising:
providing a plurality of pixels, wherein the plurality of pixels is arranged into a plurality of rows and a plurality of columns to form an array, and wherein each pixel in the plurality of pixels comprises a plurality of liquid crystal molecules, and wherein an electric signal applied to one of the plurality of rows and one of the plurality of columns creates an electric field across plurality of liquid crystal molecules of each pixel in the plurality of pixels at an intersection of the one of the plurality of rows and the one of the plurality of columns;
providing a row driver comprising a plurality of row outputs;
providing a column driver comprising a plurality of column outputs;
outputting a row signal on at least one of the plurality of row outputs;
outputting a column signal on at least one of the plurality of column outputs;
driving a target image using the row signal and the column signal;
setting at least one of the plurality of row outputs or at least one of the plurality of column outputs to a high impedance state wherein when the at least one of the plurality of row outputs is in the high impedance state, the at least one of the plurality of row outputs is isolated from the row driver and when the at least one of the plurality of column outputs is in the high impedance state, the at least one of the plurality of column outputs is isolated from the column driver; and
addressing the passive matrix liquid crystal display by applying a voltage to at least one of the plurality of pixels within the array.