> LCD cells must be driven with alternating positive and negative values (of the same magnitude) to maintain an average neutral value This is called inversion

> LCD cells must be driven with alternating positive and negative values (of the same magnitude) to maintain an average neutral value This is called inversion and there are interesting web pages on the topic: * http://www.techmind.org/lcd/ http://www.techmind.org/lcd/ * http://www.lagom.nl/lcd-test/inversion.php http://www.lagom.nl/lcd-test/inversion.php * https://pixelinversion.com/ https://pixelinversion.com/