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Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: dudo on April 24, 2014, 04:26:36 PM

Title: Changing contrast on LCD?
Post by: dudo on April 24, 2014, 04:26:36 PM
Hi.
I know how to change brightness (or backlight) on LCD (as someone wrote howto, using PWM). Is it possible to change contrast on e.g. 10" LCD?

Thanks.
Title: Re: Changing contrast on LCD?
Post by: MBR on April 24, 2014, 11:13:27 PM
Not in LCD itself and you can only decrease it by modifying RGB output LUTs. I'm not sure if Mali has them.
Title: Re: Changing contrast on LCD?
Post by: dave-at-axon on April 25, 2014, 05:53:52 AM
TFT's generally don't have contrast controls. Some computer monitors do but they have internal circuits to do this.

Your only control will be brightness of the backlight.
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