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Display quality - warm-up time?

I have a few of the PTS and non-PST versions. All of them seem to have bad contrast consistancy across the display when first powered up. After about 10 minutes remaining powered up the display appears as normal (beautiful).

This is evident when a grey or black background- in room tempature conditions.

Is there a method/power-on procedure to circumvent this issue?

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Replies

Trash80's picture
Trash80
April 21, 2020

Fixed my own problem. Display driver library had the "Power Control 1 (C0h)" register set to 5v hardcoded by default.

engineering_seacomp's picture
engineering_seacomp
April 21, 2020

Hi,

 

Yes, for TFT displays, if it is cold the crystals basically "warm-up".  This is normal operation of TFT.

If you don't have a battery powered device, you could leave the TFT on, but turn the backlight off.

Thanks,

Trash80's picture
Trash80
April 21, 2020

The issue was not normal- but It was solved by changing the register "Power Control 1 (C0h)" from 5v to 3.3v.