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Is it possible for DT028BTFT to perform "Write Display Brightness"?

Hi everybody!

We try to dim the backlight of the DT028BTFT display via software like to write the registers CTRL Display (0x53) and the regsiter Display Brightness (0x51) to control the brightness of the backlight, but writing the register shows no effect.

What could be wrong? Is it possible to control the brightness via the registers?

Kind Regards
Sebastian

 

 

Replies

engineering_seacomp's picture
engineering_seacomp
April 15, 2019

Hi,

The backlight cannot be dimmed this way using the Chip-On-Glass Ilitech.  Please use a external IC to control the backlight by PWM'ing with your micro-controller.

Please see CAT4104, see https://www.onsemi.com/pub/Collateral/CAT4104-D.PDF

Thanks,

engineering_seacomp's picture
engineering_seacomp
April 15, 2019