EVE2-43G brightness increase possible?
Posted: Thu Aug 22, 2019 7:56 am
After getting the EVE2-43G display working, I presented it to potential users, and their first comment was "can you increase the brightness?" And yes, actually, though I have not measured it, it is notably dimmer than other similar LCDs, e.g. my phone.
I am running it with a measured 3.28V on both pairs of power input pins (1,2,15,16), and the backlight duty register is at max (128). I do note that most of the brightness change is values 0-5, with only modest increase in brightness after that: Brightness change is indistinguishable from about 60 through 128 (and increasing past 128 does nothing). FWIW, it's pulling 200 mA at full bright (measured at the input of the 3.3V linear regulator that feeds it).
Is it possible to increase the brightness of this module? Can I populate R1,R2, apply power to pins 17-20, and change R5? Or are the LEDs and/or boost IC maxed out?
I am running it with a measured 3.28V on both pairs of power input pins (1,2,15,16), and the backlight duty register is at max (128). I do note that most of the brightness change is values 0-5, with only modest increase in brightness after that: Brightness change is indistinguishable from about 60 through 128 (and increasing past 128 does nothing). FWIW, it's pulling 200 mA at full bright (measured at the input of the 3.3V linear regulator that feeds it).
Is it possible to increase the brightness of this module? Can I populate R1,R2, apply power to pins 17-20, and change R5? Or are the LEDs and/or boost IC maxed out?