but a white LED will have a voltage drop of no less than 2.5V
Oh right, i forgot about voltage drop.
Mind you, I do wonder why people want to PWM the backlight on these LCDs.
Well on this project i think ill just set it to some brightness. Allthough If i use LCD where it can be day or night, i want LDR to change brightness. Its usually way too bright at nights.
in which case you bypass the transistor
Bypass the backpacks transistor? I could just replace that jumper with a resistor?