Can we PWM an LED backlight on LCD module

[HenrikOlsson]

Oooh, me like the blue-ish/white on black in the second half, almost looks like VFDs.

[Demon]

Oooh, me like the blue-ish/white on black in the second half, almost looks like VFDs.

Yup, they are just awesome! I'm so happy I went with this supplier. If you ever want to order a large batch, let me know and I'll give you the rep's contact info over at https://cle.en.alibaba.com. They have other colours, the black-on-yellow background was real nice.

I still have current tests to do, as well as fine-tune the contrast and backlight adjustment (I want to limit the range to a safe usable range that won't fatigue the LEDs).

[Ioannis]

I am interested in the supplier please.

Ioannis

[Demon]

First test with 4 dual-encoders with LCD driven from 16F18877.

Barely 25mA to drive entire circuit, including backlight.




I still have to do more contrast & backlight tests on these, but this is awesome. I expected this to be at least 150mA.

[Demon]

I suspected my voltmeter gave a faulty reading, so I connected 2 ammeters in series (removed my yellow power LED at the bottom to give a more true reading).



14.5mA! That's just crazy low. :O

[Ioannis]

That's incredible!

Amazing LCD's...!

Ioannis

[tumbleweed]

That red one looks more like an OLED to me, and not an LCD.
a lot of them have much lower current unless you light all the pixels.

Got a datasheet?