I am driving an LCD display backlight. There's not much info on the datasheet about the LED. This is all I have:
http://www.newhavendisplay.com/specs/NHD-C0220BiZ-FSW-FBW-3V3M.pdfIt's the same LCD Dave uses for the portable power supply (not the USB one) but with a white backlight. If you noticed, it uses 2 LEDs in parallel.
I am mainly looking for linear ones, although I have a neat idea:
My design uses a board as a front panel, similar to the µCurrent, except the circuitry is on a different board. There are buttons that need light. (they are pushbuttons, so the buttons themselves don't need light, the labels do).
Since it is much easier to find LED drivers that drive 2+ LEDs in series, I can use some LEDs to light up the labels on the front panel and have them in series with the backlight. I just have to make sure that both the display and the discrete LEDs emit an adequate amount of light.
I ordered the display already and I have a feeling that the LED will be too bright at full current (30mA).