Hello Vernon, Thank you for your post. I looked at the spec sheet to verify how much is the forward current for the blue backlight; unfortunately, that information is missing. I am going to look for the full spec for the blue backlight. In the mean time, I suggest only 15 Ohms for the current limit...

MOP-AL204A-BBTW I am going to purchase this display. I note that the backlight supply is 4.1V. Is this a "bare" LED or is there some kind of current regulator in the display ? Do I need to provide a series resistor to limit the current as I would with any LED ? I was thinking 5.6 OHM 2 Wat...