JBC AD2950 Display Backlight Mod

I really like my JBC soldering station, perfect and robous tool. I usually just put the handpiece back to its holder, and after a few minute the station will activate the hibernation mode (no heating).
This is a great feature because you don't have to turn on and off the station, but sometimes, for example when your 2 years old daughter start exploring your lab this can be dangerous. If you let the iron in hibernation mode, it is start heating very quickly (5 sec. from room temp.) as soon as you pull the handpiece out of its holder. Fortunately, my daughter dropped down the handpiece in time, and she don't get burned, but this was a terrible mistake as a dad because things could be happen much worse than in my case.
The problem is when the soldering station is turned on, you don't get enough visual notification about it. The display are saying "hibernation" of course, but if you tired or you are in hurry, you probably miss it, and you will forget to turn it off.

My solution for this problem was the illuminated display. It is clearly visible and noticeable when the soldering station is running.
I grab one of my broken smartphone LCD backlight system, and it is perfectly served my idea.
I tried one of my classic 16X2 LCD display backlight system, but it was too fat and I can not make it fit because there was not too much gap between the station case the display and the PCB itself. So i had to used only backlight panel, not the whole module.
I cropped the LED string too, so the backlight was powered by 4 LEDs.
The whole system powered by an 8.8V source with a current limiting resistor.