I don't know if your white-on-black is similar to my white-on-blue but for my case, I had to keep back light on all the time indoors. But if I turned off the back light, I can see outdoors. I had to readjust the contrast a bit though.
I don't know if your white-on-black is similar to my white-on-blue but for my case, I had to keep back light on all the time indoors. But if I turned off the back light, I can see outdoors. I had to readjust the contrast a bit though.