If the light was really close to your brain, the headache might as well have been caused by the electric field of the lamp. You could try a high quality LED headlamp of the flood or floody type.
Pixel QI's screen technology has always been plagued by poor contrast. I am afraid Dasung's screen will also need some external light, but I am confident it is far more usable than Pixel QI.
Forums where headlamps are discussed :
http://budgetlightforum.com/forum
http://www.candlepowerforums.com/vb/...hp?6-Headlamps
One model that might suit you because it is a high CRI warm white lamp, so better for the eyes :
http://www.ebay.com/itm/ArmyTek-Wiza...item5b0606a665