Glass LCOS power draw study, recommends OLED

http://www.ruf.rice.edu/~mobile/publications/likamwa2014glass.pdf

Efficient Projection: The LCOS projection consumes two

orders of magnitude more power than its proximity requires,

due to luminance drops in the display path. Replacing this

projection with a transparent OLED screen in front of the

eye would reduce power draw by avoiding luminance drops.

Moreover, the see-through nature of OHMDs means that for

many apps, few pixels are active at any time. This is optimal

for OLED, as inactive pixels do not draw power.

Efficient Projection: The LCOS projection consumes two

orders of magnitude more power than its proximity requires,

due to luminance drops in the display path. Replacing this

projection with a transparent OLED screen in front of the

eye would reduce power draw by avoiding luminance drops.

Moreover, the see-through nature of OHMDs means that for

many apps, few pixels are active at any time. This is optimal

for OLED, as inactive pixels do not draw power.

.......Efficient Projection: The LCOS projection consumes two

orders of magnitude more power than its proximity requires,

due to luminance drops in the display path. Replacing this

projection with a transparent OLED screen in front of the

eye would reduce power draw by avoiding luminance drops.

Moreover, the see-through nature of OHMDs means that for

many apps, few pixels are active at any time. This is optimal

for OLED, as inactive pixels do not draw power.