US Patent 8027013 - Carbon nanotube heating layers for LCDs

http://www.freepatentsonline.com/8027013.html

The threshold voltage of switching in LCDs depends inversely on the temperature so high temperature operation is desirable to achieve good color contrast with low operational voltage. This patent from Hon Hai Precision (Foxconn) teaches using carbon nanotube film as a heater to reduce the threshold voltage. Claim 1 reads:

1. A liquid crystal display comprising:

a first substrate;

a second substrate;

a liquid crystal layer sandwiched between the first substrate and the second substrate;

a first transparent heating layer located on the first substrate;

a second transparent heating layer located on the second substrate, at least one of the first the second transparent heating layers comprises a carbon nanotube structure.