In 2008 ThingWell R&D successful:ly their own Touch-key custom LCD module.
1> Advantages:
a> No need Touch Panel, achieve touch function
b> offer best contrast and durability
c> save more than 60% cost than LCM+Touch Panel
2> two solutions optional:
a> make the touch function on the surface of LCD as a conductive layer
b> use a single conductive glass to put on the upside of LCD