Patent ID: 8891031

Claim:
A sensing device comprising: a lower panel; an upper panel facing the lower panel; and a liquid crystal layer disposed between the lower panel and the upper panel, the upper panel including an upper substrate having a first surface facing a direction where an object to be sensed would be positioned and an opposite surface facing the liquid crystal layer, both the first surface and the opposite surface being planarized; a plurality of infrared ray sensors formed in the upper panel on the opposite surface, each infrared ray sensor including a visible ray blocking film contacting the opposite surface, an insulating layer covering and contacting the visible ray blocking film, an active layer disposed on and contacting the insulating layer, a source and drain electrode, each contacting the active layer, the insulating layer and the opposite surface, a gate insulating layer disposed on the active layer and the source and drain electrodes and contacting the opposite surface, and a gate electrode disposed under the active layer and gate insulating layer; and a plurality of visible ray sensors formed in the upper panel on the opposite surface, wherein the active layer includes a material capable of sensing both visible rays and infrared rays, and the material includes at least one of amorphous germanium and micro-crystalline silicon.