Patent ID: 7425743

Claim:
A projection television set comprising: a light source, which emits a light; (n−1) dichroic mirrors, which divide the light into n components; n liquid crystal panels, wherein each of the n components of the light enters a corresponding one of the n liquid crystal panels; and a dichroic prism, by which the n components of the light are combined, wherein each of the n liquid crystal panels comprises: a substrate; a pixel portion comprising: a first thin film transistor comprising: an active layer over the substrate; a gate insulating layer over the active layer; and a gate electrode over the gate insulating layer; a capacitor element comprising: a first electrode electrically connected to the active layer; an insulating layer over the first electrode; and a second electrode over the insulating layer; and a pixel electrode electrically connected to the active layer; a signal line electrically connected to the first thin film transistor; and a driver portion electrically connected to the signal line, comprising a second thin film transistor over the substrate, wherein the active layer comprises a crystalline silicon layer, wherein the insulating layer comprises a silicon nitride, and wherein the number n is a natural number larger than 1.