Liquid-crystal display device

Claim 2

A liquid-crystal display device comprising: a double-layered-type liquid-crystal cell that is composed of a first cell layer and a second cell layer, said cell containing liquid-crystal molecules with a twisted nematic orientation therein and a voltage-applying means in one of the first and second cell layers, wherein the angle of twist of the liquid-crystal molecules in the first cell layer is opposite to that of twist of the liquid-crystal molecules in the second cell layer, said angle of twist of the liquid-crystal molecules in each of the first and second cell layers being in the range of 180° to 360°, and the orientation of the liquid-crystal molecules in the first cell layer in the vicinity of the second cell layer is at right angles to that of the liquid-crystal molecules in the second cell layer in the vicinity of the first cell layer, wherein Δn.sub.2 d.sub.2 <0.85Δn.sub.1 d.sub.1, wherein the relationship between the pitch p of twist of the liquid-crystal molecules in the cell layer that has the voltage-applying means therein and the thickness d of the liquid-crystal layer in the said cell layer is as follows: θ/2π-1/4<d/p≲θ/2π wherein θ is the angle of twist of the liquid-crystal molecules.

Claim 3

A liquid-crystal display device comprising: a double-layered-type liquid-crystal cell that is composed of a first cell layer and a second cell layer, said cell containing liquid-crystal molecules with a twisted nematic orientation therein and a voltage-applying means in one of the first and second cell layers, wherein the angle of twist of the liquid-crystal molecules in the first cell layer is opposite to that of twist of the liquid-crystal molecules in the second cell layer, said angle of twist of the liquid-crystal molecules in each of the first and second cell layers being in the range of 180° to 360°, and the orientation of the liquid-crystal molecules in the first cell layer in the vicinity of the second cell layer is at right angles to that of the liquid-crystal molecules in the second cell layer in the vicinity of the first cell layer, wherein Δn.sub.2 d.sub.2 <0.85Δn.sub.1 d.sub.1, and wherein the relationship between the pitch p of twist of the liquid-crystal molecules in the cell layer that has the voltage-applying means therein and the thickness d of the liquid-crystal layer in the said cell layer is as follows: θ/2π-1/4<d/p<θ/2π wherein θ is the angle of twist of the liquid-crystal molecules, and wherein a color filter layer is disposed in at least one of the first and second cell layers.

Claim 4

A liquid-crystal display device comprising: a double-layered-type liquid-crystal cell that is composed of a first cell layer and a second cell layer, said cell containing liquid-crystal molecules with a twisted nematic orientation therein and a voltage-applying means in one of the first and second cell layers, wherein the angle of twist of the liquid-crystal molecules in the first cell layer is opposite to that of twist of the liquid-crystal molecules in the second cell layer, said angle of twist of the liquid-crystal molecules in each of the first and second cell layers being in the range of 180° to 360°, and the orientation of the liquid-crystal molecules in the first cell layer in the vicinity of the second cell layer is at right angles to that of the liquid-crystal molecules in the second cell layer in the vicinity of the first cell layer, wherein Δn.sub.2 d.sub.2 <0.85Δn.sub.1 d.sub.1, and wherein the relationship between the pitch p of twist of the liquid-crystal molecules in the cell layer that has the voltage-applying means therein and the thickness d of the liquid-crystal layer in the said cell layer is as follows: θ/2π-1/4<d/p<θ/2π wherein θ is the angle of twist of the liquid-crystal molecules, and wherein a color filter layer is disposed in at least one of the first and second cell layers.

Claim 5

A liquid-crystal display device comprising: a double-layered-type liquid-crystal cell that is composed of a first cell layer and a second cell layer, said cell containing liquid-crystal molecules with a twisted nematic orientation therein and a voltage-applying means in one of the first and second cell layers, wherein the angle of twist of the liquid-crystal molecules in the first cell layer is opposite to that of twist of the liquid-crystal molecules in the second cell layer, said angle of twist of the liquid-crystal molecules in each of the first and second cell layers being in the range of 180° to 360°, and the orientation of the liquid-crystal molecules in the first cell layer in the vicinity of the second cell layer is at right angles to that of the liquid-crystal molecules in the second cell layer in the vicinity of the first cell layer, wherein Δn.sub.2 d.sub.2 <0.85Δn.sub.1 d.sub.1, and wherein the relationship between the pitch p of twist of the liquid-crystal molecules in the cell layer that has the voltage-applying means therein and the thickness d of the liquid-crystal layer in the said cell layer is as follows: θ/2π-1/4<d/p<θ/2π wherein θ is the angle of twist of the liquid-crystal molecules, and wherein an active device is disposed on each picture element in at least one of the first and second cell layers.

Claim 6

A liquid-crystal display device comprising: a double-layered-type liquid-crystal cell that is composed of a first cell layer and a second cell layer, said cell containing liquid-crystal molecules with a twisted nematic orientation therein and a voltage-applying means in one of the first and second cell layers, wherein the angle of twist of the liquid-crystal molecules in the first cell layer is opposite to that of twist of the liquid-crystal molecules in the second cell layer, said angle of twist of the liquid-crystal molecules in each of the first and second cell layers being in the range of 180° to 360°, and the orientation of the liquid-crystal molecules in the first cell layer in the vicinity of the second cell layer is at right angles to that of the liquid-crystal molecules in the second cell layer in the vicinity of the first cell layer, wherein Δn.sub.2 d.sub.2 <0.85Δn.sub.1 d.sub.1, and wherein the relationship between the pitch p of twist of the liquid-crystal molecules in the cell layer that has the voltage-applying means therein and the thickness d of the liquid-crystal layer in the said cell layer is as follows: θ/2π-1/4<d/p<θ/2π wherein θ is the angle of twist of the liquid-crystal molecules, and wherein an active device is disposed on each picture element in at least one of the first and second cell layers.