Patent ID: 7330230

Claim:
A reflex liquid crystal display device comprising: a first substrate with a transparent electrode; a second substrate with a light reflective electrode; and a layer of vertically-aligned liquid crystal material interposed between said first and second substrates positioned opposite to each other in a state where said transparent electrode and said light reflective electrode have mutually opposed surfaces, wherein an alignment film is formed on each of the mutually opposed surfaces of said transparent electrode and said light reflective electrode, and the thickness of said vertically-aligned liquid crystal layer is less than 2 μm, the refractive index anisotropy Δn of said liquid crystal material is more than 0.1 and less than 0.13, and said vertically-aligned liquid crystal layer includes a plurality of liquid crystal molecules each having a pre-tilt angle controlled within a range of 1° to 7°, wherein a voltage for saturating a light output with respect to a light input to said layer is within a range of less than 6 volts.