Patent ID: 6989521

Claim:
A semi-transmission type liquid crystal display device comprising: a lower substrate having a reflection electrode and a lower orientation film; an upper substrate having a color filter and an upper orientation film; a liquid crystal layer interposed between the upper and lower substrates; upper and lower phase films positioned on the outer surfaces of the upper and lower substrates, respectively, for transforming linearly polarized light into circularly polarized light; upper and lower polarization plates provided on the upper and lower phase films, respectively, for transforming natural light from outside into linearly polarized light; a reflection-type liquid crystal display area; and a transmission-type liquid crystal display area located between the upper and lower substrates having no reflection electrode, wherein, in the reflection-type liquid crystal display area: the liquid crystal layer has a phase delay value (dΔn) of 0.24–0.27 μm; the upper phase film has a function of λ/4 phase compensation and an optical axis of 140° to 146°; the upper orientation film has an orientation angle of 40° to 50° relative to a horizontal line; the lower orientation film has an orientation angle of −10° to −20° relative to a horizontal line; and the upper polarization plate has a transmission axis angle of 104° to 122.5°, and, in the transmission-type liquid crystal display area: the liquid crystal layer has a phase delay value (dΔn) of 0.24–0.40 μm; the lower phase film has a function of λ/4 phase compensation and an optical axis of 50° to 64°; and the lower polarization plate has a transmission axis angle of 100° to 110°.