| 摘要 |
<p>A semitransparent liquid crystal display device comprising a liquid crystal cell in which a liquid crystal material layer is interposed between a pair of transparent substrates having electrodes, a linear polarization plate, an optical compensation device having a twist structure, a semitransparent reflecting plate, and a circular polarization plate, wherein a drive voltage the value of which is selected from two or more values is applied to the liquid crystal material layer, whereby the display can perform display even in a reflection or transmission mode, characterized in that the linear polarization plate is disposed on one side of the liquid crystal material layer, the circular polarization plate is disposed on the other side of the liquid crystal material layer, the semitransparent reflecting plate is disposed between the liquid crystal material layer and the circular polarization plate, the optical compensation device is disposed between the linear polarization plate and the semitransparent reflecting plate, the birefringent chromatic dispersion α1 of the liquid crystal material layer is α1=1.01 to 1.35 and the birefringent chromatic dispersion α2 of the optical compensation device is α2=1.11 to 1.40 where the birefringent chromatic dispersion a is the ratio between the birefringent Δn at the wavelength μ=450 nm and the birefringent Δn at the wavelength μ=590 nm.</p> |
