Patent ID: 6118507
Filing Date: 2000-09-12
Classification: G02F

Abstract:
A reflection type liquid crystal display device comprising:a two-sided panel comprising an external light incident side and an opposite side, the external light incident side comprising a transparent first substrate, the opposite side comprising a second substrate on the opposite side, the second substrate being connected to the first substrate with a space disposed therebetween for accommodating a twist-oriented nematic liquid crystal and electrodes for applying a voltage to the nematic liquid crystal;a quarter wavelength plate disposed on the first substrate side with the first substrate disposed between the nematic liquid crystal and the quarter wavelength plate;a deflection plate disposed on the quarter wavelength plate with the quarter wavelength plate disposed between the first substrate and the deflection plate;with no voltage applied to the nematic liquid crystal, the nematic liquid crystal being in a twist orientation and functioning as a quarter wavelength layer thereby allowing external light to pass therethrough and cooperatively through the deflection plate and the quarter wavelength plate resulting in a white display;with voltage applied to the nematic liquid crystal, the nematic liquid crystal being in a perpendicular orientation thereby blocking external light from passing therethrough and through the deflection plate and the quarter wavelength plate resulting in a black display;the first and second substrates being parallel to one another and the device further comprises an axis passing perpendicularly through the first and second substrates;the nematic liquid crystal having an upwardly directed orientation direction passing through the first substrate ranging from about 158.5 to about 178.5 degrees with respect to the axis;the nematic liquid crystal having an upwardly directed orientation direction passing through the second substrate ranging from about 41.5 to about 61.5 degrees with respect to the axis.