Patent ID: 6559909
Filing Date: 2003-05-06
Classification: G02F

Abstract:
A liquid crystal display element including:(I) a light source device comprising the following (i) to (iii): (i) a light guide body comprising a transparent medium, and having an end face through which the light emitted from a light source can be introduced, a pair of opposing faces one of which works as a light emission face and a haze anisotropic layer, wherein the haze value is expressed by the following formula (1) when the incident light is linearly polarized light, H(%)=DF/TTÃ—100â€ƒâ€ƒ(1) â€ƒwherein, DF is a diffused light transmittance, and TT is a total light transmittance, and the haze value varies depending on a vibration direction of the linearly polarized light, (ii) a light source placed at the end face of said light guide body, and (iii) a reflecting body placed at the opposite side of the light emission face side of said light guide body, and (II) a polarizing plate placed at the light emission face side of the above-mentioned light guide body in such a manner that the polarization axis is parallel to the direction having the largest haze value in the above-mentioned haze anisotropic layer, wherein the light source device emits mainly the linearly polarized light having a vibration plane parallel to the direction having the largest haze value in the haze anisotropic layer, and characterized in that the haze anisotropic layer comprises a polymer film satisfying the following formula (2) Hmax/Hmin&gE;1.05â€ƒâ€ƒ(2) wherein Hmax is the haze value in the direction having the largest haze value, and Hmin is the haze value in the direction having the smallest haze value, and said polymer film is in contact with the surface of the transparent medium through an adhesive layer.