Patent ID: 7995174

Claim:
A liquid crystal display, comprising: a first and a second transparent substrates facing to each other; a liquid crystal layer interposed between the first and the second transparent substrates; a first polarizer positioned next to the first transparent substrate and opposite the liquid crystal layer; a second polarizer positioned next to the second transparent substrate and opposite the liquid crystal layer; and a first half wave plate provided between the first transparent substrate and the first polarizer to enable the liquid crystal display to have a normally black mode, wherein the normally black mode is obtained when the following equation is satisfied: 2α−2 r+p 1 −p 2=90 °+N *180°, where N is an integer, p 1 is the transmission-axis azimuth of the first polarizer, r is the slow-axis azimuth of the first half wave plate, α is the oriented viewing angle of the liquid crystal display, and p 2 is the transmission-axis azimuth of the second polarizer.