Patent ID: 8531413

Claim:
A touch panel, comprising: a first transparent supporter plate having optical anisotropy, wherein the first transparent supporter plate has a first fast axis and a first slow axis; a second transparent supporter plate having optical anisotropy, the second transparent supporter plate being disposed over the first transparent supporter plate, and having a second fast axis and a second slow axis, wherein a direction of the second fast axis is substantially perpendicular to a direction of the first fast axis, and a direction of the second slow axis is substantially perpendicular to a direction of the first slow axis; a touch module disposed over the first transparent supporter plate, wherein the second transparent supporter plate is located between the first transparent supporter plate and the touch module; a circular polarizer; and a first phase retardation plate, the touch module being located between the circular polarizer and the second transparent supporter plate, wherein the circular polarizer comprises a linear polarizer and a second phase retardation plate, the first transparent supporter plate is located between the first phase retardation plate and the second transparent supporter plate, the second phase retardation plate is located between the linear polarizer and the touch module, and the first phase retardation plate and the second phase retardation plate both provide λ/4 phase retardation.