A pixel structure includes a first substrate, a plurality of thin film transistors, a wavelength conversion layer, and a metal grating polarizer layer. The thin film transistors are disposed on an inner surface of the first substrate. The metal grating polarizer layer is disposed on the plurality of thin film transistors. The wavelength conversion layer is disposed between the inner surface of first substrate and the metal grating polarizer layer. The wavelength conversion layer is configured to receive a light beam between the wavelength conversion layer and the first substrate and convert the light beam into a light wavelength band corresponding to the wavelength conversion layer.