Microreplicated light redirecting films suitable for use in autostereoscopic displays and backlights are made to incorporate at least one nanovoided layer whose interface with another layer forms an embedded structured surface of the light redirecting film. Each pixel has a photoelectric conversion unit, an amplifier for amplifying and outputting a signal from the photoelectric conversion unit, and a capacitor connected to the output of the amplifier. According to the present invention, the drive current of an LED array can be output in the form of a sine wave by a constant-current regulation or constant-power regulation even when input voltage varies, thus suppressing harmonics, improving the power factor, minimizing flicker, and preventing a temperature increase in the LED array and in an LED operation control circuit. An error reporting process is performed. The outer material has a modulus of elasticity of between 14 and 170 kgcm2 and a tensile strength between 100 and 650 kgcm2.