Reshaping the luminance distribution of OLED lighting using optical films

The angular distribution of luminance on a combination of a white organic light-emitting diode (OLED) panel and optical films was investigated through an experiment and through optical simulation. Applying an appropriate combination of separate optical films onto the OLED panel provided a great deal of flexibility in shaping the luminance profile of OLED lighting. This was due to the existence of thin air gaps between the OLED and the optical film on it as well as between the optical films, as supported by optical simulation. This flexibility may supply the OLED lighting with an additional degree of freedom, which is effective in adjusting the luminance profile freely.