Compared to transparent LCD, transparent OLED’s, however, are a different beast. OLED is an emissive technology and therefore does not require a backlight. This means that brightness and color reproduction will be much better compared to transparent LCD. Their brightness still isn’t going to rival a normal display, so they aren't ideal for any sort of outdoor use or in a brightly lit space. Also, in contrast to a transparent LCD that works somewhat equally on both the front and back, for now, transparent OLED is only visible on one side since the emissive element is designed to point in one direction.