The human visual system (HVS) has its own limitations (e.g., the quality of eye optics, the luminance range that can be simultaneously perceived, and so on), which to certain extent reduce the requirements imposed on display devices. Still a significant deficit of reproducible contrast, brightness, and spatial pixel resolution can be observed, which fall short with respect to the HVS capabilities. Moreover, unfortunate interactions between technological and biological aspects create new problems, which are unknown for real-world observation conditions. In this talk, we are aiming at the exploitation of perceptual effects to help overcome physical limitations of display devices in order to enhance apparent image qualities. At first, we show how the perceived image contrast can be improved by exploiting the Cornsweet illusion (hallo effects). Then, we introduce glare illusion and show how it can be used for brightness boosting. Also, we present techniques for hold-type blur reduction, which is inherent for LCD displays, and apparent resolution enhancement, which enable showing image details beyond the physical pixel resolution of the display device. Finally, I discuss the role of perception in context of stereovision and accommodation/vergence conflict reduction.