Conferences and supporting programme
From Sunlight to Moonlight – An LCD with superior image quality for all lighting environments
Owing to superior viewing angle performance, Fringe Field Switching (FFS) LCD has become the premium quality display mode for many different applications, ranging from automotive to smartphone. In a dark environment, FFS LCD has a high (>1000:1) Ambient Contrast Ratio (ACR) and wide colour gamut. However, as the level of ambient lighting increases the ACR decreases and the colour gamut is reduced leading to poor sunlight readability of the display, especially in direct sunshine. The reduction of ACR and colour gamut is caused by reflections of ambient light from both the front surface and internal structure of the FFS LCD. Front surface reflections can be minimised using an anti-reflection coating but reflections from the internal structure of a conventional FFS LCD persist. The conventional method to maintain an acceptable ACR (>10:1) in direct sunlight is to increase the light output from the FFS LCD backlight. However, increasing the backlight luminance increases power consumption which shortens battery life in mobile applications (such as smartphone) and may lead to unwanted heat management challenges in non-mobile applications (such as automotive). Introduced in 2015, Sharp’s Progressive Super View (PSV) technology significantly reduces all reflections from vertically aligned (VA) LCD. Consequently, PSV VA LCD enables good image quality in all lighting environments. However, because the viewing angle performance of VA LCD is inferior to FFS LCD, Sharp has recently developed PSV technology that is compatible with FFS LCD. PSV FFS LCD benefits from both the wide viewing angle performance of a conventional FFS LCD and the sunlight readable feature of PSV VA LCD. PSV FFS LCD has both high ACR and wide colour gamut in direct sunlight without increasing backlight power consumption. Therefore PSV FFS LCD enables new design approaches, especially for automotive applications, that are not possible with either conventional FFS LCD or PSV VA LCD.
--- Date: 28.02.2019 Time: 14:15 - 14:35 Location: Conference Counter NCC Ost