P‐17.3: Visibility Research Based on Ambient Light Contrast

In the development process of displays, the viewer's experience is particularly important. However, in actual use, unlike the dark‐room test, there will be a certain amount of ambient light, which will affect the visibility of the display screen. As ambient illumination increases, the viewing effect of the display screen will also deteriorate. For example, it is difficult to see the screen clearly outdoors with bright sunlight, which is quite different from the viewing effect in dark room. In this article, we will study the visibility of public mode display and privacy mode display. For public mode display, both the central view angle and large view angle can see the screen clearly regardless of the ambient light brightness. For privacy mode display, no matter what the ambient light conditions are, it is invisible for the large view angle, while the center view angle can see clearly. And respectively propose two ways to improve the ambient contrast. In public mode, LCD with advanced reflective invisible technology with embedded system (ARIES) can achieve excellent visibility in various ambient light condition from indoors to outdoors without boosting the backlight brightness and sacrificing other performance for better visibility. In privacy mode, the view angle control cell (VAC) and privacy film are used to reduce the ambient light contrast of the privacy display, which fully satisfies the requirements of being invisible in the outdoor environment at a large view angle conditions, and can meet the privacy performance in some low ambient light. Author Keywords