A significant challenge in the manufacture and development of LED video screens is to achieve levels of luminance and color uniformity that are acceptable to human observers.
Blue light has been getting some attention in popular news lately regarding the potential negative effects of exposure to humans. The widespread adoption of phosphor-coated white LEDs (which encompass blue light wavelengths) in everyday use has raised concerns and spurred new research. Blue light from LED-based display devices such as smart phones and laptops has sometimes been blamed for retinal damage, insomnia, and even cancer.
Great big display screens are not just for Times Square and sport stadiums anymore. Digital signage and video walls are showing up everywhere: in retail stores and malls, at events, on public transit, in fast food restaurants, in schools, and even in your doctor’s waiting room. These types of displays are categorized as Digital Out-Of-Home (DOOH) displays.
Radiant Vision Systems VisionCAL screen correction system integrates comprehensive LED screen measurement, analysis, and correction tools. The VisionCAL system uses a high resolution ProMetric® Imaging Colorimeter to simultaneously measure the brightness and color of individual LEDs in a screen and computes correction coefficients to optimize the screen appearance.