Contrast ratio is an important criterion in screen quality. The ratio is derived by the brightest luminance divided by the darkest luminance in candelas per square meter (cd/m 2). For example ...

If you choose to use color, you should ensure adequate color contrast, at least a 4.5:1 contrast ratio between the text and background and accessibility friendly colors. Users should be able to scan a ...

Adjusting the LED backlight in an LCD TV or monitor on the fly to create a higher contrast ratio. When a dark image is displayed, the LEDs are dimmed or turned off behind the pixels. When light ...