Phosphor is a chemical substance applied to the inner surface of display screens, such as computer monitors or television tubes, that emits light when electrically charged. In photography and digital imaging, phosphors are critical for rendering images accurately on screens, as they determine colour brightness and luminance.
Over time, the performance of phosphors can degrade, causing shifts in colour accuracy and brightness. For photographers and digital artists who require consistent and precise colour reproduction, regular monitor calibration is essential to compensate for these changes and ensure that images appear true to their original tones.