Smear Control for Scrolling Displays
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Scrolling of images or blocks of text across a CRT display screen incorporating a medium-to-long persistence phosphor leaves a trail or smear of after-image which is annoying to the operator and hinders the reading of the displayed information. The problem is alleviated by providing the screen with a low intensity background illumination automatically invoked during the scrolling operation.