Monitor screen with background for e.g. television or computer, has set ratio of screen brightness to background brightness

摘要

The background (20) includes a means for altering the brightness of its front surface (21) and the ratio of screen brightness to background brightness is 1.1:1 to 5:1. The background is transparent and comprises a film with a variable transparency. A sensor is used to measure screen background brightness and operate a control device for altering the brightness of the front surface of the background. The background extends above and to the sides of the screen.