Is a feature found on many monitors. It allows the user to manually select the level of screen backlighting (brightness).

a control that varies the brightness of the fluorescent screen of a cathode-ray tube (CRT) by changing the grid bias of the tube, thereby changing the beam current.

is a control in the monitor which does not change the amplitude of the video signal but increases or decreases the illumination of the phosphors on the screen.

The control on a television monitor that increases or decreases the radiance of an image.

The manual bias control on a cathode ray tube or other display device that controls the average brightness and the contrast of a picture.