brightness control

brightness control

[′brīt·nəs kən′trōl]
(electronics)
A control that varies the luminance of the fluorescent screen of a cathode-ray tube, for a given input signal, by changing the grid bias of the tube and hence the beam current. Also known as brilliance control; intensity control.
References in periodicals archive ?
Enabling Automatic Brightness Control, which adjusts screen brightness in response to changes in room light levels, caused televisions to use 50 percent less power, on average.
Due to the large dynamic range of ambient brightness, extreme luminance and excellent brightness control are required for the HUD (depending on the brightness of the background of the virtual display) in order to produce an image that can be easily read.
With 11 levels of brightness control you are sure to have the proper illumination for your shooting situation.
Each of the 16 channels can be individually adjusted by a 4096-step greyscale PWM brightness control (equals 6.
It features automatic brightness control, one-knob operation.
Standard features include gain control, brightness control, S-Video output, controlled pure white long life LED light, portable image archiving, programmable settings, picture-in-picture freeze, image enhancement, and a SD card for image storage.
Nikon's Archer's Choice Max has extended range out to 200 yards and an Active Brightness Control Viewfinder improves low light performance.
Other features include LCD screen brightness control, low battery indicator and a one-year limited warranty.
Features to adjust the picture quality include an Auto Brightness Control, which automatically optimizes the level of brightness, while Noise Reduction is included to automatically remove video noise to provide the best possible images.
The sights have been nitrogen-purged and feature automatic brightness control with windage and elevation adjustments.
Among its advanced features are a direct ambient light sensor interface for brightness control, multi-mode dimming options using PWM and/or analog signals that can deliver up to a 25,000:1 dimming ratio, ultrasonic pulse skipping for audible noise reduction, low standby current and safety protection including on-chip thermal shut-down, over-voltage protection, opened and shorted LED protection.