Search results
Results from the WOW.Com Content Network
A CRT in a TV is commonly called a picture tube. CRTs have also been used as memory devices , in which case the screen is not intended to be visible to an observer. The term cathode ray was used to describe electron beams when they were first discovered, before it was understood that what was emitted from the cathode was a beam of electrons.
The Chromatron is a color television cathode ray tube design invented by Nobel prize-winner Ernest Lawrence and developed commercially by Paramount Pictures, Sony, Litton Industries and others. The Chromatron offered brighter images than conventional color television systems using a shadow mask, but a host of development problems kept it from ...
Burn-in on a monitor, when severe as in this "please wait" message, is visible even when the monitor is switched off. Screen burn-in, image burn-in, ghost image, or shadow image, is a permanent discoloration of areas on an electronic visual display such as a cathode-ray tube (CRT) in an older computer monitor or television set.
The television is a Montgomery Ward Airline 84GSE3011A (made by Sentinel Radio and Television Corp.) From 1946 to 1951 the 7JP4 was a common CRT (picture tube, or kinescope) used in lower priced televisions sold in the United States. These television were popular for portable carry around and small table top sets.
The tube was arranged with three separate electron guns, one each for red, green, and blue (RGB), arranged around the outside of the picture area. This made a Geer tube quite large; the "necks" of the tubes normally lie behind the display area and give the TV its depth, whereas in the Geer tube, the necks projected around the outside of the ...
Can have poor brightness, especially when most of the picture is white [5] Electro-magnetic radiation emission Can emit a small amount of X-ray radiation. Only emits non-ionizing radiation. [39] Emits strong radio frequency electromagnetic radiation [40] None, although control circuitry may emit radio interference Size Up to 43 in (1.1 m) [41]
The beam-index tube is a color television cathode ray tube (CRT) design, using phosphor stripes and active-feedback timing, rather than phosphor dots and a beam-shadowing mask as developed by RCA. Beam indexing offered much brighter pictures than shadow-mask CRTs, reducing power consumption, and as they used a single electron gun rather than ...
After the video detector, the video is amplified and sent to the sync separator and then to the picture tube. The audio signal goes to a 4.5 MHz amplifier. This amplifier prepares the signal for the 4.5 MHz detector. It then goes through a 4.5 MHz IF transformer to the detector. In television, there are 2 ways of detecting FM signals.