Read more about acquired methemoglobinemia, a condition that results in the formation of an abnormal form of hemoglobin. Learn more about the causes, symptoms, treatment, and diagnosis of acquired methemoglobinemia.
CRT display is the most commonly used form of visual displays, through it is getting gradually replaced with LCD and Plasma displays. A computer monitor using CRT display. In a CRT, an electron beam sweeps the display screen horizontally, one line at a time, gradually down the screen. A synchronization (sync) signal brings the beam back to the top row of the display. This type of scanning (line-by-line) is known as raster scan.
Fees are collected for the following CEDs (Covered Electronic Devices): 1  Televisions that contain cathode ray tubes, liquid crystal displays, or plasma screens. 2  Computer monitors that contain cathode ray tubes or use liquid crystal displays. 3  Laptop computers and Portable DVD players with liquid crystal displays.