A masking technology invented by Sony to be used in monitors, that allows for a brighter image then a shadow mask. It is made of fine metal wires instead of a perferated metal plate to block stray electrons. A downside of the technology is that it usually has 2 fine horizontal lines in the middle of the screen created by the dampening wires.
In some CRTs, the aperture grille is a series of wires stretched vertically down the inside of the monitor to mask the beams from the electron guns at the back of the tube. In other types of monitors, this function falls to a perforated metal plate called a shadow mask. Some users prefer the image quality of Sony Trinitron monitors, which use an aperture grille; others notice the faint horizontal shadows cast by the grille's tensioning wires and prefer other shadow-mask designs.
a high-tension grill that permits more electrons to pass through to the screen in comparison to conventional shadow mask grilles used by other manufacturers
A set of vertical metal bars that directs the electron beam in a CRT so that it strikes only the phosphors of a desired color.
Aperture grille technology employs a series of thin, closely spaced vertical wires to isolate pixels horizontally. The pixels are separated vertically by the nature of the scan lines (beams) used to compose the image.
An array of vertical wires which act in a similar manner as a shadow mask. Their basic purpose is to permit the correct electron beam to strike its corresponding colour phosphor only. This results in crisp pixel definition, and superior colour brightness than is realized with more traditional designs. The aperture grille was first used by Sony in their Trinitron design.
An aperture grille (tension mask) is one of two major technologies used to manufacture cathode ray tube (CRT) televisions and computer displays; the other is shadow mask.