Aperture grille in close-up

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. Image File history File linksMetadata Aperture_grille_closeup. ... Image File history File linksMetadata Aperture_grille_closeup. ... Cathode ray tube employing electromagnetic focus and deflection Cutaway rendering of a color CRT Electron guns Electron beams Focusing coils Deflection coils Anode connection Mask for separating beams for red, green, and blue part of displayed image Phosphor layer with red, green, and blue zones Close-up of the phosphor... A monitor is an interface between the computer and the operator. ... The shadow mask is one of two major technologies used to manufacture cathode ray tube (CRT) televisions and computer displays that produce color images (the other is aperture grille). ...

Fine vertical wires behind the front glass of the display screen separate the different colors of phosphors into strips. Depending on the size of the display, one or two horizontal stabilizing wires are also used, and may be visible as fine lines across the face of the screen, providing the easiest way to distinguish aperture grille and shadow mask displays at a glance. Additionally, aperture grille displays tend to be vertically flat and are often horizontally flat as well, while shadow mask displays usually have a spherical curvature. A phosphor is a substance that can exhibit the phenomenon of fluorescence (glowing during absorption of radiation of another kind) or phosphorescence (sustained glowing without further stimulus). ... The intuitive idea of flatness is important in several fields. ... For other uses, see sphere (disambiguation). ... Curvature refers to a number of loosely related concepts in different areas of geometry. ...

Comparison between shadow mask (left) and aperture grille (right)

The first patented aperture grille televisions were manufactured by Sony in the late 1960s under the Trinitron brand name, which the company carried over to its line of CRT computer monitors. Subsequent designs, either licensed from Sony or manufactured after the patent's expiration, tend to use the -tron suffix, such as Mitsubishi's DiamondTron and ViewSonic's SonicTron. Image File history File linksMetadata Download high-resolution version (2000x960, 442 KB) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File linksMetadata Download high-resolution version (2000x960, 442 KB) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... A patent is a set of exclusive rights granted by a state to a patentee (the inventor or assignee) for a fixed period of time in exchange for the regulated, public disclosure of certain details of a device, method, process or composition of matter (substance) (known as an invention) which... To meet Wikipedias quality standards, this article or section may require cleanup. ... Dr. Seuss Jean Shepherd Ringo Starr John Steinbeck Gloria Steinem Tom Stoppard Hunter S. Thompson Gore Vidal Peter Vincent Kurt Vonnegut Andy Warhol Alan Watts Bob Weir Brian Wilson Tom Wolfe There were six Olympics held during the decade. ... Picture of a Dell-branded Sony Trinitron, still bearing the Triniton logo. ... Mitsubishi Logo The Mitsubishi Group ), Mitsubishi Group of Companies, or Mitsubishi Companies, all refer to a large grouping of independently operated Japanese companies which share the Mitsubishi brand name. ... ViewSonic is a manufacturer and provider of visual technology, specifically CRT monitors, LCD displays, projectors, plasma displays, HDTV technology, and mobile products, including tablet PCs and wireless monitors. ...

While many considered aperture grille technology to produce superior images, advances in shadow mask and hybrid technologies since the 1990s have made people's preferences more a matter of personal choice or specific application. The arrival of inexpensive liquid crystal display (LCD) monitors and other flat-screen designs now challenges both aperture grille and shadow mask CRTs' long reign as the technology behind the screens we look at. This article is 150 kilobytes or more in size. ... Reflective twisted nematic liquid crystal display. ...

Aperture grille in close-up, showing the letter "e" from a teletext page

One drawback to the use of aperture grille monitors is the faint lines that appear at one third and two thirds of the screens' height (often at just one location—usually 2/3rds—on smaller displays). These lines are caused by two thin wires that run perpendicular to the grille and are used to maintain equal spacing between the vertical wires of the grille. Enhancements of the technology have reduced the visibility of these lines so that they are almost unnoticeable on modern displays. Users who do notice the faint traces tend to quickly become accustomed to the lines, and soon end up ignoring them. Image File history File linksMetadata Download high-resolution version (818x1200, 267 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Cathode ray tube Aperture grille Metadata This file contains additional information, probably added from the digital camera or... Image File history File linksMetadata Download high-resolution version (818x1200, 267 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Cathode ray tube Aperture grille Metadata This file contains additional information, probably added from the digital camera or...

External links

• Why the lines on my monitor?
• Aperture grille details