Editing Trinitron (section)

===Basic concept===
The Trinitron design incorporates two unique features: the single-gun three-cathode picture tube, and the vertically aligned [[aperture grille]].

The single gun consists of a long-necked tube with a single electrode{{dubious|By definition and electronic gun consists of multiple electrodes|date=December 2017}} at its base, flaring out into a horizontally-aligned rectangular shape with three rectangular cathodes inside. Each cathode is fed the amplified signal from one of the decoded RGB signals.

The electrons from the cathodes are all aimed toward a single point at the back of the screen where they hit the aperture grille, a steel sheet{{dubious|It has already been ascertained that an array of fine wires is used, not a steel sheet|date=December 2017}} with vertical slots cut in it. Due to the slight separation of the cathodes at the back of the tube, the three beams approach the grille at slightly different angles. When they pass through the grille they retain this angle, hitting their individual colored phosphors that are deposited in vertical stripes on the inside of the faceplate. The main purpose of the grille is to ensure that each beam strikes only the phosphor stripes for its color, much as does a shadow mask. However, unlike a shadow mask, there are essentially no obstructions along each entire phosphor stripe. Larger CRTs have a few horizontal stabilizing wires part way between top and bottom.