picture tube [2]

Hollow glass tube in which video signals are converted into electron beams to produce pictures on the screen.

protective window

Front portion of the picture tube that covers the screen.

base

Terminal end of the picture tube that connects to outside circuits.

screen

Surface on which pictures are formed; it is covered with sensitive dots, which emit red, green or blue light when hit by electrons.

color selection filter

Perforated metal plate that directs each electron beam toward the sensitive parts of the screen corresponding to its color.

electron beam

All the negatively charged particles traveling in the same direction; their intensity varies with the video signal received.

neck

Narrow part of the picture tube that contains the electron gun.

electron gun

Device that emits electron beams toward the screen; there are beams for each of the primary colors, red, green and blue.

funnel

Flared rear portion of the picture tube.