Trintron colour picture tube
The Trintron or three in-line cathodes colour picture tube was developed by ‘SONY’ Corporation of Japan around 1970.
Overview of the Trinton Colour Picture Tube:
- It employs a single gun having three in-line cathodes.
- The three phosphor triads are arranged in vertical strips as in the P.I.L. tube.
- Each strip is only a few thousandth of a centimetre wide.
- A metal aperture grille like mask is provided very close to the screen.
- It has one vertical slot for each phosphor triad.
- The grille is easy to manufacture and has greater electron transparency as compared to both delta-gun and P.I.L. tubes.
- The beam and mask structure, together with constructional and focusing details of the Trintron are shown in Fig1.1.
- The three beams are bent by an electrostatic lens system and appear to emerge from the same point in the lens assembly.
Figure 1.1 Trintron (cathodes in-line) colour picture tube (a) gun structure (b) electron beams, vertical-striped three colour phosphor screen (c) constructional, focus and convergence details.