Trintron tube Presentation
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Trintron tube Presentation
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Trintron tube Presentation
- 1. Department of Electronics and Telecommunication Engineering Submitted By:- Ashish Pandey (30) 3rd Year | 5th Semester | Section ‘C’ Subject Television Engineering Guided By:- Prof. Bhushan Vidhale G.H.R.C.E, Nagpur. TAE III Technical Presentation TRINITRON TUBE
- 2. Introduction •The Trinitron or three in-line cathodes colour picture tube was developed by ‘SONY’ Corporation of Japan around 1970. •Trinitron signified the technology that Sony had inside its screen, and the logo became a mark of quality. •The Trinitron design incorporates two unique features: the single-gun three-cathode picture tube, and the vertically aligned aperture grille.
- 3. Construction • This simplifies constructional problems since only one electron gun assembly is to be accommodated. • The three phosphor triads are arranged in vertical strips. • Each strip is only a few thousand 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.
- 4. 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 Trinitron shown in Figure.
- 5. • The single gun consists of a long-necked tube with a single electrode at its base, flaring out into a horizontally-aligned rectangular shape with three vertically-aligned 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 with vertical slots cut in it. Working
- 6. • 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 coloured 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 colour, much as does a shadow mask. However, unlike a shadow mask, there are essentially no obstructions along each entire phosphor stripe
- 7. Advantages • Improved Vertical Resolution. • Controls are only 6 against 12 in Delta gun and PIL Picture Tube. • Sharper Focus and Brightest Picture. • No Problem of convergence adjustment during Servicing. • Great Transparency for electron beam is about 80% against 20% of delta gun and 50% of PIL Picture Tube.
- 8. References • https://en.wikipedia.org/wiki/Trinitron • Television Engineering and Video Systems By R G Gupta. • Electronics Engineer's Reference Book edited by L. W. Turner. • Monochrome and Colour Television - R.R.Gulati.