what is television brightness?

Booker Warlick: Television uses CRT tube (Cathode Ray tube) to display images.Basically a metal filament is electrically heated which releases electrons (Thermionic emission)These electrons are converged into a fine beam by large positive charges and the is made to sweep constantly on the screen which is usually covered with fluorescent salt. Upon impact on the screen, the electrons produces bright spots....so to answer your question, television brightness depends on the amount of electrons bouncing off the screen. The greater the amount the brighter image you get....Show more

Ollie Hamiel: Katods U back side silver screen....so i don't know...

Shena Etulain: ("BRIGHTNESS: Brightness is the overall, or average, intensity of illumination, and it determines the background level in the reproduced picture. Individual picture elements can vary above and below this average brightness level. Brightness on the screen depends on the amount of high voltage for the pictu! re tube and its dc bias in the grid-cathode circuit. In television receivers, the brightness control varies the dc bias of the picture tube.The fluorescent screen of the picture tube is illuminated on only one small spot at a time. Thus the brightness of the complete picture is much less than the actual spot illumination. The bigger the screen is, the more light is needed from the spot to produce enough brightness.------------------------CONTRAST: By contrast we mean the difference in intensity between black parts and white parts of the reproduced picture. .... The amount of ac video signal determines the contrast of the reproduced picture. ....")-----------------------Basic Television and Video Systemsby Bernard GrobISBN: 0-07-024933-4page 34------------------------Best regards...Show more

Sharri Scalley: Your television set is surely ancient...And with the appearance of high Definition television lower than a 12 months away, I think it could be in your excellent in! terest to Re-invest your cash into a new tv set.... When you b! uy USED, be certain the HD brand or the phrases high Definition is on the entrance of the tv set..... I don't think you wish to have to position any money into that television set for restore.....