Flat-panel plasma screens are new and extraordinarily costly. Of course, don't forget small television sets. Portable hand-held televisions are still around and have enhanced features from when they were first introduced to the world. New small color LCD screens have never looked better. A comb filter of any television separates these two elements and fine-tunes them.
Every television set has a comb filter.
The quality and coloring of your television display depends on what type of comb filter you have. Weak or damaged comb filters result in rainbow swirls and crawling dots that tend to appear where patches of different colors meet. Better model television sets will have a 2 or 3-line digital comb filter or the enhanced 3D digital comb filter. Look for either of these comb filters and you're bound to view distortion-free colors. A CRT was used in the very first television and is still used today.