Originally Posted by basil lambri
I would like to add to this discussion by saying something that I have learned. I read in a book recently that on those old CRT-type TVs the pixels that they used, dot-type (using the so-called "delta" system) or using those stripes from the 1970s on, those pixels created some distortion of the color. That was something I didn't know. They thought that they could fix that there was some color distortion in the pixels-and other things also-by changing the dot system to the stripes. It is believed that the stripes didn't change that distortion problem.
You are referring to moire
, although doing an errant job at describing it. Moire is a very simple effect that occurs when two patterns overlay across one another. A CRT has a grid that the electron gun fires through in an interlaced pattern, and certain things that are filmed may have similar, small patterns, like pinstripe clothing, hatching on jackets, shirts, etc. This is not a serious problem when it comes to television viewing, but it can make the pattern that you are attempting to appear to lose detail, lost in the interference. Trinitron CRTs actually DO help a great deal to solve this kind of interference. Because there are NO horizontal wires, they completely eliminate any possibility of vertical moire patterns. I don't think that moire was such a problem with CRT that Trinitron was invented in order to tackle it. Trinitron's strength from its debut was the brighter screen, indeed, with only vertical wires, it can allow for a much brighter image than the smaller slots of a shadow mask. That it eliminates vertical moire is an accidental plus.
And I don't believe that LCD/LED or plasma TVs really have that problem. They also use their own pixels but they are different maybe. And that you could even have HDTV with those CRT TVs, and that problem would still happen even with HD, maybe that shouldn't be happening.
Moire can happen any time there are overlaying patterns, and it can even happen with HD broadcasts if done in 1080i. The chances of this are much reduced with a higher resolution, but apart from an odd looking, moving pattern on someone's sweater, this is not the biggest issue facing television broadcasts.
Those well-known problems that plasma and LCD/LED TVs can have with good black or correct motion have almost been overcome nowadays.
See Elix's pics above.
It seems to me that manufacturers have stopped making CRT TVs and they make LCD/LED, plasma, and others, is not simply because CRTs are heavy and you need 2 or 3 people to carry them. Maybe the manufacturers thought and decided that that is what people should have, plasma or LCD and some other new technologies, because they are good TVs. They decided that you don't need CRT.
They decided that it is cheaper to make a thing that only needs to weigh 30 pounds or less, as opposed to up to 300 pounds for the same screen size. And honestly, it is. With the same area to store your wares, you can simply fit more items of a smaller dimension. When transporting small or short distances, you can move more televisions with fewer people if the thing is smaller and lighter. You have decided that these televisions are good enough, with any of their faults, for these little conveniences. They decided that the conveniences trump any quality concerns, because those conveniences save them money. Any dollar they save is another dollar they have.
Anyway, I would say that I own a good LED TV and I really like it.
See what I mean?