|Originally posted by xrox
LOL - what are you twelve?
don't worry, no offence taken.....
I guess I and everyone else in the display industry is completely wrong. You should do a lecture circuit to enlighten us all.......LOL :) (kidding)
Look I'm not here to make you look stupid. I just disagree, backed by a large majority of scientists.......:)
You see I'm not blabbing about stuff I "THINK" I know. And if I do, I put the words "I think" in front of them. The only thing I know for sure is what scientists teach me. If they are wrong then it is my fault for listening. I'm not here to pad my ego by flexing my knowledge but rather to learn even more than what I am taught at work and in the industry. While there is not enough science here to keep me here daily it does crop up enough to make me visit as much as possible.
You should visit the Flat Panel forum here and ask Rogo to give you a lesson on "fixed pixel" devices (both business and science)-he's the man.
BTW, I think I know what you are thinking. That because the dots "you count" on the screen are fixed that it is a fixed pixel display. But that is not what "fixed pixel" means. Look up the definition of "fixed pixel" and see if CRT is ever mentioned except as an opposite. Then ask yourself why you are the only one who thinks that is wrong?
In fact go to your browser search engine and type - CRT "fixed pixel"
LOL - I agree it does make an interesting discussion.
apart from 'resolution' being a totally misused term (industry just accepts it)
'digital-CRT' is also misused since there is no such thing.
but you may think 'digital' is misued in PDP and LCD because the discrete pixel signal must be converted to DC current to fire the cells but you are mistaken. Once a signal is processed into discrete packets of digital information for each transistor it is considered a true digital display because the signal for each pixel has been processed digitally. Only possible in a "FIXED PIXEL" display!
The same cannot be said for CRT
Yes LCD and Plasma emit light from analog current signals but the signal is processed digitally right down to the discrete pixel level.
I once argued that all displays are analog on the sane basis and was shown the light by the OLED and LCD scientists here at work.
Not 12 at all just stating a fact. And I dont know who it is that your are studying under but I would be more than willing to discuss it with them as well. Perhaps I am missing it, dont think so tho.
Fixed pixel as a term has no set definition. I know it has been used with misleading definitions. I will be using "fixed-pixel" device below to segregate based on your beliefs(excluding CRTs.)
Lets start at the beginning, because those phosphor triads dont move means it is a fixed pixel device. That is the entire point. Perhaps you could more clearly explain how a CRT device has non-fixed pixels? Explain to me how they move around change size shape or number? AFAIK I know they dont. You can compromise and send various signals to a CRT like any other device, doesnt mean its a good idea.
What I believe you are confusing is the actual output and how it is used. There is no manipulation that can be done to a CRT that cant be done to any other device, so CRTs have no unique characteristics there. Unless youre trying to hang your hat on complete analog signal path which is moot in this day and age anyway(you could build an analog version of most of these "fixed-pixel" devices btw, but that would be a step backward.)
Lets run them down so maybe you can explain otherwise.
-Do CRTs and all "fixed-pixel" devices have a maximum definable resolution? Yes
-Can you feed CRTs and other "fixed-pixel" devices various line rates? Yes
-Is using something other than CRTs or any "fixed-pixel" device's exact actual resolution a compromise in some way? Yes
-(Nothing to do with our point, just gonna bounce the rubble)Can a specific pixel on a CRT screen be digitally addressed? Yes if the electronics are exactly in sync with the screen, which is very doable.
-Are there horizontal input resolution restictions for CRTs or any "fixed-pixel" device as long as appropriately scaled? Nope
-Do CRTs and other "fixed-pixel" devices scale various inputs for display? Yes, different electronics but the same effect.
So that we have clear talking points, and so that you can explain why a CRT is a more variable resolution device lets cover those above. I am seeing no significant differences between output or pixel address in CRT vs any other "fixed-pixel" device. Maybe I'm confused or havent studied enough under "industry insiders" ;) .
Unless you can prove CRT phosphors move or change number or size, its a fixed pixel device. None of the other behavior driving the output is unique and exclusive to CRTs, therefore moot.Seperate issue, pixel address.
On the pixel address issue lets start at the result and work back ok?
Is light output digital or analog? analog
Is electricty digital or analog? analog
Is a phosphor glowing digital or analog? analog
Is the location of the pixel to perform the above digital or analog? I could argue either way, but lets call it digital.
So lets break it down by device.
Where does digital end for a:
"digital" CRT? The signal steam in the gun
Plasma? the signal to each pixel block
LCD? light output from the LCD panel
DLP? light output from the DLP chip
LCoS? light output from the LCoS panel
Are any of the above points a significant departure from CRT as a base? No, especially in the case of a plasma. Plasmas are very similar in their display production to CRTs. SED will be the same. All modern display devices have both digital and analog components now.