damn, I have to be at a wedding in an hour so I can't answer your question properly....I'll do what I can to explain it for you when I get back on monday.

In a nutshell though, RGB is a graphical standard...its a way of keeping uniformity. Sorry, gotta shoot....

and it isn't a laser.

..the Devil will find work for idle hands to do; i stole and I lied, and why? because you asked me to..

There are two sets of primary colours from which you can create any other. If you are using pigments, then the colours are magenta, cyan and yellow, but for light they are red, green and blue. So your science lesson wasn't wrong, it just wasn't complete. The reason they're different is because shining a light adds a colour, whereas pigments subtract them - they're useful in different ways. Like printers. You can get RGB printers, but you can also get CMYK ones (where K stands for Black)

In fact, RGB are the main colours in additive colour light mixing. There are others like CMY as well for different things, and there is additive and subtractive colour mixing as well (yup - coloured stuff = subtractive if i remember rightly). Printers use subtractive i think to make colour. Heck - if i still had my uni notes i could tell you exactly how it all works, but a stale mind forgets too much (ie, haven't used colour knowledge at all for years so have forgotten nearly all i knew!).

Taw may be able to tell you more, but it used to be a "powder" that was hit by photons i think it was, and these excited electrons into energy levels. When they returned to a more stable state, they gave off energy in the form of light that you can see...........but like i said, its very shaky knowledge. Hm - where did i put my notes. I am sure that modern day screens don't use a tube anymore....but really haven't been a good student by paying attention

Edited by - Chips on 6/12/2004 3:09:07 AM

Edited by - Chips on 6/12/2004 3:09:32 AM

Taw as I said it was 3 years ago, and I'm not very awake
I got the right stuff noe
Most screens are based on CRT tech
the cathode ray tupe direct a beam of electrodes to the back of the screen. The back of the screen is coated with phosphor dots.
When the beam of electrons hit the dot of phosphor it lights up and glows. This dots make up the picture we see and is called a pixel which is short for picture element
Each pixel in a colour display is made up of 3 dots one red one blue and one green.

Nowadays LCD is used, I think only flatscreens are LCD.
Apparently its more difficult to create colour displayes with LCD two options excist: Passive matrix and active matrix(also called TFT Thin Film Transistors)
But all we needed to know was that TFT was better

LCD is also much better for the eyes

This was the most interesting part of computerstudy that we did in the past three years




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Forum Systems A must read

Edited by - sycho_warrior on 6/12/2004 3:21:15 AM

Well, it looks like your question has been answered. Any other questions sw?

hmm I dont think so, I just scanned through my books the other day for exam, but didnt really see anything else.

I'll make sure to ask
maybe I should read thro the books again, its the only school books I almost like to read

Sounds good. Just don't ask me to explain why 64-bit is better than 32-bit; three times on this forum is more than enough!

That I know sth to do with more data that can be transferred etc depending on what you are talking about that is

Edited by - sycho_warrior on 6/12/2004 11:49:13 AM

A slight variant question. Is LCD actually better on you eyes than a standard monitor? I know my eyes have gotten really bad in the last few years to the point, I have to have glasses to see the screen.
If LCD is better, I may see about investing in an LCD in the near future.

well..yes because:
Normal monitors has to be refreshed the whole time, altough you cannot see it, a normal monitor is constantly flickering.
LCD doesnt flicker because it doesnt need to be refreshed like CRT screens, thus less strain on the eyes
or something like that

I am not your stepping stone to success!
Forum Systems A must read

Alright I'll use my somewhat decent knowledge of computers to explain the LCD's.
First of all there are two different types as listed above.

Passive lcd's are just that. Pixels are driven off the glass by matrix drivers.

TFT - thin film transistor. This is active matrix, where there is a transistor per pixel actually on the glass itself. Hence why it costs a lot more than passive LCD.

The reason that they are better on the eyes is the pixels do not change until they have to change to a different color. Hence there is no refresh rate as in regular moniters where most of us are probably running a 60hz refresh rate. I've got mine bumped up to 90hz but my moniter is also a little more high end then your ones.

Someone correct me if im wrong on the refresh rate. This is what I thought but I was thinking somewhere I had read that the passive lcd's do have a type of refresh rate on them, but they are still better the convential moniters.

Edited by - Matt8705 on 6/12/2004 8:05:17 AM

"most of us are probably running a 60hz refresh rate"

if you've a 17" or higher and you're running in 1024X768 res. you should have a refresh rate of 75mhz if your graphics adaptor allows (trust me)

..the Devil will find work for idle hands to do; i stole and I lied, and why? because you asked me to..

I have a 17" at this time, E-Machine. Was at 60, set to 72 now, no change noticed, will there be anything to notice?
1024 x 768 32bit


Edited by - Finalday on 6/12/2004 11:47:15 AM