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Monitor Basics - LCD vs. CRT

Herbal V wrote in with a little article discussing the differences between LCD and CRT. Briefly summarizes all the major issues (Price, Refresh Rate etc). More of a beginner level piece, but as LCD prices are dropping like rocks, it's good to be aware.

15 of 521 comments (clear)

  1. 2 Years On, On LCD by ackthpt · · Score: 4, Interesting
    2 Years and I still love my Samsung Synchmaster 172t, though my only gripe is it's TOO BRIGHT! Even on the lowest settings I think I'm getting some sort of tan. Manufacturers may wish to consider some users sit in dark rooms, plugging away at nefarious^H^H^H^H^Hworking very diligently on upstanding fine projects their mothers would be proud of!

    Thing even came with a wall mount, too bad I live in an apartment (though toothpaste does have its other uses...)

    Size is great, too, because a 17" LCD is almost as big as a 19" CRT :-)

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  2. CRT Trash Problem by blahbooboo · · Score: 2, Interesting

    Well, LCDs are clearly on the way out. I just hope all those CRTs will be recycled (including TVs) and not end up in our water supply etc. How do my fellow Slashdotters recycle their old CRTs?

  3. What drops? by Morgahastu · · Score: 3, Interesting

    Everyone has been talking about LCD price drops for the past 2 years but it just has not happened. I've been in the market to buy an LCD monitor for the past 2 years and I have not seen any significant drop.

    With all the news of companies dropping plasma, more LCD plants being opened, production being increased, technology improving, why hasn't the price of LCD monitors been cut in half?

    I think it's because it has the cool factor that lets the companies sell it at whatever price they want.

    Look at the quality of LCDs in some laptop and how cheap they are. OFten times a comparable LCD for a Pc would be more expensive than he laptop WITH the lcd.

    1. Re:What drops? by Anonymous Coward · · Score: 1, Interesting

      Two years ago, a 20" LCD had a native resolution of 1280x1024, 30ms response time and cost between $1500-$2000. You can now get a 20" Dell 2001FP with a native resolution of 1600x1200 and a 16ms response time for around $700.

      What do you mean "what drops"?

    2. Re:What drops? by Civil_Disobedient · · Score: 2, Interesting

      I've been in the market to buy an LCD monitor for the past 2 years and I have not seen any significant drop.

      The price for craptacular 1280x1024 displays has been dropping, but if you actually want to use those 19 inches of screen real estate with, say, a higher resolution (say, 1600x1280) you're still looking at just under a grand. Which is absurd. Most good CRT's go up to 2048x1536, and can down-res when needed (higher framerates for games, for instance), yet cost half that.

  4. Response time by Monkey+Angst · · Score: 5, Interesting

    The article only briefly mentions response time -- doesn't explain it. Response time was the reason I returned the LCD I bought and went back to my CRT -- DVD playback was awful. I imagine there are people who don't notice it, just as there are people who are more sensitive to lower CRT refresh rates, but it was hellish for me.

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  5. Health Issues by Drexus · · Score: 5, Interesting

    It's funny, the main reason why I dumped 3 of my 20" Sun monitors for an Apple Cinema Display was the health issues. Sure, we have herd all the stories about special cameras that can read the material on your CRT through walls (and the person sitting in front of it), but that didn't stop me. No, I went ahead and set myself up with enough radiation to cook lunch. 5 months later, I found myself having trouble shaking off common colds, and my appetite went down hill. People should be aware of the health issues, not just specs.

    1. Re:Health Issues by .orvp · · Score: 5, Interesting

      I switched to an LCD for health reasons as well, just a different one. Mine dealt with the refresh of a CRT. When in college, I had a 19" CRT that I would program on. At night, I was having a hard time falling to sleep, and so when I couldn't sleep, I went back to programing. This really messed up my sleep patern to the point I was at a 26 hour day (where I could only fall asleep every 26 hours). That doesn't really help when trying to go to classes.

      After a while, I would just fall asleep at random points because of sleep deprivation, missing classes and all. When I finally went to a sleep doctor, I learned it could be from the refresh of my CRT. I then moved to an LCD and haven't had that problem. I can now sleep 10 minutes after getting of the computer where as before I would need to wait 90 minutes for my brain to wind down.

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  6. Don't forget ClearType on your LCD by Lev13than · · Score: 5, Interesting

    Kind of OT, but important - if you are running XP with an LCD screen, don't forget to turn on ClearType. ClearType dramatically improves the quality of text displayed on screen, to the point where my work laptop almost looks as good as my OS X box w/CRT at home.

    ClearType takes advantage of the fact that LCDs make coloured pixels out of three adjacent sub-pixels (usually R-G-B), rather than a CRT which focuses all three of its guns on the same spot. By varying the intensity of the three colours in each pixel, ClearType effectively triples the horizontal resolution of type. The trade-off is some slight colour-banding in small fonts, but the payoff is a much more readable screen.

    I stumbled across the settings by accident. With the increasing popularity of LCDs, I'm surprised that Microsoft doesn't promote it more.

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    1. Re:Don't forget ClearType on your LCD by TheRaven64 · · Score: 3, Interesting

      I don't know if this is true of Windows, but when you take a screen shot in OS X it stores the sub-pixel anti-aliasing in the screen shot. It's quite interesting to zoom in so that a single character fills the screen, and see how it works.

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    2. Re:Don't forget ClearType on your LCD by MrP-(at+work) · · Score: 2, Interesting

      I think the problem is that people don't give it enough time. When I first got my LCD I turned it on.. And hated it.. But I lived with it for a few hours.. Now my eyes hurt when I'm at a PC without it turned on.

      The fact is, it's better for your eyes to have it on. I get bad headaches when it's off and I'm reading a lot (same applies to reading on a CRT.. I can never go back to CRT.. But I also hated my LCD for a few hours when I first tried it, now I can't live without it)

      You just need time to get used to it, it doesn't looked blurred anymore to me, it looks perfect.

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    3. Re:Don't forget ClearType on your LCD by emurphy42 · · Score: 2, Interesting

      The same thing works in Windows and Linux.

      I've tried the following:

      1) Linux + (normally TFT, occasionally CRT) + (grayscale anti-aliasing "Best Shapes" vs RGB sub-pixel anti-aliasing)

      2) Windows + (normally LCD, sometimes CRT) + (ClearType vs their older anti-aliasing vs grc.com's sub-pixel demo)

      On Windows, ClearType is mostly better, but worse in a few parts; grc.com's demo is just lousy, even on an LCD, and even after tweaking all the options. On Linux, grayscale is slightly better than ClearType, RGB sub-pixel is slightly worse. Monitor type doesn't seem to make much difference to any of it.

      As usual, YMMV, especially since (a) I have lousy vision in the first place and (b) I haven't really carefully observed how monitor type affects things.

  7. Fluffy comparison by Mundocani · · Score: 2, Interesting

    I love LCDs myself and have replaced all of my monitors with LCD displays, but even to me this 'comparison' reads more like a fanboy article than an objective comparison.

    CRTs certainly win out when it comes to contrast, yet the article only begrudgingly says that CRTs "may still have the edge". "May"? They absolutely do rule for contrast. When the electron gun turns off on a CRT the screen is black. On an LCD it's dark gray.

    I believe CRTs also win for refresh/framerate. The 'reviewer' relies on manufacturer specs to evaluate transition times. Are these the same manufacturers who used to tell us that their 15" monitors were 17"? Or the same ones who would use inappropriate contrast tests in order to claim huge ratios? It's true that LCDs don't flicker, but a fast refresh CRT doesn't flicker either and the CRT can switch images very quickly. The best LCDs that I've seen are still inferior in this regard. I'd prefer to see independent testing to validate these claims of 16ms switching times.

    Again, I love my LCDs and wouldn't trade them even though Doom III does smear a bit when I pan around. I love the low power consumption and I love the ease on my eyes, but it still doesn't change the fact that this article is just some fanboy fluff piece.

  8. Old price issue by Anonymous Coward · · Score: 1, Interesting
    You know, I would LOVE to switch to an LCD comparable to my 21" trinitron. It would be wonderful to do it but the main issue is $$$. Over here in NZ, even with my dealer buy prices, I'm still looking at 1000's of dollars to even come close to the same size and resolution as this monitor can put out. Flicker isn't really a problem at the moment (my refresh is not running below 85Hz), the size isn't really an issue either (taking up about the same footprint as a 17" Philips 107B), but eyestrain is getting to be due to the fact that this thing is just too damn bright. What I would like to see is the following:


    1 A drop in LCD prices, and I mean significant (who wouldn't)
    2 Quicker response times (for people who like to watch DVDs or play games)
    3 A change in number 2 should NOT change number 1 exponentially
    4 KISS method of engineering. Worry about the DISPLAY, not what kind of speakers you can slap in the case and how many USB ports you can mount on the thing.
    5 Digital and Analogue ports on ALL LCDs. Let the buyer decide which one they would like to use.

  9. Re:Bitching the LCDs, continued by RWerp · · Score: 2, Interesting

    The author is also a bit wrong in writing that the brighter the monitor, the better. Actually, some LCD monitors can be just too bright. You have to remember that LCD works by blocking light generated by lamps, so if the lamps are too bright, you won't block enough light to make black appear really black (it is especially visible in darkened room). Another caveat is that LCDs perform worse at representing a whole spectrum of colors (they're worse at representing warm colors). And that modern LCDs often do not show full 16.4 million RGB spectrum, only a subset of it and interpolate inbetween, which makes gradients worse.
    Having said that, I wouldn't give back my 17" LCD for any CRT, my eyes are too precious for me.

    I bought a model that was reviewed on newegg.com by umpteen people and many said they had no dead pixels.

    I tend to ignore such reviews. First of all, I have no guarantee that shop owners do not edit/cut out bad reviews. Second, a sizeable chunk of the reviews is written like "Hey, I just bought it 4 hours ago and it looks GREAT!!!! No more headaches and the fonts look so sharp!! Whopeee!". Sorry, this is not my idea of a noteworthy review.

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