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JunkFood
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Registered: 10/02/06
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Is my CRT frying my brain?
#7536958 - 10/19/07 07:57 PM (16 years, 3 months ago) |
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Yeah, I know I could do some Googling on this, but I'd come up with millions of contradictory results.
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trendal
J♠



Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada
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Re: Is my CRT frying my brain? [Re: JunkFood]
#7537000 - 10/19/07 08:09 PM (16 years, 3 months ago) |
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No.
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Once, men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
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Visionary Tools



Registered: 06/23/07
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Re: Is my CRT frying my brain? [Re: trendal]
#7537307 - 10/19/07 09:14 PM (16 years, 3 months ago) |
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Old CRT units do emit Xrays as well as normal visible light. But the amounts are trace. It's the flickering that's giving you a headache.
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JunkFood
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Registered: 10/02/06
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Don't have a headache. The thing is: If I stayed as close to my TV as I do my monitor, wouldn't my brain be fried? Is there a big difference between my monitor and a TV?
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trendal
J♠



Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada
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Old CRT units do emit Xrays as well as normal visible light.
Right, but as those displays are all black & white and were around before computers...you aren't too likely to find a working model anywhere 
All modern CRT's, and anything made in at least the last 30 years, have significant x-ray protection circuitry - both passive and active. The CRT voltage is actively monitored - should it ever reach the voltages where x-ray production occurs (75+kV) it will blank the screen. The soft x-rays that occur at lower voltages are completely blocked by the front of the CRT (several inches thick).
The only place that might be exposed to some soft x-rays is the back of the CRT - not the front. The x-rays would be very soft.
See this: http://www.repairfaq.org/samnew/tvfaq/tvxrayoem.htm
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Once, men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
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sherm
sherman


Registered: 10/02/03
Posts: 20,498
Loc: Euthanasia
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Re: Is my CRT frying my brain? [Re: JunkFood]
#7537538 - 10/19/07 10:38 PM (16 years, 3 months ago) |
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i find that the crts are harder on my eyes, sometimes making my brain feel fried due to strain. My eyes have an easier time looking at an lcd for extended periods.
If you're asking if your crt is frying your brain because your eyes hurt or headaches you might want to try an lcd.
I believe that i actually lowered my vision from 20/20 to 20/40 by staring at a computer screen over a period of about 3 years. I wouldn't necessarily blame this on the crt itself, but maybe bad vision habits when looking at a crt. Either way, the lcd is easier on my eyes and doesn't feel like its killing me.
-------------------- shroomery. not even once.
    
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Visionary Tools



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Re: Is my CRT frying my brain? [Re: trendal]
#7538348 - 10/20/07 06:20 AM (16 years, 3 months ago) |
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I suspected it was not powerful enough to be above background radiation. Either way, it won't fry your brain. The only deleterious effect of being so close is that at that distance, it's very bright. Eye strain is caused by a perceptible flicker. I recommend nothing less than 75Hz.
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trendal
J♠



Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada
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I set mine to 75hz and I don't notice any flicker (I do at 60hz). I actually prefer a CRT over a LCD for gaming...can't beat the clarity and brightness of a CRT! Also, LCD's can't display pure black.
sherm: I've been using a computer, and doing so heavily, for over 20 years now. Of those 20 years, I have probably spent close to 50,000 hours on a computer. I just had my eyes tested last year, and I came back with 20/20 vision...so you can't say that computer monitors are bad for your vision.
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Once, men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
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JunkFood
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Re: Is my CRT frying my brain? [Re: trendal]
#7539034 - 10/20/07 11:50 AM (16 years, 3 months ago) |
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A clear screened (as opposed to a frosty screened) LCD is the same thing as a CRT with a glass screen.
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sherm
sherman


Registered: 10/02/03
Posts: 20,498
Loc: Euthanasia
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Re: Is my CRT frying my brain? [Re: trendal]
#7539035 - 10/20/07 11:50 AM (16 years, 3 months ago) |
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i didn't say that computer monitors are bad for your vision, i said that incorrect vision habits are. I was just mentioning that a crt may be more difficult to look at for extended periods, which may lead a person towards incorrect vision habits ( straining, squinting).
after learning to notice my own bad vision habits, my vision has began to slowly improve. I should be back to 20/20 at some point.
-------------------- shroomery. not even once.
    
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trendal
J♠



Registered: 04/17/01
Posts: 20,815
Loc: Ontario, Canada
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Re: Is my CRT frying my brain? [Re: JunkFood]
#7539511 - 10/20/07 02:31 PM (16 years, 3 months ago) |
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Quote:
Although LCDs typically have more vibrant images and better "real-world" contrast ratios (the ability to maintain contrast and variation of color in bright environments) than CRTs, they do have lower contrast ratios than CRTs in terms of how deep their blacks are. A contrast ratio is the difference between a completely on (white) and off (black) pixel, and LCDs can have "backlight bleed" where light (usually seen around corners of the screen) leaks out and turns black into gray. Nowadays the very best LCDs actually surpass the best plasmas in terms of delivering a deep black, but most LCDs still lag behind.
http://en.wikipedia.org/wiki/Liquid_crystal_display#Drawbacks
They are not the same thing at all. They each have their merits and flaws, and each in different areas.
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Once, men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
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