Posted on 04/02/2018 8:19:57 AM PDT by Oldpuppymax
If you've ever found your eyes tiring by the end of a movie in your home theatre – and it has nothing to do with the writing, acting, or production – you may want to look into something like a bias light.
I knew about bias lights once but over the years, and through several changes in TV's over the years, I had forgotten just how much a bias light can improve one's enjoyment. Back then, I had (among other TV's) a 57-inch CRT rear projector, but while watching it I noticed that the picture would tend to dazzle my eyes, and not in a good way.
The result was that, instead of being amazed by my old Sony XBR's fine 1080i (yes, it was a while ago!) picture, I found my eyes would become fatigued, especially if I kept the room illumination minimized – which was and still is my standard operating procedure when watching video in my home theatre.
You could turn on more room lights to combat that tiring dazzle, but that creates other problems. For example, depending where the lights are, they could reflect onto the screen, which isn't a good thing because you lose contrast (and black levels – contrast – is one of the most important parameters in a quality picture). It could also introduce glare.
The bottom line is that by "washing out" your TV's picture with external lighting, you aren't getting the most out of your TV purchase. Sure, you can read while the TV's on, but that kind of defeats the purpose of watching something.
Back in that CRT rear projection days, the solution was to put a special fluorescent light behind the TV, in my case a product from a company called CinemaQuest, whose Ideal-Lume bias light was...
(Excerpt) Read more at thecoachsteam.com ...
I liked Gallagher’s quote,
“There’s a button on the TV that says ‘Brightness’, but it doesn’t work.”
Back in tube days it was recommended to keep a small lamp shining off to the side of the TV.
My Sister sent me some glasses that fit over your glasses if you wear them. Sorta yellow, but that.s not noticable. They filter out the blue-white light. They’re great! Easy on the eyes. Work well in bright Sun and snow too.
There used to be an LCD TV, I can’t remember if it was Sony, Sharp, or someone else, that had a back light that lit up the wall around the perimeter of the TV with light, and changed the color based on the predominant colors in the TV scene.
I thought it was stoopid.
There's a button that says "on-off", and that works just fine, better than any "bias light".
Is this the same problem as going to a dark movie theater and watching a movie?
Is this the same problem as going to a dark movie theater and watching a movie?
No, but it will be now that movies are digital. Back in the film days you saw 24 complete images per second. With a TV, the image is scanned line by line. There is never a complete image on a TV screen.
Not to quibble (too much) but the largest Sony XBR CRT TV was a 40” monster that weighed in at 300+ lbs.
One sits on a friends dresser, and will be sold with the house when they move. Took four of us to lift it up while another pushed once we got it high enough to clear the top of the dresser.
A 57” CRT? Just bring a fork lift to the house.
“My Sister sent me some glasses that fit over your glasses if you wear them. Sorta yellow, but that.s not noticable. They filter out the blue-white light. They’re great! Easy on the eyes. Work well in bright Sun and snow too.”
great for extended computer work as well ...
“A 57” CRT? Just bring a fork lift to the house. “
rear projecting TVs were originally powered by small CRTs until DLP technology ...
https://en.wikipedia.org/wiki/Rear-projection_television
A lot of newer digital TVs don’t have a line by line scan like the old CRTs. They have buffers for each full image and they swap buffers for each image.
I don’t know if digital projection in theaters works like that or not.
The operative phrase was “rear projector.”
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