What 3D technology is used in 3D vision glasses? why is it too dark?
I am planning to buy 3D Vision but have read elsewhere on the internet that the glasses are too dark.

My question is, is the 3D technology used in 3D Vision glasses different from those used in Sony or LG glasses? What exactly is the technology? I have tried Sony and LG glasses and they are not dark at all.

Thank you. /thumbup.gif' class='bbc_emoticon' alt=':thumbup:' />
I am planning to buy 3D Vision but have read elsewhere on the internet that the glasses are too dark.



My question is, is the 3D technology used in 3D Vision glasses different from those used in Sony or LG glasses? What exactly is the technology? I have tried Sony and LG glasses and they are not dark at all.



Thank you. /thumbup.gif' class='bbc_emoticon' alt=':thumbup:' />

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#1
Posted 09/09/2011 03:10 AM   
Most 3d glasses work the same way they use two layers of polarizing material, with liquid crystal between. The liquid crystal acts as a 1/4 wave retarded effectively rotating the polarization of the incoming light by 90 degrees when a signal is applied making the glasses opaque.
You lose the light from the polarizing layers when the glasses are "clear".

The sony glasses are slightly different, they rely on the light from the LCD already being polarized, and only have one layer of polarizing material in the glasses and a layer of liquid crystal, so the glasses do not go completely opaque but instead just block the polarized light from the display when a signal is applied. This means they block less light when they are clear and appear less "dark", but the side effect is when you tilt your head side to side the polarizing material in the glasses is not aligned with the polarizing material in the screen and you get some ghosting,
Most 3d glasses work the same way they use two layers of polarizing material, with liquid crystal between. The liquid crystal acts as a 1/4 wave retarded effectively rotating the polarization of the incoming light by 90 degrees when a signal is applied making the glasses opaque.

You lose the light from the polarizing layers when the glasses are "clear".



The sony glasses are slightly different, they rely on the light from the LCD already being polarized, and only have one layer of polarizing material in the glasses and a layer of liquid crystal, so the glasses do not go completely opaque but instead just block the polarized light from the display when a signal is applied. This means they block less light when they are clear and appear less "dark", but the side effect is when you tilt your head side to side the polarizing material in the glasses is not aligned with the polarizing material in the screen and you get some ghosting,
#2
Posted 09/09/2011 04:31 AM   
Polarization dependence , and polarized display technologies are plenty bad for image quality, they always try to sell that LC glasses, LC displays, and LCOS projectors are better than this&that whatever, but its not true.

It's dark because its full of unnecesary polarizers. Thats why. Micromechanical and nanotech shutters are better, especially if not relying on polarization .
Polarization dependence , and polarized display technologies are plenty bad for image quality, they always try to sell that LC glasses, LC displays, and LCOS projectors are better than this&that whatever, but its not true.



It's dark because its full of unnecesary polarizers. Thats why. Micromechanical and nanotech shutters are better, especially if not relying on polarization .

#3
Posted 09/09/2011 06:48 AM   
Are you sure micromechanical and nanotech shutters are better? Do they exist?
Are you sure micromechanical and nanotech shutters are better? Do they exist?

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#4
Posted 09/09/2011 02:22 PM   
In his head they do, I can assure you and they're fully ready for shipment, hence his frustration...
In his head they do, I can assure you and they're fully ready for shipment, hence his frustration...

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#5
Posted 09/09/2011 08:55 PM   
We'll see!

I'm reluctant to share links now due to my mood, maybe later. /happy.gif' class='bbc_emoticon' alt=':happy:' />
We'll see!



I'm reluctant to share links now due to my mood, maybe later. /happy.gif' class='bbc_emoticon' alt=':happy:' />

#6
Posted 09/09/2011 09:58 PM   
@ERP: That is interesting what you say about the Sony glasses. I've seen them in the store and they are way brighter than Nvidia by leaps and bounds. But the 3D Vision glasses still look OK, even if they are a tad dark.
@ERP: That is interesting what you say about the Sony glasses. I've seen them in the store and they are way brighter than Nvidia by leaps and bounds. But the 3D Vision glasses still look OK, even if they are a tad dark.
#7
Posted 09/10/2011 01:20 AM   
Sony will actually provide an optional second polarizing layer, for people who have issues with ghosting. Which makes them equivalent to everyone else.
But the TV's brightness is tuned for a single polarizing layer so you end up having to mess with picture settings.

I think the Sony's are the best of the LCD based sets I've seen, with the Panasonic Plasmas being marginally better overall for 3D.
Sony will actually provide an optional second polarizing layer, for people who have issues with ghosting. Which makes them equivalent to everyone else.

But the TV's brightness is tuned for a single polarizing layer so you end up having to mess with picture settings.



I think the Sony's are the best of the LCD based sets I've seen, with the Panasonic Plasmas being marginally better overall for 3D.
#8
Posted 09/10/2011 01:52 AM   
Well, ive said it before: i would swear, after days of comparison, that the Sharp glasses that came with my LE835 had the same brightness, while shuttering, as the Sony NX71, with 2010 Sony glasses did, while NOT shuttering. I'm surprised people haven't said anything about that, it quite a bar-setter i would think.
Well, ive said it before: i would swear, after days of comparison, that the Sharp glasses that came with my LE835 had the same brightness, while shuttering, as the Sony NX71, with 2010 Sony glasses did, while NOT shuttering. I'm surprised people haven't said anything about that, it quite a bar-setter i would think.

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#9
Posted 09/10/2011 03:41 AM   
Based on available stuff without NDA,
I calculate over 55% transparency for micromechanical, and 100microseconds response time, no color tint,

vs.

33% transparency and on order of milliseconds response time for LC, plus tint. Response time prevents really high freqs. Opaque to clear transition is especially slow with LC.

Price should be comparable, but I'd pay around 600 if these were available.
Based on available stuff without NDA,

I calculate over 55% transparency for micromechanical, and 100microseconds response time, no color tint,



vs.



33% transparency and on order of milliseconds response time for LC, plus tint. Response time prevents really high freqs. Opaque to clear transition is especially slow with LC.



Price should be comparable, but I'd pay around 600 if these were available.

#10
Posted 09/10/2011 07:35 AM   
[quote]My question is, is the 3D technology used in 3D Vision glasses different from those used in Sony or LG glasses? What exactly is the technology?[/quote]
3D Vision blocks light for each eye in turn. Your monitor (or whatever) shows the left eye's picture when the left eye is clear on the glasses. Then the glasses block the left eye, open the right eye, and the right eye's image displays on the monitor. The images and glasses switch back and forth very quickly so you can't see the blinking.

They do definitely block some light. If your game goes in a dark tunnel, it's going to become a very dark tunnel. This actually isn't much of a problem. Simply hit the 3D hotkey to turn 3D off while you're in the dark. Then toggle it back on when the light gets sane again.
My question is, is the 3D technology used in 3D Vision glasses different from those used in Sony or LG glasses? What exactly is the technology?


3D Vision blocks light for each eye in turn. Your monitor (or whatever) shows the left eye's picture when the left eye is clear on the glasses. Then the glasses block the left eye, open the right eye, and the right eye's image displays on the monitor. The images and glasses switch back and forth very quickly so you can't see the blinking.



They do definitely block some light. If your game goes in a dark tunnel, it's going to become a very dark tunnel. This actually isn't much of a problem. Simply hit the 3D hotkey to turn 3D off while you're in the dark. Then toggle it back on when the light gets sane again.

#11
Posted 09/11/2011 04:37 AM   
[quote name='Zloth' date='11 September 2011 - 12:37 AM' timestamp='1315715821' post='1291285']
Simply hit the 3D hotkey to turn 3D off while you're in the dark. Then toggle it back on when the light gets sane again.
[/quote]
Unless you are playing Metro 2033, in which case, thats the whole game.
[quote name='Zloth' date='11 September 2011 - 12:37 AM' timestamp='1315715821' post='1291285']

Simply hit the 3D hotkey to turn 3D off while you're in the dark. Then toggle it back on when the light gets sane again.



Unless you are playing Metro 2033, in which case, thats the whole game.
#12
Posted 09/11/2011 05:04 PM   
I just use in game brightness and gamma settings to compensate for the darker effect the glasses produce. Problem solved. It's especially helpful when certain games have a gauge to use - e.g.: "adjust brightness until you barely see the darkest square, etc..". Just make adjustments with your glasses on and you won't notice any darkness problem while you are playing.
I just use in game brightness and gamma settings to compensate for the darker effect the glasses produce. Problem solved. It's especially helpful when certain games have a gauge to use - e.g.: "adjust brightness until you barely see the darkest square, etc..". Just make adjustments with your glasses on and you won't notice any darkness problem while you are playing.

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#13
Posted 09/13/2011 04:25 PM   
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