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SED TVs delayed again
shorthair:
On the Samsung I had a bit back, it didn't have color artifacts in text, but there were gradations of darkness and thickness of the text, at times. Maybe mine was off, also. I thought maybe it was refresh, cos if I put my CRT up to 100hz, it gets ever so slightly water color-looking, which is what my LCD looked like all the time.
NiN^_^NiN:
--- Quote from: Howard_Casto on May 31, 2007, 03:48:23 am ---Hologram tvs are impossible atm due to teh fact that a tv that projects 3d images into open air having to defy the laws of physics. ;) You see we can't make a beam of light magically stop projecting 3 feet in the middle of the room or what have you, we can only make it stop by putting something in front to block it. There are two ways I can think of to "fake it" though.
--- End quote ---
Actually we have the 3D boxes down here where a video is displayed to you altho it be 2D most of the time its always infront of u no matter how many times u walk around the cube and its flating in air (works the same way as thoese clocks that co back n forth really fast to show u the time yet its only like 4 leds it's quite cool
They did have a 3d object being displayed too like a vase and it looked like a transparent vase cause it was 3d and did look real 3d wise.
But yes we already have holograms tv's that are showing the tv in mid air you can walk through it and do anything to it but it is 2D
If u can even remember seaquest DSV they had this technology back then what it was is a projector projecting onto a fog cloud coming from the roof (this is used alot still they use thoese ultra sonic things in water to create the mist and blow it through a vent to get it to stay flat)
But the new technology for this is an ionised air i don't think thats it but the unit is on the roof and what it does is it create the air below it to reflect light so a projector image form a normal projector is possible to stop in mid air
It's the same as the fog method except its invisible to the eye so no1 would know i can't remember what it was tho something to do with the water in the air i think
But the technology is here but it's only available in 2D so far
shorthair:
Yeah, I can see that. Tuning the beams so they reflect, or refract, off of certain molecules, etc. You got any links for that ---steaming pile of meadow muffin---?
RandyT:
--- Quote from: Howard_Casto on May 31, 2007, 03:48:23 am ---LCD televisions still give a superior picture to all three and the image doesn't degrade over a reasonable amount of time. SED's have great potential in portable "throw away" devices like mp3 players, but not much else.
--- End quote ---
LCD is backlit by special lighting. When that lighting dims with age or burns out with no exact replacement available, you have the same longevity problems. SED's and similar technologies in larger formats have great potential in any video application. Same brightness, viewing angle, response time and black levels as CRT's but on a thin, lightweight substrate. All things an LCD have had a terrible time overcoming issues with.
--- Quote ---Hologram tvs are impossible atm due to teh fact that a tv that projects 3d images into open air having to defy the laws of physics. ;) You see we can't make a beam of light magically stop projecting 3 feet in the middle of the room or what have you, we can only make it stop by putting something in front to block it.
--- End quote ---
You don't need to make the light stop in the middle of the room. You only need to make the observer believe that it does. Multi-observer systems are the problem.
--- Quote ---Of course we still don't have a way to film things in 3d, only cg video would be possible.
--- End quote ---
Actually, filming in 3D for a single viewer system is not difficult by todays standards. You don't need any information about occluded objects in the scene, so simple depth mapping, using ultrasonics / IR lasers / etc., created based on the viewers angle of incidence and a synchronized video for surface mapping would suffice. Or you could just use two cameras that simulate human eyes and use software to create the depth map based on the differences between the two images using edge detection, etc...
--- Quote ---I want magical 3d images too, I'm just saying...don't hold your breath. It'd take a scientific breakthrough the equivelent of the discovery of electricity to give us the tech/understanding needed to generate a true 3d projection in open space.
--- End quote ---
This is true. I worked in 3D for about 5 years and was part of a development team for a patented 3D display system that was based on my optical configuration. There are some strange ways of creating three dimensional imagery out there, but most focus on the perception of the viewer, rather than trying to re-create virtual solid objects in the middle of the room. The latter seems to always be the least successful and most expensive means of creating the effect, and most of us here won't live to see the day when this form becomes a reality. Think "flying cars".
RandyT
shorthair:
I'm waiting for the day Tesla is rediscovered and not shunned by the scientific and technical communities.
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