Laser Displays

[buns]

starting to get bored

I was thinking this would be smart- using a laser pointer on screen, and pressing a button will select that button (ie like a light gun, but you can see where you're pointing to)

It'll make DVD menu navigation alot easier and & faster.

[buns]

i think you have taken me incorrectly...... this is a totally different technology...... no lcd displays...... the lasers map the image. I'll go and get the avs link.

It has great potential i would have thought because (ssuming a reliable blue laser) the rgb would be highly coherent making for very pure colours and it should also be very good for fine tuning.

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[buns]

here

Read it.. don't like the idea of a laser Rear Projection!

And I have to agree with that one bloke, if it's way beyond reach for 10 years then it's pretty much irreverent until it drops down in price to £1000-£5000.

[buns]

Well i dont think it should be that far away..... in 10 years we should be using screens which roll up and need no projector!

this technology surely is dependent on the maturity of blue lasers which isnt 10 years away.

They will need to rename the whole thing though...... people see lasers as things from star trek which burn and kill!

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[calibos]

in 10 years we should be using screens which roll up and need no projector

You mean Light emitting polymer (LEP)screens buns?

people see lasers as things from star trek which burn and kill!

I haven't read the thread and I'm assuming the lasers wouldn't be very powerful but is even a low power laser safe. Would the beam coming from the lense be as bright as a laser pen/pointer because even those are supposed to be dangerous to the eyes. You never know though. The new heads up displays the American military are developing (micro laser paints image directly onto the retina) might filter down to the consumer electronics arena and we wont even need a screen. We'll all have our own personal 200inch screen. (as opposed to our own 50in screens with the current LCD eye glasses technology).

I'm off to read that thread now!

[buns]

frankly i think it would be a bad idea to look straight into a bulb projector! There is that potential for danger, but if these things are truly near to production then it will surely have been considered.

what intrigues me most is why Alan Gouger isnt commenting...... is it all just hype...... or is it so good that they dont want to say until they sell off all their other machines!

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I have worked with Laser projectors for around 2 years now, and I have to say the picture quality is brilliant, mainly due to the intense colour saturation, however it does have its drawbacks, both optical performance (halo effect), safety, power consumption, space and cost.

Not to used in the home I don't think. We have installed them on various simulators and in several planetariums, so it is reliable and fairly mature.

[buns]

Anders,

Why would you think then that AV specialists are keeping so quiet about this? Is it at all possible that someone has come up with a technique of circumventing the issues you mention?

Also, how come power consumption is an issue? Solid state lasers which i would have encountered would be dramatically more efficient than any other device we would use in the lad.

Good to hear from someone in the field

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[Marcus Wood]

I wouldn't have thought safety would be an issue. Relatively crude laser 'projectors' have been commonly used in nightclubs for a long time. I mean the things that are used to draw shapes with lines of light, presumably using servoed mirrors.

And what about the lasers in supermarket check-outs?

Presumably the factor in damaging your eyes would be the density of light output (i.e. lumens per square metre at a particular distance). I would have thought this would need to be the same for a laser projector as for a conventional projector with the same apparent brightness.

[buns]

Marcus,

What you refer to is the intensity..... im fairly sure that the fact that the light is 'laser' is irrelevant! Laser if simply referring to the manner in which the light is produced. The result has the potential to be intense simply because of the propertied of the beam in which light is produced. So if you looked straight at a standard light source at an intensity the same as a given laser, both would cause similar damage (though im sure there is slight interpretation to someone more medically minded).

What im long windedly saying is that im certain the machines will not be of any significant health risk

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[calibos]

I wonder will refresh rates become a bigger issue again? In that this new tech draws/scans the image much like a crt tv.

It'll be like sitting between the electron gun of your tv set and looking at the back of the screen!!

[buns]

i dont know how the scanning and whatever for crt works, but lasers tend to have very good temporal responses, i suspect that the laser response will be limited by external circuitry

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It is very much the same path taken yes. i.e. top left to bottom right.

The system I am fairly familiar with has quite a large laser generator where the white laser is then split to its prime RGB, using a similar techniques to 3 chip LCD and DLP PJ's. It is also where the image processing takes place. However it can power up to 3 display heads..with more channels being added all the time. The laser then travels down optical cable to the tiny light weight projection head. (see hear ...http://www.schneider-ag.de/)

This is the system I have worked with and installed on various projects. The perfect solution to kack CRT's and naff black levels, just a tad expensive!!