Fluorescent microsphere mist displays

A few 3D mist displays have been demonstrated over the last decade. I’ve seen a couple at trade shows and have been impressed. To date, they use mists or curtains of tiny water droplets to make a 3D space onto which to project an image, so you get a walk-through 3D life-sized display. Like this:

Leia Display System Uses A Screen Made Of Water Mist To Display 3D Projections

or check out: http://ixfocus.com/top-10-best-3d-water-projections-ever/

Two years ago, I suggested using a forehead-mounted mist projector:

Forehead 3D mist projector

so you could have a 3D image made right in front of you anywhere.

This week, a holographic display has been doing the rounds on Twitter, called Gatebox:

https://www.geek.com/tech/gatebox-wants-to-be-your-personal-holographic-companion-1682967/

It looks OK but mist displays might be better solution for everyday use because they can be made a lot bigger more cheaply. However, nobody really wants water mist causing electrical problems in their PCs or making their notebook paper soggy. You can use smoke as a mist substitute but then you have a cloud of smoke around you. So…

Suppose instead of using water droplets and walking around veiled in fog or smoke or accompanied by electrical crackling and dead PCs, that the mist was not made of water droplets but tiny dry and obviously non-toxic particles such as fluorescent micro-spheres that are invisible to the naked eye and transparent to visible light so you can’t see the mist at all, and it won’t make stuff damp. Instead of projecting visible light, the particles are made of fluorescent material, so that they are illuminated by a UV projector and fluoresce with the right colour to make the visible display. There are plenty of fluorescent materials that could be made into tiny particles, even nano-particles, and made into an invisible mist that produces a bright and high-resolution display. Even if non-toxic is too big an ask, or the fluorescent material is too expensive to waste, a large box that keeps them contained and recycles them for the next display could still be bigger, better, brighter and cheaper than a large holographic display.

Remember, you saw it here first. My 101st invention of 2016.

Forehead 3D mist projector

Another simple idea. I was watching the 1920s period drama Downton Abbey and Lady Mary was wearing a headband with a large jewel in it. I had an idea based on linking mist projection systems to headbands. I couldn’t find a pic of Lady Mary’s band on Google but many other designs would work just as well and the one from ASOS would be just as feasible. The idea is that a forehead band (I’m sure there is a proper fashion name for them) would have a central ‘jewel’ which is actually just an ornamental IT capsule containing a misting device and a projector as well as the obvious power supply, comms, processing, direction detectors etc. A 3D image would be projected onto water mist emitted from the reservoir in the device. A simple illustration might help:

 

Many fashion items make comebacks and a lot of 1920s things seem to be in fashion again now. This could be a nice electronic update to a very old fashion concept. With a bit more miniaturisation, smart bindis would also be feasible. It could be used with direction sensing to enable augmented reality use, or simply to display the same image regardless of gaze direction. Unlike visor based augmented reality, others would be able to see the same scene visualised for the wearer.

OLED fashion contact lenses

Self explanatory concept, but not connected to my original active contact lens direct retinal projection concept. This one is just fashion stuff and could be done easily tomorrow. I allowed a small blank central area so that you aren’t blinded if you wear them. This version doesn’t project onto the retina, though future versions could also house and power devices to do so.

OK, the illustration is crap, but I’m an engineer, not a fashion designer. Additional functionality could be to display a high res one time code into iris recognition systems for high security access.

Casual displays

I had a new idea. If I was adventurous or an entrepreneur, I’d develop it, but I’m not, so I won’t. But you can, before Apple patents it. Or maybe they already have.

Many people own various brands of pads, but they are generally expensive, heavy, fragile and need far too much charging. That’s because they try to be high powered computers. Even e-book readers have too much functionality for some display purposes and that creates extra expense. I believe there is a large market for more casual displays that are cheap enough to throw around at all sorts of tasks that don’t need anything other than the ability to change and hold a display.

Several years ago, Texas Instruments invented memory spots, that let people add multimedia to everyday objects. The spots could hold a short video for example, and be stuck on any everyday object.These were a good idea, but one of very many good ideas competing for attention by development engineers. Other companies have also had similar ideas. However, turning the idea around, spots like this could be used to hold data for a  display, and could be programmed by a similar pen-like device or even a finger touch. Up to 2Mb/s can be transmitted through the skin surface.

Cheap displays that have little additional functionality could be made cheaply and use low power. If they are cheap enough, less than ten pounds say, they could be used for many everyday purposes where cards or paper are currently used. And since they are cheap, there could be many of them. With a pad, it has to do many tasks. A casual display would do only one. You could have them all over the place, as recipe cards, photos, pieces of art, maps, books, body adornment, playing cards, messages, birthday cards, instructions, medical advice, or anything. For example:

Friend cards could act as a pin-board reminder of a friend, or sit in a wallet or handbag. You might have one for each of several best friends. A touch of the spot would update the card with the latest photo or status from Facebook or another social site. Or it could be done via a smart phone jack. But since the card only has simple functionality  it would stay cheap. It does nothing that can’t also be done by a smartphone or pad, but the point is that it doesn’t have to. It is always the friend card. The image would stay. It doesn’t need anything to be clicked or charged up. It only needs power momentarily to change the picture.

There are displays that can hold pictures without power that are postcard sized, for less than £10. Adding a simple data storage chip and drivers shouldn’t add significantly to cost. So this idea should be perfectly feasible. We should be able to have lots of casual displays all over our houses and offices if they don’t have to do numerous other things. In the case of displays, less may mean more.