The title character of Ray Bradbury's book The Illustrated Man is covered with moving, shifting tattoos. If you look at them, they will tell you a story.

New LED tattoos from the University of Pennsylvania could make the Illustrated Man real (minus the creepy stories, of course). Researchers there are developing silicon-and-silk implantable devices which sit under the skin like a tattoo. Already implanted into mice, these tattoos could carry LEDs, turning your skin into a screen.

The silk substrate onto which the chips are mounted eventually dissolves away inside the body, leaving just the electronics behind. The silicon chips are about 1mm long and just 250 nanometres thick. The sheet of silk will keep them in place, moulding to the shape of the skin when saline solution is added.


These displays could be hooked up to any kind of electronic device, also inside the body. Medical uses are being explored, from blood-sugar sensors that show their readouts on the skin itself to neurodevices that tie into the body's nervous system – hooking chips to particular nerves to control a prosthetic hand, for example.

Chips are already used inside bodies, most notably the tiny RFID tags injected into pets. But the flexible nature of these "tattooed" circuits means they can move elastically with the body, sitting in places that a rigid circuit board couldn't.

Read next The rise of AI is forcing Google and Microsoft to become chipmakers The rise of AI is forcing Google and Microsoft to become chipmakers

The first displays are sure to be primitive, but could be very useful for the patients that receive them. You won't be getting the full-colour, high-res images that come with ink, but functional displays. This doesn't mean that the commercial and artistic possibilities are being ignored. Philips, the electronics giant, is exploring some rather sexual uses:

<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="486" height="412" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0">


<param name="id" value="flashObj" />

<param name="bgcolor" value="#FFFFFF" />

<param name="flashVars" value="videoId=25240201001&playerID=23188062001&domain=embed&" />

Read next IBM crams 30 billion switches onto a chip the size of a fingernail IBM crams 30 billion switches onto a chip the size of a fingernail

<param name="base" value="http://admin.brightcove.com" />


<param name="seamlesstabbing" value="false" />

<param name="allowFullScreen" value="true" />

<param name="swLiveConnect" value="true" />

<param name="allowScriptAccess" value="always" />

<param name="src" value="http://c.brightcove.com/services/viewer/federated_f9/23188062001?isVid=1&publisherID=1875254528" /><embed type="application/x-shockwave-flash" width="486" height="412" src="http://c.brightcove.com/services/viewer/federated_f9/23188062001?isVid=1&publisherID=1875254528" allowscriptaccess="always" swliveconnect="true" allowfullscreen="true" seamlesstabbing="false" base="http://admin.brightcove.com" flashvars="videoId=25240201001&playerID=23188062001&domain=embed&" bgcolor="#FFFFFF" id="flashObj"></embed>

</object>


It's certainly rather creepy, but we're sure that the inevitable next stage of playing adult movie clips on your partner's back will be appealing to some. We, of course, are considering the geekier side of this tech. GPS, with a map readout on the back of the wrist would certainly be useful, as would chips that cover your eyeballs and can darken down when the sun is shining too bright.

And a full-body display will eventually be used for advertising. Combine this with bioluminescent ink, for example, and you could turn yourself into a small, walking version of Piccadilly Circus. At least, unlike a real tattoo, you can switch this one off.

In fact, if you start to imagine the possible uses, they seem almost endless. Just like the stories that play across the body of the Illustrated Man.