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This did not inspire confidence: Commercial LEDs consist of a semiconductor material that is electrically injected with positive and negative charges, which pr
by unwind 9y ago
This did not inspire confidence:
Commercial LEDs consist of a semiconductor material that is electrically injected with positive and negative charges, which produce light when they meet. Typically, two contact points are used in a semiconductor-based light emitting device; one for injecting negatively charged particles and one injecting positively charged particles.
Isn't that a bit too simplified?
That said it sounds like very cool technology although hard to see how electrical wires to each pixel would be as invisible at wall-sized scales.
- joering2 9y agoWhy not? Those "wires" will be thinner than human hair.
- ben_w 9y ago“Human hair” is much too thick for an invisible display. Do you have a more exact size?
- userbinator 9y agoalthough hard to see how electrical wires to each pixel would be as invisible at wall-sized scales. https://en.wikipedia.org/wiki/Indium_tin_oxide https://en.wikipedia.org/wiki/Indium_tin_oxide
- kurthr 9y agoITO isn't really transparent... it's pretty yellow (80-95% transmission) and it doesn't carry current well (20-100ohm/sq). You'd be better off with a metal mesh with large pitch electrodes. You're going to need some wires to address the display as well (whether active or passive matrix). With a large pitch Cu or Al conductors you can do 5ohm/sq with good transparency. That will let you do 200nits (candela/m2) with the efficiency of these thin LEDs. ITO would be 10x lower conductance and only works in LCDs because they are inverting voltage light valves (not light sources). If everything worked out you could reasonably view thin LEDs in a dim office environment. That's not really interesting unless it's 3D.
- dorfsmay 9y agoDidn't you know? When an anion and a cation meet they make little baby photons!