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Phone screens that vary their texture or have a typing feel

lasertweeezer or laser tractor beam effects at phone screens cause tactile feedback when typing. Metalensing is a possible optical approach
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lasertweezers are little areas of light with similarities to standing waves that are strong enough to move around microorganisms. It is possible that strong laser tweezers could possibly effect the human sense of touch, giving tactile feedback from flat glass screens.

It is also possible that another phenomena, capable of moving 2/10 mm polymer beads called laser tractor beams could also be effective at causing smooth glass screens to have varied feel and touch effects.

Metalensing is recently described technology where a velvet like group of near vertical eentsy waveguides gives the ability to do nonrefractive lensing. Metalensing could produce the laser tractor beams at the phone surface.

beanangel, Oct 21 2016

wikipedia laser tweezers https://en.wikipedi...ki/Optical_tweezers
[beanangel, Oct 21 2016]

laser tractor beams move .2mm particles http://www.iflscien...ver-long-distances/
[beanangel, Oct 21 2016]

[link]






       Both the mechanisms you suggest are only capable of exerting very small forces. Therefore, to make this idea practical, extremely powerful lasers will be required. [+]
Wrongfellow, Oct 22 2016
  

       I am earnestly optimistic that the amazing 2/10 of a mm at laser tractor beams is bigger than touch sensors at nerves!
beanangel, Oct 22 2016
  

       I believe this has been done in the past using electroactive polymers to actually change the shape/texture of the surface.
notexactly, Oct 24 2016
  
      
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