Film and stylus system for emulating pen-on-paper tactile feedback

A system for enhancing writing feedback comprising:

• a stylus comprising a stylus tip;
• and
• a film comprising:
• an elastic layer, comprising a first polymer exhibiting optical transparency and bulk elasticity;
• an interface layer arranged across an upper surface of the elastic layer comprising a second polymer exhibiting optical transparency, abrasion resistance, impact resistance, UV resistance, and smoothness to touch;
• a distribution of microparticles comprised of a hard polymer suspended within the interface layer, the microparticles characterized by optical transparency and an average distance between adjacent microparticles less than a diameter of the stylus tip;
• and
• wherein the interface layer and the elastic layer mutually deform to resist transverse movement of the stylus tip across the interface layer in response to an application of writing force to the interface layer via the stylus tip.

A system for enhancing writing feedback comprising:

• a stylus comprising a stylus tip;
• a film comprising:
• an elastic layer, comprising a first polymer exhibiting optical transparency and bulk elasticity;
• an interface layer arranged across an upper surface of the elastic layer comprising a second polymer exhibiting optical transparency, abrasion resistance, impact resistance, UV resistance, and smoothness to touch;
• and
• wherein the interface layer and the elastic layer mutually deform to resist transverse movement of the stylus tip across the interface layer in response to an application of writing force to the interface layer via the stylus tip;
• and
• a touch sensitive display:
• arranged across a bottom surface of the elastic layer;
• bonded to the elastic layer via a layer of optically clear adhesive;
• and
• configured to detect the stylus tip at a distance substantially equal to a film thickness of the film.

A system for enhancing writing feedback comprising:

• a stylus comprising a stylus tip;
• and
• a film comprising:
• an elastic layer, comprising a first polymer exhibiting optical transparency and bulk elasticity;
• an interface layer arranged across an upper surface of the elastic layer comprising a second polymer exhibiting optical transparency, abrasion resistance, impact resistance, UV resistance, and smoothness to touch;
• and
• wherein the interface layer and the elastic layer mutually deform to resist transverse movement of the stylus tip across the interface layer in response to an application of writing force to the interface layer via the stylus tip;
• and
• wherein the film defines a film thickness between 50 micrometers and 200 micrometers and the elastic layer defines a thickness between two and three times a thickness of the interface layer.