Active matrix lighting units for a display
View Patent ↗The present disclosure generally relates to a light manipulating device. The light manipulating device can include a light guide and an actuator above the light guide with at least one lens connected to the actuator. The at least one lens and the light guide can have a substantially similar refractive index.
1. A light manipulation device, comprising:
a light guide;
an actuator above the light guide, the actuator comprising:
a bottom electrode;
an actuatable layer; and
a top electrode above the bottom electrode; and
at least one lens coupled to the actuatable layer, wherein the at least one lens and the light guide have a substantially similar refractive index;
wherein the actuatable layer comprises a gel and wherein at least one of the top electrode and the bottom electrode comprise at least one of a carbon nanotube and a conductive polymer.
2. The light manipulation device of claim 1 , wherein the at least one lens is approximately spherical.
3. The light manipulation device of claim 1 , wherein the actuator is configured to deflect towards the bottom electrode.
4. The light manipulation device of claim 3 , wherein the at least one lens is configured to directly contact the light guide if the actuator is deflected towards the bottom electrode.
5. The light manipulation device of claim 1 , further comprising a light source configured to emit light to the light guide.
6. The light manipulation device of claim 1 , wherein the actuatable layer is positioned between the bottom electrode and the top electrode.
7. A method to operate a light manipulation device, comprising:
providing a light manipulation device according to claim 1 ;
contacting the at least one lens with the light guide by bending the actuator;
receiving light into the light guide; and
passing the light in the light guide through the at least one lens, when the at least one lens contacts the light guide, thereby operating the light manipulation device.
8. The method of claim 7 , further comprising applying a voltage between the bottom electrode and the top electrode.
9. The method of claim 8 , further comprising forcing the actuator towards the bottom electrode via the applied voltage.
10. The method of claim 9 , wherein the actuator comprises a polymer, and wherein forcing the actuator towards the bottom electrode comprises reducing a thickness of the polymer.
11. The method of claim 7 , wherein the at least one lens is spherical, and wherein light entering a bottom point of the spherical lens exits the lens on an opposite side of the lens.
12. The method of claim 7 , further comprising removing the at least one lens from contact with the light guide.
13. The method of claim 12 , wherein removing the at least one lens is achieved by reversing a voltage between the bottom electrode and the top electrode.
14. The method of claim 12 , wherein removing the at least one lens is achieved by removing or reducing a voltage between the bottom electrode and the top electrode.
15. The method of claim 12 , further comprising reflecting light internally in the light guide after the at least one lens is released from contacting the light guide.
16. A method to manufacture a light manipulation device according to claim 1 , the method comprising:
forming the top electrode by forming at least a first electrode on a top surface of a first flexible thin film;
forming the bottom electrode by forming at least a second electrode on a bottom surface of the first flexible film;
forming at least one hole through the first flexible thin film; and
providing the at least one lens in the at least one hole.
17. The method of claim 16 , wherein forming at least the first electrode comprises:
depositing a first conductive thin film on the top surface of the first flexible thin film; and
patterning the first conductive thin film to form the first electrode.
18. The method of claim 17 , wherein patterning the first conductive thin film comprises etching the first conductive thin film.
19. The method of claim 16 , wherein providing the at least one lens comprises using squeegee blade printing to form the at least one lens in the at least one hole.
20. A light emissive display, comprising:
a light guide;
an actuator above the light guide, the actuator comprising:
a bottom electrode;
a top electrode; and
an actuatable layer between the bottom electrode and the top electrode; and
an array of spherical lenses within the actuatable layer, wherein at least one lens of the array of spherical lenses has a refractive index adequately similar to a refractive index of the light guide so as to allow optical transmission after at least one lens of the array of spherical lenses touches the light guide.
21. The light emissive display of claim 20 , wherein the actuatable layer comprises a gel.