Human-machine interface with graphene-pyroelectric materials

Patent metadata

Field	Value
Publication number	US-10228784-B2
Application number	US-201515323243-A
Country	US
Kind code	B2
Filing date	Jul 7, 2015
Priority date	Jul 8, 2014
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

A version of the invention comprises a device for controlling or interfacing with a computer or other form of communicable machine based on the pyroelectric effect, and includes at least one optically- and infrared- (IR-) transparent graphene electrode.

First claim

What is claimed is:

1. A control device for interfacing between a human and a communicable machine based on the pyroelectric effect, the control device comprising:
at least one graphene electrode configured to transmit at least a portion of infrared radiation, emitted from the at least a portion of the human's body in a motion relative to the control device, to at least one pyroelectric active layer;
the at least one pyroelectric active layer, said at least one pyroelectric active layer being configured to undergo a reorientation of dipoles in response to the portion of the infrared radiation received through the at least one graphene electrode; and
at least one rear electrode;
the at least one graphene electrode, the at least one pyroelectric active layer and the at least one rear electrode defining at least one pixel configured to generate an electrical signal, in response to the motion of the at least a portion of the human's body relative to the control device, based on at least the reorientation of the dipoles in the at least one pyroelectric active layer.

2. The control device of claim 1 , wherein the at least one pyroelectric active layer is optically transparent or wherein the at least one pyroelectric active layer is optically opaque.

3. The control device of claim 2 , wherein the at least one pyroelectric active layer comprises polyvinylidene fluoride or a co-polymer of polyvinylidene fluoride.

4. The control device of claim 3 , wherein the at least one pyroelectric active layer comprises polyvinylidene fluoride-co-trifluoroethylene.

5. The control device of claim 2 , wherein the at least one pyroelectric active layer comprises lead zirconate titanate.

6. The control device of claim 1 , wherein the at least one rear electrode comprises an optically transparent conductor.

7. The control device of claim 6 , wherein the at least one rear electrode comprises graphene or at least one of: indium tin oxide and a silver nanowire.

8. The control device of claim 1 , wherein the at least one rear electrode comprises an optically non-transparent conductor.

9. The control device of claim 8 , wherein the at least one rear electrode comprises at least one of: gold; nickel; and copper.

10. The control device of claim 1 , wherein the at least one graphene electrode comprises a first array of a plurality of electrodes configured to be selectively activated in response to one of an x-position or a y-position of the at least a portion of the human body relative to the first array, and wherein the at least one rear electrode comprises a second array of a plurality of electrodes configured to be selectively activated in response to another one of the x-position or the y-position of the at least a portion of the human body relative to the second array.

11. The control device of claim 1 , wherein the at least one pixel comprises an array of at least one of: a plurality of diamond-shaped pixels; a plurality of rectangle-shaped pixels; and a plurality of triangle-shaped pixels.

12. The control device of claim 1 , wherein the control device is integrated with a display.

13. The control device of claim 12 , wherein the control device is mounted such that the display is underlying the control device.

14. The control device of claim 12 , wherein the at least one rear electrode is mounted underlying the display, and wherein the at least one graphene electrode and the at least one rear electrode are further configured to drive the display.

15. The control device of claim 12 , further comprising at least one dark pixel configured to reduce or eliminate noise in the control device.

16. The control device of claim 1 , wherein the control device is connected to control the communicable machine and is located separate from the communicable machine.

17. The control device of claim 1 , wherein the control device receives no external power to detect the motion of the at least a portion of the human's body relative to the control device.

18. The control device of claim 1 , wherein the control device detects the motion of the at least a portion of the human's body relative to the control device without contacting the at least a portion of the human's body.

19. The control device of claim 1 , wherein the control device is mechanically flexible.

20. The control device of claim 1 , wherein the control device is connected for human interface with at least one of: a computer, a smartphone, an interactive television, a tablet, a trackpad, a virtual gaming device and a motion-based door activator.

Assignees

• Nat Univ Singapore

Inventors

• Özyilmaz Barbaros
• Kulkarni Eeshan Sandeep
• Heussler Sascha Pierre
• Castro Neto Antonio Helio
• Andersen Henrik

Classifications

• G01J5/34

  using capacitors, e.g. pyroelectric capacitors · CPC title

• G01J5/20

  using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices · CPC title

• G01J5/0025

  Living bodies (ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00) · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G01J5/046

  Materials; Selection of thermal materials · CPC title