Touch input detector with an integrated antenna

• US 10,235,004 B1
• Filed: 11/19/2012
• Issued: 03/19/2019
• Est. Priority Date: 11/18/2011
• Status: Active Grant

• Current Assignee: Sentons, Inc.
• Original Assignee: Sentons, Inc.
• Inventors: Lynn, Lapoe E., Sheng, Samuel W., Shih, Shih-Ming, Hsieh, Yenyu, Khitrov, Michael L.
• Primary Examiner(s): Li, Lin
• Application Number:
  US13/681,279
• Time in Patent Office: 2,311 Days
• Field of Search: 3151693, 340 552, 340 561, 343702, 343893, 345173, 345177-178, 349 63, 455566, 715784
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04182 Filtering of noise external to the device and not generated by digitiser components
• CPC Class Codes: G06F 3/0436 in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/44 using equipment having another main function to serve additionally as an antenna , e.g. means for giving an antenna an aesthetic aspectH01Q1/27 - H01Q1/34 take precedence

Abstract

A touch input system is disclosed. The system includes a medium configured to receive a touch input. The system includes an antenna located substantially adjacent and parallel to at least a portion of the medium where the touch input may be received. The system includes a transmitter substantially coupled to the medium, wherein the transmitter is configured to propagate a propagating signal through the medium. The system includes a detector that detects a disturbance to the propagating signal by the touch input, wherein the detector is configured to output data indicating the disturbance of the propagating signal that is indicative of a user indication.

Claims

1. A touch input system, comprising:

a medium configured to receive a touch input on a touch input region of the medium, wherein the medium includes a first surface where the touch input is receivable;

an antenna coupled to the medium as a layer that is at least in part transparent, wherein the antenna is a wireless communication antenna configured to receive a wireless signal, the antenna is not a touch detection conductor, and the antenna is not utilized to detect a capacitance change or a resistance change to detect the touch input;

an acoustic transmitter substantially coupled to the medium, wherein the transmitter is configured to freely propagate a signal through the medium in multiple directions within the touch input region from the same acoustic transmitter to a plurality of detectors and the freely propagated signal includes at least one of an acoustic signal or an ultrasonic signal;

at least one of the detectors configured to receive a disturbed signal, wherein the disturbed signal includes at least a portion of the freely propagated signal that has been disturbed by the touch input on the first surface;

a digital signal generator configured to generate a simplified reference signal based at least in part a pseudorandom binary sequence included in the freely propagated signal of the acoustic transmitter; and

a processor configured to determine a force of the touch input based at least in part on a comparison of the disturbed signal to the simplified reference signal.

2. The system of claim 1, wherein the antenna is coupled to the medium on a second surface substantially opposite the first surface of the medium.

3. The system of claim 1, further comprising a second antenna located substantially adjacent and parallel to the medium.

4. The system of claim 1, wherein at least a portion of the medium is included in a display screen.

5. The system of claim 1, wherein at least a portion of the antenna is positioned over a display screen.

6. The system of claim 1, wherein the antenna includes a first conductive element that has a physical separation from one or more other conductive elements of the antenna.

7. The system of claim 1, wherein a ground plane of a circuit board coupled to the antenna functions as a conductive element of the antenna.

8. The system of claim 1, wherein a display screen coupled to the antenna functions as a conductive element of the antenna.

9. The system of claim 1, wherein the antenna is a planar inverted-F antenna.

10. The system of claim 1, wherein the antenna is at least a part of a multiple-input and multiple-output antenna configuration.

11. The system of claim 1, wherein the antenna is at least a part of a phased array antenna configuration.

12. The system of claim 1, wherein the antenna includes an indium tin oxide material.

13. The system of claim 1, wherein the antenna includes a carbon nanotube.

14. The system of claim 1, wherein the antenna includes a nanowire.

15. The system of claim 1, wherein the antenna includes a nanomesh.

16. The system of claim 1, wherein the antenna includes a silver-doped ink.

17. The system of claim 1, wherein the disturbance corresponds to a user indication and the user indication includes a location on the first surface of the medium where a user input was received.

18. The system of claim 1, wherein the transmitter includes an ultrasonic transducer.

19. The system of claim 1, wherein the transmitter includes a transducer.

21. The system of claim 1, wherein the disturbance includes a time delay difference of the freely propagated signal caused by the touch input.

20. A touch detection apparatus, comprising:

medium means for receiving a touch input on a touch input region of the medium, wherein the medium means includes a first surface where the touch input is receivable;

antenna means for receiving a wireless signal without detecting the touch input, wherein the antenna means is coupled to the medium means as a layer that is at least in part transparent;

acoustic transmitter means for freely propagating a signal through the medium means in multiple directions within the touch input region from the same acoustic transmitter means to a plurality of detectors, wherein the transmitter means is substantially coupled to the medium means and the freely propagated signal includes at least one of an acoustic signal and an ultrasonic signal;

a detector means for detecting a disturbed signal, wherein the detector means is included in the plurality of detectors and the disturbed signal includes at least a portion of the freely propagated signal that has been disturbed by the touch input on the first surface;

a digital signal generator means for generating a simplified reference signal based at least in part a pseudorandom binary sequence included in the freely propagated signal of the acoustic transmitter; and

a processor means for determining a force of the touch input based at least in part on a comparison of the disturbed signal to the simplified reference signal.