Proximity based gesturing devices, systems and methods

• US 9,551,573 B1
• Filed: 11/13/2014
• Issued: 01/24/2017
• Est. Priority Date: 04/24/2009
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Creator Technology BV
• Inventors: Harding, Richard, Foreman, John B.
• Primary Examiner(s): Raymond, Edward
• Application Number:
  US14/540,202
• Time in Patent Office: 803 Days
• Field of Search: 702/158, 702/160, 702182-185
• US Class Current: 1/1
• CPC Class Codes: G01B 21/16 for measuring distance of clearance between spaced objects
• CPC Class Codes: G01S 15/42 Simultaneous measurement of distance and other co-ordinates indirect measurement G01S15/46
• CPC Class Codes: G01S 15/876 Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector G01S15/872 takes precedence
• CPC Class Codes: G01S 17/42 Simultaneous measurement of distance and other co-ordinates indirect measurement G01S17/46
• CPC Class Codes: G01S 17/87 Combinations of systems using electromagnetic waves other than radio waves
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Abstract

A device includes sensor substantially coplanar with one another in a sensor plane, each sensor generating a sense value that varies according to a physical distance between the sensor and an object. The device also includes control circuits configured to generate a first position value, a second position value, and a third value using the sense values in a first mode to detect a hover or glove operation by the object. The first position value and the second position values identify a two-dimensional position of the object in the sensor plane and the third value varies in response to movement of the object in a Z-direction substantially perpendicular to the sensor plane. The control circuits are also configured to generate a fourth position value and a fifth position value in a second mode to detect a touch operation by the object. The control circuits include a programmable integrated circuit including an analog portion and a digital portion.

Claims

1. A device comprising:

a plurality of sensors substantially coplanar with one another in a sensor plane, each sensor to generate a sense value, which varies according to a physical distance between that sensor and an object; and

control circuits configured to generate a first position value, a second position value, and a third value using the sense values in a first mode to detect a hover or glove operation, the first position value and second position value identifying a two-dimensional position of the object in the sensor plane and the third value identifying a distance of the object in an axis substantially perpendicular to the sensor plane, wherein the control circuits are further configured to generate a fourth position value and a fifth position value using additional sense values from the plurality of sensors in a second mode to detect a touch operation, the fourth position value and the fifth position value identifying a second two-dimensional position of the object in the sensor plane, wherein the control circuits comprise a programmable integrated circuit comprising;

an analog portion configured to acquire the sense value at each sensor and convert the sense value to a numerical sensor count value; and

a digital portion comprising arithmetic logic circuits configured to calculate the first position value, the second position value, and the third value from the numerical sensor count values in the first mode and to calculate the fourth position value and the fifth position value from the numerical sensor count values in the second mode.

2. The device of claim 1, wherein the plurality of sensors comprises capacitive sensors, and the physical distance between each capacitive sensor and the object varies a capacitance of each capacitive sensor by capacitive coupling.

3. The device of claim 1, further comprising at least one stimulus circuit configured to generate a signal configured to interact with the object and is to be detected by the plurality of sensors.

4. The device of claim 3, wherein the at least one stimulus circuit and plurality of sensors are included in a system, wherein the system comprises at least one of:

an acoustic system comprising a stimulus circuit configured to generate a sound signal and acoustic transducers configured to detect the sound signal reflecting off the object,

ultrasonic systems comprising a stimulus circuit configured to generate an ultrasonic signal and acoustic transducers configured to detect the ultrasonic signal reflecting off the object, or

light detection systems comprising a stimulus circuit configured to generate light and light detectors configured to detect the light reflecting off the object.

5. The device of claim 1, wherein the third value is a third position value, and wherein the first position value, second position value and third position value identify a three-dimensional position of the object in a space adjacent to the sensor plane.

6. The device of claim 1, wherein the analog portion comprises inputs connected to each sensor configured to be selectively connected to a common sense node by input switches, an analog-to-digital conversion circuit configured to convert the sense value at the common sense node into a digital value, and the digital portion comprises a processor configured to execute instructions stored in an instruction memory.

7. The device of claim 1, wherein the plurality of sensors comprises:

a first sensor and a second sensor aligned along a first axis, and

a third sensor and a fourth sensor aligned along a second axis different than the first axis, and wherein the control circuits are configured to generate the first position value using the sense values of the first and second sensors, generate the second position value using the sense values of the third and fourth sensors, and generate the third value using the sense values of the first, second, third and fourth sensors.

8. The device of claim 1, wherein the plurality of sensors comprise at least a first sensor, a second sensor, and a third sensor, and wherein the control circuits are configured to generate the first position value, second position value and third value with trilateration using the sense values of the first, second, and third sensors.

9. The device of claim 1, wherein the device comprises a device surface substantially coplanar with the sensor plane, and the plurality of sensors are positioned on a periphery of the device surface.

10. The device of claim 1, wherein the device comprises a device surface substantially coplanar with the sensor plane, and the sensor plane comprises a touch surface of a touchscreen.

11. The device of claim 1, further comprising communication circuits configured to output the first position value, second position value, and third value in a predetermined format to a host device, wherein the host comprises an electronic device comprising a user interface coupled to the control circuits.

12. The device of claim 1, wherein the device is a portable computing device, wherein the portable computing device is at least one of a tablet computer or a mobile phone.

13. A method, adapted to a device comprising a plurality of sensors and a programmable integrated circuit having an analog portion and a digital portion, wherein the sensors are aligned in a sensor plane, and wherein the method comprises:

generating, by each of the sensors, sensor data, wherein the sensor data generated by each of the sensors varies according to a physical distance between that sensor and an object;

acquiring, by the analog portion of the programmable integrated circuit in a first mode, the sensor data from the sensors;

detecting, by the digital portion of the programmable integrated circuit in the first mode, a hover or glove operation by the object in a detection space above the sensor plane using the sensor data;

acquiring, by the analog portion of the programmable integrated circuit in a second mode, additional sensor data from the sensors; and

detecting, by the digital portion of the programmable integrated circuit in the second mode, a touch operation by the object in the detection space above the sensor plane using the additional sensor data, and wherein detecting the hover or glove operation comprises;

detecting, by the digital portion, differences between a first plurality of positions of the object in a first dimension extending from the sensor plane using the sensor data; and

detecting, by the digital portion, differences between a second plurality of positions of the object in a second dimension and a third dimension in another plane that is substantially parallel with the sensor plane using the sensor data, wherein the sensors comprise a first sensor and a second sensor aligned along a first axis, and a third sensor and a fourth sensor aligned along a second axis different than the first axis, and the detecting the differences between the second plurality of positions of the object in the other plane comprises generating a first position value from sensor data from the first and second sensors, and generating a second position value from sensor data from the third and fourth sensors.

14. The method of claim 13, further comprising:

in the second mode,

detecting, by the digital portion of the programmable integrated circuit, a presence of the object in the touch operation in the detection space above the sensor plane; and

detecting, by the digital portion of the programmable integrated circuit in the second mode, differences between a third plurality of positions of the object in the touch operation in the second dimension and the third dimension in the other plane that is substantially parallel with the sensor plane using the additional sensor data, and the detecting the differences between the third plurality of positions of the object in the other plane comprises generating a fourth position value from additional sensor data from the first and second sensors, and generating a fifth position value from additional sensor data from the third and fourth sensors.

15. The method of claim 14, wherein the detecting the differences between the first plurality of positions of the object in the first dimension comprises an arithmetic operation with the sensor data from the sensors, and the detecting the second plurality of positions of the object in the other plane that is substantially parallel with the sensor plane comprises deriving two position values, each position value being generated with the sensor data from less than all of the sensors.

16. The method of claim 14, wherein the detecting the differences between the first plurality of positions of the object in the first dimension comprises a trilateration operation with values generated in response to the sensor data.

17. The method of claim 13, wherein the acquiring the sensor data from the sensors comprises sequentially generating a count value for each sensor, each count value corresponding to a charge rate of the sensor due to a capacitance of the sensor.

18. A device comprising:

a first sensor configured to generate first proximity data for an object in a detection space adjacent to a device body;

a second sensor configured to generate second proximity data for the object in the detection space;

a third sensor configured to generate third proximity data for the object in the detection space;

a fourth sensor configured to generate fourth proximity data for the object in the detection space; and

processing circuits configured to determine a two-dimensional position of the object in a first plane of the detection space using at least two of the first proximity data, the second proximity data, the third proximity data, and the fourth proximity data and to determine movement of the object in a first direction substantially perpendicular to the first plane using at least two of the first proximity data, the second proximity data, the third proximity data, and the fourth proximity data, wherein the processing circuits are further configured to detect a hover or glove operation in a first mode using the two-dimensional position of the object in the first plane and the movement of the object in the first direction, and wherein the processing circuits are further configured to detect a touch operation in a second mode using the two-dimensional position of the object in the first plane.

19. The device of claim 18, wherein the first sensor is configured to sense a different physical quality to generate the first proximity data than the second sensor senses to generate the second proximity data, wherein the third sensor is configured to sense a different physical quality to generate the third proximity data than the fourth sensor senses to generate the fourth proximity data.

20. The device of claim 18, wherein the first sensor comprises first one or more capacitance sensors, the second sensor comprises a first image sensor, the third sensor comprises second one or more capacitance sensor, and the fourth sensor comprises a second image sensor, and wherein the processing circuits.