User interface with child-lock feature

• US 9,244,576 B1
• Filed: 12/21/2012
• Issued: 01/26/2016
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Original Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Inventors: Vojjala, Santhosh Kumar, El-Khoury, Hassane, Vadagave, Sangamesh
• Primary Examiner(s): Cerullo, Liliana
• Application Number:
  US13/725,822
• Time in Patent Office: 1,131 Days
• Field of Search: 345173-184, 178 1801- 2004, 340988-996, 434 62- 71
• US Class Current: 1/1
• CPC Class Codes: B60R 21/01532 using electric or capacitive field sensors
• CPC Class Codes: E05B 77/26 specially adapted for child safety
• CPC Class Codes: E05B 81/76 Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: H04N 21/42224 Touch pad or touch panel provided on the remote control
• CPC Class Codes: H04N 21/4542 Blocking scenes or portions of the received content, e.g. censoring scenes
• CPC Class Codes: H04N 21/47 End-user applications

Abstract

Apparatuses and methods of touch discrimination are described. One method receives data from an occupant classification system and sets a touch detection threshold of a touch-sensing device based on the received data. The method may be used to discriminate between an adult touch and a child touch and to selectively allow access to control functionality to adults and not to children.

Claims

1. A method comprising:

setting a capacitive touch detection threshold of an input touch-sensing device based on input from a seat occupant classification system;

detecting a touch at a location of a capacitive sense element of a plurality of capacitive sense elements comprised by the input touch-sensing device of a vehicle user interface;

classifying, by a processing device and based on a plurality of factors, whether the touch is a child touch or an adult touch, wherein the plurality of factors comprises comparing an amount of capacitance induced by the touch at the location of the capacitive sense element of the input touch-sensing device to the capacitive touch detection threshold; and

selectively enabling or disabling at least a portion of control functionality of the vehicle user interface based on the classification.

2. The method of claim 1, wherein the input touch-sensing device comprises a capacitive sense array.

3. The method of claim 1, wherein the plurality of factors comprises a finger-size associated with the touch.

4. The method of claim 1, wherein the plurality of factors comprises a large object detection threshold.

5. The method of claim 1, wherein the seat occupant classification system comprises at least one of a seat pressure sensor, a seat belt tension sensor, or an image sensor.

6. The method of claim 1, wherein classifying whether the touch is the child touch or the adult touch is based on comparing a digital capacitance count indicative of the amount of capacitance induced by the touch at the location of the capacitive sense element of the input touch-sensing device to the capacitive touch detection threshold.

7. The method of claim 1, wherein selectively enabling or disabling at least a portion of control functionality of the vehicle user interface is further based on a user input enabling a child-lock feature.

8. The method of claim 1, wherein the control functionality of the vehicle user interface comprises at least one of a volume control, a channel control, a window control, or a door control.

9. The method of claim 1, wherein the input from the seat occupant classification system comprises input from a rear seat.

10. A system comprising:

an input touch-sensing device; and

a processing device coupled to the input touch-sensing device, wherein the processing device is to;

set a capacitive touch detection threshold of an input touch-sensing device based on input from a seat occupant classification system;

detect a touch at a location of a capacitive sense element of a plurality of capacitive sense elements comprised by the input touch-sensing device;

classify, based on a plurality of factors, whether the touch is a child touch or an adult touch, wherein the plurality of factors comprises comparing an amount of capacitance induced by the touch at the location of the capacitive sense element of the input touch-sensing device to the capacitive touch detection threshold; and

selectively enable or disable at least a portion of control functionality associated with the input touch-sensing device based on the classification.

11. The system of claim 10, wherein the input touch-sensing device comprises a capacitive sense array.

12. The system of claim 10, wherein the plurality of factors comprises at least one of a finger-size associated with the touch or a large object detection threshold.

13. The system of claim 10, wherein the seat occupant classification system comprises at least one of a seat pressure sensor, a seat belt tension sensor, or an image sensor.

14. The system of claim 10, wherein the processing device is to classify whether the touch is the child touch or the adult touch based on comparing a digital capacitance count indicative of the amount of capacitance induced by the touch at the location of the capacitive sense element of the input touch-sensing device to the capacitive touch detection threshold.

15. The system of claim 10, wherein the input from the seat occupant classification system comprises input from a rear seat.

16. A method comprising:

receiving data from a seat occupant classification system to classify a seat occupant as a child or an adult; and

setting a capacitive touch detection threshold of an input touch-sensing device based on the received data, wherein the input touch-sensing device is to detect a touch by comparing an amount of capacitance induced by the touch at a location of a capacitive sense element of a plurality of capacitive sense elements comprised by the input touch-sensing device to the capacitive touch detection threshold.

17. The method of claim 16, wherein the received data comprises at least one classification of an occupant.

18. The method of claim 16, wherein the received data comprises seat belt deployment data.

19. The method of claim 16, wherein setting the capacitive touch detection threshold comprises:

setting the capacitive touch detection threshold to a first value for decreased sensitivity in response to the received data indicating that a child is detected and an adult reach is not detected;

or

setting the capacitive touch detection threshold to a second value for increased sensitivity in response to the received data indicating that a child is not detected or an adult reach is detected.

20. The method of claim 16, further comprising determining whether a manual mode or an automatic mode has been selected.

21. The method of claim 16, wherein the seat occupant classification system is to classify the occupant of a rear seat.