Touch detection on a curved surface

• US 9,898,142 B2
• Filed: 04/01/2016
• Issued: 02/20/2018
• Est. Priority Date: 04/01/2016
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Tu, Hongen, Van Wiemeersch, John Robert
• Primary Examiner(s): Taylor, Jr., Duane N
• Application Number:
  US15/089,463
• Publication Number:
  US 20170285791A1
• Time in Patent Office: 690 Days
• Field of Search: None
• CPC Class Codes: B60K 2360/143 Touch sensitive instrument input devices
• CPC Class Codes: B60K 2360/345 Illumination of controls
• CPC Class Codes: B60K 2360/48 Sensors
• CPC Class Codes: B60K 2360/62 Anti-theft arrangements
• CPC Class Codes: B60K 2360/794 on or in doors
• CPC Class Codes: B60K 2360/797 at the vehicle exterior
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/10 Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
• CPC Class Codes: B60K 35/60 Instruments characterised by their location or relative disposition in or on vehicles arrangements of lighting devices on dashboards B60Q3/10
• CPC Class Codes: G06F 1/3262 Power saving in digitizer or tablet
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/0428 by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual sensing beam interruptions in a planar beam grid of an optical touch-screen G06F3/0421

Abstract

A system includes a curved window and a light energy emitter arranged exterior to the curved window. The system includes a light energy receiver arranged exterior to the curved window and arranged to detect light energy emitted by the light energy emitter. The light energy passes over a touchpad provided on the curved window. A touch on the touchpad may be detected by the system.

Claims

1. A system comprising:

a curved window;

a light energy emitter arranged exterior to the curved window;

a light energy receiver arranged exterior to the curved window and arranged to detect light energy emitted by the light energy emitter, the light energy unobstructed by the curved window between the light energy receiver and the light energy emitter; and

the light energy passing over a touchpad provided on the curved window.

2. The system of claim 1, wherein the light energy receiver is arranged to accept the light energy as input and to output respective electrical energy.

3. The system of claim 2, further comprising an electrical circuit arranged to accept the electrical energy as input and to output an electrical signal that has a magnitude proportional to the light energy.

4. The system of claim 3, further comprising a processor having a memory, wherein the processor is programmed to receive the magnitude of the electrical signal and compare the magnitude to a respective predetermined value and output a touch indicator signal based on a difference between the magnitude and the respective predetermined value.

5. The system of claim 4, further comprising an actuator coupled to the curved window, wherein the processor is programmed to output the touch indicator signal to the actuator.

6. The system of claim 4, further comprising a speaker, wherein the processor is programmed to output the touch indicator signal to the speaker.

7. A system comprising:

a curved window;

a touchpad provided on the curved window;

a light energy emitter arranged exterior to the curved window;

a light energy receiver arranged exterior to the curved window and arranged to detect light energy emitted by the light energy emitter, the light energy unobstructed by the curved window between the light energy receiver and the light energy emitter; and

the light energy emitter and receiver each positioned respectively at a first side and a second side of the touchpad.

8. The system of claim 7, wherein the receiver is arranged to accept the light energy as input and to output respective electrical energy.

9. The system of claim 8, further comprising an electrical circuit arranged to accept the electrical energy as input and to output an electrical signal that has a magnitude proportional to the light energy.

10. The system of claim 9, further comprising a processor having a memory, wherein the processor is programmed to receive the magnitude of the electrical signal and compare the magnitude to a respective predetermined value and output a touch indicator signal based on a difference between the magnitude and the respective predetermined value.

11. The system of claim 10, further comprising an actuator coupled to the curved window, wherein the processor is programmed to output the touch indicator signal to the actuator.

12. The system of claim 10, further comprising a speaker, wherein the processor is programmed to output the touch indicator signal to the speaker.

13. A system comprising:

a curved window;

means for emitting light energy;

means for detecting light energy, the light energy emitting means and the light energy detecting means each arranged exterior to the curved window, the light energy unobstructed by the curved window between the light energy detecting means and the light energy emitting means;

means for providing a touchpad on the curved window; and

means for detecting a deflection of the light energy.

14. The system of claim 13, further comprising a window frame defining an opening receiving the curved window, the curved window being moveable along the opening from a closed position to an open position.

15. The system of claim 14, further comprising means for detecting the deflection of the light energy when an obstacle moves into the opening as the curved window is moving from the open position to the closed position.

16. The system of claim 14, further comprising means for detecting the deflection of the light energy when an obstacle moves into the opening.

17. The system of claim 13, further comprising means for providing haptic feedback on the curved window when the touchpad is touched.

18. The system of claim 13, further comprising means for providing audio feedback when the touchpad is touched.