Keyboard including movement activated optical keys and related methods

• US 9,264,037 B2
• Filed: 09/23/2011
• Issued: 02/16/2016
• Est. Priority Date: 11/30/2010
• Status: Active Grant

• Current Assignee: STMicroelectronics Limited (STMicroelectronics NV)
• Original Assignee: STMicroelectronics Limited (STMicroelectronics NV)
• Inventors: Stark, Laurence
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Assistant Examiner(s): Lin, Chun-Nan
• Application Number:
  US13/243,654
• Publication Number:
  US 20120162081A1
• Time in Patent Office: 1,607 Days
• Field of Search: 345/168
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/0338 Fingerprint track pad, i.e. fingerprint sensor used as pointing device tracking the fingertip image
• CPC Class Codes: G06F 2203/04109 FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
• CPC Class Codes: G06F 3/0202 Constructional details or processes of manufacture of the input device
• 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 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
• CPC Class Codes: H03K 17/943 using a plurality of optical emitters or detectors, e.g. keyboard
• CPC Class Codes: H03K 17/9629 using a plurality of detectors, e.g. keyboard

Abstract

A keyboard may include a plurality of optical keys. Each optical key may include an optical module and an interaction surface. The optical key may be configured to be activated based on movement of an object on or adjacent the interaction surface. Each movement may produce a different output from the optical module to thereby generate a predetermined input for a device.

Claims

1. A keyboard comprising:

a plurality of optical keys, each optical key comprising an optical module, and an interaction surface;

each of said plurality of optical keys being configured to be activated based upon movement of a user'"'"'s finger on or in a vicinity of the interaction surface;

said optical module being configured to

generate two images of the user'"'"'s finger based upon the user'"'"'s finger being on or in the vicinity of the interaction surface, the two images defining different finger ridge deformation patterns,

track movement of the user'"'"'s finger based upon the different finger ridge deformation patterns by at least

determining when the tracked movement of the user'"'"'s finger corresponds to a swipe movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger, and

determining when the tracked movement of the user'"'"'s finger corresponds to a key press movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger, and

produce a first output when the tracked movement of the user'"'"'s finger corresponds to the swipe movement and produce a second output different than the first output when the tracked movement corresponds to the key press movement.

2. The keyboard according to claim 1, further comprising a key event handler configured to receive the different outputs from each optical module and determine a sequence of movements and associated keys based upon the different outputs.

3. The keyboard according to claim 2, wherein said key event handler is configured to generate an output based upon the sequence of movements and associated keys.

4. The keyboard according to claim 2, further comprising a bus;

and wherein said optical modules are electrically coupled in parallel with each other to said key event handler via said bus.

5. The keyboard according claim 2, further comprising a bus;

and wherein said optical modules are electrically connected in a daisy-chained serial configuration to said key event handler via said bus.

6. The keyboard according to claim 2, wherein said plurality of optical keys are arranged in a single continuous sensing area;

and wherein said key event handler is configured to determine, for navigational purposes, one of the movement and position of the user'"'"'s finger in the single continuous sensing area.

7. The keyboard according to claim 6, wherein said key event handler is configured to interpolate the position of the user'"'"'s finger moving over the single continuous sensing area when the user'"'"'s finger is between two specific optical keys.

8. The keyboard according to claim 7, wherein said key event handler is configured to derive a speed of movement of the user'"'"'s finger and interpolate the position of the user'"'"'s finger based upon the speed of movement.

9. The keyboard according to claim 1, wherein said optical module is configured to be activated by at least one of detection of a position of the user'"'"'s finger relative to the interaction surface, detection of movement of the user'"'"'s finger, and detection of a direction of movement of the user'"'"'s finger.

10. The keyboard according to claim 1, wherein said optical module comprises a photo detector array.

11. The keyboard according to claim 1, further comprising an illumination source configured to illuminate the interaction surface.

12. The keyboard according to claim 1, wherein said optical module comprises a waveguide layer.

13. The keyboard according to claim 1, further comprising a comparator configured to determine a motion vector from the two images based on differences between the two images.

14. An electronic device comprising:

a keyboard comprising

a plurality of optical keys, each comprising an optical module, and an interaction surface,

each of said plurality of optical keys being configured to be activated based upon movement of a user'"'"'s finger on or in vicinity of the interaction surface,

said optical module being configured to

generate two images of the user'"'"'s finger based upon the user'"'"'s finger being on or in the vicinity of the interaction surface, the two images defining different finger ridge deformation patterns,

track movement of the user'"'"'s finger based upon the different finger ridge deformation patterns by at least

determining when the tracked movement of the user'"'"'s finger corresponds to a swipe movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger, and

determining when the tracked movement of the user'"'"'s finger corresponds to key press movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger, and

produce a first output when the tracked movement of the user'"'"'s finger corresponds to the swipe movement and produce a second output different than the first output when the tracked movement corresponds to the key press movement and generate an input for a device.

15. The electronic device according to claim 14, further comprising a key event handler configured to receive the different outputs from each optical module and determine a sequence of movements and associated keys based upon the different outputs.

16. The electronic device of claim 14, wherein the electronic device defines a computer.

17. The electronic device of claim 14, wherein the electronic device defines a telephone.

18. A method of generating an output from a keyboard, the keyboard comprising a plurality of optical keys each comprising an optical module and an interaction surface, each of the plurality of optical keys being configured to be activated based upon movement of a user'"'"'s finger adjacent the interaction surface, the method comprising:

generating, when at least one of the plurality of optical modules has been activated by movement of the user'"'"'s finger on or in the vicinity of the interaction surface, two images of the user'"'"'s finger, the two images defining different finger ridge deformation patterns;

tracking movement of the user'"'"'s finger based upon the different finger ridge deformation patterns by at least

determining when the tracked movement of the user'"'"'s finger corresponds to a swipe movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger, and

determining when the tracked movement of the user'"'"'s finger corresponds to a key press movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger; and

from each optical module, generating a first output when the tracked movement of the user'"'"'s finger corresponds to the swipe movement and generating a second output different than the first output when the tracked movement corresponds to the key press movement.

19. The method according to claim 18, further comprising passing the different outputs from each of the optical modules to a key event handler to determine a sequence of movements and associated keys.

20. The method according to claim 19, wherein the key events handler generates an output based on the sequence of movements and associated keys.

21. The method according to claim 18, wherein the plurality of optical keys are arranged in a single continuous sensing area;

and wherein the method comprises determining at least one of the movement and a position of the user'"'"'s finger in the single continuous sensing area for navigational purposes.

22. The method according to claim 21, further comprising interpolating the position of the user'"'"'s finger moving over the single continuous sensing area when the user'"'"'s finger is between two optical modules.

23. The method according to claim 22, further comprising deriving a speed of movement of the user'"'"'s finger and using the speed of movement of the user'"'"'s finger to interpolate the position of the user'"'"'s finger.

24. A non-transitory computer-readable medium for generating an output from a keyboard, the keyboard comprising a plurality of optical keys each comprising an optical module and an interaction surface, each of the plurality of optical keys being configured to be activated based upon movement of a user'"'"'s finger adjacent the interaction surface, the non-transitory computer-readable medium having computer-executable instructions for causing the keyboard to perform steps comprising:

generating, when at least one of the plurality of optical modules has been activated by movement of the user'"'"'s finger on or in the vicinity of the interaction surface, two images of the user'"'"'s finger, the two images defining different finger ridge deformation patterns;

tracking movement of the user'"'"'s finger based upon the different finger ridge deformation patterns by at least

determining when the tracked movement of the user'"'"'s finger corresponds to a swipe movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger, and

determining when the tracked movement of the user'"'"'s finger corresponds to a key press movement based upon the different finger ridge deformation patterns caused by application of pressure by the user'"'"'s finger; and

generating a first output when the tracked movement of the user'"'"'s finger corresponds to the swipe movement and generating a second output different than the first output when the tracked movement corresponds to the key press movement.

25. The non-transitory computer-readable medium according to claim 24, wherein the computer-executable instructions are for causing the keyboard to perform the step of passing the different outputs from each of the optical modules to a key event handler to determine a sequence of movements and associated keys.

26. The non-transitory computer-readable medium according to claim 25, wherein the computer-executable instructions are for causing the keyboard to perform the step of generating outputs based upon the sequence of movements and associated keys.

27. The non-transitory computer-readable medium to claim 24, wherein the plurality of optical keys are arranged in a single continuous sensing area;

and wherein the computer-executable instructions are for causing the keyboard to perform the step of determining at least one of the movement and a position of the user'"'"'s finger in the single continuous sensing area for navigational purposes.

28. The non-transitory computer-readable medium according to claim 27, wherein the computer-executable instructions are for causing the keyboard to perform the step of interpolating the position of the user'"'"'s finger moving over the single continuous sensing area when the user'"'"'s finger is between two optical modules.

29. The non-transitory computer-readable medium according to claim 28, wherein the computer-executable instructions are for causing the keyboard to perform the step of deriving the speed of movement of the user'"'"'s finger and using the speed of movement of the user'"'"'s finger to interpolate the position of the user'"'"'s finger.