User input device for a computer system

• US 5,914,709 A
• Filed: 03/14/1997
• Issued: 06/22/1999
• Est. Priority Date: 03/14/1997
• Status: Expired due to Term

• Current Assignee: POA Sana Liquidating Trust
• Original Assignee: Poa Sana, LLC
• Inventors: Graham, David S., Francis, Daniel A.
• Primary Examiner(s): Hofsass, Jeffery A.
• Assistant Examiner(s): LIEU, JULIE BICHNGOC
• Application Number:
  US08/818,774
• Time in Patent Office: 830 Days
• Field of Search: 345/175, 345/179, 345/104, 345/173, 345/176
• US Class Current: 345/179
• CPC Class Codes: G02B 2006/12195 Tapering
• CPC Class Codes: G02B 6/32 having lens focusing means positioned between opposed fibre ends with lens being an integral part of the single fibre end G02B6/262
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

A user input device for an electronic device is disclosed. The user input device provides positional information using a grid of light. The grid of light is produced from a light source and waveguides. The grid of light is also received and processed using waveguides and a light detector. Optionally, optics may be used to enhance the operation of the user input device. The user input device is particularly suited for use as a user input device for a computer system or the like.

Claims

1. An apparatus, comprising:

a light source;

a multilayer, multichannel transmission waveguide portion optically coupled to receive light from said light source, said transmission waveguide portion integrally housing a plurality of light transmission waveguides that produce a first set of light beams by guiding the light received from said light source so that said first set of light beams emanate from said light transmission waveguides in a first direction;

a multilayer, multichannel reception waveguide portion spaced apart from said transmission waveguide in the first direction, said reception waveguide portion integrally housing a plurality of light reception waveguides for receiving said first set of light beams emanating from said light transmission waveguides; and

a light detector optically coupled to said reception waveguide portion to receive the light from the light reception waveguides of said reception waveguide portion, said light detector including a plurality of light detecting elements that substantially simultaneously detects light intensity of the light from at least the first set of the light reception waveguides of said reception waveguide portion.

2. An apparatus as recited in claim 1, wherein the light reception waveguides guide the light received from associated ones of said first set of light beams emanating from said light transmission waveguides to said light detector, the guiding being from the first direction to a second direction, the second direction being different than the first direction.

3. An apparatus as recited in claim 2,

wherein said apparatus is an input device for an electronic device, and

wherein between said transmission waveguide portion and said reception waveguide portion an input area is produced.

4. An apparatus as recited in claim 3, wherein a user provides input to the electronic device by interacting with the input area.

5. An apparatus as recited in claim 3, wherein said apparatus is a user input apparatus for a computer system by interacting with the input area.

6. An apparatus as recited in claim 4, wherein the user interacts with the input area with a finger or a stylus.

7. An apparatus as recited in claim 1, wherein said light detector is an integrated circuit having a light sensing area optically coupled to said reception waveguide portion to receive the light from the light reception waveguides of said reception waveguide portion.

8. An apparatus as recited in claim 1,

wherein an input area is provided between said transmission waveguide portion and said reception waveguide portion, and

wherein said apparatus further comprises:

lenses optically positioned proximate to said transmission waveguide portion to collimate said first set of light beams emanating across the input area from the light transmission waveguides towards the corresponding light reception waveguides of said reception waveguide portion.

9. An apparatus as recited in claim 8, wherein said apparatus is an input device for providing user input to a computer system, and

wherein said light detector is an integrated circuit having a light sensing area optically coupled to said reception waveguide portion to receive the light from the light channels of said reception waveguide.

10. An apparatus as recited in claim 1, wherein the light transmission waveguides and the light reception waveguides are lithographically defined waveguides.

11. An apparatus as recited in claim 10, wherein the light transmission waveguides and the light reception waveguides have a rectangular cross-section.

12. An apparatus as recited in claim 11, wherein said transmission waveguide portion is formed of a dielectric material, and said reception waveguide is formed of a dielectric material.

13. An apparatus as recited in claim 1, wherein the light transmission waveguides redirect the light received from said light source in a substantially different direction when producing the first set of light beams.

14. An apparatus as recited in claim 13, wherein said transmission waveguide portion is formed of a dielectric material, and said reception waveguide is formed of a dielectric material.

15. An apparatus as recited in claim 1, wherein said transmission waveguide portion is formed of a dielectric material, and said reception waveguide is formed of a dielectric material.

16. An apparatus as recited in claim 1, wherein the light transmission waveguides redirect the light received from said light source in a curved fashion when producing the first set of light beams.

17. An apparatus as recited in claim 1, wherein said transmission waveguide portion has a one-piece construction that is rectangular, and said reception waveguide portion has a one-piece construction that is rectangular.

18. An apparatus as recited in claim 1, wherein said transmission waveguide portion and said reception waveguide are formed by a polymer material.

19. An apparatus as recited in claim 1, wherein said transmission waveguide portion has a one-piece construction, and said reception waveguide portion has a one-piece construction.

20. An apparatus as recited in claim 1, wherein said apparatus is a high resolution input device whereby at least said first set of light beams are able to be substantially simultaneously directed across an input area from said light source through said light transmission waveguides within said transmission waveguide portion, and then substantially simultaneously received by said light reception waveguides within said reception waveguide portion, and then being directed to the corresponding light detecting elements of said light detector where the light intensity is substantially simultaneously detected.

21. An apparatus as recited in claim 1, wherein said multilayer, multichannel reception waveguide portion includes at least one low index of refraction layer and at least one high index of refraction layer.

22. An apparatus as recited in claim 1, wherein said reception transmission waveguides have a flared out section near a side of said reception waveguide portion where said first set of light beans are received.

30. An input device as recited in claim 12, wherein said waveguide structure includes a plurality of sections.

31. An input device as recited in claim 30, wherein, a first of the waveguide sections produces horizontal light beams, a second of the waveguide sections produces vertical light beams, a third of the waveguide sections disposed opposite to the first of the waveguide sections across the input area receives the horizontal light beams from the first of the waveguide sections, and a fourth of the waveguide sections disposed opposite to the third of the waveguide sections across the input area receives the vertical light beams from the second of the waveguide sections.

23. An input device for an electronic device, comprising:

at least one light source;

a light detector to detect light intensity at a plurality of light detecting elements; and

a lithographically defined multilayer waveguide structure including a plurality of waveguides,

wherein said light source couples light into a first set of the waveguides of said waveguide structure, said first set of waveguides directs the light coupling into the waveguides to produce a grid of light beams from the light coupling into the waveguides, the grid of light beams transverse an input area and are then directed to the light detecting elements of said light detector by a second set of the waveguides of said waveguide structure.

24. An input device as recited in claim 23, wherein the first set of waveguides send beams of light across the input area towards corresponding waveguides of the second set of waveguides.

25. An input device as recited in claim 24, wherein said input device further comprises:

lenses optically positioned proximate to said waveguide structure to collimate the light beams emanating from the first set of waveguides.

26. An input device as recited in claim 23, wherein said input device further comprises:

lenses optically positioned proximate to said waveguide structure to collimate the light beams emanating from the first set of waveguides.

27. An input device as recited in claim 26, wherein said lenses are micro lenses formed in a strip of material that is placed proximate to a light exit side of the first set of waveguides where the light beams emanate.

28. An input device as recited in claim 23, wherein said input device provides user input to a computer system,

wherein the light couples into a first end of the waveguides, and

wherein said light detector is an integrated circuit having a light sensing area optically coupled to receive the light from a second end of the waveguides.

29. An input device as recited in claim 28, wherein the light sensing area of the integrated circuit includes a plurality of photosensitive cells.

32. An input device as recited in claim 23, wherein said waveguide structure includes at least one low index of refraction layer and at least one high index of refraction layer.

33. An input device as recited in claim 23, wherein the electronic device is a computer system having a display device, the display device includes a screen area and a peripheral portion, and wherein said input device is affixed to the peripheral portion of the display device, with the input area of said input device being placed over the screen area of the display device.

34. An apparatus as recited in claim 33, wherein the first set of waveguides redirect the light coupling into the waveguides such that the grid of light beams produced are directed in a substantially different direction than the direction in which the light coupled into the first set of waveguides.

35. An input device as recited in claim 34, wherein said input device further comprises:

lenses optically positioned proximate to said waveguide structure to collimate the light beams emanating from the first set of waveguides.

36. An input device as recited in claim 35, wherein said lithographically defined waveguide structure is a dielectric structure.

37. An input device as recited in claim 23, wherein said lithographically defined waveguide structure is a dielectric structure.

38. An input device as recited in claim 37, wherein said input device further comprises:

lenses optically positioned proximate to said waveguide structure to collimate the light beams emanating from the first set of waveguides.

40. An apparatus as recited in claim 23, wherein the first set of waveguides redirect the light coupling into the waveguides such that the grid of light beams produced are directed in a substantially different direction than the direction in which the light coupled into the first set of waveguides.

39. An input device as recited in clam 37, wherein the dielectric structure is a BCB polymeric material.

41. A method for determining a user'"'"'s input with respect to a high resolution input device, said method comprising:

(a) providing a source of light;

(b) producing a plurality of parallel light beams by guiding light from the source of light through a plurality of paths housed within multichannel one-piece transmission waveguide, the multichannel one-piece transmission waveguide having a multilayer structure;

(c) simultaneously directing the parallel light beams across an input area of the input device, the input area being positioned with respect to the input device;

(d) simultaneously receiving certain of the parallel light beams after having crossed the input area;

(e) substantially concurrently determining light intensity for each of the parallel light beams received; and

(f) determining whether there is a user'"'"'s input with respect to the input area based on the determining light intensity values.

42. A method as recited in claim 41, wherein said method determines a position of the user'"'"'s input with respect to the input device, and

wherein said method further comprises:

(g) determining a position of the user'"'"'s input with respect to the input device based on the determined light intensity values.

43. A method as recited in claim 41, wherein said producing (b) of the parallel light beams includes guiding light from the source of light through a plurality of curved paths of the multichannel one-piece transmission waveguide.