POINT TO POINT OPTICAL COMMUNICATION SYSTEM FOR CONVEYING SIGNALS BETWEEN MULTIPLE HOUSINGS OF A DEVICE

• US 20080138078A1
• Filed: 12/06/2006
• Published: 06/12/2008
• Est. Priority Date: 12/06/2006
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: ZEIGER, DAVID R., SCHELLINGER, MICHAEL W., BARABOLAK, MARK A., DIETRICH, AARON L., SEHMBEY, MANINDER S., ALAMEH, RACHID M.
• Granted Patent: US 8,267,598 B2
• Time in Patent Office: Days
• US Class Current: 398/140
• CPC Class Codes: H04B 10/1143 Bidirectional transmission

Abstract

An optical communication system is provided for conveying signals between multiple housing elements of a device, where respective optical detectors and optical light sources interact via respective point to point communication paths, where the point to point communication path is maintained while the multiple housing elements of the device move relative to one another. In at least some instances, the multiple housing elements correspond to at least a pair of housing elements that are incorporated as part of a communication device having a slider configuration. In some of the same or still further instances, the point to point communication paths correspond to channels formed between the multiple housing elements, which in some instances may be at least partially recessed within one or both of the housing elements. In some instances the channels may traverse free space. In still further instances the channel may include a light pipe.

Claims

1. An optical communication system for conveying signals between a first and a second housing element of a device, where the first and second housing elements are adapted to move relative to one another, the communication system comprising:

one or more optical light sources, each optical light source being coupled to one of the first and second housing elements; and

one or more optical detectors, each optical detector corresponding to a respective one of the one or more optical light sources between which an optical communication connection via a respective one of one or more point to point communication paths is established, each of the one or more optical detectors being coupled to the other one of the first and second housing element, to which the respective corresponding optical light source is not coupled; and

wherein as the housing elements move relative to one another, the corresponding one or more optical light sources move relative to the corresponding respective one of the one or more optical detectors, while maintaining the point to point communication connection.

2. An optical communication system of claim 1 wherein the first and second housing elements travel along respective substantially parallel paths.

3. An optical communication system of claim 1 wherein the first and second housing elements are incorporated as part of a communication device having a slider configuration.

4. An optical communication system of claim 3 wherein the communication device is a radio telephone.

5. An optical communication system of claim 1 wherein at least some of the one or more communication paths travel along respective channels.

6. An optical communication system of claim 5 wherein one or more of the channels are at least partially recessed into at least one of the first and second housing elements.

7. An optical communication system of claim 5 wherein at least some of the channels include one or more optically reflective surfaces

8. An optical communication system of claim 5 wherein at least some of the channels include a light pipe.

9. An optical communication system of claim 8 wherein the light pipe includes at least two segments, which laterally move concentrically relative to one another, where the amount of the length of overlap between the two segments varies with the lateral concentric movement.

10. An optical communication system of claim 9 wherein the light pipe further includes a tension device, which variably biases the two segments relative to one another as the amount of overlap between the two segments changes.

11. An optical communication system of claim 10 wherein the bias applied to the two segments of the light pipe biases the first and the second housing elements toward one of an open or a closed position.

12. An optical communication system of claim 10 wherein the tension device is a spring.

13. An optical communication system of claim 8 wherein the light pipe includes a plurality of optically discrete conduits adapted to separately form a different point to point communication path.

14. An optical communication system of claim 8 wherein the light pipe includes a pair of end points, and wherein at least one of the end points a lens is coupled thereto for adjusting the path of the optical light entering or exiting the light pipe.

15. An optical communication system of claim 1 wherein each of the first and second housing elements include a respective substrate to which respective ones of the one or more optical light sources and the one or more optical detectors are coupled;

and

wherein the optical communication system further comprises one or more angled reflective surfaces, which are adapted for redirecting an optical signal between respective point to point communication paths and respective ones of the one or more optical light sources and the one or more optical detectors coupled to the respective substrate.

16. An optical communication system of claim 1 wherein each of the first and second housing elements include a respective substrate to which respective ones of the one or more optical light sources and the one or more optical detectors are coupled;

and

wherein one or more of the optical light sources and the optical detectors extend into the respective communication path from the respective substrate.

17. An optical communication system of claim 16 wherein the at least some of the one or more of the optical light sources and the optical detectors, which extend into the respective communication path from the respective substrate, are coupled to the respective substrate via a spacer.

18. An optical communication system of claim 17 wherein the respective substrates for each of the first and second housing elements include a main printed circuit substrate, and the spacer includes a further printed circuit substrate that is coupled to the main printed circuit substrate.

19. A wireless communication device comprising:

a two part housing including a first housing element and a second housing element adapted to move relative to one another; and

an optical communication system for conveying signals between the first housing element and the second housing element, the communication system including

one or more optical light sources, each optical light source being coupled to one of the first and second housing elements, and

one or more optical detectors, each optical detector corresponding to a respective one of the one or more optical light sources between which an optical communication connection via a respective one of one or more point to point communication paths is established, each of the one or more optical detectors being coupled to the other one of the first and second housing element, to which the respective corresponding optical light source is not coupled; and

wherein as the housing elements move relative to one another, the corresponding one or more optical light sources move relative to the corresponding respective one of the one or more optical detectors, while maintaining the point to point communication connection.

20. A wireless communication device of claim 19 wherein the first and second housing elements are incorporated as part of a communication device having a slider configuration.