Light pad charger for electronic devices

• US 20070069684A1
• Filed: 09/28/2005
• Published: 03/29/2007
• Est. Priority Date: 09/28/2005
• Status: Abandoned Application

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Inventors: Ramsden, Martin
• Application Number:
  US11/236,999
• Publication Number:
  US 20070069684A1
• Time in Patent Office: Days
• US Class Current: 320/101
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

A light emitting charger is provided. The light emitting charger delivers light energy to a portable electronic device having a rechargeable battery. The electronic device is equipped with a photovoltaic energy conversion device that converts the transferred light into an electrical current that can be used to charge the battery. Through alternate communication mechanisms, the electronic device can alert the charger as to when to illuminate the light sources and which light sources to illuminate. The charger is equipped with photo detectors for receiving photo communication from the electronic device. In one embodiment, the charger periodically pulses one or more light sources until it receives light reflected from reflective material disposed along the electronic device. When the reflective light is received, the charger may actuate a plurality of light sources in a predetermined pattern corresponding to the amount or location of the reflective light. In another embodiment, the electronic device is equipped with a photo communication light source, and may communicate with the charger through pulsed light.

Claims

1. A battery charger, comprising:

a. a first surface upon which an electronic device may be placed;

b. at least one light source capable of projecting light from the first surface;

c. at least one photo detector capable of receiving light reflected from the electronic device; and

d. a power supply coupled to the charger;

wherein while the at least one photo detector receives light from the at least one light source that has been reflected from the electronic device, the at least one light source continues to emit light.

2. The battery charger of claim 1, further comprising the electronic device, wherein the electronic device comprises a reflective material disposed along a surface of the electronic device.

3. The battery charger of claim 2, wherein the at least one light source periodically projects light from the first surface when the at least one photo detector does not receive light from the at least one light source that has been reflected from the reflective material.

4. The battery charger of claim 3, wherein the at least one light source comprises a plurality of light sources disposed across the first surface, further wherein the at least one photo detector comprises a plurality of photo detectors disposed across the first surface.

5. The battery charger of claim 4, wherein when the plurality of light sources periodically projects light from the first surface and any of the plurality of photo detectors receives light reflected from the reflective material, the battery charger causes a subset of the plurality of light sources to project light, the subset corresponding to a predetermined pattern associated with an amount of light reflected from the reflective material.

6. A light pad for charging rechargeable batteries, the light pad comprising:

a. a plurality of light sources;

b. a plurality of photo detectors dispersed among the plurality of light sources; and

c. a microprocessor capable of actuating any of the plurality of light sources;

wherein when any of the plurality of photo detectors receives a photo communication from an electronic device, the microprocessor actuates a subset of the plurality of light sources.

7. The light pad of claim 6, further comprising a surface upon which the electronic device, having a rechargeable battery coupled thereto, may be placed.

8. The light pad of claim 7, wherein the microprocessor periodically actuates at least one of the plurality of light sources.

9. The light pad of claim 8, wherein when the microprocessor periodically actuates the at least one of the plurality of light sources and the photo communication comprises reflected light from a reflective material disposed along a surface of the electronic device, the microprocessor actuates a subset of the plurality of light sources, the subset corresponding to a predetermined pattern associated with the reflective material.

10. The light pad of claim 9, wherein any of the plurality of light sources are selected from the group consisting of light bulbs, light emitting diodes, lasers, laser diodes, infrared lamps, ultraviolet lamps, and combinations thereof.

11. A system for charging a rechargeable battery, the system comprising:

a. a portable electronic device having the rechargeable battery coupled thereto; and

b. a light emitting charger, the light emitting charger comprising;

i. a planar surface for supporting the portable electronic device;

ii. at least one light source capable of emitting light from the planar surface towards the portable electronic device;

iii. at least one photo detector capable of receiving light from the planar surface; and

iv. a controller capable of selectively actuating the at least one light source;

wherein the controller actuates the at least one light source and continues to do so as long as the at least one photo detector receives photo information from the planar surface.

12. The system of claim 11, wherein the portable electronic device comprises a reflective material disposed along at least one portion of a surface of the electronic device.

13. The system of claim 12, wherein the at least one light source comprises a plurality of light sources disposed along the planar surface, further wherein the at least one photo detector comprises a plurality of photo detectors disposed along the planar surface.

14. The system of claim 13, wherein when the controller actuates any of the plurality of light sources and light reflected from the reflective material is received by any of the plurality of photo detectors, the controller causes a subset of the plurality of light sources to actuate, the subset comprising a predetermined configuration corresponding to an amount of light reflected from the reflective material.

15. The system of claim 11, wherein the portable electronic device comprises a communication light source capable of transmitting informational messages.

16. The system of claim 15, wherein when the at least one photo detector receives an informational message from the portable electronic device, the controller actuates the at least one light source.

17. The system of claim 16, wherein the at least one light source comprises a plurality of light sources, further wherein when the at least one photo detector receives the informational message from the portable electronic device, the controller actuates a subset of the plurality of light sources as directed by the informational message.

18. The system of claim 11, wherein the portable electronic device comprises a lens for concentrating received light upon an electronic device photo detector.

19. The system of claim 11, wherein the light emitting charger comprises a lens array disposed over the at least one light source.