DATA TRANSMISSION WITH ROOM ILLUMINATIONS HAVING LIGHT EMITTING DIODES

• US 20100254714A1
• Filed: 09/02/2008
• Published: 10/07/2010
• Est. Priority Date: 09/11/2007
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Gaete Jamett, Oscar Cristobal, Rohde, Harald, Randel, Sebastian
• Granted Patent: US 8,811,826 B2
• Time in Patent Office: Days
• US Class Current: 398/183
• CPC Class Codes: H04B 10/1149 Arrangements for indoor wireless networking of information

Abstract

Lamps having light emitting diodes configured for data transmission require the high-frequency circuit of higher power. In order to simplify the required electronics, the light emitting diodes are divided into groups and the groups are modulated differently. Due to the multilevel modulation, the symbol rate can be reduced with the data rate remaining the same, thus reducing the switching rate and the circuitry complexity.

Claims

1. A method for transmitting data by means of a plurality of light emitting diodes, comprising the steps of:

transmitting the data by means of modulation of the intensity of the light emitting diodes;

grouping the light emitting diodes into at least two groups;

modulating the light emitting diodes of each group; and

tuning the modulations of the groups to one another such that the data are encoded according to the modulations.

2. The method according to claim 1, wherein for encoding the data, a number of groups which can be stipulated on the basis of the data is modulated.

3. A method for room illumination and transmitting data by means of a plurality of light emitting diodes, comprising the steps of:

operating the light emitting diodes at a substantially constant intensity for room illumination wherein for transmitting the data, a method according to claim 1 is used.

4. The method according to claim 3, wherein the light emitting diodes are grouped together into groups such that the light emitting diodes of each group are as evenly distributed as possible over the total extent of an illumination body, particularly lamp, formed by the light emitting diodes.

5. A method for transmitting data by means of a plurality of light emitting diodes, wherein the data is transmitted by means of a method according to claim 1 and are received by a receiving apparatus.

6. A method for room illumination and transmitting data by means of a plurality of light emitting diodes, wherein the light emitting diodes are operated for room illumination and transmitting the information using a method according to claim 3 and the data is received by a receiving apparatus.

12. The method according to claim 1, wherein each light emitting diode of a group is modulated by the same modulation.

13. The method according to claim 1, wherein the data is transmitted by means of visually imperceptible modulation.

14. The method according to claim 1, wherein for encoding the data, a number of groups which can be stipulated on the basis of the data is modulated dark or modulated light.

15. The method according to claim 5, wherein the receiving apparatus is a PC, a mobile telephone or a PDA.

7. An arrangement for transmitting data comprising a plurality of light emitting diodes, configured such that the data is transmitted by means of modulation of the intensity of the light emitting diodes, wherein

the light emitting diodes are grouped together into at least two groups;

the light emitting diodes of each group are modulated; and

the modulations of the groups are tuned to one another such that the data is encoded according to the modulations.

8. The arrangement for room illumination and transmitting data comprising a plurality of light emitting diodes according to claim 7, wherein the light emitting diodes are arranged in one or more lamps, configured such that the light emitting diodes are operated for room illumination at a substantially constant intensity.

9. The arrangement according to claim 8, wherein the light emitting diodes are grouped into groups such that the light emitting diodes of each group are as evenly distributed as possible over the total extent of the lamp.

10. An arrangement for transmitting data comprising:

a plurality of light emitting diodes according to claim 7; and

a receiving apparatus;

configured such that the data transmitted by means of the light emitting diodes can be received by the receiving apparatus.

11. An arrangement for room illumination and transmitting data, comprising an arrangement for transmitting data according to claim 10, wherein the light emitting diodes are arranged in one or more lamps, configured such that the light emitting diodes are operated for room illumination at a substantially constant intensity.

16. The arrangement according to claim 7, wherein each light emitting diode of a group is modulated by the same modulation.

17. The arrangement according to claim 7, wherein the data is transmitted by means of visually imperceptible modulation.

18. The arrangement according to claim 10, wherein the receiving apparatus is a PC, a mobile telephone or a PDA.

19. An arrangement for transmitting data comprising:

a plurality of light emitting diodes, wherein the light emitting diodes are grouped together into at least two groups;

the light emitting diodes of each group are modulated; and

the modulations of the groups are tuned to one another such that the data is encoded.

20. An system for room illumination and transmitting data comprising the arrangement according to claim 19, wherein the light emitting diodes are arranged in one or more lamps, configured such that the light emitting diodes are operated for room illumination at a substantially constant intensity.