LIGHTING CONTROL SYSTEM

• US 20140049166A1
• Filed: 04/23/2013
• Published: 02/20/2014
• Est. Priority Date: 08/16/2012
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: YOON, Jae Hun
• Granted Patent: US 9,210,770 B2
• Time in Patent Office: Days
• US Class Current: 315/151
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

Disclosed is a lighting control system including an object lighting control device and at least one reference lighting control device. The object lighting control device generates an object brightness control signal to control an object brightness of an object lighting device provided in an object district using a sensed result of an object illuminance around the object lighting device as well as reference data. The reference lighting control device generates a reference brightness control signal to control a reference brightness of a reference lighting device provided in a reference district using a sensed result of a reference illuminance around the reference lighting device, and transmits at least one of the reference illuminance and the reference brightness as the reference data to the object lighting control device in response to a request of the object lighting control device.

Claims

1. A lighting control system, comprising:

an object lighting control device that generates an object brightness control signal to control an object brightness of an object lighting device provided in an object district using a sensed result of an object illuminance around the object lighting device and using reference data; and

at least one reference lighting control device that generates a reference brightness control signal to control a reference brightness of a reference lighting device provided in a reference district using a sensed result of a reference illuminance around the reference lighting device, and that transmits at least one of the reference illuminance and the reference brightness as the reference data to the object lighting control device in response to a request of the object lighting control device.

2. The lighting control system according to claim 1, wherein the object lighting control device calibrates at least one of the object illuminance and the object brightness using at least one of an illuminance comparison result between the object illuminance and the reference illuminance and a brightness comparison result between the reference brightness and the object brightness, and

wherein the object lighting control device generates the object brightness control signal using at least one of the calibrated object illuminance and object brightness.

3. The lighting control system according to claim 2, wherein the object lighting control device calibrates the object illuminance using the reference illuminance when the illuminance comparison result shows that a difference between the object illuminance and the reference illuminance diverges from a first allowable deviation range.

4. The lighting control system according to claim 3, wherein the object lighting control device calibrates the object illuminance by performing the following calculation at least one time until a deviation between an average value of the object illuminance and the reference illuminance and the reference illuminance enters the first allowable deviation range;

5. The lighting control system according to claim 2, wherein the object lighting control device calibrates the object brightness using the reference brightness if the brightness comparison result shows that a difference between the object brightness and the reference brightness diverges from a second allowable deviation range.

6. The lighting control system according to claim 5, wherein the object lighting control device calibrates the object brightness by performing the following calculation at least one time until a difference between the calibrated object brightness and the reference brightness enters the second allowable deviation range;

7. The lighting control system according to claim 3, wherein the at least one reference lighting control device includes a plurality of reference lighting control devices, and

wherein the object lighting control device calibrates the object illuminance using an average value of a plurality of reference illuminances sensed by the plurality of reference lighting control devices.

8. The lighting control system according to claim 5, wherein the at least one reference lighting control device includes a plurality of reference lighting control devices, and

wherein the object lighting control device calibrates the object brightness using an average value of a plurality of reference brightnesses output from the plurality of reference lighting control devices.

9. The lighting control system according to claim 3, wherein the at least one reference lighting control device includes a plurality of reference lighting control devices, and

wherein the object lighting control device calibrates the object illuminance using an average value of highest-frequency reference illuminances among a plurality of reference illuminances sensed by the plurality of reference lighting control devices.

10. The lighting control system according to claim 5, wherein the at least one reference lighting control device includes a plurality of reference lighting control devices, and

wherein the object lighting control device calibrates the object brightness using an average value of highest-frequency reference brightnesses among a plurality of reference brightnesses output from the plurality of reference lighting control devices.

11. The lighting control system according to claim 2, wherein the object lighting control device transmits a lighting control request signal in response to at least one of the illuminance comparison result and the brightness comparison result, and

wherein the reference lighting control device transmits the reference brightness control signal as the object brightness control signal to the object lighting device in response to the lighting control request signal.

12. The lighting control system according to claim 11, wherein the object lighting control device transmits an inherent identification signal of the reference lighting control device to the object lighting device when transmitting the lighting control request signal to the reference lighting control device, and

wherein the object lighting device allows control of the reference lighting control device that is recognized based on the identification signal.

13. The lighting control system according to claim 1, wherein the object lighting control device includes:

an object illuminance sensing unit configured to sense the object illuminance;

an object control unit configured to generate the object brightness control signal using the sensed object illuminance and the reference data; and

an object communication unit configured to transmit the object brightness control signal to the object lighting device.

14. The lighting control system according to claim 13, wherein the object lighting control device further includes an object signal conversion unit that amplifies the object illuminance sensed by the object illuminance sensing unit and convert a form of the object illuminance into a form of voltage or frequency and that outputs the converted object illuminance, and

wherein the object control unit generates the object brightness control signal using the converted object illuminance and the reference data.

15. The lighting control system according to claim 13, wherein the object control unit generates the object brightness control signal in the form of a pulse width modulation signal.

16. The lighting control system according to claim 1, wherein the reference lighting control device includes:

a reference illuminance sensing unit configured to sense the reference illuminance;

a reference control unit configured to generate the reference brightness control signal using the sensed reference illuminance; and

a reference communication unit configured to transmit the reference brightness control signal to the reference lighting device.

17. The lighting control system according to claim 16, wherein the reference lighting control device further includes a reference signal conversion unit that amplifies the reference illuminance sensed by the reference illuminance sensing unit and converts a form of the reference illuminance into a form of voltage or frequency and that outputs the converted reference illuminance, and

wherein the reference control unit generates the reference brightness control signal using the converted reference illuminance.

18. The lighting control system according to claim 13, wherein the object lighting control device further includes a storage unit configured to store the implementation number of calibration of at least one of the object illuminance and the object brightness.

19. The lighting control system according to claim 18, wherein the lighting control system manages the object lighting device using the implementation number of calibration stored in the storage unit.

20. A lighting control system comprising:

an object lighting control device that generates a lighting control request signal using a sensed result of an object illuminance around an object lighting device provided in an object district and using reference data; and

a reference lighting control device that generates a reference brightness control signal to control a reference brightness of a reference lighting device provided in a reference district using a sensed result of a reference illuminance around the reference lighting device, and that outputs the reference brightness control signal as an object brightness control signal to control a brightness of the object lighting device to the object lighting control device in response to the lighting control request signal received from the object lighting control device.