CONTROL SYSTEM FOR ACTIVE WINDOW GLASS MANAGING THE COLOUR OF THE LIGHT IN A BUILDING

• US 20130264948A1
• Filed: 12/14/2011
• Published: 10/10/2013
• Est. Priority Date: 12/16/2010
• Status: Active Grant

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Nicolas, David, Orillard, Julien
• Granted Patent: US 9,226,366 B2
• Time in Patent Office: Days
• US Class Current: 315/155
• CPC Class Codes: H05B 45/22 using optical feedback
• CPC Class Codes: H05B 47/10 Controlling the light source

Abstract

The present invention relates to a lighting control system, comprising a control unit comprising a memory in which control programs are recorded.

The control programs are capable of controlling the optical transmission through an active window pane with electro-controllable optical transmission properties and are capable of controlling an electro-controllable lighting device.

The system furthermore comprises a coloration sensor for measuring a value representative of a coloration of the light.

The control programs are capable of controlling the lighting generated by the lighting device as a function of the value supplied by the coloration sensor.

Claims

1. A lighting control system (1), comprising:

a control unit (10) comprising a memory (12) in which control programs are recorded, the control programs being capable of controlling the optical transmission through an active glass pane (2) with electro-controllable optical transmission properties, the control programs being capable of controlling an electro-controllable lighting device (4); and

a coloration sensor (14) for measuring a value representative of a coloration of the light and supplying this value to the control unit (10), the control programs being capable of controlling the lighting generated by the lighting device (4) as a function of the value supplied by the coloration sensor (14).

2. The system (1) as claimed in claim 1, in which the control programs are capable of controlling the lighting device (4) so that it generates an illumination whose coloration is such that the lighting generated by the lighting device (4) comes close to the coloration of the light measured by the sensor (14) measuring coloration of a reference value.

3. The system (1) as claimed in claim 1, in which the control programs are capable of controlling the lighting device (4) in order to generate different colored lighting effects depending on the value supplied by the coloration sensor (14).

4. The system (1) as claimed in claim 1, in which the lighting device (4) comprises an artificial source of light.

5. The system (1) as claimed in claim 4, in which the lighting device (4) comprises at least one color LED, preferably several different color LEDs, the control programs being capable of controlling the intensity of the lighting of the at least one color LED as a function of the value supplied by the coloration sensor (14).

6. The system (1) as claimed in claim 1, in which the lighting device (4) comprises a reflector reflecting the outside light toward the inside in an electro-controllable manner, for example an electro-controllable and reflecting venetian blind.

7. The system (1) as claimed in claim 1, in which the control programs are capable of controlling the optical transmission through the active window pane (2) as a function of the value supplied by the coloration sensor (14).

8. The system (1) as claimed in claim 1, in which the control programs are capable of controlling several active window panes (2) with electro-controllable optical transmission properties, the control programs being capable of controlling said active window panes (2) in such a manner that one of said active window panes (2) receives an optical transmission setpoint value different from that of another of said active window panes (2).

9. The system (1) as claimed in claim 1, in which the coloration sensor (14) supplies a CRI value or a value representative of at least a* or b* of the (L*,a*,b*) coloration system or a value representative of at least X, Y or Z of the (X,Y,Z) system or a value representative of at least u* or v* of the (L*,u*,v*) system.

10. The system (1) as claimed in claim 1, comprising a brightness sensor for supplying a value representative of brightness, the control programs being capable of controlling the optical transmission through the active window pane (2) as a function of the value representative of brightness supplied by the brightness sensor.

11. The system (1) as claimed in claim 1, comprising a temperature sensor for supplying a value representative of temperature, the control programs being capable of controlling the optical transmission through said active window pane (2) as a function of the value representative of temperature supplied by the temperature sensor.

12. The system (1) as claimed in claim 1, comprising a glare level sensor for supplying a value representative of glare level, the control programs being capable of controlling the optical transmission through said active window pane (2) as a function of the value representative of glare level supplied by the glare level sensor.

13. An assembly comprising an active window pane (2) with electro-controllable optical transmission properties, a lighting device (4) and a control system (1) for controlling the active window pane (2) and the lighting device (4), the control system being as claimed in claim 1.

14. A method for controlling an active window pane with electro-controllable optical transmission properties and a lighting device (4) comprising steps consisting in:

using a coloration sensor (14) for measuring a value representative of coloration of a light;

controlling the lighting generated by the lighting device (4) as a function of the value supplied by the coloration sensor (14).

15. The method as claimed in claim 14, the step consisting in controlling the lighting generated consists in controlling the lighting device (4) so that it generates an illumination whose spectral distribution is such that the lighting generated by the lighting device (4) neutralizes, at least partially, the shift of the spectral distribution of the light transmitted through the at least one active window pane (2).