Light control system and method for automatically rendering a lighting scene

• US 8,412,359 B2
• Filed: 11/03/2008
• Issued: 04/02/2013
• Est. Priority Date: 11/06/2007
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Boleko Ribas, Salvador Expedito
• Primary Examiner(s): HARTMAN JR, RONALD D
• Application Number:
  US12/740,375
• Publication Number:
  US 20100259197A1
• Time in Patent Office: 1,611 Days
• Field of Search: 700 11- 12, 700/19, 700 28- 29, 700/54
• US Class Current: 700/54
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]
• CPC Class Codes: H05B 47/20 Responsive to malfunctions or to light source life; for protection

Abstract

The invention relates to the automatic rendering of a lighting scene with a lighting system, particularly the control of the rendering. A basic idea of the invention is to improve rendering of a lighting scene by automatically compensating interference, such as an alien light source or a dynamic perturbing event of a rendered lighting scene. An embodiment of the invention provides a light control system (10) for automatically rendering a lighting scene with a lighting system, wherein the light control (10) system is adapted for monitoring the rendered lighting scene for the occurrence of interference (14, 20, 22, 24) and automatically reconfiguring the lighting system such that a monitored occurrence of an interference is compensated (16, 18, 12). As result, the invention allows to prevent dynamic disturbances or unforeseen events, for example caused by faulty or alien light sources, from distorting the rendering of an intended lighting scene.

Claims

1. A light control method for automatically rendering a lighting scene with lighting system, comprising:

monitoring the rendered lighting scene for the occurrence of an interference, comprising;

scanning the rendered lighting scene including taking samples at given measurement points over a period of time; and

detecting a significant deviation of the scanned lighting scene with respect to a reference lighting scene by processing the samples including comparing the samples with reference values, wherein the comparing comprises one of the following;

averaging over regions of interest a computed difference between readings of a user-tuned lighting scene and the rendered lighting scene, low-pass filtering the computed difference, and comparing the low-pass filtered computed difference with a threshold value in order to determine whether a significant variation in the mean of samples has occurred during the last observed periods of time;

or

defining a time window embracing the last periods of time previous to a current sample, estimating a predictor from the samples taken during the defined time window, running a generalised likelihood ratio test, and comparing the result of the generalised likelihood ratio test with a threshold value in order to determine whether a change has occurred in the monitored magnitude over a certain region of interest; and

automatically reconfiguring the lighting system such that a monitored occurrence of an interference is compensated.

2. The method according to claim 1, wherein the step of automatically reconfiguring of the lighting system comprises:

triggering a process of characterisation of an interference from the detected significant deviation, and

performing a computation of configuration settings for the lighting system to counteract the characterized interference depending on the characterisation.

3. The method of claim 2, further comprising photometric characteristic plots or mathematical models derived therefrom, which characterize the behaviour of the hardware of the lighting system to be controlled.

4. The method of claim 3 wherein the photometric characteristic plots or models provide the relationship between configuration settings of light modules of the lighting system and an expected output of the light modules at reference points or work surfaces.

5. A light control method for automatically rendering a lighting scene with lighting system, comprising:

monitoring the rendered lighting scene for the occurrence of an interference, comprising;

scanning the rendered lighting scene; and

detecting a significant deviation of the scanned lighting scene with respect to a reference lighting scene; and

automatically reconfiguring the lighting system such that a monitored occurrence of an interference is compensated, comprising;

triggering a process of characterisation of an interference from the detected significant deviation, and

performing a computation of configuration settings for the lighting system to counteract the characterized interference depending on the characterization including photometric characteristic plots or mathematical models derived therefrom, which characterize the behavior of the hardware of the lighting system to be controlled.