Method of controlling the lighting of a room in accordance with an image projected onto a projection surface

• US 8,690,362 B2
• Filed: 03/10/2008
• Issued: 04/08/2014
• Est. Priority Date: 03/13/2007
• Status: Expired due to Fees

• Current Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Wendt, Matthias
• Primary Examiner(s): Legasse, Jr., Francis M
• Assistant Examiner(s): BROOKS, JERRY L.
• Application Number:
  US12/530,544
• Publication Number:
  US 20100110387A1
• Time in Patent Office: 2,220 Days
• Field of Search: 353/122, 353/121, 353/20, 250/205, 250/214
• US Class Current: 353/122
• CPC Class Codes: H04N 21/4131 home appliance, e.g. lighting, air conditioning system, metering devices home automation data switching networks exchanging configuration information on appliance services H04L12/2807
• CPC Class Codes: H04N 21/42202 environmental sensors, e.g. for detecting temperature, luminosity, pressure, earthquakes
• CPC Class Codes: H04N 5/58 in dependence upon ambient light
• CPC Class Codes: H04N 9/3194 including sensor feedback
• CPC Class Codes: H04N 9/73 Colour balance circuits, e.g. white balance circuits or colour temperature control camera processing pipelines for colour balance H04N23/88
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

The invention describes a method of controlling a lighting of a room (1) in accordance with a still or moving image (2) projected onto a projection surface (3s), which method comprises optically measuring a number of characteristic features (f) of the projected image and adjusting the room lighting of the room on the basis of the measured characteristic features (f). Furthermore, the invention relates to a system for controlling the lighting of a room (1) in accordance with an image (2) projected onto a projection surface (3s), to a control device (9) for use in such a system, and to a projection screen device (3) for use in such a system. Moreover, the invention relates to a room lighting system (1) for lighting of a room in accordance with an image (2) projected onto a projection surface (3s).

Claims

1. A method of controlling a lighting of a room in accordance with an image projected by a projector onto a dedicated projection screen, which method comprises:

controlling, at a control unit that is autonomous from the projector, a plurality of lighting devices in a lighting arrangement in the room;

measuring a number of characteristic features of the projected image on or behind the projection screen using a plurality of sensors coupled with the control unit to measure luminous intensity and color;

adjusting, by the control unit, the lighting devices of the room based at least in part on the measured characteristic features;

projecting in an area surrounding the projection screen with light of a color and luminous intensity matching adjacent areas at the edges of the projected image;

wherein a number of zones of a surrounding area of the projection screen are illuminated individually by one of the lighting devices on the basis of the measured features;

wherein said measurements of the characteristic features are performed in specific measuring areas at the edges of the projection screen and the zones of the surrounding area adjacent to the specific measuring areas are illuminated on the basis of the measurements at the specific areas;

wherein, in a first phase, the room lighting is off, and measurement of the characteristic features of the image is performed, and

wherein, in a second phase, the room lighting is on, and measurement of characteristic features of the room lighting is performed, and

wherein an adjustment of the room lighting is carried out on the basis of the measurements performed in both first and second phases.

2. A method of claim 1 wherein the measurement in each specific area is performed at a number of discrete measuring points in this specific area.

3. A system for controlling a lighting of a room in accordance with an image projected onto a transparent projection screen, comprising:

a plurality of optical sensors for measuring a plurality of characteristic features of the projected image generated by an image projector at a plurality of different measuring points behind the projection screen;

a control unit autonomous from the image projector and coupled with the plurality of optical sensors for generating a control signal for a lighting device having a plurality lighting emitters on the basis of the measured characteristic features;

an output interface for transmitting the control signals to the lighting device;

the control signals operable to configure said lighting device to illuminate a plurality of zones, each of said plurality of zones adjacent to a respective said different measuring points;

wherein said illumination of each said plurality of zones is based upon a dominant color measured at said respective measuring point such that the lighting device illuminates the zones in a corresponding color and luminous intensity to substantially match the measured characteristic features.

4. A method for controlling a lighting system of a room, comprising:

projecting an image onto a dedicated projection screen;

operating a lighting system control unit that is autonomous from a projector projecting the image to control a plurality of lighting devices in the lighting system of the room;

measuring a number of characteristic features by a plurality of optical sensors coupled with the lighting system control unit, the characteristic features including luminous intensity and color values of the projected image;

allowing aspects of the projected image to pass through a plurality of transparent areas of the dedicated projections screen by providing at least a partially transparent dedicated projection screen at the areas;

positioning the plurality of sensors at the plurality of transparent areas and behind the projection screen;

modifying, by the lighting system control unit, the lighting system based upon the measured characteristics such that a plurality of zones of a surrounding area of the dedicated projection screen are illuminated individually on the basis of the measured characteristic features.