Illumination and display control strategies, to mitigate interference of illumination light output with displayed image light output

Patent metadata

Field	Value
Publication number	US-10490118-B2
Application number	US-201715611349-A
Country	US
Kind code	B2
Filing date	Jun 1, 2017
Priority date	Jun 1, 2017
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

For a luminaire offering both illumination and display functionality, control strategies coordinate illumination/image output so as to mitigate interference of the illumination light output with aspects of the displayed image light output. In one example, when displaying a selected image with one or more white regions in the image, a sufficient number of selected white illumination emitters can be ON or operating in a low power state in the white regions while the rest of the luminaire output area can display the non-white elements of the image with aligned illumination emitters turned OFF. In another example, an image is displayed in a selected region of the luminaire output while illumination emitters within the area displaying the image are OFF or operating in a low power state, but illumination emitters along other parts of the luminaire output are turned ON.

First claim

What is claimed is:

1. A method, comprising steps of:
operating a first light emission matrix of a display to emit output light of an image from a luminaire that comprises the display and a general illumination light source including a second light emission matrix co-located in the luminaire with the first light emission matrix of the display,
the general illumination light source and the display being configured such that, at an output of the luminaire, an available output region of the second light emission matrix at least substantially overlaps with an available output region of the first light emission matrix;
based on a characteristic of the image, selecting an area of the luminaire output where general illumination light output from the second light emission matrix will not unduly interfere with the output light of the image by the first light emission matrix; and
while the first light emission matrix is emitting the output light of the image:
(a) operating a portion of the second light emission matrix, corresponding to the selected area of the luminaire output, to emit general illumination light via the selected area of the luminaire output, and
(b) concurrently maintaining all unselected portions of the second light emission matrix in a neutral state,

wherein one of the first and second emission matrices is at least substantially transmissive with respect to light output of the other of the first and second light emission matrices.

2. A method, comprising steps of:
operating a first light emission matrix of a display to emit output light of an image from a luminaire that comprises the display and a general illumination light source including a second light emission matrix co-located in the luminaire with the first light emission matrix of the display,
the general illumination light source and the display being configured such that, at an output of the luminaire, an available output region of the second light emission matrix at least substantially overlaps with an available output region of the first light emission matrix;
based on a characteristic of the image, selecting an area of the luminaire output where general illumination light output from the second light emission matrix will not unduly interfere with the output light of the image by the first light emission matrix; and
while the first light emission matrix is emitting the output light of the image:
(a) operating a portion of the second light emission matrix, corresponding to the selected area of the luminaire output, to emit general illumination light via the selected area of the luminaire output, and
(b) concurrently maintaining all unselected portions of the second light emission matrix in a neutral state,

wherein:
the selected area of the luminaire output corresponds to an area where the output light of the image emitted by the first light emission matrix will be a white portion of the image;
the selected area of the luminaire output is inside the area where the output light of the image emitted by the first light emission matrix will be the white portion of the image; and
the unselected portions of the second light emission matrix correspond to one or more areas of the luminaire output where the output light of the image emitted by the first light emission matrix will be non-white in color.

3. A method, comprising:
operating a first light emission matrix of a display to emit output light of an image from a luminaire that comprises the display and a general illumination light source including a second light emission matrix co-located in the luminaire with the first light emission matrix of the display,
the general illumination light source and the display being configured such that, at an output of the luminaire, an available output region of the second light emission matrix at least substantially overlaps with an available output region of the first light emission matrix;
based on a characteristic of the image, selecting an area of the luminaire output where general illumination light output from the second light emission matrix will not unduly interfere with the output light of the image by the first light emission matrix;
selecting a portion but not all of the luminaire output for output of the image; and
while the first light emission matrix is emitting the output light of the image:
(a) operating a portion of the second light emission matrix, corresponding to the selected area of the luminaire output, to emit general illumination light via the selected area of the luminaire output, and
(b) concurrently maintaining all unselected portions of the second light emission matrix in a neutral state,

wherein:
the step of operating the first light emission matrix limits emission of the output light of the image to the portion of the luminaire output selected for output of the image;
the area of the luminaire output selected for emission of general illumination light is outside the portion of the luminaire output selected for output of the image; and
the unselected portions of the second light emission matrix correspond to the portion of the luminaire output selected for output of the image.

4. The method of claim 1 , further comprising:
determining an operating parameter intended for the general illumination light output from the luminaire, wherein:
the second light emission matrix comprises a plurality of emitters of general illumination light; and
the step of operating the portion of the second light emission matrix comprises a step of operating general illumination light emitters in the portion of the second light emission matrix in a manner sufficient for the general illumination light output emitted from the luminaire to satisfy the determined operating parameter.

5. The method of claim 4 , wherein:
the determined operating parameter is an intensity intended for the general illumination light output from the luminaire; and
the step of operating general illumination light emitters operates a number but not all of the general illumination light emitters in the portion of the second light emission matrix, the operated number of the general illumination light emitters being sufficient to achieve the intended intensity.

6. The method of claim 4 , wherein:
the determined operating parameter is an intensity intended for the general illumination light output from the luminaire; and
the step of operating general illumination light emitters comprises driving the general illumination light emitters in the portion of the second light emission matrix at a power level sufficient to achieve the intended intensity.

7. The method of claim 1 , wherein the first light emission matrix of the display is at least substantially transmissive with respect to light output of the second light emission matrix of the general illumination light source.

8. The method of claim 1 , wherein the second light emission matrix of the general illumination light source is at least substantially transmissive with respect to light output of the first light emission matrix of the display.

9. The method of claim 1 wherein:
the first light emission matrix of the display comprises a matrix of display pixel emitters, each display pixel emitter being controllable to emit selected amounts of three or more different colors;
the second light emission matrix of the general illumination light source comprises a matrix of white light emitters; and
each white light emitter of the second light emission matrix is co-located of the with a display pixel emitter of the first light emission matrix.

10. A lighting device, comprising:
a display comprising a first light emission matrix configured to output light from selected areas of the first emission matr

Assignees

• Abl Ip Holding Llc

Inventors

• Komanduri Ravi Kumar
• Lin Guan-Bo
• Mao An
• Ramer David P
• Raj Rashmi Kumar

Classifications

• G09G3/32 Primary

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G2300/023

  Display panel composed of stacked panels · CPC title

• H05B33/0842

  Electricity · mapped topic

• H05B45/30

  Driver circuits · CPC title