Enhancements of a transparent display to form a software configurable luminaire

Patent metadata

Field	Value
Publication number	US-10176765-B2
Application number	US-201615198712-A
Country	US
Kind code	B2
Filing date	Jun 30, 2016
Priority date	Jun 30, 2016
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

The examples relate to various implementations of a software configurable lighting device, having an enhance display device that is able to generate light sufficient to provide general illumination of a space in which the lighting device is installed and provide an image display. The general illumination is provided by additional light sources and/or improved display components of the enhanced display device.

First claim

What is claimed is:

1. A lighting device, comprising:
an image display device comprising one or more first light emitters configured to generate and emit light to display an image;
a general illumination device collocated with the image display device, wherein the general illumination device comprises one or more second light emitters configured to generate and emit light for general illumination,
a driver system coupled to the one or more first light emitters of the image, display device and coupled to the one or more second light emitters of the general illumination device,
the driver system being configured to control the light generated by the general illumination device; and
the driver system configured to control the light generated by the image display device;
a memory;
a processor having access to the memory and coupled to the driver system to control operation of the driver system; and
programming in the memory, wherein execution of the programming by the processor configures the lighting device to perform functions including functions to:
obtain an image selection and a general lighting generation selection as software control data;
transform the image selection based on a desired color characteristic distribution, wherein the function to transform the image selection comprises functions to:
calculate a total red content, a total green content and a total blue content of the image selection, wherein:
the total red content equals a summation of red pixel intensity values within the image selection;
the total green content equals a summation of green pixel intensity values within the image selection; and
the total blue content equals a summation of blue pixel values intensity within the image selection;

select an image transformation function based on a number of illumination requirements, the selected image transformation function includes unknown variables;
solve, based on the number of illumination requirements, the unknown variables of the selected image transformation function; and
transform the image selection based on the solved image transformation function to venerate the transformed image selection;

modify the general lighting generation selection based on the transformed image selection;
present an image output, based on the transformed image selected, via the image display device; and
control operation of the general illumination device via the driver system to emit light for general illumination from the general illumination device according to the modified general lighting generation selection.

2. The lighting device of claim 1 , wherein:
the general illumination device comprises an array of light emitting diodes (LEDs);
the image display device comprises:
a first set of LED strips oriented in a first direction, each LED strip of the first set including a first number of LEDs evenly spaced along the respective LED strip; and
a second set of LED strips oriented in a second direction perpendicular to the first direction, each LED strip of the second set including a second number of LEDs evenly spaced along the respective LED strip, wherein:
the LED strips of the first set are spaced evenly apart from each other in parallel;
the LED strips of the second set are spaced evenly apart from each other in parallel; and
the first set of LED strips and the second set of LED strips form a grid; and
the general illumination device is located behind the image display device such that illumination generated by any one LED of the array of LEDs passes between a third number of LEDs of the grid of evenly spaced LEDs and is partially blocked by the third number of LEDs of the grid of evenly spaced LEDs, the third number including an equal number of LEDs of the first set of LED strips and LEDs of the second set of LED strips.

3. The lighting device of claim 1 , further comprising:
collimating optics; and
a spatial light modulator,
wherein the collimating optics and the spatial light modulator are placed between the general illumination device and the image display device.

4. The lighting device of claim 3 , wherein:
the collimating optics comprise total internal reflection lenses optically coupling, illumination light generated by the general illumination device to cells of the spatial light modulator; and
each cell of the spatial light modulator couples light to one or more transparent regions of the image display device.

5. The lighting device of claim 3 , wherein the spatial light modulator is electro-wetting cell array.

6. The lighting device of claim 3 , further comprising a partial diffuser located on an output side of the image display device.

7. The lighting device of claim 3 , wherein:
the driver system is further coupled to the spatial light modulator; and
execution of the programming by the processor further configures the lighting device to perform a further function to control the spatial light modulator to control distribution of illumination generated by the general illumination device, generated illumination distribution being performed by at least one of shaping or steering of the generated illumination by the spatial light modulator.

8. The lighting device of claim 1 , wherein:
one requirement is a target coordinated color temperature (CCT) of the image output presented by the image display device; and
presentation of the transformed image selection as the image output presented by the image display device produces a CCT matching the target CCT.

9. The lighting device of claim 1 , wherein the function to transform the image selection further comprises a function to apply a second image transformation function, the second image transformation function performing a scaling of individual pixel intensity values.

10. The lighting device of claim 1 , wherein the function to transform the image selection further comprises a function to calculate a figure of merit of the transformed image selection, the figure of merit measuring a difference between the image selection and the transformed image selection.

11. A method, comprising:
obtaining an image selection and a general lighting generation selection;
transforming the image selection based on a desired color characteristic distribution, wherein the transforming step comprises:
calculating a total red content, a total green content and a total blue content of the image selection, wherein;
the total red content equals a summation of red pixel intensity values within the image selection;
the total green content equals a summation of green pixel intensity values within the image selection; and
the total blue content equals a summation of blue pixel intensity values within the image selection;

selecting an image transformation function based on a number of display requirements, the selected image transformation function includes unknown variables;
solving, based on the number of display requirements, the unknown variables of the selected image transformation function; and
transforming the image selection based on the solve image transformation function to generate the transformed image selection;

modifying the general lighting generation selection based on the transformed image selection;
presenting, via a transparent image display device comprising one or more first light emitters configured to generate and emit light to display an image, an image output based on the transformed image selection; and
controlling operation of a general illumination device comprising one or: ore second light emitters located behind the transparent image display device to emit light for general illumination from the general illumination device according to the modified general lighting

Assignees

• Abl Ip Holding Llc

Inventors

• Komanduri Ravi
• Raj Rashmi Kumar
• Mao An
• Lin Guan-Bo
• MAHER Hampton Boone
• Goodman Jonathan Lloyd
• Ramer David P

Classifications

• G09G3/3426

  the different display panel areas being distributed in two dimensions, e.g. matrix · CPC title

• H05B47/11

  by determining the brightness or colour temperature of ambient light · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• F21S8/04

  intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03}) · CPC title