Method, system and apparatus for dynamically monitoring and calibrating display tiles

Patent metadata

Field	Value
Publication number	US-9307616-B2
Application number	US-201514713034-A
Country	US
Kind code	B2
Filing date	May 15, 2015
Priority date	Dec 24, 2013
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A method, system and apparatus for dynamically monitoring and calibrating display tiles are provided. The apparatus comprises: an array of light emitting devices; one or more light emitting devices paired with light emitting devices of the array; one or more sensors configured to detect an optical characteristic and/or an electrical characteristic of the one or more paired light emitting devices; and, circuitry configured to: drive the array; drive each of the one or more further light emitting devices under same conditions as light emitting devices of the array; temporarily drive each of the one or more paired light emitting devices under different conditions from the array; and, adjust driving of the array based on the optical characteristic and/or electrical characteristic of the one or more paired light emitting devices detected at sensor(s) when the one or more paired light emitting devices are driven under the different conditions.

First claim

What is claimed is:

1. A device comprising:
a first light emitting device;
a second light emitting device paired with the first light emitting device, the first light emitting device and the second light emitting device each having one or more of a same initial color and a same initial brightness;
at least one sensor configured to detect one or more of an optical characteristic and an electrical characteristic of the second light emitting device; and,
circuitry configured to:
drive the second light emitting device under same conditions as the first light emitting device;
temporarily drive the second light emitting device under different conditions while continuing to drive the first light emitting device the same conditions so as to not interrupt operation of the first light emitting device;
determine one or more of the optical characteristic and the electrical characteristic of the second light emitting device at the at least one sensor when the second light emitting device is temporarily driven under the different conditions;
and,
adjust driving of the first light emitting device for aging of the first light emitting device as indicated by one or more of the optical characteristic and the electrical characteristic of the second light emitting device determined when the second light emitting device is temporarily driven under the different conditions.

2. The device of claim 1 , further comprising a light guide configured to guide light from the second light emitting device to the at least one sensor.

3. The device of claim 1 , wherein the first light emitting device is part of an array of light emitting devices.

4. The device of claim 1 , further comprising a chassis, and the first light emitting device and the second light emitting device are located on opposite sides of the chassis.

5. The device of claim 1 , wherein the circuitry is further configured to drive the second light emitting device in a test pattern when temporarily driving the second light emitting device under the different conditions from the first light emitting device.

6. The device of claim 1 , wherein the optical characteristic comprises one or more of a color coordinate, a white point, and an intensity of the second light emitting device.

7. The device of claim 1 , wherein the electrical characteristic comprises one or more of an operating power, an operating voltage and an operating current of the second light emitting device.

8. The device of claim 1 , further comprising at least one or more temperature sensors configured to measure a temperature difference between the first light emitting device and the second light emitting device, wherein adjusting driving of the first light emitting device is further based on the temperature difference.

9. A method of use of a device comprising: a first light emitting device; a second light emitting device paired with the first light emitting device, the first light emitting device and the second light emitting device each having one or more of a same initial color and a same initial brightness; at least one sensor configured to detect one or more of an optical characteristic and an electrical characteristic of the second light emitting device; and circuitry, the method comprising:
driving, using the circuitry, the second light emitting device under same conditions as the first light emitting device;
temporarily driving, using the circuitry, the second light emitting device under different conditions while continuing to drive the first light emitting device the same conditions so as to not interrupt operation of the first light emitting device
determining, using the at least one sensor, one or more of the optical characteristic and the electrical characteristic of the second light emitting device when the second light emitting device is temporarily driven under the different conditions; and,
adjusting, using the circuitry, driving of the first light emitting device for aging of the first light emitting device as indicated by one or more of the optical characteristic and the electrical characteristic of the second light emitting device determined when the second light emitting device is temporarily driven under the different conditions.

10. The method of claim 9 , further comprising further adjusting driving the first light emitting device based on a temperature difference between the first light emitting device and the second light emitting device.

11. A system comprising:
light emitting tiles, each comprising: a first light emitting device; a second light emitting device; at least one sensor configured to detect one or more of an optical characteristic and an electrical characteristic of the second light emitting device; and, circuitry configured to: drive the second light emitting device under same conditions as the first light emitting device; temporarily drive the second light emitting device under different conditions while continuing to drive the first light emitting device the same conditions so as to not interrupt operation of the first light emitting device; determine one or more of the optical characteristic and the electrical characteristic of the second light emitting device at the at least one sensor when the second light emitting device is temporarily driven under the different conditions; and, adjust driving of the first light emitting device for aging of the first light emitting device as indicated by one or more of the optical characteristic and the electrical characteristic of the second light emitting device determined when the second light emitting device is temporarily driven under the different conditions; and
at least one computing device in communication with the light emitting tiles, the at least one computing device configured to:
receive, from respective sensors of each of the light emitting tiles, one or more of a respective optical characteristic and a respective electrical characteristic of a respective second light emitting device when respectively driven under respective different conditions;
determine one or more of a common optical characteristic and a common electrical characteristic from one or more of the respective optical characteristic and the respective electrical characteristic; and,
communicate one or more of the common optical characteristic and the common electrical characteristic to one or more of the light emitting tiles so that respective circuitry can drive each respective first light emitting device according to one or more of the common optical characteristic and the common electrical characteristic.

12. The system of claim 11 , where the common characteristic comprises one or more of a common white point, at least one common colour coordinate, a common intensity, a common operating power, a common operating voltage and a common operating current.

Assignees

• Christie Digital Systems Usa

Inventors

• Robinson James
• Lemieux Marc

Classifications

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G2320/029

  by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel · CPC title

• G09G2320/0233

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

• G09G2330/02

  Details of power systems and of start or stop of display operation · CPC title

• H05B45/22

  using optical feedback · CPC title