On demand calibration of imaging displays

Patent metadata

Field	Value
Publication number	US-9542910-B2
Application number	US-201213618089-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Sep 30, 2003
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A self-calibrating imaging display system includes a display comprising a screen and at least one photosensor associated with the screen and generating an output signal correlating to measurements for at least one region of the screen. The system further includes a display adaptor configured for, during a calibration routine, generating a display test pattern in the at least one region of the screen comprising at least one measurement field that comprises a number of pixels less than a total number of pixels of the screen and causing the at least one measurement field to be stepped through a sequence of increasing display driving level values. The system also includes a calibration module configured for, during the calibration routine, receiving the output signal, comparing the output signal to reference data, and generating at least one correction factor based on the comparing.

First claim

What is claimed is:

1. A self-calibrating imaging display system comprising:
a display comprising a screen;
a display adaptor configured for, during a calibration routine, generating a display test pattern in two or more regions of the screen, the display test pattern in each region of the two or more regions comprising at least one measurement field that comprises a number of pixels less than a total number of pixels of the screen, and for each region of the two or more regions stepping the at least one measurement field in that region through a sequence of all display driving level (DDL) values;
two or more photosensors associated with the display and generating a plurality of output signals correlating to measurements for the two or more regions of the screen for the sequence of all DDL values, wherein the measurements comprise measurements of luminance values for the two or more regions of the screen and measurements of color values for the two or more regions of the screen, wherein there is at least one photosensor of the two or more photosensors disposed in each region of the two or more regions of the screen, and wherein the two or more photosensors are photoelectric cells with electrical characteristics that vary in accordance with an amount of light that is incident upon the photoelectric cells; and
a calibrator communicatively linked to the display, the two or more photosensors, and the display adaptor, the calibrator configured for, during the calibration routine, receiving the plurality of output signals, comparing the plurality of output signals to reference data, and generating a correction factor for each region of the two or more regions based on the comparing.

2. The self-calibrating imaging display system of claim 1 , wherein the number of pixels for the at least one measurement field is 10% of the total number of pixels of the screen.

3. The self-calibrating imaging display system of claim 1 , wherein the calibrator is further configured for updating a calibration record upon the generating of a correction factor for each region of the two or more regions.

4. The self-calibrating imaging display system of claim 1 , wherein the display is a medical imaging display.

5. The self-calibrating imaging display system of claim 1 , further comprising a display driver associated with the display adapter, and wherein calibrator adjusts the display adaptor by updating the display driver based on the correction factors generated for the two or more regions.

6. The self-calibrating imaging display system of claim 1 , wherein the stepping the at least one measurement field in that region through the sequence of all DDL values comprises stepping through a sequence of different values, starting with zero and increasing at each step until a maximum DDL values is reached.

7. A method of performing a calibration routine for an imaging display system, the method comprising:
generating a display test pattern in two or more regions of a screen of a display using a display adapter, the display test pattern in each region of the two or more regions comprising at least one measurement field that comprises a number of pixels less than a total number of pixels of the screen; and
for each region of the two or more regions:
stepping the at least one measurement field in that region through a sequence of all display driving level (DDL) values;
generating a plurality of output signals using at least one photosensor of two or more photosensors associated with the display, wherein there is at least one photosensor of the two or more photosensors disposed in each region of the two or more regions of the screen, the plurality of output signals correlating to measurements of the at least one photosensor for that region of the screen for the sequence of all DDL values, wherein the measurements comprise measurements of luminance values for that region of the screen and measurements of color values for that region of the screen, and wherein the two or more photosensors are photoelectric cells with electrical characteristics that vary in accordance with an amount of light that is incident upon the photoelectric cells;
comparing the plurality of output signals to reference data; and
generating a correction factor for that region based on the comparing.

8. The method of claim 7 , wherein the number of pixels for the at least one measurement field is 10% of the total number of pixels of the screen.

9. The method of claim 7 , further comprising updating a calibration record after the generating of the correction factor for that region.

10. The method of claim 7 , further comprising updating a display driver associated with the display adapter based on the correction factors generated for the two or more regions.

11. The method of claim 7 , wherein the stepping the at least one measurement field in that region through the sequence of all DDL values comprises stepping through a sequence of different values, starting with zero and increasing at each step until a maximum DDL value is reached.

12. A non-transitory computer-readable medium having stored thereon a plurality of instructions for performing a method comprising:
generating a display test pattern in two or more regions of a screen of a display using a display adapter, the display test pattern in each region of the two or more regions comprising at least one measurement field that comprises a number of pixels less than a total number of pixels of the screen; and
for each region of the two or more regions:
stepping the at least one measurement field in that region through a sequence of all display driving level (DDL) values;
generating a plurality of output signals using at least one photosensor of two or more photosensors associated with the display, wherein there is at least one photosensor of the two or more photosensors disposed in each region of the two or more regions of the screen, the plurality of output signals correlating to measurements of the at least one photosensor for that region of the screen for the sequence of all DDL values, wherein the measurements comprise measurements of luminance values for that region of the screen and measurements of color values for that region of the screen, and wherein the two or more photosensors are photoelectric cells with electrical characteristics that vary in accordance with an amount of light that is incident upon the photoelectric cells;
comparing the plurality of output signals to reference data; and
generating a correction factor for that region based on the comparing.

13. The non-transitory computer readable medium of claim 12 , wherein the number of pixels for the at least one measurement field is 10% of the total number of pixels of the screen.

14. The non-transitory computer readable medium of claim 12 , further comprising updating a calibration record upon the generating of the correction factor for that region.

15. The non-transitory computer readable medium of claim 12 , further comprising updating a display driver associated with the display adapter based on the correction factors generated for the two or more regions.

16. The non-transitory computer readable medium of claim 12 , wherein the stepping the at least one measurement field in that region through the sequence of all DDL values comprising stepping through a sequence of different values, starting with zero and increasing at each step until a maximum DDL value is reached.

Assignees

• Coley Sussan S
• Moore Victor S
• Szabo Robert M
• IBM

Inventors

• Coley Sussan S
• Moore Victor S
• Szabo Robert M

Classifications

• G09G2320/0285

  using tables for spatial correction of display data · CPC title

• G09G2320/0693

  Calibration of display systems · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G5/10 Primary

  Intensity circuits · CPC title

• G09G2320/0606

  Manual adjustment · CPC title