Selecting adjustment for OLED drive voltage

• US 20060044227A1
• Filed: 06/18/2004
• Published: 03/02/2006
• Est. Priority Date: 06/18/2004
• Status: Abandoned Application

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Hadcock, David Harold
• Application Number:
  US10/871,192
• Publication Number:
  US 20060044227A1
• Time in Patent Office: Days
• US Class Current: 345/76
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 2320/029 by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/3225 using an active matrix

Abstract

A method for selecting an adjustment for at least one drive voltage used to drive an OLED display to reduce power consumption including operating the display to produce a calibration curve which depicts the drive voltage versus current or luminance, and selecting the adjustment for the drive voltage based upon the calibration curve so as to reduce the power consumed by the OLED display while maintaining desired luminance throughout the lifetime of the OLED display.

Claims

1. A method for selecting an adjustment for at least one drive voltage used to drive an OLED display to reduce power consumption, comprising:

a) operating the display to produce a calibration curve which depicts the drive voltage versus current or luminance; and

b) selecting the adjustment for the drive voltage based upon the calibration curve so as to reduce the power consumed by the OLED display while maintaining desired luminance throughout the lifetime of the OLED display.

2. The method according to claim 1 wherein the selected adjustment for the drive voltage includes headroom sufficient to permit compensation for aging.

3. The method according to claim 2 wherein the selected adjustment for the drive voltage is based upon the usage of the OLED display.

4. A method for selecting an adjustment for a drive voltage used to drive at least three different color channels in an OLED display to reduce power consumption, comprising:

a) operating the display to produce a calibration curve for each color channel which depicts the drive voltage versus current or luminance; and

b) selecting the adjustment for the drive voltage based upon the calibration curve which produces the least desirable drive voltage so as to reduce the power consumed by the OLED display while maintaining desired luminance throughout the lifetime of the OLED display.

5. The method according to claim 4 wherein the selected adjustment for the drive voltage includes headroom sufficient to permit compensation for aging.

6. The method according to claim 5 wherein the selected adjustment for the drive voltage is based upon the usage of the OLED display.

7. A method for selecting adjustments for drive voltages used to respectively drive at least three different color channels in an OLED display to reduce power consumption, comprising:

a) operating the display to produce a calibration curve for each color channel which depicts the drive voltage versus current or luminance; and

b) selecting the adjustment for the drive voltage for each color channel based upon the calibration curves so as to reduce the power consumed by the OLED display while maintaining desired luminance throughout the lifetime of the OLED display.

8. The method according to claim 7 wherein the selected adjustments for the drive voltages include headroom sufficient to permit compensation for aging.

9. The method according to claim 8 wherein the selected adjustments for the drive voltages are based upon the usage of the OLED display.

10. A method for selecting an adjustment for at least one drive voltage used to drive an OLED display to reduce power consumption, comprising:

a) operating the display to produce a calibration curve which depicts the drive voltage versus current or luminance;

b) selecting the adjustment for the drive voltage based upon the calibration curve so as to reduce the power consumed by the OLED display while maintaining desired luminance; and

c) repeating steps (a) and (b) after a period of time to adjust for changes in the OLED display.

11. The method according to claim 10 wherein the selected adjustment for the drive voltage includes headroom sufficient to permit compensation for aging.

12. The method according to claim 11 wherein the selected adjustment for the drive voltage is based upon the usage of the OLED display.