OLED Display System Compensating for Changes Therein

• US 20100194670A1
• Filed: 04/13/2010
• Published: 08/05/2010
• Est. Priority Date: 06/16/2006
• Status: Abandoned Application

• Current Assignee: Ronald S. Cok
• Original Assignee: Ronald S. Cok
• Inventors: COK, Ronald S.
• Application Number:
  US12/759,382
• Publication Number:
  US 20100194670A1
• 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 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 2320/08 Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
• CPC Class Codes: G09G 3/3225 using an active matrix

Abstract

A method of compensating an OLED display device having light-emitting elements that change with use, comprising the steps of: a) using the device to display images; b) sequentially displaying an ordered series of calibration images, wherein each of the calibration images have one or more corresponding flat fields, at least one of the corresponding flat fields of each calibration image of the ordered series has a different luminance value, and the calibration images are arranged in the ordered series so as to reduce perceived luminance discontinuities; c) measuring and recording current used by the display for each sequentially displayed calibration image; d) calculating compensation parameters based on the measured currents; e) compensating an input image using the compensation parameters; and f) displaying the compensated input image.

Claims

1. An OLED display system, comprising:

a) an OLED device comprising a plurality of light-emitting elements that change with use;

b) a controller for sequentially displaying an ordered series of calibration images, wherein each of the calibration images have one or more corresponding flat fields, at least one of the corresponding flat fields of each calibration image of the ordered series has a different luminance value, and the calibration images are arranged in the ordered series so as to reduce perceived luminance discontinuities;

for measuring and recording current used by the display for each sequentially displayed calibration image;

for calculating compensation parameters based on the measured currents;

for compensating an input image using the compensation parameters; and

for displaying the compensated input image.