System and methods for extracting correlation curves for an organic light emitting device
First Claim
1. A method for compensating of aging effects in a display system comprising a plurality of organic light emitting diode (OLED) based pixels configured to display images, the method comprising:
- storing, in a computer-readable non-transitory memory device, a characterization correlation curve for a stress condition said characterization correlation curve obtained using a reference device;
determining a stress condition on a pixel of the OLED based pixels resulting from operation of the display system;
determining a compensation factor based on the determined stress condition and the characterization correlation curve of the stress condition; and
adjusting a programming of the pixel based on the compensation factor.
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Abstract
A system and method for determining and applying characterization correlation curves for aging effects on an organic light organic light emitting device (OLED) based pixel is disclosed. A first stress condition is applied to a reference pixel having a drive transistor and an OLED. An output voltage based on a reference current is measured periodically to determine an electrical characteristic of the reference pixel under the first predetermined stress condition. The luminance of the reference pixel is measured periodically to determine an optical characteristic of the reference pixel. A characterization correlation curve corresponding to the first stress condition including the determined electrical and optical characteristic of the reference pixel is stored. Characterization correlation curves for other predetermined stress conditions are also stored based on application of the predetermined stress conditions on other reference pixels. The stress condition of an active pixel is determined and a compensation voltage is determined by correlating the stress condition of the active pixel with the curves of the predetermined stress conditions.
610 Citations
17 Claims
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1. A method for compensating of aging effects in a display system comprising a plurality of organic light emitting diode (OLED) based pixels configured to display images, the method comprising:
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storing, in a computer-readable non-transitory memory device, a characterization correlation curve for a stress condition said characterization correlation curve obtained using a reference device; determining a stress condition on a pixel of the OLED based pixels resulting from operation of the display system; determining a compensation factor based on the determined stress condition and the characterization correlation curve of the stress condition; and adjusting a programming of the pixel based on the compensation factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A display system configured for compensating of aging effects, comprising:
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a plurality of pixels configured to display images, each said pixel comprising an organic light emitting diode (OLED); a memory configured to store a characterization correlation curve for a pixel stress condition; and a controller coupled to the plurality of pixels, the controller configured to determine a stress condition on a pixel of the plurality of pixels, and to determine a compensation factor for a programming based on the characterization correlation curve. - View Dependent Claims (13, 14, 15, 16)
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17. A method for compensating of aging effects in a display system comprising a plurality of organic light emitting diode (OLED) based pixels configured to display images, the method comprising:
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performing measurements on a reference device under a reference stress condition to obtain a characterization correlation curve, wherein the reference device is not part of the plurality of OLED based pixels configured to display images; determining a stress condition on a pixel of the OLED pixels resulting from displaying images during operation of the display system, determining a compensation factor to apply to a programming of the pixel based on the characterization correlation curve, and adjusting the programming of the pixel based on the compensation factor.
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Specification