OLED Subpixel Deterioration Compensation for Color Temperature Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light emitting display devices face image quality deterioration due to variations in color temperature of white light emitted by sub-pixels, caused by differences in temperature-induced deterioration between first and second organic light emitting layers.
Innovation Solution
An organic light emitting display device with a deterioration compensation unit that generates deterioration estimation data and temperature deterioration data to calculate individual compensation gains for each sub-pixel, correcting input data to maintain constant color temperature of white light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If organic light emitting layers are used to emit white light with different colors, then color image display is achieved, but differences in temperature-induced deterioration between layers cause color temperature variation and image quality deterioration
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the drive current parameters for each organic light emitting layer based on accumulated stress data and temperature conditions. The compensation unit modifies operating parameters (current magnitude and duration) to counteract differential deterioration, thereby maintaining consistent color temperature while preserving color display capability
Solution Approach 2:
The patent implements feedback through a compensation unit that continuously monitors accumulated stress data, temperature conditions, and color temperature variations. This feedback loop enables real-time adjustment of drive currents to compensate for deterioration differences between layers, maintaining reliable color temperature consistency throughout device operation
2Productivity
If display operation continues over extended periods, then productivity is improved, but usage-dependent deterioration of organic light emitting layers causes luminance variation and reliability degradation
Solution Approach 1:
The patent applies preliminary action by accumulating stress data during normal operation and calculating compensation values before significant luminance deterioration occurs. The compensation unit proactively adjusts drive currents based on accumulated usage data, preventing luminance variation before it affects display quality, thereby enabling extended operation with maintained reliability
Solution Approach 2:
The patent uses feedback through continuous monitoring of accumulated stress data and luminance characteristics. The compensation unit processes this feedback to dynamically adjust drive currents, counteracting usage-dependent deterioration in real-time and maintaining luminance uniformity throughout extended operation periods
3Adaptability or versatility
If ambient temperature varies, then adaptability to different environments is improved, but temperature-induced deterioration differences between organic light emitting layers cause color temperature change
Solution Approach 1:
The patent applies parameter changes by adjusting drive current parameters based on detected ambient temperature conditions and accumulated stress data. The compensation unit modifies operating parameters to counteract temperature-induced deterioration differences between layers, maintaining stable color temperature across varying ambient temperatures while preserving environmental adaptability
Solution Approach 2:
The patent implements feedback through temperature monitoring and color temperature detection. The compensation unit uses this feedback to dynamically adjust drive currents in response to ambient temperature variations, compensating for differential deterioration and maintaining color temperature stability across different environmental conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents usage-dependent deterioration in image quality and reliability by compensating for differences in deterioration between organic light emitting layers, maintaining consistent color temperature across ambient temperature changes.
Implementation Method 1
an organic light emitting diode emitting white light and color filters corresponding to different colors
Data Source
AI summary
An organic light emitting display device includes a display panel and a deterioration compensation unit. The display panel comprises a plurality of unit pixels each comprising at least three sub-pixels corresponding to different colors and an organic light emitting diode. The deterioration compensation unit generates deterioration estimation data of each of the sub-pixels based on cumulative data of each of the sub-pixels, generates first and second temperature deterioration data based on display temperature data corresponding to temperature of the organic light emitting display device, calculates an individual compensation gain corresponding to each of the sub-pixels based on the deterioration estimation data and the first and second temperature deterioration data, and corrects input data of each of the sub-pixels based on the individual compensation gain of each of the sub-pixels.