Internal Compensation Pixel Modeling for Display Degradation Control
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Solution Overview
Problem
Existing display devices face challenges in accurately compensating for degradation due to the lack of effective modeling of operation characteristics of internal compensation pixels, particularly during light-emission and sensing periods.
Innovation Solution
The display device incorporates a degradation compensation modeling that separately applies first operation characteristics during the light-emission period for emitting a light-emitting element and second operation characteristics during the sensing period for sensing the threshold voltage of the driving transistor, using a controller to compensate for image data based on these characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single degradation compensation modeling is used for both light-emission and sensing periods, then the device complexity is reduced, but the measurement precision of degradation compensation deteriorates
Solution Approach 1:
The patent divides the degradation compensation modeling into two separate models: one for the light-emission period and another for the sensing period. This segmentation allows each model to be optimized for its specific operational characteristics, thereby improving the precision of degradation compensation for each period without requiring a single overly complex unified model.
Solution Approach 2:
The patent applies different compensation parameters and characteristics locally to each period. The light-emission period model uses parameters optimized for light emission operations, while the sensing period model uses parameters optimized for threshold voltage sensing operations. This local quality approach ensures that each model addresses the specific degradation mechanisms relevant to its period, improving overall compensation accuracy.
2Reliability
If operation characteristics are not separately modeled for different periods, then the manufacturing precision of compensation algorithms is improved, but the reliability of degradation compensation deteriorates
Solution Approach 1:
The patent segments the compensation algorithm into period-specific implementations. By creating separate degradation compensation models for light-emission and sensing periods, the system achieves higher reliability through period-appropriate compensation while maintaining manufacturing precision through standardized model development processes for each segment.
Solution Approach 2:
The patent changes the compensation parameters based on the operational period. Different parameters are used for light-emission period compensation versus sensing period compensation, allowing the system to adapt to the specific electrical and physical conditions of each period, thereby improving reliability without sacrificing algorithmic precision.
Data Source
AI summary
A display device is provided, in which operation characteristics of an internal compensation pixel are applied to a degradation compensation modeling to achieve accurate degradation compensation. The display device can include a display panel including an internal compensation pixel, a data driver configured to apply a data voltage to the display panel, and a controller configured to compensate for image data based on a degradation compensation modeling. The degradation compensation modeling includes a degradation compensation modeling representing operation characteristics of the internal compensation pixel during a light-emission period, and a degradation compensation modeling representing operation characteristics of the internal compensation pixel during a sensing period. The compensated image data is provided to the data driver.