OLED Aging Compensation via Time-Based Gray-Scale Adjustment
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Solution Overview
Problem
Large-sized OLED display panels face significant aging issues, particularly in harsh environments like high temperatures and strong ambient light, which shorten their service life and fail to meet the extended lifespan requirements.
Innovation Solution
A compensation apparatus comprising a processor, memory, and timers that adjusts gray-scale data compensation based on pre-defined time node values and compensation parameter sets, gradually decreasing parameters in the pre-term phase, maintaining constant parameters in the mid-term phase, and gradually increasing parameters in the post-term phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OLED display panels are used in harsh environments with high temperatures and strong ambient light, then display functionality is maintained, but aging accelerates and service life is shortened
Solution Approach 1:
The patent applies preliminary action by performing gray-scale compensation before the aging effect becomes significant. The compensation apparatus proactively adjusts gray-scale data based on elapsed time and predefined compensation parameter sets, preventing display uniformity degradation before it occurs. This is evident in the use of time-based compensation parameters that are updated in advance to counteract expected aging effects.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting compensation parameters based on the operational stage and elapsed time. The system transitions between different compensation parameter sets (first, second, and third sets) corresponding to different time periods, allowing the compensation strategy to adapt to changing aging characteristics at different stages of the display panel's lifecycle.
2Reliability
If compensation parameters are adjusted to maintain gray-scale display uniformity, then aging is slowed down, but display uniformity may be affected if not properly controlled
Solution Approach 1:
The patent applies dynamics by making the compensation parameters time-dependent and adaptable. The system dynamically switches between different compensation parameter sets based on the current operational stage, allowing optimal compensation at each phase while maintaining gray-scale uniformity. The compensation strength is adjusted dynamically rather than using a fixed approach.
Solution Approach 2:
The patent implements parameter changes by using multiple distinct compensation parameter sets corresponding to different time periods. Each parameter set is optimized for its specific time range, ensuring that gray-scale uniformity is maintained without over-compensation or under-compensation at any stage of the display panel's lifecycle.
3Device complexity
If a simple display control system is used, then device complexity is low, but it cannot provide time-based gray-scale compensation for aging
Solution Approach 1:
The patent applies segmentation by dividing the compensation process into distinct time-based stages, each with its own compensation parameter set. The elapsed time is segmented into different periods (first time period, second time period, third time period), and appropriate compensation parameters are selected for each segment. This modular approach manages complexity through structured organization.
Solution Approach 2:
The patent implements preliminary action by pre-defining multiple compensation parameter sets that are ready to be applied at different stages. The system prepares compensation strategies in advance for different time periods, eliminating the need for complex real-time calculations and reducing control system complexity while maintaining effective aging compensation.
Data Source
AI summary
A compensation apparatus and method, a display apparatus and a working method thereof, and a storage medium are provided, the compensation apparatus includes a first memory, a first timer and a processor; the first timer starts timing from the processor receiving the pixel data to obtain the first timing information and send the first timing information to the processor; the processor receives the pixel data and the first timing information, compensate the gray-scale data of the pixel data according to the first timing information and the compensation parameters in the pre-term compensation parameter set when the first timing information does not reach the first time node value, compensate the gray-scale data of the pixel data according to the first timing information and the compensation parameters in the mid-term compensation parameter set.