OLED Life Compensation via Position Weighting and TFT Extraction
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Solution Overview
Problem
Current solutions for life compensation of OLED devices are costly and technically difficult due to the need for special detection integrated circuit (IC) design in conjunction with pixel design, which complicates the extension of OLED device life while maintaining display performance.
Innovation Solution
A compensation system and method that includes a display data input module, equivalent life calculation module, OLED device attenuation degree calculation module, display position weight ratio module, life compensation data generation module, and data compensation and display data output module, which sets and generates position compensation data using position weights A, B, and C to extend OLED device life while ensuring display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If external complementary pixel circuits (common 3T1C) are used to detect drift of OLED device characteristics, then OLED device life can be compensated, but detection integrated circuit (IC) design becomes complex and costly
Solution Approach 1:
The patent extracts the detection function from external complementary pixel circuits and relocates it to the existing TFT device within the pixel structure. By utilizing the TFT device's inherent characteristics and integrating detection functionality directly into the pixel circuit, the need for separate external detection circuits is eliminated, thereby reducing overall system complexity while maintaining OLED life compensation capability
Solution Approach 2:
The TFT device is designed to serve multiple functions: it acts as both the driving transistor for OLED operation and as the detection element for monitoring OLED characteristic drift. This multi-functional approach eliminates the need for dedicated detection circuits, reducing device complexity while enabling continuous monitoring for life compensation
2Measurement precision
If position weight ratio module with multiple weight parameters is implemented, then display performance and life compensation accuracy are improved, but system complexity increases
Solution Approach 1:
The patent applies different position weight parameters (first, second, third weight parameters corresponding to different display regions) to different spatial locations within the display. This localized compensation approach improves accuracy by accounting for regional variations in OLED aging characteristics, while the weights are integrated into the existing data processing pipeline without adding significant system complexity
Data Source
AI summary
A compensation system and a compensation method for life attenuation of an organic light emitting diode (OLED) device are provided to include a display data input module, an equivalent life calculation module, an OLED device attenuation degree calculation module, a display position weight ratio module, a life compensation data generation module, and a data compensation and display data output module. The life compensation data generation module is configured to generate final life compensation data according to a feedback result of the OLED device attenuation degree calculation module and the display position weight ratio module.