Dual-Loop Display Sensing for Aging and Temperature Compensation
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Solution Overview
Problem
Existing display technologies face challenges in fully compensating for both temperature and aging variations in display panels, as external compensation methods often only address one factor at a time, leading to incomplete correction of artifacts.
Innovation Solution
Implementing a dual-loop compensation scheme with a fast loop for low-spatial varying temperature and aging variations, and a slow loop for high-spatial varying aging variations, allowing for independent compensation and application of corrections to image data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-loop external compensation method is used, then one type of variation (temperature or aging) can be compensated, but the other type of variation remains uncompensated, resulting in incomplete artifact correction
Solution Approach 1:
The compensation system is segmented into two independent loops: a fast loop for temperature compensation and a slow loop for aging compensation. Each loop independently processes its specific variation type, allowing both to be compensated simultaneously without interference, thus achieving complete multi-factor compensation.
Solution Approach 2:
The dual-loop compensation system provides universal compensation capability by integrating both temperature and aging compensation functions into a unified framework. The system can handle multiple types of variations through a single coordinated mechanism, enhancing adaptability while maintaining reliability.
2Manufacturing precision
If sensing is performed to correct display artifacts, then artifact correction is achieved, but the sensing process takes time causing delays in displaying corrected output
Solution Approach 1:
The compensation system uses periodic sensing with different frequencies for different loops. The fast loop performs sensing at a higher frequency to capture rapid temperature changes, while the slow loop uses lower frequency for gradual aging variations. This periodic action ensures accurate correction without excessive delay by matching sensing frequency to the rate of variation.
Solution Approach 2:
The system dynamically adjusts the compensation response by using a fast loop for rapid temperature compensation and a slow loop for gradual aging compensation. This dynamic approach optimizes response time by applying the appropriate compensation speed for each variation type, achieving both accuracy and timeliness.
3Object-affected harmful factors
If compensation is applied for temperature variations, then temperature-induced artifacts are reduced, but aging-induced artifacts remain, and vice versa
Solution Approach 1:
The harmful factors are segmented into temperature-induced and aging-induced artifacts, each handled by a dedicated compensation loop. The fast loop specifically targets temperature variations while the slow loop addresses aging variations, ensuring that each type of artifact is compensated without being affected by the other.
Solution Approach 2:
The system changes the compensation parameters by using different time constants and sensing frequencies for temperature and aging compensation. The fast loop uses short time constants for rapid temperature response, while the slow loop uses longer time constants for gradual aging compensation, effectively addressing both harmful factors simultaneously.
Data Source
AI summary
Devices, storage media, and methods for compensating for aging and temperature variations using dual-loop compensation are provided. The compensating for temperature and aging variations of one or more pixels of the display using a coarse scan loop updated at a faster rate. Compensation also includes compensating for aging variations of the one or more pixels of the display using a fine scan loop updated at a slower rate.