Portable Device Display Compensation Using Shared System Resources
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Solution Overview
Problem
Existing portable electronic devices face complexity in managing OLED display issues such as aging, non-uniformity, and temperature, which require dedicated resources for compensation calculations, making the system cumbersome and power-intensive.
Innovation Solution
The system simplifies by moving OLED display panel measurement to an offline stage, allowing sharing of resources like the timing controller, measurement scheduler, and memory interface, enabling sequential measurements and reducing the need for simultaneous driving and measurement, with prioritization based on available battery resources and display usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated resources are used for OLED display compensation calculations, then measurement precision and compensation accuracy are improved, but device complexity and power consumption increase
Solution Approach 1:
The patent implements a measurement scheduler that coordinates multiple measurement methods (e.g., ELDO, PLOT, PLEDO) using shared system resources rather than dedicated hardware. The timing controller manages sequential execution of different measurement protocols, allowing the same resources to serve multiple compensation functions throughout the display's operational lifetime, thereby reducing device complexity while maintaining measurement precision
Solution Approach 2:
The system performs display panel measurements and calculates compensation parameters during an offline stage before actual display operation begins. This preliminary measurement approach allows comprehensive characterization of the display panel using system resources without requiring dedicated measurement hardware during operation, reducing both device complexity and power consumption while achieving high measurement precision
2Measurement precision
If dedicated resources are used for OLED display compensation calculations, then compensation accuracy is improved, but power consumption increases
Solution Approach 1:
The patent performs display panel measurements and calculates compensation parameters during an offline stage before actual display operation begins. This preliminary measurement approach allows comprehensive characterization of the display panel using system resources without requiring dedicated measurement hardware during operation, reducing both device complexity and power consumption while achieving high measurement precision
Solution Approach 2:
The measurement scheduler implements periodic measurement cycles where the system alternates between measurement modes and display driving modes. During operation, measurements are performed periodically rather than continuously, allowing system resources to be shared between display output and compensation measurements, thereby reducing power consumption while maintaining compensation accuracy through regular updates
3Productivity
If simultaneous driving and measurement are performed, then productivity is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent segments the measurement process into distinct phases (e.g., ELDO for emission characteristics, PLOT for optical characteristics, PLEDO for electrical characteristics) that can be executed sequentially. The measurement scheduler divides the measurement timeline into discrete slots, allowing system resources to be allocated to different measurement tasks in a structured manner, reducing complexity while maintaining productivity through systematic resource management
Solution Approach 2:
The system dynamically switches between measurement modes and display driving modes based on operational requirements. The measurement scheduler adjusts measurement timing and resource allocation in real-time, allowing the system to adapt resource usage to current needs, thereby reducing complexity compared to simultaneous operation while maintaining productivity through flexible scheduling
Data Source
AI summary
A system including a display module and a system module. The display module is integrated in a portable device with a display communicatively coupled to one or more of a driver unit, a measurement unit, a timing controller, a compensation sub-module, and a display memory unit. The system module is communicatively coupled to the display module and has one or more interface modules, one or more processing units, and one or more system memory units. At least one of the processing units and the system memory units is programmable to calculate new compensation parameters for the display module during an offline operation.