Electroluminescent Display Compensation Gain Reset
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Solution Overview
Problem
Electroluminescent display devices face issues with luminance nonuniformity due to pixel deterioration deviations, requiring large memory capacity and increased initial startup time to compensate for these deviations.
Innovation Solution
An electroluminescent display device with a compensation gain calculation circuit that resets stress accumulation values in memory whenever the compensation gain increases, reducing memory capacity by storing only stress accumulation values for each period, thus minimizing memory requirements and eliminating the need for additional data compression logic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stress accumulation values are continuously stored in memory to compensate for pixel deterioration, then compensation accuracy is improved, but memory capacity requirements increase
Solution Approach 1:
The patent resets stress accumulation values in memory whenever the compensation gain increases. This discarding of old stress data that is no longer needed maintains compensation accuracy while significantly reducing memory capacity requirements, as the system only retains stress values relevant to current compensation levels.
Solution Approach 2:
The system performs periodic resetting of stress accumulation values based on compensation gain thresholds. This periodic action ensures that memory is cleared at appropriate intervals when compensation gains increase, maintaining measurement precision while preventing unbounded memory growth.
2Reliability
If large memory capacity is allocated for storing stress accumulation values, then compensation performance is improved, but initial startup time increases
Solution Approach 1:
By resetting stress accumulation values when compensation gain increases, the system reduces the amount of data that needs to be loaded into memory during initial startup. This discarding of unnecessary historical stress data directly reduces power-on time while maintaining compensation performance through selective retention of relevant stress values.
3Measurement precision
If stress accumulation values are stored for extended periods, then long-term compensation accuracy is improved, but memory capacity requirements increase
Solution Approach 1:
The patent implements a strategy of discarding old stress accumulation values when compensation gain increases, keeping only the most recent relevant stress data. This ensures long-term compensation accuracy is maintained through selective retention while preventing memory capacity from growing indefinitely.
Solution Approach 2:
The system dynamically adjusts which stress accumulation values are retained in memory based on compensation gain levels. As compensation gain increases, older stress values are discarded and newer ones are retained, creating a dynamic memory management system that adapts to changing compensation requirements over time.
Data Source
AI summary
Electroluminescent display devices and a method for driving the same are disclosed. An electroluminescent display device according to an embodiment of the present disclosure includes a display panel including a plurality of pixels emitting light according to image data, a first memory storing a stress accumulation value corresponding to the image data, and a compensation gain calculation circuit configured to increase a compensation gain for compensating for the image data on the basis of the stress accumulation value, wherein the stress accumulation value in the first memory is reset whenever the compensation gain increases.