Temperature-Based Pixel Drive Compensation for Display Artifacts
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Solution Overview
Problem
Electronic displays experience visible artifacts such as edge-ghosting, spatial stretching, and color fringing due to transient response variations and temperature fluctuations, particularly in modes that adjust display colors based on ambient lighting.
Innovation Solution
Implement a display pipeline that processes image data using pixel drive compensation, accounting for temperature variations and multi-frame history to modify image data, reducing memory bandwidth requirements by interpolating lookup table values and applying drive compensation based on previous image frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel drive compensation is applied to reduce visual artifacts, then image quality is improved, but memory bandwidth consumption increases
Solution Approach 1:
The patent pre-calculates and stores compensation values in lookup tables during manufacturing or initialization, so that during operation only table lookups and simple interpolations are needed. This preliminary preparation of compensation data eliminates the need for complex real-time calculations, thereby improving image quality while minimizing runtime memory bandwidth consumption.
Solution Approach 2:
The patent uses temperature sensor readings to select from multiple pre-calibrated lookup tables corresponding to different temperature ranges. By changing the parameter (temperature) and selecting the appropriate pre-computed table, the system achieves temperature-compensated display without requiring real-time computation of compensation values, thus maintaining low memory bandwidth usage.
2Stability of the object's composition
If temperature-based compensation is implemented, then display uniformity is improved, but device complexity increases
Solution Approach 1:
The patent introduces temperature sensors as intermediary devices that measure panel temperature and use this information to select appropriate compensation parameters. This intermediary measurement step simplifies the overall control logic by providing a direct mapping from temperature readings to pre-determined compensation values, avoiding complex real-time thermal modeling while achieving display uniformity.
Solution Approach 2:
The patent changes the operational parameter from direct pixel control to temperature-based lookup table selection. By measuring temperature and selecting from pre-calibrated tables for different temperature ranges, the system achieves temperature compensation with minimal additional complexity, as the complex compensation calculations are performed offline during table generation.
3Reliability
If multi-frame history is used for drive compensation, then transient response is improved, but power consumption increases
Solution Approach 1:
The patent pre-determines compensation values based on historical frame data during off-line calibration or initialization, storing the results in lookup tables. During actual display operation, the system only needs to perform simple table lookups and interpolations rather than complex multi-frame analysis, thereby achieving improved transient response while minimizing real-time power consumption.
Solution Approach 2:
The patent uses a simplified version of multi-frame history by only considering the immediately preceding frame and using linear interpolation between lookup table values, rather than analyzing multiple historical frames in full detail. This partial use of historical information provides sufficient transient response improvement while keeping computational power consumption low.
Data Source
AI summary
Image data for a current image frame may be compensated for transient response variations due to variations at various positions of the display panel by performing pixel drive compensation. The pixel drive compensation may be performed based at least in part upon a multi-frame history of the display panel. In this way, drive compensation corresponding to multi-frame history of a display panel may be implemented.