Stretchable Display Image Correction Using Electrical Stretch Sensing
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Solution Overview
Problem
Existing stretchable display devices face challenges in maintaining display quality during stretching due to changes in pixel distribution and electrical characteristics, leading to image distortion and reduced performance.
Innovation Solution
A processor in the display device corrects image data based on stretch compensation using a lookup table that accounts for stretch ratios and electrical characteristic changes, such as capacitance or resistance, to maintain image quality during deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is stretched to transform into various forms, then the adaptability and form flexibility are improved, but the display quality and image accuracy deteriorate due to pixel distribution changes and electrical characteristic variations
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction data in a lookup table that corresponds to various stretch ratios and sensor positions. Before actual stretching occurs, the system prepares correction algorithms and data structures that will be used during operation. When stretching happens, the processor simply retrieves pre-computed correction data based on the current stretch state, enabling rapid compensation without real-time complex calculations.
Solution Approach 2:
The patent implements feedback through a sensor that continuously monitors the stretched state of the display device and provides real-time data to the processor. The sensor detects changes in electrical characteristics (such as resistance or capacitance variations) caused by stretching, and this feedback information is used by the processor to dynamically adjust and correct image data, maintaining display quality throughout the stretching process.
2Manufacturing precision
If image data is corrected in real-time during stretching, then the display quality is maintained, but the processing complexity and computational load increase
Solution Approach 1:
The patent reduces processing complexity by performing the computationally intensive correction calculations in advance and storing the results in a lookup table. Instead of performing complex real-time calculations during stretching, the processor simply retrieves pre-computed correction data based on sensor readings, significantly reducing the computational burden during operation.
Solution Approach 2:
The patent uses a lookup table that contains pre-computed correction data representing different stretch states. Rather than calculating corrections from scratch during operation, the system copies and applies pre-prepared correction data that corresponds to the current stretch ratio, simplifying the processing required during actual display operation.
3Measurement precision
If the sensor covers the entire display area to accurately detect stretch, then the measurement precision is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the display area into multiple regions, each with its own sensor or sensor group. Rather than using a single complex sensor covering the entire area, the display is segmented into zones that can be independently monitored. This approach reduces the complexity of individual sensor units while maintaining comprehensive coverage through coordinated measurement of multiple segments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively adjusts image data to compensate for stretching, ensuring consistent display quality and performance across various forms and configurations of the display device.
Implementation Method 1
electrical characteristic change for each coordinate of a sensor, and correction data may be determined based on an emission area ratio according to a stretch ratio. The electrical characteristic change may be a capacitance change amount, and the stretch sensing unit may be configured to determine at least one stretch range based on a stretch location having a minimum capacitance change amount and a stretch location having a maximum capacitance change amount
Data Source
AI summary
A stretchable display device including a processor configured to correct image data for stretch compensation is provided. The processor is configured to receive from a stretch sensing unit of the display device stretch data including a stretch location, a stretch range, and a stretch ratio, determined based on an electrical characteristic change for each coordinate of a touch sensor of the display device and correct the image data corresponding to pixels of the display device based on the stretch data and a lookup table including a relation between a stretch ratio and correction data. The correction data may be determined based on at least one of a efficiency change of a light-emitting device according to a stretch ratio, a characteristic change of a thin-film transistor, or an emission area ratio.