Touch Screen Display Pixel Shift Correction Lookup Table
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Solution Overview
Problem
Touch screen display devices face issues with reduced touch detection accuracy and increased time delay due to pixel deterioration and image quality degradation, as well as incorrect touch position detection resulting from pixel shifting without awareness by the touch sensor hardware.
Innovation Solution
A touch screen display device with an image corrector that converts first image data to second image data and generates a lookup table to correct touch positions, using pixel shift information to associate first and second touch positions, thereby improving detection accuracy and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pixel shifting is applied to prevent screen burning, then image quality is improved, but touch position detection accuracy deteriorates
Solution Approach 1:
The patent introduces a lookup table as an intermediary component that maps between original touch positions and shifted display positions. This lookup table acts as a mediator that translates touch coordinates without requiring changes to the touch sensor hardware, thereby maintaining touch detection accuracy while enabling pixel shifting for image quality improvement.
Solution Approach 2:
The patent creates a virtual copy of the touch position data through coordinate transformation. Instead of physically modifying the touch sensor or display hardware, it generates transformed coordinate data that represents the relationship between original and shifted positions, allowing accurate touch detection despite pixel shifting.
2Stability of the object's composition
If pixel shifting is applied to prevent screen burning, then image quality is improved, but response time increases
Solution Approach 1:
The lookup table is pre-generated and stored before actual touch detection occurs. By preparing the coordinate transformation mapping in advance, the system avoids real-time calculation delays during touch events, thus maintaining fast response times while enabling pixel shifting for image quality improvement.
Solution Approach 2:
The patent uses pre-computed coordinate transformation data stored in the lookup table, avoiding real-time mathematical transformations. This copying of pre-calculated position relationships significantly reduces processing time compared to performing coordinate conversions during actual touch detection.
3Device complexity
If touch sensor hardware remains unchanged, then device complexity is reduced, but touch position accuracy deteriorates due to pixel shifting
Solution Approach 1:
The patent introduces a software-based lookup table as an intermediary layer between the unchanged touch sensor hardware and the pixel-shifted display. This mediator translates touch coordinates without requiring hardware modifications, thus maintaining simple device architecture while correcting touch position accuracy.
Solution Approach 2:
The patent replaces potential hardware modifications with a software-based coordinate transformation system. Instead of changing the physical touch sensor or display hardware to accommodate pixel shifting, it uses computational methods to correct touch positions, thereby maintaining hardware simplicity while improving accuracy.
Data Source
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AI summary
A touch screen display device includes: an image corrector for converting first image data for displaying on pixels to second image data for displaying on the pixels, and for generating a lookup table based on the conversion; and a processor for correcting second touch positions based on the second image data to first touch positions based on the first image data using the lookup table. A method of driving a touch screen display device includes converting first image data for displaying on pixels to second image data for displaying on the pixels, generating a lookup table based on the conversion, and correcting second touch positions based on the second image data to first touch positions based on the first image data by using the lookup table.