Touch Pressure Sensitivity Correction Method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Touch pressure sensitivity on touch screens is not uniform due to manufacturing process variations, leading to inconsistent sensitivity across different devices and positions on the screen.
Innovation Solution
A method for correcting touch pressure sensitivity involves generating modeling profile data and set profile data to normalize capacitance changes across the screen, using reference points and linear interpolation to ensure uniform sensitivity, allowing for accurate pressure detection at all positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch pressure sensing is implemented on touch screens, then touch pressure detection capability is improved, but uniform sensitivity across the display surface cannot be achieved
Solution Approach 1:
The patent applies local quality by creating position-specific correction values for different regions of the touch screen. The display surface is divided into multiple regions, and each region receives customized sensitivity correction based on its specific characteristics, allowing uniform pressure sensitivity to be achieved across the entire surface despite manufacturing variations.
Solution Approach 2:
The patent changes the sensitivity parameter dynamically across different positions on the touch screen. By adjusting the correction values as a function of position (x, y coordinates), the system compensates for manufacturing variations and achieves uniform pressure sensitivity detection throughout the display surface.
2Measurement precision
If sensitivity correction is performed for each manufactured product, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent performs preliminary action by pre-calculating and storing correction values in a lookup table during the manufacturing process. This allows the actual pressure sensing to proceed without complex real-time calculations, reducing device complexity while maintaining precision through the use of pre-computed correction data.
Solution Approach 2:
The patent uses a reference touch screen with known uniform sensitivity characteristics as a template. By measuring and comparing the actual touch screen's response against this reference, the system derives correction values that replicate the ideal uniform sensitivity pattern, simplifying the correction process.
Data Source
AI summary
A method for correcting a touch pressure sensitivity may be provided that includes: a modeling profile data generation step of generating modeling profile data on the basis of a plurality of collected profile data; and a set profile data generation step of generating set profile data on the basis of the modeling profile data and a reference data of a predetermined touch input device. As a result, it is possible to correct the touch pressure sensitivity of a predetermined touch input device such that the touch pressure is sensed with a uniform sensitivity on the entire display surface of the touch input device.