Magnetic Substance Around Touch Electrodes for Hover Sensing
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Solution Overview
Problem
Current touch display devices with hover touch functionality consume significant power due to the need for high-voltage signals for touch sensing, which is inefficient in terms of energy usage.
Innovation Solution
Incorporating a magnetic substance around the driving touch electrodes in the touch display device, which enhances the electric field direction and strength, allowing for effective touch sensing at a distance while reducing power consumption by optimizing the electric field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high-voltage signal is applied for touch sensing to enable hover touch function, then touch sensing capability is improved, but power consumption increases significantly
Solution Approach 1:
The patent applies magnetic substances specifically around driving touch electrodes to concentrate and enhance the electric field in specific regions where touch sensing is needed. This localized enhancement allows for effective hover touch detection without requiring high-voltage signals across the entire display, thereby reducing overall power consumption while maintaining touch sensing capability
Solution Approach 2:
The patent changes the physical parameters of the electric field by introducing magnetic substances that alter the field distribution and strength. This parameter modification enables the system to achieve effective touch sensing at lower voltage levels, directly addressing the power consumption issue while preserving measurement precision
2Strength
If magnetic substances are disposed around driving touch electrodes, then electric field strength is enhanced, but device complexity increases
Solution Approach 1:
The magnetic substances are strategically positioned only around driving touch electrodes rather than uniformly across the entire display structure. This localized approach enhances the electric field strength precisely where needed for touch sensing while minimizing the overall complexity of the device structure
Solution Approach 2:
The patent integrates magnetic substances with existing touch electrode structures to create a composite system. This combination allows the magnetic materials to enhance electric field strength without requiring a complete redesign of the touch panel architecture, thus limiting the increase in device complexity
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 enables the implementation of hover touch functionality with reduced power consumption by strengthening the electric field in a vertical direction, enhancing touch sensitivity and accuracy while minimizing energy expenditure.
Implementation Method 1
a magnetic substance disposed around each of the plurality of driving touch electrodes, on the plurality of driving touch electrodes
Data Source
AI summary
A touch display device and a film for the touch display device, capable of increasing power efficiency to provide a hover touch function, by providing a touch display device comprising a display panel having a plurality of subpixels, and having a plurality of data lines and a plurality of gate lines electrically connected with the plurality of subpixels, a touch panel having a plurality of driving touch electrodes positioned to overlap with at least one subpixel among the plurality of subpixels, a touch driving signal for touch sensing applied to one or more driving touch electrodes among the plurality of driving touch electrodes, and a magnetic substance disposed around each of the plurality of driving touch electrodes, on the plurality of driving touch electrodes.