Touch Panel Magnetic Field Generation for Wireless Power
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Solution Overview
Problem
Current touch panels in mobile terminals lack the ability to wirelessly power wireless input apparatuses and effectively determine pressure levels and touch presence, limiting their functionality and user interface enhancements.
Innovation Solution
A touch panel with a magnetic field generation unit under its edges, which includes a loop coil to generate a resonance power, and a wireless input apparatus with a pressure sensor and coil that receives power from the touch panel, allowing for the determination of touch presence and pressure levels through changes in magnetic field resistance and distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a touch panel is designed with traditional structures to reduce weight and thickness, then the weight and thickness are reduced, but the ability to wirelessly power input devices and detect pressure levels is lost
Solution Approach 1:
The magnetic field generation unit is integrated into the touch panel structure, enabling it to perform multiple functions: generating magnetic fields for wireless power transmission, detecting touch pressure levels, and determining presence of input devices, all within a single component system that maintains reduced weight and thickness
Solution Approach 2:
The patent combines the magnetic field generation unit with the touch panel structure, merging previously separate functions (power supply, touch detection, pressure sensing) into an integrated system that achieves versatility without increasing weight or thickness
2Length of stationary object
If a touch panel uses simple structures to maintain thinness, then thickness is reduced, but the precision of pressure detection and touch presence determination is limited
Solution Approach 1:
The magnetic field generation unit is strategically positioned at specific locations within the touch panel structure, creating localized magnetic field regions that enhance pressure detection precision at critical areas while maintaining overall panel thinness
3Adaptability or versatility
If additional power supply components are added to enable wireless power transmission, then wireless power capability is achieved, but the weight and complexity of the device increases
Solution Approach 1:
The magnetic field generation unit serves multiple purposes simultaneously: it generates magnetic fields for wireless power transmission, detects touch pressure levels through magnetic field interactions, and determines presence of input devices, thereby achieving versatility without requiring separate dedicated components for each function
Solution Approach 2:
The magnetic field generation unit utilizes the existing touch panel structure and materials to enable wireless power transmission, rather than requiring completely separate power supply infrastructure, thereby reducing overall system 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
Enables wireless power supply to input devices and precise detection of touch pressure and presence, enhancing user interaction and interface capabilities without the need for additional power supply components.
Implementation Method 1
a magnetic field generation unit provided under edges of the touch sensing unit to generate a magnetic field
Implementation Method 2
The magnetic field generation unit may generate and outputs a resonance power, using a magnetic field with a specific resonance frequency
Implementation Method 3
The pressure sensor may sense the pressure applied to the front end based on a resistive of the pressure sensor which is changeable based on a strength of a magnetic field generated in the coil
Implementation Method 4
The coil may receive the power from the loop coil provided in an edge of the touch panel
Implementation Method 5
The coil may have the same resonance frequency as the loop coil
Data Source
AI summary
There is disclosed a touch panel, a mobile terminal and a wireless input apparatus applied to the touch panel and the mobile terminal and the touch panel includes a cover unit having a touchable front surface and a rear surface opposite to the front surface, a touch sensing unit provided under the back surface to sense a preset touch signal, and magnetic field generation unit provided under edges of the touch sensing unit to generate a magnetic field.