Electromagnetic Touch Screen Coil Layout for Faster Stylus Reporting
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Solution Overview
Problem
Existing electromagnetic styluses suffer from unsatisfactory touch reporting accuracy and poor touch performance due to complex driving circuits requiring longer signal transmission times and higher impedance, especially in integrated designs, leading to suboptimal touch experience on electromagnetic touch screens.
Innovation Solution
The electromagnetic touch screen employs a unique arrangement of transmitting and receiving coils with multiple turns, arranged in different planes and layers, and connected to a control chip, allowing sequential or periodic drive signals to improve touch accuracy by separating transmitting and receiving functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each coil transmits and receives signals for each drive in electromagnetic styluses, then the stylus can achieve electromagnetic touch functionality, but the overall time for one reporting point becomes longer and impedance increases
Solution Approach 1:
The patent divides the coil system into separate transmitting coils and receiving coils, with transmitting coils dedicated to signal transmission and receiving coils dedicated to signal reception. This segmentation allows simultaneous operation of transmission and reception functions without interference, reducing the time required for each reporting point by eliminating the sequential transmission-reception cycle needed in integrated coils.
Solution Approach 2:
The patent arranges transmitting and receiving coils in different spatial planes and layers, creating a three-dimensional configuration where transmitting coils are positioned in one plane and receiving coils in another. This spatial separation enables independent operation of transmission and reception functions, reducing impedance and reporting time while maintaining electromagnetic touch functionality.
2Ease of operation
If each coil transmits and receives signals for each drive, then electromagnetic touch functionality is achieved, but impedance becomes higher and charging time increases
Solution Approach 1:
By separating the coil functions into dedicated transmitting and receiving coils, the patent reduces the impedance that would otherwise result from integrated coils needing to perform both transmission and reception. This segmentation allows for more efficient signal transmission and faster charging times while maintaining full electromagnetic touch functionality.
Solution Approach 2:
The three-dimensional arrangement of transmitting and receiving coils in different planes reduces impedance by eliminating the interference and signal path conflicts present in integrated coil designs. This spatial separation enables faster energy transfer and shorter charging times while preserving electromagnetic touch operation.
3Ease of operation
If complex driving circuits are used in electromagnetic styluses, then electromagnetic touch functionality is achieved, but touch reporting accuracy deteriorates
Solution Approach 1:
The patent segments the driving circuits into separate transmitting and receiving circuit paths, which simplifies the overall circuit complexity while improving touch reporting accuracy. By isolating transmission and reception functions, the patent eliminates signal interference and reduces the computational complexity needed for processing, thereby improving measurement precision without sacrificing functionality.
Solution Approach 2:
The spatial separation of transmitting and receiving coils in different planes enables simpler, more accurate signal processing by eliminating electromagnetic interference between transmission and reception paths. This dimensional separation reduces circuit complexity while improving touch reporting accuracy through cleaner signal paths and reduced noise.
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
This configuration significantly reduces reporting time and enhances touch sensitivity and accuracy by optimizing coil interactions, ensuring faster and more precise touch detection.
Implementation Method 1
a plurality of transmitting coils and a plurality of receiving coils, the plurality of transmitting coils and the plurality of receiving coils being respectively arranged on a base
Implementation Method 2
the plurality of transmitting coils and the plurality of receiving coils being respectively arranged on a base
Data Source
AI summary
The present disclosure provides an electromagnetic touch screen and an electromagnetic touch device including the electromagnetic touch screen. The electromagnetic touch scree includes receiving coils and transmitting coils. The transmitting coils are correspondingly arranged in a peripheral area around the receiving coils. The transmitting coils are configured to transmit transmitting signals through which a first magnetic field is generated to charge the stylus before a touch operation, and the receiving coils are configured to generate receiving signals during the touch operation.