Touch Pen Tilt Detection Using Conductive Fluid Circuit
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Solution Overview
Problem
Existing touch pens require expensive pressure sensors or Bluetooth modules to detect tilt angles, leading to higher costs and power consumption.
Innovation Solution
A touch pen design incorporating a current detecting circuit and conductive fluid within the pen body, which forms a circuit when tilted, allowing the controller to output control signals based on the tilt angle without the need for these modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensors or Bluetooth modules are used to detect tilt angles, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical sensing systems (pressure sensors, Bluetooth modules) with a fluid-based detection system. Conductive fluid in a cavity forms electrical circuits with electrode groups when the pen is tilted, allowing tilt detection through electrical conductivity changes rather than mechanical sensing. This substitution simplifies the overall device structure while maintaining detection precision.
Solution Approach 2:
The patent utilizes a cavity containing conductive fluid that responds to gravitational force during tilting. The fluid's movement and circuit formation with electrode groups provide a hydraulic/fluid-based mechanism for detecting tilt angles, replacing complex electronic sensing systems with a simpler fluid-dynamics approach.
2Measurement precision
If pressure sensors or Bluetooth modules are used to detect tilt angles, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent replaces power-intensive electronic sensing systems (pressure sensors, Bluetooth modules) with a passive fluid-based detection system. The conductive fluid naturally forms circuits under gravitational influence during tilting, requiring minimal active power consumption compared to electronic sensors that need continuous power supply for operation.
Solution Approach 2:
The conductive fluid system performs self-detection through its own physical properties. When the pen tilts, gravity causes the fluid to move and form circuits with electrode groups automatically, without requiring external power input for the detection mechanism itself. The system uses the pen's own motion and gravitational field to generate detection signals.
3Device complexity
If simple structure is used without pressure sensors or Bluetooth modules, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent changes the detection parameter from mechanical pressure or wireless signal strength to electrical conductivity. By measuring the conductivity of the conductive fluid that forms circuits with electrode groups during tilting, the system achieves precise tilt angle detection through electrical parameter changes rather than complex mechanical or wireless sensing.
Solution Approach 2:
The patent uses the presence or absence of electrical conductivity (analogous to a binary state change) in the conductive fluid to indicate tilt conditions. When the fluid forms a circuit with electrode groups, conductivity changes from non-conductive to conductive, providing clear detection signals for tilt angle measurement without requiring complex sensing hardware.
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 design simplifies the structure, reduces power consumption, and saves costs while maintaining fast response times, enabling users to change output signals by adjusting the pen's tilt posture.
Implementation Method 1
the current detecting circuit is configured to contact the conductive fluid when the pen body is in a tilt posture, form a circuit with the conductive fluid
Implementation Method 2
there is a conductive fluid in the accommodation part, and the accommodation part is connected to the detecting part; the current detecting circuit is configured to contact the conductive fluid when the pen body is in a tilt posture
Data Source
AI summary
A touch pen, a control method thereof, a touch device, a readable storage medium are provided. The touch pen includes a pen body, a controller, a detecting part, an accommodation part. The controller, the detecting part, the accommodation part are on the pen body. The detecting part has a current detecting circuit, there is a conductive fluid in the accommodation part, the accommodation part is connected to the detecting part; at least a part of the current detecting circuit is inside the detecting part, and configured to contact the conductive fluid and form a circuit with the conductive fluid when the pen body is in a tilt posture, and output a corresponding reference value according to magnitude of a current in the circuit. The controller is electrically connected to the current detecting circuit and configured to output a control signal according to the reference value.