Electromagnetic Pen Switching Ink and Digital Modes
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Solution Overview
Problem
Existing electromagnetic pens lack the capability to combine electromagnetic input functionality with ink writing, limiting their versatility in interactive technologies such as smart devices and digitizers.
Innovation Solution
The electromagnetic pen incorporates a pen tube assembly with a ferrite core, conductive coil, and a switch mechanism that allows the pen tip to extend and retract, enabling both electromagnetic signal transmission and ink writing functions by altering the contact status between conductive terminals on the circuit board, forming a variable LC circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electromagnetic pen is designed with only electromagnetic input functionality, then the electromagnetic signal transmission is reliable, but the device lacks versatility and cannot perform ink writing
Solution Approach 1:
The patent combines electromagnetic input functionality and ink writing functionality into a single electromagnetic pen device. The electromagnetic writing assembly (with ferrite core and conductive coil) and the ink writing assembly (with ink container and writing tip) are integrated within the same pen body, allowing the device to perform both electromagnetic signal transmission and ink writing operations without requiring separate devices.
Solution Approach 2:
The electromagnetic pen is designed as a multi-functional device that can switch between electromagnetic input mode and ink writing mode. The control unit enables the pen to perform different functions based on user needs, making a single device universal enough to replace both an electromagnetic pen and a traditional ink pen.
2Ease of operation
If the pen tip is always extended for ink writing, then the ink writing function is ready, but the electromagnetic circuit contacts are interrupted
Solution Approach 1:
The pen tip is designed to be movable rather than fixed, capable of extending and retracting along the longitudinal axis of the pen body. This dynamic structure allows the pen tip to change position based on the required function: extended for ink writing and retracted for electromagnetic input, enabling the device to adapt its configuration to different operational modes.
Solution Approach 2:
The conductive device serves as an intermediary mechanical element that transmits the movement of the writing tip to the circuit board. When the writing tip moves axially, it drives the conductive device to push or release the electromagnetic writing assembly, thereby indirectly controlling the contact status of the electromagnetic circuit without requiring direct mechanical connection between the tip and circuit components.
3Reliability
If the pen tip is retracted for electromagnetic input, then the electromagnetic circuit contacts are maintained, but the ink writing function is not ready
Solution Approach 1:
The pen tip is designed to be movable rather than fixed, capable of extending and retracting along the longitudinal axis of the pen body. This dynamic structure allows the pen tip to change position based on the required function: extended for ink writing and retracted for electromagnetic input, enabling the device to adapt its configuration to different operational modes.
4Adaptability or versatility
If a switch mechanism is added to control pen tip extension, then the electromagnetic and ink writing functions can be switched, but the device complexity increases
Solution Approach 1:
The switching between electromagnetic writing and ink writing modes is achieved through the user's natural writing action itself. When the user presses the pen tip against the electromagnetic input apparatus, this action automatically triggers the core mechanism to drive the pen tip to retract or extend, thereby switching the writing mode without requiring a separate control operation or complex switching mechanism.
Solution Approach 2:
The patent replaces a traditional mechanical switch with a core mechanism that responds to the writing force applied by the user. The core mechanism includes a core holder, electromagnetic writing assembly, and ink writing assembly that work together to automatically switch between modes based on the applied force, eliminating the need for a separate mechanical switch.
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 enables the electromagnetic pen to perform both electromagnetic input and ink writing functions effectively, enhancing its usability in smart devices and digitizers by allowing frequency changes in the LC circuit, thus improving user interaction.
Implementation Method 1
The inductor constituted by a ferrite core winded with a metal coil and the capacitor constitute the circuit to transmit and receive electromagnetic signals with the antennas or sensor coils
Implementation Method 2
The frequency variation of the circuit is achieved via changing the capacitance and the inductance
Implementation Method 3
The frequency variation of the circuit is achieved via changing the capacitance and the inductance
Data Source
AI summary
An electromagnetic pen with electromagnetic and ink writing functions is disclosed. The electromagnetic pen includes at least one pen tube assembly, a core mechanism, a pen tip, a ferrite core, a core holder, an elastic conductor and a circuit board. The pen tip and the core are configured in the pen tube assembly and are controlled by the core mechanism.