CN-121996085-A - Digital pen and system and method for using digital pen

Abstract

A digital pen and a system and method for using the digital pen. The digital pen includes a nib having two tines made of flexible material defining a slit, wherein the slit width thereof varies depending on the pressure applied to the nib and/or the orientation of the digital pen relative to the writing surface. The digital pen further includes a sensor module configured to measure a variable slot width, an orientation detection module configured to determine a position and tilt of the pen relative to the writing surface, and a communication module configured to transmit slot width data and/or orientation data to a connected computing device. The computing device utilizes the slit width data and the orientation data to dynamically control the amount of digital ink dispensed onto the digital paper, thereby simulating the writing experience and ink output of a stationery pen.

Inventors

• Mirren Dimitrov Metodiev

Assignees

• 株式会社和冠

Dates

Publication Date

20260508

Application Date

20250925

Priority Date

20241106

Claims (20)

1. 1. A digital pen, comprising: A nib having two tines made of a flexible material, wherein the two tines define a slit having a variable slit width that varies in response to at least one of pressure applied to the nib or an orientation of the digital pen relative to a writing surface; A sensor module configured to measure the variable slit width; an orientation detection module configured to determine a position and an inclination of the digital pen relative to the writing surface to provide orientation data including at least one of an X-coordinate, a Y-coordinate, a XTilt-angle, or a YTilt-angle, and A communication module configured to transmit at least one of the slot width data or the orientation data to a connected computing device, wherein the computing device utilizes the slot width data and/or the orientation data to dynamically control an amount of digital ink dispensed onto digital paper, thereby simulating a writing experience and ink output of a stationery pen.
2. 2. The digital pen of claim 1, wherein the sensor module comprises: The two capacitor plates are arranged in a row, the two capacitor plates are incorporated within the two tines; an electronic circuit detecting a change in capacitance between the capacitor plates as a function of the slit width, and And a digitizer that converts the detected capacitance into a digital signal representative of the slit width.
3. 3. The digital pen of claim 2, wherein the sensor module comprises an LRC circuit configured to measure a resonant frequency change caused by the change in slot width, wherein the resonant frequency change is converted to a corresponding slot width measurement.
4. 4. The digital pen of claim 2, wherein the sensor module comprises an oscillator circuit configured to detect a frequency shift corresponding to a change in the slit width, wherein the frequency shift is converted to the slit width data.
5. 5. The digital pen of claim 2, wherein the sensor module comprises a bridge circuit configured to compare a capacitance of the slit width to a reference capacitor for detecting a change in the slit width.
6. 6. The digital pen of claim 2, wherein the sensor module measures a time constant for charging and discharging a capacitor through a resistor, wherein the time constant is indicative of the slit width.
7. 7. The digital pen of claim 1, wherein the two tines of the nib are made of a metal alloy that provides both flexibility and durability, allowing consistent performance under varying pressures and orientations.
8. 8. The digital pen of claim 1, wherein the communication module employs a wireless communication protocol to transmit the slit width data and/or the orientation data to the connected computing device.
9. 9. The digital pen of claim 1, wherein the computing device dynamically controls the amount of digital ink dispensed onto the digital paper by adjusting the stroke width and ink density on the digital paper based on an interpretation of the slit width data and/or the orientation data.
10. 10. The digital pen of claim 9, wherein a tip width of the nib is a predefined constant that is communicated to the computing device such that the computing device utilizes the predefined constant in conjunction with the slit width data to calculate the stroke width.
11. 11. A system for writing on digital paper with a digital pen, the system comprising: (a) A digital pen, the digital pen comprising: A nib having two tines made of a flexible material, wherein the two tines define a slit having a variable slit width that varies in response to at least one of pressure applied to the nib or an orientation of the digital pen relative to a writing surface; A sensor module configured to measure the variable slit width; an orientation detection module configured to determine a position and an inclination of the digital pen relative to the writing surface to provide orientation data including at least one of an X-coordinate, a Y-coordinate, a XTilt-angle, or a YTilt-angle, and A communication module configured to transmit at least one of the slit width data or the orientation data, and (B) A computing device configured to receive the slit width data and/or the orientation data from the digital pen, the computing device comprising: A processor; a memory storing instructions executable by the processor; a display screen configured to function as digital paper; wherein the instructions, when executed by the processor, are configured to: Interpreting the slit width data and the orientation data to dynamically control the amount of digital ink dispensed onto the digital paper, and Based on the slit width and/or the position and tilt of the digital pen, the stroke width and ink density on the digital paper are adjusted to simulate the writing experience and ink output of a stationery pen.
12. 12. The system of claim 11, wherein the sensor module of the digital pen comprises at least one of: The system includes two tines, two capacitor plates incorporated within the two tines, an electronic circuit that detects a change in capacitance between the capacitor plates as a function of the slit width, and a digitizer that converts the detected change in capacitance into a digital signal representative of the slit width; an LRC circuit configured to measure a resonant frequency change caused by a change in the slit width, wherein the resonant frequency change is converted to a corresponding slit width measurement; An oscillator circuit configured to detect a frequency shift corresponding to a change in the slit width, wherein the frequency shift is converted into the slit width data, or A bridge circuit configured to compare the capacitance of the slit width to a reference capacitor for detecting a change in the slit width.
13. 13. The system of claim 11, wherein the sensor module of the digital pen measures a time constant for capacitor charging and discharging through a resistor, wherein the time constant is indicative of the slit width.
14. 14. The system according to claim 11, Wherein the two tines of the nib of the digital pen are made of a metal alloy providing both flexibility and durability, allowing consistent performance under varying pressures and orientations, and Wherein the tip width of the pen tip is a predefined constant that is communicated to the computing device such that the computing device utilizes the predefined constant in conjunction with the slit width data to calculate the stroke width.
15. 15. The system of claim 11, wherein the communication module of the digital pen employs a wireless communication protocol to transmit the slit width data and/or the orientation data to the connected computing device.
16. 16. A method of writing on digital paper with a digital pen, the method comprising: Measuring a variable slit width between two tines of a nib of the digital pen, wherein the variable slit width varies in response to at least one of pressure applied to the nib or an orientation of the digital pen relative to a writing surface; Determining a position and tilt of the digital pen relative to the writing surface to provide orientation data, the orientation data including at least one of an X-coordinate, a Y-coordinate, a XTilt-angle, or a YTilt-angle; transmitting, by the digital pen, at least one of the slit width data or the orientation data to a computing device; receiving, by the computing device, the slit width data and/or the orientation data from the digital pen; Interpreting the slit width data and/or the orientation data to dynamically control the amount of digital ink dispensed onto the digital paper, and Based on the slit width and/or the position and tilt of the digital pen, the stroke width and ink density on the digital paper are adjusted to simulate the writing experience and ink output of a stationery pen.
17. 17. The method of claim 16, comprising at least one of: Detecting a change in capacitance between two capacitor plates incorporated within the two tines, the change in capacitance varying with a varying slit width, wherein the change in capacitance is converted to a digital signal representative of the slit width; measuring a change in resonant frequency caused by the change in slit width, wherein the change in resonant frequency is converted to a corresponding slit width measurement; Detecting a frequency shift corresponding to a change in the slit width, wherein the frequency shift is converted into the slit width data, or The capacitance of the slit width is compared with a reference capacitor to detect a change in the slit width.
18. 18. The method of claim 16, comprising measuring a time constant for charging and discharging a capacitor through a resistor, wherein the time constant is indicative of the slit width.
19. 19. The method of claim 16, wherein the two tines of the nib of the digital pen are made of a metal alloy that provides both flexibility and durability, allowing consistent performance under varying pressures and orientations.
20. 20. The method of claim 16, comprising calculating the stroke width using a predefined constant related to a tip width of the nib in conjunction with the slit width data.

Description

Digital pen and system and method for using digital pen Technical Field The present disclosure relates to the field of digital pens, and in particular, to a digital pen (fountain pen) and a system and method of using the digital pen. Background With the rapid growth of digital tablets (pads) such as tablet computers, electronic boards, pen tablets, etc., people have begun taking more and more notes in the form of handwritten data in handwritten documents provided by digital tablets. Handwritten documents offer various advantages over typed documents, such as personal touch by the user handwriting, realism that is particularly important in legal or historic documents, flexibility in customizing and personalizing based on personal requirements of fonts or colors or styles, and time savings by allowing notes to be quickly made. However, conventional digital pens commonly employed with digital writing boards, such as computers, mobile phones, tablet computers, personal Digital Assistants (PDAs), and the like, are typically designed with a cylindrical nib or a tapered nib featuring a rounded tip. These existing digital pens have significant limitations in replicating the tactile and visual writing experience provided by conventional stationery pens. One of the main problems with current digital pens is their inability to mimic the interaction between a conventional pen nib and a writing surface. Such inability results in an inconvenient or unnatural writing experience that lacks dynamic variability in line width or ink flow characteristics of the writing instrument. In addition, existing digital pens do not provide optimal control of ink output during writing, unlike conventional pens, resulting in a less realistic representation of handwriting or drawing. Such non-dynamic ink flow control in conventional digital pens cannot capture the organic changes seen in pen writing, where the ink flow is affected by the pressure exerted by the user and/or the angle at which the user is writing. Thus, there is a need for an improved digital pen that can provide a more satisfactory writing experience and better control of ink output that closely mimics the functionality and feel of a stationery pen. Disclosure of Invention One or more embodiments relate to digital pens and systems and methods of using digital pens. The digital pen and the associated mechanism simulate the writing experience of the traditional stationery pen, and solve the limitations of the traditional digital pen. To this end, digital pens have specially designed nibs and advanced sensing techniques to replicate the tactile and visual aspects of pen writing. The nib consists of two tines made of flexible material with a slit between them, the width of which varies depending on the applied pressure and the orientation of the digital pen relative to the writing surface. In addition, this variation in slit width is used to select ink flow and stroke width to mimic the behavior of a conventional pen nib. In order to accurately capture and utilize the variation in slit width, digital pens are equipped with sensor modules. The sensor module includes capacitor plates (plates) embedded within the two tines of the pen tip such that as the slit width changes, the capacitance between these plates changes and is then detected by the electronic circuit. Various methods may be employed to measure these capacitance changes, including LRC circuits, oscillator circuits, bridge circuits (e.g., wheatstone bridges), time constant measurement techniques, and application specific integrated circuits designed for capacitive sensing. These measurements (measurements) are converted into digital signals representing the real-time slit width. In addition to the sensor module for measuring slit width, the digital pen also includes an orientation detection module that determines the position and tilt of the digital pen, providing data such as X and Y coordinates and XTilt (X tilt) and YTilt (Y tilt) angles. The integrated dataset allows for precise control of writing dynamics so that a computing device, i.e., a digital tablet (such as a tablet, electronic board, pen tablet, etc.), can adjust stroke width and ink density based on both slit width and pen orientation. For such adjustment, the digital pen transmits the slot width data and orientation data to the connected computing device via a communication module that can utilize a wireless communication protocol for seamless data transmission. A computing device equipped with a processor and memory interprets the received data to control the digital ink output on a display screen that acts as a digital paper. The software dynamically adjusts the stroke width and ink density, creating a realistic writing experience that closely reflects the writing experience with conventional pens. Embodiments of the present disclosure relate to a digital pen. The digital pen includes a nib having two tines made of a flexible material and defining a sl