Touch Screen Pen Ring-Back Topology for Orientation Data
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Solution Overview
Problem
Current touch screen technologies face challenges in accurately interpreting inputs from pens, particularly in terms of orientation, pressure, and additional data transmission, which limits the precision and functionality of pen interactions with touch screens across different devices and manufacturers.
Innovation Solution
The implementation of a ring-back topology using an inverting charge integrator and amplifier, combined with advanced AC coupling circuits and sense-regulation circuits, allows the pen to transmit additional data such as orientation and pressure information back to the touch screen, enabling enhanced interaction and authentication, while also receiving feedback for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple touch input is used, then the ease of operation is improved, but the measurement precision of pen interactions deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the touch screen provides signals to the pen, and the pen processes these signals through an inverting charge integrator and inverting amplifier to generate response signals that are sent back to the screen. This feedback loop enables the system to interpret additional data such as orientation and pressure, thereby improving measurement precision while maintaining ease of operation.
Solution Approach 2:
The patent introduces an intermediary signal processing system consisting of an inverting charge integrator and an inverting amplifier that acts as a mediator between the touch screen and the pen. This intermediary processes the signals to extract additional information about pen interactions, enabling precise measurement of orientation and pressure without complicating the user interface.
2Loss of information
If additional data transmission is implemented, then the quantity of information is improved, but the device complexity increases
Solution Approach 1:
The patent makes the pen multi-functional by enabling it to both receive signals from the screen and transmit processed information back to the screen. The same hardware components (inverting charge integrator and inverting amplifier) serve multiple purposes: processing incoming signals and generating outgoing response signals, thereby increasing information transmission without proportionally increasing device complexity.
Solution Approach 2:
The patent combines the functions of signal reception, processing, and response generation into a unified system within the pen. The inverting charge integrator and inverting amplifier are integrated to work together, merging multiple signal processing functions into a compact configuration that transmits additional data without significantly increasing overall device complexity.
3Reliability
If ring-back topology is used, then the reliability of signal transmission is improved, but the device complexity increases
Solution Approach 1:
The ring-back topology implements a feedback mechanism where the pen receives signals from the screen, processes them through the inverting charge integrator and inverting amplifier, and sends response signals back to the screen. This feedback loop enhances the reliability of signal transmission by ensuring that the screen receives confirmed and processed information from the pen, improving interaction accuracy.
Solution Approach 2:
The patent enables the pen to serve itself by autonomously processing the signals it receives from the screen through its integrated inverting charge integrator and inverting amplifier. The pen independently generates response signals without requiring external processing, thereby improving transmission reliability while keeping the added complexity contained within the pen itself.
Data Source
AI summary
A method includes transmitting, by a touch screen device, signals on electrodes. The method further includes detecting, by a pen, a signal of the signals via an electrode of the electrodes. The method further includes creating, by the pen, a representation of the signal and transmitting the representation of the signal in accordance with a pen recognition signal format. The method further includes detecting, by the touch screen device, a change in the electrical characteristic of the electrode that is caused by the representation of the signal. The method further includes determining, by the touch screen device, that the pen is causing the change to the electrical characteristic of the electrode based on the pen recognition signal format.