Active Stylus Identification for Collaborative Touch Editing
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Solution Overview
Problem
Current electronic devices with touch-sensitive displays face challenges in efficiently enabling collaborative editing and voting during electronic meetings, particularly in accurately identifying and authorizing active stylus inputs for shared document modifications and voting processes.
Innovation Solution
The system employs a touch-sensitive display device and an active stylus that utilize a stylus sensor system to detect non-contact and contact motions, along with unique identification signals, to enable editing and voting functionalities. The processor interacts with the stylus sensor to render shared documents and manage edits and votes, ensuring accurate tracking and authorization of contributions from multiple participants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch-sensitive display is used for collaborative editing during electronic meetings, then ease of operation is improved, but difficulty of detecting and measuring active stylus inputs worsens
Solution Approach 1:
The patent replaces traditional mechanical or passive touch detection with an active electromagnetic field-based detection system. The active stylus contains electromagnetic components that generate detectable signals, allowing the system to distinguish active stylus inputs from passive touches with high precision, thereby solving the detection difficulty while maintaining ease of operation.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the active stylus and the touch-sensitive display. This field acts as a mediator that carries identification signals and motion data from the stylus to the display controller, enabling accurate detection and authorization of stylus inputs without direct mechanical contact complexity.
2Reliability
If unique identification signals are implemented for active stylus authorization, then reliability is improved, but device complexity worsens
Solution Approach 1:
The patent implements a universal identification signal system where the active stylus contains electromagnetic components that serve multiple functions: identification, authorization, and motion tracking. This multi-functional approach increases reliability by ensuring accurate stylus verification while avoiding the need for separate complex authorization hardware, thus managing device complexity.
Solution Approach 2:
The active stylus autonomously generates and transmits its own unique identification signals through its electromagnetic components. This self-service capability allows the stylus to automatically authenticate itself with the touch-sensitive display without requiring external authorization hardware or complex verification systems, thereby improving reliability while keeping the overall system relatively simple.
3Measurement precision
If stylus sensor system detects non-contact and contact motions, then measurement precision is improved, but use of energy worsens
Solution Approach 1:
The patent employs periodic electromagnetic signal transmission from the active stylus rather than continuous transmission. The stylus emits identification and motion signals at specific intervals during use, which maintains high measurement precision for detecting both contact and non-contact motions while significantly reducing overall energy consumption compared to continuous signal emission.
Data Source
AI summary
An electronic meeting is attended by participants with touch-sensitive display devices. An electronic meeting server allows a group of selected participants to edit a shared document during the meeting. Another group of participants may cast votes during the meeting using objects at least partially created during the meeting. Each participant has an active stylus for interfacing with a touch-sensitive display device during the meeting. The active stylus has a stylus identification signal associated with each participant. The stylus identification signal allows for selection and management of the editing and voting groups and allows multiple participants to share a touch-sensitive display device.