Wearable Blood Flow Input Interface for Expanded Interaction Area
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Solution Overview
Problem
Wearable devices have limited input capabilities due to their small size and low energy consumption, which restricts user interaction and efficiency.
Innovation Solution
A method and device that utilize blood-flow information, such as PPG or Doppler measurement data, to determine user input by analyzing changes in blood flow patterns, allowing the body to serve as an input interface and expanding the interaction area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wearable devices are designed to be compact and consume low energy, then portability and battery life are improved, but input capability and interaction area deteriorate
Solution Approach 1:
The patent replaces traditional mechanical input interfaces (buttons, touchscreens) with a physiological-based input system that detects blood flow changes caused by user actions. This substitution allows the device to maintain compact size and low energy consumption while significantly improving input capability through non-contact, physiology-based sensing.
Solution Approach 2:
The patent introduces blood flow information as an intermediary between user intent and device control. By detecting changes in blood flow patterns caused by user actions (such as fist-making or finger movements), the system translates physiological signals into actionable input commands, thereby enhancing input capability without adding physical interface elements.
2Productivity
If the input area is increased to improve input efficiency, then user interaction capability is improved, but device size and complexity increase
Solution Approach 1:
The patent transitions the input interface from a two-dimensional surface (screen or keyboard) to a three-dimensional physiological dimension by utilizing blood flow dynamics. This allows the entire body (or specific body parts) to become the input interface, effectively increasing the interaction area without physically expanding the device.
Solution Approach 2:
The patent makes the user's body universal as an input interface by utilizing blood flow changes that can be detected regardless of which body part performs the action. This multi-functional approach allows various body movements (fist-making, finger movements, posture changes) to all serve as valid input methods, greatly expanding input efficiency without increasing device area.
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
Enhances input efficiency and user experience by enabling the body to function as an input interface, allowing for more intuitive and efficient control of electronic devices through natural body actions.
Implementation Method 1
acquiring target PPG information about a first part of a body of a user or a second part that corresponds to the first part
Implementation Method 2
target PPG information
Implementation Method 3
target blood-flow information, such as PPG or Doppler measurement data
Data Source
AI summary
The present application provides methods and devices for determining input information, and generally relates to the field of wearable devices. A method disclosed herein comprises: in response to a first part of a body of a user executing an action, acquiring target blood-flow information about the first part or a second part that corresponds to the first part; and determining input information according to the target blood-flow information and reference information. According to the methods and devices, the body of the user is used as an input interface, thus cause an interaction area to be increased, which helps to improve input efficiency and user experience.