Wearable Blood Flow Input Interface
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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 input information by analyzing changes in blood flow patterns when a user performs actions, effectively expanding the interaction area and improving input efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If wearable devices are designed to be compact and low energy consumption, then device portability and battery life are improved, but input area and input capability deteriorate
Solution Approach 1:
The patent replaces traditional mechanical touch input mechanisms with optical detection methods. Specifically, it uses photoelectric plethysmography (PPG) technology to detect blood flow changes in the body, converting biological signals into input commands. This substitution allows the device to maintain a compact form factor while enabling rich interaction capabilities through non-contact or minimal-contact sensing.
Solution Approach 2:
The patent changes the detection parameter from physical contact (touchscreen, buttons) to physiological parameter changes (blood flow velocity, blood flow volume). By monitoring changes in blood flow parameters caused by body movements, the system can identify user intentions without requiring a large physical input surface, thus resolving the contradiction between device compactness and input capability.
2Weight of moving object
If wearable devices are designed to be compact and low energy consumption, then device portability is improved, but input capability deteriorates
Solution Approach 1:
The patent makes the wearable device universally applicable to various input scenarios by detecting different body movements (wrist movement, finger movement, hand movement) as input commands. The same compact device can recognize multiple types of gestures and physiological signals, providing diverse input capabilities without requiring multiple specialized devices or a large form factor.
Solution Approach 2:
By replacing traditional mechanical input interfaces with optical and physiological sensing, the patent enables a lightweight device to perform complex input functions. The system can detect various body movements and translate them into control commands, giving a compact device the versatility of a much larger input system.
3Device complexity
If traditional input interfaces are used in wearable devices, then device simplicity is maintained, but user interaction efficiency deteriorates
Solution Approach 1:
The patent enables the device to automatically detect and interpret user intentions based on physiological signals without requiring complex user configuration or learning. The system self-adapts to detect blood flow changes corresponding to different gestures and automatically translates them into appropriate input commands, improving input efficiency while keeping the device structure relatively simple.
Solution Approach 2:
The patent replaces complex mechanical input interfaces (physical buttons, touchscreens, knobs) with a simpler optical sensing system that detects physiological changes. This substitution reduces device structural complexity while significantly improving input efficiency, as the system can continuously monitor and respond to body movements without requiring deliberate user interaction with specific hardware elements.
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 using the body as an input interface, allowing for more intuitive and efficient control of electronic devices through recognized actions.
Implementation Method 1
acquire 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
acquire target Doppler measurement information about the first part or a second part that corresponds to the first part
Data Source
AI summary
The present application provides a method and device for determining input information, and relates to the field of a wearable device. The method 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 method and device, the body of the user is used as an input interface, to cause an interaction area to be increased, which helps to improve input efficiency and user experience.