SSVEP Visual Pattern Presentation for Field-of-View IoT Control
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Solution Overview
Problem
Existing methods using steady state visually evoked potential (SSVEP) for operating apparatuses do not effectively enable operation of devices arranged in a space, such as IoT devices in a room, due to challenges in accurately estimating the target device and high computational load.
Innovation Solution
A presentation system that includes a first acquisition unit to identify operable apparatuses, a second acquisition unit to determine the user's field of view, and a presentation unit to project visual patterns on identified apparatuses, allowing brain waves to operate these devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If visual stimulation patterns are presented on all apparatuses in space, then the user can operate any apparatus using brain waves, but the computational load increases and estimation accuracy decreases
Solution Approach 1:
The patent applies local quality by presenting visual stimulation patterns selectively only on apparatuses that fall within the user's field of view, rather than uniformly on all apparatuses. This localized approach reduces the overall computational load while maintaining the ability to operate multiple apparatuses, as the system adapts the stimulation presentation to the specific spatial context of each user
Solution Approach 2:
The patent segments the space into regions based on the user's field of view, determining which apparatuses are visible and should receive visual stimulation patterns. This segmentation divides the operational space into active (within field of view) and inactive (outside field of view) zones, reducing the number of apparatuses that require computational resources for stimulation presentation
2Adaptability or versatility
If visual stimulation patterns are presented on all apparatuses in space, then the user can operate any apparatus using brain waves, but the system cannot accurately estimate which apparatus the user intends to operate
Solution Approach 1:
The patent improves target estimation accuracy by concentrating visual stimulation patterns only on apparatuses within the user's field of view. This localized presentation creates a clearer signal for the SSVEP detection system, as the user's brain wave response is generated in response to fewer, more specific stimuli, making it easier to accurately identify which apparatus the user intends to operate
3Productivity
If visual stimulation patterns are continuously presented, then the user can operate apparatuses efficiently, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by continuously monitoring the user's field of view and dynamically updating which apparatuses receive visual stimulation patterns. Rather than continuous presentation on all apparatuses, the system periodically assesses the user's gaze direction and updates stimulation presentation accordingly, maintaining operational efficiency while reducing overall energy consumption through this adaptive, intermittent approach
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
Enables accurate operation of apparatuses in a space by reducing the computational load and maintaining estimation accuracy through selective presentation of visual stimulation patterns only when needed, thus enhancing the usability of SSVEP for IoT devices.
Implementation Method 1
The brain computer interface may be implemented using steady state visually evoked potential (SSVEP). Methods using SSVEP include methods for presenting action options to users. In this method, the mental state of the user is determined from the observation of the SSVEP of the user.
Data Source
AI summary
A presentation system according to the present disclosure includes an acquisition unit, a determination unit, and a presentation unit. The acquisition unit acquires apparatus data indicating a plurality of apparatuses that a user can operate. Then, the acquisition unit acquires user data for specifying a field of view of a user. The determination unit determines an apparatus within a visual field of a user from among the plurality of apparatuses using the apparatus data and the user data. The presentation unit presents a visual pattern on the apparatus determined by the determination unit, the visual pattern enabling a brain wave of the user to operate the apparatus determined.