Local AR Movement Calculation via Capacitive Sensor Film
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Solution Overview
Problem
Conventional augmented reality (AR) devices experience delays due to the burden on external servers when users interact with projected images, as they require signal transmission and feedback, leading to inefficiencies in user interaction.
Innovation Solution
A measurement system comprising a film with a patterned structure layer and a sensor that generates sensing signals during relative movement, allowing for the calculation of movement information such as distance and speed without direct electrical connection, thereby reducing server load and improving feedback speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the AR device transmits signal to an external server for processing user interactions, then the server can perform complex operations, but this increases the burden on the external server and causes delay in feedback
Solution Approach 1:
The patent extracts the movement information calculation function from the external server and implements it locally within the AR device. The sensor generates sensing signals that are processed by a movement information calculator in the AR device itself, eliminating the need to transmit data to and receive feedback from an external server, thus resolving the feedback delay while maintaining processing capability
Solution Approach 2:
The AR device performs self-processing of movement information by incorporating a movement information calculator that directly processes sensing signals generated by the sensor. This self-service approach eliminates dependency on external servers for basic movement calculations, reducing server burden and enabling immediate local processing of interaction data
2Reliability
If the sensor is electrically isolated from the film, then electrical interference is reduced and selective contact is achieved, but the sensor must still generate accurate sensing signals during relative movement
Solution Approach 1:
The patent introduces a dielectric layer as an intermediary between the sensor and the film's patterned structure layer. This dielectric layer enables the sensor to be electrically isolated from the film while still allowing capacitive coupling for sensing relative movement. The sensor detects changes in capacitance caused by the patterned structure layer's movement without direct electrical contact, maintaining signal accuracy while achieving electrical isolation
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
This solution enables quick and efficient calculation of movement information, reducing server burden and enhancing interaction speed by processing data locally within the AR device, thus improving user experience and reducing latency.
Implementation Method 1
the sensor is electrically isolated from and selectively contacts the film... generate a sensing signal during a relative movement process
Data Source
AI summary
A measurement system and a measurement method using the same are provided. Firstly, a measurement system is provided. The measurement system comprises a film, a sensor and a movement information calculator, wherein the film has a patterned structure layer, and the sensor is electrically isolated from and selectively in contact with the film. Then, the sensor directly contacts the patterned structure layer and generates a sensing signal during relative movement process between the sensor and the film. Then, the movement information calculator obtains at least one of a relative movement amount and a relative movement speed during the relative movement process according to the sensing signal.