Image Display User Positioning With Proximity and Acoustic Sensing
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Solution Overview
Problem
Image display devices face challenges in accurately determining user position due to the limitations of proximity sensors and the high power consumption and security risks associated with using cameras for continuous image acquisition.
Innovation Solution
An image display device equipped with a proximity sensor and multiple microphones to detect and determine user position based on sound signals, eliminating the need for cameras.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera is used to accurately determine user position, then measurement precision is improved, but use of energy increases and device complexity increases
Solution Approach 1:
The patent replaces the optical measurement system (camera) with an acoustic measurement system (microphones). Instead of using image processing to determine user position, the system uses sound signal processing with multiple microphones to achieve the same positioning function with lower power consumption and without the security concerns of continuous image capture.
Solution Approach 2:
The patent introduces sound signals as an intermediary medium to determine user position. By using sound waves that propagate from the user to multiple microphones, the system can calculate position based on time difference of arrival and signal intensity, avoiding the need for direct visual capture while maintaining positioning accuracy.
2Measurement precision
If a camera is used to continuously acquire images for user position detection, then measurement precision is improved, but loss of time increases due to repeated acquisition processes
Solution Approach 1:
The patent replaces the continuous image acquisition process with a sound-based detection system. Sound signals can be processed more quickly and do not require the same computational overhead as continuous image capture and processing, thereby reducing the time loss associated with repeated measurements.
3Measurement precision
If a camera is used for user position detection, then measurement precision is improved, but object-generated harmful factors increase due to image leakage security risks
Solution Approach 1:
The patent replaces the camera-based optical system with a microphone-based acoustic system. Sound signals processed for position determination do not contain the same privacy-sensitive information as images, thereby eliminating the security risk of image leakage while maintaining the ability to accurately determine user position.
4Use of energy by moving object
If only a proximity sensor is used to detect user presence, then use of energy is reduced, but measurement precision deteriorates in determining whether user temporarily passes by or remains
Solution Approach 1:
The patent merges the proximity sensor with multiple microphones to create a hybrid detection system. The proximity sensor provides initial user presence detection with low power consumption, while the microphones provide additional acoustic information to distinguish between temporary passage and sustained presence, achieving both energy efficiency and measurement precision.
Solution Approach 2:
The system uses feedback from multiple sensing modalities (proximity sensor and microphones) to continuously refine user position determination. The proximity sensor triggers microphone activation, and the acoustic signals provide feedback to confirm whether the detected object is temporarily passing by or remains in the viewing area, improving measurement precision without proportionally increasing power consumption.
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
Accurately determines user position without cameras, reducing power consumption and image processing load, while preventing image leakage, thus enhancing functionality and price competitiveness.
Implementation Method 1
determine a position of the object corresponding to the user based on signals corresponding to sounds received by the plurality of microphones
Data Source
AI summary
The present disclosure relates to an image display device and a method of operating the same. An image display device according to one embodiment of the present invention includes: a display; a plurality of microphones; a proximity sensor configured to detect an object located in a predetermined area; and a controller, wherein the controller is configured to: in response to an object corresponding to a user being detected by the proximity sensor, determine a position of the object corresponding to the user based on signals corresponding to sounds received by the plurality of microphones; and output content, corresponding to the determined position of the object corresponding to the user, through the display. Various other embodiments are possible.