Dynamic Privacy Filter for Screens Based on Face Position Detection
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Solution Overview
Problem
Existing privacy filters for electronic devices do not effectively protect confidential information from unauthorized viewers, particularly from behind the user or through keyboard input, and increase power consumption or device complexity.
Innovation Solution
A method and device that use image sensors to detect human faces and estimate their positions relative to the device, enabling privacy protection functions such as activating a privacy filter or alerting the user when unauthorized individuals are detected, without significantly increasing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a privacy filter is applied to reduce the field of view of the screen, then confidential information is protected from unauthorized viewing, but the brightness and colors of the displayed images are degraded
Solution Approach 1:
The patent implements dynamic control of privacy protection by detecting the presence and position of other users on the screen. The system adjusts between full privacy mode (when no one is nearby), partial privacy mode (when someone is nearby), and no privacy mode (when multiple people are sharing the screen), allowing the screen to maintain optimal brightness and color while providing privacy protection only when needed.
2Illumination intensity
If the brightness of the screen is increased to offset the negative effect of the privacy filter, then the display quality is improved, but the current consumption of the screen increases
Solution Approach 1:
The system periodically detects the presence of other users using camera and image processing algorithms. Based on these periodic detections, the privacy protection level is adjusted dynamically, allowing the screen to operate at normal brightness levels during most times when no unauthorized viewing is occurring, thus avoiding continuous high power consumption while maintaining display quality.
3Reliability
If an electronic filter is enabled to limit the field of view of displayed images, then privacy protection is provided, but the apparatus resources are consumed and the user interface becomes more complex
Solution Approach 1:
The system automatically detects the presence and position of other users using onboard camera sensors and image processing algorithms. It autonomously determines the appropriate privacy protection level and adjusts screen content visibility accordingly, eliminating the need for manual user intervention or complex control interfaces while providing adaptive privacy protection.
4Reliability
If privacy protection measures are continuously active to protect confidential information, then security is maintained, but power consumption increases significantly
Solution Approach 1:
The system uses periodic detection cycles to monitor for the presence of other users rather than maintaining continuous privacy protection. The camera captures images at intervals, processes them to detect faces and determine positions, and adjusts privacy settings based on these periodic assessments, significantly reducing power consumption compared to continuous monitoring while maintaining security when needed.
Data Source
AI summary
A method for controlling an electronic apparatus, includes steps of: acquiring an image of the environment of the apparatus, detecting the presence of human faces in the image acquired, estimating a respective position of each face detected in relation to the apparatus, and sending a signal to the apparatus to enable a function of the apparatus if a condition is met relating to a number of faces detected in the image and/or the estimated position of each detected face.