Camera Polarizer for Display Reflection Management
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Solution Overview
Problem
High-quality cameras in information handling systems capture reflections of display images on eyeglasses or other surfaces, causing distractions and security risks, especially in low light environments.
Innovation Solution
A camera system with a polarizer that adjusts its polarization orientation to cancel display reflections by analyzing captured images and activating liquid crystals to filter light normal to the reflections' polarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-quality camera with improved optics is used to capture video in low light situations, then video quality is improved, but reflections of display images are captured causing distractions and security risks
Solution Approach 1:
A polarizer is introduced as an intermediary component in the camera system to filter polarized light from display reflections. The polarizer selectively blocks reflected light while allowing other light to pass through, thereby eliminating the harmful reflection effect without compromising the camera's ability to capture high-quality video in low light conditions
Solution Approach 2:
The system dynamically adjusts the polarization angle of the polarizer based on detected reflection conditions. By changing the orientation parameter of the polarizer, the system optimizes reflection cancellation while maintaining video quality, adapting to different viewing angles and lighting conditions
2Object-affected harmful factors
If polarizer is activated to cancel reflections, then reflections are reduced, but light transmission is blocked reducing image brightness
Solution Approach 1:
The polarizer is implemented as a dynamic component that can be rotated or adjusted in real-time. The system continuously monitors for reflections and adjusts the polarizer's angle to cancel reflections only when needed, while maintaining optimal light transmission during normal operation. This dynamic adjustment allows the system to adapt between reflection cancellation and brightness preservation modes
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
Reduces or eliminates reflections on eyeglasses, ensuring clearer videoconferencing images and improved security by making the end user's eyes visible, reducing distractions and potential security breaches.
Implementation Method 1
a polarizer is activated to filter the reflections by polarizing light normal to the reflections polarization
Implementation Method 2
such as by activating liquid crystals to have the normal orientation polarization
Data Source
AI summary
An information handling system camera selectively activates a polarizer to polarize captured visible images so that display panel reflections are canceled from the captured visual images. The camera polarizer may be configured to polarize at an angle normal to polarized illumination from the display panel, such as when the camera integrates in a common housing with the display panel. Alternatively, the orientation of the camera retarder may rotate to find an optical orientation for cancellation of display visual image reflections.