Zone-Based Display Brightness Control for Privacy
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Solution Overview
Problem
Information handling systems face challenges in providing privacy by controlling the visibility of content displayed, particularly in reducing legibility for observers outside the intended field of view without compromising the user's experience within the view.
Innovation Solution
An information handling system utilizing a camera to determine the presence of individuals within its field of view and adjusting the brightness levels of LED pixels, specifically using an OLED panel with zone-based control, to reduce visibility for those outside the field of view while maintaining legibility for the user within the view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the brightness of all LED pixels is reduced to prevent viewing from outside the field of view, then privacy is improved, but the legibility for the user within the field of view deteriorates
Solution Approach 1:
The display is divided into multiple zones (first zone, second zone, third zone) corresponding to different viewing angles and observer positions. Each zone can be independently controlled with different brightness levels, allowing the system to dim areas visible to outsiders while maintaining full brightness in the user's field of view.
Solution Approach 2:
Different regions of the display are assigned different brightness characteristics based on their viewing geometry. The central zone (first zone) maintains higher brightness for user readability, while peripheral zones (second and third zones) are dimmed to reduce visibility from outside the intended field of view.
2Object-affected harmful factors
If the brightness levels are adjusted dynamically based on observer position, then privacy is enhanced, but the device complexity increases
Solution Approach 1:
The system dynamically adjusts brightness levels of different display zones based on real-time detection of observer position using a camera. The brightness control transitions from static to dynamic, automatically adapting to changing viewing conditions and observer locations.
Solution Approach 2:
The system uses camera-based observer detection to provide feedback about viewer position, which then triggers automatic brightness adjustment. This closed-loop feedback mechanism enables adaptive privacy control without requiring manual user intervention.
3Object-affected harmful factors
If zone-based brightness control is implemented, then privacy for multiple observers is improved, but the energy consumption increases
Solution Approach 1:
Different zones of the display are assigned different brightness levels appropriate to their viewing geometry. Zones visible to multiple observers are dimmed to appropriate levels, while the user's primary viewing zone maintains full brightness, optimizing energy usage based on local viewing requirements.
Solution Approach 2:
Instead of uniformly dimming the entire display, only specific zones that are visible to unauthorized observers are dimmed. This partial action approach reduces energy consumption compared to full display dimming while still achieving the privacy objective.
Data Source
AI summary
In one or more embodiments, one or more systems, one or more methods, and/or one or more processes may acquire, via a camera associated with an information handling system (IHS), a first digital image; determine, from the first digital image, that a person is within a field of view of a display associated with the IHS; determine a first brightness level of first multiple light emitting diode (LED) pixels associated with a central zone associated with the display; set a brightness level of the first multiple LED pixels to the first brightness level; determine, based at least on the first brightness level, multiple second brightness levels for respective multiple zones associated with the display outside the central zone; and for each zone of the multiple zones, set a brightness level of LED pixels associated with the zone to a respective one of the multiple second brightness levels for the zone.