Privacy Display Using Segmented Light Beams for Dual View Zones
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Solution Overview
Problem
Existing display technologies struggle to provide both privacy and the ability to display static or dynamic images to different view zones without overlapping or compromising the privacy mode.
Innovation Solution
A static-image augmented privacy display system that uses a privacy backlight and a static display layer to provide directional light beams for a private image and static image, respectively, while ensuring these images are only visible in mutually exclusive view zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a privacy display uses directional light beams to provide a private image to a specific view zone, then privacy is improved, but the ability to display additional static information to other view zones is compromised
Solution Approach 1:
The display system is segmented into multiple independent light beam generation paths: a first plurality of directional light beams for the private image in the first view zone, and a second plurality of directional light beams for the static image in the second view zone. This segmentation allows each beam set to independently serve its designated function without interfering with the other, resolving the contradiction between privacy protection and multi-zone display capability
Solution Approach 2:
Different regions of the display system are assigned different functional qualities: the first directional light beams are optimized for privacy protection with specific angular distribution to the first view zone, while the second directional light beams are optimized for static information display to the second view zone. Each region maintains its specialized function, allowing both privacy and additional information display to coexist
2Productivity
If a display system provides both private image and static image to different view zones simultaneously, then information delivery is improved, but image overlap and privacy compromise occur
Solution Approach 1:
The static image display function is extracted as a separate beam path from the private image system. The second plurality of directional light beams carries only the static image to the second view zone, while the first plurality of directional light beams carries only the private image to the first view zone. This extraction prevents image overlap and maintains privacy security while achieving efficient information delivery to multiple zones
Solution Approach 2:
The system uses separate optical paths as intermediaries between the light source and the two different view zones. Each beam plurality acts as an independent intermediary channel that directs information to its designated zone without allowing cross-contamination or overlap, thus maintaining both privacy security and information delivery efficiency
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
The system effectively provides a private image to one view zone and a static image to another, ensuring exclusive visibility and maintaining privacy without overlapping the images.
Implementation Method 1
the light guide is configured to guide light as guided light
Implementation Method 2
the directional scattering feature is configured to scatter the guided light out of the light guide as directional emitted light
Data Source
Figure 1A~1B
Figure 2~3A
Figure 3B~4A
AI summary
A static-image augmented privacy display, mode-switchable privacy display system, and method provide a private image to a first view zone and a static image to a second view zone. The static-image augmented privacy display includes a privacy backlight configured to provide directional emitted light to the first view zone and an array of light valves configured to modulate the directional emitted light to provide a private image within the first view zone. The static-image augmented privacy display also includes a static display layer configured to provide a static image in a second view zone. The mode-switchable privacy display includes a broad-angle backlight configured to provide broad-angle emitted light to both a first view zone and a second view zone during a shared mode, a shared image being provided by modulation of the broad-angle emitted light using the light valve array.