Piezo-Driven Light Source Positioning for Display Privacy
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Solution Overview
Problem
Existing display technologies face limitations in simultaneously providing privacy and sharing modes, especially in low light environments, as they require high energy for white background privacy displays and are restricted to bright settings, making it difficult to manage sensitive and non-sensitive information effectively.
Innovation Solution
The use of piezo material devices to alter the distance between light sources and an aperture layer, allowing for selective adjustment of light quantity and angle, enabling simultaneous generation of privacy and sharing mode portions on a light source or pixel basis, thereby identifying sensitive information for privacy and non-sensitive information for sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If white background privacy display is used, then privacy protection is improved, but energy consumption increases significantly
Solution Approach 1:
The display is divided into multiple light source regions, each independently controllable for privacy or sharing mode. This segmentation allows selective activation of privacy features only where needed, reducing overall energy consumption compared to activating the entire display in privacy mode.
Solution Approach 2:
Different regions of the display can have different light source distances from the aperture layer, creating local privacy zones rather than requiring the entire display to operate in high-energy privacy mode. This localized approach maintains privacy protection where needed while conserving energy in other areas.
2Reliability
If light source distance from aperture layer is increased, then privacy mode performance is improved, but light quantity decreases
Solution Approach 1:
The light source distance from the aperture layer is made dynamically adjustable rather than fixed. This allows the system to optimize the balance between privacy performance and light quantity by adjusting the distance based on viewing conditions, content sensitivity, and environmental lighting.
Solution Approach 2:
The physical parameter of light source distance is changed to control privacy performance. By adjusting this parameter, the system can achieve different privacy levels while managing light output, rather than relying solely on optical filters or other fixed mechanisms.
3Adaptability or versatility
If multiple display modes are supported, then adaptability is improved, but device complexity increases
Solution Approach 1:
The display controller is segmented to independently manage different light source regions, allowing each region to operate in different modes simultaneously. This modular control approach enables multiple display modes without requiring a completely complex centralized control system.
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
This solution allows for flexible management of light sources to create privacy zones and sharing zones within a display, effectively protecting sensitive information while allowing public information to be shared, even in low light environments without the need for high energy consumption.
Implementation Method 1
a piezo material device can be utilized to alter a position of a particular light source
Data Source
AI summary
A display device includes an aperture layer, a first plurality of light sources, a second plurality of light sources, and a piezo material coupled to the first plurality of light sources and the second plurality of light sources. The aperture layer includes a first plurality of apertures and a second plurality of apertures, and the first plurality of light sources is arranged to correspond to the first plurality of apertures, and the second plurality of light sources is arranged to correspond to the second plurality of apertures. The piezo material is configured to alter a first position of the first plurality of light sources relative to the first plurality of apertures, and to alter a second position of the second plurality of light sources relative to the second plurality of apertures.