Viewing Angle Adjusting Member Using Nanoparticle Electrophoresis
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Solution Overview
Problem
Portable electronic devices face challenges in securely restricting the viewing angle of their displays, as existing solutions like screens or partitions are not practical for mobile use, limiting both security and usability when multiple users need to view content simultaneously.
Innovation Solution
A viewing angle adjusting member comprising transparent films with electrode layers and nanoparticles that can be moved by electrical signals to block or transmit light, allowing for adjustable viewing angles by forming slits in a transparent resin, enabling secure narrow angles or wider views as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screen or partition is installed around the display to restrict viewing angle, then security is improved, but device complexity and portability are worsened
Solution Approach 1:
The patent extracts the viewing angle control function from the display hardware itself and implements it through a separate controllable layer (electronic ink layer with nanoparticles). This allows the display to maintain its original simple structure while adding security functionality through an independent controllable component that can be adjusted via software control.
Solution Approach 2:
The patent implements a dynamic viewing angle control system where the electronic ink layer can change its light transmission properties in real-time based on control signals. The nanoparticles can move between aggregated and dispersed states, dynamically adjusting the viewing angle from narrow (secure) to wide (shared) modes, making the security feature adaptable to different usage scenarios.
2Reliability
If a fixed viewing angle structure is used to ensure security, then security is improved, but adaptability to different usage scenarios is worsened
Solution Approach 1:
The patent implements a dynamic viewing angle control system where the electronic ink layer can change its light transmission properties in real-time based on control signals. The nanoparticles can move between aggregated and dispersed states, dynamically adjusting the viewing angle from narrow (secure) to wide (shared) modes, making the security feature adaptable to different usage scenarios.
Solution Approach 2:
The patent changes the physical state and distribution parameters of the nanoparticles in the electronic ink layer to control viewing angle. By adjusting parameters such as nanoparticle aggregation level, dispersion state, and layer opacity through electrical signals, the system can switch between different viewing angle modes to suit various usage requirements.
3Manufacturing precision
If nanoparticles are used to block light, then viewing angle control is improved, but manufacturing complexity is worsened
Solution Approach 1:
The patent merges the electronic ink layer with the existing display structure, integrating the nanoparticle-containing layer between the display and the viewer. This combination approach allows the nanoparticle layer to function as part of the display assembly without requiring completely separate manufacturing processes, simplifying production while maintaining precise viewing angle control.
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 secure narrow viewing angles when required and wider angles when necessary, enhancing the usability and security of portable electronic devices by dynamically controlling light transmission based on the incident angle, thus improving both security and user experience.
Implementation Method 1
the blocking material may include an electronic ink comprising a mixture of a solvent, a dispersing agent, and the nanoparticles, and wherein the nanoparticles are charged in an electric field and moved to block light
Implementation Method 2
the viewing angle adjusting member is configured to selectively transmit light incident on one surface of the viewing angle adjusting member according to an incident angle of the incident light by adjusting a height of the nanoparticles
Data Source
AI summary
A viewing angle adjusting member and an electronic device including the same are provided. The viewing angle adjusting member includes a first transparent film including a first transparent electrode layer, a second transparent film including a second transparent electrode layer, and a blocking material provided between the first transparent film and the second transparent film and containing nanoparticles configured to block light. The viewing angle adjusting member may be configured to adjust a position of the nanoparticles according to an electrical signal applied to at least one of the first transparent electrode layer and the second transparent electrode layer.