Display Security via Perpendicular Polarizer Segmentation
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Solution Overview
Problem
Liquid crystal display devices have narrow viewing angles, allowing information leakage as users or peepers can view displayed information from certain angles, compromising privacy in devices like ATMs, mobile phones, and laptops.
Innovation Solution
A display system with a user-side auxiliary viewing module featuring a second polarizer with a polarization axis perpendicular to the device-side polarizer, ensuring that only authorized users can view the information by providing the polarized spectacle upon verification, preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a narrow viewing angle is used in liquid crystal display devices, then privacy protection is improved, but information leakage from specific angles cannot be prevented
Solution Approach 1:
The patent divides the viewing system into two independent parts: a device-side display module with a first polarizer and a user-side auxiliary viewing module with a second polarizer. The second polarizer is provided only to verified users, segmenting the security function between the device and the authorized user, thereby preventing information leakage from specific angles while maintaining privacy protection.
Solution Approach 2:
The second polarizer acts as an intermediary element that mediates between the display and the user's eye. It is provided only to verified users through a verification module, serving as a conditional mediator that allows authorized viewing while blocking unauthorized access from peepers at any angle.
2Reliability
If a verification module is added to provide user-side auxiliary viewing module, then information security is improved, but device complexity increases
Solution Approach 1:
The patent extracts the critical security function (the second polarizer) from the main display system and places it in a separate user-side auxiliary viewing module. This extracted component is only provided to verified users, separating the security verification function from the display function and reducing the complexity of the main device while enhancing security.
Solution Approach 2:
The verification module operates autonomously to determine whether to provide the user-side auxiliary viewing module to the user. Once verification is complete, the system automatically provides or withholds the security component without requiring continuous manual intervention, reducing operational complexity while maintaining high security.
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
Enhances information security by preventing peepers from viewing the displayed content, ensuring that only valid users can access the information, thereby improving privacy and security in electronic devices.
Implementation Method 1
a first polarizer adhered onto a surface of the array substrate away from the liquid crystal layer, wherein the user-side auxiliary viewing module is provided with a second polarizer, and the second polarizer has a polarization axis in a direction substantially perpendicular to a polarization axis of the first polarizer
Data Source
AI summary
The present disclosure provides a display system which includes an electronic device and a user-side auxiliary viewing module. The electronic device may include a device-side display module, which includes an array substrate, a color filter substrate, a liquid crystal layer arranged between the array substrate and the color filter substrate, and a first polarizer adhered onto a surface of the array substrate away from the liquid crystal layer. A second polarizer may be arranged on the user-side auxiliary viewing module, and have a polarization axis in a direction substantially perpendicular to a polarization axis of the first polarizer.