Viewing Angle Changing Element Fault Detection for Information Leakage Prevention
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Solution Overview
Problem
Existing image display devices that change viewing angles lack measures to prevent information leakage when faults occur, particularly in narrow vision mode, compromising security and reliability, especially in applications like ATMs where security is critical.
Innovation Solution
An image display device equipped with a viewing angle changing element and an operation state detection system that includes a narrow vision forcible setting module, which detects faults and forcibly sets the display to a narrow vision mode using an electric current detection system and a fault judgment module to prevent information leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a viewing angle changing element is added to enable wide vision and narrow vision display switching, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent combines the viewing angle changing element with the display element into an integrated structure where the viewing angle changing element is provided on the front surface of the display element. This merging approach enables wide vision and narrow vision display switching while avoiding the complexity of separate independent systems.
Solution Approach 2:
The viewing angle changing element serves multiple functions: it controls viewing angles (enabling wide vision and narrow vision modes), and when a fault occurs, it can be forcibly set to narrow vision mode to prevent information leakage. This multi-functionality improves adaptability while managing device complexity.
2Reliability
If an operation state detection element and fault judgment module are added to detect faults, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the operation state detection element continuously monitors the viewing angle changing element, and the fault judgment module processes this information to determine if a fault has occurred. This feedback system improves reliability by enabling real-time fault detection without requiring overly complex control systems.
Solution Approach 2:
The system performs self-diagnosis through the operation state detection element that automatically monitors the viewing angle changing element's state. This self-service approach improves reliability while minimizing the need for external monitoring equipment, thereby controlling device complexity.
3Object-affected harmful factors
If a narrow vision forcible setting module is added to forcibly set narrow vision mode when fault occurs, then information security is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary anti-action by pre-configuring the narrow vision forcible setting module to automatically activate when a fault is detected. This preventive measure ensures that even if the viewing angle changing element malfunctions, information leakage is prevented by forcibly switching to narrow vision mode, thereby improving information security while maintaining manageable device complexity.
4Ease of operation
If the viewing angle changing element is electrically controlled to switch between transparent and scattering states, then ease of operation is improved, but reliability worsens due to potential electrical faults
Solution Approach 1:
The patent employs dynamic control by electrically controlling the viewing angle changing element to switch between transparent and scattering states based on operation commands. This dynamic switching improves ease of operation, while the accompanying fault detection and forcible setting mechanisms compensate for potential electrical faults, thereby maintaining reliability.
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 solution effectively detects faults in the viewing angle changing mechanism and instantly switches to a narrow vision mode, preventing information leakage and ensuring security even when faults occur, thereby enhancing the reliability of display devices in public or secure environments.
Implementation Method 1
The variable diffusion cell 111 can change a transparent state and a light scattering state by applying or not applying an electric field
Implementation Method 2
As the cell, a polymer dispersed liquid crystal cell or a polymer stabilized cholesteric structure cell can be used
Data Source
AI summary
Provided is a display device having a viewing angle changing function, which is capable of preventing leakage of information displayed on a display screen even when there is a fault generated in changing the viewing angle. The image display device including a viewing angle changing element capable of changing a wide vision display and a narrow vision display and including a display element is provided with a detection element which detects a fault generated in the viewing angle changing element and a module for changing to a narrow vision display when there is a fault based on a detection value of the detection element. For example, when there is a fault, a transparent heater is operated to heat a liquid crystal layer to set a transparent-scattering changing element to a transparent state and forcibly set the display device to a narrow vision display.