Viewing Angle Switch Module for Display Anti-Peep
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Solution Overview
Problem
Current display devices with wide viewing angles pose a risk of information leakage, as they can be easily viewed by others, and existing light control films lack operational convenience for switching between viewing modes.
Innovation Solution
A viewing angle switch module incorporating a viewing angle limiting device with block walls and an electrically controlled viewing angle switch device, featuring a liquid crystal layer and polarizers, allows for enhanced filtering effects and convenient mode switching between anti-peep and sharing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light control film is placed in front of a display panel to filter out large-angle image beams, then the anti-peep effect is improved, but the operational convenience deteriorates due to manual removal requirement
Solution Approach 1:
The patent replaces the mechanical manual removal system with an electrically controlled liquid crystal switching system. The liquid crystal layer changes its optical properties in response to electrical signals, automatically switching between anti-peep and wide viewing angle modes without requiring manual intervention to remove or reposition the light control film.
Solution Approach 2:
The patent introduces dynamic switching capability through electrically controlled liquid crystal devices that can change their optical state in real-time. The viewing angle control is no longer static but can be dynamically adjusted between different modes (anti-peep and wide viewing angle) based on operational requirements, enhancing both functionality and convenience.
2Object-affected harmful factors
If a light control film is used to achieve anti-peep effect, then the large-angle image beam filtering is improved, but the device complexity increases due to additional components
Solution Approach 1:
The patent integrates multiple functions into the liquid crystal switching device. The same liquid crystal layer and control system serve both as the viewing angle control mechanism and as the anti-peep mechanism, eliminating the need for separate light control films and reducing overall device complexity while maintaining effective large-angle beam filtering.
Solution Approach 2:
The patent merges the anti-peep function with the viewing angle control function into a single integrated liquid crystal switching system. By combining these functions, the patent reduces the number of separate components needed, simplifying the overall device structure while achieving effective large-angle image beam filtering.
3Adaptability or versatility
If the viewing angle is made wide for multiple viewers, then the adaptability is improved, but the information security deteriorates due to potential leakage
Solution Approach 1:
The patent implements dynamic control over the viewing angle through electrically switched liquid crystal devices. The display can adaptively change its viewing characteristics in real-time, switching between wide viewing angle mode for multiple viewers and restricted viewing angle mode for information security, thereby resolving the contradiction between adaptability and information security.
Solution Approach 2:
The patent changes the optical parameters of the liquid crystal layer through electrical control. By adjusting the liquid crystal's molecular orientation and optical properties in response to electrical signals, the patent can dynamically alter the viewing angle and light transmission characteristics, enabling the display to adapt between wide viewing and secure viewing modes as needed.
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 provides a favorable large viewing angle filtering effect and excellent anti-peep performance, enabling convenient switching between modes while improving the display apparatus's anti-peep capabilities.
Implementation Method 1
The first electrically controlled viewing angle switch device includes a first liquid crystal layer, a first polarizer and a second polarizer
Implementation Method 2
The first polarizer and the second polarizer are respectively located at two opposite sides of the first liquid crystal layer, and an absorption axis of the first polarizer and an absorption axis of the second polarizer are parallel or perpendicular to the first direction
Data Source
AI summary
A viewing angle switch module including a viewing angle limiting device and a first electrically controlled viewing angle switch device is provided. A plurality of first block walls of the viewing angle limiting device are arranged along a first direction and extended in a second direction. The first electrically controlled viewing angle switch device has a first liquid crystal layer, a first polarizer and a second polarizer. An angle of 90±20 degrees is included between an optical axis of the first liquid crystal layer and the first direction. The first polarizer and the second polarizer are respectively located at two opposite sides of the first liquid crystal layer. An absorption axis of the first polarizer and a, absorption axis of the second polarizer are parallel to or perpendicular to the first direction. A display apparatus adopting the viewing angle switch module is also provided.