Dual Liquid Crystal Peep-Proof Display with Switchable Viewing Angles
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Solution Overview
Problem
Conventional anti-peeping privacy apparatuses are limited to a single viewing mode and cannot be switched between privacy and non-privacy modes, making them inconvenient for sharing screens with others.
Innovation Solution
A peep-proof apparatus using two liquid crystal layers with controllers to switch between light transmissive and light blocking regions, allowing a display panel to change viewing angles between a privacy mode with a smaller viewing angle and a non-privacy mode with a larger viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional privacy filter is used to provide privacy protection, then the viewing angle is limited to a smaller range, but the display cannot be shared with others and lacks versatility
Solution Approach 1:
The patent applies the dynamics principle by implementing a privacy filter with adjustable viewing angles. The filter includes a first liquid crystal layer and a second liquid crystal layer that can be independently controlled to change the viewing angle dynamically. This allows the display to switch between a first viewing angle for privacy protection and a second viewing angle for sharing, making the system adaptable to different usage scenarios rather than being fixed in a single state.
Solution Approach 2:
The patent employs parameter changes by modifying the physical state of liquid crystal layers through electrical control. By applying different voltages to the first and second liquid crystal layers, the viewing angle parameter can be changed between a first viewing angle (narrower, for privacy) and a second viewing angle (wider, for sharing). This enables the privacy filter to adapt its optical properties based on the desired functionality.
2Adaptability or versatility
If the viewing angle is increased to allow sharing the display, then privacy protection is reduced, but the ability to access private information securely is compromised
Solution Approach 1:
The patent resolves this contradiction by making the privacy filter dynamic rather than static. The first liquid crystal layer and second liquid crystal layer can be controlled independently to switch between different viewing angle states. When screen sharing is needed, the filter transitions to a second viewing angle that allows wider viewing. When privacy is prioritized, it returns to the first viewing angle, ensuring that privacy protection and screen sharing capability can coexist by being available on demand.
Solution Approach 2:
The patent applies universality by designing a privacy filter that performs multiple functions: it provides privacy protection at a first viewing angle and enables screen sharing at a second viewing angle. The dual liquid crystal layer structure allows the same filter to serve both privacy-protective and sharing-oriented purposes, making it a multi-functional component that adapts to different user needs without requiring separate filters for each function.
3Ease of manufacture
If a fixed privacy filter structure is used, then manufacturing is simpler, but the device cannot switch between different viewing modes reducing operational flexibility
Solution Approach 1:
The patent implements dynamics by transitioning from a fixed privacy filter structure to a dynamic one using liquid crystal layers. The first liquid crystal layer and second liquid crystal layer can be controlled independently through electrode structures to change the viewing angle. This dynamic capability allows the filter to switch between a first viewing angle and a second viewing angle, providing operational flexibility while maintaining a relatively straightforward layered structure that builds upon conventional filter designs.
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
Enables convenient switching between privacy and non-privacy modes, providing enhanced privacy protection while allowing for wider viewing angles when necessary, thus addressing the limitations of conventional privacy filters.
Implementation Method 1
a first liquid crystal layer on a base substrate; a second liquid crystal layer on a side of the first liquid crystal layer distal to the base substrate
Implementation Method 2
a first controller configured to control the first liquid crystal layer to switch between being light transmissive and being light blocking in a plurality of first regions spaced apart from each other while other regions in the first liquid crystal layer being light transmissive
Data Source
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AI summary
A peep-proof apparatus for switching a viewing angle of a display panel between a first viewing angle and a second viewing angle. The peep-proof apparatus includes a base substrate (61); a first liquid crystal layer (10) on the base substrate (61); a second liquid crystal layer (20) on a side of the first liquid crystal layer (10) distal to the base substrate (61); a first controller configured to control the first liquid crystal layer (10) to switch between being light transmissive and being light blocking in a plurality of first regions (R1) spaced apart from each other while other regions in the first liquid crystal layer (10) being light transmissive; and a second controller configured to control the second liquid crystal layer (20) to switch between being light transmissive and being light blocking in a plurality of second regions (R2) spaced apart from each other while other regions in the second liquid crystal layer (20) being light transmissive.