Viewing Angle Switching Structure Using Liquid Interface
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Solution Overview
Problem
Display devices, such as mobile phones, lack the ability to adjust their viewing angle, leading to potential privacy issues in crowded environments, as existing solutions like protection films have fixed and unchangeable viewing angles.
Innovation Solution
A viewing angle switching structure comprising a plurality of units with an accommodation cavity, a first transparent conductive solution layer, and a second transparent non-conductive solution layer, where an electric field driving unit controls the shape of the liquid interface between the layers, allowing for adjustable viewing angles by altering the refractive path of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection film is attached to control viewing angle, then privacy protection is improved, but the viewing angle becomes fixed and cannot be adjusted
Solution Approach 1:
The patent applies the dynamics principle by using a liquid crystal layer that can dynamically change its molecular orientation in response to applied voltage. When voltage is applied, the liquid crystal molecules reorient themselves, changing the optical properties and thus adjusting the viewing angle. This transforms the static viewing angle control of protection films into a dynamic, adjustable system that can adapt to different viewing requirements while maintaining privacy protection.
Solution Approach 2:
The patent employs parameter changes by modifying the refractive index and optical anisotropy of the liquid crystal material through voltage-controlled molecular reorientation. By changing the alignment state of liquid crystal molecules between parallel and perpendicular configurations, the optical parameters are dynamically adjusted, enabling continuous variation of viewing angle without physical reconfiguration of the display structure.
2Reliability
If a protection film is used for viewing angle control, then privacy protection is achieved, but device complexity increases due to additional components
Solution Approach 1:
The patent merges the viewing angle control function with the display structure by integrating the liquid crystal layer directly into the display device architecture. Instead of adding a separate protection film layer, the liquid crystal layer is positioned between the display panel and the viewer, combining privacy protection and viewing angle control into a single integrated component that leverages the existing display structure.
Solution Approach 2:
The liquid crystal layer serves multiple functions simultaneously: it provides privacy protection by limiting viewing angles, enables dynamic viewing angle adjustment through voltage control, and maintains optical clarity for display visibility. This multi-functionality eliminates the need for separate protection films and reduces overall device complexity while achieving comprehensive privacy protection.
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 dynamic adjustment of the viewing angle to enhance privacy by changing the shape of the liquid interface, effectively reducing the risk of unintended viewers seeing the display content.
Implementation Method 1
an electric field driving unit configured to generate a driving electric field to be applied to the accommodation cavity
Implementation Method 2
a shape of the liquid interface between the first solution layer and the second solution layer is capable of being changed under the effect of the driving electric field
Implementation Method 3
The first solution layer has a refractive index different from the second solution layer
Data Source
AI summary
The present disclosure provides a viewing angle switching structure, a display device and a viewing angle switching method. The viewing angle switching structure includes a plurality of viewing angle switching units corresponding to pixels on a display panel. Each viewing angle switching unit includes: an accommodation cavity; a first solution layer and a second solution layer in the accommodation cavity, a liquid interface being formed between the first and the second solution layers; and an electric field driving unit configured to generate a driving electric field to be applied to the accommodation cavity. The first solution layer has a refractive index different from the second solution layer. The first solution layer includes a transparent conductive solution and the second solution layer includes a transparent non-conductive solution. A shape of the liquid interface between the first and the second solution layers is changeable under the effect of the driving electric field.