Peep-proof Device Light Beam Adjustment Layer Privacy
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Solution Overview
Problem
Conventional portable display devices lack privacy protection due to their wide viewing angles, allowing others to easily view the displayed content in public settings.
Innovation Solution
A peep-proof device incorporating a light beam adjustment layer with a transparent base layer and a liquid crystal layer, featuring curved surface structures that refract light differently based on viewing angle, ensuring clear visibility only from the front while scattering light at lateral angles, thereby preventing unauthorized viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional display device with wide viewing angle is used, then the visibility and accessibility of the display content is improved, but the privacy protection capability deteriorates
Solution Approach 1:
The patent applies a liquid crystal layer that can dynamically change its optical properties between different states. When voltage is applied, the liquid crystal molecules reorient, switching the display between a visible state (for authorized users) and a hidden state (privacy protection), allowing the system to adapt its transparency based on operational requirements
Solution Approach 2:
The patent utilizes changes in the refractive index of the liquid crystal material as a control parameter. By adjusting the orientation of liquid crystal molecules through applied voltage, the refractive index changes, which directly controls the light transmission properties and enables switching between visible and invisible states for privacy protection
2Object-affected harmful factors
If a peep-proof structure with curved surface grooves is added, then the privacy protection capability is improved, but the device complexity increases
Solution Approach 1:
The patent introduces curved surface grooves only in specific local regions where privacy protection is needed, rather than modifying the entire display structure. This localized approach adds privacy functionality to critical areas while maintaining the simplicity of the overall device structure
Solution Approach 2:
The patent combines multiple materials with different optical properties - the transparent base layer, the liquid crystal layer, and the curved groove structures - to create a composite optical system. This composite structure achieves privacy protection through the synergistic interaction of different material properties rather than requiring a completely new complex design
3Object-affected harmful factors
If multiple light beam adjustment layers with different structural parameters are laminated, then the peep-proof effect is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The patent divides the privacy protection function into multiple independent light beam adjustment layers, each with specific groove structures. This segmentation allows each layer to be manufactured separately using standardized processes, and then laminated together, simplifying the overall manufacturing compared to creating a single complex structure
Solution Approach 2:
The patent employs a laminated structure where multiple light beam adjustment layers are stacked one on another, similar to nested dolls. Each layer contains grooves with different structural parameters that work together to enhance the peep-proof effect, while the modular nested design facilitates standardized manufacturing and assembly
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 peep-proof device effectively maintains user privacy by allowing only frontal viewers to see the display content clearly while rendering it blurry or invisible to those at lateral angles, enhancing privacy protection without causing light loss.
Implementation Method 1
A refractive index of the transparent base layer is same as a refractive index of the liquid crystal layer to ordinary light beam
Implementation Method 2
scattering light at lateral angles, thereby preventing unauthorized viewing
Implementation Method 3
featuring curved surface structures that refract light differently based on viewing angle
Data Source
AI summary
A peep-proof device, a display device and a method for driving the display device are provided. The peep-proof device includes at least one light beam adjustment layer. The light beam adjustment layer includes: a transparent base layer and a plurality of grooves formed in a surface of the transparent base layer; and a liquid crystal layer arranged within the plurality of grooves. A refractive index of the transparent base layer is same as a refractive index of the liquid crystal layer to ordinary light beam.