Dynamic Anti-Peeping Assembly for Display Devices
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Solution Overview
Problem
Existing anti-peeping assemblies for display devices are inflexible and cannot adapt to different application occasions, as they either prevent side viewing or allow it, limiting their usability in scenarios requiring secrecy or sharing.
Innovation Solution
An anti-peeping assembly comprising a liquid crystal layer between two substrates, where electrodes on the substrates control the scattering or transmission of light by applying specific voltages, allowing dynamic adjustment of the viewing angle to suit different application needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an anti-peeping film is adhered to the light-emergent surface to prevent side viewing, then privacy protection is improved, but the display device loses the ability to share information in public occasions
Solution Approach 1:
The patent applies a liquid crystal layer that can dynamically change its optical properties based on applied voltage. In the first state (no voltage or specific voltage applied), the liquid crystal layer scatters light to provide anti-peeping protection. In the second state (different voltage applied), the liquid crystal layer allows light transmission for information sharing. This dynamic state change enables the display device to adapt to different application occasions, resolving the contradiction between privacy protection and adaptability.
2Ease of manufacture
If a fixed anti-peeping structure is used, then manufacturing simplicity is maintained, but the device cannot switch between privacy mode and sharing mode
Solution Approach 1:
The patent changes the optical parameter of the anti-peeping assembly by applying different voltages to the liquid crystal layer. The liquid crystal layer transitions between scattered light state and transmitted light state based on voltage parameters, enabling mode switching without changing the physical structure. This approach maintains manufacturing simplicity while achieving multi-mode functionality.
3Object-affected harmful factors
If light is scattered in all directions by the anti-peeping layer, then side viewing is blocked, but front viewing clarity is reduced
Solution Approach 1:
The patent uses periodic control of the liquid crystal layer state through voltage application. When voltage is applied to switch to anti-peeping mode, the liquid crystal layer scatters light to block side viewing. When voltage is removed or adjusted to switch to viewing mode, the liquid crystal layer aligns to allow clear front viewing. This periodic state switching enables the system to achieve both side viewing blockage and front viewing clarity at different times based on application needs.
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 the display device to transition between narrow and wide viewing angles, ensuring privacy in secrecy-demanding situations while allowing information sharing in sharing-demanding situations, thereby enhancing flexibility and usability.
Implementation Method 1
a liquid crystal layer located between the first substrate and the second substrate; wherein, in response to applying a same voltage to the first electrode and any second electrode of the plurality of second electrodes, the liquid crystals between the first electrode and the any second electrode scatter light, and in response to applying different voltages to the first electrode and the any second electrode, the liquid crystals between the first electrode and the any second electrode transmit light
Data Source
AI summary
An anti-peeping assembly and a manufacturing method thereof, a method for controlling an anti-peeping assembly and a display device are described. The anti-peeping assembly includes a first substrate and a second substrate arranged facing each other, and a liquid crystal layer located between said first substrate and said second substrate; wherein, a first electrode is disposed on said first substrate at a side near the liquid crystal layer, and a plurality of second electrodes arranged as an array are disposed on said second substrate at a side near the liquid crystal layer; and wherein, in response to applying a same voltage to said first electrode and any second electrode, liquid crystals between said first electrode and said any second electrode scatter light, and in response to applying different voltages to said first electrode and said any second electrode, liquid crystals between them transmit light.