Viewing Angle Switch Module for Display Anti-Peep and Energy Efficiency
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Solution Overview
Problem
Current display apparatuses face challenges in conveniently switching between anti-peep and sharing modes while maintaining effective anti-peep protection and efficient energy usage, particularly due to the manual handling of light control films and suboptimal light energy utilization.
Innovation Solution
A display apparatus incorporating a viewing angle switch module with a viewing angle limiter and two electronically controlled viewing angle switches, along with polarizers, which adjusts light absorption and polarization to enhance anti-peep effects and energy efficiency by optimizing light energy utilization and mode switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light control film is placed in front of the display panel to achieve anti-peep effect, then anti-peep protection is improved, but operation convenience deteriorates due to manual handling requirements
Solution Approach 1:
The patent replaces the manual mechanical handling of light control films with an electronically controlled liquid crystal viewing angle switch. The liquid crystal layer, when voltage is applied, changes its optical properties to control light transmission angles, eliminating the need for physical film manipulation while achieving the same anti-peep effect. This substitution of mechanical operation with electronic control resolves the contradiction between anti-peep protection and operation convenience.
2Device complexity
If manual light control film handling is used for mode switching, then device complexity is reduced, but productivity deteriorates due to time-consuming operations
Solution Approach 1:
The patent replaces slow manual film handling with fast electronic control of liquid crystal molecules. By applying voltage to the liquid crystal layer, the viewing angle switches instantly between wide and narrow modes, achieving rapid mode switching without the time-consuming manual operations of removing or repositioning physical films. This electronic control mechanism resolves the contradiction between device complexity and switching speed.
3Device complexity
If conventional viewing angle switching structures are used, then device complexity is maintained, but energy consumption increases due to suboptimal light energy utilization
Solution Approach 1:
The patent optimizes light energy utilization by precisely controlling the liquid crystal layer's optical parameters through voltage application. The liquid crystal molecules change their orientation and light transmission properties in response to electrical signals, enabling efficient control of viewing angles with minimal energy input. This parameter-based control resolves the contradiction between device complexity and energy consumption by achieving effective viewing angle switching through optimized optical parameter modulation rather than energy-intensive mechanical or optical components.
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 allows for convenient switching between anti-peep and sharing modes with improved anti-peep protection and reduced energy consumption by optimizing light energy utilization through the viewing angle limiter and electronically controlled switches.
Implementation Method 1
The first liquid crystal layer is sandwiched between the first alignment layer and the second alignment layer. A first alignment direction of the first alignment layer is parallel or perpendicular to a second alignment direction of the second alignment layer.
Implementation Method 2
An axial direction of a first absorption axis of the first polarizer is parallel to an axial direction of a second absorption axis of the second polarizer.
Implementation Method 3
The first polarizer is disposed between the first electronically controlled viewing angle switch and the second electronically controlled viewing angle switch.
Data Source
AI summary
A viewing angle switch module includes a viewing angle limiter, a first electronically controlled viewing angle switch, a second electronically controlled viewing angle switch, a first polarizer, and a second polarizer. The viewing angle limiter has an absorption axis, and an axial direction of the absorption axis is parallel to a thickness direction of the viewing angle limiter. The viewing angle limiter, the first electronically controlled viewing angle switch, the first polarizer, the second electronically controlled viewing angle switch, and the second polarizer are overlapped. An axial direction of a first absorption axis of the first polarizer is parallel to an axial direction of a second absorption axis of the second polarizer. A display apparatus adopting the viewing angle switch module is also provided. The viewing angle switch module and the display apparatus provided by the invention have better light energy utilization rate.