Viewing Angle Switch Device Spacer Light-Shielding Geometry
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Solution Overview
Problem
Existing display technologies with wide viewing angles can lead to confidential information leakage due to light leakage near spacers in electrically controllable liquid crystal cells, affecting display quality and anti-peep effectiveness.
Innovation Solution
An electrically controllable viewing angle switch device is introduced, featuring a display panel with a liquid crystal layer and light-shielding patterns on a substrate, where the orthographic projection area of spacers is less than or equal to the light-shielding patterns, reducing light leakage and enhancing display quality and anti-peep functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a photo spacer is used to control liquid crystal layer thickness, then the liquid crystal cell can be manufactured with good elasticity and immobility, but light leakage occurs near the spacer which affects display quality and anti-peep effect
Solution Approach 1:
A light-shielding layer is introduced as an intermediary component between the spacer and the liquid crystal layer. This light-shielding layer acts as a mediator to block the light leakage that occurs near the spacer, preventing the harmful effect from reaching the liquid crystal layer while maintaining the manufacturing advantages of using photo spacers.
Solution Approach 2:
The light-shielding function is extracted from the spacer structure itself and separated into a distinct light-shielding layer. This allows the spacer to maintain its primary function of controlling liquid crystal layer thickness while the separate light-shielding layer specifically addresses the light leakage issue, enabling independent optimization of both functions.
2Adaptability or versatility
If alignment layers are disposed between electrode layers and liquid crystal layer to define optical axis direction, then the liquid crystal cell achieves electrically controllable viewing angle switching, but the structure becomes more complex
Solution Approach 1:
The alignment layers are designed to serve multiple functions simultaneously: they define the optical axis direction for viewing angle control, provide electrical connection pathways between electrode layers, and work in conjunction with the light-shielding layer to maintain uniform liquid crystal alignment. This multi-functionality reduces the need for separate components and simplifies the overall structure.
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 effectively minimizes light leakage and improves both display quality and anti-peep performance by ensuring the orthographic projection of spacers is within the light-shielding patterns, thereby protecting confidential information.
Implementation Method 1
an electrically controllable liquid crystal cell may include two electrode layers, a liquid crystal layer disposed between the two electrode layers
Implementation Method 2
The multiple light-shielding patterns are disposed on the second substrate... effectively minimizes light leakage
Data Source
AI summary
An electrically controllable viewing angle switch device is provided with a first substrate, a second substrate, a liquid crystal layer, multiple spacers, and multiple light-shielding patterns. The first substrate and the second substrate are overlapped with each other. The liquid crystal layer and the multiple spacers are disposed between the first substrate and the second substrate. The multiple light-shielding patterns are disposed on the second substrate. The orthographic projection area of each spacer on the second substrate is less than or equal to the orthographic projection area of each light-shielding pattern on the second substrate. The orthographic projection of each spacer on the second substrate is located within the orthographic projection of each light-shielding pattern on the second substrate. A display apparatus using an electrically controllable viewing angle switch device is also provided, in which light leakage near the spacer is extremely slight.