Parallel Electrode Width for IPS Transmittance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional in-plane switching (IPS) liquid crystal display devices have reduced transmittance due to their complex electrode structure, which increases fabrication costs and is particularly problematic for small and mid-sized terminal devices.
Innovation Solution
A liquid crystal display device with a parallel electrode pair where the electrode width is smaller than the thickness of the liquid crystal layer, allowing the orientation of liquid crystal molecules above the electrodes to change in the same direction as those between the electrodes, enhancing transmittance and viewing angle characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional IPS electrode structure is used, then the liquid crystal molecules can be controlled to improve viewing angle, but the transmittance is reduced due to the complex electrode structure
Solution Approach 1:
The patent changes the geometric parameters of the electrode structure, specifically setting the electrode width to be smaller than the liquid crystal layer thickness. This parameter change modifies the electric field distribution to reduce its vertical component, allowing liquid crystal molecules above the electrodes to align horizontally and improve transmittance while maintaining viewing angle characteristics.
Solution Approach 2:
The patent addresses the three-dimensional orientation control of liquid crystal molecules by introducing a new dimension in the electrode design. By making the electrode width smaller than the liquid crystal layer thickness, the electric field effect extends vertically through the entire liquid crystal layer, enabling uniform horizontal alignment of molecules both between and above the electrodes.
2Illumination intensity
If a complex electrode structure is used to improve transmittance, then viewing angle characteristics can be enhanced, but fabrication costs increase
Solution Approach 1:
The patent simplifies the electrode structure by changing only one key parameter - the electrode width - to be smaller than the liquid crystal layer thickness. This single parameter change eliminates the need for complex multi-layer electrode structures while achieving high transmittance, thereby reducing fabrication complexity and costs.
3Device complexity
If conventional electrode dimensions are used, then the electrode structure is simple, but transmittance is reduced due to vertical electric field effects
Solution Approach 1:
The patent achieves high transmittance with a simple electrode structure by changing the electrode width parameter to be smaller than the liquid crystal layer thickness. This parameter change modifies the electric field distribution to minimize vertical field components, allowing liquid crystal molecules to align horizontally and maximize light transmission without complicating the electrode design.
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 increases transmittance and viewing angle characteristics while simplifying the electrode structure, reducing fabrication costs and power consumption, particularly beneficial for small and mid-sized terminal devices.
Implementation Method 1
the orientation of liquid crystal molecules between the electrodes is changed by an electric field generated by the parallel electrode pair
Implementation Method 2
the orientation of liquid crystal molecules disposed above the electrodes is changed in the same direction as in the liquid crystal molecules between the electrodes
Data Source
AI summary
In a liquid crystal display device, a liquid crystal layer is provided between a principal substrate and an opposing substrate that are disposed so as to face each other, and a shared electrode and a pixel electrode, which is a parallel electrode pair formed in the shape of a comb, are formed on the surface of the principal substrate that faces the opposing substrate. Orientation films are also formed on the opposing surfaces of the principal substrate and the opposing substrate. The electrodes of the parallel electrode pair are formed so that the width thereof is smaller than the thickness of the liquid crystal layer. The orientation of the liquid crystal molecules between the electrodes is thereby changed by an electric field generated by the parallel electrode pair, and the orientation of liquid crystal molecules disposed above the electrodes is changed in the same direction as in the liquid crystal molecules between the electrodes in accordance with the change in orientation of the liquid crystal molecules between the electrodes. A high degree of transmittance can thereby be achieved by a simple electrode structure in an in-plane switching liquid crystal display device.