Dual-Substrate LCD Panel Horizontal Electric Field Design
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Solution Overview
Problem
Conventional liquid crystal display panels face challenges in achieving high display quality due to the presence of vertical electric field components, which affect the deflection of liquid crystal molecules and increase driving voltage, limiting light transmittance and viewing angle.
Innovation Solution
The liquid crystal display panel design features a first and second pixel electrode on a first substrate, with a second common electrode on a second substrate having no overlap region directly facing the pixel electrodes, generating horizontal electric fields that enhance the deflection of liquid crystal molecules without vertical components, thereby reducing driving voltage and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional single common electrode configuration is used in ADS type liquid crystal display, then the device complexity is low, but vertical electric field components are generated that reduce display quality
Solution Approach 1:
The single common electrode is divided into two separate common electrodes (first common electrode on array substrate, second common electrode on color filter substrate), allowing independent control of electric field components and elimination of vertical field interference
Solution Approach 2:
The electrode configuration transitions from a single-plane structure to a dual-substrate structure, utilizing the third dimension (substrate separation) to eliminate vertical electric field components while maintaining horizontal field effectiveness
2Power
If the second common electrode has overlap regions facing the pixel electrodes, then the electrode area is increased, but vertical electric field components are generated that increase driving voltage
Solution Approach 1:
The harmful overlap regions are completely removed from the second common electrode design, extracting only the beneficial horizontal electric field generation function while eliminating the harmful vertical field component generation
Solution Approach 2:
The second common electrode is designed with non-uniform area distribution, concentrating electrode material only in regions that generate horizontal electric fields while leaving regions that would generate vertical fields empty
3Illumination intensity
If conventional electrode configuration is used, then the device structure is simple, but light transmittance is limited due to vertical electric field components
Solution Approach 1:
Separating the common electrode function into two distinct electrodes on different substrates enables pure horizontal electric field generation, maximizing light transmittance by eliminating vertical field interference with liquid crystal molecule orientation
Solution Approach 2:
By distributing common electrodes across two different substrates separated by the liquid crystal layer, the design utilizes spatial separation to eliminate harmful vertical field components while maintaining effective horizontal field generation for optimal optical performance
4Adaptability or versatility
If conventional single common electrode design is used, then the manufacturing process is simple, but viewing angle is limited due to vertical electric field components
Solution Approach 1:
Dividing the common electrode into two separate electrodes allows independent optimization of each electrode's position and shape, enabling superior viewing angle performance through precise control of horizontal electric field distribution
Solution Approach 2:
The dual-substrate electrode configuration uses the thickness dimension of the liquid crystal cell to eliminate vertical field components, creating a viewing angle-independent display performance by maintaining pure horizontal electric field orientation from all viewing directions
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
This configuration increases the deflection degree of liquid crystal molecules, reduces driving voltage, and enhances display quality by minimizing vertical electric fields, resulting in higher light transmittance and wider viewing angles.
Implementation Method 1
multi-dimensional electric field is formed by electric field generated between a common electrode and a pixel electrode on array substrate. Horizontal electric field component of the multi-dimensional electric field enables liquid crystal molecules in all orientation between slit electrodes and right above the electrodes in liquid crystal cell to rotate/deflect
Implementation Method 2
The horizontal electric field enable liquid crystal molecules in all orientation between the slit electrodes and right above the electrodes in liquid crystal cell to rotate/deflect, so that the efficiency of liquid crystal is improved and light transmission efficiency is increased
Data Source
AI summary
A liquid crystal display (LCD) panel, a display apparatus and a method for driving the display apparatus capable of providing a LCD panel having good display quality are provided. The liquid crystal display panel comprises: a first substrate (11) and a second substrate (21) opposite to each other, a pixel array provided on the first substrate (11), and a liquid crystal layer (3) between the first substrate (11) and the second substrate (21). The liquid crystal display panel further comprising a first common electrode (12) disposed on a side of the first substrate (11) close to the liquid crystal layer (3) and a second common electrode (22) disposed on a side of the second substrate (21) close to the liquid crystal layer (3). A first pixel electrode (1) and a second pixel electrode (2) are disposed on the first substrate (11). The second common electrode (22) has no overlap region directly facing the first pixel electrode (1) and/or the second pixel electrode (2).