Thin Film Transistor Panel With Symmetrical Sub-Pixel Electrodes
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Solution Overview
Problem
Liquid crystal display apparatuses with a vertical alignment mode face challenges in maintaining side visibility compared to front visibility, as existing methods for achieving wide viewing angles, such as cut portions and protrusions on electric field generating electrodes, do not effectively address side visibility issues.
Innovation Solution
A thin film transistor panel is designed with pixel electrodes divided into sub-pixel electrodes, applying different voltages and structures to each sub-pixel, including left-right symmetrical arrangements and cut portions to control liquid crystal molecule tilt directions, thereby enhancing side visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cut portions or protrusions are formed on electric field generating electrodes to achieve wide viewing angle, then tilted directions of liquid crystal molecules are distributed, but side visibility deteriorates compared to front visibility
Solution Approach 1:
The pixel electrode is divided into multiple sub-pixel electrodes (first sub-pixel electrode and second sub-pixel electrode) that are electrically isolated from each other. Each sub-pixel electrode can be independently controlled to generate different electric field patterns, enabling distributed tilting of liquid crystal molecules in multiple directions to improve viewing angle while maintaining manufacturing simplicity
Solution Approach 2:
Different voltage levels are applied to different sub-pixel electrodes within the same pixel. The first sub-pixel electrode receives a first voltage and the second sub-pixel electrode receives a second voltage, creating localized electric field variations that control liquid crystal molecule orientation in specific regions to enhance side visibility
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 improves side visibility by applying different voltages to sub-pixel electrodes, ensuring uniform visibility and maximizing the aperture ratio, while maintaining high contrast ratios and wide viewing angles.
Implementation Method 1
apply a voltage to electric field generating electrodes to generate an electric field in the liquid crystal layer to determine the alignment of liquid crystal molecules
Implementation Method 2
capacitive coupling electrodes connected to the drain electrodes
Data Source
AI summary
A thin film transistor panel is provided. The thin film transistor panel includes: a substrate; gate lines formed on the substrate; data lines insulated from the gate lines and intersecting the gate lines; thin film transistors which are connected to the gate lines and the data lines and have drain electrodes; capacitive coupling electrodes connected to the drain electrodes; and pixel electrodes which are formed in the pixels surrounded by the gate lines and the data lines and include first pixel electrodes connected to the drain electrodes and second pixel electrodes which are separated from the first pixel electrodes and overlap with the capacitive coupling electrodes, wherein the first and second pixel electrodes of different pixel electrodes have a left-right symmetrical structure.