TFT Substrate Blocking Electrode for LCD Image Sticking
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Solution Overview
Problem
Large-screen LCDs face display quality degradation due to image sticking phenomena, particularly at the boundaries between neighboring pixel electrodes, which occurs during column inversion driving and other inversion driving methods, leading to unstable liquid crystal control and reduced display quality.
Innovation Solution
A TFT substrate design that includes a matrix of gate and data lines on an insulating substrate, with pixel electrodes partially overlapping previous gate lines and the addition of blocking electrodes between adjacent pixel electrodes, parallel to the gate lines, to control liquid crystal molecule alignment and prevent image sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If column inversion driving is performed to reduce power consumption, then energy efficiency is improved, but image sticking occurs at pixel boundaries due to unstable liquid crystal control
Solution Approach 1:
A blocking electrode is introduced as an intermediary element between adjacent pixel electrodes. This blocking electrode prevents direct interaction between liquid crystal molecules at pixel boundaries, thereby stabilizing liquid crystal control and preventing image sticking while allowing column inversion driving to continue for power savings
2Measurement precision
If the number of data lines and driver chips is increased to improve resolution, then display quality is improved, but manufacturing cost and device size increase
Solution Approach 1:
The pixel structure is modified by adding the blocking electrode in a new dimensional arrangement between pixel electrodes. This structural change in another dimension enables better liquid crystal control without requiring additional data lines or driver chips, thus maintaining resolution while reducing device complexity
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 suppresses image sticking by stabilizing liquid crystal alignment between pixel electrodes, thereby maintaining display quality and reducing the occurrence of image sticking issues in LCDs, even during inversion driving methods.
Implementation Method 1
a blocking electrode formed between each pixel electrode and its adjacent pixel electrode in parallel with the gate lines
Data Source
AI summary
A thin film transistor (TFT) substrate that may not have display quality degradation due to an image sticking phenomenon and a liquid crystal display having the same are disclosed for embodiments. The TFT substrate, according to one embodiment of the present invention, includes an insulating substrate, a plurality of gate lines and a plurality of data lines arranged in a matrix defined by the crossing of the gate lines and the data lines on the insulating substrate, a plurality of thin film transistors each electrically connected to the gate lines and of the data lines at crossing points of the gate lines and the data lines, a plurality of pixel electrodes each connected to the thin film transistors and partially overlapping a previous gate line, and a blocking electrode formed between each pixel electrode and its adjacent pixel electrode in parallel with the gate lines.