Strip Electrodes for TFT-LCD Response Time Reduction
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Solution Overview
Problem
Conventional thin film transistor liquid crystal displays (TFT-LCDs) have long response times due to factors like rotation viscosity, elasticity coefficient, thickness, temperature, and driving means, which negatively impact display performance.
Innovation Solution
Incorporating first and second strip-like electrodes on the color filter substrate, electrically insulated from each other, to form a horizontal electric field that assists in the deflection and restoration of liquid crystal molecules, thereby reducing response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional alignment layers and single electrode structure are used, then the manufacturing process is standard, but the response time is long which impacts display performance
Solution Approach 1:
The single electrode on the color filter substrate is segmented into two separate strip-like electrodes (first and second strip-like electrodes) that are electrically insulated from each other. This segmentation creates a horizontal electric field between the two electrodes, which works cooperatively with the vertical electric field from the pixel electrode to accelerate liquid crystal molecule response and reduce display response time.
Solution Approach 2:
The patent introduces a horizontal electric field dimension by adding strip-like electrodes arranged horizontally on the color filter substrate, complementing the existing vertical electric field from the pixel electrode. This multi-dimensional electric field approach accelerates liquid crystal molecule deflection and restoration, significantly reducing response time without complicating the manufacturing process.
2Loss of time
If response time is reduced through material properties changes, then display performance improves, but manufacturing complexity and cost increase
Solution Approach 1:
Rather than changing material properties, the patent segments the electrode structure into two strip-like electrodes that can be manufactured using standard photolithography and patterning processes. This segmentation enables horizontal electric field generation without requiring new materials or complex manufacturing steps.
Solution Approach 2:
The strip-like electrodes act as intermediary elements that generate a horizontal electric field to assist the main vertical electric field from the pixel electrode. This intermediary horizontal field accelerates liquid crystal response without requiring changes to the liquid crystal material properties or alignment layers, maintaining manufacturing simplicity.
3Device complexity
If alignment layers are removed to simplify structure, then manufacturing is simplified, but liquid crystal molecule control becomes difficult
Solution Approach 1:
The strip-like electrodes serve as intermediary elements that provide the necessary electric field control for liquid crystal molecules without requiring alignment layers. The horizontal electric field generated between the strip electrodes works cooperatively with the vertical field to reliably control liquid crystal deflection and restoration, maintaining display reliability while simplifying the overall structure.
Solution Approach 2:
By introducing the horizontal electric field dimension through strip-like electrodes, the patent provides sufficient electric field control for liquid crystal molecules without relying on alignment layers. This multi-dimensional electric field approach ensures reliable liquid crystal control while eliminating the need for complex alignment layer structures.
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 horizontal electric field significantly decreases the response time of the liquid crystal display without the need for alignment layers, simplifying the structure and manufacturing process while improving display performance.
Implementation Method 1
applying signals on the first strip-like electrode and the second strip-like electrode signal after the thin film transistor of the sub-pixel area is turned on and before a data signal is applied on the pixel electrode of the sub-pixel area, such that a horizontal electric field is formed between the first strip-like electrode and the second strip-like electrode
Data Source
AI summary
Embodiments of the disclosed technology provide a TFT-LCD and manufacturing method and driving method thereof. The TFT-LCD comprises a color filter substrate, an array substrate, and a liquid crystal layer sandwiched between the color filter substrate and the array substrate. A first strip-like electrode and a second strip-like electrode are formed in the area of a black matrix on the color filter substrate, an area surrounded by the first strip-like electrode and the second strip-like electrode comprises at least one sub-pixel area, and the first strip-like electrode and second strip-like electrode are electrically insulated from each other.