TFT Space Region for Liquid Crystal Alignment
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Solution Overview
Problem
Current LCD display technologies face challenges in achieving ultra-high Pixels Per Inch (PPI) due to difficulties in aligning and assembling liquid crystal layers during the manufacturing process, leading to low pixel density and malposition issues.
Innovation Solution
A display panel design featuring a thin film transistor with a gate, source, and drain arranged on a base substrate, where a space region filled with liquid crystal molecules is controlled by the source and drain, eliminating the need for complex alignment and assembly processes, and including additional passivation and planarization layers for improved manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional liquid crystal alignment and assembly processes are used, then liquid crystal layers can be formed, but manufacturing complexity increases and pixel density decreases due to malposition issues
Solution Approach 1:
The patent extracts the liquid crystal molecules from the traditional separate alignment and assembly process, directly filling them into the space region between source and drain electrodes during the TFT manufacturing process. This eliminates the need for complex post-manufacturing alignment and assembly operations, resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
The patent merges the liquid crystal filling process with the TFT manufacturing process into a single integrated workflow. The space region is formed and filled with liquid crystal molecules during the same manufacturing sequence as the TFT structure, combining what were previously separate processes into one unified manufacturing flow, thereby reducing overall complexity and improving precision.
2Manufacturing precision
If complex alignment and assembly processes are used, then liquid crystal layers can be positioned, but manufacturing time increases and productivity decreases
Solution Approach 1:
The patent performs preliminary action by pre-forming the space region between source and drain electrodes during the TFT manufacturing process before the liquid crystal filling step. This preliminary structuring eliminates the need for time-consuming alignment and assembly operations later, achieving both precise positioning and improved manufacturing efficiency.
Solution Approach 2:
The TFT structure itself serves the dual function of both device operation and liquid crystal containment. The space region formed by the source and drain electrodes automatically defines the liquid crystal filling area, making the TFT structure self-sufficient for both its electrical function and liquid crystal positioning, thereby eliminating separate alignment processes and improving productivity.
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 design simplifies the manufacturing process, enhances pixel density, and improves display performance by allowing for better control of liquid crystal molecule rotation, thereby achieving higher PPI without the malposition issues associated with traditional methods.
Implementation Method 1
The source and the drain are configured to control rotation of the liquid crystal molecules
Data Source
AI summary
The present disclosure provides a display panel and a manufacturing method thereof, a driving method and a display device. The display panel includes: a base substrate and a thin film transistor on a surface of the base substrate. The thin film transistor includes: a gate, and a source and a drain arranged along a first direction, and a first passivation layer covering the gate, the source and the drain. a space region in which liquid crystal molecules are filled is formed in the first passivation layer. The space region is between the source and the drain. The source and the drain are configured to control rotation of the liquid crystal molecules.