Thin Film Transistor Gate Insulator Color Filtering
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Solution Overview
Problem
The manufacturing process of liquid crystal display panels is complex and costly due to the need for separate fabrication of pixel and color filter arrays, which also limits panel thickness and often results in misalignment during assembly.
Innovation Solution
Incorporating insulating film layers with color-changing or light-filtering effects in thin film transistors and pixel structures, using materials like color-polymethyl methacrylate, organic and inorganic insulating materials with dyes or quantum dots, to enable the display of specific colors without additional color filter arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate fabrication processes are used for pixel array and color filter array, then each array can be optimized independently, but the manufacturing process becomes complex and costly
Solution Approach 1:
The patent combines the color filter array and pixel array into a single integrated structure where the color filter layers are formed simultaneously with the pixel electrode layers during the same fabrication process steps. This merging eliminates the need for separate fabrication processes while maintaining the ability to optimize both arrays independently through material selection and layer design.
2Ease of manufacture
If separate substrates are used for color filter array and pixel array, then each array can be manufactured independently, but misalignment occurs during assembly
Solution Approach 1:
The patent merges the color filter array and pixel array onto a single substrate, eliminating the assembly step that causes misalignment. The color filter layers are formed in the same fabrication process as the pixel electrode layers, ensuring perfect alignment between corresponding elements of both arrays without requiring separate substrate assembly.
3Adaptability or versatility
If multiple film layers are used for color filter array and pixel array, then colorful images can be displayed, but the panel thickness increases
Solution Approach 1:
The patent implements multi-functionality by designing layers that simultaneously serve multiple purposes: the color filter layers also function as pixel electrode layers, and the same fabrication process steps produce both the color filtering structure and the pixel electrode structure. This reduces the total number of film layers needed while maintaining full color display capability.
4Adaptability or versatility
If additional color filter array is added to achieve colorful images, then color display is improved, but manufacturing cost increases
Solution Approach 1:
The patent achieves color display capability without adding a separate color filter array by making the pixel electrode layers themselves function as color filter layers. The same fabrication processes that create the pixel electrodes also create the color filtering structure, eliminating the need for additional manufacturing steps and reducing overall 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
This approach simplifies the manufacturing process, reduces costs, and prevents misalignment by allowing the liquid crystal display panel to display colorful images without the need for a separate color filter array, thereby enhancing process yield and reducing manufacturing complexity.
Implementation Method 1
a light shows a specific color after passing through the gate insulator
Implementation Method 2
a highly dielectric organic layer disposed between the gate insulating layer and the semi-conductive layer
Data Source
AI summary
A thin film transistor disposed on a substrate is provided. The thin film transistor includes a gate, a semi-conductive layer, a gate insulator, a source and a drain. The gate insulator is located between the gate and the semi-conductive layer. A light shows a specific color after passing through the gate insulator. The source and the drain are disposed on the semi-conductive layer. A pixel structure and a liquid crystal display panel having the pixel structure are also provided. The liquid crystal display panel can display colorful images without disposing a color filter array additionally so that the manufacturing process of the liquid crystal panel is simple and the manufacturing cost of the liquid crystal panel is low.