TFT-LCD Array Substrate with Built-in Grid Graph Polarizer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
TFT-LCDs face high light consumption and high production costs due to the inefficiency of absorption-type polarizers, which waste over 50% of light and account for a significant portion of the manufacturing cost.
Innovation Solution
The integration of metal pixel electrodes with a grid graph on the TFT-LCD array substrate serves as a built-in polarizer, reflecting unwanted light and reducing the need for external polarizers, thereby enhancing light utilization efficiency and lowering production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If absorption-type polarizers are attached to the array substrate and color filter substrate, then the TFT-LCD can polarize natural light, but more than 50% of light is wasted and power utilization efficiency is less than 50%
Solution Approach 1:
The patent merges the polarizer function with the pixel electrode by forming a grid graph structure directly on the pixel electrode surface. This integration eliminates the need for separate attached polarizers, allowing the pixel electrode to simultaneously serve as both the pixel definition structure and the polarizing element, thereby reducing light waste and improving power utilization efficiency.
Solution Approach 2:
Instead of using absorption-type polarizers that absorb unwanted light, the patent employs reflection-type polarizers that reflect unwanted light. The grid graph structure on the pixel electrode reflects polarized light in a direction that can be reused, inverting the traditional absorption mechanism and significantly reducing light waste.
2Reliability
If pieces of polarizers are attached to the surfaces of the array substrate and color filter substrate, then the TFT-LCD can achieve polarization function, but the production cost increases due to material cost, manufacturing cost, and high technical requirements
Solution Approach 1:
The patent combines the pixel electrode and polarizer into a single integrated structure. The grid graph is formed directly on the pixel electrode during the same manufacturing process, eliminating the need for separate polarizer attachment steps. This merger reduces material costs, manufacturing costs, and technical requirements while maintaining the polarization function.
Solution Approach 2:
The pixel electrode is given multiple functions: it serves as both the pixel definition structure and the polarizer. The grid graph structure on the pixel electrode enables it to perform both electrical function (as electrode) and optical function (as polarizer), reducing the need for additional components and simplifying the manufacturing process.
3Reliability
If pieces of polarizers are attached to the surfaces of the array substrate and color filter substrate, then the TFT-LCD can achieve polarization, but the thickness and weight of the display device increase
Solution Approach 1:
The patent integrates the polarizer function into the pixel electrode structure itself, eliminating the need for separate attached polarizer pieces. This merger removes additional layers and materials from the display structure, thereby reducing both the thickness and weight of the final device while maintaining the necessary polarization function.
4Reliability
If pieces of polarizers are attached to the surfaces of the array substrate and color filter substrate, then the TFT-LCD can achieve polarization, but the attached structure influences lighting and thinning of the TFT-LCD
Solution Approach 1:
The patent merges the polarizer function with the pixel electrode, eliminating the need for separate attached polarizer layers. This integration removes additional thickness from the display structure, enabling the device to be thinner while maintaining the polarization function necessary for LCD operation.
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 solution significantly reduces light consumption and production costs by utilizing a reflection-type polarizer that reuses linearly polarized light, while simplifying the manufacturing process by eliminating the need for sputtering and via hole production steps.
Implementation Method 1
a grid graph is formed on each of the pixel electrodes to make each of the pixel electrodes be simultaneously a built-in polarizer and change natural lights into linear polarized lights
Data Source
AI summary
The present invention relates to an array substrate of TFT-LCD and Method for manufacturing the same. The array substrate includes: gate lines, data lines, pixel electrodes and TFTs formed on a substrate; and a grid graph formed on each of the pixel electrode to make each of the pixel electrodes be simultaneously a built-in polarizer and change natural lights into linear polarized lights. The method for manufacturing an array substrate includes: forming a graph including gate electrodes and gate lines on a substrate; depositing continuously a gate insulating layer, a semiconductor layer and a doped semiconductor layer, and forming graphs of semiconductor layers and doped semiconductor layers above the gate electrodes; forming graphs of source electrodes, drain electrodes, data lines and pixel electrodes, in which a grid graph formed on each of the pixel electrode to make each of the pixel electrodes be simultaneously a built-in polarizer and change natural lights into linear polarized lights. In the present invention, there is no need to attach polarizer of absorption type to the array substrate after being disposed with the color filter substrate as a cell, thereby reducing the production cost of the TFT-LCD, and which is propitious to reduce the thickness of the TFT-LCD and increase the power utilization efficiency greatly of LCD.