Plasmonic Color Filter Integrated with Gate Electrode
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Solution Overview
Problem
Current liquid crystal display technologies face challenges with low transmissivity and increased manufacturing costs due to the need for separate materials and processes for gate and common electrodes, as well as the complexity of forming plasmonic color filters.
Innovation Solution
A display panel design where the plasmonic color filter is formed using the same material as the gate electrode, with a thin film transistor and pixel electrode configuration that allows for simplified manufacturing and reduced costs by eliminating the need for additional color filter processes, and includes lithium fluoride layers for improved optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate materials are used for gate electrode and common electrode to meet different electrical and optical requirements, then electrical performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent combines the gate electrode and common electrode into a single integrated structure formed by one material layer. The gate electrode includes a gate line and gate electrode, while the common electrode is formed simultaneously as part of the same material deposition process, eliminating the need for separate material layers and reducing manufacturing complexity while maintaining electrical performance
Solution Approach 2:
The single material layer serves multiple functions: it forms both the gate electrode (for applying gate voltage to control liquid crystal) and the common electrode (for applying common voltage). This multi-functional design reduces the number of manufacturing steps while meeting different electrical requirements through structural configuration rather than material differentiation
2Illumination intensity
If plasmonic color filter is used to improve light transmissivity, then optical performance is improved, but manufacturing cost increases due to additional processes
Solution Approach 1:
The patent merges the color filter function with the gate electrode structure by forming both simultaneously from the same material layer. The gate electrode material is patterned to create both the electrical conductive paths and the color filter regions with holes, eliminating the need for separate color filter deposition processes and reducing manufacturing cost while maintaining high light transmissivity
Solution Approach 2:
The plasmonic color filter effect is achieved by controlling the optical properties of the metal material itself through nanoscale hole patterns. The metal layer with periodic holes acts as a plasmonic color filter that selectively transmits light wavelengths, providing color functionality without requiring additional organic dye layers or separate color filter materials
3Illumination intensity
If high transmissivity material is used for common electrode to improve optical performance, then light transmission is improved, but electrical performance (low resistance) deteriorates
Solution Approach 1:
The patent changes the structural parameters of the metal layer rather than selecting between conflicting materials. By controlling the thickness, hole size, and hole density of the metal layer, the patent optimizes both electrical conductivity and optical transmissivity simultaneously, achieving low resistance while maintaining high light transmission through parameter optimization rather than material selection
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 enhances transmissivity and reduces manufacturing costs by integrating the plasmonic color filter with the gate electrode, allowing for efficient light transmission and simplified production processes while maintaining high side-visibility and luminance.
Implementation Method 1
a plasmonic color filter to which a common voltage is configured to be applied and comprising a same material as the gate electrode
Data Source
AI summary
A display panel includes a first substrate comprising a plurality of pixel areas, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate, a thin film transistor comprising a gate electrode disposed on the first substrate, a semiconductor pattern overlapping with the gate electrode, a source electrode and a drain electrode overlapping with the semiconductor pattern and spaced apart from each other, a plasmonic color filter to which a common voltage is configured to be applied, and comprising a same material as the gate electrode, disposed on a same layer as the gate electrode, and comprising a plurality of holes through which light is configured to be transmitted and a pixel electrode to which a gray scale voltage is configured to be applied, and overlapping with the plasmonic color filter, and electrically connected to the drain electrode.