Nanoparticle Display Substrate Without TFT Arrays for Thin Color Panels
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Solution Overview
Problem
Existing display panels face challenges in achieving ultra-thinness and simplicity in preparation due to complex processes involving Thin Film Transistor (TFT) arrays, leading to increased thickness.
Innovation Solution
A display substrate design comprising a base substrate with stacked conductive layers and a nanoparticle layer, where sub-pixels are defined by intersecting electrodes, allowing for voltage-controlled deformation to adjust light absorption and achieve color display without requiring TFT arrays, thus simplifying the process and reducing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TFT arrays are used in display panels, then display functionality is achieved, but device thickness increases and preparation complexity increases
Solution Approach 1:
The patent extracts and removes the TFT array component from the display panel structure, replacing it with a simplified electrode-nanoparticle system. This extraction eliminates the thick transistor layers while retaining the essential display functionality through voltage-controlled nanoparticle deformation.
Solution Approach 2:
The patent changes the operational parameters from TFT-based electrical switching to direct voltage-controlled mechanical deformation of nanoparticle layers. This parameter change enables display functionality with significantly reduced thickness by using flexible substrate and thin-film electrodes instead of rigid TFT structures.
2Reliability
If TFT arrays are used in display panels, then display functionality is achieved, but preparation process complexity increases
Solution Approach 1:
The patent extracts the complex TFT fabrication process and replaces it with simpler electrode deposition and nanoparticle layer formation steps. This eliminates multiple photolithography, etching, and doping processes associated with TFT manufacturing.
Solution Approach 2:
The patent changes the manufacturing approach from semiconductor fabrication processes to thin-film deposition and nanoparticle assembly techniques. This parameter change simplifies the preparation process while maintaining display functionality through the electrode-nanoparticle system.
3Reliability
If traditional display panel structures are used, then manufacturing robustness is maintained, but ultra-thinness cannot be achieved
Solution Approach 1:
The patent employs flexible substrate and thin-film electrode structures to achieve ultra-thinness. The flexible substrate allows for thin-film deposition without requiring the rigid support structures needed in traditional panels, enabling thickness reduction while maintaining structural integrity.
Solution Approach 2:
The patent uses composite material structures combining flexible substrate, thin-film electrodes, and nanoparticle layers. This composite approach achieves both ultra-thinness and manufacturing robustness by selecting materials that provide mechanical strength at minimal thickness.
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 design enables a lightweight and thin display substrate with adjustable light absorption characteristics, enabling color display through voltage-controlled deformation of the nanoparticle and conductive layers, overcoming the complexity and thickness issues of traditional TFT-based panels.
Implementation Method 1
applying different voltages to multiple first electrodes and multiple second electrodes to cause a deformation layer between the first electrodes and the second electrodes to generate different degrees of deformation
Implementation Method 2
changing a pitch between the nanoparticles corresponding to the second overlapping region and the first electrode, so that a light absorption wavelength of the nanoparticles is changed
Data Source
AI summary
A display substrate includes a base substrate, and a first conductive layer, a deformation layer, a second conductive layer, and a nanoparticle layer stacked on the base substrate; the first conductive layer includes multiple first electrodes, the second conductive layer includes multiple second electrodes, and the nanoparticle layer includes multiple nanoparticles; the display substrate includes multiple sub-pixels defined by intersection of the multiple first electrodes and the multiple second electrodes; multiple first overlapping regions exist between orthographic projections of the multiple first electrodes and the multiple second electrodes on the base substrate, and a second overlapping region exists between any one of the first overlapping regions and an orthographic projection of at least one of the nanoparticles on the base substrate; and an orthographic projection of each sub-pixel on the base substrate at least partially overlaps with at least two adjacent second overlapping regions.