Electrochromic Display Substrate Fabrication via Electrochemical Deposition
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Solution Overview
Problem
Conventional methods for fabricating electrochromic devices are complex and costly due to the need for partition walls and electrochromic material printing, which complicates the manufacturing process and increases costs.
Innovation Solution
A method involving the formation of an electrode layer with electrode blocks on a base substrate, followed by electrochemically depositing an electrochromic material onto these blocks using a voltage, eliminating the need for partition walls and printing processes, and utilizing an insulating matrix with a grid pattern to define subpixel regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods using partition walls and electrochromic material printing are employed, then electrochromic devices can be fabricated with defined subpixel regions, but the manufacturing process becomes complex and costly
Solution Approach 1:
The patent extracts and eliminates the partition wall structure from the electrochromic device fabrication process. Instead of building physical barriers to define subpixel regions, the invention uses electrochemical deposition to directly create spatially separated electrochromic material blocks on electrode blocks, removing the complex partition wall manufacturing steps while maintaining precise subpixel region definition
Solution Approach 2:
The patent replaces the mechanical printing process with an electrochemical deposition process. Instead of mechanically depositing electrochromic material through printing onto defined regions, the invention uses electrochemical reactions driven by voltage application to deposit material only on conductive electrode blocks, substituting a chemical/electrical process for a mechanical one and thereby simplifying fabrication
2Reliability
If partition walls are used to define subpixel regions, then cross-talk between subpixels can be prevented, but manufacturing costs increase
Solution Approach 1:
The patent employs the self-service principle where the electrochromic material deposition process automatically confines itself to the electrode block regions through electrochemical control. The electrochromic material deposits only on conductive surfaces (electrode blocks) when voltage is applied, inherently preventing cross-talk between adjacent subpixels without requiring additional partition wall structures or complex manufacturing steps
Solution Approach 2:
The patent changes the fundamental parameter of how subpixel regions are defined - from physical geometric boundaries (partition walls) to electrochemical activity boundaries (voltage-controlled deposition zones). By controlling the electrical parameters (voltage application), the system achieves both cross-talk prevention and manufacturing simplification simultaneously
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 method simplifies the fabrication process, reduces manufacturing costs, and prevents cross-talk between subpixels, resulting in a cost-effective and efficient electrochromic display substrate and apparatus.
Implementation Method 1
Electrochromic refers to a material (e.g., a compound, mixture of compounds, a solution, a composition, or a device) capable of undergoing a reversible change in electromagnetic absorption/transmittance when subjected to electrical stimulus. For example, the material may undergo an oxidative or a reductive transition upon the electrical stimulus, the reversible change may be a color change of the light transmitted from or reflected by the electrochromic material.
Implementation Method 2
forming an electrochromic layer comprising a plurality of electrochromic blocks on the electrode layer by electrochemically depositing an electrochromic material onto the plurality of electrode blocks on a side of the electrode layer distal to the base substrate
Data Source
AI summary
The present application discloses a method for fabricating a display substrate including forming an electrode layer comprising a plurality of electrode blocks on a base substrate; each electrode block corresponding to a subpixel region; and forming an electrochromic layer comprising a plurality of electrochromic blocks on the electrode layer by electrochemically depositing an electrochromic material onto the plurality of electrode blocks on a side of the electrode layer distal to the base substrate, each electrochromic block corresponding to each electrode block in a one-to-one relationship.