Electronic Ink Display Screen Using One Drop Filling Process
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Solution Overview
Problem
The electrophoretic display technology faces challenges in the complexity of microcapsule electronic paper film sheet preparation, low production efficiency, high material loss, and high production costs, with traditional manufacturing processes being labor-intensive and inefficient.
Innovation Solution
The implementation of the One Drop Filling (ODF) process combined with microcapsule electrophoretic technology simplifies the electronic ink display screen structure and manufacturing process, utilizing a spacer frame with conductive silver paste and an upper transparent electrode to enhance light transmission and automation, while reducing material waste and equipment investment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional coating process is used for microcapsule electronic paper film sheet, then the coating can be formed, but the coating thickness is uneven and manufacturing precision is poor
Solution Approach 1:
The patent extracts the microcapsule electronic ink from the complex multi-layer film sheet structure and directly fills it into the display device using ODF process, eliminating the need for high-precision coating equipment and achieving uniform distribution without complex coating machinery
Solution Approach 2:
Instead of coating the electronic ink onto a film sheet and then assembling, the patent inverts the process by directly injecting the electronic ink into the display device cavity, reversing the traditional manufacturing sequence to simplify equipment requirements and improve precision
2Productivity
If traditional encapsulation technology is used for electronic paper film sheet, then the structure can be sealed, but the manufacturing process is unstable and production efficiency is low
Solution Approach 1:
The patent merges the encapsulation and sealing processes into a single integrated step by using the ODF injection process to simultaneously fill electronic ink and seal the device structure, eliminating multiple separate encapsulation steps and improving both efficiency and stability
Solution Approach 2:
The patent performs preliminary preparation of the electronic ink and sealing structure before final assembly, ensuring that all components are ready for direct injection and sealing in one step, which stabilizes the manufacturing process and increases production efficiency
3Loss of substance
If traditional trimming process is used for electronic paper film sheet, then the size can be adjusted, but the trimming loss rate is high and material utilization is low
Solution Approach 1:
The patent determines the final display device size before manufacturing and directly produces the electronic ink in the required quantity without subsequent trimming, eliminating material waste while maintaining size flexibility through customized production planning
Solution Approach 2:
The patent changes the manufacturing approach from post-production trimming to pre-determined size production, adjusting the parameter of electronic ink quantity to match the final device requirements exactly, thereby eliminating trimming loss and improving material utilization
4Extent of automation
If traditional manufacturing process is used for electronic ink display screen, then the product can be assembled, but the process is complicated and automation degree is low
Solution Approach 1:
The patent extracts the electronic ink filling process from the complex multi-step assembly process and implements it as a separate ODF injection step, which is easily automated and reduces the overall manufacturing process complexity while increasing automation degree
Solution Approach 2:
The patent replaces manual or semi-automatic assembly operations with automated ODF injection and sealing systems, substituting mechanical assembly processes with more automated fluid injection and thermal sealing processes that are easier to automate
5Ease of manufacture
If traditional manufacturing process is used for electronic ink display screen, then the product can be produced, but the production cost is high
Solution Approach 1:
The patent performs preliminary preparation of electronic ink and device structures before final assembly, ensuring that the ODF injection and sealing processes can be completed quickly in one step, reducing manufacturing time while lowering costs through process simplification
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 results in improved light transmission performance, higher yield, and the ability to produce large-size electronic ink displays with enhanced color saturation and resolution, along with reduced production time and material utilization, overcoming the limitations of traditional methods.
Implementation Method 1
the electrophoretic display technology has made its progress, and achieved great improvements in the performance and manufacturing method
Data Source
AI summary
An electronic ink display screen, wherein a spacer frame is coated on the pixel electrode by a One Drop Filling (ODF) process, the spacer frame includes a first spacer frame and a second spacer frame. The second spacer frame is located on a side of the first spacer frame. The electronic ink microcapsule array is provided inside the first spacer frame. Conductive silver paste is provided inside the second spacer frame. The upper transparent electrode is covered on the spacer frame. The conductive silver paste electrically contacts the pixel electrode and the upper transparent electrode, respectively. Peripheries of the spacer frame and the upper transparent electrode are sealed and fixed by a waterproof adhesive. The electronic ink display screen of the present invention uses the ODF production process, so there is no complicated process in the production of the traditional electronic paper film sheet.