Electrophoretic Display Inkjet Printing Partitioning Wall
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Solution Overview
Problem
The manufacturing of electrophoretic displays is hindered by inefficiencies in producing electrophoretic particles and microcapsules, and accurately disposing microcapsules on thin film transistor array panels, leading to decreased manufacturing efficiency and display performance.
Innovation Solution
An electrophoretic display design featuring a thin film transistor, pixel electrode, partitioning wall, ink with dispersed electrophoretic members, and a common electrode panel, where the partitioning wall can be made of organic or inorganic materials and formed in a lattice shape, with the electrophoretic members including particles of various colors and a dispersion medium, and a manufacturing method involving jetting to precisely position the ink on the pixel electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microcapsules containing electrophoretic particles and dispersion medium are manufactured and disposed on pixel electrodes, then electrophoretic display function is achieved, but manufacturing complexity increases and manufacturing precision deteriorates due to difficulty in precise disposal
Solution Approach 1:
The patent extracts the dispersion medium from the microcapsule structure, creating free electrophoretic particles that are directly disposed on the pixel electrode without requiring microcapsule formation. This eliminates the complex steps of microcapsule manufacturing and disposal while maintaining the electrophoretic display function through direct particle placement in the ink layer.
2Quantity of substance
If microcapsules are manufactured and disposed on pixel electrodes, then electrophoretic particles are contained, but manufacturing efficiency decreases due to additional manufacturing steps
Solution Approach 1:
The invention removes the microcapsule containment structure entirely, allowing electrophoretic particles to be directly incorporated into the ink layer during the inkjet printing process. This extraction of the microcapsule component eliminates multiple manufacturing steps including microcapsule synthesis, filling, and disposal, thereby significantly improving manufacturing efficiency while maintaining particle containment through the ink matrix.
Solution Approach 2:
The patent merges the electrophoretic particles directly into the ink formulation, combining the particle containment function with the ink layer itself. This integration eliminates the need for separate microcapsule structures and their associated manufacturing processes, streamlining production while ensuring particles remain suspended and functional within the display medium.
3Reliability
If microcapsules are precisely disposed on pixel electrodes, then display performance improves, but manufacturing difficulty increases due to precision requirements
Solution Approach 1:
By removing the microcapsule structure, the invention eliminates the need for precise microcapsule placement. The electrophoretic particles are instead disposed as part of the inkjet printing process, which naturally achieves adequate distribution and positioning through the ink layer application, thereby maintaining display performance while reducing manufacturing precision requirements.
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 enhances manufacturing efficiency and display performance by allowing precise placement of electrophoretic members and eliminating the need for additional steps in creating capsules, thereby improving the overall production process and image rendering capabilities.
Implementation Method 1
the particles migrate electrophoretically to the plate with a charge opposite that of the particles
Data Source
AI summary
An electrophoretic display includes a thin film transistor formed on an insulation substrate, a pixel electrode electrically connected to the thin film transistor, a partitioning wall partitioning the pixel electrode, an ink formed on the pixel electrode exposed between sections of the partitioning wall and in which an electrophoretic member is dispersed, and a common electrode panel formed on the ink and the partitioning wall and having a common electrode.