Color Filter Pixel Segmentation for Electrophoretic Displays
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Solution Overview
Problem
Color mixture and distortion occur in existing color filters due to pigment fading and mixing during the manufacturing process of electrophoretic display apparatuses.
Innovation Solution
A color filter with pixel units defined on a substrate to create blank regions, each comprising multiple color filter films (green, blue, and red) and a transparent protecting layer, formed using a heat transfer printing process, such as laser transfer printing, to prevent pigment mixing and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color filter films are sequentially disposed on predetermined positions by heat transfer printing process, then color filter layer can be formed, but pigments may fade and mix with each other causing color mixture and color distortion
Solution Approach 1:
The color filter layer is divided into multiple independently disposed pixel units, each containing specific color filter films. This segmentation prevents pigment mixing by creating physical separation between different color regions, while still allowing heat transfer printing to be used for manufacturing.
Solution Approach 2:
Different regions of the color filter layer are given different local characteristics through the pixel unit structure. Each pixel unit is specifically designed with particular color filter films (red, green, blue) disposed in predetermined positions, creating localized color properties that prevent overall color distortion.
2Reliability
If transparent protecting layer is adhered on color filter layer by adhering layer, then protecting layer can be provided, but pigments of color filter films may fad and mix causing color mixture problems
Solution Approach 1:
The pixel unit structure with blank regions creates physical barriers that segment the color filter films. This segmentation prevents pigment fading and mixing even when the protecting layer is adhered, as the pigments are confined within their respective pixel units.
Solution Approach 2:
The pixel units with predetermined color filter film arrangements are formed before adhering the protecting layer. This preliminary structuring of color filters prevents pigment mixing from occurring in the first place, rather than attempting to prevent it after adhesion.
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
Prevents color mixture and distortion by creating separate spaces for color filter films, ensuring accurate color representation and maintaining white balance, thereby improving the manufacturing process of color filters.
Implementation Method 1
the heat transfer printing process includes a laser transfer printing process
Data Source
AI summary
A color filter suitable for being disposed on a substrate is provided. The color filter includes a plurality of pixel units separately disposed on the substrate so as to define a plurality of blank regions thereon. A color display apparatus applying the color filter is also provided, wherein the color display apparatus includes a driving circuit substrate, the color filter and a display medium layer. The color filter is disposed on the driving circuit substrate. The display medium layer is disposed between the driving circuit substrate and the color filter.