E Ink. has been granted a patent for an advanced electrophoretic display technology. This innovation features a unique combination of charged particles that enhance color display capabilities and enable rapid transitions between white and black pixels, improving overall display performance. GlobalData’s report on E Ink gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on E Ink, E-transaction user interfaces was a key innovation area identified from patents. E Ink's grant share as of June 2024 was 57%. Grant share is based on the ratio of number of grants to total number of patents.
Color electrophoretic display with improved particle mobility
The granted patent US12044945B2 describes a color electrophoretic display that integrates a light-transmissive electrode and a backplane featuring an array of thin film transistors (TFTs) connected to pixel electrodes. Each TFT is constructed with a layer of metal oxide semiconductor, specifically indium gallium zinc oxide (IGZO). The display utilizes an electrophoretic medium situated between the electrode and the backplane, which consists of a non-polar fluid containing a four-particle system. This system includes particles with distinct optical properties and charge polarities, designed to enhance the display's color capabilities. The particles are categorized based on their charge magnitudes and surface coatings, with specific configurations aimed at optimizing electrophoretic mobility under varying electric fields.
The claims further detail the characteristics of the particles, including their optical properties and the specific colors they represent, such as white, cyan, magenta, and yellow. The patent outlines the operational parameters of the display, including the separation distance between the electrode and backplane, the electrophoretic mobility of the particles at different voltage levels, and the ability of the TFTs to switch control voltages effectively. The inclusion of charge control agents and the specific arrangements of the particles are also highlighted, indicating a sophisticated approach to achieving desired optical states in the display. Overall, the patent presents a comprehensive framework for a color electrophoretic display that leverages advanced materials and configurations to enhance visual performance.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
