E Ink has been granted a patent for a reflective active device array substrate. The substrate includes active devices, a protective layer with openings exposing sources/drains, and metal oxide conductor layers connected to the active devices. This innovation enhances display technology. 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 February 2024 was 62%. Grant share is based on the ratio of number of grants to total number of patents.
Reflective active device array substrate with metal oxide conductor layers
A recently granted patent (Publication Number: US11921395B2) discloses a reflective active device array substrate designed for use in reflective display apparatus. The substrate includes a protective layer with openings exposing the source or drain of active devices dispersed on the substrate. Metal oxide conductor layers cover the protective layer and are connected to the active devices through the openings. The material of the metal oxide conductor layers can include molybdenum oxide, molybdenum-niobium oxide, tantalum oxide, or aluminum oxide. Each active device comprises a gate, semiconductor channel layer, gate insulating layer, and source and drain on the same side of the semiconductor channel layer.
Furthermore, the patent describes a reflective display apparatus incorporating the reflective active device array substrate. In addition to the components mentioned earlier, the display apparatus includes an electrophoretic display film. This film consists of a flexible substrate, a transparent conductive layer, and a display medium layer containing electrophoretic liquid and charged particles. The metal oxide conductor layers in the reflective active device array substrate are electrically connected to the source or drain of the active devices, ensuring seamless operation of the reflective display apparatus. The use of specific materials for the metal oxide conductor layers and the detailed structure of the active devices contribute to the efficiency and functionality of the reflective display apparatus as outlined in the patent claims.
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