Japan Display. has been granted a patent for a display device featuring a substrate with two types of thin film transistors—polysilicon and oxide semiconductors. The design includes multiple insulating films and light shading films, facilitating electrical connections through strategically placed through holes. GlobalData’s report on Japan Display 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 Japan Display, Under-screen fingerprint recognition was a key innovation area identified from patents. Japan Display's grant share as of July 2024 was 59%. Grant share is based on the ratio of number of grants to total number of patents.
Display device with multiple thin film transistors and insulating films
The patent US12072595B2 describes a display device that integrates multiple layers and components to enhance its functionality. The device features a substrate with two types of thin film transistors: one utilizing a polysilicon semiconductor layer and the other an oxide semiconductor layer. Key components include light shading films positioned between the semiconductor layers and the substrate, as well as a series of insulating films that facilitate electrical connections. The design incorporates through holes that allow for the passage of conductive components, ensuring that the first conductive component connects with the first light shading film while maintaining specific spatial relationships with the insulating layers. The claims also detail the application of fixed voltages to the light shading films and the configuration of pixel electrodes and common electrodes within the display.
Additionally, the patent outlines the structural relationships between various components, such as the first and second thin film transistors, their respective gate electrodes, and the insulating films. It specifies the formation of conductive films and the strategic placement of through holes that enable electrical connections between different layers. The claims further elaborate on the integration of aluminum oxide films and the specific arrangements of source and drain electrodes in relation to the insulating films. Overall, the patent presents a comprehensive framework for a display device that optimizes the arrangement of its components to improve performance and functionality.
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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.
