Japan Display has filed a patent for a display device that includes a display panel with pixels and an opening, an illumination device, and a color separation element. The color separation element separates the illumination light into multiple colors and irradiates the pixels and the opening with the respective colors. 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 September 2023 was 61%. Grant share is based on the ratio of number of grants to total number of patents.
Display device with color separation element for pixels and opening
A recently filed patent (Publication Number: US20230314864A1) describes a display device with unique features. The device includes a display panel with a display portion and a non-display portion surrounding it. An illumination device and a color separation element are also included in the device. The color separation element is a diffraction element with an uneven shape and is positioned between the display panel and the illumination device. Its purpose is to separate the illumination light into multiple colors.
The non-display portion of the display panel has two openings, aligned in a specific direction, that overlap with the color separation element. This arrangement allows for precise control of the color separation process.
The color separation element consists of a transparent base material and a resin layer stacked on top of it. This combination ensures the effective separation of colors.
Additionally, the color separation element includes a first element with a periodic uneven shape and a second element with an uneven shape identical to a unit element of the first element's cycle. The second element is provided at multiple places around the first element, enhancing the color separation capabilities of the device.
The length of the first opening in a direction perpendicular to the alignment direction is different from the length of the second opening. This difference in length further contributes to the precise control of color separation.
The display panel may also include a sealant in the non-display portion, with the first and second openings located outside of it. Furthermore, a light-shielding layer can be added to the display panel, with the first and second openings formed in this layer.
Overall, this patent describes a display device with a unique color separation element and specific arrangements of openings in the non-display portion of the display panel. These features allow for precise control and effective separation of colors, enhancing the quality and performance of the display device.
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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.
