Aviation Industry Corp of China has been granted a patent for a birefringence film featuring multiple layers of hybrid-aligned liquid crystalline polymer. The film ensures identical alignment and tilt angles, resulting in a distinct exit position for extraordinary light compared to ordinary light. GlobalData’s report on Aviation Industry Corp of China 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 Aviation Industry Corp of China, Smart factory applications was a key innovation area identified from patents. Aviation Industry Corp of China's grant share as of June 2024 was 61%. Grant share is based on the ratio of number of grants to total number of patents.
Birefringence film with aligned liquid crystalline polymer layers
The granted patent US12044873B2 introduces a novel birefringence film composed of multiple birefringence layers that utilize a hybrid-aligned liquid crystalline polymer. These layers are meticulously stacked to ensure that both the alignment directions and the tilt angles of the liquid crystal polymer are uniform across the film. A key feature of this design is the distinct exit positions for extraordinary and ordinary light, which results in a shift in the light's path as it exits the film. The patent also describes the inclusion of a protective layer between the birefringence layers, enhancing the film's durability and performance.
In addition to the birefringence film, the patent outlines a display device that incorporates this film alongside a display panel featuring an array of pixels. A polarization switching element is strategically placed between the display panel and the birefringence film, enabling the switching of light between two orthogonal polarization states. This configuration allows the display device to emit both ordinary and extraordinary light through the birefringence film, optimizing the visual output. The claims further detail the structure of the pixels, which consist of subpixels capable of emitting different colors, and provide specific parameters related to the optical properties of the liquid crystalline polymer, such as refractive indices and tilt angles. This innovative approach aims to enhance display technology by improving light manipulation and color rendering.
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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.
