Seiko Epson has patented a liquid ejection head with two piezoelectric elements receiving different drive signals. The apparatus includes a flexible flat cable for signal transmission. The drive signals transition between potentials in specific periods, ensuring efficient liquid ejection. GlobalData’s report on Seiko Epson 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 Seiko Epson, E-transaction user interfaces was a key innovation area identified from patents. Seiko Epson's grant share as of May 2024 was 41%. Grant share is based on the ratio of number of grants to total number of patents.
Liquid ejection head with overlapping drive signals for piezoelectric elements
A recently granted patent (Publication Number: US12011924B2) discloses a liquid ejection apparatus and a capacitive load drive circuit. The apparatus comprises a head unit with piezoelectric elements actuated by drive signals, and a flexible flat cable for electrical connections. The drive signals transition between different potentials in specific periods, with wiring configurations ensuring proper potential maintenance and actuation of the piezoelectric elements. The apparatus includes additional features like switches for control and detection units for monitoring vibrations. The capacitive load drive circuit operates similarly to the liquid ejection apparatus, emphasizing the precise timing and potential differences required for efficient operation.
Moreover, the patent details a liquid ejection apparatus with multiple ejection units, each comprising piezoelectric elements, pressure chambers, and nozzles for liquid ejection. The drive signals control the actuation of the piezoelectric elements to manipulate the volume of the pressure chambers and eject liquid through the nozzles. The timing and potential differences in the drive signals ensure that liquid ejection is controlled and synchronized between the different ejection units. This innovative technology offers a sophisticated solution for precise liquid ejection applications, with potential applications in various industries requiring controlled liquid dispensing mechanisms.
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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.
