This inventor holds 38 USPTO granted patents and 1 published patent application and 9 EPO patents, primarily in Organic Light Emitting Devices. Top assignee: Canon Kabushiki Kaisha. Active years: 2006-2017.
Location History:
- Ichikawa, JP (2006)
- Kanagawa, JP (2006 - 2009)
- Narashino, JP (2016)
- Kawasaki, JP (2008 - 2017)
Company Filing History:
Years Active: 2006-2017
Areas of Expertise:
Title: **Innovative Contributions of Keiji Okinaka in Organic Light Emitting Devices**
Introduction
Keiji Okinaka, a notable inventor based in Kawasaki, Japan, has significantly contributed to the field of organic electronics. With an impressive portfolio of 38 patents, his work primarily focuses on the development of organic light emitting devices (OLEDs), which play a crucial role in modern display technology.
Latest Patents
Okinaka's latest patent involves an innovative organic light emitting device designed to enhance durability during continuous driving. This device comprises an anode, a cathode, and an organic compound layer that includes a hole transport layer and an emission layer. Notably, the emission layer is equipped with a blue light emitting material, and the hole transport layer contains various organic compounds. This design incorporates an organic compound with the lowest ionization potential among those used, ensuring that it remains efficient without absorbing blue light in its radical cation state.
Another recent patent focuses on a blue organic light-emitting device characterized by having an extended continuous operation lifetime. This invention includes a light-emitting layer embedded with a dopant capable of trapping either electrons or holes, alongside a hole-blocking layer or an electron-blocking layer. Key specifications such as the differences in the lowest unoccupied molecular orbital (LUMO) between dopant and host materials, and the highest occupied molecular orbital (HOMO) relationships are precisely defined to enhance performance and longevity.
Career Highlights
Keiji Okinaka has been a vital member of Canon Kabushiki Kaisha, a leading company in imaging and optical products, where he has applied his extensive knowledge and expertise. His innovations in OLED technology have contributed to advancements that improve the efficiency and quality of displays used in various devices, including smartphones, televisions, and lighting solutions.
Collaborations
Throughout his career, Okinaka has collaborated with esteemed colleagues, including Akihito Saitoh and Naoki Yamada. These partnerships have fostered a supportive environment for innovation, allowing them to tackle complex challenges in the field of organic electronics and further refine their inventions.
Conclusion
Keiji Okinaka's contributions to organic light emitting devices signify a remarkable advancement in display technology. With a firm foundation of patents and a commitment to innovation, he continues to influence the future of electronics, enhancing the way we interact with visual media. As technology evolves, Okinaka's insights and creations will undoubtedly lead to even more groundbreaking developments in the field.