This inventor holds 30 USPTO granted patents and 2 published patent applications, primarily in Organic Electronics. Top assignees: Canon Kabushiki Kaisha, Kabushiki Kaisha Toshiba, Kabushiki Kaishi Toshiba. Active years: 1999-2014.
Location History:
- Saitama-ken, JP (2004 - 2006)
- Fukaya, JP (1999 - 2007)
- Sagamihara, JP (2007 - 2012)
- Kawasaki, JP (2010 - 2013)
- Chiba, JP (2012 - 2014)
Company Filing History:
19 out of 92,842Â 
9 out of 53,240Â 
1 out of 35Â Years Active: 1999-2014
Areas of Expertise:
Title: Innovations by Kohei Nagayama: A Pioneer in Organic Light-Emitting Devices
Introduction
Kohei Nagayama, an accomplished inventor based in Kawasaki, Japan, holds an impressive portfolio of 30 patents. His innovative work primarily focuses on organic light-emitting devices (OLEDs), which play a crucial role in modern display technology. Nagayama's inventions enhance the performance and durability of OLEDs, reflecting his commitment to advancing this field.
Latest Patents
Among his most recent patents, Nagayama has developed an organic light-emitting device designed to suppress the deterioration of organic electroluminescent (EL) elements at the corners of the emission region. This invention features a planarization film that smooths out thin film transistors in the emission region, along with an element separation film defining the pixels above it. The device incorporates a charge transport layer containing alkali and alkaline-earth metals that extends beyond the emission region to envelop the side surface of the planarization film.
Additionally, Nagayama has contributed to the development of an organic electro-luminescent display apparatus and imaging apparatus, which effectively prevents light emission from areas overlapping a contact hole in stacked light-emitting devices. This stacked apparatus integrates a contact hole connecting an electrode to a driving circuit, ensuring functionality while maintaining light quality.
Career Highlights
Throughout his career, Kohei Nagayama has made significant contributions while working with esteemed companies such as Canon and Toshiba. His involvement with these industry leaders has propelled advancements in display technology, positioning him as a key figure in the realm of organic light-emitting devices.
Collaborations
Nagayama has collaborated with notable coworkers, including Yasuyuki Hanazawa and Takuro Yamazaki. Together, they have engaged in projects that further innovative advancements, enhancing the efficacy and adaptability of OLED technology in various applications.
Conclusion
Kohei Nagayama's extensive work in the field of organic light-emitting devices has led to remarkable innovations that improve the overall performance of displays. His dedication to research and development is evident in his numerous patents, making him a significant contributor to advancements in technology. As OLED technology continues to evolve, innovators like Nagayama play a vital role in shaping its future.