Hajime Ishihara

Title: Hajime Ishihara - Innovator in Electroluminescent Display Technology

Introduction

Hajime Ishihara is a prominent inventor based in Nagoya, Japan, known for his innovative contributions to the field of display technology. With a substantial portfolio of 10 patents, Ishihara has made significant advancements in the development of self-luminous and multi-color display devices.

Latest Patents

His latest patents include groundbreaking technologies such as a self-luminous display device that features an inorganic electroluminescent (EL) element light emission unit located between electrodes. This device consists of emission pixels that are formed by sandwiching an emission layer between first and second electrodes through insulator layers. The unique design permits holes to be opened and arranged regularly in at least one of the electrodes, with sizes that may be equal to or smaller than 50 micrometers, and even less than 20 micrometers. This innovative approach enables the self-luminous display device to operate with low power consumption.

Another notable patent is the multi-color electroluminescent display panel, capable of selectively displaying different colors by varying the voltage level applied. The panel is constructed with a first luminescent layer that emits green light and a second luminescent layer emitting orange light, laminated directly on top of each other without an intermediate electrode. The design allows for a single layer portion emitting green light at a low voltage level, while the double layer portion emits lemon light at a high luminance under higher voltage, making it suitable for use as an instrument panel in automobiles. This innovative display can be adapted for optimal visibility both day and night.

Career Highlights

Hajime Ishihara has worked with reputable companies, including Nippondenso Co., Ltd. and Denso Corporation. His roles within these organizations have allowed him to further his expertise and bring his inventive ideas to life, contributing significantly to advancements in display technology.

Collaborations

Throughout his career, Ishihara has collaborated with other skilled inventors, including notable coworkers Nobuei Ito and Tadashi Hattori. Their combined efforts in research and development have fostered an environment of creativity and innovation, leading to impactful technological advancements.

Conclusion

Hajime Ishihara stands out as an influential figure in the innovation of display technologies, with a focus on self-luminous and multi-color devices. His impressive patent portfolio and collaborative spirit within the industry continue to inspire future advancements in display technology.