Hiroyasu Kisaichi

Title: Innovations of Hiroyasu Kisaichi

Introduction

Hiroyasu Kisaichi is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of lighting technology, holding a total of five patents. His work focuses on high pressure discharge lamps, which are essential in various lighting applications.

Latest Patents

Kisaichi's latest patents include a high pressure discharge lamp lighting apparatus and a high pressure discharge lamp lighting method. The high pressure discharge lamp lighting apparatus is designed to prevent the dying out or instabilities of the discharge arc inside the arc tube due to acoustic resonance phenomena. This innovation enables the high pressure discharge lamp to operate in a steady state. The apparatus features a lamp voltage detecting device, a high frequency power supplying device, and a control circuit. It also includes an extracting device that identifies the upper and lower limit frequencies of the resonance-free frequency band. The control circuit is equipped with a frequency moving device that adjusts the high frequency power within the defined range, ensuring optimal performance.

Another significant patent is the discharge lamp lighting apparatus, which incorporates a step-up/step-down converter with a transformer. This apparatus includes a first switching element connected to the transformer, a zero-cross detection means for voltage detection, and a supplemental power circuit. The control circuit operates the second switching element based on the output from the voltage zero-cross detection means, enhancing the efficiency of the discharge lamp.

Career Highlights

Kisaichi has worked with prominent companies such as Mitsubishi Denki Kabushiki Kaisha and Mitsubishi Electric Lighting Corporation. His experience in these organizations has contributed to his expertise in lighting technology and innovation.

Collaborations

Throughout his career, Kisaichi has collaborated with notable colleagues, including Masatomi Asayama and Fumitake Oowada. These partnerships have fostered a creative environment that has led to advancements in lighting solutions.

Conclusion

Hiroyasu Kisaichi's contributions to the field of lighting technology through his innovative patents demonstrate his commitment to enhancing the efficiency and reliability of high pressure discharge lamps. His work continues to influence the industry and inspire future innovations.