Hiromu Itoh

Title: **The Innovative Mind of Hiromu Itoh: Revolutionizing Switching Circuits and Motor Control**

Introduction

Hiromu Itoh, an accomplished inventor based in Nara, Japan, has made significant contributions to the field of electrical engineering. With a portfolio of two patents, Itoh has focused on developing technologies that enhance the efficiency and control of electrical devices. His innovations are pivotal in improving everyday applications, such as lighting systems and motor control mechanisms.

Latest Patents

Among his noteworthy inventions is the **Light Sensitive Switching Circuit**. This circuit is designed to automatically regulate the supply of electric power from a source to a load, such as lanterns, based on ambient light conditions. The functionality ensures that when the surroundings become darker than a set brightness, the power supply activates. Conversely, once the environment brightens, the power supply is interrupted. This intelligent design incorporates a first and second line connecting the power source and load, with a first thyristor and a second thyristor, in addition to a photocell that links to the gate of the second thyristor.

Another key invention by Itoh is the **Digitalized Position Control for a D.C. Motor**. This control system enhances D.C. motor operation by enabling two distinct modes: motor speed detection and motor position detection. Utilizing a rotary encoder, the system generates a near sinusoidal position signal corresponding to the motor's rotation. A waveform shaping circuit then processes this signal into a rectangular digital format, allowing an effective comparison with a speed instruction pulse signal through a phase comparator, thus providing precise control in a phase-locked loop (PLL) style.

Career Highlights

Hiromu Itoh is currently associated with Sharp Kabushiki Kaisha Corporation, a leading company known for its innovative electronic products. His role at Sharp has allowed him to work on cutting-edge technologies in the realm of electrical engineering and control systems, contributing to the company's reputation for excellence.

Collaborations

Throughout his career, Itoh has collaborated with fellow innovators such as Kenji Hachimura and Zempei Tani. These partnerships have fostered a creative environment, allowing for the sharing of ideas and collective problem-solving, which are essential in driving technological advancements.

Conclusion

In summary, Hiromu Itoh's contributions to electrical engineering through his patents and collaborations highlight his role as a pivotal figure in innovation. His inventions, which include a light-sensitive switching circuit and a digitalized position control system, not only showcase his technical acumen but also promise to enhance the functionality and efficiency of electrical devices in everyday life.