Company Filing History:
9 out of 25,543 
1 out of 980 
Years Active: 1982-1990
Title: The Innovations of Zempei Tani
Introduction
Zempei Tani, an esteemed inventor hailing from Tondabayashi, Japan, has made significant contributions to the field of optical technologies. With a remarkable portfolio of nine patents, Tani has developed groundbreaking inventions that enhance functionality and performance in various applications.
Latest Patents
Among his latest innovations is an **optical rotary encoder** that employs multiple photosensors arranged in a square configuration. This innovative device incorporates four photosensor elements, where a first pair of diagonally aligned photosensors generates output signals that are inversely phased with respect to each other as the slit plate rotates. These signals are processed by a comparator to produce the first control signal. Similarly, the second pair of photosensors provides another control signal, optimizing performance in rotary applications.
Another notable patent is the **semiconductor color sensor detection circuit**. This circuit utilizes two photodiodes with distinct wavelength sensitivity characteristics. Tani's design includes a clever adjustment of the transistors responsible for logarithmic compression of signals, enabling the circuit to minimize voltage output errors caused by temperature fluctuations. This innovation significantly enhances the dynamic range of the illuminance of incident light, showcasing Tani's commitment to advancing optical technologies.
Career Highlights
Zempei Tani's career includes working with prominent companies such as **Sharp Corporation** and **Brother Industries, Ltd.** His tenure at these leading organizations has allowed him to refine his skills and contribute to various state-of-the-art projects, paving the way for his remarkable inventions.
Collaborations
Throughout his career, Tani has collaborated with esteemed colleagues like **Toshihumi Yoshikawa** and **Akira Aso**. Their shared expertise and innovative spirit have further propelled Tani's inventiveness, leading to impactful advancements in the technology sector.
Conclusion
Zempei Tani's inventive journey is a testament to his dedication and ingenuity in the realm of optical technologies. With nine patents to his name, his latest inventions continue to influence the industry and demonstrate the importance of innovation in driving technological progress. Tani's work not only enhances existing technologies but also sets the stage for future developments in the field.