Tadahisa Yoshida

Title: **The Innovations of Inventor Tadahisa Yoshida**

Introduction

Tadahisa Yoshida, an accomplished inventor based in Nagaoka, Japan, has made significant contributions to the field of electron gun technology. With a total of three patents to his name, his work has had a profound impact on image display devices and color cathode-ray tubes.

Latest Patents

Yoshida's latest patents include two notable inventions: "Electron gun having improved focus and convergence" and "In-line type electron gun." The first patent describes an electron gun system where each pair of convergence electrodes is strategically positioned within a focusing electrode. This design utilizes an alternating current voltage synchronized with a deflection current, applying forces to the side beams, enabling them to diverge near the screen's edge. This innovation ensures that the converging point of the electron beams is accurately placed on the screen, improving the focusing function of the main electron lens.

The second patent focuses on the in-line type electron gun, which features a unique design with three lens holes arranged in a line. The central lens hole's diameter is smaller than the other two, allowing for more uniform focus voltages across the beams and enhancing the beam spot shapes. This advancement represents a significant leap forward from prior technologies.

Career Highlights

Throughout his career, Tadahisa Yoshida has worked with prominent companies, including Mitsubishi Electric Corporation and Fuji Telecasting Co., Ltd. His contributions to these organizations have played a vital role in advancing display technologies, particularly in electron gun designs that optimize image quality.

Collaborations

Yoshida has collaborated with esteemed colleagues such as Yutaka Takano and Koji Yajima. Their combined expertise and innovative spirit have fueled the development of groundbreaking technologies within the electron optics field.

Conclusion

Tadahisa Yoshida stands out as a notable inventor in the realm of electron gun technology, with a keen focus on improving the precision and functionality of image display devices. His patented inventions reflect a deep understanding of the complexities involved in electron beam management, making significant strides towards enhanced visual experiences in electronic displays.