Tsuneo Sekiguchi

Title: Tsuneo Sekiguchi: Innovator in Lighting Technology

Introduction

Tsuneo Sekiguchi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of lighting technology, holding a total of 8 patents. His innovative designs focus on enhancing the efficiency and functionality of lighting devices.

Latest Patents

One of Sekiguchi's latest patents is a surface light source device and LCD unit. This device features a local dimming function and includes a light guide with a top surface that has multiple linear convexes and a bottom surface with various dots. It also incorporates a reflective sheet adjacent to the bottom surface, a prism sheet next to the top surface, and a diffusing sheet located adjacent to the prism sheet. Additionally, it has a pair of LED light sources positioned next to both light incident surfaces of the light guide, divided into several groups. Each group emits light independently from specific local domains on the light-emitting surface, providing a simple structure similar to conventional edge light type devices.

Another notable patent is a projector type lighting device. This device features a cutout portion at the lower part of a reflective mirror, which corresponds to a section of the light beam reflected from the mirror and shaded by a shading plate. It includes a first reflective plane made up of left-hand and right-hand reflective plane halves, designed to converge a large portion of the light beam emitted directly from the light source in the vertical direction. A second reflective plane is positioned behind the first to further reflect the light beam, enhancing the light irradiating performance of the projector type lighting device. To increase the light intensity, a third reflective plane in the form of a concave parabolic surface is recommended at the joint zone of the first reflective plane.

Career Highlights

Throughout his career, Tsuneo Sekiguchi has worked with notable companies such as Stanley Electric Co., Ltd and Honda Giken Kogyo Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in lighting technology and innovation.

Collaborations

Sekiguchi has collaborated with talented individuals in the field, including Satoru Suzuki and Koichi Nagano. These partnerships have fostered a creative environment that has led to the development of advanced lighting solutions.

Conclusion

Tsuneo Sekiguchi is a distinguished inventor whose work in lighting technology has