Hiroichi Murakami

Title: Hiroichi Murakami: Inventor in LED Optics

Introduction

Hiroichi Murakami is an inventor associated with Osaka, Japan, and Sumitomo Electric Industries, Limited. His work includes a patented method for mounting a lens on a light-emitting diode (LED). He is credited with 1 patent.

Latest Patents

Murakami’s patent, “Method of Mounting a Lens on a Light Emitting Diode,” describes a process for accurately positioning a lens on a rear-surface-emitting LED. The method first examines the chip while it emits light, using a camera to measure the light-power distribution across individual pixels and determine the center of the light-emitting region.

A movable XY-stage then aligns that center with the camera and transfers the chip to a dispenser, which applies ultraviolet-curable resin. The stage moves the chip beneath a vacuum collet holding a lens, and the collet places the lens onto the resin. Ultraviolet light hardens the resin, securing the lens to the chip. This alignment process is designed to position the lens directly over the LED’s narrow light-emitting region.

Career Highlights

Murakami’s documented patent work focuses on LED packaging and optical alignment. The described method combines camera-based measurement, controlled stage movement, resin dispensing, and lens placement to support precise assembly.

Collaborations

Masayuki Nishikawa and Mitsutoshi Kamakura are listed as Murakami’s coworkers. His company affiliation is Sumitomo Electric Industries, Limited.

Conclusion

Hiroichi Murakami’s patent presents a coordinated method for aligning and attaching a lens to a rear-surface-emitting LED, reflecting his contribution to optical-device manufacturing.