Akira Tooyama

Title: Akira Tooyama: Patents in Color Television Technology.

Introduction

Akira Tooyama is an inventor associated with Sony Corporation in Tokyo, Japan. His patent work includes technologies for controlling electron-beam scanning and deflection in beam-index color cathode-ray tubes. The supplied information lists 5 patents.

Latest Patents

Two of Tooyama’s latest patents concern maintaining accurate beam scanning in color television displays.

“Horizontal Scanning Rate Correction Apparatus” describes a system that stores correction values and adjusts the scanning rate to compensate for changes in the high voltage supplied to a cathode-ray tube. Its correcting circuitry accounts for both voltage fluctuations and their rate of change, helping keep the electron beam’s horizontal scanning rate close to its desired value.

“Deflection Control Apparatus for a Beam Index Color Cathode Ray Tube” describes a feedback system for a beam-index color television receiver. The apparatus detects index stripes scanned by the electron beam, compares the resulting index signal with an oscillator signal, and uses the phase-locked loop’s control signal to adjust beam deflection. This helps maintain a substantially constant scanning speed.

Career Highlights

Tooyama’s listed patents address practical challenges in cathode-ray tube display systems, including scanning-rate variation and precise beam deflection. The inventions combine sensing, signal processing, and feedback control to improve the consistency of color television operation.

Collaborations

The supplied information identifies Sony Corporation as Tooyama’s company and lists Takashi Hosono and Takashi Tooyama as coworkers. It does not specify their roles in the patents or describe particular collaborations.

Conclusion

Akira Tooyama’s listed inventions reflect a focus on feedback and correction technologies for beam-index color television displays, with patent work associated with Sony Corporation.