This inventor holds 1 USPTO granted patent. Top assignee: Hitachi, Ltd.. Active years: 2005.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2005
Title: Hiroshi Tanigaki and His Halftone Processing Invention.
Introduction
Hiroshi Tanigaki is an inventor associated with Hadano, Japan, and Hitachi, Ltd. His work includes an image-processing invention for laser printing that combines pulse-width modulation with clustered-dot halftone processing.
Latest Patents
The provided information lists one patent for Tanigaki: “Halftone Processing Apparatus Using Distributing PWM Method.” The invention applies laser pulse modulation (PWM) alongside distributed clustered-dot halftone processing, spreading tone levels across four clustered dots. In highlight areas, higher bits of a threshold value switch the PWM pulse pattern to a discontinuous pattern. This approach is designed to achieve high-density halftone processing with strong highlight tone density and stability, using relatively little memory and circuitry. Tanigaki is credited with 1 patent.
Career Highlights
Tanigaki’s listed patent reflects work on practical image-processing techniques for laser printers. Its design addresses the challenge of producing stable, detailed highlights while keeping the apparatus’s memory and circuit requirements modest. The provided information associates him with Hitachi, Ltd.
Collaborations
Takeshi Shibuya and Mieko Ishii are identified as Tanigaki’s coworkers. The available details do not specify their roles in the patent or the nature of their collaboration.
Conclusion
Hiroshi Tanigaki’s listed invention combines PWM control and distributed clustered-dot processing to improve highlight halftones in laser printing while limiting hardware demands.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile