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For the Inventor, By the Inventor

Hiratsuka, Japan

Katsumi Kurematsu

This inventor holds 74 USPTO granted patents and 2 EPO patents, primarily in Liquid Crystal Displays (CPC class 359 ). Top assignee: Canon Kabushiki Kaisha. Active years: 1987-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsumi Kurematsu. Retrieved from https://idiyas.com/inventor/katsumi-kurematsu

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 74

% Patents Active = 87.8


Average Co-Inventor Count = 2.5

ph-index = 25

Forward Citations = 1,770(Granted Patents)

Forward Citations (Not Self Cited) = 1,721(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Atsugi, JP (1995)
  • Kawasaki, JP (1987 - 1998)
  • Kanagawa-ken, JP (2004 - 2005)
  • Kanagawa, JP (2003 - 2006)
  • Tokyo, JP (2005 - 2006)
  • Hiratsuka, JP (1998 - 2014)

Company Filing History:

goldMedal74 out of 93,085 
 
Canon Kabushiki Kaisha
 patents

Years Active: 1987-2014

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Areas of Expertise:
Liquid Crystal Display
Matrix Substrate
Projection Apparatus
Display Device
Optical System
Semiconductor Device
Micro-Lens Array
Manufacturing Process
Image Display
Backlight Device
Active Matrix
Reflective LCD
74 patents (USPTO):Explore Patents
1. 8766897 - Matrix substrate and display which inputs signal-polarity inverting signals to picture data (2014-07-01),
2. 6994442 - Display apparatus (2006-02-07),
3. 6991338 - Projection optical system, projection type image display apparatus, and image display system (2006-01-31),
4. 6984044 - Projection optical system, projection type image display apparatus, and image display system (2006-01-10),
5. 6951395 - Projection optical system, projection type image display apparatus, and image display system (2005-10-04),
6. 6927829 - Matrix substrate, liquid crystal display device using it, and method for producing the matrix substrate (2005-08-09),
7. 6923546 - Projection optical system and projection type display apparatus using the same (2005-08-02),
8. 6894842 - Projection optical system, image display apparatus, and image display system (2005-05-17),
9. 6883922 - Display apparatus (2005-04-26),
10. 6809790 - Matrix substrate, liquid crystal display device using it, and method for producing the matrix substrate (2004-10-26),
11. 6808271 - Projection type display apparatus (2004-10-26),
12. 6712473 - Mirror array device and projection type display apparatus using the same (2004-03-30),
13. 6650460 - Projection type display apparatus (2003-11-18),
14. 6592227 - Projection type image-display apparatus (2003-07-15),
15. 6563562 - Liquid crystal panel with holding substrate having fixing protuberances (2003-05-13),

Title: Katsumi Kurematsu: Innovator in Display Technology

Introduction

Katsumi Kurematsu is a renowned inventor based in Hiratsuka, Japan, who has made significant contributions to the field of display technology. With an impressive portfolio of 74 patents, Kurematsu’s work primarily focuses on enhancing visual display systems and liquid crystal devices, showcasing his commitment to innovation.

Latest Patents

Among Kurematsu's latest patents is the invention of a matrix substrate and display that processes signal-polarity-inverting signals to picture data. This matrix substrate comprises multiple switching elements arranged in a grid corresponding to scanning lines and signal lines, alongside picture element electrodes connected to these elements. The technology includes horizontal and vertical circuits designed for signal input, featuring a horizontal scanning circuit that samples picture data based on digital signals and a D/A converter that transforms latch circuit outputs into analog signals. His patent also describes a display apparatus aimed at delivering high-quality, large-screen displays while ensuring optimal light beam reception angles and minimal distortion (1.2% or less) via an advanced projection optical system with aspherical curved mirrors.

Career Highlights

Katsumi Kurematsu has established himself as a key figure at Canon Kabushiki Kaisha, a leading technology company known for its innovation in imaging and optical products. His extensive research and development efforts have played a crucial role in advancing display technology, ultimately enhancing user experiences in various applications.

Collaborations

Throughout his career, Kurematsu has collaborated with notable professionals in his field, including Osamu Koyama and Nobuo Minoura. These collaborations have facilitated the exchange of ideas and fostered a rich environment for innovation, contributing to the development of cutting-edge technologies.

Conclusion

Katsumi Kurematsu's contributions to display technology exemplify the spirit of innovation that drives progress in the industry. With his impressive collection of patents and collaborations with esteemed colleagues, Kurematsu continues to push the boundaries of what is possible in visual display systems, solidifying his legacy as a pioneering inventor.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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