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For the Inventor, By the Inventor

Mobara, Japan

Keiichiro Ashizawa

This inventor holds 82 USPTO granted patents and 2 published patent applications, primarily in Liquid Crystal Displays (CPC class G02F1-1343). Top assignees: Hitachi, Ltd., Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.. Active years: 1997-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiichiro Ashizawa. Retrieved from https://idiyas.com/inventor/keiichiro-ashizawa

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

USPTO Granted Patents = 82 

% Patents Active = 58.5

Average Co-Inventor Count = 6.1

ph-index = 22

Forward Citations = 1,657(Granted Patents)

Forward Citations (Not Self Cited) = 1,545(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Tokyo, JP (2004)
  • Chiba-ken, JP (2000 - 2014)
  • Mobara, JP (1997 - 2019)

Company Filing History:

goldMedal65 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal12 out of 1,238 
 
Panasonic Liquid Crystal Display Co., Ltd.
 patents
bronzeMedal9 out of 1,207 
 
Hitachi Displays, Ltd.
 patents
4. 7 out of 5,795 
 
Japan Display Inc.
 patents
5. 1 out of 17 
 
Hiatchi, Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1997-2019

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Areas of Expertise:
Liquid Crystal Display
In-Plane Field Type
Active-Matrix
Semiconductor Layer
Pixel Electrode
Reorientation Directions
High-Melting-Point Metal
Projected Portions
Spacers
Manufacturing Method
Electrode Configuration
Color Filters
82 patents (USPTO):Explore Patents
1. 10371991 - Liquid crystal display device (2019-08-06),
2. 10054826 - Liquid crystal display device (2018-08-21),
3. 9575378 - Liquid crystal display device (2017-02-21),
4. 9069213 - Liquid crystal display device (2015-06-30),
5. 8730443 - Liquid crystal display device (2014-05-20),
6. 8724072 - Liquid crystal display device (2014-05-13),
7. 8704988 - In-plane field type liquid crystal display device comprising liquid crystal molecules with more than two kinds of reorientation directions (2014-04-22),
8. 8427613 - In-plane field type liquid crystal display device comprising liquid crystal molecules with more than two kinds of reorientation directions (2013-04-23),
9. 8405813 - Liquid crystal display device (2013-03-26),
10. 8358394 - Liquid crystal display (2013-01-22),
11. 8233126 - Liquid crystal display device with semiconductor layer of TFT and pixel electrode at different levels (2012-07-31),
12. 8154698 - In-plane field type liquid crystal display device comprising liquid crystal molecules with more than two kinds of reorientation directions (2012-04-10),
13. 8027005 - Liquid crystal display having a pixel region with a source electrode of at least a high-melting-point metal layer (2011-09-27),
14. 7956973 - In-plane field type liquid crystal display device comprising liquid crystal molecules with more than two kinds of reorientation directions (2011-06-07),
15. 7872725 - Liquid crystal display device (2011-01-18),

As an AI assistant specializing in innovations, inventions, inventors, patent attorneys, assignees, and patents, I can provide information on inventor Keiichiro Ashizawa for your article.

Title: Keiichiro Ashizawa: Pioneering Inventor in Display Technology

Introduction: Keiichiro Ashizawa, a visionary inventor hailing from Mobara, JP, is renowned for his groundbreaking contributions to display technology, with an impressive portfolio of 82 patents.

Latest Patents: Ashizawa's recent patents include innovative liquid crystal display devices designed with advanced features such as columnar spacers of equal height, optimizing the visual performance and efficiency of the displays.

Career Highlights: Throughout his career, Ashizawa has played pivotal roles in renowned companies such as Hitachi, Ltd. and Panasonic Liquid Crystal Display Co., Ltd., where his expertise and creativity have led to significant advancements in the field of display technology.

Collaborations: Ashizawa has collaborated closely with esteemed colleagues like Kazuhiko Yanagawa and Masuyuki Ohta, pooling their talents and dedication to drive innovation and enhance the quality of their inventions.

Conclusion: Keiichiro Ashizawa's unwavering passion for innovation and his relentless pursuit of excellence have solidified his reputation as a trailblazing inventor in the realm of display technology, leaving a profound impact on the industry and inspiring generations of inventors to come.

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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