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For the Inventor, By the Inventor

Hatogaya, Japan

Kazumasa Ohsumi

This inventor holds 7 USPTO granted patents. Top assignees: Enplas Corporation, Other. Active years: 2000-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazumasa Ohsumi. Retrieved from https://idiyas.com/inventor/kazumasa-ohsumi

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

USPTO Granted Patents = 7

% Patents Active = 85.7

Average Co-Inventor Count = 1.4

ph-index = 5

Forward Citations = 149(Granted Patents)


Location History:

  • Kawaguchi, JP (2000)
  • Hatogaya, JP (2003 - 2005)
  • Saitama, JP (2006)

Company Filing History:

goldMedal7 out of 772 
 
Enplas Corporation
 patents
silverMedal1 out of 834,570 
Other
 patents
where one patent can have more than one assignee

Years Active: 2000-2006

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7 patents (USPTO):Explore Patents
1. 7133091 - Liquid crystal display panel, liquid crystal display device and composite optical element (2006-11-07),
2. 6930735 - Surface light source device of side light type and liquid crystal display (2005-08-16),
3. 6816214 - Guide plate, surface light source device of side light type and liquid crystal display (2004-11-09),
4. 6791635 - Surface light source device of side light type and liquid crystal display (2004-09-14),
5. 6663254 - Light guide plate, surface light source device and display (2003-12-16),
6. 6612710 - Surface light source device, display and light guide plate (2003-09-02),
7. 6104854 - Light regulator and surface light source device (2000-08-15),

Title: Kazumasa Ohsumi: Innovator in Liquid Crystal Display Technology

Introduction

Kazumasa Ohsumi is a prominent inventor known for his contributions to liquid crystal display (LCD) technology. He is based in Hatogaya, Japan, and holds a total of 7 patents in this field. His innovative work has significantly impacted the development of display technologies used in various electronic devices.

Latest Patents

Ohsumi's latest patents include advancements in liquid crystal display panels, liquid crystal display devices, and composite optical elements. One of his notable inventions involves an LCD panel mounted on a surface light source device that outputs an oblique preferential emission. This technology utilizes a scattering pattern formed on the emission face to enhance light directionality. The back face of the device features a light control face that corrects directivity toward a frontal direction, ensuring optimal light output. Additionally, his designs incorporate a prism sheet that works in conjunction with a polarization film, allowing for improved light transmission and control.

Career Highlights

Throughout his career, Kazumasa Ohsumi has worked with various companies, including Enplas Corporation. His experience in the industry has allowed him to refine his skills and contribute to significant advancements in display technology. His work has been recognized for its innovative approach to enhancing the performance of liquid crystal displays.

Collaborations

Ohsumi has collaborated with notable colleagues such as Shingo Ohkawa and Kayoko Masaki. These partnerships have fostered a creative environment that has led to the development of cutting-edge technologies in the field of liquid crystal displays.

Conclusion

Kazumasa Ohsumi's contributions to liquid crystal display technology have made a lasting impact on the industry. His innovative patents and collaborations with other professionals highlight his dedication to advancing display technologies. Ohsumi's work continues to influence the way we interact with electronic devices today.

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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