Company Filing History:

13 out of 42,535

Hitachi, Ltd.

patents

1 out of 1

Hitachi, Ltd., and Hitachi Video and Information Systems, Inc.

patent

3 out of 833,002

Other

patents

Years Active: 1989-2006

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7152978 - Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same (2006-12-26),

2. 6824273 - Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same (2004-11-30),

3. 6783245 - Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same (2004-08-31),

4. 6416182 - Projection type liquid crystal display device (2002-07-09),

5. 6290360 - Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same (2001-09-18),

6. 6062695 - Projection type liquid crystal display device (2000-05-16),

7. 5805312 - Thermographical image copier system with real time copying and variable (1998-09-08),

8. 5259680 - Thermal transfer printer and ink sheet cassette for use in same (1993-11-09),

9. 5251074 - Method and apparatus for controlling a video signal print system (1993-10-05),

10. 5168287 - Platen locking mechanism for thermal transfer recording apparatus (1992-12-01),

11. 5079565 - Thermal transfer printing apparatus and ink paper cassette (1992-01-07),

12. 5037218 - Thermal transfer printer capable of using and detecting a plurality of (1991-08-06),

13. D314005 - Ink ribbon cassette (1991-01-22),

14. 4915516 - Thermal transfer recording apparatus with ink paper cassette (1990-04-10),

15. 4901090 - Inked sheet cassette and thermal transfer-type recording apparatus (1990-02-13),

Title: Naohiro Ozawa: A Pioneer in Liquid Crystal Projection Technology

Introduction

Naohiro Ozawa is a prominent inventor based in Yokohama, Japan, recognized for his significant contributions to the field of optical technology. With an impressive portfolio of 17 patents, Ozawa has made a lasting impact on liquid crystal projector systems and optical components.

Latest Patents

Among his latest innovations are patents related to a liquid crystal projector and a projection lens unit with an advanced optical unit and cooling system. This liquid crystal projector features an illuminating optical system that includes a light source and a color-separating optical system. The system efficiently separates illuminating light rays into three distinct colors, enhancing overall projection quality. The projection lens unit comprises a precision projection lens and a cross dichroic prism located near the light receiving end. Surrounding the prism are multiple liquid crystal panels, engineered for optimal display performance. Designed with a compact footprint of 263 mm by 318 mm, the projector also includes a dedicated light source power supply and a cooling fan strategically placed to manage the temperature of the liquid crystal panels.

Career Highlights

Throughout his career, Naohiro Ozawa has worked with notable companies, including Hitachi, Ltd., where he honed his skills in technological innovation and product development.

Collaborations

Ozawa's work has been enriched through collaborations with esteemed colleagues such as Toshihiko Gotoh and Hiroshi Shimizu. Together, they have pushed the boundaries of optical technology, collectively contributing to significant advancements in the field.

Conclusion

Naohiro Ozawa stands out as a key figure in the realm of liquid crystal projector technology, exemplifying the spirit of innovation in modern engineering. His numerous patents and professional collaborations have laid the groundwork for future advancements and have impacted how we experience visual media today.

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