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For the Inventor, By the Inventor

Yokohama, Japan

Hiroshi Ohtaka

USPTO Granted Patents = 14

Average Co-Inventor Count = 4.8

ph-index = 9

Forward Citations = 222(Granted Patents)


Location History:

  • Yokohama, JP (1998 - 2004)
  • Kawasaki, JP (2004 - 2005)

Company Filing History:

goldMedal12 out of 42,485 
 
Hitachi, Ltd.
 patents
silverMedal2 out of 180 
 
Fujitsu Hitachi Plasma Display Limited
 patents

Years Active: 1998-2005

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14 patents (USPTO):Explore Patents
1. 6940559 - Color reproduction correction circuit for color representation and a color display (2005-09-06),
2. 6753930 - Color reproduction correction circuit for color representation and a color display (2004-06-22),
3. 6741227 - Color image display apparatus and method (2004-05-25),
4. 6518977 - Color image display apparatus and method (2003-02-11),
5. 6504310 - Display apparatus (2003-01-07),
6. 6407506 - Display apparatus, display method and control-drive circuit for display apparatus (2002-06-18),
7. 6404411 - Display panel driving method and discharge type display apparatus (2002-06-11),
8. 6281863 - Plasma display panel driving system and method (2001-08-28),
9. 6208467 - Display apparatus for displaying an image having gradation (2001-03-27),
10. 6151000 - Display apparatus and display method thereof (2000-11-21),
11. 6014258 - Color image display apparatus and method (2000-01-11),
12. 5939826 - Plasma display system (1999-08-17),
13. 5889501 - Plasma display apparatus and method of driving the same (1999-03-30),
14. 5818168 - Gas discharge display panel having communicable main and auxiliary (1998-10-06),

Title: Hiroshi Ohtaka: Innovator in Color Reproduction Technology

Introduction

Hiroshi Ohtaka is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of color reproduction technology, holding a total of 14 patents. His work focuses on correcting color distortion in displays, enhancing the accuracy of color representation.

Latest Patents

Ohtaka's latest patents include a color reproduction correction circuit designed for color representation and display. This innovative circuit addresses the color distortion that occurs when color signals using one combination of primary colors are reproduced in a display utilizing a different combination. The circuit generates a mixed color signal by multiplying the original color signal by specified coefficients and adding it to other color signals. The coefficients are determined to align the mixed color light sources with the primary color light sources of the original combination. Additionally, the luminescent chromaticity values of the primary colors are corrected to match the specified chromaticity values of the signal system.

Career Highlights

Throughout his career, Hiroshi Ohtaka has worked with notable companies such as Hitachi, Ltd. and Fujitsu Hitachi Plasma Display Limited. His experience in these organizations has allowed him to develop and refine his expertise in color display technologies.

Collaborations

Ohtaka has collaborated with esteemed colleagues, including Michitaka Ohsawa and Kazutaka Naka. Their joint efforts have contributed to advancements in the field of color reproduction.

Conclusion

Hiroshi Ohtaka's innovative work in color reproduction technology has significantly impacted the industry. His patents and collaborations reflect his dedication to enhancing color accuracy in displays.

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