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For the Inventor, By the Inventor

Neyagawa, Japan

Yoshichika Hirao

This inventor holds 12 USPTO granted patents, plus 1 CIPO patent. Top assignee: Sanyo Electric Co., Ltd.. Active years: 1990-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshichika Hirao. Retrieved from https://idiyas.com/inventor/yoshichika-hirao

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

USPTO Granted Patents = 12

% Patents Active = 75.0


Average Co-Inventor Count = 2.4

ph-index = 4

Forward Citations = 77(Granted Patents)


Location History:

  • Neyagawa, JP (1990 - 2008)
  • Osaka, JP (1991 - 2008)

Company Filing History:

goldMedal12 out of 8,782 
 
Sanyo Electric Co., Ltd.
 patents

Years Active: 1990-2008

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12 patents (USPTO):Explore Patents
1. 7384157 - Projection type video display (2008-06-10),
2. 7370980 - Projection type video display (2008-05-13),
3. 7156524 - Projection type video display and method of adjusting the same at factory shipping (2007-01-02),
4. 6843569 - Projection type display device (2005-01-18),
5. 6709111 - Cooling fan controller and liquid crystal projector (2004-03-23),
6. 6587139 - Device for measuring period of synchronizing signal and display device (2003-07-01),
7. 5351091 - Burst phase correcting circuit (1994-09-27),
8. 5153714 - Circuit for removing jitter of chrominance signal and television set (1992-10-06),
9. 4999707 - Synchronizing signal separating circuit separating synchronizing signal (1991-03-12),
10. 4996596 - Phase synchronizing circuit in video signal receiver and method of (1991-02-26),
11. 4942314 - Peak holding circuit for a color television receiver (1990-07-17),
12. 4910771 - Television signal converter (1990-03-20),

Title: Innovations of Yoshichika Hirao

Introduction

Yoshichika Hirao is a prominent inventor based in Neyagawa, Japan. He has made significant contributions to the field of video display technology, holding a total of 12 patents. His work focuses on enhancing the functionality and user experience of projection type video displays.

Latest Patents

One of Hirao's latest patents involves a projection type video display that incorporates a sensor with an image pickup device. This device captures the projected image and allows the display to project an adjustment image. This innovation enables automatic focus adjustment and keystone distortion correction based on the sensor's output. Another notable patent describes a system for manual adjustment, where a motor driving signal corresponding to a user's key operation is sent to a focusing motor via a microcomputer. During automatic adjustment, the system selects a motor driving signal from the sensor to control the focusing motor. The sensor is equipped with a dedicated microcomputer that samples the image pick-up signal from a CCD line sensor to generate contrast data, allowing for automatic focusing adjustments.

Career Highlights

Hirao has been associated with Sanyo Electric Co., Ltd., where he has played a crucial role in developing advanced projection technologies. His innovative approaches have significantly impacted the industry, making video displays more user-friendly and efficient.

Collaborations

Throughout his career, Hirao has collaborated with notable colleagues, including Nobukazu Hosoya and Naoki Kaise. These partnerships have fostered a creative environment that has led to groundbreaking advancements in video display technology.

Conclusion

Yoshichika Hirao's contributions to the field of projection type video displays exemplify his innovative spirit and dedication to enhancing technology. His patents reflect a commitment to improving user experience through advanced engineering solutions.

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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