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For the Inventor, By the Inventor

Tokyo, Japan

Tadahiko Hirai

This inventor holds 18 USPTO granted patents, primarily in Display Technology. Top assignee: Canon Kabushiki Kaisha. Active years: 2002-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadahiko Hirai. Retrieved from https://idiyas.com/inventor/tadahiko-hirai

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

USPTO Granted Patents = 18

% Patents Active = 22.2

Average Co-Inventor Count = 1.7

ph-index = 8

Forward Citations = 182(Granted Patents)


Location History:

  • Kanagawa, JP (2002 - 2004)
  • Ohta-ku, JP (2008 - 2010)
  • Caulfield, AU (2013)
  • Tokyo, JP (2006 - 2014)

Company Filing History:

goldMedal18 out of 93,085 
 
Canon Kabushiki Kaisha
 patents

Years Active: 2002-2014

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Areas of Expertise:
Active Matrix Display
Organic Electroluminescence
Driving Method
Resonance Tag
Temperature Sensor
Nonvolatile Memory
Semiconductor Integrated Circuit
RF Modulation Circuit
Magnetic Memory
Information Reproducing Method
Capacitive Element
18 patents (USPTO):Explore Patents
1. 8643570 - Active matrix organic electroluminescence display and its gradation control method (2014-02-04),
2. 8395613 - Display apparatus and driving method thereof (2013-03-12),
3. 8228271 - Active-matrix display and drive method thereof (2012-07-24),
4. 8179343 - Display apparatus and driving method of display apparatus (2012-05-15),
5. 8043000 - Resonance tag with temperature sensor (2011-10-25),
6. 7817043 - Radio frequency tag (2010-10-19),
7. 7791569 - Light emitting element circuit and drive method thereof (2010-09-07),
8. 7696883 - Resonance tag, method of reversibly changing resonance characteristics of resonance circuit, and capacitive element (2010-04-13),
9. 7696530 - Dual-gate sensor (2010-04-13),
10. 7607829 - Resonance tag with temperature sensor (2009-10-27),
11. 7359230 - Nonvolatile memory device (2008-04-15),
12. 7355879 - Semiconductor integrated circuit, operating method thereof, and IC card including the circuit (2008-04-08),
13. 7115898 - Organic semiconductor device, RF modulation circuit, and IC card (2006-10-03),
14. 6724651 - Nonvolatile solid-state memory and method of driving the same (2004-04-20),
15. 6703676 - Magnetic memory device and manufacturing method thereof (2004-03-09),

Title: The Innovations of Tadahiko Hirai

Introduction

Tadahiko Hirai is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of display technology, holding a total of 18 patents. His work primarily focuses on advancements in organic electroluminescence displays, which have become increasingly important in modern electronics.

Latest Patents

Hirai's latest patents include an active matrix organic electroluminescence display and its gradation control method. This innovative display comprises multiple selection and data lines that intersect, along with a pixel circuit connected to these lines. The pixel circuit features switching devices, a storage capacitor, and an organic EL device. During a specific period, the pixel circuit holds an applied first data signal as a voltage at the storage capacitor. This voltage controls the current supplied to the organic EL device, allowing it to emit light at varying luminance levels. Another patent focuses on a display apparatus that includes a matrix of pixels, an acquisition unit for assessing degradation characteristics, and a correction unit that adjusts the video signal to ensure consistent luminance across the display.

Career Highlights

Hirai is currently employed at Canon Inc., a leading company in imaging and optical products. His work at Canon has allowed him to push the boundaries of display technology, contributing to the development of high-quality visual displays that enhance user experience.

Collaborations

Throughout his career, Hirai has collaborated with notable colleagues, including Takayuki Sumida and Jun Sumioka. These partnerships have fostered a creative environment that has led to groundbreaking innovations in display technology.

Conclusion

Tadahiko Hirai's contributions to the field of organic electroluminescence displays have significantly impacted modern technology. His innovative patents and collaborations continue to shape the future of display systems, making him a key figure in the industry.

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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