Company Filing History:
Years Active: 2008-2012
Title: The Innovations of Osamu Sengoku
Introduction
Osamu Sengoku is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of display technology, holding a total of 9 patents. His work primarily focuses on devices that enhance the functionality and efficiency of liquid crystal displays.
Latest Patents
One of Sengoku's latest patents is a brightness adjusting device and liquid crystal display having the same. This device includes a multiplication circuit that multiplies a vertical signal by a predetermined multiplication ratio to output a multiplication signal. It features a differential circuit that distinguishes between different multiplication signals and a serrated wave generator that charges and discharges a condenser according to a signal output from the differential circuit. This generator produces a serrated wave with constant amplitude, independent of the frequency of the multiplication signal. Additionally, the brightness adjusting voltage generator creates a reference voltage to determine pulse duty, while a comparator outputs a pulse signal by comparing the voltage of the serrated wave with the brightness adjusting voltage.
Another notable patent is for an inverter circuit for a backlight device. This circuit includes an inverter transformer that supplies a high AC voltage to multiple discharge tubes, a filter circuit connected to the output terminal of the inverter transformer, and an abnormal discharge detection circuit. The filter circuit allows a current signal with a high-frequency component of the high AC voltage to pass to the abnormal discharge detection circuit, which detects abnormal discharge current based on the current signal.
Career Highlights
Osamu Sengoku is currently employed at Samsung Electronics Co., Ltd., where he continues to innovate and develop new technologies. His work has significantly impacted the advancement of display technologies, particularly in enhancing the performance and reliability of liquid crystal displays.
Collaborations
Sengoku has collaborated with notable colleagues, including Tatsuhisa Shimura and Takashi Kinoshita. Their combined expertise has contributed to the successful development of various technologies in the field.
Conclusion
Osamu Sengoku's contributions to display technology through his innovative patents have established him as a key figure in the industry. His work continues to influence advancements in liquid crystal display technology, showcasing the importance of innovation in this field.