The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
액정 디스플레이(LCD)의 백라이트 시스템에는 로우 프로파일 인버터 전원 공급 장치가 점점 더 요구되고 있습니다. 이러한 전원 공급 장치에 압전 변압기(PT)를 적용하는 데 많은 관심이 집중되어 왔습니다. PT 인버터를 더욱 소형화하려면 PT는 다층 PT를 통해 달성할 수 있는 충분한 높은 전압 승압비를 가져야 합니다. 먼저, 본 논문에서는 분산 상수 등가 회로 모델을 사용하여 이러한 성능을 시뮬레이션하는 방법을 설명합니다. 7차 종방향 진동 모드로 작동되는 다층 PT에 대한 시뮬레이션 결과는 내부 전극의 저항이 지배적인 손실 요인을 유발한다는 것을 보여줍니다. 다음으로 다층 PT를 적용한 전력 인버터를 제작하였다. 이 전력 인버터는 20~90V의 넓은 입력 DC 전압 범위에서 작동할 수 있습니다. 기존 인버터 구동 회로의 경우 입력 DC 전압 범위가 확장되면 인버터 효율이 현저히 감소했습니다. 이를 위해 당사에서는 PT에 공급되는 구동전압을 일정한 값으로 유지하기 위한 자동 구동전압 제어회로를 탑재한 새로운 인버터 회로를 개발하였습니다. 그 결과, 제작된 전력 인버터는 3.5% 이상의 전체 효율과 12.1인치 컬러 LCD를 밝히기에 충분한 30W의 출력을 나타냈다. 백라이트 광투과판의 최대 휘도 효율은 XNUMXcd/m에 달한다.2/W.
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부
Mitsuru YAMAMOTO, Yasuhei SHIMADA, Yasuhiro SASAKI, Takeshi INOUE, Kentaro NAKAMURA, Sadayuki UEHA, "A Multilayered Piezoelectric Transformer Operating in the Third Order Longitudinal Mode and Its Application for an Inverter" in IEICE TRANSACTIONS on Electronics,
vol. E85-C, no. 10, pp. 1824-1832, October 2002, doi: .
Abstract: Low-profile inverter power supplies are increasingly required for backlight systems of liquid crystal displays (LCDs). A great deal of attention has been focused on the application of piezoelectric transformers (PTs) to such power supplies. To miniaturize PT inverters still further, PTs need to have sufficient high voltage-step-up-ratio, which can be achieved by a multilayered PT. First, this paper describes a method for simulating such performance using a distributed constant equivalent circuit model. The results of the simulation for a multilayered PT operated in the third order longitudinal vibration mode show that the resistance of internal electrodes causes the dominant loss factor. Next, a power inverter incorporating the multilayered PT was fabricated. This power inverter can be operated over a wide input DC voltage range from 7-20 V. Regarding a conventional inverter drive circuit, when input DC voltage range was extended, the inverter efficiency remarkably decreased. For the reason, we developed a new inverter circuit, which is equipped with an automatic drive voltage control circuit to maintain the drive voltage to the PT at a constant value. As a result, the fabricated power inverter exhibited more than 90% overall efficiency and 3.5 W output power, which is enough to light up a 12.1-inch color LCD. The maximum luminance efficiency on a light transmission plate of the backlight was as high as 30 cd/m2/W.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e85-c_10_1824/_p
부
@ARTICLE{e85-c_10_1824,
author={Mitsuru YAMAMOTO, Yasuhei SHIMADA, Yasuhiro SASAKI, Takeshi INOUE, Kentaro NAKAMURA, Sadayuki UEHA, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Multilayered Piezoelectric Transformer Operating in the Third Order Longitudinal Mode and Its Application for an Inverter},
year={2002},
volume={E85-C},
number={10},
pages={1824-1832},
abstract={Low-profile inverter power supplies are increasingly required for backlight systems of liquid crystal displays (LCDs). A great deal of attention has been focused on the application of piezoelectric transformers (PTs) to such power supplies. To miniaturize PT inverters still further, PTs need to have sufficient high voltage-step-up-ratio, which can be achieved by a multilayered PT. First, this paper describes a method for simulating such performance using a distributed constant equivalent circuit model. The results of the simulation for a multilayered PT operated in the third order longitudinal vibration mode show that the resistance of internal electrodes causes the dominant loss factor. Next, a power inverter incorporating the multilayered PT was fabricated. This power inverter can be operated over a wide input DC voltage range from 7-20 V. Regarding a conventional inverter drive circuit, when input DC voltage range was extended, the inverter efficiency remarkably decreased. For the reason, we developed a new inverter circuit, which is equipped with an automatic drive voltage control circuit to maintain the drive voltage to the PT at a constant value. As a result, the fabricated power inverter exhibited more than 90% overall efficiency and 3.5 W output power, which is enough to light up a 12.1-inch color LCD. The maximum luminance efficiency on a light transmission plate of the backlight was as high as 30 cd/m2/W.},
keywords={},
doi={},
ISSN={},
month={October},}
부
TY - JOUR
TI - A Multilayered Piezoelectric Transformer Operating in the Third Order Longitudinal Mode and Its Application for an Inverter
T2 - IEICE TRANSACTIONS on Electronics
SP - 1824
EP - 1832
AU - Mitsuru YAMAMOTO
AU - Yasuhei SHIMADA
AU - Yasuhiro SASAKI
AU - Takeshi INOUE
AU - Kentaro NAKAMURA
AU - Sadayuki UEHA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E85-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2002
AB - Low-profile inverter power supplies are increasingly required for backlight systems of liquid crystal displays (LCDs). A great deal of attention has been focused on the application of piezoelectric transformers (PTs) to such power supplies. To miniaturize PT inverters still further, PTs need to have sufficient high voltage-step-up-ratio, which can be achieved by a multilayered PT. First, this paper describes a method for simulating such performance using a distributed constant equivalent circuit model. The results of the simulation for a multilayered PT operated in the third order longitudinal vibration mode show that the resistance of internal electrodes causes the dominant loss factor. Next, a power inverter incorporating the multilayered PT was fabricated. This power inverter can be operated over a wide input DC voltage range from 7-20 V. Regarding a conventional inverter drive circuit, when input DC voltage range was extended, the inverter efficiency remarkably decreased. For the reason, we developed a new inverter circuit, which is equipped with an automatic drive voltage control circuit to maintain the drive voltage to the PT at a constant value. As a result, the fabricated power inverter exhibited more than 90% overall efficiency and 3.5 W output power, which is enough to light up a 12.1-inch color LCD. The maximum luminance efficiency on a light transmission plate of the backlight was as high as 30 cd/m2/W.
ER -