Effect of Driving Frequency on the EL Characteristics of Thick Ceramic Insulating Type TFEL Devices Using Y_2O_3-Based Phosphor Emitting Layer(<Special Section>Electronic Displays)
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概要
- 論文の詳細を見る
The driving frequency dependence of EL characteristics were investigated in thick ceramic insulating type thin-film electroluminescent (TFEL) devices with various Mn-activated Y_2O_3-based phosphor thin-film emitting layers driven by a sinusoidal wave voltage. High luminous efficiencies of approximately 10 and 1 lm/W were obtained in the TFEL devices driven at 60 Hz and 1 kHz, respectively. The difference in luminous efficiency was mainly caused by the increase of input power in 1 kHz-driven-devices resulting from a dielectric loss of a thick BaTiO_3 ceramic sheet used as the insulating layer. The correlation between the sound emission from the devices and the effective power consumed in the devices was found with variations in both the applied voltage and the frequency. The higher input power of the 1 kHz-driven-device may be attributable to sound emissions resulting from the piezo-electricity of BaTiO_3 ceramics.
- 社団法人電子情報通信学会の論文
- 2004-11-01
著者
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Minami T
Department Of Applied Materials Science Graduate School Of Engineering Osaka Prefecture University
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Suzaki Y
Ntt Photonics Laboratories
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MINAMI Tadatsugu
Optoelectronic Device System R&D Center, Kanazawa Institute of Technology
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MIYATA Toshihiro
Optoelectronic Device System R&D Center, Kanazawa Institute of Technology
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Suzuki Y
Optoelectronic Device System R&d Center Kanazawa Institute Of Technology
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SUZUKI Yasuyuki
Optoelectronic Device System R&D Center, Kanazawa Institute of Technology
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IHARA Kazuhiko
Optoelectronic Device System R&D Center, Kanazawa Institute of Technology
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Suzuki Y
Technology Development Division Victor Company Of Japan Limited
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Miyata T
Optoelectronic Device System R&d Center Kanazawa Institute Of Technology
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Minami Tadatsugu
Optoelectronic Device System R&d Center Kanazawa Institute Of Technology
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Miyata Toshihiro
Optoelectronic Device System R&d Center Kanazawa Institute Of Technology
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Ihara Kazuhiko
Optoelectronic Device System R&d Center Kanazawa Institute Of Technology
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Suzuki Yasuyuki
Optoelectronic Device System R&D Center, Kanazawa Institute of Technology
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