Alternately poled piezoelectric transformers using rectangular ceramic plates

Kanayama, Kouichi; Maruko, Nobuhiro

doi:10.1002/(sici)1520-6440(199812)81:12<29::aid-ecjc4>3.0.co;2-m

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Cited by 8 publications

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Trans‐admittance control for eliminating the temperature effect of piezoelectric transformer in the CCFL backlight module

Pai

Chiu

2008

Circuit Theory & Apps

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SUMMARYA half-bridge (HB) resonant inverter for driving a cold cathode fluorescent lamp (CCFL) backlight module with a piezoelectric transformer (PT) is analyzed in this paper. The resonant inductance of the HB inverter is expressed as a function of the load current, the load resistance and the PT circuit parameters. Also, the trans-admittance of the PT-CCFL combination network is measured to track the operating frequency for the HB resonant inverter, which may be varied due to the temperature rise of PT. The lamp driving current and power can thus remain almost constant in a wide temperature range. Experiments show that the observed results match the theoretical analyses.

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Trans‐admittance control for eliminating the temperature effect of piezoelectric transformer in the CCFL backlight module

Pai

Chiu

2008

Circuit Theory & Apps

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A high‐input‐voltage backlight module driver for multi‐lamp LCD panels

Pai

et al. 2011

Circuit Theory & Apps

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SUMMARYA half-bridge (HB) resonant inverter for driving a backlight module with multiple cold cathode fluorescent lamps (CCFLs) is proposed. Conventionally, a backlight module driving inverter is designed to operate with a low-input DC voltage. Therefore, a buck converter is required to step down the high-output DC voltage of a power factor correction (PFC) pre-regulator. The circuit cost is high and the conversion efficiency is low. In this letter, a high-input-voltage HB resonant inverter with only one transformer is used to drive multiple lamps. Analysis and design considerations are discussed in detail. Simulations and experimental results are close to the theoretical prediction.

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Pan

Wang

2008

Circuit Theory & Apps

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Alternately poled piezoelectric transformers using rectangular ceramic plates

Cited by 8 publications

References 4 publications

Trans‐admittance control for eliminating the temperature effect of piezoelectric transformer in the CCFL backlight module

Trans‐admittance control for eliminating the temperature effect of piezoelectric transformer in the CCFL backlight module

A high‐input‐voltage backlight module driver for multi‐lamp LCD panels

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