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

Yu Kang Lo; Kai Jun Pai; Huang Jen Chiu

doi:10.1002/cta.476

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

Yu Kang Lo^*, Kai Jun Pai, Huang Jen Chiu

^*Corresponding author for this work

Undergraduate Program of Vehicle and Energy Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

A 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.

Original language	English
Pages (from-to)	939-952
Number of pages	14
Journal	International Journal of Circuit Theory and Applications
Volume	36
Issue number	8
DOIs	https://doi.org/10.1002/cta.476
Publication status	Published - 2008 Nov

Keywords

CCFL
Half-bridge inverter
Piezoelectric transformer
Trans-admittance control

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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10.1002/cta.476

Cite this

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title = "Trans-admittance control for eliminating the temperature effect of piezoelectric transformer in the CCFL backlight module",

abstract = "A 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.",

keywords = "CCFL, Half-bridge inverter, Piezoelectric transformer, Trans-admittance control",

author = "Lo, {Yu Kang} and Pai, {Kai Jun} and Chiu, {Huang Jen}",

year = "2008",

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doi = "10.1002/cta.476",

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T1 - Trans-admittance control for eliminating the temperature effect of piezoelectric transformer in the CCFL backlight module

AU - Lo, Yu Kang

AU - Pai, Kai Jun

AU - Chiu, Huang Jen

PY - 2008/11

Y1 - 2008/11

N2 - A 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.

AB - A 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.

KW - CCFL

KW - Half-bridge inverter

KW - Piezoelectric transformer

KW - Trans-admittance control

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DO - 10.1002/cta.476

M3 - Article

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SN - 0098-9886

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EP - 952

JO - International Journal of Circuit Theory and Applications

JF - International Journal of Circuit Theory and Applications

IS - 8

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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