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2008•The Transactions of the Korean Institute of Power ElectronicsRequires access

Design and Application of CCFL Drive Inverter Transformer for LCD Backlight

Sang-Ho Cho, Sang-Kyoo Han, Sung-Soo Hong, Sug-Chin SaKong, Gi-Hyun Kwon, Hyo-Bum Lee, Chung‐Wook Roh

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Abstract

In a large screen sized LCD-TV, a backlight system with only one cold cathode fluorescent lamp(CCFL) can not meet brightness specification. Thus, considerable numbers of CCFLs are used to meet brightness specification. In this paper, the design guide for the inverter transformer which can drive 4 CCFLs instantaneously is presented. With the presented design, the inverter transformer that guarantee identical lamp currents under the nonidentical lamp characteristic condition, can be implemented easily. The developed inverter transformer is adopted in a 42 LCD-TV backlight. The experimental results are presented to show the validity of the presented design guide.

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What this paper is about

In a large screen sized LCD-TV, a backlight system with only one cold cathode fluorescent lamp(CCFL) can not meet brightness specification. Thus, considerable numbers of CCFLs are used to meet brightness specification. In this paper, the design guide for the inverter transformer which can drive 4 CCFLs instantaneously is presented. With the presented design, the inverter transformer that guarantee identical lamp currents under the nonidentical lamp characteristic condition, can be implemented easily. The developed inverter transformer is adopted in a 42 LCD-TV backlight. The experimental results are presented to show the validity of the presented design guide.

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OpenAlex reports 2 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In a large screen sized LCD-TV, a backlight system with only one cold cathode fluorescent lamp(CCFL) can not meet brightness specification. Thus, considerable numbers of CCFLs are used to meet brightness specification. In this paper, the design guide for the inverter transformer which can drive 4 CCFLs instantaneously is presented. With the presented design, the inverter transformer that guarantee identical lamp currents under the nonidentical lamp characteristic condition, can be implemented easily. The developed inverter transformer is adopted in a 42 LCD-TV backlight. The experimental results are presented to show the validity of the presented design guide.

Key concepts: Backlight, Cold cathode, Liquid-crystal display, Transformer, Inverter, Brightness, Electrical engineering, Engineering

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