ESTIMATING THE REDUCTION OF RADIATED EMISSIONS FROM TFT-LCD PANEL USING NETWORK ANALYZER WITH A BULK CURRENT INJECTION PROBE | Zendy

Cheng-Yu Ho | Zendy; Kai-Syuan Chen | Zendy; TzyySheng Horng | Zendy; JianMing Wu | Zendy

Open Access

ESTIMATING THE REDUCTION OF RADIATED EMISSIONS FROM TFT-LCD PANEL USING NETWORK ANALYZER WITH A BULK CURRENT INJECTION PROBE

Author(s) -

Cheng-Yu Ho,

Kai-Syuan Chen,

TzyySheng Horng,

JianMing Wu

Publication year - 2013

Publication title -

electromagnetic waves

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.437

H-Index - 89

eISSN - 1559-8985

pISSN - 1070-4698

DOI - 10.2528/pier13041115

Subject(s) - spectrum analyzer , liquid crystal display , current (fluid) , reduction (mathematics) , thin film transistor , network analyzer (electrical) , materials science , optoelectronics , environmental science , electronic engineering , electrical engineering , engineering , nanotechnology , mathematics , geometry , layer (electronics)

A network analyzer with a bulk current injection (BCI) probe is proposed to measure the common-mode conversion coe-cient for DC supply loops on a driver PCB of thin fllm transistor-liquid crystal display (TFT-LCD) panel. The proposed technique is used to predict the common-mode radiated emission caused by the DC supply loops, which highly correlates with the radiated emission measurements obtained for the TFT-LCD panel in a fully anechoic chamber (FAC). The proposed technique is also successful to estimate the reduction of a speciflc peak in the radiated emission spectrum by shielding the DC supply loops on a driver PCB of TFT-LCD panel. Electromagnetic simulation and equivalent-circuit modeling approaches are developed to conflrm the common-mode radiation mechanism in this study.

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