Electromagnetic Design Techniques for Liquid Crystal Display Driver ICs |
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| Authors: | Ga F Umeda K Nakajima K Watanabe T Takahashi M |
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| Affiliation: | NEC Electron. Corp., Kawasaki; |
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| Abstract: | A simple method of verifying electromagnetic interference (EMI) reduction effects for liquid crystal display (LCD) driver integrated circuits (ICs) is proposed. In this paper, we discuss correlations between radiated emissions and high-frequency currents of power system at three different levels: print circuit board (PCB) level, chip level, and functional circuit level. The EMI design points for LCD driver ICs are presented too. Simulated and measured results prove that our EMI design effectively reduces LCD EMI noise. |
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