Noise radiates from the computer body and cables. Noise also radiates
from the LCD panel and the cable between the computer body and LCD
panel.
Notebook PCs operate with high-speed signals. Because the case is
usually made of plastic, with no shielding effect, high-level noise is
emitted from the computer. Many cables are connected, so noise also
radiates from the cables. In many cases, signals to the LCD panel are
transmitted as LVDSs (Low Voltage Differential Signals), producing high
noise levels from the signal lines. |
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