Samsung UD55A 사용자 설명서
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Period
Use this function to set the execution period for each mode set in the timer.
Time
Within the set period of time specify a time for execution.
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Mode - Bar, Eraser, Pixel : 10~50 sec
Bar
This function prevents after-images on the screen by moving long black and white vertical lines.
Eraser
This function prevents after-images on the screen by moving a rectangular pattern.
Adjusting the LCD Display