Display Mode Horizontal
Frequency
(kHz)
Vertical Fre-
quency (Hz)
Pixel Clock
(MHz)
Sync Polarity
(H/V)
VESA, 1280 X 1024 79.976 75.025 135.000 +/+
VESA, 1440 X 900 55.935 59.887 106.500 -/+
VESA, 1440 X 900 70.635 74.984 136.750 -/+
Horizontal Frequency
The time to scan one line connecting the right edge to the
left edge of the screen horizontally is called the Horizontal
Cycle and the inverse number of the Horizontal Cycle is
called the Horizontal Frequency. Unit: kHz
Vertical Frequency
Like a fluorescent lamp, the screen has to repeat the same
image many times per second to display an image to the
user. The frequency of this repetition is called the Vertical
Frequency or Refresh Rate. Unit: Hz
Specifications
59
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