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Flat-Panel Display
The PowerBook G4 17-inch computer has a built-in, wide-screen, 100 dpi, color flat-panel display with a
resolution of 1440 by 900 pixels and measures 17 inches diagonally.
The display is backlit by a cold cathode fluorescent lamp (CCFL). The display uses TFT (thin-film transistor)
technology for high contrast and fast response.
In addition to its native resolution (1440 by 900) the display also supports several non-native resolutions, as
shown in Table 3-12. The graphics controller IC includes a scaling function that expands displays with those
smaller resolutions to fill the screen.
The display’s native resolution, 1440 by 900, has an aspect ratio of 16:10. When selecting a picture resolution
with an aspect ration of 4:3, the user can choose to have it displayed with square pixels and black margins
on the sides, or with stretched pixels that fill the display from side to side. These options are shown in Table
3-12 (page 44).
Table 3-12 Picture sizes on the flat-panel display
Shape of pixelsBlack marginsDisplay area usedPicture size
squareyes1200 by 900800 by 600
stretchedno1440 by 900800 by 600
squareno1440 by 9001024 by 640
squareyes1200 by 9001024 by 768
stretchedno1440 by 9001024 by 768
squareno1440 by 9001152 by 720
square (native)no1440 by 9001440 by 900
44
Flat-Panel Display
Legacy Document | 2003-03-01 | © 2003 Apple Computer, Inc. All Rights Reserved.
CHAPTER 3
Devices and Ports