ssd1908 Solomon Systech Limited:, ssd1908 Datasheet - Page 140

• Manufacturer Part Number: ssd1908
• Description: Lcd Drivers,lcd Controllers
• Manufacturer: Solomon Systech Limited:

18 Virtual Display Mode
Virtual display refers to the situation where the image to be viewed is larger than the physical display. The
difference can be in the horizontal, vertical or both dimensions. To view the image, the display is used as a
window into the display buffer. At any given time only a portion of the image is visible. Panning and scrolling
are used to view the full image. Panning describes the horizontal (side to side) motion of the display area.
Scrolling describes the vertical (up and down) motion of the display area.
The Main Window Display Start Address register specifies the starting address of main window image in the
display buffer. The Main Window Line Address Offset register determines the number of horizontal pixels in
the virtual image. Figure 18-1 : Main Window inside Virtual Image Area illustrates the situation.
Panning
240 x 160
Main Window
Scrolling
320 x 240
Virtual Image Area
Figure 18-1 : Main Window inside Virtual Image Area
Solomon Systech
Oct 2003
P 130/130 Rev 1.0
SSD1908