User Interface; Display Interface - Nokia N72 Service Manual

RM-180
Nokia Customer Care System Module

User interface

Display interface

Display module mechanical concept
Figure 98 General diagram of the LCD module
Display features:
• 262,144 colours
• Partial display function Power saving by pausing display process on part of the screen.
• Built-in RAM capacity 176 rows x 208 lines x 18 bits = 658,944 bits
The display has two different operating modes:
1 Normal mode, Full screen, 260k colours
2 Partial idle mode, 8 colours and only part of the display is active
The module includes:
• FPWB foil including connector and discretes and driver circuits
• display panel (glass)
• drivers including display controller and 176 x 208 x 18 bits RAM
• backlight system: lightguide, LEDs and necessary optical sheets
• supporting mechanics
• metal frame (stainless steel)
• plastic frame
The interconnection between the LCD module and the Nokia engine is implemented with a 24-pin board-to-
board connector.
The display is controlled via a MeSSi-8 interface by the application processor. All MeSSi-8 signals go through
the EMC filtering ASIPs.
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