User Guide

User interface

The UI module contains the following main features:

•

The handset microphone and one of the IHF speakers

•

Various independently controlled lighting zones for the UI features described above

The cross-point matrix, LEDs, microphone and IHF are connected to the handset engine using the I/O expander

described below.

A block diagram of the UI module is shown below. For clarity, the filtering components are not shown.

Note: graphic for ui block TBD

Due to the construction of the module (it is mostly glued together) service is not possible, and if faulty, must

be replaced. This includes any faults that are found in the internal microphone or the lower of the two IHF

speakers.

For operational reasons, the modules are supplied unlocalised, and the correct localization front-panel needs

to be attached after the ‘bare’ module has been installed in the handset.

Display module

Display features

The device has a QVGA 2.4” display with 16M colours.

The module is a color active matrix LCD with a resolution of 240x320. It is a transflective display with a

backlight unit using white LEDs and a lightguide surrounded by a white plastic frame.

As Brixton is LCD AM transflectived display, led driver based backlighting is needed.

RM-412; RM-413

System Module and User Interface

Issue 1 COMPANY CONFIDENTIAL Page 6 –19