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RNS 510 Radio/Navigation System
Menu switch-over support
Depending on the screen interface to be displayed
and the associated windows, selection menus and
submenus, it takes different amounts of time until all
picture information is shown on the screen.
To minimise this time, the data collection for the screen
display runs in the background.
The new screen is only displayed once all necessary
information is available.
This procedure avoids step by step build up of the
screen. This means, however, that there is a short,
noticeable reaction time between operation and
display.
Alpha blending
The displayed windows and menus are processed
graphically and programmed according to
function in order to show the different information on
the VGA display of the RNS 510 in the easiest way for
the user.
One type of preparation is alpha blending, which
means the scalable transparency of screen elements
like on an in-screen display.
The transparency information is saved in the so-called
alpha channel for computer graphics.
This refers to the individual control of each individual
pixel on the screen in terms of its transparency and its
colour value. Specifying a value for the transparency
defines whether the screen pixel reproduces the
information from the background image, the
superimposed window or a mixture of both.
Screen elements shining through
Different transparency levels
Different brightness levels S397_056
S397_051
S397_057
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