Make sure that your slider Wrapping Container allows you to go fullwidth and fullheight, and there is no limitation in width / maxwidth.In case your container is Boxed, and you want to force the Slider to go Fullscreen, than simple use the forceFullWidth:"on" parameter !
If you wish to have an Offset top and bottom, since you have some header or Footer, or both, please take a look on the example 03B here: 03B.Sample-FullScreen-Offsets
<script type="text/javascript"> var revapi; jQuery(document).ready(function() { revapi = jQuery('.tp-banner').revolution( { delay:15000, startwidth:1170, startheight:500, hideThumbs:10, fullWidth:"off", fullScreen:"on", fullScreenOffsetContainer: "" }); }); //ready </script>