Abstract: A trusted screen overlay (TSO) assembly comprising: an electronic display; a source of unsecure pixel data for display on the electronic display; a source of secure pixel data for displaying on an overlay region of the electronic display; a switching arrangement including a switch control assembly and a switch, the switch arranged to switch the electronic display between the source of unsecure pixel data and the source of secure pixel data under control of the switch control assembly; and the switch control assembly being responsive to the source of unsecure pixel data and configured to operate the switch to switch the electronic display to the source of secure pixel data by tracking locations of pixels in unsecure pixel data from the source of unsecure pixel data, relative to the overlay region of the electronic display.

Abstract: A transformer assembly (2) includes a base (4) comprising a CNC machine milled aluminum plate that is designed for liquid cooling. Three magnetic flux conductive cores (30a, 30b, 30c) are mounted to the core and are interlinked by three winding assemblies (6a, 6b and 6c). The winding assemblies each include a plurality of heat conductive members (10). The heat conductive members (10) extend from the base through the winding assemblies and conduct operative heat from the winding assemblies to the base for dissipation from the base during use. The heat conductive members each comprise a copper tube sealed at either end with a fluid within. In use a convection current forms in the fluid that causes the fluid to circulate from one end of the tube to the other thereby transmitting heat along the conductive member to thereby transmit heat from the coils to the liquid cooled base in use.