Hi Baz
If your DSLR has USB output, then you should be able to run a lead into the USB socket in the side flap on the back of the Individual. The TV should then see the card in the camera as a drive.
If that's not the answer, then I have used a card reader plugged into the USB socket.
The third (and easiest!) option is to copy the pictures onto a USB Memory stick and use that, of course.
If your Loewe doesn't recognise the USB port, try switching it off and on at the power switch under the front. There was a software fix for this on recent models, I believe, so if your USB port on the TV isn't being recognised, you might want to ask your Loewe store to send an engineer with a software update under the guarantee.
Regards
Gazlet