I believe your Vizio is fully automatic so there's not much you can do with settings other than bump it up brighter if it has that feature. I would probably not zoom so much and get the camera up closer to the pen. This will crisp up you picture, since most point & shoot cameras take better pictures at the wide angle setting as opposed to the zoom setting. The lens will also let in more light at the wider angle settings (lower f stop), possibly making your picture brighter.
It seems that most of the light in the lightbox is coming from overhead. A little more side lighting, particularly from the upper left side might be nice to experiment with. As was mentioned before, a white posterboard background might also be nice. There's lots of room for experimentation.
I use a little pea-sized piece of Blu-Tack to hold the pen while I'm shooting. Elmer's Tack is similar stuff but is orange instead of blue.
Finally, I highly recommend you do post-processing to improve the pictures. I use GIMP, a free program with several Photoshop features. Go to Colors, then Levels. Click on the little eyedropper under the right side of the graph and then click on something in your photo that should be white. This will automatically adjust the white point for you. You can also go to Colors, then Curves. Click on the middle of the oblique line and drag it up about one square. This will lighten the midtones of your picture. Play around with it for best effect.
I also use the free program, IrfanView to perform quick and easy image resizing and sharpening after resizing. This is also my default image viewer.
Have fun playing around. You're off to an excellent start. I also really like your pen.
Dave