Presented below are some detailed photos and videos of a screen used hero illuminating Starfleet Science Tricorder from the production of Star Trek: Voyager (UPN, 1995 - 2001). This TR 590 Tricorder X prop recently sold as Lot 667 in the Profiles In History Drama, Action, Romance: The Hollywood Auction held at Calabasas Hills, CA in December, 2012. Both the Mark IX and Mark X tricorder props were nearly identical in appearance, featuring the same graphic displays, and were utilized in episodes of Voyager and DS9 as well as the feature films Star Trek: First Contact and Star Trek: Insurrection. As one of the later designs of the working 24th century tricorder, the hero Mark X props are amongst the most visually impressive creations for a Star Trek production; featuring numerous backlit and cascading LED graphic displays ...
A hero illuminating Tricorder VII from the 3rd season of Star Trek: TNG was the focus of an earlier photostudy on this site; and may be seen at the following link: http://www.startrekpropauthority.com/2008/11/star-trektng-3rd-season-working-science.html