The present invention is directed to a display device assembly which comprises a display device and a luminance enhancement structure. Electrical conductors may be embedded into the panel to permit attachment and electrical coupling of lights and other electrical devices thereto. An internal heat exchanger is provided for cooling the dehumidified heat-absorbing air and then supplying it to the expander. The cover skin is welded to the main body at outer edges. To carry out a sensing, recording or monitoring function, such as esophageal oximetry, one or more oximetry probes are mounted to the carrier member such that engagement of the carrier member with the esophageal stethoscope converts the stethoscope for use in an oximetry sensing application.