The phrase "a display unit" is correct and usable in written English.
It can be used to refer to a device or component that visually presents information, often in the context of electronics or computing.
Example: "The new model features a high-resolution display unit that enhances user experience."
Alternatives: "a monitor" or "a screen".
Its device, like Dr McCoy's, consists of a small hand-held sensor unit that communicates wirelessly with a display unit (in this case, a smartphone).
Everything is thus in place for a display unit that can both extract power from the outside world and also receive signals from it.
So during some training rides, Mr. Barry wears a wireless heart rate monitor, which uses electrodes strapped to his chest to measure heart performance and sends the information to a display unit on his wrist.
A color transparent screen was designed in this paper, a planar glass was used as a waveguide structure and the lens array holographic optical element (HOE) was used as a display unit.
Prototype soldier helmets, for instance, have a built-in video camera, an infrared camera for night vision, a microphone for voice communications and a display unit linked to global positioning satellites to show the soldier's location, that of fellow soldiers and of suspected enemy positions.
Deep underground is a display unit.
The Picturephone terminal consisted of a free-standing microphone and a video display unit containing a speaker, an electron-tube camera, and a cathode-ray picture tube.
Subjects were required to keep a cursor in alignment with a moving target on a visual display unit screen using a mouse.
A van, with a giant display unit on the side, is showing more than 50 CCTV images of the wanted people between 7am and 7pm on Friday and Saturday.
When we use the term 'human computer interaction' (HCI), the image that is conjured up is of a person sitting at a visual display unit staring in at the world of 'information'; the person is very much outside the space of information.
A video display unit presents the patient with a stimulus that is a monochrome sinusoidal grating of vertical black and white bars.
