Wiktionary
a. 1 Without a screen. 2 (context printing English) That does not involve a screen; see ''screen printing''.
Wikipedia
Screenless video describes systems for transmitting visual information from a video source without the use of a screen. Screenless computing systems can be divided into three groups: Visual Image, Retinal Direct, and Synaptic Interface.
Usage examples of "screenless".
From the screenless window a fly came looping in, made tentative passes at the inkwell on the desk pad, then settled down on the desktop and rubbed its feelers contentedly.
He leaned forward so his upper body hung outside the screenless window.
He knelt in front of the open screenless window and steadied his elbows on the sill, adjusting the focus.
She made her way over to the open screenless windows and saw that the white stucco cottage clung precariously to a barren hillside overlooking the sea.
Instantly images burst forth: the same sort of screenless projection that came from our globe.
I put the remains in the plastic bag that served as a tablecloth and tie it up tightly to discourage the flies that have free access to my essentially screenless abode.
The house itself was dark, but she smelled the scent of burning mesquite and as she neared the front door, she could see through the glass wall that logs were burning in the screenless living room fireplace.