A photo TCM showed of Ellison when they gave a recurring short montage of stars who died in 2018.
I'd guess this photo is from the mid/late 1970's.

Ellison frequently in the 1970's would write a short story either in the display window of a bookstore, or live on the air during a radio program guest appearance. A display of the writer at work, and also of his craftsmanship, to work in a short prescribed time, or with call-ins to give him words or sentences that he would expand into a full story to complete and read on air, or at a booksigning appearance.