A monochrome screen refers to a display or screen that shows only one color, usually black and white. It has limited color options and can only display shades of that one color. Full definition
The main viewing area is made up of a 6 inch monochrome screen offering 16 shades of gray while having a resolution of 800 x 600 pixels. (goodereader.com)
Also, its small monochrome screen is not the best for every type of material. (theguardian.com)
A business card - size monochrome screen dominates the top of the stack, surrounded by standard radio buttons and a slot for a single CD player. (cnet.com)