Alphanumeric display and Liquid crystal display

Alphanumeric display noun - A display that gives the information in the form of characters (numbers or letters).

Liquid crystal display and alphanumeric display are semantically related. In some cases you can replace phrase "Liquid crystal display" with "Alphanumeric display", this phrases are similar.

Liquid crystal display noun - A digital display that uses liquid crystal cells that change reflectivity in an applied electric field; used for portable computer displays and watches etc..

Alphanumeric display and liquid crystal display are semantically related. You can use "Alphanumeric display" instead a noun phrase "Liquid crystal display".