The ornamental design for the liquid crystal display stand, as shown and described.
FIG. 1 is a perspective view of the liquid crystal display stand with a liquid display shown in broken lines;
FIG. 2 is a perspective view of the liquid crystal display stand; and,
FIG. 3 is a top plan view of the liquid crystal display stand.
The broken line showing the liquid crystal display is included for the purpose of illustrating an example environment of the stand and forms no part of the claimed invention. Portions of the stand shown in broken lines form no part of the claimed invention.