US Patent 11415201 Display lift arm

A display assembly has a linkage and counterbalance made to provide non-tilting movement of a display at the end of a support arm while providing counterbalance equal to a change in potential energy of the display. The linkage can be a four-bar, parallelogram-shaped linkage, and the counterbalance can include a Scotch yoke configured to store energy in an energy storage device of the assembly as the support arm rotates. The display assembly can improve comfort and ease of moving a supported display while minimizing friction, hysteresis, and counterbalance mismatch.