Providing Constant Counterbalance Throughout Predetermined Range of Motion

An apparatus comprising:

• a display;
• a lever arm coupled to a pivot point and coupled to the display at a lever arm length from the pivot point, the lever arm rotating around the pivot point through a lever arm range of motion, the weight of the display producing a display torque around the pivot point that varies as the lever arm rotates through the lever arm range of motion;
• a cable coupled to the lever arm;
• a pulley in which the cable contacts, wherein a point on the pulley that the cable contacts is at the lever arm length from the pivot point;
• and
• a torsion spring coupled to the pulley that produces a spring torque, through the lever arm, around the pivot point that is equally opposite of the display torque throughout the lever arm range of motion as the lever arm travels through the lever arm range of motion.

A computer-implemented method comprising:

• identifying a maximum display weight of a display;
• selecting a lever arm that couples to the display and a pivot point, the distance between the pivot point and the display being a lever arm length, wherein the display produces a display torque around the pivot point;
• computing a spring force of a spring when the lever arm is in a horizontal position based upon the display torque;
• computing a required spring constant of the spring based upon the spring force;
• computing a maximum spring force of the spring, the maximum spring force being at a point when the lever arm is furthest away from a pulley that guides a cable that couples to the spring and the lever arm;
• and
• selecting the spring based upon the spring constant and the maximum spring force, wherein the spring produces a spring torque, through the lever arm, around the pivot point that is equally opposite of the display torque throughout the lever arm range of motion as the lever arm travels through the lever arm range of motion.