Golf clubs with electronic displays

A golf club head comprising:

• a body defining an interior cavity, a sole defining a bottom portion of the golf club head, a crown defining a top portion of the golf club head, a face defining a forward portion of the golf club head, a rearward portion of the golf club head opposite the face, and a hosel, wherein the face comprises a plurality of layers, the plurality of layers comprising:
• a base layer;
• a piezoelectric layer coupled to the base layer;
• and
• an electronic paper display coupled to the piezoelectric layer,
• wherein the piezoelectric layer is configured to generate a signal in response to a golf ball impacting the face, and the electronic paper display is configured to display an impact location of the golf ball on the face in response to the signal from the piezoelectric layer.

A golf club head comprising:

• a body defining an interior cavity, a sole defining a bottom portion of the golf club head, a crown defining a top portion of the golf club head, a face defining a forward portion of the golf club head, a rearward portion of the golf club head opposite the face, and a hosel, the golf club head having a topline along a face-to-crown transition at the forward portion of the golf club head,
• wherein the face includes a center face location that defines a head origin of a coordinate system in which an x-axis is tangential to the face at the center face location and is parallel to a ground plane when the golf club head is in a normal address position, a y-axis extends perpendicular to the x-axis and is also parallel to the ground plane, and a z-axis extends perpendicular to the ground plane, wherein a positive x-axis extends toward a heel portion from the head origin, a positive y-axis extends toward the rearward portion from the head origin, and a positive z-axis extends toward the top portion from the head origin;
• the crown comprising a first electronic paper display, the first electronic paper display comprising a front edge portion extending along a front portion of the crown;
• and
• the face comprising a second electronic paper display, the second electronic paper display comprising a top edge portion extending along an upper edge of the face, and
• wherein the first electronic paper display and the second electronic paper display are configured to display images that change a position of the topline along the positive y-axis from a perspective of a user of the golf club head when the golf club head is in a normal address position.