Golf club

Abstract

A golf club head is provided with an electronic display that is visible to a user of the golf club head when the golf club head is in the address position, such as for displaying one or more images to the user. The electronic display may include a memory, a microprocessor, and a battery, and may be configured to communicate with a user operable electronic device via a wired or a wireless communication protocol. For example, the electronic display may be configured to receive one or more images from the user operable electronic device, to store the one or more images in the memory, and to display the one or more images to the user.

We claim: 
     
         1 . A golf club head comprising:
 a golf club body having a face, a crown and a sole together defining an interior cavity, the golf club body including a heel and a toe portion and having an x, y and z axes which are orthogonal to each other having their origin at USGA center face; and   wherein the golf club head has an alignment feature delineating a transition between at least a first portion of the crown having an area of contrasting shade or color with a shade or color of the face;   wherein the alignment feature has:
 a. a Sight Adjusted Perceived Face Angle (SAPFA) of from about −2 to about 10 degrees; and 
 b. a Sight Adjusted Perceived Face Angle 25 mm Heelward (SAPFA 25H ) of from about −5 to about 2 degrees; and 
 c. a Sight Adjusted Perceived Face Angle 25 mm Toeward (SAPFA 25T ) of from 0 to about 9 degrees; and 
 d. a Radius of Curvature (circle fit) of from about 300 to about 1000 mm. 
   
     
     
         2 . The golf club head of  claim 1 , wherein:
 a. the Sight Adjusted Perceived Face Angle (SAPFA) is from 0 to about 6 degrees; and   b. the Sight Adjusted Perceived Face Angle 25 mm Heelward (SAPFA 25H ) is from about −3 to 0 degrees; and   c. the Sight Adjusted Perceived Face Angle 25 mm Toeward (SAPFA 25T ) is from about 1 to about 4.5 degrees; and   d. the Radius of Curvature (circle fit) is from about 400 to about 900 mm.   
     
     
         3 . The golf club head of  claim 2 , wherein:
 a. the Sight Adjusted Perceived Face Angle (SAPFA) is from about 0.5 to about 4 degrees; and   b. the Sight Adjusted Perceived Face Angle 25 mm Heelward (SAPFA 25H ) is from about −2 to about −1 degrees; and   c. the Sight Adjusted Perceived Face Angle 25 mm Toeward (SAPFA 25T ) is from about 2 to about 4 degrees; and   d. the Radius of Curvature (circle fit) is from about 500 to about 775 mm.   
     
     
         4 . The golf club head of  claim 1 , wherein the alignment feature has a contrasting color difference (ΔE*ab) greater than 60, wherein the contrasting color difference (ΔE*ab) is between the first portion of the crown and the face. 
     
     
         5 . The golf club head of  claim 1 , further including an electronic display on at least a portion of the crown. 
     
     
         6 . The golf club head of  claim 5 , wherein the electronic display is a color display. 
     
     
         7 . The golf club head of  claim 5 , wherein the electronic display is user adjustable. 
     
     
         8 . The golf club head of  claim 5 , wherein the electronic display comprises a secondary alignment feature, and the golf club body has a volume of 420-500 cc. 
     
     
         9 . The golf club head of  claim 8 , wherein the secondary alignment feature is user adjustable. 
     
     
         10 . The golf club head of  claim 9 , wherein an orientation of the secondary alignment feature is user adjustable and changes a Sight Adjusted Perceived Face Angle Secondary Alignment Feature (SAPFA SAF ). 
     
     
         11 . The golf club head of  claim 10 , wherein the secondary alignment feature has at least one elongate side extending primarily in a direction of the x axis and having a side length that is at least one inch. 
     
     
         12 . The golf club head of  claim 11 , wherein an imaginary perpendicular reference line extends orthogonal from a midpoint of the elongate side, and the imaginary perpendicular reference line intersects the x axis at a location heelward of the center face. 
     
     
         13 . The golf club head of  claim 10 , wherein the electronic display is configured to display one or more images that comprise the secondary alignment feature. 
     
     
         14 . The golf club head of  claim 10 , wherein the portion of the crown containing the electronic display and the electronic display is curved. 
     
     
         15 . The golf club head of  claim 10 , wherein the electronic display comprises an organic light-emitting diode screen. 
     
     
         16 . The golf club head of  claim 10 , wherein the electronic display comprises an e-ink display. 
     
     
         17 . The golf club head of  claim 10 , further including at least one control feature disposed on the golf club head allowing a user to manipulate the electronic display. 
     
     
         18 . The golf club head of  claim 8 , wherein the electronic display is configured to wirelessly communicate with a user operable electronic device. 
     
     
         19 . The golf club head of  claim 18 , wherein the electronic display is configured to receive and display one or more images from the user operable electronic device. 
     
     
         20 . The golf club head of  claim 19 , wherein the one or more images when displayed on the electronic display comprise a secondary alignment feature.