Lamp unit of vehicle headlamp

A lamp unit of a vehicle headlamp comprising:

• a projector lens arranged on an optical axis extended in a front and rear direction of a vehicle;
• a light source arranged on a rear side of a rear side focal point of the projector lens;
• a reflector that reflects light from the light source in a front direction to be proximate to the optical axis;
• and
• a shade that shields a portion of light reflected from the reflector,
• wherein at least a portion of a surface of the projector lens is constituted as an up and down direction diverging portion including a plurality of lens elements extended substantially in a horizontal direction by a vertical sectional shape formed in a recessed and projected shape relative to a reference face of the surface,
• wherein the up and down direction diverging portion comprises an upper region and a lower region, and wherein a center region having a surface shape serving as the reference face is provided between the upper region and lower region,
• wherein the upper region comprises a first upper section and a second upper section, wherein the recessed and projected shape of the first upper section is smaller than the recessed and projected shape of the second upper section,
• wherein the lower region comprises a first lower section and a second lower section, wherein the recessed and projected shape of the first lower section is smaller than the recessed and projected shape of the second lower section, and
• the first upper section and first lower section are provided next to the center region.