Pattern projecting lamp of motor vehicle

A pattern projecting lamp of a motor vehicle comprising:

• an optical module configured to provide a projection light beam having a pattern, wherein the optical module comprises:
• a light source arranged to emit a light beam,
• a printed circuit board on which the light source is disposed,
• a first lens arranged to collimate the light beam emitted by the light source, and
• a patterning apparatus arranged to form a pattern in a cross section of the collimated light beam, in order to generate the projection light beam having the pattern;
• and
• a support comprising a base and a rotary arm connected rotatably to the base;
• wherein the rotary arm is accommodated in the base, wherein the rotary arm further comprises a rotation shaft, and the base further comprises a supporting member for supporting the rotation shaft, such that the rotation shaft is rotatable at the supporting member;
• wherein the support further comprises an electric motor, the electric motor being arranged to drive the rotation shaft to drive the rotary arm to rotate;
• wherein the patterning apparatus is a light intensity modulating film, which has a first part and a second part having different transmittances for the light beam, in order to form the pattern in the cross section of the light beam that has passed through the light intensity modulating film.