Camera module having auto-focus apparatus

A camera module having an auto-focus apparatus comprising:

• a piezoelectric actuator configured to generate a force for moving a driven member;
• a rod connected to the piezoelectric actuator and configured to transmit the force of the piezoelectric actuator to the driven member;
• a lens barrel having at least one lens;
• a connecting member configured to couple the rod and the lens barrel together by a magnetic force;
• a position detecting sensor configured to detect the position of the lens;
• a CPU configured to calculate the driving value of the piezoelectric actuator, based on a value of the signal detected by the position detecting sensor;
• and
• a driver IC configured to receive the driving value of the piezoelectric actuator calculated by the CPU and to control the driving operation of the piezoelectric actuator.

A camera module having an auto-focus apparatus comprising:

• a piezoelectric actuator configured to generate a force for moving a driven member;
• a rod connected to the piezoelectric actuator and configured to transmit the force of the piezoelectric actuator to the driven member;
• a lens barrel having at least one lens;
• and
• a connecting member configured to couple the rod and the lens barrel together by a magnetic force,
• wherein the connecting member is formed with a rod guide groove corresponding to the rod and the rod is inserted and coupled to the rod guide groove in a movable manner.

A camera module having an auto-focus apparatus comprising:

• a piezoelectric actuator configured to generate a force for moving a driven member;
• a rod connected to the piezoelectric actuator and configured to transmit the force of the piezoelectric actuator to the driven member;
• a lens barrel having at least one lens;
• a connecting member configured to couple the rod and the lens barrel together by a magnetic force;
• a position detecting sensor configured to detect the position of the lens;
• a CPU configured to calculate the driving value of the piezoelectric actuator, based on a value of the signal detected by the position detecting sensor;
• and
• a driver IC configured to receive the driving value of the piezoelectric actuator calculated by the CPU and to control driving of the piezoelectric actuator,
• wherein the connecting member is formed with a rod guide groove corresponding to the rod and the rod is inserted into the rod guide groove.