TOF camera device and method of driving the same

A method of driving a time of flight (TOF) camera device, comprising:

• generating a pulse signal;
• emitting output light in a first frame through an opening to a first area of at least one object in response to the pulse signal, wherein a size of the opening determines a projected area of light on the at least one object;
• receiving reflected light when the output light is reflected by the at least one object for the first frame;
• generating a distance data signal from the received reflected light;
• generating a light density control signal based on the distance data signal;
• changing the size of the opening through which the output light is emitted in a second frame based on the light density control signal;
• and
• emitting the output light through the opening to a second area of the at least one object, wherein the second area is different from the first area.

A method of driving a time of flight (TOF) camera device, comprising:

• emitting, by a light module, first output light to a first area of a first object for a first frame;
• changing an area, to which the first output light is emitted to the first object, from the first area to a second area based on first reflected light reflected by the first object for the first frame;
• emitting, by the light module, second output light to a third area of a second object for a second frame subsequent to the first frame;
• and
• changing an area, to which the second output light is emitted to the second object, from a third area to a fourth area based on second reflected light reflected by the second object for the second frame,
• wherein a size of the second area is different from a size of the fourth area.