ANGLE SENSING TYPE COMMAND INPUT APPARATUS, CONTACTLESS JOYSTICK AND ANGLE SENSING COMMAND INPUT METHOD

The present invention relates to an angle sensing type command input system capable of performing a command by recognizing a direction of an object, a contactless joystick and to an angle sensing command input method. The angle sensing type command input system includes a light emitting device which irradiates an object with detection light; a light receiving device which receives reflected light reflected from the object by the detection light; and a determination unit which outputs command determination signals according to sensing areas of the object based on signals sensed by the light receiving device. The light receiving device includes: a first photodiode which has a height at which an amount of passed light varies at least according to angles, and which can sense quantity of light in a first region biased to one side of light passing through between a plurality of first slits using first partitions having the first slits which are provided in a line in a first direction, and quantity of light in a second region biased to the other side; a second photodiode which is provided to be connected to the first photodiode, and which has a height at which an amount of passed light varies at least according to angles, and which can sense quantity of light in a third region biased to one side of light passing through between a plurality of second slits using second partitions having the second slits which are provided in a line in a second direction, and quantity of light in a fourth region biased to the other side.