PURPOSE: To make small the transmitter and to enable to operate the receiver at remote location, by enabling the transmission and recetption of two dimensional displacement information with wireless by using joy stick.

CONSTITUTION: By using the joy stick JS providing potentiometers Va, Vb detecting the two dimensional displacement, and the change in the potentiometers is converted into digital amount with the A/D converters ADa and ADb. The digital amount is tentatively stored in the registers Ra, Rb, and the output is stored in the one bit registers r1, r2. The operation of the joy stick JS is written in with the write- in switch SW, the turning on of the switch SW is detected with the detection circuit JW, and the output is fed to the sequential control circuit PC1. Based on the control of the circuit PC1, the two dimensional displacement information of the registers ra, rb is fed to the drive circuit DR and the light emission section is driven with the circuits PC1 and DR. Further, the transmitter is made small in size suitable for portable use.