Optical touch device

An optical touch module used to connect to at least one L-shaped connection board, the optical touch module comprising:

• an LED circuit board having a first top face and a first bottom face, multiple LED components being disposed on the first top face, the first bottom face having at least one first connector;
• and
• a control circuit board positioned under the LED circuit board, the control circuit board having a second top face and a second bottom face, the second top face facing the first bottom face of the LED circuit board and having at least one second connector correspondingly in adaptation to the first connector, the second bottom face having at least one third connector connecting to the L-shaped connection board, the first and second connectors being vertically mated with each other so as to connect the control circuit board under the LED circuit board, a height gap existing between the LED circuit board and the control circuit board, whereby a space is positioned between correspondingly overlapping sections of the first bottom face of the LED circuit board and the second top face of the control circuit board, the first and second connectors being positioned in the space.