Patent ID: 6937407

Claim:
A transmission device for a two dimensional (2D) image display module having a box with a top opening, a lens received in the box, a backboard sandwiched between a bottom face defining the top opening of the box and the lens and an image sandwiched between the lens and the backboard, the transmission device comprising: rods adapted to be arranged along a contour of the box; a transmission element slidably mounted around the rods; a motor adapted to be securely mounted in the box and having a disk rotatably connected to a motor shaft, a driving rod eccentrically formed on top of the disk and a driving board provided with a slot defined to receive therein the driving rod, distal ends of the transmission element are securely connected to the driving board; and at least one securing member securely connected to the transmission element to be adapted to connect to the backboard, whereby rotation of the driving rod due to activation of the motor is able to drive the driving board to move a first direction, which drives the backboard to move via the transmission element and the securing member in a second direction opposite to the first direction so that the image is revealed as a result of relative movement between the backboard and the lens.