[DK2 HMD Teardown (1)] Web-like FPC Board
The "DK2," the second version of the "Oculus Rift" head-mounted display (HMD) of Oculus VR Inc, was released in July 2014. Nikkei Electronics Teardown Squad obtained the HMD to look inside it.
This is the first time that we have torn down an HMD. Wondering where to start, we found screws near a lens on the side to be in contact with the user's face.
After removing the screw, we took out the rear half of the HMD. The rear unit is used to fix the user's head. It has cushion materials, etc but no electronic parts. To see the display and main board, we had to open the front unit.
At a glance, there seemed to be no screw on the front unit. After failing to open it by sheer force, we calmed ourselves and stared at the unit. Then, we found a part that seemed to cover a screw on each of the four corners of the front unit (on the side to be in contact with the user's face). We removed the part with a pair of tweezers, applied light to the hole and found what looked like a screw hole. We took out the screw with a Phillips head screwdriver.
Inside the front unit, there was a flexible printed circuit (FPC) board attached to the case like a web. The FPC board is for connecting infrared LEDs for location detection and the main board. The number of infrared LEDs was 40. Also, the words "Oculus VR" were printed on the FPC board.