JAJSF42B April 2018 – June 2019 DLPC3478
For 3D sources on the parallel interface, images must be frame sequential (L, R, L, ...) when input to the DLPC3478. Any processing required to unpack 3D images and to convert them to frame sequential must be done by external electronics prior to inputting the images to the DLPC3478. Each 3D source frame input must contain a single eye frame of data separated by a VSYNC where an eye frame contains image data for a single left or right eye. The signal 3DR input to the DLPC3478 tells whether the input frame is for the left eye or right eye.
Each DMD frame displays at the same rate as the input interface frame rate. Typical timing for a 50-Hz or 60-Hz 3D HDMI source frame, the input interface of the DLPC3478, and the DMD is shown in Figure 9. GPIO_04 is optionally sent to a transmitter on the system PCB for wirelessly transmitting a sync signal to 3D glasses. The glasses are then in phase with the DMD images being displayed. Alternately, 3-D Glasses Operation shows how DLP Link pulses can be used instead.