A Wearable LED Television

The Video Coat is a color TV set built into a lab coat. It is a 160×120 pixel color LED display, built on flex boards.This television set displays regular NTSC video. The TV is driven by circuit boards on the shoulders and hips.The display strips are narrow flex boards, joined by flat flex cables.Each display strip has six Allegro A6282 chips in tiny QFN packages, tucked in between the clusters of three 0603 chip LEDs. The display strips have four columns, each of which has a separate power bus. So four LEDs are driven by the same LED driver pin. A Xilinx FPGA converts the YCrCb signal from the TVP5154 video digitizer into four RGB serial data streams.  

There is an NTSC video input on an RCA jack, and a USB  jack to charge the video iPod that plays the source material. Ethernet cables carry the LVDS serial data to the scan boards.The scan boards each have an FPGA, DC-DC converters and some connectors. There are four column driver transistors to reduce the number of LED driver chips needed. Power is supplied by two 11.1V, 5 Amp-hour R/C LiPo packs. Battery run time is about an hour.


source:www.cathodecorner.com