A micro-sized photo detectable stimulator array for retinal prosthesis by distributed sensor network approach

In this paper, we propose a flexible retinal prosthesis device by a distributed sensor network approach. The novel point of the proposed device is that the flexible stimulator consists of micro-sized CMOS devices linked in network. The micro-sized CMOS device consists of single-wire serial interface, a photo detector with pixel-level ADC, an image processing circuit, a current DAC and a current stimulator. The device is fabricated in a 0.6 μm CMOS technology and the device size is 500 μm × 500 μm. The function of the prototype device is tested successfully.