US 12,415,065 B2
Artificial retinal prosthesis for providing color visual perception
Feng-Hsiung Hsu, Hsinchu (TW); Yung-Chan Chen, Hsinchu (TW); Long-Sheng Fan, Hsinchu (TW); and Lee Lin, Hsinchu (TW)
Assigned to IRIDIUM MEDICAL TECHNOLOGY CO., LTD., Hsin-Chu (TW)
Filed by IRIDIUM MEDICAL TECHNOLOGY CO., LTD., Hsinchu (TW)
Filed on Mar. 25, 2022, as Appl. No. 17/704,815.
Application 17/704,815 is a continuation in part of application No. 16/230,218, filed on Dec. 21, 2018, abandoned.
Claims priority of provisional application 62/610,004, filed on Dec. 22, 2017.
Prior Publication US 2022/0211999 A1, Jul. 7, 2022
Int. Cl. A61N 1/05 (2006.01)
CPC A61N 1/0543 (2013.01) 4 Claims
OG exemplary drawing
 
1. An artificial retinal prosthesis to electrically stimulate a retina of an eye by a spatiotemporal electrical stimulation, comprising:
a plurality of pixel group units arranged in an array for inducing perception of different colors, each of the pixel group units comprising a main pixel unit and at least one surrounding pixel unit adjacent to the main pixel unit, which are configured to receive an external visual image entering eyes of the user;
wherein the main pixel unit and the surrounding pixel unit respectively output an electrical stimulation waveform according to a first stimulation cycle and a second stimulation cycle respectively to retinal cells of the user for inducing a color perception;
wherein the first stimulation cycle for the main pixel unit has a first-half duration and a second-half duration after the first-half duration, the first-half duration of the first stimulation cycle has an inactive period which is greater than 20% and less than 80% of the first-half duration, and the rest of the first-half duration is an active period, and the second-half duration of the first stimulation cycle is an inactive period; and
wherein the second stimulation cycle for the surrounding pixel unit has a first-half duration and a second-half duration after the first-half duration, the first-half duration of the second stimulation cycle is an active period and the second-half duration of the second stimulation cycle is an inactive period.