Visual prosthesis

专利名称：Visual prosthesis

发明人：MARK S. HUMAYUN,EUGENE DE JUAN

JR.,ROBERT J. GREENBERG

申请号：AU3077099申请日：19990311公开号：AU3077099A公开日：19990927

摘要：A visual prosthesis comprises a camera for perceiving a visual image andgenerating a visual signal output, retinal tissue stimulation circuitry adapted to beoperatively attached to the user's retina, and wireless communication circuitry fortransmitting the visual signal output to the retinal tissue stimulation circuitry within theeye. To generate the visual signal output the camera converts a visual image to electricalimpulses which are sampled to selecting an image at a given point in time. The sampledimage signal is then encoded to allow a pixelized display of it. This signal then is used tomodulate a radio frequency carrier signal. A tuned coil pair having a primary and asecondary coil are used to transmit and receive the RF modulated visual signal which isthen demodulated within the eye. The retinal stimulation circuitry includes a decoder fordecoding the visual signal output into a plurality of individual stimulation control signalswhich are used by current generation circuitry to generate stimulation current signals tobe used by an electrode array having a plurality of electrodes forming a matrix. Theintraocular components are powered from energy extracted from the transmitted visualsignal. The electrode array is attached to the retina via tacks, magnets, or adhesive.

申请人：JOHNS HOPKINS UNIVERSITY

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