The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
To reduce the unfavorable influence of phosphene array irregularity on the form of Chinese character pattern so as to improve recognition accuracy in visual prostheses, two correction methods were put forward. One method was to generate phosphene closest to the target point in regular arrays using weighted nearest neighbor search. The other was to generate phosphene whose center located in the region...
This paper addresses a method of simulated phosphene's size estimation based on tactile perception. To evaluate the size matching of the simulated phosphenes, subjects are in a simulated artificial visual environment and use a size matching tactile board to match the size with the phosphenes that they observe. Three phosphene distributions (Uniform, Gaussian I and Gaussian II) of the simulated phosphene...
A novel processing and control design of neuro-stimulator in visual prostheses based on optic nerve stimulation is proposed in this paper. The design is capable of controlling the electrodes drivers with the style of subboard and mainboard to generate biphasic stimulus current with different patterns.
A micro-stimulator design for visual prosthesis based on optic nerve stimulation is presented in this paper. The micro-stimulator is designed to control 64 electrodes, offer single pulse or multiple pulses train which are variable range such as from 1 muA to 2 mA current amplitudes, from 20 mus to 400 mus duration, from 0 to 350 Hz frequency. The micro current pulses transmitting to the penetrating...
More recent studies show that electrical micro-stimulation of the retina or cortex produces visual sensations in blinds subjects. However, with current electrode array technologies, it is nearly impossible to cover entire visual field by electrically stimulating the retina or visual cortex. In the visual pathway, by stimulating optic nerve, the entire visual filed is represented in such a relatively...
A micro-stimulator circuitry designed for visual prosthesis based on optic nerve stimulation is presented in this paper. This micro-stimulator is capable of providing a wide range of biphasic current pulses with an amplitude from several muA up to 4 mA, a pulse width from 20 musec up to over four hundred musec, and a pulse frequency up to over three hundred Hz. The micro current pulses transmitting...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.