90 results about "Visual prosthesis" patented technology

The invention discloses a visual prosthesis image acquisition device which comprises an eye movement acquiring and processing module, a camera and a rotating cradle head. The eye movement acquiring and processing module is used for acquiring an eye movement signal of an eyeball and sending a control signal according to the signal to control the rotation of the rotating cradle head so as to ensure the camera fixed on the rotating cradle head to turn to the rotation direction of the eyeball and acquire an image in the direction, wherein the eye movement acquiring and processing module comprises an eye movement camera for shooting a video of movement of a pupil of the eyeball and an eye movement video receiving and processing unit for receiving the video and acquiring the rotation direction of the eyeball by the video. According to the invention, by acquiring the rotation direction of the eyeball in real time so as to control the rotating cradle head to drive the camera to turn to the direct and acquire the image in the direction, the biomimetics on human vision and eye movement functions is well implemented, so that a user acquires the prosthesis visual experience closer to the normal vision.

The present invention is an electrode array for neural stimulation. In particular it is an electrode array for use with a visual prosthesis with the electrode array suitable to be positioned on the retina. The array includes multiple attachment points to provide for even pressure across the electrode array surface. The attachment points are arranged so as to not damage retinal tissue stimulated by the electrode array.

A wireless energy and data transmission system for visual prostheses in the technical field of biomedical engineering, including: an external wireless device located outside the body, an internal wireless device located inside the body, and a data reverse transmission module. The external wireless device receives encoded images After the signal is modulated, it is transmitted wirelessly to the wireless device in the body. The wireless device in the body rectifies and demodulates and receives the driving power and the received signal respectively. The data reverse transmission module monitors the impedance and temperature information in the body, and transmits the data to the external coil through the internal coil , the external reverse demodulation circuit recovers the impedance and temperature information, and the external device adjusts the input power according to the state in the body. The invention has the characteristics of simple circuit, small volume, high efficiency and the like.

The present invention is an electrode array for neural stimulation suitable to be attached to neural tissue such that the attachment point acts as a fulcrum like point and contact with an end of the array body presses the other end of the array body into the neural tissue to be stimulated. This invention is particularly useful in a retinal electrode array for a visual prosthesis. By curving an electrode portion of an array body to approximate but not exceed (never more tightly curved) the curvature of the retina and applying force to the array by external means at the fulcrum like point, approximately even pressure across all electrodes is achieved.

An improved prosthesis and method for stimulating vision nerves to obtain a vision sensation that is useful for the patient that has lost vision due to AMD, RP, and other diseases. The invention utilizes infrared light to cause action potentials in the retinal nerves similar to those which result from rods and cones stimulated by visible light in healthy retinas. In some embodiments, the invention provides a prosthesis that generates a stimulation pattern of infrared light from an external stimulator array through the eye and focusing the stimulation pattern of infrared light on the retina, especially the fovea. Some embodiments the invention provides improved resolution down to a group of nerves, or even the individual nerve level, with sufficient energy density so as to cause a desired action potential.

The present invention is a visual prosthesis for the restoration of sight in patients with lost or degraded visual function. The visual prosthesis includes means for sending operational data from an implantable visual prosthesis to an external unit. Such operational data may include electrode current, voltage or capacitance, power received by the internal unit, and recording of neural activity.

The invention discloses a binocular image acquisition and preprocessing device and a method used for a visual prosthesis. The device comprises left and right miniature cameras and an image preprocessing device. The left and right miniature cameras synchronously collect video information in real time and output the collected video information to the image preprocessing device for image fusion, significant target extraction and other preprocessing. And then, a position, a distance and contour information of a significant target are further calculated. In the scheme, on one hand, the left and right miniature cameras are used to collect the image, and the image preprocessing device preprocesses the image; through using an advantage of double cameras, a general orientation and distance information of the significant target in a visual field are calculated, and the above information is important for a blind person and is also ignored by other correlation patents; on the other hand, conversion and information transmission are performed on significant target information in the visual field, and secondary information is neglected so that a calculated amount of a subsequent image coding module can be greatly reduced, and an operation speed of the visual prosthesis is increased.

A touch-based simulated false-vision positioning system in the technical field of visual prostheses comprises a helmet display, an auxiliary head positioning device, a touch screen, a computer, a touch navigation device and a touch panel. Firstly, the helmet display which is used as a stimulating source provides simulated false vision stimulation; with the auxiliary head fixing device, the head of a user is fixed opposite to where the touch screen is fixed; simulated false-vision generating software with an appropriate stimulating mode is selected and facilitates the computer to produce simulated false vision; after judging the positions of simulated false visions in the helmet display, the user points out the localization on the touch screen with the help of the touch navigation device or the touch panel; after feedback data is processed with corresponding software, analysis and evaluation on information such as localization accuracy, dispersion, etc. of simulated false visions sensed by touch can be obtained.