The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 2010
Filed:
Dec. 19, 2005
Heinz-gerhard Graf, Magstadt, DE;
Alexander Dollberg, Dortmund, DE;
Bernd Hoefflinger, Sindelfingen, DE;
Wilfried Nisch, Tuebingen, DE;
Hugo Haemmerle, Tuebingen, DE;
Alfred Stett, Reutlingen, DE;
Martin Stelzle, Reutlingen, DE;
Eberhart Zrenner, Tuebingen, DE;
Heinz-Gerhard Graf, Magstadt, DE;
Alexander Dollberg, Dortmund, DE;
Bernd Hoefflinger, Sindelfingen, DE;
Wilfried Nisch, Tuebingen, DE;
Hugo Haemmerle, Tuebingen, DE;
Alfred Stett, Reutlingen, DE;
Martin Stelzle, Reutlingen, DE;
Eberhart Zrenner, Tuebingen, DE;
Retina Implant AG, Reutlingen, DE;
Abstract
An active retina implant has a multiplicity of pixel elements that convert incident light into electric stimulation signals for cells of the retina with which stimulation electrodes are to make contact. Each pixel element is provided with at least one image cell that converts incident light into electric signals, there being provided at least one amplifier whose input is connected to the image cell and whose output is connected to at least one stimulation electrode to which it supplies a stimulation signal. Also provided is an energy supply which provides externally coupled external energy as supply voltage for the image cells and the amplifiers. The image cell has a logarithmic characteristic according to which incident light of specific intensity is converted into electric signals of specific amplitude. The stimulation signal is supplied in the form of analog voltage pulses of specific pulse length and pulse spacings, the pulse amplitude being a function of the intensity of the incident light.