ieee format for artificial retina using thin film transistors
#1

ieee format for ARTIFICIAL RETINA USING THIN FILM TRANSISTOR
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#2
artificial retina is developed for the disabled to people, so that they can retrieve their view. It was developed with the help of external camera (cameras) who worked as a stimulus from view of the brain through electrodes. The device has been used as a substitute for the cells in the retina of the eye. They have been formulated using large-scale integration third dimension, so that a person can receive the exact image of an object that is in front of them.


The artificial retinas function using thin-film transistors and capacitors. This device is implanted near the retina blind spot, so that the photo of received damaged may be replaced with this advanced device. This device is implanted within the human eye in two ways that are:



The artificial retina is perfect using the inductively coupled wireless power. There are only two needed to wire supply main units which are the power and the power transmitter system. The units are made of bio-compatible, so that they can be placed inside of the human eye. After that, the power system must be implanted. When the retina is implanted inside the eyeball so the generator are not stable during this period, the reason is probably that the manufacture, the presence of a parasite or the noise produced during the implementation. Therefore, during the functioning of the retina, the surgeon must ensure that the retina may be placed under unstable or power.
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#3
We have evaluated an artificial retina using thin-film transistors driven by wireless power supply. It is found that the illumination profile can be correctly detected as the output voltage profile even if it is driven using unstable power source generated by inductive coupling, diode bridge, and Zener diodes. This means the feasibility to implant the artificial retina into human eyeballs.

Artificial retinas have been desired to recover the sight sense for sight handicapped people. Recently, artificial retinas using external cameras, stimulus electrodes, and three dimensional large scale integrations (LSIs) have been actively developed for patients suffering from retinitis pigmentosa and age related muscular degeneration. So in this seminar, we will discuss about the possibilities of artificial retina using thin film transistors (TFTs), which can be fabricated on transparent and flexible substrates. Electronic photo devices and circuits are integrated on the artificial retina, which is implanted on the inside surface of the living retina at the back part of the human eyeballs. In addition wireless power supply is used to drive the object. This helps to eliminate the connection wires and to realize complete artificial internal organs to improve the quality of life.

Artificial retinas have been ardently desired to recover the sight sense for sight handicapped people. Here electronic photo devices and circuits substitute for deteriorated photoreceptor cells. These devices are implanted inside the eyes. The implanting is classified mainly into two types epiretinal implant and subretinal implant about which we will be discussing in the later chapters.

In this Seminar we will be discussing about the Artificial Retina made using Thin-Film Transistors, which can be fabricated on transparent and flexible substrates. Electronic photo devices and circuits are integrated on the artificial retina, which is implanted on the inside surface of the living retina at the back part of the human eyeballs. Since the irradiated light comes from one side of the artificial retina and the stimulus signal goes out of the other side, the transparent substrate is preferable. Moreover, since the human eyeballs are curved, the exible substrate is also preferable.

It is possible to make spherical shape by designing a petal-like pattern. As a result, the artificial retina using TFTs are suitable for the epiretinal implant on the curved human eyeballs. The artificial retina using TFTs is fabricated using annealing. Earlier wired power supply were used to drive the artificial retina using TFTs to ensure reliable operations However, the wired power supply harms quality of life of the sight-handicapped people because of bothersome connection wires between the artificial retina and external equipments. Therefore, wireless power supply is requisite to eliminate the connection wires and to realize complete artificial internal organs to improve the quality of life.

Retinal prosthesis

Blindness is one of the most devastating consequences of disease. We develop electronic artificial retina for restoration of sight to patients suffering from degenerative retinal diseases such as Retinitis Pigmentosa and Age-Related Muscular Degeneration. In these conditions the photoreceptor cells slowly degenerate, leading to blindness. However, many of the inner retinal neurons that transmit signals from the photoreceptors to the brain are preserved to a large extent for a prolonged period of time. Foerster was the first to discover that electrical stimulation of the occipital cortex could be used to create visual percepts, phosphenes. Implantable microelectronic retinal prostheses represent a promising means of restoring sight to the blind. The conventional model of such devices includes an externally worn digital camera which samples the wearers visual environment. This stream of visual information is then processed before being conveyed via wireless to an implanted neuro stimulator connected to an array of electrodes placed within or adjacent to the retina. Electrical stimuli are thereby delivered to the surviving neurons of the retina to effect the perception of phosphenes.
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