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Flexible artificial retina stimulation chip

A retinal and artificial technology, applied in artificial respiration, physical therapy, electrotherapy and other directions, it can solve the problems of small resolution and inability to distinguish small objects, etc., and achieve the effect of high tuning accuracy.

Active Publication Date: 2020-09-01
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first-generation retinal chip uses stimulation signals to stimulate the optic nerve, allowing blind people with damaged retinas to see images, but because the chip has only 16 pixels of resolution, the resolution is too small, so smaller objects cannot be distinguished

Method used

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  • Flexible artificial retina stimulation chip
  • Flexible artificial retina stimulation chip
  • Flexible artificial retina stimulation chip

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Embodiment Construction

[0018] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown in the drawings.

[0019] In the following, many specific details of the present invention are described, such as device structures, materials, dimensions, processing techniques and techniques, for a clearer understanding of the present invention. However, the invention may be practiced without these specific details, as will be understood by those skilled in the art.

[0020] figure 1 A schematic diagram of the circuit topology of the flexible artificial retina stimulating chip of the present invention is shown.

[0021] Such as figure 1 As shown, the circuit includes modules such as a stimulation unit 200 , a timing control circuit 300 ...

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Abstract

The invention belongs to the field of integrated circuits and biomedicine, and particularly relates to a flexible artificial retina stimulation chip. The chip can convert an optical signal into an electric signal and stimulate optic nerves to form vision, is made of a flexible film material and is suitable for a human body. The circuit is a retinal stimulation unit array and comprises m rows and ncolumns of stimulation units, a digital-to-analog converter and two constant bias circuits. Each stimulation unit is used for carrying out time division multiplexing on an output signal of the digital-to-analog converter by adopting an analog random access memory (ARM, AnalogRandom Access Memory) and a time sequence control circuit (Time Control), so as to adjust the conducting state of a transistor in the stimulation unit and stimulate the perception of a human body to an optical signal. The digital-to-analog converter has 8-bit resolution and is high in control precision. And time sequencesare provided among the stimulation units by adopting the time sequence control circuit. The chip can provide help for visually impaired people to recover vision.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits and biomedicine, and in particular relates to a flexible artificial retina stimulation chip. Background technique [0002] The retina is an important part of the human body to produce vision. After the light signal is processed by the photoreceptor cells of the retina and the optic nerve, it forms the excitation of the optic nerve, and is transmitted to the central optic nerve of the brain to produce vision. If retinal necrosis or lesions will seriously affect the lives of patients, a large part of blind patients in my country are caused by diseases caused by outer retinal degeneration, such as retinitis pigmentosa (RP) and age-related macular degeneration (AMD), through drug therapy Or surgery is difficult to restore vision. Restoring vision to patients by implanting microelectronic devices is a potential solution. In patients with retinitis pigmentosa and age-related macular degener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/36
CPCA61N1/36046
Inventor 马顺利吴天祥
Owner FUDAN UNIV
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