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    • 1. 发明授权
    • Method for preferential outer retinal stimulation
    • 优良外视网膜刺激的方法
    • US5944747A
    • 1999-08-31
    • US041932
    • 1998-03-13
    • Robert J. GreenbergMark S. HumayunEugene de Juan, Jr.
    • Robert J. GreenbergMark S. HumayunEugene de Juan, Jr.
    • A61F9/08A61N1/36A61N1/32
    • A61N1/36046
    • A method of focused phosphene generation through deeper intermediate retinal cellular electrical stimulation to the exclusion of direct ganglion cellular electrical stimulation comprises the steps of: a) positioning a stimulating electrode in the vicinity of retinal tissue; and b) applying a long duration stimulation signal to the electrode such that deeper intermediate retinal cells are preferentially stimulated over the retinal ganglion cells and proximal overlying surface axons. The long duration stimulation signal is preferably a biphasic signal having a negative and a positive phase pulse which is applied in cathodic fashion. To preferentially stimulate the deeper intermediate retinal elements the duration of the long duration stimulation signal is greater than 0.5 millisecond per phase pulse, and preferably equal to or longer than 2 millisecond per phase pulse. The biphasic signal is preferably adjusted to simulate a monophasic signal by adjusting the magnitude of the negative pulse in relation to positive pulse, and by adjusting the duration of the positive pulse in relation to the negative pulse to maintain approximately net zero charge introduction. Preferably, the ratio of the negative pulse to the positive pulse is approximately 10:1 or greater.
    • 通过更深的中间视网膜细胞电刺激产生聚焦磷酸的方法排除直接神经节细胞电刺激包括以下步骤:a)将刺激电极定位在视网膜组织附近; 和b)对电极施加长时间刺激信号,使得较深的中间视网膜细胞优先在视网膜神经节细胞和近侧上表面轴突上被刺激。 长持续时间刺激信号优选是具有以阴极方式施加的负相和正相脉冲的双相信号。 为了优先地刺激较深的中间视网膜元件,长时间刺激信号的持续时间大于每相脉冲0.5毫秒,并且优选地等于或大于每相脉冲2毫秒。 优选地调节双相信号以通过相对于正脉冲调整负脉冲的幅度,并通过相对于负脉冲调整正脉冲的持续时间来维持近似净零电荷引入来模拟单相信号。 优选地,负脉冲与正脉冲的比率为大约10:1或更大。
    • 2. 发明授权
    • Visual prosthesis and method of using same
    • 视觉假体及其使用方法
    • US5935155A
    • 1999-08-10
    • US41933
    • 1998-03-13
    • Mark S. HumayunEugene de Juan, Jr.Robert J. Greenberg
    • Mark S. HumayunEugene de Juan, Jr.Robert J. Greenberg
    • A61F2/14A61F9/08A61N1/05A61N1/36F16L19/02
    • A61N1/36046A61M39/1011A61M5/3213A61M2039/1033A61M39/10A61N1/0543
    • A visual prosthesis comprises a camera for perceiving a visual image and generating a visual signal output, retinal tissue stimulation circuitry adapted to be operatively attached to the user's retina, and wireless communication circuitry for transmitting the visual signal output to the retinal tissue stimulation circuitry within the eye. To generate the visual signal output the camera converts a visual image to electrical impulses which are sampled to selecting an image at a given point in time. The sampled image signal is then encoded to allow a pixelized display of it. This signal then is used to modulate a radio frequency carrier signal. A tuned coil pair having a primary and a secondary coil are used to transmit and receive the RF modulated visual signal which is then demodulated within the eye. The retinal stimulation circuitry includes a decoder for decoding the visual signal output into a plurality of individual stimulation control signals which are used by current generation circuitry to generate stimulation current signals to be used by an electrode array having a plurality of electrodes forming a matrix. The intraocular components are powered from energy extracted from the transmitted visual signal. The electrode array is attached to the retina via tacks, magnets, or adhesive.
    • 视觉假体包括用于感知视觉图像并产生视觉信号输出的相机,适于可操作地附接到用户视网膜的视网膜组织刺激电路,以及用于将视觉信号输出传输到视网膜组织刺激电路内的视觉信号输出 眼。 为了产生视觉信号输出,相机将视觉图像转换成电脉冲,其被采样以在给定时间点选择图像。 然后对采样的图像信号进行编码以允许其像素化显示。 该信号然后被用于调制射频载波信号。 使用具有初级线圈和次级线圈的调谐线圈对来发射和接收RF调制的视觉信号,然后在眼睛内对其进行解调。 视网膜刺激电路包括解码器,用于将视觉信号输出解码为多个单独的刺激控制信号,所述多个个体刺激控制信号由当前生成电路用于产生刺激电流信号以由具有形成矩阵的多个电极的电极阵列使用。 眼内组件由从传输的视觉信号中提取的能量供电。 电极阵列通过钉,磁体或粘合剂附着到视网膜上。
    • 3. 发明授权
    • Retinal microstimulation
    • 视网膜微刺激
    • US5109844A
    • 1992-05-05
    • US595442
    • 1990-10-11
    • Eugene de Juan, Jr.Mark S. HumayunD. Howard Phillips
    • Eugene de Juan, Jr.Mark S. HumayunD. Howard Phillips
    • A61N1/36A61N1/372
    • A61N1/0543A61N1/36046A61N1/37205
    • A method for stimulating a retinal ganglion cell in a retina without penetrating the retinal basement membrane at the surface of the retina comprises: (a) positioning a ganglion cell stimulating electrode on or above the retinal basement membrane; (b) providing a ground electrode in operative association with the ganglion cell stimulating electrode, with the ground electrode positioned on or above the retinal basement membrane and positioned for capturing electric current produced by the stimulating electrode; and (c) applying a voltage to said stimulating electrode sufficient to produce an electric current which penetrates the retina and produces an action potential in a retinal ganglion cell. Apparatus for practicing the foregoing method is also disclosed.
    • 用于刺激视网膜中视网膜神经节细胞而不穿透视网膜表面的视网膜基底膜的方法包括:(a)将神经节细胞刺激电极定位在视网膜基底膜上或上方; (b)提供与神经节细胞刺激电极可操作关联的接地电极,其中接地电极位于视网膜基底膜上或上方,并定位成用于捕获由刺激电极产生的电流; 和(c)向所述刺激电极施加足以产生穿透视网膜并在视网膜神经节细胞中产生动作电位的电流的电压。 还公开了用于实施上述方法的装置。