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    Highly efficient self-oscillation boost DC/DC converter
    82.
    发明授权
    Highly efficient self-oscillation boost DC/DC converter 有权
    高效自激振荡DC / DC转换器

    公开(公告)号：US06597155B2

    公开(公告)日：2003-07-22

    申请号：US09931608

    申请日：2001-08-16

    Applicant: Minchao Huang ,  Yi Chen

    Inventor： Minchao Huang ,  Yi Chen

    IPC: G05F1613

    CPC classification number: H02M3/1582

    Abstract: A self-oscillation DC-DC converter circuit which includes a first transistor electrically connected to an input positive terminal, a second transistor electrically connected to the first transistor and operable to pass a portion of a base current of the first transistor, and a circuit to steady the output voltage electrically connected between the second transistor and an output positive terminal. The output negative terminal is connected directly to the input negative terminal. The self-oscillation DC-DC converter circuit does not use an auxiliary turn, thereby allowing the use of NPN transistors. Positive feedback is achieved by a voltage change Vce1 of the first transistor from a saturation state to a non-saturation state. In the non-saturation state, the second transistor is turned on, the first transistor is turned off and self-oscillation is achieved. With this construction, the self-oscillation DC-DC converter operates normally when the input voltage is lower than 5Vdc.

    Abstract translation: 一种自激振荡DC-DC转换器电路，其包括电连接到输入正端子的第一晶体管，与第一晶体管电连接并可操作以使第一晶体管的基极电流的一部分通过的第二晶体管，以及电路 稳定电连接在第二晶体管和输出正极端子之间的输出电压。 输出负极直接连接到输入负极。 自谐振DC-DC转换器电路不使用辅助转弯，从而允许使用NPN晶体管。 通过第一晶体管的电压变化Vce1从饱和状态到非饱和状态来实现正反馈。 在非饱和状态下，第二晶体管导通，第一晶体管截止并实现自振荡。 通过这种结构，当输入电压低于5Vdc时，自激振荡DC-DC转换器正常工作。

    Card holder
    84.
    外观设计
    Card holder 失效

    公开(公告)号：USD263484S

    公开(公告)日：1982-03-23

    申请号：US113520

    申请日：1980-01-21

    Applicant: Yi Chen

    Designer： Yi Chen

    Protective case for a watch
    85.
    外观设计
    Protective case for a watch 有权

    公开(公告)号：USD1043406S1

    公开(公告)日：2024-09-24

    申请号：US29874326

    申请日：2023-04-18

    Applicant: Yi Chen

    Designer： Yi Chen

    Abstract: FIG. 1 is a front, right and top perspective view of a protective case for a watch, showing my new design;
    FIG. 2 is a rear, left and bottom perspective view thereof;
    FIG. 3 is a front view thereof;
    FIG. 4 is a rear view thereof;
    FIG. 5 is a left side view thereof;
    FIG. 6 is a right side view thereof;
    FIG. 7 is a top plan view thereof; and,
    FIG. 8 is a bottom plan view thereof.
    The broken lines shown in the drawings illustrate portions of the protective case for a watch that form no part of the claimed design.

    Methods, systems, and apparatus for imaging spectroscopy
    86.
    发明授权
    Methods, systems, and apparatus for imaging spectroscopy 有权

    公开(公告)号：US09681798B2

    公开(公告)日：2017-06-20

    申请号：US14933666

    申请日：2015-11-05

    Applicant: Ian W. Hunter ,  Yi Chen

    Inventor： Ian W. Hunter ,  Yi Chen

    IPC: A61B1/06 ,  G01J3/45 ,  G01J3/28 ,  G01J3/02 ,  G01J3/12 ,  G01J3/453

    CPC classification number: A61B1/0638 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/1256 ,  G01J3/2823 ,  G01J3/45 ,  G01J3/453 ,  G01J3/4535

    Abstract: Imaging spectrometers can be used to generate hyperspectral images for medical diagnoses, contaminant detection, and food safety inspections, among other applications. An exemplary imaging spectrometer includes an integrated position sensing array that measures the relative positions of the interferometer components based on an interference pattern generated by illuminating the interferometer with a reference beam. Such an imaging spectrometer includes a processor that controls the interferometer component position by actuating a voice coil and several piezo-electric elements to align the components with respect to each other and to provide a desired optical path length mismatch between the interferometer arms. In some cases, the processor may use feedback and feed forward control, possibly based on the actuators' transfer functions, for more precise positioning. The processor may also implement adaptive and recursive spectral sampling to reduce the image acquisition period.

    Identification techniques and device for testing the efficacy of beauty care products and cosmetics
    89.
    发明授权
    Identification techniques and device for testing the efficacy of beauty care products and cosmetics 有权
    用于测试美容护理产品和化妆品功效的识别技术和装置

    公开(公告)号：US09265461B2

    公开(公告)日：2016-02-23

    申请号：US12872643

    申请日：2010-08-31

    Applicant: Ian W. Hunter ,  Yi Chen ,  Lynette A. Jones ,  N. Catherine Hogan

    Inventor： Ian W. Hunter ,  Yi Chen ,  Lynette A. Jones ,  N. Catherine Hogan

    IPC: A61B5/103 ,  A61B9/00 ,  A61B5/00

    CPC classification number: A61B5/442 ,  A61B5/0048 ,  A61B5/0051 ,  A61B5/0053 ,  A61B5/0055 ,  A61B5/0057 ,  A61B5/441 ,  A61B5/6824 ,  A61B9/00

    Abstract: A method for testing the effect of a skin care product includes measuring a mechanical property of skin tissue using nonlinear stochastic system identification, applying the product to the skin, repeating the measurement of the mechanical property after the application of the product, and comparing the before and after measurements to quantify the effect of the product.Measuring the mechanical property of the skin can include placing a probe against a surface of the skin, perturbing the skin with the probe using a stochastic sequence, and measuring the response of the skin to the perturbation. Perturbing the skin can include indenting the skin with the probe, extending the skin with the probe, and sliding the probe across the skin surface. The mechanical property may be indicative of skin compliance, skin elasticity, skin stiffness, or skin damping. The mechanical property can be dependent on perturbation depth and may be measured at a plurality of anatomical locations.

    Abstract translation: 用于测试皮肤护理产品的效果的方法包括使用非线性随机系统识别来测量皮肤组织的机械性质，将产品施用于皮肤，重复产品施用后的机械性能的测量，并比较之前 并经过测量以量化产品的影响。 测量皮肤的机械性能可以包括将探针放置在皮肤表面上，使用随机序列用探针扰动皮肤，以及测量皮肤对扰动的反应。 刺激皮肤可以包括使用探针压伤皮肤，用探头延伸皮肤，并将探头滑过皮肤表面。 机械性能可以指示皮肤顺应性，皮肤弹性，皮肤刚度或皮肤阻滞。 机械性能可以取决于扰动深度，并且可以在多个解剖位置处测量。

    TIP ACTUATED DISPOSABLE ENDOSCOPE
    90.
    发明申请
    TIP ACTUATED DISPOSABLE ENDOSCOPE 审中-公开
    推动可切除的内窥镜

    公开(公告)号：US20150011830A1

    公开(公告)日：2015-01-08

    申请号：US14355490

    申请日：2011-08-25

    Applicant: Ian W. Hunter ,  Yi Chen ,  Jillian M. Oliveira

    Inventor： Ian W. Hunter ,  Yi Chen ,  Jillian M. Oliveira

    IPC: A61B1/00 ,  A61B1/005

    CPC classification number: A61B1/0016 ,  A61B1/0052 ,  A61B1/0055

    Abstract: The present invention relates to an endoscope having a motorized assembly to control the distal end of an endoscope. Preferred embodiments can include disposable and reusable components. The system reduces the force need to control the tip of the endoscope and thereby reduce the risk of perforation′.

    Abstract translation: 本发明涉及一种具有控制内窥镜前端的机动组件的内窥镜。 优选实施例可以包括一次性和可重复使用的部件。 该系统减少了控制内窥镜尖端的力量，从而降低了穿孔的风险。

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