PRESSURE-SENSING TOUCH SYSTEM UTILIZING OPTICAL AND CAPACITIVE SYSTEMS
    1.
    发明申请
    PRESSURE-SENSING TOUCH SYSTEM UTILIZING OPTICAL AND CAPACITIVE SYSTEMS 有权
    压力感应系统利用光学和电容系统

    公开(公告)号:US20140098058A1

    公开(公告)日:2014-04-10

    申请号:US14044030

    申请日:2013-10-02

    CPC classification number: G06F3/0416 G06F3/0421 G06F3/044

    Abstract: A hybrid touch system that utilizes a combination of a capacitive touch system for position sensing and an optical touch system for pressure sensing is disclosed. The optical touch system includes a transparent sheet having a surface, at least one light source and at least one detector which are operably arranged relative to the transparent sheet to transmit light through the sheet and to detect the transmitted light. Performing position sensing using the capacitive touch system simplifies the pressure-sensing optical touch system.

    Abstract translation: 公开了一种混合触摸系统,其利用用于位置感测的电容式触摸系统和用于压力感测的光学触摸系统的组合。 光学触摸系统包括具有表面的透明片材,至少一个光源和至少一个检测器,其相对于透明片可操作地布置以透射片材并检测透射光。 使用电容式触摸系统执行位置检测简化了压力感应光学触摸系统。

    Liquid lens control systems and methods

    公开(公告)号:US11474284B2

    公开(公告)日:2022-10-18

    申请号:US16500631

    申请日:2018-04-05

    Abstract: Control systems for liquid lenses can use feedback control using one or more measured parameters indicative of a position of the fluid interface in the liquid lens. Capacitance between a fluid and an electrode in the liquid lens can vary depending on the position of the fluid interface. Current mirrors can be used for making measurements indicative of the capacitance and/or the fluid interface position. The liquid lens can be calibrated using the measurements indicative of capacitance and/or fluid interface position as the voltage is driven across an operational range. A control system can use pulse width modulation (PWM) for driving a liquid lens, and a carrier frequency for the PWM signals can be varied to control power consumption in the liquid lens. The slew rate can be adjustable to control power consumption in the liquid lens.

    THERMALLY STRENGTHENED GLASS SHEETS HAVING CHARACTERISTIC MEMBRANE STRESS HOMOGENEITY

    公开(公告)号:US20190039936A1

    公开(公告)日:2019-02-07

    申请号:US16073936

    申请日:2017-01-31

    Abstract: A glass sheet thermally strengthened such that at the first major surface is under compressive stress; the sheet having an a characteristic 2D autocorrelation matrix c(x,y) given by c(x,y)=F−1(F(g)·F̂(g)) where F is a 2D Fourier transform and ̂ represents a complex conjugate operation and g is a high pass filtered data array given by g(x,y)=F−1(F(f(1−F(h)) where h is a spatial 2D low pass filter array and f is a square data array of Shear 0 and Shear 45 data, taken over an area away from any birefringence edge effects on the sheet, wherein an autocorrelation peak maximum width of the matrix c(x,y) at 40% of peak height, for the c(x,y) matrices from both the Shear 0 and Shear 45 data, is between 1 and 5 mm.

    Self-heating liquid lens and self-heating methods for the same

    公开(公告)号:US11927773B2

    公开(公告)日:2024-03-12

    申请号:US16981856

    申请日:2019-03-19

    CPC classification number: G02B3/14 G02B26/005 H05B3/0004

    Abstract: A liquid lens comprising: a lens body including a cavity, a control electrode, and a common electrode; a first liquid disposed within the cavity and in electrical communication with the common electrode; a second liquid disposed within the cavity; an insulating layer in contact with the first liquid and the second liquid and separating the first liquid and the second liquid from the control electrode; and a driver driving a voltage differential across the common electrode and the control electrode, with the first liquid resisting current flow between the common electrode and the control electrode and thereby raising a temperature of the first liquid from a current temperature to a predetermined temperature, which is higher than the current temperature. The driver raises the temperature of the first liquid from the current temperature to the predetermined temperature by increasing a frequency of a voltage waveform of the voltage differential.

    Liquid lens systems
    6.
    发明授权

    公开(公告)号:US11567242B2

    公开(公告)日:2023-01-31

    申请号:US16763439

    申请日:2018-11-15

    Abstract: A liquid lens can be coupled to ground, such as to impede charge from building up in the liquid lens during operation thereof. For example, an electrode that is in electrical communication with a conductive fluid of the liquid lens can be coupled to ground. A switch can be used to selectively couple the liquid lens to ground, such as for discharging the liquid lens. An electrode can be selectively coupled to ground and to driving signals using a switch. In some cases, drive signals can be provided to electrodes other than the grounded electrode for driving the liquid lens. In some cases, the liquid lens can be driven using feedback control based on one or more measured parameters indicative capacitance between a fluid and one or more electrodes in the liquid lens.

    ACTIVE LENS CONTROL SYSTEMS AND METHODS

    公开(公告)号:US20220317343A1

    公开(公告)日:2022-10-06

    申请号:US17615930

    申请日:2020-06-01

    Abstract: A variable focus lens system can include a variable focus lens, one or more electrodes, a signal generator configured to supply voltage to the one or more electrodes to vary the focal length of the variable focus lens, and a controller configured to apply a voltage to the one or more electrodes and receive information indicative of a capacitance that results from the applied voltage. The controller can be configured to determine a temperature of the variable focus lens based at least in part on the capacitance or applied voltage. The variable focus lens system can include a temperature sensor, and the controller can be configured to receive temperature information from the temperature sensor and calibrate the temperature sensor based at least in part on the received temperature information, the applied voltage, and the received capacitance information.

    SELF-HEATING LIQUID LENS AND SELF-HEATING METHODS FOR THE SAME

    公开(公告)号:US20210124094A1

    公开(公告)日:2021-04-29

    申请号:US16981856

    申请日:2019-03-19

    Abstract: A liquid lens comprising: a lens body including a cavity, a control electrode, and a common electrode; a first liquid disposed within the cavity and in electrical communication with the common electrode; a second liquid disposed within the cavity; an insulating layer in contact with the first liquid and the second liquid and separating the first liquid and the second liquid from the control electrode; and a driver driving a voltage differential across the common electrode and the control electrode, with the first liquid resisting current flow between the common electrode and the control electrode and thereby raising a temperature of the first liquid from a current temperature to a predetermined temperature, which is higher than the current temperature. The driver raises the temperature of the first liquid from the current temperature to the predetermined temperature by increasing a frequency of a voltage waveform of the voltage differential.

    LIQUID LENS CONTROL SYSTEMS AND METHODS
    9.
    发明申请

    公开(公告)号:US20200096678A1

    公开(公告)日:2020-03-26

    申请号:US16500627

    申请日:2018-04-05

    Abstract: Control systems for liquid lenses can use feedback control using one or more measured parameters indicative of a position of the fluid interface in the liquid lens. Capacitance between a fluid and an electrode in the liquid lens can vary depending on the position of the fluid interface. Current mirrors can be used for making measurements indicative of the capacitance and/or the fluid interface position. The liquid lens can be calibrated using the measurements indicative of capacitance and/or fluid interface position as the voltage is driven across an operational range. A control system can use pulse width modulation (PWM) for driving a liquid lens, and a carrier frequency for the PWM signals can be varied to control power consumption in the liquid lens. The slew rate can be adjustable to control power consumption in the liquid lens.

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