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    • 2. 发明公开
    • A method, device and system for reducing speckle contrast
    • Verfahren,Vorrichtung und System zur Verringerung des Specklekontrasts
    • EP2322957A1
    • 2011-05-18
    • EP09175783.1
    • 2009-11-12
    • poLight AS
    • Kartashov, VladimirAkram, Muhammad Nadeem
    • G02B5/18G02B27/48
    • G02B27/48G02B5/1828G02F1/292G02F1/315G02F2201/305
    • The present invention relates to a device and system for improving a laser light based imaging projection system, and especially to a device and system for controlling speckle contrast in laser light imaging projection systems according to a specific speckle reduction scheme. A device and system according to the present invention comprises at least on spatial light modulator with a programmable grating geometry on a reflective surface of the device. A series of control signals can then provide a static speckle pattern or a plurality uncorrelated speckle patterns. The device and system according to the present invention can utilize the programmable grating feature to decrease, or increase the speckle in whole images or parts of images being projected in the system.
    • 本发明涉及一种用于改进基于激光的成像投影系统的装置和系统,特别涉及一种根据特定的散斑减少方案来控制激光成像投影系统中的斑点对比度的装置和系统。 根据本发明的装置和系统至少包括在装置的反射表面上具有可编程光栅几何形状的空间光调制器。 一系列控制信号可以提供静态散斑图案或多个不相关的散斑图案。 根据本发明的装置和系统可以利用可编程光栅特征来减少或增加在整个图像中或在系统中投射的图像的部分的斑点。
    • 5. 发明公开
    • ELECTRONIC CIRCUIT FOR CONTROLLING CHARGING OF A PIEZOELECTRIC LOAD
    • 控制压电负载充电的电子电路
    • EP3190637A1
    • 2017-07-12
    • EP16150334.7
    • 2016-01-06
    • PoLight AS
    • Svortdal, Tore
    • H01L41/04G02B26/08
    • H02N2/065G02B26/0875H01L41/042H02M3/07H02N2/026
    • The invention relates to an electronic circuit (100) for controlling charging of a piezoelectric load (190). The electronic circuit comprises a charge pump (111) configured to supply a charging current to the piezoelectric load dependent on a charge control signal (131), a measurement circuit (113) configured to obtain a load voltage corresponding to a terminal voltage at a load terminal of the piezoelectric load, a comparator circuit (114) configured to compare an adjustable reference voltage with the load voltage. The electronic circuit is configured to determine the charge control signal dependent on the comparison so that the control signal controls delivery of the charging current dependent on the comparison. The electronic circuit is further configured to set the adjustable reference voltage to a target voltage and to set the adjustable reference voltage to a low limit voltage, being lower than the target voltage, after the load voltage has reached the target voltage.
    • 本发明涉及用于控制压电负载(190)的充电的电子电路(100)。 该电子电路包括:电荷泵(111),被配置为根据充电控制信号(131)向压电负载提供充电电流;测量电路(113),被配置为获得与负载处的端电压对应的负载电压 压电负载的端子,比较器电路(114),被配置为将可调参考电压与负载电压进行比较。 电子电路被配置为根据比较来确定充电控制信号,使得控制信号控制取决于比较的充电电流的传送。 电子电路还被配置为在负载电压已经达到目标电压之后将可调参考电压设置为目标电压并且将可调参考电压设置为低于目标电压的低限电压。