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    • 51. 发明授权
    • Optical signal detection circuit and optical receiver
    • 光信号检测电路和光接收机
    • US09160458B2
    • 2015-10-13
    • US13981313
    • 2012-01-25
    • Hiroshi KoizumiMasafumi NogawaYusuke Ohtomo
    • Hiroshi KoizumiMasafumi NogawaYusuke Ohtomo
    • H04B10/06H04B10/60H04B10/69
    • H04B10/60H04B10/69H04B10/697
    • An optical signal detection circuit (10) includes an amplification circuit (11) that differentially amplifies an electrical signal (Tout) corresponding to the pulse train of an optical signal (Pin) and outputs a differential output signal (Aout), and a comparator (12) that compares the voltage value of the positive-phase signal of the differential output signal (Aout) with the voltage value of the negative-phase signal and outputs a pulsed comparison output signal (Cout) corresponding to the comparison result. The amplification circuit (11) includes a current addition circuit (11E) that adjusts a DC load current to generate a positive-phase signal (Aout+) and a negative-phase signal (Aout−) of the differential output signal (Aout) in accordance with an adjusted voltage value from an external adjusted voltage source (Vadj) and adjusts the DC bias of the positive-phase signal (Aout+) and the DC bias of the negative-phase signal (Aout−).
    • 光信号检测电路(10)包括对与光信号(Pin)的脉冲序列相对应的电信号(Tout)进行差分放大并输出差分输出信号(Aout)的放大电路(11)和比较器 12),其将差分输出信号(Aout)的正相信号的电压值与负相位信号的电压值进行比较,并输出与比较结果对应的脉冲比较输出信号(Cout)。 放大电路(11)包括电流相加电路(11E),该电流相加电路(11E)调节直流负载电流,以产生差分输出信号(Aout)的正相信号(Aout +)和负相位信号(Aout-) 具有来自外部调整电压源(Vadj)的调整电压值,并调节正相信号(Aout +)的直流偏置和负相位信号(Aout-)的直流偏置。
    • 56. 发明授权
    • Optical apparatus and imaging apparatus
    • 光学装置和成像装置
    • US08451525B2
    • 2013-05-28
    • US12805182
    • 2010-07-16
    • Keita KaifuKazuhiro TanakaHiroshi Koizumi
    • Keita KaifuKazuhiro TanakaHiroshi Koizumi
    • G02B26/02
    • G02B13/0015G02B13/0075G02B26/004
    • An optical apparatus includes: a sealing case having chambers partitioned by a partition wall; a polar liquid having polarity and a nonpolar liquid having no polarity which are respectively sealed in a predetermined amount in each of the chambers; and electrodes pulling the polar liquid by an electrowetting phenomenon upon application of a driving voltage. One of the polar liquid and the nonpolar liquid is colored with a color having a light-blocking property, and the other has a light-transmitting property, at least a part of the partition wall is positioned in an optically effective area including the optical axis, and when a driving voltage is applied to a predetermined electrode among the electrodes, the polar liquid is moved in the chamber between closed and open positions where the optically effective area is closed and open, respectively.
    • 光学装置包括:密封箱,其具有由分隔壁分隔的室; 具有极性的极性液体和没有极性的非极性液体在每个室中分别以预定量密封; 以及在施加驱动电压时通过电润湿现象拉动极性液体的电极。 极性液体和非极性液体中的一种被着色为具有阻光性的颜色,另一种具有透光性,分隔壁的至少一部分位于包括光轴的光学有效区域中 并且当驱动电压施加到电极中的预定电极时,极性液体分别在光学有效区域闭合和打开的闭合位置和打开位置之间在腔室中移动。
    • 57. 发明授权
    • Droplet jetting head
    • 滴液喷头
    • US08038261B2
    • 2011-10-18
    • US12235941
    • 2008-09-23
    • Hiroshi Koizumi
    • Hiroshi Koizumi
    • B41J2/14B41J2/16
    • B41J2/145B41J2/14274
    • A droplet jetting head includes a nozzle plate having multiple nozzles arranged in a single line and multiple liquid passages respectively communicating with the multiple nozzles and extending in the same direction, a liquid chamber plate having multiple liquid chambers provided in the multiple liquid passages and configured to respectively communicate with the multiple liquid passages, and multiple piezoelectric elements provided so that an end of each of the piezoelectric elements can face a corresponding one of the multiple liquid chambers. Here, the distance between each of the nozzles and the corresponding liquid chamber communicating with the nozzle is changed in a cycle.
    • 一种液滴喷射头包括:喷嘴板,其具有排列成单列的多个喷嘴和分别与多个喷嘴连通并且沿相同方向延伸的多个液体通道;具有设置在多个液体通道中的多个液体室的液体室板, 分别与多个液体通道连通,并且多个压电元件被设置成使得每个压电元件的端部可以面对多个液体室中的对应的一个。 这里,每个喷嘴与与喷嘴连通的相应的液体室之间的距离以一个周期改变。
    • 60. 发明授权
    • Droplet jet head and droplet jet applicator
    • 液滴喷头和液滴喷射器
    • US07845771B2
    • 2010-12-07
    • US11770275
    • 2007-06-28
    • Hiroshi Koizumi
    • Hiroshi Koizumi
    • B41J2/045
    • B41J2/14274B41J2002/14362
    • A droplet jet head includes: a base member holding a plurality of piezoelectric elements; a vibration plate provided on the base member and vibrated by each of the plurality of piezoelectric elements; a liquid chamber plate provided on the vibration plate and forming wall surfaces of a plurality of liquid chambers containing liquid; a nozzle plate provided on the liquid chamber plate and having a plurality of nozzles communicating with the plurality of liquid chambers, respectively; a holder plate provided on the liquid chamber plate in a manner of covering the nozzle plate and having an opening which exposes each of the plurality of nozzles; a buffer member provided between the holder plate and the nozzle plate; and a plurality of screws fastening the base member, the vibration plate, the liquid chamber plate and the holder plate.
    • 液滴喷射头包括:保持多个压电元件的基体; 振动板,设置在所述基座构件上,并且由所述多个压电元件中的每一个振动; 设置在振动板上并形成容纳液体的多个液体室的壁面的液体室板; 喷嘴板,设置在所述液体室板上,并且分别具有与所述多个液体室连通的多个喷嘴; 保持板,其以覆盖所述喷嘴板的方式设置在所述液体室板上,并具有使所述多个喷嘴中的每一个露出的开口; 设置在保持板和喷嘴板之间的缓冲部件; 以及固定基部构件,振动板,液体室板和保持板的多个螺钉。