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    • 34. 发明授权
    • Method and device for driving LED element, illumination apparatus, and display apparatus
    • 用于驱动LED元件,照明装置和显示装置的方法和装置
    • US07573446B2
    • 2009-08-11
    • US11043938
    • 2005-01-28
    • Yoshinobu KawaguchiShigetoshi Ito
    • Yoshinobu KawaguchiShigetoshi Ito
    • G09G3/32
    • H05B33/0869H05B33/0803H05B33/0818H05B33/086H05B33/0863
    • A driving method and a driving device are provided for an LED element in which light emitting layers different from each other in light emission wavelength peak, put on each other with a barrier layer being interposed, are sandwiched by a pair of p-type and n-type layers, and color of emitted light from which substantially depends only upon driving current value. The method comprises a driving current value calculation step of obtaining a value for designating a current value corresponding to a desired color of emitted light from the LED element; a driving current generation step of generating a driving current having the current value designated by the value obtained in the driving current value calculation step; and a driving current supply step of supplying the LED element with the driving current generated in the driving current generation step.
    • 提供了一种用于LED元件的驱动方法和驱动装置,其中插入有阻挡层的发光波长峰值彼此不同的发光层被夹在一起,由一对p型和n型 型层,以及基本上仅取决于驱动电流值的发射光的颜色。 该方法包括驱动电流值计算步骤,用于获得用于指定与来自LED元件的发射光的期望颜色相对应的电流值的值; 驱动电流产生步骤,产生具有由所述驱动电流值计算步骤中获得的值指定的电流值的驱动电流; 以及向所述LED元件供给在所述驱动电流产生步骤中产生的驱动电流的驱动电流供给步骤。
    • 35. 发明申请
    • Nitride semiconductor laser device
    • 氮化物半导体激光器件
    • US20090116528A1
    • 2009-05-07
    • US12285337
    • 2008-10-02
    • Yoshinobu KawaguchiTakeshi KamikawaShigetoshi Ito
    • Yoshinobu KawaguchiTakeshi KamikawaShigetoshi Ito
    • H01S5/04
    • H01S5/32341H01S5/028H01S5/0287H01S5/2214H01S5/3202
    • A nitride semiconductor laser device has a multilayer structure formed by stacking a plurality of nitride semiconductor layers made of hexagonal nitride semiconductors, while the multilayer structure is provided with a waveguide structure for guiding a laser beam, the nitride semiconductor layers forming the multilayer structure are stacked in a direction substantially perpendicular to the c-axes of the hexagonal nitride semiconductors constituting the nitride semiconductor layers, a first cavity facet forming a side surface of the waveguide structure is a c-plane having Ga-polarity, a second cavity facet forming another side surface of the waveguide structure opposed to the first cavity facet is a c-plane having N-polarity, a crystalline nitrogen-containing film is formed on the surface of the first cavity facet, and the reflectance of the first cavity facet is smaller than the reflectance of the second cavity facet.
    • 氮化物半导体激光器件具有通过堆叠由六方氮化物半导体制成的多个氮化物半导体层而形成的多层结构,而多层结构设置有用于引导激光束的波导结构,形成多层结构的氮化物半导体层被堆叠 在与构成氮化物半导体层的六方氮化物半导体的c轴大致垂直的方向上,形成波导结构的侧面的第一空腔面是具有Ga极性的c面,形成另一侧的第二腔面 与第一腔面相对的波导结构的表面是具有N极性的c面,在第一腔面的表面上形成结晶含氮膜,第一腔面的反射率小于 第二腔面的反射率。