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    • 61. 发明授权
    • Lamp driver circuit
    • 灯驱动电路
    • US4987347A
    • 1991-01-22
    • US320726
    • 1989-03-08
    • Robert A. LeskovecJohn M. DavenportJoseph M. Allison
    • Robert A. LeskovecJohn M. DavenportJoseph M. Allison
    • H05B39/04H05B41/292
    • H05B41/2928H05B39/045Y10S315/02Y10S315/07
    • A lamp driver circuit is presented herein for driving a lamp circuit with an AC squarewave voltage at a relatively high frequency. The driver circuit includes a self-oscillating half-bridge circuit having a pair of input terminals connected across a DC voltage supply, which may be obtained from rectifying an AC voltage signal, and a pair of output terminals connected across a lamp circuit including a lamp, either a resistive lamp or a gaseous discharge lamp, to be energized. The circuit also includes a pair of capacitors connected together in series across the input terminals and having a junction therebetween connected to a first one of the output terminals. The bridge circuit also includes first and second switching transistors connected together in series across the input terminals. A transformer is provided having first and second windings thereon respectively connected to the first and second switching transistors for alternately applying forward biasing base drive current to the first and second transistors. A third winding on the transformer is connected in series from the junction of the two transistors to a second one of the output terminals for purposes of supplying a squarewave voltage across the output terminals for driving the lamp circuit. A starter circuit serves to start the half-bridge circuit by initially turning on one of the switching transistors in such a manner that while one transistor is being forward biased into conduction, the other transistor is reverse biased.
    • 本文提出了一种灯驱动器电路,用于以较高频率驱动具有交流方波电压的灯电路。 驱动器电路包括自振荡半桥电路,其具有连接在直流电压源上的一对输入端子,该一对输入端子可以从整流交流电压信号获得;以及一对输出端子,其连接在包括灯 ,电阻灯或气体放电灯,被激励。 该电路还包括串联连接在输入端上的一对电容器,并且具有连接到第一输出端子的连接点。 桥接电路还包括串联连接在输入端子上的第一和第二开关晶体管。 提供一种变压器,其具有分别连接到第一和第二开关晶体管的第一和第二绕组,用于交替地向第一和第二晶体管施加正向偏置基极驱动电流。 变压器上的第三绕组从两个晶体管的结点串联连接到输出端的第二绕组,用于在输出端上提供方波电压以驱动灯电路。 起动器电路用于通过首先以一个晶体管正向偏置为导通的方式首先接通其中一个开关晶体管来启动半桥电路,另一个晶体管被反向偏置。
    • 66. 发明授权
    • Luminaire with improved lateral illuminance control
    • 灯具具有改进的横向照度控制
    • US07374313B2
    • 2008-05-20
    • US11366711
    • 2006-03-02
    • William J. CassarlyThomas L. R. DavenportJohn M. DavenportChris H. Jenson
    • William J. CassarlyThomas L. R. DavenportJohn M. DavenportChris H. Jenson
    • F21V8/00F25D27/00
    • G02B6/001
    • A luminaire with improved lateral illuminance control comprising a light pipe with a longitudinal center is disclosed. A light-extraction means applied to a radial swath of the light pipe has a longitudinal portion having dimension along its length, centered about a slice on the light pipe longitudinally; said slice being orthogonal to the longitudinal center and located in a propagation plane through which light propagates to a virtual target area intersecting the propagation plane. The light pipe intervenes between the radial swath and the target area. A first average efficiency point of the light-extraction means corresponds to the minimum distance to the target area being at least approximately 20% less than a respective, second average efficiency point corresponding to a respective maximum distance to such area. The light-extraction means efficiency varies from the first average efficiency point to the second average efficiency point though more than one non-zero value.
    • 公开了一种具有改进的侧向照度控制的照明器,其包括具有纵向中心的光管。 施加到光管的径向条带的光提取装置具有沿其长度的纵向部分的纵向部分,纵向地围绕光管的切片; 所述切片正交于纵向中心并且位于传播平面中,光线通过该传播平面传播到与传播平面相交的虚拟目标区域。 光管介于径向条和目标区之间。 光提取装置的第一平均效率点对应于到目标区域的最小距离比对应于相应于该区域的最大距离的相应的第二平均效率点小至少大约20%。 光提取装置虽然多于一个非零值,但效率从第一平均效率点到第二平均效率点变化。
    • 67. 发明授权
    • Efficient directional lighting system
    • 高效的定向照明系统
    • US06554456B1
    • 2003-04-29
    • US09565257
    • 2000-05-05
    • Roger F. Buelow, IIJohn M. DavenportJuris Sulcs
    • Roger F. Buelow, IIJohn M. DavenportJuris Sulcs
    • F21V700
    • F21V13/04F21V5/04F21V7/0025F21V14/00F21V14/04F21V2200/17
    • An efficient system for directing light comprises a light source and a generally tubular, hollow coupling device. The coupling device has an interior light-reflective surface for receiving light from the source at an inlet and transmitting it as a generally diverging light beam through an outlet. The device is shaped in accordance with non-imaging optics and increases in cross sectional area from inlet to outlet so as to reduce the angle of light reflected from the surface as it passes through the device. The foregoing system provides a discharge-based directional light source that can be of the size of a directional halogen source (e.g., an MR16 or MR 11 lamp) while substantially preserving the discharge efficiency, light-output capacity and lifetime of discharge-based sources. This results from the coupling device that provides light with good spatial uniformity in light intensity and color. Embodiments of the invention can simply split the light to multiple (e.g., two) destinations with substantially the same efficiency.
    • 用于引导光的有效系统包括光源和大体上管状的中空耦合装置。 耦合装置具有内部光反射表面,用于在入口处接收来自源的光,并将其作为大体上发散的光束通过出口传输。 该装置根据非成像光学元件成形,并且从入口到出口的横截面面积增加,以便在穿过该装置时减小从表面反射的光的角度。 上述系统提供了可以具有定向卤素源(例如MR16或MR11灯)尺寸的基于放电的定向光源,同时基本上保持了放电效率,光输出能力和基于放电源的寿命 。 这是由提供光在光强度和颜色上具有良好的空间均匀性的耦合装置产生的。 本发明的实施例可以以基本上相同的效率简单地将光分离成多个(例如,两个)目的地。
    • 69. 发明授权
    • Multi-stranded fiberoptic light delivery system with smooth color transitioning
    • 多光纤光输送系统,色彩转换平滑
    • US06453099B1
    • 2002-09-17
    • US09776208
    • 2001-02-02
    • John M. DavenportRoger F. Buelow, II
    • John M. DavenportRoger F. Buelow, II
    • G02B604
    • G02B6/4298
    • An exemplary embodiment of the invention provides a multi-stranded fiberoptic light delivery system for delivering light to a plurality of fixtures. Each of the fixtures receives light from one or more active strands of a fiberoptic cable. A light source provides a light beam for transmission through the cable. A light-coloring device receives the light beam and sequentially imparts to the light beam different colors. A rod is interposed in the light beam between the color wheel and the fixtures. The rod has an inlet for receiving the light beam and an outlet for transmitting light to the cable. The rod has a length at least high enough to cause it to pass to all active strands a portion of the light of a color just starting to be received at its inlet.
    • 本发明的示例性实施例提供了一种用于将光传送到多个固定装置的多股光纤光输送系统。 每个灯具都接收来自光纤电缆的一个或多个有源线的光。 光源提供光束以通过电缆传输。 光着色装置接收光束并顺序地赋予不同颜色的光束。 杆位于色轮和固定装置之间的光束中。 杆具有用于接收光束的入口和用于将光传送到电缆的出口。 杆具有至少足够高的长度以使其能够传递到所有活性链,其一部分刚刚开始在其入口处被接收的颜色的光的一部分。
    • 70. 发明授权
    • Low angle, dual port light coupling arrangement
    • 低角度,双端口光耦合布置
    • US5927849A
    • 1999-07-27
    • US38083
    • 1998-03-11
    • William J. CassarlyJohn M. DavenportRichard L. Hansler
    • William J. CassarlyJohn M. DavenportRichard L. Hansler
    • G02B6/32G02B6/293G02B6/42H01L31/12F21V8/00F21V13/04
    • G02B6/4298
    • A compact coupling arrangement between a light source and a plurality of light distribution harnesses includes a plurality of reflector members arranged around the light source with respective focal points of the reflector members positioned substantially coincident with the light source, so as to receive light from the source and reflect the light away from the source. Further included is a plurality of light coupling members, each having an inlet and an outlet surface for receiving light originating from the light source and transmitting light, respectively. A plurality of light distribution harnesses is provided for respectively receiving light from the light coupling members. The light coupling members each comprise a lens having a negative curvature in at least one direction generally transverse to a main light transmission axis therethrough, for receiving light at a first angular distribution and transmitting light at a reduced angular distribution. To facilitate manufacturing, at least one of the light coupling members may comprise an integral portion of one of the reflector members coinciding with the curvature of a proximate reflector member. Further, at least one of the inlet and outlet surfaces of one of the coupling members may be non-axisymmetrical about the main light transmission axis of its associated coupling member, for improving efficiency of light coupling.
    • 在光源和多个配光束之间的紧凑耦合布置包括围绕光源布置的多个反射器构件,其中反射器构件的各个焦点基本上与光源重合,以便从光源接收光 并将光线从源头反射出来。 还包括多个光耦合构件,每个光耦合构件具有分别用于接收源自光源的光和透射光的入口和出口表面。 提供多个配光束,用于分别接收来自光耦合构件的光。 光耦合构件各自包括在至少一个方向上的至少一个方向具有负曲率的透镜,所述至少一个方向大致横贯于穿过其的主光透射轴,用于以第一角度分布接收光并以较小的角度分布透射光。 为了便于制造,至少一个光耦合构件可以包括一个反射器构件的一体部分,与邻近的反射器构件的曲率重合。 此外,一个联接构件的入口和出口表面中的至少一个可以围绕其相关联的联接构件的主光透射轴线非轴对称,以提高光耦合的效率。