摘要:
A solid state light source driver circuit, system and method are provided. The driver circuit includes a rectifier circuit, an energy storage element coupled thereto, a current bleeder circuit coupled thereto, and a switch. The rectifier circuit receives AC input and provides unregulated DC voltage. The switch closes to couple some of the unregulated DC voltage to the energy storage element, and opens to transfer energy to drive the light source. A power factor controller circuit provides an output signal to control the switch. The current bleeder circuit provides supply voltage to the power factor controller circuit within a range and maintains a current flow associated with the AC input that exceeds a predetermined threshold. A constant off-time controller circuit provides a switching frequency control signal to the power factor controller circuit. An EMI filter reduces generated EMI noise.
摘要:
An enhanced UV-emitting fluorescent lamp is described that provides a UV spectral emission for simultaneously tanning of the human skin and promotion of vitamin D production in the human body. The lamp contains a phosphor layer having a phosphor blend of three rare-earth-activated phosphors: SrB4O7:Eu, LaPO4:Ce and YPO4:Ce. Preferably, the phosphor blend comprises 25-27% SrB4O7:Eu, 23-26% LaPO4:Ce, and 47-52% YPO4:Ce by weight.
摘要翻译:描述了一种增强的UV发射荧光灯,其提供用于同时鞣制人皮肤和促进人体中维生素D生产的UV光谱发射。 该灯含有具有三种稀土活化荧光体的荧光体共混物的荧光体层:SrB 4 O 7:Eu,LaPO 4:Ce和YPO 4:Ce。 优选地,荧光体共混物包含25-27%的SrB 4 O 7:Eu,23-26%的LaPO 4:Ce和47-52%的YPO 4:Ce。
摘要:
An electrodeless lamp (10a), wherein the lamp comprises a closed-loop, tubular lamp envelope (13) with parallel cylindrical glass tubes (14a 16a) containing an arc generating and sustaining medium, means (20a) in the form of magnetic toroids for energizing the medium; and a reflector coating (22) associated with the envelope (13) and affixed thereto. In a preferred embodiment of the invention the reflector coating (22) is on the internal surface (24) of the envelope and comprises a layer of a reflective m, such as alumina. Alternatively, the reflective coating (22) can be applied to the external surface of the envelope.
摘要:
Methods for correcting errors in a GFP-T superblock include buffering the 64 bytes of data in an 8×8 byte buffer, buffering the flag byte in a separate buffer, calculating the CRC remainder, and performing single and double bit error correction in three stages. In the first stage, the CRC remainder is compared to a single bit error syndrome table and if an error is located, it is corrected. In the second stage, the CRC remainder is compared to a double bit error syndrome table and if an error is located, it is corrected. The third stage corrects the second error of a double bit error. The flag byte is processed first, followed by the data bytes, eight bytes at a time.
摘要:
A multipacket interface is easily adaptable to any of several link layer interfaces via a simple adaptation layer which can be provided on an ASIC or FPGA. The interface according to the invention includes (in both transmit and receive directions) a multi-bit data signal, a multi-bit channel identifier, a packet abort/error signal, a start-of-frame signal, an end-of-frame signal, a data valid signal, and an interface clock. In the transmit direction, the interface also includes a data request signal and a multi-bit PDU length indicator signal. In the receive direction the interface also includes a server signal failure signal.
摘要:
A method of increasing low temperature lumen maintenance of an electrodeless lamp whose glass body has an interior surface with red emitting Y2O3:Eu (YOE) phosphors and green emitting (Ce,Tb)MgAl11O19 (CAT) phosphors thereon, includes coating aluminum oxide directly on the CAT phosphors and/or the YOE phosphors (preferably at least the CAT phosphors). The interior surface of the glass body may also have blue emitting BaMgAl11O17:Eu (BAM) phosphors thereon. The low temperature lumen maintenance is a ratio of (a) lamp lumens at a first number of lamp operating hours to (b) lamp lumens at a reference number of lamp operating hours, when the lamp is operated with a bulb wall temperature of 35° C. or lower.
摘要翻译:一种提高无电极灯的低温流明维持的方法,该无电极灯的玻璃体具有带有红色发射Y 2 O 3:Eu(YOE)荧光体的内表面和绿色发射( Ce,Tb)MgAl 11 O 9(CAT)荧光体,包括直接在CAT荧光体和/或YOE荧光体(优选至少CAT荧光体)上涂覆氧化铝 )。 玻璃体的内表面也可以在其上具有蓝色发射的BaMaAl 11 O 17(Eu 2+)Eu(BAM)荧光体。 低温流明维持率是灯泡工作时灯泡的灯管壁温度为35°时灯管工作时间(a)和(b)照明灯运行时间的参照灯数的(a) C.或更低。
摘要:
A display device, which can be a plasma display panel or a highly loaded fluorescent lamp, comprises a hollow, translucent glass body containing a medium capable of generating at least several wavelengths of UV radiation. A plurality of phosphors is disposed on the inside surface of the glass body and emits visible radiation upon exposure to the UV radiation. The blue BAM phosphor is most subject to degradation upon long-term exposure to at least one UV wavelength that may be available. The blue BAM along with the red YOE and green CAT phosphors are installed adjacent the inside surface of the glass body to form a first layer; and, the red YOE phosphor is disposed on the first layer to form a second layer, the second layer not being subject to long-term UV degradation. In some embodiments, a layer of alumina may be deposited under the first phosphor layer.
摘要:
An electrodeless lamp (10a), wherein the lamp comprises a closed-loop, tubular lamp envelope (13) with parallel cylindrical glass tubes (14a 16a) containing an arc generating and sustaining medium, means (20a) in the form of magnetic toroids for energizing the medium; and a reflector coating (22) associated with the envelope (13) and affixed thereto. In a preferred embodiment of the invention the reflector coating (22) is on the internal surface (24) of the envelope and comprises a layer of a reflective m, such as alumina. Alternatively, the reflective coating (22) can be applied to the external surface of the envelope.
摘要:
In a method for detecting the fluidity of particles in a vertically extending bed of fluidized particles, an electric charge which is generated on the particles is dissipated through an electrically conductive means in the fluidized bed to give an indication of the fluidity of the particles in the bed.