Abstract:
Provided is a traffic control method of IPTV broadcast service that allows a broadcast server to transmit data in a maximum bandwidth. The broadcast server sets a maximum buffer amount. The broadcast server monitors a network state to transmit data in a maximum bandwidth allowed by a network. The broadcast server judges whether a buffer amount of transmitted data reaches a maximum buffer amount. When the buffer amount of transmitted data reaches the maximum buffer amount, the broadcast server controls a bandwidth depending on a reproduction speed of a set-top box (STB) to transmit data. When the buffer amount of transmitted data does not reach the maximum buffer amount, the broadcast server transmits data in a maximum bandwidth allowed by the network.
Abstract:
An organic light-emitting device including a transparent conducting oxide layer as a cathode and a method of manufacturing the organic light-emitting device. The organic light-emitting device includes an anode disposed on a substrate. An organic functional layer including at least an organic light-emitting layer is disposed on the anode. The transparent conducting oxide layer used as the cathode is disposed on the organic functional layer. The transparent conducting oxide layer cathode is formed by plasma-assisted thermal evaporation. A microcavity structure is not formed in the organic light-emitting device, thereby avoiding a luminance change and a color shift as a function of viewing angle.
Abstract:
Systems and methods for providing an adaptive bias circuit that may include a differential amplifier, low-pass filter, and common source amplifier or common emitter amplifier. The adaptive bias circuit may generate an adaptive bias output signal depending on input signal power level. As the input power level goes up, the adaptive bias circuit may increase the bias voltage or bias current of the adaptive bias output signal. A power amplifier (e.g., a differential amplifier) may be biased according to the adaptive bias output signal in order to reduce current consumption at low power operation levels.
Abstract:
Embodiments of the invention may provide for a CMOS antenna switch, which may be referred to as a CMOS SPDT switch. The CMOS antenna switch may operate at a plurality of frequencies, perhaps around 900 MHz, 1.9 GHz and 2.1 GHz according to an embodiment of the invention. The CMOS antenna switch may include both a receiver switch and a transmit switch. The receiver switch may utilize a multi-stack transistor with body substrate switching and attachment of external capacitor between drain and gate to block high power signals from the transmit path as well as to maintain low insertion loss at the receiver path. Exemplary embodiments of the CMOS antenna switch may provide for 38 dBm P 0.1 dB at multi bands (e.g., 900 MHz, 1.8 GHz, and 2.1 GHz). In addition, −60 dBc second and third harmonic performance up to 30 dBm input, may be obtained according to example embodiments of the invention.
Abstract translation:本发明的实施例可以提供可被称为CMOS SPDT开关的CMOS天线开关。 根据本发明的实施例,CMOS天线开关可以以多个频率操作,可能约为900MHz,1.9GHz和2.1GHz。 CMOS天线开关可以包括接收器开关和发送开关。 接收器开关可以利用具有主体衬底切换的多层晶体管,并且在漏极和栅极之间附接外部电容器以阻挡来自发射路径的高功率信号以及在接收器路径处保持较低的插入损耗。 CMOS天线开关的示例性实施例可以在多频带(例如,900MHz,1.8GHz和2.1GHz)处提供38dBm P 0.1dB。 此外,根据本发明的示例性实施例,可以获得高达30dBm输入的-60dBc的二次和三次谐波性能。
Abstract:
A method for manufacturing a thin film type solar cell is disclosed, which is capable of reducing degradation of solar cell by decreasing the number of dangling bonding sites or SiH2 bonding sites existing in amorphous silicon owing to an optimal content ratio of ingredient gases, an optimal chamber pressure, or an optimal substrate temperature during a process for depositing an I-type semiconductor layer of amorphous silicon by a plasma CVD method, the method comprising forming a front electrode layer on a substrate; sequentially depositing P-type, I-type, and N-type semiconductor layers on the front electrode layer; and forming a rear electrode layer on the N-type semiconductor layer, wherein the process for forming the I-type semiconductor layer comprises forming an amorphous silicon layer by the plasma CVD method under such circumstances that at least one of the aforementioned conditions is satisfied, for example, a content ratio of silicon-containing gas to hydrogen-containing gas is within a range between 1:7 and 1:10; a chamber pressure is maintained at a range between 2.0 Torr and 2.4 Torr; and a substrate temperature is maintained at a range between 225° C. and 250° C.
Abstract:
A liquid crystal display device includes a liquid crystal display panel, a plurality of lamps for irradiating light onto the liquid crystal display panel, a cover bottom that houses the plurality of lamps, an inverter printed circuit board having a first surface and a second surface opposite to the first surface with an insulation base layer between the first and second surfaces, wherein the second surface is adjacent to the cover bottom, a transformer on the first surface of the inverter printed circuit board, and a metal shielding pattern on the second surface of the inverter printed circuit board directly between the transformer and the cover bottom.
Abstract:
The present invention relates to an acyclic nucleoside phosphonate derivative represented by the following formula (1): in which represents single bond or double bond, R1, R2, R3, R7 and R8 are defined herein, Y represents —O—, —S—, —CH(Z)-, ═C(Z)-, —N(Z)-, ═N—, or —SiH(Z)-, wherein Z represents hydrogen, hydroxy or halogen, or represents C1-C7-alkyl, C1-C5-alkoxy, allyl, hydroxy-C1-C7-alkyl, C1-C7-aminoalkyl or phenyl, Q represents a group having the following formula: wherein X1, and X2 independently of one another represent hydrogen, amino, hydroxy or halogen, or represent C1-C7-alkyl, C1-C5-alkoxy, allyl, hydroxy-C1-C7-alkyl, phenyl or phenoxy each of which is optionally substituted by nitro or C1-C5-alkoxy, or represent C6-C10-arylthio which is optionally substituted by nitro, amino, C1-C6-alkyl or C1-C4-alkoxy, or represent C6-C12-arylamino, C1-C7-alkylamino, di(C1-C7-alkyl)amino, C3-C6-cycloalkylamino or a structure of wherein n denotes an integer of 1 or 2 and Y1 represents O, CH2 or N—R (R represents C1-C7-alkyl or C6-C12-aryl), which is useful as an antiviral agent (particularly, against hepatitis B virus), pharmaceutically acceptable salts, stereoisomers, and a process for the preparation thereof.
Abstract:
A gallium nitride thin film on sapphire substrate having reduced bending deformation and a method for manufacturing the same. An etching trench structure is formed on a sapphire substrate by primary nitradation and HCl treatment and a gallium nitride film is grown thereon by secondary nitradation. The gallium nitride thin film on sapphire substrate comprises an etching trench structure formed on a sapphire substrate, wherein a function graph of a curvature radius Y according to a thickness X of a gallium nitride film satisfies Equation 1 below, and corresponds to or is located above a function graph drawn when Y0 is 6.23±1.15, A is 70.04 ±1.92, and T is 1.59±0.12: Y=Y0+A·e−(X−1)/T, [Equation 1] where Y is the curvature radius m, X is the thickness of the gallium nitride film, and Y0, A, and T are positive numbers.
Abstract:
A difluoropyridine-based compound includes at least one difluoropyridine group in its molecule. The difluoropyridine-based compound may be used as an electron injection material, an electron transport material, or a hole blocking material in full-color fluorescent or phosphorescent devices. The difluoropyridine-based compound has good electrical characteristics and a high charge transport capability. The difluoropyridine-based compound may be used to produce an organic electroluminescent device with high efficiency, low voltage, improved brightness, and a long life expectancy.