摘要:
Provided is an apparatus and method for all-optically controlling both a gain and a gain flattening. The apparatus includes: a first amplifier automatically controlling a gain of the apparatus through a feedback loop while amplifying a received optical signal; a fixed gain flattening unit receiving the amplified optical signal from the first amplifier and compensating for the gain according to a wavelength of the received optical signal; and a second amplifier automatically controlling the gain through a feedback loop while amplifying the optical signal input from the fixed gain flattening unit. Accordingly, even if the number of channels of an input WDM optical signal varies, both of a gain and a gain flattening can be all-optically controlled.
摘要:
A backlight assembly of an LCD is provided. The backlight assembly includes a lamp for generating a light, a light guide plate disposed at a side of the lamp, for guiding the light, and a diffusion sheet and a prism sheet disposed on the light guide plate, for enhancing efficiency of the light outputted from the light guide plate, wherein the prism sheet comprises a body part and a plurality of protrusion parts each having a concavely inclined surface formed on the body part.
摘要:
An LCD device has scratch-resistant property without using a protection sheet and can provide enhanced brightness. The LCD device includes a light path regulating member. The member includes a first prism sheet having first prisms of which apex has a round shape. The first prism sheet concentrates light supplied from a lamp to output the concentrated light. An anti-glare polarizing plate uniformly polarizes polarized planes of the concentrated light and provides the polarized light to the lower substrate. The anti-glare polarizing plate is arranged below the lower substrate of an LCD panel, and an uppermost prism sheet of optical sheets is non-matte-treated and has round-treated apexes. In spite of the absence of the protection sheet, the scratch-resistant property of the uppermost prism sheet and the brightness of the LCD panel may be enhanced.
摘要:
A reactor for thin film deposition and a thin film deposition method using the reactor are provided. The reactor includes: a reactor block which receives a wafer transferred through a wafer transfer slit; a wafer block which is installed in the reactor block to receive the wafer thereon; a top plate disposed to cover the reactor block; a shower head which is mounted on the bottom of the top plate and diffuses gas toward the wafer; and an exhaust unit which exhausts the gas from the reactor block. A first supply pipeline which supplies a first reactant gas and/or an inert gas to the wafer; a second supply pipeline which supplies a second reactant gas and/or an inert gas to the wafer; and a plasma generator which generates plasma between the wafer block and shower head are included. The shower head includes: a first supply path connected to the first supply pipeline; a plurality of first diffuse holes formed in the bottom of the shower head at a constant interval; a first main path formed parallel to the plane of the shower head and connecting the plurality of first diffuse holes and the first supply path; a second supply path connected to the second supply pipeline; a plurality of second diffuse holes formed in the bottom of the shower head at a constant interval as the plurality of the first diffuse holes; and a second main path formed parallel to the plane of the shower head at a different height from the second main path and connecting the plurality of second diffuse holes and the second supply path.
摘要:
The present invention relates to novel rumen bacterial mutants resulted from the disruption of a lactate dehydrogenase gene (ldhA) and a pyruvate formate-lyase gene (pfl) (which are involved in the production of lactic acid, formic acid and acetic acid) from rumen bacteria; a novel bacterial mutant (Mannheimia sp. LPK7) having disruptions of a lactate dehydrogenase gene (ldhA), a pyruvate formate-lyase gene (pfl), a phosphotransacetylase gene (pta), and a acetate kinase gene (ackA); a novel bacterial mutant (Mannheimia sp. LPK4) having disruptions of a lactate dehydrogenase gene (ldhA), a pyruvate formate-lyase gene (pfl) and a phosphoenolpyruvate carboxylase gene (ppc) involved in the immobilization of CO2 in a metabolic pathway of producing succinic acid; and a method for producing succinic acid, which is characterized by the culture of the above mutants in anaerobic conditions. The inventive bacterial mutants have the property of producing succinic acid at high concentration while producing little or no organic acids, as compared to the prior wild-type strains of producing various organic acids. Thus, the inventive bacterial mutants are useful as strains for the industrial production of succinic acid.
摘要:
Provided is a shower head used in a reactor for thin film deposition, and a method of fabricating the shower head. The shower head for injecting gases onto a wafer mounted on a wafer block includes: a first supply path supplying a first reaction gas and a second supply path supplying a second reaction gas; a first main path connected to the first supply path and in the plane of the shower head, a plurality of first sub-paths diverging from the first main path in the plane of the shower head, a plurality of first diffuse holes formed regularly spaced on a bottom surface of the shower head, and a plurality of first diffuse paths connecting the plurality of first sub-paths to the plurality of first diffuse holes; a second main path connected to the second supply path in the plane of the shower head and not contacting the first main path, a plurality of second sub-paths diverging from the second main path in the plane of the shower head, a plurality of second diffuse holes formed regularly spaced on a bottom surface of the shower head, and a plurality of second diffuse paths connecting the plurality of second sub-paths and the plurality of second diffuse holes; and a sealing unit sealing open ends of the first and second main paths and open ends of the first and second sub-paths formed in the shower head.
摘要:
A light generating unit includes a plurality of light sources generating lights with different wavelengths. Among the light sources, at least one is disposed on a horizontal surface which differs in height from horizontal surfaces on which the other light sources are disposed. A display device includes the above light generating unit and a display panel for displaying an image by using the lights generated from the light generating unit. A method of improving color uniformity in the display device includes arranging the light sources as in the light generating unit.
摘要:
Disclosed is a diamond tool having a metal plate inserted therein. Between abrasive layers containing diamond particles is inserted a ferrous or non-ferrous metal plate having a wear resistance lower than that of the abrasive layers such that a concave groove is spontaneously formed during a cutting process, thereby reducing the contact load with a workpiece to thereby avoid vibration (wobbling) of a shank, and providing a discharge path for smoothly removing cutting chips and the cooling water. In addition, the content of abrasives and the wear resistance of bonding material are uniformly constituted so that the shrinkage rate does not need to be considered during sintering and the manufacturing process can be simplified, thereby reducing the manufacturing cost and improving the productivity therefor. Furthermore, the area of the metal plate can be controlled, thereby enabling an easy design conforming to the working conditions with a workpiece.
摘要:
A backlight assembly and a liquid crystal display device can discharge heat from the lamp unit to the outside or effectively dissipate the heat. The backlight assembly of the present invention includes a lamp unit, a receiving member for receiving the lamp unit, a first heat dissipation member disposed below the receiving member, and a second heat dissipation for wrapping around a lateral side of the receiving member and the first heat dissipation member. The lamp unit is disposed on an area corresponding to the lateral side of the receiving member. In one embodiment, the first heat dissipation member is a flat plate made of graphite and disposed on an outer side of the bottom of the receiving member. The second heat dissipation member is metal with good thermal conductivity in close contact with the first heat dissipation member and the lateral side of the receiving member where the lamp unit is disposed. Thus, the heat discharged from the lamp unit can be distributed uniformly over the entire area of the receiving member. In addition, the lateral side of the receiving member where the lamp unit is disposed can be replaced with the second heat dissipation member.
摘要:
The invention relates to a method for manufacturing dielectric ceramic powder and a multilayer ceramic capacitor using the ceramic powder. According to the invention, BaCO3 powder is dispersed into a solution of solvent and dispersant to prepare BaCO3 slurry and then the resultant BaCO3 slurry is wet-milled. Also, TiO2 powder slurry is mixed into the wet-milled BaCO3 slurry to form mixed slurry and then the mixed slurry is dried into mixed powder. Finally, the dried mixed powder is calcined to produce BaTiO3 powder.