Abstract:
A back- light unit is disclosed. An object of the present invention is to provide a back- light unit that is able to improve structural stability and mass -production efficiency. The back- light unit includes a circuit substrate comprising a plurality of light sources arranged thereon, an optical sheet positioned on the circuit substrate, a plurality of supporting parts arranged between the circuit substrate and the optical sheet to support the optical sheet, which are installed to the circuit substrate by using surface-mount technology (SMT).
Abstract:
Disclosed are a light emitting unit and a liquid crystal display device using the same. The light emitting unit includes a circuit board including circuit lines and a plurality of connecting members, and a plurality of unit modules connected to the connecting members of the circuit board. The unit module includes at least one light emitting device.
Abstract:
In one embodiment, The light emitting device package includes a package body, a light emitting device mounted on the package body, at least one pair of leads electrically connected with the light emitting device, and a lens located above the light emitting device of the package body and having a recess indented from an upper surface thereof and a curved upper surface defined around the recess to have at least one radius of curvature. The shortest distance from the light emitting device to the lowest portion of the recess is greater than D1/7 and smaller than D1/2.4 wherein D1 is a diameter of the lens.
Abstract:
In one embodiment, the light emitting device package includes a package body, electrodes attached to the package body, and at least two light emitting devices electrically connected to the electrodes. Each light emitting device emits light of a different color from the other light emitting devices. A protective layer is formed over the at least two light emitting devices, and a phosphor layer formed over the protective layer. Other embodiments include other structures such a individual phosphor layers on each light emitting device. And, a light apparatus including a package may include a single driver driving the light emitting devices of the package.
Abstract:
A circuit board for a light emitting device and a light emitting unit using the same, which are capable of achieving an enhancement in light emission efficiency and an enhancement in reliability, are disclosed. The disclosed circuit board includes a substrate having a first surface and a second surface, at least one pair of conductive lines formed on the first surface of the substrate, and electrically connected to a light emitting device package, and a heat transfer member formed in a region where the light emitting device package is coupled to the circuit board, such that the heat transfer member connects the first and second surfaces of the substrate.
Abstract:
A lighting device, a backlight unit, and a printed circuit board thereof are disclosed which can use light emitting elements and can be driven in a sub-divided manner. The backlight unit includes a circuit board mounted with light emitting diodes, and formed with connecting pads electrically connected with the light emitting diodes, a driver installed on one surface of the circuit board, and adapted to drive the light emitting diodes, a connector coupled to the connecting pads of the circuit board, the connector having a connecting direction changed toward the driver, and a connecting line for connecting the connector to the driver.
Abstract:
A track determining method for a cam and a hump track part of a cam-type engine, the cam-type engine on where a roller rolls along a cam track surface (CT) having a plurality of crests and valleys, are provided by using a radius (R1) of a circumscribed circle externally contacting a crest of the cam track surface, a radius (R2) of an inscribed circle internally contacting a valley of the cam track surface, a radius (Ra) of a crest circle internally contacting the circumscribed circle, a radius (Rb) of a valley circle externally contacting the crest circle and the inscribed circle, a radius (R) of the main circle of which is the same as the radius of the main roller rolling along the cam track surface, and a radius (r) of a cell circle tangent to the main circle and having a same center as that of the auxiliary roller.
Abstract:
A valve system for a track type engine comprises a cylinder casing radially disposed with a plurality of cylinders, pistons, a track member disposed through the cylinder casing, and rollers connected to the piston for rolling along the track member, wherein the track member is centrally disposed with an output shaft rotating with the cylinder casing, an outer peripheral surface of the cylinder casing is formed with a plurality of holes penetrating into the cylinders, a head having an inner peripheral surface is disposed at an outer side of the cylinder casing, and a suction port for sucking fuel and/or suction air and an exhaust port are formed at the head, and an inner peripheral surface of the head is formed with a long hole for communicating with the suction port and the exhaust port and for communicating with the hole formed at the outer peripheral surface of the cylinder casing.
Abstract:
The present invention relates to a cam and hump track type engine comprising: a casing radially disposed with a plurality of cylinders about a cam case or a hump track case; pistons reciprocating within the cylinders; a cam or a hump track part mounted on an output shaft disposed at a center of the cam case or the hump track part; a main roller (a first roller) and an auxiliary roller (a second roller) rotatably mounted at the piston for riding and rolling along the cam or the hump track part, wherein the auxiliary roller rides along the track groove of the hump track part to raise or lower the piston, such that an output shaft can smoothly rotate to promote a greater yield in a compact light-weight small engine.