Abstract:
A back-light unit including a plurality of substrates, a plurality of light sources respectively disposed on the plurality of substrates and configured to emit light, and N (N > 2) light guide panels respectively disposed adjacent to the plurality of light sources, a corresponding light guide panel including a light incidence part having a light incidence surface for receiving light emitted from a corresponding light source, and a light emission part for emitting the received incident light. Further, the corresponding light guide panel includes protruding surface patterns protruding from an upper surface the light emission part.
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:
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:
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:
Provided are a light emitting unit and a direct light type backlight apparatus employing the light emitting unit. The light emitting unit includes: a base; a light emitting diode that is mounted on the base and emits light; a cup member formed around the light emitting diode on the base to a predetermined height; and a lens installed on the base and including an incident portion that is disposed toward the light emitting diode and onto which light is transmitted, a first refraction portion that is formed flat in the center of a surface of the lens opposite the incident portion and refracts and transmits incident light, and a second refraction portion that is formed from the first refraction portion to have a predetermined curvature and refracts and transmits incident light, wherein the light emitting unit emits light uniformly over a wide range of angles by allowing light emitted by the light emitting diode to be transmitted through the lens. The direct light type backlight apparatus includes: a reflection panel reflecting incident light; a light source including a plurality of the light emitting units emitting light; a diffusion plate that is disposed on the light source and diffuses the light irradiated from the light emitting unit; and a prism sheet converting the path of the light diffused by the diffusion plate by refracting and transmitting the light.
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 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:
A power saving system in distributed wireless personal area network and a method thereof are disclosed. A PS (Power Save) anchor that provides information about hibernating devices to a beacon group through power save information elements in media access control for a wireless personal area network based on a wireless mobile ad-hoc network. Accordingly, all devices in the given wireless personal area network can schedule their active modes and hibernating modes according to hibernating intervals of destination devices with which the devices want to communicate. This can effectively reduce the necessity of the devices ' waiting for the destination devices to awake from the hibernating mode as the devices maintain their idle state, and thus the power consumption of all the devices in the network can effectively be reduced.
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.