Abstract: A cooling system provided for a bond head heater including a heater plate which is operative to heat a die that is being held adjacent to the bond head heater has at least one fluid chamber thermally coupled to the heater plate. The fluid chamber includes an enclosure for containing a fluid, and a fluid inlet and a fluid outlet coupled to the fluid chamber. Fluid is introduced into the fluid chamber through the fluid inlet and is exhausted from the fluid chamber through the fluid outlet. The fluid is configured to flow through a heat transmission path lying substantially next to the heater plate when the fluid is travelling between the fluid inlet and the fluid outlet.

Abstract: A portable solar cell charger and methods of charging electronic devices using the same are disclosed. A portable solar cell charger comprises at least one solar cell plate holding a plurality of solar cells; a film with reformed surface formed on the solar cell plate; a power control part supplying a load side with power after perceiving a voltage required from the load side; and a case holding the solar cell plate and the power control part. A method of charging an electronic device using a solar cell charger comprises perceiving a voltage required from a load side using a microprocessor; converting the perceived voltage using D/A converter; comparing the converted voltage with a voltage from a solar cell plate; integrating signals from a comparator and a pulse generator; adjusting the voltage from the solar cell plate; and supplying the voltage from the solar cell plate into the load side.

Abstract: An optical sheet and a backlight unit using the same are disclosed, in which deviation of a viewing angle is minimized to improve picture quality. The optical sheet includes a diffusion sheet provided with a plurality of diffusion patterns diffusing incident light in at least two directions to allow the incident light to have different strengths.

Abstract: A system for forming a periodic pulse pattern in a sample includes a movable stage having the sample loaded thereon, a pulse laser for generating a laser beam of pulses, an objective lens for focusing the laser beam to the sample to form a pattern of pulses in the sample, and a controller for adjusting the movement speed of the movable stage to set a period of the pulse pattern. The pulse pattern includes a spot pattern or a line pattern made by a slit provided between the pulse laser and the objective lens.

Abstract: A backlight unit includes a first lamp to emit light, a light-guiding plate to generate a surface light source with the light emitted from the first lamp, a light-diffusion sheet provided on the light-guiding plate to diffuse the light passing through the light-guiding plate, a prism sheet including a plurality of prism peaks arranged in a first direction, for condensing the light passing through the light-diffusion sheet, and a lenticular lens sheet including a plurality of lenticular lenses arranged in a second direction perpendicular to the first direction, for re-condensing the light passing through the prism sheet.

Abstract: A prism sheet capable of achieving an enhancement in light efficiency and viewing angle characteristics and a backlight unit using the prism sheet are disclosed. The prism sheet includes: a condensing film which transmits light incident to the condensing film; a plurality of prism crests on the condensing film having apexes; and a plurality of reflection patterns formed on the condensing film such that each of the reflection patterns faces a boundary of adjacent prism crests associated with the reflection pattern to reflect light incident onto the reflection patterns.

Abstract: A prism sheet capable of enhancing light efficiency and viewing angle characteristics, a backlight unit using the prism sheet, and a method for fabricating the prism sheet are disclosed. The prism sheet includes a transparent substrate, a plurality of grooves formed in an upper surface of the transparent substrate to extend in a parallel direction with each other and to be uniformly spaced apart from one another by a predetermined distance, a plurality of reflection patterns respectively formed in the grooves, and a plurality of lenticular lenses formed on the upper surface of the transparent substrate formed with the reflection patterns.

Abstract: A prism sheet, a back light unit using the same and liquid crystal display device having the back light unit are disclosed, for improvement of light concentration, frontal luminance and viewing angle, in which the prism sheet includes a light-condensing film. The light condensing film has a plurality of prism peaks, each having a triangular cross section inclined surface which is inclined from a top surface of the light-condensing film at an angle of about 20° to about 40°.

Abstract: A back light unit is disclosed, which improves condensing efficiency of light and viewing angle characteristics. The back light unit includes at least one lamp generating light, a light guide plate emitting light across a surface thereof using the light generated from the lamp, a diffusion sheet arranged above the light guide plate to diffuse the light passing through the light guide plate, a first condensing sheet condensing the light from the diffusion sheet using a plurality of first elliptical condensing patterns arranged on the diffusion sheet in a first direction, and a second condensing sheet further condensing the light from the first condensing sheet using a plurality of second elliptical condensing patterns arranged on the first condensing sheet in a second direction crossing the first direction.

Abstract: Provided is a flexible transmission shaft. The flexible transmission shaft for transmitting a torque from a drive source to a driven load, the flexible transmission shaft includes a pipe-shaped shaft, which has one or more slits extending in a circumferential direction of the shaft, each of the slits having two opposed surfaces that are isolated from each other by the slit, a plurality of protrusions protruding from one of the opposed surfaces, and a plurality of recessions formed in the other one of the opposed surfaces to receive and support the protrusions therein. Since the flexible transmission shaft can be bent or curved within a given angle, it can be substituted for a flexible coupling, a universal joint, or a bevel gear. In addition, the flexible transmission shaft does not require additional mechanical elements to be connected to a shaft, and has a simple structure, light weight, and high torque transmission capability.

Abstract: A back light unit for a liquid crystal display device for improving uniformity of the light and dispensing with optical sheets. The back light unit includes a light source having a holographic pattern formed on a surface thereof opposite the display device which is to display a picture, and a reflective plate under the light source.

Abstract: An in-plane switching mode liquid crystal display device, comprising first and second substrates attached to face each other; a liquid crystal layer between the first and second substrates; a first polarization film and a second polarization film on the first substrate and the second substrate, respectively, each of the first and second polarization films simultaneously performing an A-plate compensation film function and a polarization function, the first and second polarization films prevent light leakage in a horizontal direction; and a C-plate compensation film positioned on the second substrate, the C-plate compensation film prevents light leakage in a vertical direction.

Abstract: A natural vaporization humidifier using latent heat of water evaporation is provided.

Abstract: A controller for controlling a timer for measuring offense limit time in a basketball game is provided, in which offense limit time is continuously displayed on an offense limit time display when game remaining time is left less than twenty-four seconds, to thereby allow players to play the basketball game and spectators to see the basketball game more dynamically as well.

Abstract: Disclosed is a compensation film, a manufacturing method thereof and a liquid crystal display, which can obtain a wider viewing angle. The liquid crystal display can secure a wider viewing angle by providing the compensation film formed of multi-layered cholesteric liquid crystal layers.

Abstract: The present invention relates to an optical efficiency enhancing film and an LCD using the same. The LCD of the present invention is provided with an optical efficiency enhancing film that includes uniaxial films made of a refractive index anisotropic material and isotropic films, wherein the uniaxial films and the isotropic films are alternatively laminated. Then, optical efficiency as well as polarization may be enhanced to thereby improve the brightness of the LCD.

Abstract: A liquid crystal display using a compensating film includes a liquid crystal panel having upper and lower substrates, and a liquid crystal layer interposed between; a first compensating film formed over an inner surface of at least one of the upper substrate lower substrates; a second compensating film formed over an outer surface of at least one of the upper and lower substrates; and first and second polarizing plates attached over the second compensating film and on an outer surface of the other one of the upper lower substrates such that a first optical transmission axis of the first polarizing plate is perpendicular to a second optical transmission axis of the second polarizing plate. The compensating film is formed inside the liquid crystal panel, thereby preventing light leakage at a viewing angle and improving the viewing angle characteristics.

Abstract: The present invention relates to an optical transmitter for generating a duobinary Carrier Suppressed Return-to-Zero (CSRZ) optical signal and a CSRZ-Differential Phase Shift Keying (DPSK) optical signal for use in an optical communication system. The optical transmitter includes a data encoder, an electric mixer and a single Mach-Zehnder interferometer type external, and is capable of reducing the optical spectrum bandwidth of the optical signal using electrical band limiting and reducing the optical signal distortion caused by Group Velocity Dispersion (GVD) in an optical fiber.