Abstract: A lighting apparatus includes a light reflector, a light emitting diode (LED) and a light-changing film. The light reflector has a concave surface. The LED is disposed under the concave surface of the light reflector to provide the concave surface with light. The light-changing film converts a first light generated by the LED into a second light. For example, the light-changing film may be a fluorescent film receiving the first light and emitting the second light with increased wavelength. The LED and the light-changing film are spaced apart from each other to minimize discoloration of the light-changing film.

Abstract: Disclosed is a method for forming a thermal interface material for a semiconductor chip, comprising the steps of forming an initial layer on a substrate, the initial layer including carbon nanotubes and nano metal powder; arranging a semiconductor chip on the initial layer; and heat-treating the initial layer with a sintering temperature of the nano metal powder to obtain a thermal interface material of the carbon nanotubes and the nano metal powder.

Abstract: A method of forming a phosphor coating layer on a light emitting diode (LED) chip using electrophoresis includes separating phosphor particles in a suspension according to a particle size, and coating the phosphor particles on a surface of the LED chip by sequentially depositing the separated phosphor particles on the surface of the LED chip according to the particle size. An apparatus to form a phosphor coating layer on an LED chip includes an electrophoresis bath to accommodate a suspension containing phosphor particles separated into layers according to a particle size, and electrodes disposed inside the electrophoresis bath. The electrodes may include a cathode electrode on which the LED chip may be arranged, and an anode electrode.

Abstract: A conversion type light emitting device includes at least one LED element having a predetermined light emitting range and a fluorescent element performing wavelength conversion of light emitted from the LED element when disposed at a first location in the predetermined light emitting range. The fluorescent element is movable from a first location to a second location outside the predetermined light emitting range.

Abstract: A conversion type light emitting device includes at least one LED element having a predetermined light emitting range and a fluorescent element performing wavelength conversion of light emitted from the LED element when disposed at a first location in the predetermined light emitting range. The fluorescent element is movable from a first location to a second location outside the predetermined light emitting range.

Abstract: A lighting apparatus includes a light reflector, a light emitting diode (LED) and a light-changing film. The light reflector has a concave surface. The LED is disposed under the concave surface of the light reflector to provide the concave surface with light. The light-changing film converts a first light generated by the LED into a second light. For example, the light-changing film may be a fluorescent film receiving the first light and emitting the second light with increased wavelength. The LED and the light-changing film are spaced apart from each other to minimize discoloration of the light-changing film.

Abstract: A method of forming a phosphor coating layer on a light emitting diode (LED) chip using electrophoresis includes separating phosphor particles in a suspension according to a particle size, and coating the phosphor particles on a surface of the LED chip by sequentially depositing the separated phosphor particles on the surface of the LED chip according to the particle size. An apparatus to form a phosphor coating layer on an LED chip includes an electrophoresis bath to accommodate a suspension containing phosphor particles separated into layers according to a particle size, and electrodes disposed inside the electrophoresis bath. The electrodes may include a cathode electrode on which the LED chip may be arranged, and an anode electrode.