By doping an organic compound functioning as an electron donor (hereinafter referred to as donor molecules) into an organic compound layer contacting a cathode, donor levels can be formed between respective LUMO (lowest unoccupied molecular orbital) levels between the cathode and the organic compound layer, and therefore electrons can be injected from the cathode, and transmission of the injected electrons can be performed with good efficiency. Further, there are no problems such as excessive energy loss, deterioration of the organic compound layer itself, and the like accompanying electron movement, and therefore an increase in the electron injecting characteristics and a decrease in the driver voltage can both be achieved without depending on the work function of the cathode material.

Light Emitting Device

A backlight assembly includes a light source unit, a reflective element, a receiving container and a diffusion plate. The light source unit has at least one point light source, and the point light source emits light toward a side surface direction. The reflective element has a reflective surface, and the reflective surface is separated from the point light source toward the side surface direction by a predetermined distance for reflecting the light from the point light source toward an upper direction. The receiving container has a bottom plate and a side wall, for receiving the light source unit and the reflective element. A diffusion plate is disposed over the light source unit and the reflective element. Thus, uniform brightness may be enhanced, and the thickness of a display apparatus may be reduced.

Backlight assembly and display apparatus having the same

A light emitting device includes: a substrate having a concave portion formed on a surface thereof; a light emitting element emitting a first light which is a blue light or a near-ultraviolet light; a resin sheet being a deformable resin sheet formed on the substrate so as to cover the light emitting element; a first transmissive layer formed in a hemispherical shape on the first region of the resin sheet, and transmitting the first light; a color conversion layer including a fluorescent material that converts the first light into a second light of a different wavelength from that of the first light and a transmissive material that transmits the first light, the color conversion layer covering the first transmissive layer in such a manner that an end portion reaches an upper face of the resin sheet; and a second transmissive layer covering the color conversion layer in such a manner that an end portion reaches the upper face of the resin sheet, and transmitting the first light and the second light.

Light emitting device and method for manufacturing the same

A light emitting device including a light emitting structure including a second conductive type semiconductor layer, an active layer, and a first conductive type semiconductor layer, and a first protective layer disposed on a side of the light emitting structure, wherein the first protective layer overlaps with the first conductive type semiconductor layer in a vertical direction.

Light emitting device and light emitting device package

Some embodiments provide a light-emitting device comprising: a light-emitting diode 50; a substantially transparent encapsulating material 80 having a refractive index in the range of about 1.3 to about 1.8; a layer 70 of low refractive index material having a refractive index in the range of about 1 to about 1.2; and a translucent ceramic phosphor 60 having a refractive index in the range of about 1.6 to about 2.7, and which is substantially dome-shaped with substantially uniform thickness. Some embodiments provide a light-emitting device comprising: a substrate 90; a light-emitting diode 50 mounted on a surface of the substrate; and a substantially hemispheric cover mounted on the surface of the substrate so as to enclose the light emitting diode; wherein the substantially hemispheric cover comprises an outer layer 60, a middle layer 70, and an inner layer 80 arranged concentrically, with the inner layer being nearest the light-emitting diode and the outer layer being a translucent ceramic phosphor.

Light-emitting device comprising a dome-shaped ceramic phosphor

Disclosed herein is an LED device which comprises a light-emitting diode (LED) and a laminate formed on the LED, the laminate consisting of a substrate and a phosphor thin film laminated on the substrate, wherein the phosphor thin film has a two-dimensional nanoperiodic structure formed in a forward direction of the thin film and has an extinction coefficient of 10 −3 or less. The LED device has higher luminescent efficiency and luminance than conventional LED devices. In addition, since the LED device uses no slurry and a lesser amount of phosphor than conventional LED devices, it is advantageous in terms of optical homogeneity and reduced costs.

Led Device Comprising Thin-Film Phosphor Having Two Dimensional Nano Periodic Structures

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Led Device Comprising Thin-Film Phosphor Having Two Dimensional Nano Periodic Structures