Abstract: A varifocal optical device is provided. The varifocal optical device includes an optical lens, an actuator unit connected with the optical lens and having two areas that are bending-deformed in opposite directions to each other when a voltage is applied thereto, and a supporting unit to support the actuator unit, so that a focus of the optical lens is varied by the bending deformation when the voltage is applied to the actuator unit. Thereby, a driving displacement of the varifocal optical lens can be maximized.

Abstract: An optical lens is provided. The optical lens provides miniaturization and thin size, and reduces the cost and improves productivity by simplifying the structure and manufacturing process. The optical lens includes a light-transmitting substrate with a lens chamber and a fluidic chamber that are connected with each other. The optical lens also includes a light-transmitting elastic film which seals the lens chamber, a buffer elastic film which seals the fluidic chamber, and an actuator on the buffer elastic film which corresponds to the fluidic chamber, and varies the volume of the fluidic chamber to vary a pressure acting on the light-transmitting elastic film.

Abstract: A varifocal lens includes a hollow case having first and second sidewalls facing each other, the first and second sidewalls through which a light passes; at least one light transmission membrane partitioning an inner space of the case into at least two liquid chambers, the at least one light transmission membrane through which a light passes; at least two liquids filled in the at least two liquid chambers; at least one first operating hole formed at the first sidewall; a first actuator disposed to cover the at least one first operating hole and to pressurize the liquid contacting the first sidewall; and a controller configured to control the first actuator to change a focal distance of an optical lens consisting of the first and second sidewalls, the at least two liquids, and the at least one light transmission membrane of the case.

Abstract: A liquid optical lens which changes a focus due to a change in a shape of a translucent elastic membrane according to a change in a fluid pressure of a lens chamber and a manufacturing method thereof are provided. The liquid optical lens forms a dampproof coating membrane on the translucent elastic membrane to prevent a fluid from permeating through the translucent elastic membrane and a swelling phenomenon of the translucent elastic membrane.

Abstract: An image sensing apparatus with artificial ommatidia includes an imaging optical lens group forming a concave focal surface, an artificial ommatidia unit having a curved top surface corresponding to the concave focal surface and a flat bottom surface, and an image sensor disposed under the artificial ommatidia unit. The artificial ommatidia unit is disposed under the imaging optical lens group so that the curved top surface is coincided with the concave focal surface of the imaging optical lens group. The artificial ommatidia unit having a plurality of artificial ommatidia collects light emitting from the imaging optical lens group, and guides the light to the bottom surface thereof.

Abstract: A varifocal optical device is provided. The varifocal optical device includes an optical lens, an actuator unit connected with the optical lens and having two areas that are bending-deformed in opposite directions to each other when a voltage is applied thereto, and a supporting unit to support the actuator unit, so that a focus of the optical lens is varied by the bending deformation when the voltage is applied to the actuator unit. Thereby, a driving displacement of the varifocal optical lens can be maximized.

Abstract: An image forming element, a fabricating method of the image forming element, and an image forming apparatus having the image forming element is provided. The image forming element includes a drum body, a driving circuit mounted within the drum body, a support plate which penetrates through the drum body longitudinally along the drum body, the support plate being coupled to the driving circuit, an insulating layer formed on at least one portion of an outer circumference of the drum body, a conductive polymer layer formed on the insulating layer, the conductive polymer layer including one or more conductive areas and one or more insulating areas, which are aligned in an alternating pattern, and a protective layer formed on the conductive polymer layer, wherein the conductive areas on the conductive polymer layer are electrically connected to the driving circuit.

Abstract: An electroactive polymer actuator and a method for manufacturing the electroactive polymer actuator are provided. The electroactive polymer actuator includes an actuator unit which is a laminate of a plurality of deformation layers; and a support layer which supports the actuator unit so that the actuator unit provides displacement corresponding to a voltage if the voltage is applied to the actuator unit. Therefore, it is possible to provide an electroactive polymer actuator suitable for a compact mobile device with a low driving voltage.

Abstract: An optical lens is provided. The optical lens provides miniaturization and thin size, and reduces the cost and improves productivity by simplifying the structure and manufacturing process. The optical lens includes a light-transmitting substrate with a lens chamber and a fluidic chamber that are connected with each other. The optical lens also includes a light-transmitting elastic film which seals the lens chamber, a buffer elastic film which seals the fluidic chamber, and an actuator on the buffer elastic film which corresponds to the fluidic chamber, and varies the volume of the fluidic chamber to vary a pressure acting on the light-transmitting elastic film.

Abstract: A tunable capacitor using an electrowetting phenomenon includes a first electrode; a second electrode which is spaced apart from the first electrode and faces the first electrode; a fluidic channel which is disposed between the first electrode and the second electrode; a first insulating layer which is disposed between the first electrode and the fluidic channel; and a conductive fluid which is disposed in the fluidic channel and moves along the fluidic channel when a direct current (DC) potential difference occurs between the first and second electrodes. Accordingly, it is possible to fabricate the tunable capacitor with the simplified fabrication process, good reliability and durability, and no restriction on the tuning range.

Abstract: A method of manufacturing a light emitting device includes: forming a plurality of independent light emitting portions on a growth substrate; separating the light emitting portions from the growth substrate; mounting the light emitting portions onto a receiving substrate; and dicing the receiving substrate, onto which the light emitting portions are mounted, into a light emitting unit. Residual stress, which occurs when the light emitting portions are separated from the substrate, can be reduced, and the light emitting portions can be mounted onto the receiving substrate in a fluid state, whereby the light emitting device can be easily mass produced with excellent quality, and its manufacturing costs can be reduced.

Abstract: A MEMS structure includes an element substrate, an electrode pad formed on the element substrate, a MEMS activated element formed on the element substrate, and having an electrode-connecting layer, and a connecting line to electrically connect the electrode pad and the electrode-connecting layer.

Abstract: A method of fabricating a backlight module in which at least one luminescence element is positioned, including: positioning a luminescence element in at least one cavity formed on a carrier; forming a lower electrode on a substrate; transferring the luminescence element positioned on the carrier to the substrate, connecting the luminescence element to a pattern of the lower electrode formed on the substrate, and removing the carrier; forming an insulating layer on a surface of the substrate to which the luminescence element is transferred, and exposing a top region of the luminescence element; and forming an upper electrode on the exposed top region of the luminescence element. Accordingly, the backlight module including very small luminescence elements being of a micro unit in size is easily fabricated.

Abstract: A light emitting device package including: a heat dissipating substrate including a cavity; a first conductive pattern formed on the cavity; a light emitting device installed on the first conductive pattern; and a second conductive pattern formed on the heat dissipating substrate at a periphery of the first conductive pattern. The second conductive pattern is electrically separated from the first conductive pattern, and the first and second conductive patterns supply power required for operating the light emitting device.

Abstract: A light emitting device package including a transparent cover having an electrode pattern formed on a bottom surface thereof; a light emitting device installed below the transparent cover and electrically connected to an external circuit via the electrode pattern; a fixing resin which fixes the light emitting device onto the bottom surface of the transparent cover; and a metal slug provided under the fixing resin to dissipate heat away from the light emitting device.

Abstract: An LED package and a fabrication method thereof are provided. The LED package includes an upper metal plate having an LED-receiving hole therein; a lower metal plate disposed under the upper metal plate; and an insulator which the upper metal plate and the lower metal plate from each other. A portion of the lower metal plate is exposed via the LED-receiving hole and an LED is mounted on the exposed portion of the lower metal plate and is electrically connected to both of the upper and lower metal plates. A protective cover encloses and protects exposed surfaces of the upper and lower metal plates.

Abstract: An LED package includes a substrate having an electrically conductive portion and an electrically non-conductive portion composed of an oxide of the conductive portion; an LED mounted on the conductive portion and electrically connected to the conductive portion; a first electrode disposed on the non-conductive portion and electrically connected to the LED by a wire; and a second electrode disposed on the substrate and electrically connected to the LED.

Abstract: A light emitting diode (LED) array module includes a plurality of LEDs; and a substrate which mounts the LEDs and has a built-in cooling device for cooling heat generated when the LED is driven. The cooling device includes a heat radiation space formed on the substrate and a minute passage member which is wick- or mesh-structured to form a plurality of minute passages that operate by a heat pipe principle in the heat radiation space. The cooling device operating by the heat pipe principle is integrally formed on the substrate mounted with the LEDs, so heat radiation performance of the LEDs is enhanced, such that the LEDs can operate stably for a long time.