Abstract: A display apparatus is provided. The display apparatus includes a front side that is exposed the outside. A refractor or set of refractors is positioned so as to minimize the appearance of a shield member to a viewer, thus causing a non-display region of the display apparatus to appear to be smaller than its actual size, thus increasing a size of an image display region of the display apparatus.

Abstract: A display apparatus is provided. The display apparatus includes a front side that is exposed the outside. A refractor or set of refractors is positioned so as to minimize the appearance of a shield member to a viewer, thus causing a non-display region of the display apparatus to appear to be smaller than its actual size, thus increasing a size of an image display region of the display apparatus.

Abstract: A system for purifying an exhaust gas may include a catalyzed particulate filter trapping particulate matters contained in the exhaust gas, a diesel oxidation catalyst oxidizing carbon monoxide and hydrocarbon in the exhaust gas, a selective catalyst reduction apparatus reducing nitrogen oxide contained in the exhaust gas, a dosing module located upstream of the selective catalyst reduction apparatus and dosing a reducing agent into the exhaust gas, and a control portion controlling an operation of an engine, wherein the catalyzed particulate filter, the diesel oxidation catalyst, the selective catalyst reduction apparatus, and the dosing module are mounted on an exhaust pipe, and the selective catalyst reduction apparatus is mounted downstream of the catalyzed particulate filter and the diesel oxidation catalyst, and wherein the control portion controls flow of the exhaust gas and the engine to raise an exhaust gas temperature if a heating mode enter condition is satisfied.

Abstract: A system for controlling urea injection quantity of a vehicle, may include an SCR device, the SCR device purifying NOx, a pump configured to supply the SCR device with a urea solution of a urea tank through a urea supply line, a dosing injector disposed on the exhaust pipe at upstream side of the SCR device and injecting the urea solution, and a control portion that closes the dosing injector not to exhaust the urea solution that is charged in the urea supply line if operation of the engine is stopped and outside temperature is higher than a predetermined base temperature, and that stops the pump and opens the dosing injector to exhaust the urea solution charged in the urea supply line to the urea tank if operation of the engine is stopped and the outside temperature is equal to or lower than the predetermined base temperature.

Abstract: A projection lens unit and a thin projector using the same are disclosed. The projection lens unit includes a plurality of lens sets for emitting light carrying an image, and a reflector arranged between adjacent ones of the lens sets or at a downstream end of the lens sets, and adapted to change a direction of light incident on the reflector.

Abstract: Particles for an electronic paper display device and a method for preparing the same. Since charged particles have a constant electrification amount, a moving speed and a moving amount of the charged particles are uniformly controlled at the time of an electrophoresis. Also, a response speed and a resolution of an electronic paper display device are improved, and an amount of a voltage applied to the electronic paper display device is precisely controlled.

Abstract: A thin projector is disclosed. The thin projector includes a housing having an upright panel shape, an illumination unit arranged in the interior of the housing, the illumination unit generating light and emitting the generated light, a micro device arranged in the interior of the housing, the micro device receiving the light from the illumination unit and producing an image using the received light, and a projection lens unit arranged in the interior of the housing, the projection lens unit including an emission unit adapted to externally emit the image produced by the micro device and arranged to be externally exposed through a front side of the housing.

Abstract: An electronic paper display device includes a plurality of electrodes, a plurality of barrier ribs, at least one display cell defined by the electrodes and the barrier ribs. The at least one display cell includes a charged particle having a protective layer surrounding each particle, and an insulating layer positioned on at least one internal surface of the display cell. The protective layer and the insulating layer may include the same material or a different material.

Abstract: A projection type display optical system is provided to resolve problems of keystone distortion, and to improve illumination efficiency and contrast uniformity of an image.

Abstract: An image projector is disclosed. The image projector includes a lamp emitting light rays, a filtering unit having a first device including a plurality of color filters including a white color filter each formed to correspond to a section therein, and a second device including a plurality of color filters except a white color filter each formed to correspond to a section therein and formed at one side of the first device, and filtering the light rays emitted from the lamp through any one of the first device and the second device, a rod lens focusing and projecting the light rays separated from the filtering unit, and a digital micromirror device displaying an image through electric signals in accordance with the projected light rays.

Abstract: Particles for an electronic paper display device and a method for preparing the same. Since charged particles have a constant electrification amount, a moving speed and a moving amount of the charged particles are uniformly controlled at the time of an electrophoresis. Also, a response speed and a resolution of an electronic paper display device are improved, and an amount of a voltage applied to the electronic paper display device is precisely controlled.

Abstract: An electronic paper display device includes a plurality of electrodes, a plurality of barrier ribs, at least one display cell defined by the electrodes and the barrier ribs. The at least one display cell includes a charged particle having a protective layer surrounding each particle, and an insulating layer positioned on at least one internal surface of the display cell. The protective layer and the insulating layer may include the same material or a different material.

Abstract: An electrode of an E-paper panel having a lattice structure, wherein an electric field concentrated on edge regions of the electrode is dispersed, and thus while driving a cell, charged particles are uniformly distributed over an entire region of the cell, thereby improving display performance. For this purpose, the E-paper panel includes a driving electrode integrally driven by a driving signal for driving a cell, a portion of the driving electrode corresponding to the cell region being partially removed according to a particular pattern.

Abstract: A projection type display optical system is provided to resolve problems of keystone distortion, and to improve illumination efficiency and contrast uniformity of an image. The system includes: a light source; an image display means on which a light ray is irradiated; and an illumination unit comprising: a rod lens emitting a brightness unified light ray; a first lens; an optical unit; and a projection part, wherein the first lens and the optical unit are set so that an optical axis of the optical unit and an optical axis of the first lens do not coincide with each other, whereby a surface image formed is not inclined to the surface of the image display means.

Abstract: An image projector is disclosed. The image projector includes a lamp emitting light rays, a filtering unit having a first device including a plurality of color filters including a white color filter each formed to correspond to a section therein, and a second device including a plurality of color filters except a white color filter each formed to correspond to a section therein and formed at one side of the first device, and filtering the light rays emitted from the lamp through any one of the first device and the second device, a rod lens focusing and projecting the light rays separated from the filtering unit, and a digital micromirror device displaying an image through electric signals in accordance with the projected light rays.

Abstract: A projection type display optical system is provided to resolve problems of keystone distortion, and to improve illumination efficiency and contrast uniformity of an image.

Abstract: An optical system of a liquid crystal projector that is capable of reducing a full length of the optical system including three reflective liquid crystal display panels. In the system, an illuminating unit allows a white light generated from a light source to have any one linear polarized light and a uniform light distribution. A color separator separates the white light from the illuminating unit in accordance with a wavelength band to obtain a first color light, and polarization-converts the remaining lights in accordance with a wavelength band and then separates them into second and third color lights depending on their polarization components. First to third liquid crystal display panels uses the first to third color lights from the color separator to implement first to third color pictures, respectively. A picture combining unit combines the first to third color lights having acquired picture information from the first to third liquid crystal display panels.

Abstract: An optical system of a liquid crystal projector that is capable of reducing a full length of the optical system including three reflective liquid crystal display panels. In the system, an illuminating unit allows a white light generated from a light source to have any one linear polarized light and a uniform light distribution. A color separator separates the white light from the illuminating unit in accordance with a wavelength band to obtain a first color light, and polarization-converts the remaining lights in accordance with a wavelength band and then separates them into second and third color lights depending on their polarization components. First to third liquid crystal display panels uses the first to third color lights from the color separator to implement first to third color pictures, respectively. A picture combining unit combines the first to third color lights having acquired picture information from the first to third liquid crystal display panels.

Abstract: A display combined with a slide projector and liquid crystal projector is disclosed including a light source for emitting light, light collecting means for collecting light emitted from the light source, and image display device having image information so as to enlarge and project an image displayed on the image display device. The image display device includes a first display device for receiving electrical video information and converting it into optical video information; a second display device in which video information is recorded optically; and selecting means for selecting the first or second display device.