Abstract:
An illuminating unit having a plurality of light emitting devices and collimators and a projection type image display apparatus using the same are provided. The illuminating unit includes: a plurality of light emitting devices which output light beams of predetermined wavelengths; a plurality of collimators, each having a parabolic reflection surface for reflecting the light beam in a predetermined direction, a mounting section for locating the light emitting device at the focal point of the parabolic reflection surface, a light output surface opposite to the parabolic reflection surface, and a light guide section for guiding the light beam reflected from the parabolic reflection surface to the light output surface; and one or more fixing members having two or more steps for mounting the light emitting devices and the collimators on their top surface. A plurality of light emitting devices and collimators are efficiently arranged in a small space. Therefore, thermal concentration can be reduced and heat can be effectively discharged.
Abstract:
An illuminating unit includes a reflector including a parabolic reflecting surface and an incident portion and an exit portion intersecting with each other a light source to emit a beam onto the reflecting surface through the incident portion, a light source deviation compensator disposed between the reflector and the light source to focus an image of the light source is focused to a focal point of the reflecting surface, and a light path changer to direct at least a portion of a beam with a radiation angle less than an angle of the exit portion toward the reflecting surface.
Abstract:
A side light-emitting device, a backlight unit using the side light-emitting device as a light source, and a liquid crystal display (LCD) apparatus employing the backlight unit. The side light-emitting device includes a light-emitting device to generate light and a side emitter disposed adjacent to the light-emitting device to emit the light incident from the light-emitting device in a lateral direction. The side emitter includes a reflecting surface to reflect incident light, and a reflecting/refracting surface to totally internally reflect light incident directly from the light-emitting device to the reflecting surface and to refract the light incident from the reflecting surface so that the refracted light propagates in the lateral direction. Since the side light-emitting device emits most the light in the lateral direction, using the side light-emitting device as a light source in a backlight unit allows light to be mixed evenly.
Abstract:
A color prism capable of separating incident light into four color beams and synthesizing incident four-color beams, and a projection-type image display apparatus employing the color prism. The color prism includes: first through third triangular prisms each having two boundary surfaces which face the other two triangular prisms, and an outer surface which transmits or reflects incident light according to an incidence angle of the light; and first through third dichroic filters respectively interposed among the first through third triangular prisms and selectively transmits or reflects incident light according to wavelength so as to separate incident light into first through fourth light beams according to wavelength ranges and synthesize incident first through fourth light beams. The projection-type image display apparatus includes: a light source emitting light; a polarization beam splitter to transmit or reflect incident light according to a polarization direction; the color prism; first through fourth image forming devices disposed to face the outer surfaces of the first through third triangular prisms, and selectively modulates incident first through fourth light beams by pixels to form images and reflects the formed images to the color prism; and a projection lens unit to enlarge and project an incident image formed by the first through fourth image forming devices and synthesized by the color prism onto a screen.
Abstract:
A projection display includes first through third light source units to radiate first through third light beams, respectively, having different colors, an X-cube prism to combine paths of the first through third light beams, an optical modulator to sequentially modulate the first through third light beams according to image information, and a projection lens unit to magnify and project the modulated light beams onto a screen. Each of the first through third light source units includes at least one optical module. The optical module includes a collimator having a first reflective surface in a parabolic shape, and a compact light source located in the vicinity of a focal point of the first reflective surface.
Abstract:
A liquid crystal display (LCD) includes a cover assembly; a liquid crystal panel; a light guide plate configured to guide light to the liquid crystal panel; a printed circuit board (PCB) to which the light guide plate is mounted; and a light emitting diode (LED) package which is mounted on the PCB and emits light to a lateral side of the light guide plate. The PCB includes a base substrate; a connecting hole which is formed in the base substrate to couple the base substrate to the cover assembly with a connecting member; an insulating layer which is coated on the base substrate while avoiding a head part of the connecting member; and a spacer tape which is provided on an upper side of the insulating layer so that the light guide plate is evenly mounted on the PCB.
Abstract:
A liquid crystal display is provided. The liquid crystal display includes a liquid crystal panel, a light guide plate disposed below the liquid crystal panel, and a light source unit which emits light to at least one side surface of the light guide plate. The light source unit includes light source elements which are disposed adjacent to the at least one side surface of the light guide plate, and which emit light that is incident on the at least one side surface of the light guide plate. A printed circuit board is disposed adjacent to a lower surface of the light guide plate and supports the light source elements.
Abstract:
A side light-emitting device, a backlight unit using the side light-emitting device as a light source, and a liquid crystal display (LCD) apparatus employing the backlight unit. The side light-emitting device includes a light-emitting device to generate light and a side emitter disposed adjacent to the light-emitting device to emit the light incident from the light-emitting device in a lateral direction. The side emitter includes a reflecting surface to reflect incident light, and a reflecting/refracting surface to totally internally reflect light incident directly from the light-emitting device to the reflecting surface and to refract the light incident from the reflecting surface so that the refracted light propagates in the lateral direction. Since the side light-emitting device emits most the light in the lateral direction, using the side light-emitting device as a light source in a backlight unit allows light to be mixed evenly.
Abstract:
A display apparatus includes a display panel and a backlight which supplies the display panel with light. The backlight unit includes a lighting source; a light converting unit which converts light emitted from the lighting source into uniform light; and a light incidence angle controlling unit which increases an angle of incidence of the light entering the light converting unit.
Abstract:
A color prism capable of separating incident light into four color beams and synthesizing incident four-color beams, and a projection-type image display apparatus employing the color prism. The color prism includes: first through third triangular prisms each having two boundary surfaces which face the other two triangular prisms, and an outer surface which transmits or reflects incident light according to an incidence angle of the light; and first through third dichroic filters respectively interposed among the first through third triangular prisms and selectively transmits or reflects incident light according to wavelength so as to separate incident light into first through fourth light beams according to wavelength ranges and synthesize incident first through fourth light beams. The projection-type image display apparatus includes: a light source emitting light; a polarization beam splitter to transmit or reflect incident light according to a polarization direction; the color prism; first through fourth image forming devices disposed to face the outer surfaces of the first through third triangular prisms, and selectively modulates incident first through fourth light beams by pixels to form images and reflects the formed images to the color prism; and a projection lens unit to enlarge and project an incident image formed by the first through fourth image forming devices and synthesized by the color prism onto a screen.