Abstract:
A display panel is driven in any one mode of an external light transmission mode and an external light reflection mode. The display panel includes an upper plate including a first substrate, at least one first electrode layer formed on an inner surface of the first substrate, and a first polarizing film formed on an outer surface of the first substrate and having a first polarization axis, a lower plate including a second substrate, at least one second electrode layer formed on an inner surface of the second substrate, and a second polarizing film formed on an outer surface of the second substrate and having a second polarization axis perpendicular or parallel to the first polarization axis, an LC layer filled between the upper plate and the lower plate, and an LC driving power supply connected between the first electrode layer and the second electrode layer and configured to selectively provide an LC driving voltage to the LC layer. The LC layer has a first arrangement in which a polarization direction of incident light is changed by a preset angle in an entire region of the LC layer when the LC driving voltage is not applied, or a second arrangement in which the polarization direction of the incident light is maintained in at least partial region of the LC layer, to which the LC driving voltage is applied, when the LC driving voltage is applied. The first polarizing film includes an absorptive polarizing film, and the second polarizing film includes a reflective polarizing film.
Abstract:
An illumination unit and an image projection apparatus having the same are provided. The illumination unit includes: at least one light source unit which radiates a collimated light beam; an optical integrator which converts the collimated light beam from the at least one light source unit into a uniform light beam; and a condensing lens system, disposed between the at least one light source unit and the optical integrator, which reduces a cross-section of the collimated light beam emitted from the at least one light source unit and then guides the collimated light beam with the reduced cross-section to the optical integrator and has a 1:1 conjugate property between an object and an image of the object.
Abstract:
A liquid crystal display apparatus includes a liquid crystal panel (100) configured to display images; at least one light source (200) configured to supply light to the liquid crystal panel (100); a front chassis member (300) and a rear chassis member (400) configured to accommodate the liquid crystal panel (100) and the light source module (200) and a circuit board (800) configured to control the liquid crystal display apparatus. The rear chassis member (400) may include a light source supporting portion (410) supporting the at least one light source (200) and a plurality of side surface portions (430,440,450,460) extending from the light source supporting portion to the rear chassis member. The circuit board may be disposed in at least one of the side surface portions.
Abstract:
An illumination optical unit and a display apparatus having the same are provided. The display apparatus includes an illumination optical unit which generates and illuminates light; a display element which forms an image by the light illuminated from the illumination optical unit; and a projection optical unit which projects the image formed in the display element on a screen. The illumination optical unit includes a light source which includes a light emitting area, and a polarization converting unit which includes a plurality of polarization prisms which polarize and convert an entering light from the light source. The light source is disposed so that a long width of the light emitting area corresponds to a long width of the polarization prisms.
Abstract:
An illumination optical unit and a display apparatus having the same are provided. The display apparatus includes an illumination optical unit which generates and illuminates light; a display element which forms an image by the light illuminated from the illumination optical unit; and a projection optical unit which projects the image formed in the display element on a screen. The illumination optical unit includes a light source which includes a light emitting area, and a polarization converting unit which includes a plurality of polarization prisms which polarize and convert an entering light from the light source. The light source is disposed so that a long width of the light emitting area corresponds to a long width of the polarization prisms.
Abstract:
A backlight unit includes a plurality of light emitting diodes (LEDs) which emit light, a first metal substrate on which the plurality of LEDs are mounted, a second metal substrate which is connected to the first metal substrate, a light guide plate which guides the light emitted from the plurality of LEDs toward a liquid crystal panel, and a frame which accommodates the light guide plate and the first and the second metal substrates, wherein the first and the second metal substrates are a heat sink that absorbs heat generated by the plurality of LEDs.
Abstract:
A display panel is driven in any one mode of an external light transmission mode and an external light reflection mode. The display panel includes an upper plate including a first substrate, at least one first electrode layer formed on an inner surface of the first substrate, and a first polarizing film formed on an outer surface of the first substrate and having a first polarization axis, a lower plate including a second substrate, at least one second electrode layer formed on an inner surface of the second substrate, and a second polarizing film formed on an outer surface of the second substrate and having a second polarization axis perpendicular or parallel to the first polarization axis, an LC layer filled between the upper plate and the lower plate, and an LC driving power supply connected between the first electrode layer and the second electrode layer and configured to selectively provide an LC driving voltage to the LC layer. The LC layer has a first arrangement in which a polarization direction of incident light is changed by a preset angle in an entire region of the LC layer when the LC driving voltage is not applied, or a second arrangement in which the polarization direction of the incident light is maintained in at least partial region of the LC layer, to which the LC driving voltage is applied, when the LC driving voltage is applied. The first polarizing film includes an absorptive polarizing film, and the second polarizing film includes a reflective polarizing film.
Abstract:
An illumination unit (100) and an image projection apparatus employing the same. The illumination unit (100) includes: a first reflective surface (120) reflecting light incident thereon; a light-emitting device (130) generating and emitting illuminating light; and a second reflective surface (140) reflecting light emitted from the light-emitting device (130) to a light source surface (131) that includes the light-emitting device (130).
Abstract:
An illumination unit and an image projection apparatus having the same are provided. The illumination unit includes: at least one light source unit which radiates a collimated light beam; an optical integrator which converts the collimated light beam from the at least one light source unit into a uniform light beam; and a condensing lens system, disposed between the at least one light source unit and the optical integrator, which reduces a cross-section of the collimated light beam emitted from the at least one light source unit and then guides the collimated light beam with the reduced cross-section to the optical integrator and has a 1:1 conjugate property between an object and an image of the object.