Abstract:
A display apparatus which uses a laser to realize a clear image by reducing speckle noise is provided. The display apparatus comprises a laser light source which emits light a scanning mirror which scans light emitted by the laser light source, a speckle removing mirror which periodically reciprocates within a predetermined rotating angle, and projects the light scanned by the scanning mirror, to a screen, and an image processor which processes image data to shift an image by frame corresponding to the rotation of the speckle removing mirror.
Abstract:
A light source and an image apparatus which can reduce a rainbow effect and a color separation phenomenon in a pixel are provided. A different waveform is provided according to a color of the light source and methods of driving the light source and the image apparatus, respectively. The light source outputs beams of one or two colors from among three primary colors in a corresponding pixel section of a first scan section, in two scan sections for generating an entire image composed of a plurality of pixel images, to generate each pixel image and outputs a beam or beams of the remaining color or colors among the three primary colors in a corresponding pixel section of a second scan section. The image apparatus includes a light source, an optical modulation device receiving beams from the light source and modulating the received beam into image components, a reflector receiving the image components from the optical modulation device and scanning the received image components onto a screen, and a control unit controlling the light source to output beams of one or two colors among three primary colors in a corresponding pixel section of a first scan section and output a beam or beams of the remaining color or colors among the three primary colors in a corresponding pixel section of a second scan section, wherein the first scan section and the second scan section are for generating an entire image composed of a plurality of pixel images.
Abstract:
An illumination unit is provided which includes a glass rod including a parabolic reflection surface, a light incident surface facing the parabolic reflection surface, a concave portion formed inwardly in the light incident surface at a position of a focal point of the parabolic reflection surface, and a light guide portion facing the parabolic reflection surface and having a rectangular section. An LED module is disposed at the focal point of the parabolic reflection surface and emitting light to the parabolic reflection surface through the concave portion. A surface of the light guide portion parallel to the light incident surface is stepped from the light incident surface in a direction in which the rectangular section of the light guide portion decreases.
Abstract:
An illumination system and a projection system capable of enhancing light efficiency and contrast. The projection system includes a display panel from which light incident to a projection lens unit is controlled according to the rotation of a plurality of micromirrors and an asymmetric stop which adjusts an angle of effective light incident from the display panel. The illumination system emitting light to the projection system includes: one or more light source units each including a single or an array of light emitting devices and having a light exit surface with an aspect ratio different from an aspect ratio of the display panel; and an aspect ratio adjusting unit adjusting the aspect ratio of the light such that the aspect ratio of the light exit surface of each of the light source units can be equal to the aspect ratio of the display panel.
Abstract:
An image display method of improving brightness of an output image in an image display device using a sequential driving method and a plurality of single-color light sources. The image display method includes extracting a white color component from the primary color image signals, calculating a period to display the white color component, converting the primary color image signals into shortened primary color image signals and a white color image signal based on the period to display the white color component, and driving the single-color light sources together during a period to display the white color image signal and sequentially driving the single-color light sources during a period to display the shortened primary color image signals. The brightness of output images is improved by displaying the white color image signal by simultaneously driving the single-color light sources based on a ratio of a lowest gradient to a highest gradient of the primary color signals.
Abstract:
A projection display including first through third light source units to radiate first through third light beams having different colors, respectively, a light path combining unit 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. The light path combining unit includes first and second prisms. The first prism includes first and second incidence surfaces, through which the first and second light beams are incident, respectively, a first emission surface, and a first selective reflection surface to transmit the second light beam toward the first emission surface. The second prism includes a third incidence surface, through which the third light beam is incident, a fourth incidence surface, through which the first and second light beams emitted through the first emission surface are incident, a second emission surface, and a second selective reflection surface to reflect the third light beam and to transmit the first and second light beams toward the second emission surface.
Abstract:
A display apparatus and a backlight assembly are provided. The display apparatus includes a display panel; and a backlight unit disposed on a rear surface of the display panel and discharging light to the display panel, the backlight unit comprising white light emitting diodes (LEDs) and Quantum Dot (QD) LEDs.
Abstract:
A light emitting unit and a liquid crystal display apparatus including the same are provided. The light emitting unit includes a light source unit which generates light, and a driving board which drives the light source unit. The light source unit includes a light source which generates the light, a container member which forms an opening therein and which contains the light source within the opening, and a fluorescent member mounted in the opening of the container member. The light source and the florescent member are spaced apart.
Abstract:
A backlight unit is provided which includes: a light guide plate which guides incident light from a lateral side of the light guide plate toward a liquid crystal display (LCD) panel placed in front of the light guide plate; a light source unit which includes a light source which emits the light and a light source supporting member which supports the light source and is arranged adjacent to the lateral side of the light guide plate; a supporting frame which is arranged in the backlight unit; a quantum dot (QD) bar which is arranged between the lateral side of the light guide plate and the light source and changes a color of the light emitted from the light source; and a QD-bar fastening unit which fastens the QD bar to at least one of the light source supporting member and the supporting frame.
Abstract:
A display apparatus is provided. The display apparatus includes a display panel which alternately displays a left-eye image and a right-eye image, a backlight unit which includes a plurality of different types of light sources and which is disposed on a rear surface of the display panel to emit light toward the display panel, a driving unit which drives the backlight unit, and a control unit which controls the different types of light sources to be used to display the left-eye image and the right-eye image, respectively.