Abstract: A holographic head-up display device includes: a light source portion that emits coherent light; an optical modulation portion that modulates the coherent light; a relay optical system that focuses the modulated light; a filter mirror that includes a reflection area disposed at a focal position of the relay optical system and reflecting light incident through the relay optical system and an absorption area disposed at the periphery of the reflection area and absorbing light incident through the relay optical system; and a transflective mirror that partially transmits and partially reflects light reflected by the filter mirror.

Abstract: A backlight unit includes: a light source unit including a point light source; and a light guide plate disposed on a path of light emitted from the light source unit, where a plurality of split patterns is defined in the light guide plate. The plurality of split patterns transmits a part of the light emitted from the light source unit and reflects a remaining part thereof, and the plurality of split patterns is concentrically arranged on the light guide plate and around the light source unit.

Abstract: A wavelength conversion member is disclosed. In one aspect, the wavelength conversion member includes a first substrate, a second substrate formed over the first substrate, and a wavelength conversion layer interposed between the first and second substrates. A sealant is interposed between the first and second substrates and surrounds the wavelength conversion layer.

Abstract: A transparent display device includes a transparent display panel which displays an image, a scan driver which provides a scan signal to the transparent display panel, a data driver which driver converts image data into a data signal based on an applied gamma curve and provides the data signal to the transparent display panel, a timing controller which controls the scan driver and the data driver, and a gamma curve adjuster which adjusts the applied gamma curve based on a reference gamma value of a reference gamma curve, luminance of incident light that enters the transparent display panel, light transmittance of the transparent display panel, and panel-luminance of the transparent display panel.

Abstract: A wavelength conversion member is disclosed. In one aspect, the wavelength conversion member includes a first substrate, a second substrate formed over the first substrate, and a wavelength conversion layer interposed between the first and second substrates. A sealant is interposed between the first and second substrates and surrounds the wavelength conversion layer.

Abstract: A method of compensating color of a transparent display device includes generating a first pixel data by adding an input image pixel data and an external optical data which represents an effect of an external light on the transparent display device, generating a second pixel data having the same color as the input image pixel data by scaling the first pixel data, and generating an output image pixel data by subtracting the external optical data from the second pixel data.

Abstract: A method of operating a display device is proposed. In the method, an input gray data is received, a luminance of external light is measured, the input gray data is converted into a linear gray data that is linearly proportional to a lightness obtained from a sum of a luminance of the display device and the luminance of the external light, and a display panel is driven by the use of the linear gray data.

Abstract: A nanophosphor sheet is presented. The nanophosphor sheet may include a base layer, a plurality of core-shell phosphors dispersed in the base layer, and a coating layer surrounding at least one core-shell phosphor among the plurality of core-shell phosphors. Also presented is a backlight device that includes a light source emitting light, a light guide plate receiving the light, and a plurality of core-shell phosphors positioned to receive the light and convert the light to white light. The core-shell phosphors may be incorporated into the light guide plate or be positioned on the light guide plate as a separate layer.

Abstract: A method of compensating color of a transparent display device includes generating a first pixel data by adding an input image pixel data and an external optical data which represents an effect of an external light on the transparent display device, generating a second pixel data having the same color as the input image pixel data by scaling the first pixel data, and generating an output image pixel data by subtracting the external optical data from the second pixel data.

Abstract: A nanophosphor sheet is presented. The nanophosphor sheet may include a base layer, a plurality of core-shell phosphors dispersed in the base layer, and a coating layer surrounding at least one core-shell phosphor among the plurality of core-shell phosphors. Also presented is a backlight device that includes a light source emitting light, a light guide plate receiving the light, and a plurality of core-shell phosphors positioned to receive the light and convert the light to white light. The core-shell phosphors may be incorporated into the light guide plate or be positioned on the light guide plate as a separate layer.

Abstract: A wavelength conversion member is disclosed. In one aspect, the wavelength conversion member includes a first substrate, a second substrate formed over the first substrate, and a wavelength conversion layer interposed between the first and second substrates. A sealant is interposed between the first and second substrates and surrounds the wavelength conversion layer.

Abstract: A silicate phosphor composition is provided having a ?-phase of an orthorhombic crystal structure whose space group is Pbnm 62, and whose composition is represented by the following chemical formula: Ca2-x-y-zMxSiO4:yCe3+,zN(0?x<0.5,0<y?0.1,0?z<0.15) In the formula, M represents at least one member selected from the group consisting of Mg, Sr, Ba, Zn, Na, Al, Ga, Ge, P, As and Fe, and N represents at least one member selected from the group consisting of Eu2+, Mn2+, Tb3+, Yb2+ and Tm3+. The silicate phosphor has a maximum absorbance for a wavelength of about 450 nm to about 475 nm corresponding to a main part of a blue excitation light, and has a great stability at a high temperature. As such the silicate phosphor may be used in combination with a blue light source to produce a white light.

Abstract: A display device comprises a optical member, a plurality of light sources to illuminate the optical member, a representative determining part to determine representative values of image blocks based on image signals applied to the image blocks, wherein the image blocks are arranged in a matrix and correspond to portions of a display panel, a representative integration part to integrate the representative values of the image blocks in one of a row and a column direction of the matrix and determine integrated representative values, and a light control part to control the plurality of light sources based on the integrated representative values.

Abstract: A liquid crystal display (LCD) includes: a light source unit to provide light to a liquid crystal panel and includes first point light sources and second point light sources; a first timing controller to transmit a first image signal and a second image signal to the liquid crystal panel; a second timing controller to transmit optical data, which includes first information to turn on the first point light sources and the second point light sources at different times; and a light source driver to control the first point light sources and the second point light sources to be turned on and off according to the optical data. A method of driving an LCD includes turning on and off first and second point light sources according to received first and second image signals.

Abstract: There is provided a backlight assembly that supplies light to an LCD panel. The backlight assembly includes an LED assembly and a backlight unit. The LED assembly includes at least one LED block region having a plurality of LEDs. The backlight unit driving unit includes a color control unit that determines a representative color of the LED block region using an image signal supplied to the LCD panel, and a dimming control unit that controls the color of the LED block region based on the representative color determined by the color control unit.

Abstract: A nanophosphor sheet is presented. The nanophosphor sheet may include a base layer, a plurality of core-shell phosphors dispersed in the base layer, and a coating layer surrounding at least one core-shell phosphor among the plurality of core-shell phosphors. Also presented is a backlight device that includes a light source emitting light, a light guide plate receiving the light, and a plurality of core-shell phosphors positioned to receive the light and convert the light to white light. The core-shell phosphors may be incorporated into the light guide plate or be positioned on the light guide plate as a separate layer.

Abstract: A backlight unit assembly, a liquid crystal display having the same, and a dimming method thereof are provided. The dimming method for a liquid crystal display includes setting a plurality of lookup tables, each lookup table having different data for adjusting luminance corresponding to a same grayscale, calculating a grayscale average of a whole liquid crystal display panel and grayscale averages of individual liquid crystal display panel blocks with respect to an image signal input to the liquid crystal display panel, selecting one of the plurality of lookup tables in accordance with the whole grayscale average, and calculating the data for obtaining the luminance corresponding to the individual grayscale averages in the selected lookup table, and adjusting and applying power to a light emitting diode assembly using the calculated data.

Abstract: A method of driving a light source, a light source apparatus for performing the method, and a display apparatus having the light source apparatus are disclosed in accordance with one or more embodiments. In the method, a plurality of light source strings connected in parallel is driven by applying a driving voltage to a first terminal of the light source strings. A peak current due to a voltage deviation of each of the light source strings is switch-controlled to uniform an average current of the light source strings. Thus, a peak current flowing through light source strings in accordance with a voltage deviation of the light source strings is switch-controlled, so that an average current of the light source strings may be uniformly maintained. Therefore, a voltage deviation is not consumed as power, so that damage to circuit elements due to heat may be prevented.

Abstract: A two-dimensional light source includes a base substrate having holes, wires disposed on a lower surface of the base substrate, a light emitting diode (LED) chip disposed on an upper surface of the base substrate, plugs that connect two electrodes of the LED chip to the wires through the holes, a buffer layer covering the LED chip, and an optical layer that is disposed on the buffer layer and has an optical pattern formed at a portion of the optical layer corresponding to the LED chip.

Abstract: A method of driving light sources controls amounts of light from light-emitting diode (LED) strings based on pulse signals to operate the LED strings connected in parallel. Voltages are synchronized with the pulse signals at input terminals of control circuits to detect the voltages, the control circuits being connected to the LED strings and controlling resistance variations of the LED strings. The operation of the LED strings is stopped when the detected voltage is out of a predetermined allowable voltage range due to a short-circuited LED. Therefore, a light source device may be protected by stopping the operation of the LED strings.