2460 results about "High color" patented technology

The present invention relates to an improved EPD which comprises both the traditional up / down switching and the in-plane switching modes. In other words, the improved EPD has dual switching modes.The monochrome EPDs of the present invention are capable of displaying highlight color of choice which is different from the text. For example, white background, blue text, and red highlight can be shown in any selected areas of the display. Furthermore, the full color EPDs of the present invention are capable of displaying high contrast images of high color saturation. Both high quality black and white states are possible in the full color displays of the present invention. The EPDs of the present invention do not need complex circuitry design, and are compatible with low cost and high yield roll-to-roll manufacturing processes.

Disclosed herein is a light emitting device including one or more light emitting diodes to primarily emit light having different wavelengths in the wavelength range of ultraviolet rays and / or blue light, and a wavelength-conversion means to convert the primary light into secondary light in the visible light wavelength range. The light emitting device of the current invention has a high color temperature of 2000 to 8000 K or 10000 K and a high color rendering index of 90 or more, thus easily realizing desired emission on the color coordinate system. Therefore, the lighting emitting device is applicable to mobile phones, notebook computers, and keypads or backlight units for various electronic products, and, in particular, automobiles and exterior and interior lighting fixtures.

The present invention provides organic light emitting devices having a combined emission from at least two emissive materials, a fluorescent blue emissive material and a phosphorescent emissive material. The device may further comprise additional fluorescent or phosphorescent emissive materials. In preferred embodiments, the invention provides OLEDs having three different emissive materials—a red emissive material, a green emissive material and a blue emissive material. The invention provides a device architecture which is optimized for efficiency and lifetime by using a combination of fluorescent and phosphorescent emitters. Further, in preferred embodiments the device architecture provides a high color-stability of the light emission over a wide range of currents or luminances.

A light-emitting device is produced using a phosphor composition containing a phosphor host having as a main component a composition represented by a composition formula: aM3N2.bAlN.cSi3N4, where“M” is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, and “a”, “b”, and “c” are numerical values satisfying 0.2≦a / (a+b)≦0.95, 0.05≦b / (b+c)≦0.8, and 0.4≦c / (c+a)≦0.95. This enables a light-emitting device emitting white light and satisfying both a high color rendering property and a high luminous flux to be provided.

A video coding algorithm supports both lossy and lossless coding of video while maintaining high color fidelity and coding efficiency using an in-loop, reversible color transform. Accordingly, a method is provided to encode video data and decode the generated bitstream. The method includes generating a prediction-error signal by performing intra / inter-frame prediction on a plurality of video frames; generating a color-transformed, prediction-error signal by performing a reversible color-space transform on the prediction-error signal; and forming a bitstream based on the color-transformed prediction-error signal. The method may further include generating a color-space transformed error residual based on a bitstream; generating an error residual by performing a reversible color-space transform on the color-space transformed error residual; and generating a video frame based on the error residual.

The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ two emitters in a single emissive region to sufficiently cover the visible spectrum. White emission is achieved from two emitters in a single emissive region through the formation of an aggregate by one of the emissive centers. This allows the construction of simple, bright and efficient WOLEDs that exhibit a high color rendering index.

The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ two emitters in a single emissive region to sufficiently cover the visible spectrum. White emission is achieved from two emitters in a single emissive region through the formation of an aggregate by one of the emissive centers. This allows the construction of simple, bright and efficient WOLEDs that exhibit a high color rendering index.

A light-emitting device is produced using a phosphor composition containing a phosphor host having as a main component a composition represented by a composition formula: aM3N2.bAlN.cSi3N4, where “M” is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, and “a”, “b”, and “c” are numerical values satisfying 0.2≦a / (a+b)≦0.95, 0.05≦b / (b+c)≦0.8, and 0.4≦c / (c+a)≦0.95. This enables a light-emitting device emitting white light and satisfying both a high color rendering property and a high luminous flux to be provided.

The invention discloses a LED lamp and filament thereof. The LED filament includes a substrate, a light emitting unit secured onto at least one side surface of the substrate, and a package adhesive layer surrounded on the periphery of the light emitting unit; the substrate is configured to be of an elongated bar construction; the light emitting unit comprises a plurality of blue light chips and red light chips regularly distributed on the substrate and sequentially connected to one another in series. For the LED filament of the invention, as the light emitting unit composed of blue and red light chips is disposed on the substrate, the LED filament has high color rendering and large light radiation angle.

Provided are an organic light emitting compound represented by Formula 1 below, an organic light emitting device comprising the same, and a method of manufacturing the light emitting device:wherein CY1, CY2, Ar1, R1 and R2 are described in the detailed description of the invention. An organic light emitting device comprising the organic light emitting compound has low turn-on voltage, high efficiency, high color purity and high luminance.

The present invention relates to an improved EPD which comprises both the traditional up / down switching and the in-plane switching modes. The monochrome EPDs of the present invention are capable of displaying highlight color of choice which is different from the text. For example, white background, blue text, and red highlight can be shown in any selected areas of the display. Furthermore, the full color EPDs of the present invention are capable of displaying high contrast images of high color saturation. Both high quality black and white states are possible in the full color displays of the present invention. The EPDs of the present invention do not need complex circuitry design, and are compatible with low cost and high yield roll-to-roll manufacturing processes. The EPD cells of the present invention may have opaque partition walls, or a black matrix top surface of the partition walls or a combination thereof.

In order to provide a phosphor mixture which contains four or more kinds of phosphors comprising a red phosphor, an orange phosphor, a blue phosphor, and a green phosphor, and produce emission having excellent color rendering not only in the case of white light at a high color temperature, but also in the case of emission in warm white which is low in color temperature, and a light emitting device including the phosphor mixture and a light-emitting section, CaAlSiN3:Eu and CaAl2Si4N8:Eu are manufactured as a red phosphor and an orange phosphor respectively, and ZnS:Cu, Al, and BAM:Eu are prepared as a green phosphor and a blue phosphor respectively. Then the emission spectrums of these four kinds of phosphors are measured and a relative mixing ratio at which the correlated color temperature of the phosphor mixture becomes a targeted color temperature is determined from the emission spectrum by simulation, and a phosphor mixture is obtained by weighing and mixing the respective phosphors based on the simulation result.

The present invention relates to a light-emitting device including a light source, a first light-emitting material spaced apart from the light source, and at least one additional light-emitting material. The first light-emitting material includes low reabsorbing semiconductor nanocrystals having an emission-center core, an exterior protective shell, and at least one inner light-absorbing shell. The device is useful for efficiently producing white light having a high color rendering index.

For two or more versions of a video with different spatial, temporal or SNR resolution, scalability can be achieved by generating a base layer and an enhancement layer. When a version of a video is available that has higher color bit depth than can be displayed, a common solution is tone mapping. A more efficient compression method is proposed for the case where the two or more versions with different color bit depth use different color encoding. The present invention is based on joint inter-layer prediction among the available color channels. Thus, color bit depth scalability can also be used where the two or more versions with different color bit depth use different color encoding. In this case the inter-layer prediction is a joint prediction based on all color components. Prediction may also include color space conversion and gamma correction.

The present invention relates to an improved EPD which comprises both the traditional up / down switching and the in-plane switching modes. In other words, the improved EPD has dual switching modes. The monochrome EPDs of the present invention are capable of displaying highlight color of choice which is different from the text. For example, white background, blue text, and red highlight can be shown in any selected areas of the display. Furthermore, the full color EPDs of the present invention are capable of displaying high contrast images of high color saturation. Both high quality black and white states are possible in the full color displays of the present invention. The EPDs of the present invention do not need complex circuitry design, and are compatible with low cost and high yield roll-to-roll manufacturing processes.

A system and method involving lighting fixtures, a control network, a controller and other devices such as light sensors, input devices and network adapters for coordinating precise brightness and color schedules among the lighting fixtures while maintaining a high color reliability including provisions for managing a plurality of lighting fixtures. The lighting fixtures contain lighting elements selected such that when controlled properly, operating along a daytime locus, the resultant light output closely resembles sunlight on a cloudless day in spectral characteristics, and wherein the total flux of blue light can be adjusted from a relative level of 1-100% the maximum blue flux of the lighting fixture by controlling individual lighting elements.

A solid-state imaging device including a substrate corresponding to a pixel. The substrate carries thereon a light receiving section, which is a stack of, in this order, a photoconductive layer for absorbing light in a wavelength region for red, a photoconductive layer for absorbing light in a wavelength region for green, and a photoconductive layer for absorbing light in a wavelength region for blue. A transparent electrode layer is provided on each of the photoconductive layers. The transparent electrode layer placed above the photoconductive layer and the transparent electrode layer placed below the photoconductive layer are sandwiching a translucent reflective layer for reflecting the light in the green wavelength region. Similarly, a translucent reflective layer is sandwiched between the transparent electrode layer placed above the photoconductive layer and the transparent electrode layer placed below the photoconductive layer for reflecting the light in the blue wavelength region. With such a structure, successfully provided is a single-plate color solid-state imaging device of a photoconductive-layer-stacked type achieving the higher color resolution and the better sensitivity.

A general purpose image and visual effects display apparatus, with associated methods, which is comprised of an array of independently angled reflective or refractive elements wherein the varying angle pattern of each element across said array is designed to reflect or refract specifically designed as well as fortuitously located existing colors, in precisely determined patterns, to make apparent to specific viewing or receiving locations a wide range of complex emergent visual and other effects. In some embodiments very high resolution and high color fidelity image display is possible. In other embodiments moving images akin to video can be displayed, using no electronics or moving parts. In other embodiments true binocular 3D images can be displayed directly to viewers, without the need for special 3D viewing glasses. Many of the embodiments and methods are applicable to non-visible light and other reflectable wave-based phenomena.

The light distribution pattern for a vehicle having a predetermined horizontal cut-off line section at the top portion on one side of the vertical central line and an oblique cut-off line section whose central line side is lowered in another side, and the light distribution pattern of the light source comprising a plurality of semiconductor light emitting devices are almost the same shape. Moreover, the light distribution pattern of the light source is formed by arranging a plurality of semiconductor light emitting devices with a configuration almost the same shape as the light distribution pattern for a vehicle. The semiconductor light emitting device has a luminance surface whose configuration is almost the same shape as the light distribution pattern for a vehicle. Further, the light source comprising the semiconductor light emitting device includes a fluorescent material whose excitation source is the emission from the nitride semiconductor device and a part of region of the fluorescent material emits light with higher luminance or higher color rendering properties compared with the other regions.

The invention relates to the technical field of display, which discloses a quantum dot color filter, a liquid crystal panel and a display device. The quantum dot color filter is used for the liquid crystal panel. The liquid crystal panel is provided with a plurality of pixels, wherein each pixel is provided with a plurality of sub-pixels. Each sub-pixel corresponds to a color. The color filter comprises sub-areas in one-to-one correspondence to the sub-pixels. At least one sub-area is formed by quantum dot materials. Light generated by the quantum dot materials activated is as same as the corresponding sub-pixel in color. According to the invention, the color filter of a display is formed by the quantum dot materials, and a red, or green, or blue filter is made of quantum dot materials which generate red, or green, or blue light through photoexcitation, so that the utilization ratio of a backlight source is improved, and meanwhile, colored light with higher purity can be obtained. Therefore, the quantum dot display can realize high color gamut and low power consumption of color display.

The present invention relates to an improved EPD which comprises both the traditional up / down switching and the in-plane switching modes. The monochrome EPDs of the present invention are capable of displaying highlight color of choice which is different from the text. Furthermore, the full color EPDs of the present invention are capable of displaying high contrast images of high color saturation. Both high quality black and white states are possible in the full color displays of the present invention. The EPDs of the present invention do not need complex circuitry design, and are compatible with low cost and high yield roll-to-roll manufacturing processes.

A phosphor (A) comprising a host material composed of a compound having a garnet crystal structure represented by the general formula (I):M1aM2bM3cOd  (I)(wherein M1 is a divalent metal element, M2 is a trivalent metal element, M3 is a tetravalent metal element containing at least Si, a is the number of 2.7 to 3.3, b is the number of 1.8 to 2.2, c is the number of 2.7 to 3.3, and d is the number of 11.0 to 13.0), and a luminescent center ion incorporated in the host material; a light emitting device (B) comprising the phosphor as a wavelength conversion material and a semiconductor light emitting element capable of emitting a light in the range of from ultraviolet light to visible light; and a display (C) and a lighting system (D) using the light emitting device (B) as a light source. The above phosphor can be readily produced, and can provide a light emitting device having a high color rendering property.

An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy can improve the ink ejection stability and shows a high storage stability and a high color developability. An ink to be used in an ink jet recording method of ejecting an ink from a recording head through action of thermal energy is characterized in that the ink comprises a pigment represented by the general formula (1), a dispersant, a water-soluble organic compound and an aggregation inhibiting substance for inhibiting aggregation after dispersion breakdown of the pigment, and the content (mass %) of the aggregation inhibiting substance with respect to the total mass of ink is 0.4 times or more to less than 1.3 times of the content (mass %) of the pigment with respect to the total mass of ink.

A white beam with high color-rendering index is formed by uniting a collimated red beam and a collimated blue-green beam, the latter having as its source a blue LED with a green phosphor. The white beam is formed by a prism with an amber low-pass dichroic filter. The prism cross-section can be either a square or an equilateral triangle. The triangular prism can have one third of its mass reduced by stepped facets. Both types of prism can be elongated to accommodate multiple collimators. Switching between white, red, and blue-green allows application to police vehicles.

An Ir compound can be a blue phosphorescent material. An organic electroluminescent device can use such a material. An organic layer, such as a light emitting layer, can be composed of the Ir compound. An organic electroluminescent device including such an organic layer may exhibit high color purity and emits dark blue light. Such an organic electroluminescent device may have low consumption power.

An imaging device free from discoloring under high temperature or high irradiation and having high color reproducibility is provided. Multilayer filters made of inorganic materials are provided above respective photoelectric conversion elements. The filters include red filters having predetermined spectra characteristics, green filters having predetermined spectral characteristics, and two kinds of blue filters having spectral characteristics different in peak wavelength.

Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.

A white LED illumination device can include a white LED that has unevenness in tone and is used as a light source. The white LED illumination device can emit white light with high color rendering properties without unevenness in tone and can include the above noted white LED located adjacent an optical lens. The white LED and optical lens can be arranged so that the optical axes of both are substantially aligned with each other. The white LED can include an LED chip which emits light having a peak wavelength in the blue wavelength range and a fluorescent material which can be excited by the light emitted from the LED chip to emit yellow or yellowish green fluorescence (i.e., complementary colors to blue) by use of wavelength conversion. The optical lens can have a recessed light incident surface having an opening, a light emitting surface, and a totally reflective surface positioned between the light incident surface and the light emitting surface. The inner bottom of the recessed light incident surface can include a convex shape having a convex surface. The light emitting surface can be composed of a convex portion having a center and a periphery that can be formed in different shapes or curvatures, and can include a flat surface surrounding the convex portion.

The present invention is directed to an electro-magnetophoresis display having either the traditional up / down or dual switching mode. The display cells are filled with an electro-magnetophoretic dispersion comprising particles suspended in a solvent and the particles are both charged and magnetized.The display of the invention prevents undesired movement of the particles in the cells. The magnetic force generated by the magnetic layer(s) eliminates the need to provide cells with a threshold voltage high enough to avoid the cross talk and / or cross bias effects. In addition, the dual switching mode allows the particles to move in the up / down direction as well as the planar direction, thus providing a multicolor display of high color quality at very low cost.