966 results about "High luminance" patented technology

An organometallic complex and an organic light-emitting element containing the complex which has a very high efficiency, a high luminance, and durability. The organic light-emitting element has an anode, a cathode, and a layer including an organic compound sandwiched between the anode and cathode. The layer containing the organic compound includes at least one organometallic complex represented by General Formula [I] below.

A luminescence device having a layer containing a metal coordination compound which has a partial structure MLm of formula (2) below and is preferably entirely represented by formula (3) below:MLmL'n (3),wherein M denotes a metal atom of Ir, Pt, Rh or Pd; represent mutually different bidentate ligands; m is 1 or 2 or 3; n is 0 or 1 or 2 with the proviso that m+n=2 or 3; the partial structure MLm is represented by formula (2) below (wherein B is an isoquinolyl group bonded to the metal M with its N and including a position-1 carbon atom bonded to a cyclic group A which includes the C bonded to the metal M), and the partial structure ML'n is represented by formula (4), (5) or (6) shown below. There is provided a luminescence device capable of high-efficiency luminescence and long-term high luminance and adapted to red luminescence.

Provided are red phosphorescent compounds represented by Formula 1:

Organic electroluminescent devices using the red phosphorescent compounds are further provided. The organic electroluminescent devices exhibit good red color purity, high quantum efficiency, high power efficiency, high luminance, and long lifetime.

A light-emitting device is provided which uses an organic compound to emit light with high luminance and extremely high efficiency. The organic compound is composed of a metal complex having monovalent bidentate ligands. The light-emitting device includes a pair of electrodes which are an anode and a cathode, and plural organic compound layers interposed between the electrodes, in which at least one layer of the organic compound layers contains a metal complex represented by the following structural formula. The light-emitting device is an organic electroluminescent device using the light-emitting device in which the layer including the organic compound is a light-emitting layer.

A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (G0). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (G0), Ar¹ and Ar² each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar³ represents a substituent including a carbazole skeleton.

An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below:MLmL'n (1),wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L' are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML'n is represented by formula (3) or (4) shown below: The metal coordination compound of the formula (1) is characterized by having at least one aromatic substituent for at least one of CyN1, CyN2, CyC1 and CyC2. The metal coordination compound having the aromatic substituent is effective in providing high-efficiency luminescence, long-term high luminance, and less deterioration by current passing.

One or more reflectance modifying agent (RMA) such as a pigmented cosmetic agent is applied selectively and precisely with a controlled spray to human skin according to local skin reflectance or texture attributes. One embodiment uses digital control based on the analysis of a camera images. Another embodiment, utilizes a calibrated scanning device comprising a plurality of LEDs and photodiode sensors to correct reflectance readings to compensate for device distance and orientation relative to the skin. Ranges of desired RMA application parameters of high luminance RMA, selectively applied to middle spatial frequency features, at low opacity or application density are each be significantly different from conventional cosmetic practice. The ranges are complementary and the use of all three techniques in combination provides a surprisingly effective result which preserves natural beauty while applying a minimum amount of cosmetic agent.

An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below: MLmL'n (1), wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L' are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML'n is represented by formula (3) or (4) shown below: at least one of the optional substituent(s) of the cyclic groups, and the cyclic groups CyC1 and CyC2 include an aromatic group capable of having a substituent represented by the following formula (5): The metal coordination compound having the aromatic group is effective in providing high-efficiency luminescence and long-term high luminance.

The invention realizes a phosphor film that has a fluorescent characteristic excellent in resistance to humidity and provides, using the phosphor film, a liquid crystal display device that is excellent in resistance to humidity and has satisfactory calorimetric property and color mixture property. Phosphor particles that are excited by incident light and emit light having a wavelength different from the incident light are mixed in a binder. The binder mixed with the phosphor particles is sandwiched between a translucent film and a non-permeable layer as a phosphor layer to form a phosphor film. This phosphor film is provided at least in one place among a place between a light source and a light guide of a lighting device, a place on a light irradiation surface of the light guide, and a place between the light guide and a reflection plate. Moreover, the phosphor particles have a characteristic that a wavelength absorbed by a color filter of a display element is set as an excitation wavelength and a luminescent wavelength is in a region transmitted by the color filter. With this phosphor film, it is possible to realize a display device that has extremely high luminance efficiency and color reproducibility.

Disclosed herein is a package structure including at least one high power light-emitting diode to exhibit excellent heat release properties. In the package structure, a light-emitting diode chip which generates heat is directly attached to a beacon processed to protrude from part of a heat spreader having high heat conductivity, whereby an electrical wiring portion is separated from a heat release portion, thus maximizing heat release properties and realizing high luminance and reliability. The package structure is composed of a beacon formed on a metal or non-metal substrate having high heat conductivity to mount a high power light-emitting diode chip, to increase heat release properties; a wiring portion provided on the same line as the diode to input and output power and signals; and a reflection cup having a cavity, which may be inserted into or attached to the heat spreader or the wiring substrate, including a low temperature co-fired ceramic substrate, a high temperature co-fired ceramic substrate, or a printed circuit board.

An surface light emitting device that is capable of emitting light of high luminance with higher uniformity is disclosed.The surface light emitting device comprising; a light guide plate, a reflector on the under surface of the light guide plate and, an LED light source having at least one LED element and provided so that a light emitted by the LED element is incident on at least one end face of the light guide plate, wherein the light guide plate has a light diffusing portion on the one end face so that a light emitted from the LED light source enters the light guide plate while being diffused therein, and the light diffusing portion has the top end being space from the top surface.

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.

An LCD provided with an edge light type back light unit which is arranged in a manner that the light emitted from a CCT in the form of a linear light source is condensed at the end portion of a light conduction plate, then the light reflected by a reflecting sheet and then ejected from the light conduction plate transmits through a light diffusion plate thereby to indirectly irradiate on a liquid crystal panel from the rear direction thereof in the form of planar light with uniform luminance. A light reflecting plate having a curved surface is disposed in the vicinity of the CCT. A light shielding plate is disposed in a manner that a part of the light emitted from the CCT and reflected by the light reflecting plate is condensed at the end portion of the light conduction plate. Another part of the light emitted from the CCT and reflected by the light reflecting plate is directed upward and directly irradiates a part of the display area of the liquid crystal panel thereby to form a high luminance irradiation portion. Accordingly, thus configured LCD is improved in its visibility and so can be formed as a vehicle-mounted alarm display device for displaying various alarms.

In the gas discharge tube according to the present invention, there is carried out narrowing of the discharge path with cooperation of the first opening 20 and the second opening 12 in order to obtain higher luminance of light. Further, in order to maintain excellent starting-properties of a lamp even if the discharge path is narrowed, a predetermined voltage is applied to a second discharge path limit portion 11 externally. Thereby, a positive or active starting discharge is produced in such a manner as to pass through the first opening 20. Further, the second opening 12 is comprised of not only a straight section 13 extending in a direction of an optical axis Y, but also a spread section 14 extending from an end portion of the straight section 13 toward the first opening 20. The spread section 14 has a function of improving the starting properties of the lamp and forms an arc ball, and the straight section has a function of improving a plasma density. Thereby, discharge at a starting time is made easy to pass through the second discharge path limit portion 11. As a result, a rapid start of discharge between a cathode 23 and an anode portion 8 is achieved in the second discharge path limit portion 11, and that contributes to proper generation of an arc ball after lighting.

In one embodiment of the present invention, a display device is disclosed wherein if a frame luminance is less than a maximum value, the device creates a difference between luminance outputs in the two subframes and sets the luminance difference to a value less than a sub-maximum luminance which is a maximum luminance output in one subframe. With the arrangement, no complete switching of the subframes in which luminance outputs are made occurs at a grayscale level where low luminance replaces high luminance or vice versa. Thus, the grayscale level-luminance curve continues smoothly.

An image pickup apparatus capable of performing dynamic assignment of an output image in a dynamic range according to a subject.

The image pickup apparatus includes an image pickup device (131) for picking up an image of a subject, a signal processing section (133) for generating a composite image having a relatively wider dynamic range than at least either of the dynamic ranges of a long-time exposure image picked up with a relatively long exposure time by the image pickup device and a short-time exposure image picked up with a relatively short exposure time by the image pickup device, by synthesizing the long-time exposure image and the short-time exposure image, and a control section (137) for compressing the composite image and dynamically varies the assignment proportion of a high luminance dynamic range to a low-middle luminance dynamic range in a dynamic range of an output image to be outputted as a video signal.

A semiconductor light emitting device can be configured to maintain high luminance and to suppress the possibility of the occurrence of wire breakage with high quality and reliability. A method for producing such a semiconductor light emitting device with a high process yield is also disclosed. The semiconductor light emitting device can include a sealing member into which a reflective filler can be mixed in such an amount (concentration) range that luminous flux with a predetermined amount can be maintained and the possibility of the occurrence of wire breakage can be lowered. Various sealing members containing a reflective filler with a plurality of concentrations within this range can be prepared in advance. By taking advantage of the phenomenon where chromaticity shifts depending on the concentration of the reflective filler, a semiconductor light emitting device with less chromaticity variation can be produced utilizing a sealing member with a particular concentration in accordance with the chromaticity of a particular semiconductor light emitting element that is used and which may be varied during fabrication.

A color display device is disclosed, comprising: an array of subpixels of three different colors, including subpixels of a relatively high luminance first color and subpixels of relatively lower luminance second and third colors, wherein the subpixels are arranged into rows or columns to form a repeating pattern of alternating lower luminance and high luminance color subpixels in each row or column, with the sequential order of the two lower luminance color subpixels being alternated within each row or column, and wherein the alignment of subpixels of the same colors in adjacent rows or columns is such that the high luminance color subpixels are aligned more closely to perpendicular than are each of the lower luminance color subpixels relative to the direction of the rows or columns in which the subpixels are arranged in a repeating pattern.

The information processing apparatus equipped with a liquid crystal display apparatus that is usable in the face-to-face usage style. When the display direction is switched into the facing direction and in a normal usage state, the liquid crystal display apparatus exhibits an excellent visual recognizability and complicated operations are unnecessary. The image information, the picture direction of which has been inverted upside down, is outputted from the information processing unit 2 to the display unit 1 in such a manner as to be coupled with the picture direction change instructing member 3. At the same time, the luminance information at the time of the picture upside-down inversion, which has been set in advance into the luminance adjusting member 4, is supplied to the display unit 1 so as to change the luminance simultaneously with the picture inversion. At this time, the luminance of the display unit 1 at the time of the picture upside-down inversion is changed to a higher luminance, thereby making it possible to enhance the visual recognizability from the facing side.

Disclosed is an LCD having an adaptive luminance intensifying function and driving method thereof. A timing controller checks features of externally provided image data, and when they are found to be moving pictures, it determines a luminance level required from the image data and outputs a luminance level control signal, and when they are found to be still images, outputs a predetermined luminance signal. A backlight driver outputs a high-potential backlight driving voltage to the backlight unit when a luminance control signal of high-luminance level driving is provided by the timing controller, and outputs a constant level luminance signal when a constant luminance signal is input. As a result, by selecting a plurality of portions of the displayed screen and tracking and monitoring the changes of the image data, features of the images are defined and application conditions of the luminance intensifying function are determined to control the luminance level of the backlight and outputs of gamma voltage levels. Accordingly, the contrast of a display screen is improved and the power consumption is

An active matrix LED display apparatus and a fabrication method thereof are provided. The active matrix LED display apparatus enables to miniaturize pixel by a formation of wiring on bottom layer and an assembly of each block through each eutectic layer into each transistor block receptor and/or each LED block receptor formed according to each color element unit, and to be embodied with high luminance, low power consumption, high reliability and superior optical property by assembling a transistor block having high electron mobility. And the fabricating method of the present invention enables to make efficiently an AM-LED display apparatus at room temperature in a short time by using different shapes of receptor and block depending on the function of a transistor and/or on the color of an LED.

A phosphor, which has less reduction in emission efficiency and is capable of keeping high luminance even when density of an electron beam for exciting the phosphor increases, is provided. As raw materials, Ca₃N₂ (2N), AlN (3N), Si₃N₄ (3N), and Eu₂O₃ (3N) are prepared, and each of the raw materials is weighed so that a mole ratio of each element is, for example, (Ca+Eu):Al:Si=1:1:1, and mixed, then the mixture is held and fired at 1500° C. under the inert atmosphere for three hours, and thereafter ground to produce a phosphor having a composition formula of Ca_0.985SiAlN₃:Eu_0.015

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.

There is provided an aminoanthryl derivative-substituted pyrene compound represented by the following general formula (1).

The compound is useful as a compound for an organic light-emitting device exhibiting highly pure luminescent color, and an optical output with high efficiency, high luminance, and long life.

A light source apparatus including light spectrum-converting materials that emit light primarily over large portions of the 360 nm-480 nm and the 590-860 nm spectral range is provided. This apparatus provides a cooled, high-luminance, high-efficiency light source that can provide a broader spectrum of light within these spectral ranges than has been cost-practical by using many different dominant peak emission LEDs. Up to 15% of the output radiant power may be in the spectral range 350-480 nm in one embodiment of this device, unless a specific separate source and lamp operating mode is provided for the violet and UV. Control methods for light exposure dose based on monitoring and controlling reflected or backscattered light from the illuminated surface and new heat management methods are also provided. This flexible or rigid light source may be designed into a wide range of sizes or shapes that can be adjusted to fit over or around portions of the bodies of humans or animals being treated, or mounted in such a way as to provide the special spectrum light to other materials or biological processes. This new light source can be designed to provide a cost-effective therapeutic light source for photodynamic therapy, intense pulsed light, for low light level therapy, diagnostics, medical and other biological applications as well as certain non-organic applications.

A linear light source device for image reading. The main body of the linear light source device includes at least a light-guide bar and a light source assembly. The light-guide bar is a polygonal column with one surface having stripes thereon, acting as a reflective plane with a reflective function. The opposite plane to the reflective plane is a light-exiting plane, and all the remaining planes are reflective layers. At least one of the ends of the polygonal column is an incident plane for a light beam to enter. Light is transmitted through both of the two ends of the polygonal column (or one end with the other end acting as a reflective plane) and uniformly transmits through the light-exiting plane. The light-guided bar has a simple structure and configuration, a compact volume, a high rate of utilization in light energy, is flexibly changed in length, and is easy to manufacture with high product yield and low manufacturing cost. In addition, it can provide uniform monochromatic and colored light, with high luminance, and at a low cost.

The present invention relates to a phosphor that satisfies requirements (1) to (3):

• • (1) the phosphor satisfies Formula [2] and/or Formula [3]:

85≦{R₄₅₅(125)/R₄₅₅(25)}×100<110  [2]

92≦{R₄₀₅(100)/R₄₀₅(25)}×100<110  [3]

wherein R₄₅₅(125) represents an emission peak intensity when the phosphor is excited by light having a peak wavelength of 455 nm at 125° C.,

• • (2) the emission peak wavelength is in the range of 570 nm to 680 nm, and
  • (3) the full width at half maximum of an emission peak is 90 nm or less.

The phosphor of the present invention has a high luminous efficiency and emits light of orange to red with high luminance. The use of the phosphor makes it possible to produce a light-emitting device, an illumination apparatus, and an image display, having a high efficiency and excellent color rendering properties.

Disclosed is a method for producing core-shell nanowires in which an insulating film is previously patterned to block the contacts between nanowire cores and nanowire shells. According to the method, core-shell nanowires whose density and position is controllable can be produced in a simple manner. Further disclosed are nanowires produced by the method and a nanowire device comprising the nanowires. The use of the nanowires leads to an increase in the light emitting/receiving area of the device. Therefore, the device exhibits high luminance/efficiency characteristics.

The present invention discloses a backlight including external electrode fluorescent lamps and a method for driving the backlight. The backlight includes fluorescent lamps having external electrodes made of an electrically conductive material for wrapping the outer peripheral surfaces including edge cross-sections on both ends of a glass tube with a layer of fluorescent substance applied thereon. The backlight is constructed in a manner that a plurality of such fluorescent lamps are installed at the outer portions of a plastic light guide, and an alternating current type power source is applied from the outside to the fluorescent lamps by installing a plurality of the fluorescent lamps between a reflecting plate and a diffusing plate and electrically connecting them with one another. The backlight of the present invention is driven by a square wave from a switching inverter, and is characterized by the use of an overshooting waveform and a self-discharge effect favorable to an initial discharge, thereby driving it using a low frequency of several dozen kHz and thus realizing high luminance and high efficiency.

The luminance of different colors of light emitted from EL elements in a pixel portion of a light emitting device is equalized and the luminance of light emitted from the EL elements is raised. The pixel portion of the light emitting device has EL elements whose EL layers contain triplet compounds and EL elements whose EL layers contain singlet compounds in combination. The luminance of light emitted from the plural EL elements is thus equalized. Furthermore, a hole transporting layer has a laminate structure to thereby cause the EL elements to emit light of higher luminance.