Abstract: It is an object of the present invention to provide an organic light emitting device having a long-life optical output. The organic light emitting device according to the present invention is provided with an emission layer including at least a host material, a light emitting material, and another material, wherein the another material has a smaller ionization potential than and almost the same hole mobility as or a greater hole mobility than an ionization potential and a hole mobility of a compound which forms an emission layer-side-interface.

Abstract: There is provided a display device which quenches ambient light by using only an optical interference effect without additionally using an optical filter such as a color filter, and can provide good visibility out of doors in the daylight. The display device includes a plurality of organic EL elements each having a light extraction electrode, a reflective electrode, and a plurality of organic compound layers disposed between the electrodes, wherein the plurality of organic EL elements include at least organic EL elements which emit a red light, a green light, and a blue light, respectively; a layer comprised of a material having anomalous dispersion is disposed at a location which is on a light extraction side with respect to the reflective electrode in each of the plurality of organic EL elements; and an ambient light reflectance of the display device shows a minimal in a region of 535 nm or more and 575 nm or less.

Abstract: An object of the present invention is to provide an organic blue-light-emitting device having high emission efficiency and a long continuous driving lifetime. The organic light-emitting device include a layer containing a first compound having a fluoranthene skeleton and a second compound having a pyrene skeleton, the second compound having an energy gap larger than that of the first compound, wherein EL1 representing the energy of the lowest unoccupied molecular orbit (LUMO) of the first compound and EL2 representing the energy of the LUMO of the second compound satisfy a relationship of EL2?EL1?0.15 eV.

Abstract: Provided is an organic electroluminescent device for emitting blue light, which has high luminous efficiency and good drive durability. This organic electroluminescent device for emitting blue light includes an anode 2, a cathode 6, and a layer which contains an organic compound interposed between the anode 2 and the cathode 6, the layer which contains an organic compound including at least a light-emitting layer 4, wherein the light-emitting layer 4 contains a bipolar host having a hole mobility and an electron mobility of 10?4 cm2/s or greater, a light-emitting dopant and a carrier trapping dopant, and the light-emitting dopant energy gap EgB, the bipolar host energy gap Egh, and the carrier trapping dopant energy gap Egd are such that Egd>Egh>EgB.

Abstract: Provided is an organic light emitting device capable of emitting light with high efficiency by incorporating a silyl compound in which a silyl group is directly bonded to an anthracene ring particularly into its light emitting layer.

Abstract: A method of preventing image degradation due to nonejecting nozzles of a recording head is provided for an inkjet recording apparatus for recording images by ejecting ink from plural nozzles disposed in the recording head. The method according to the present invention includes the steps of measuring and recording a pattern for checking an ejection state of the head, determining a nonejecting nozzle from the pattern, obtaining density distribution for each nozzle, and determining a complementary table for every nozzle from the density distribution in the nonejecting nozzle portion for performing different-color complementing.

Abstract: In an image area printed by a nozzle group including a defective nozzle, pixels printed by the defective nozzle and part of pixels located in the vicinity of the same are printed by another nozzle group. As a result, since printing is performed not only at the pixels printed by the defective nozzle but also at the pixels in the neighborhood thereof simultaneously by separate nozzles, irregularities of printing attributable to interpolation are distributed even when there is a relative misalignment between the nozzle groups. It is therefore possible to obtain a preferable image without any increase in output time even when a printing head including a defective nozzle is used.

Abstract: A secondary color is used for printing an image with a printer so as to reduce the granularity of the printed image, particularly the light image area. Data of magenta and cyan color components of image data is subjected to under-removal processing to generate blue ink image data as the mentioned secondary color. A blue ink dot is printed in accordance with the blue ink data obtained by the under removal processing to replace the magenta and cyan data. As a result, it is possible to reduce the granularity that would otherwise be caused by localized distributions of magenta and cyan dots.

Abstract: There is provided an organic electroluminescent display apparatus including a plurality of pixels constituting a display portion, each of the pixels includes sub-pixels of at least four colors, each of which includes an organic electroluminescent device having a pair of the electrodes and an organic compound layer formed between the pair of the electrodes, and the sub-pixels of at least four colors constitute a convex polygon containing a white color on CIE chromaticity coordinates, and includes the sub-pixels of two colors to be complementary colors with the white color interposed therebetween. In this case, the organic compound layers of the sub-pixels of two colors each contain a phosphorescent organic compound. The organic electroluminescent display apparatus can enlarge the color gamut and simultaneously can reduce the power consumption.

Abstract: Provided is an organic light-emitting device capable of emitting light with high efficiency by incorporating a silyl compound in which a silyl group and an amino group are directly bonded to an anthracene ring particularly into its light-emitting layer. In the organic light-emitting device including: a pair of electrodes composed of an anode and a cathode; and an organic compound layer interposed between the pair of electrodes, wherein the organic compound layer contains the following silyl compound. A layer containing at least one kind of the silyl compound is a light-emitting layer.

Abstract: Provided is an organic light emitting device capable of emitting light with high efficiency by incorporating a silyl compound in which a silyl group is directly bonded to an anthracene ring particularly into its light emitting layer. In the organic light emitting device including: a pair of electrodes formed of an anode and a cathode, at least one of which being transparent or semi-transparent; and one or more layers containing an organic compound layer interposed between the pair of electrodes, at least one of the layer containing the organic compound contains the following silyl compound, and a layer containing at least one kind of the silyl compound is a light emitting layer.

Abstract: The organic light-emitting device capable of emitting light with remarkably high efficiency and luminance by using a fluorene compound having substituents is provided, and at least one layer among the organic compound layers in the device contains a first compound and a second compound, and the first compound is a fluorene compound represented by the following general formula (III) and the second compound is a compound represented by the following general formula (IV).

Abstract: There is provided a display device which quenches ambient light by using only an optical interference effect without additionally using an optical filter such as a color filter, and can provide good visibility out of doors in the daylight. The display device includes a plurality of organic EL elements each having a light extraction electrode, a reflective electrode, and a plurality of organic compound layers disposed between the electrodes, wherein the plurality of organic EL elements include at least organic EL elements which emit a red light, a green light, and a blue light, respectively; a layer comprised of a material having anomalous dispersion is disposed at a location which is on a light extraction side with respect to the reflective electrode in each of the plurality of organic EL elements; and an ambient light reflectance of the display device shows a minimal in a region of 535 nm or more and 575 nm or less.

Abstract: There is provided a light-emitting element array having a plurality of light-emitting elements of different emission colors each comprising a light extraction electrode, a reflecting electrode, and an organic layer disposed between the electrodes, said organic layer comprising a light-emitting layer and a carrier-transporting layer disposed between the light-emitting layer and the reflecting electrode, wherein the geometrical distances between the reflecting electrode and light-emitting layer are the same irrespective of the emission color, and the specific relational equations (1), (2), and (3) are satisfied.

Abstract: A recording apparatus for forming a color image on the recording material. The recording apparatus includes a recording head having a plurality of recording elements; recording head driving units for driving the recording elements of the recording head in accordance with image data to form an image on the recording material; a plurality of supplementing units for effecting supplementations, in different manners, for supplementing defects in a recorded image resulting from a non-operating recording element of the recording elements; and control units for selectively operating the plurality of supplementing units depending on a record image to effect the supplementation.

Abstract: A recording system for recording a color image on a recording medium by utilizing a recording head, on which a plurality of recording elements are arranged, includes a compensation unit to compensate a position to be recorded by a recording element which does not execute a recording operation by color dots different from those of that recording element. The compensation unit is controlled such that the number of the compensation dots is less than the number of dots to be formed originally and that lightness per a determined area of an image obtained by the compensation dots is within a range of ±20% of that to be obtained by dots from the recording element which does not execute the recording operation. The recording system can minimize nonuniformity in the recorded image, can make the nonuniformity be unrecognized by human eyes and can suppress increased costs while increasing recording rates.

Abstract: When multilevel printing is performed by using a plurality of types of inks, which present different densities for similar colors when used for printing, and changing the types of inks and the numbers of ink droplets in printing each pixel, an ink distribution table which defines a combination of the types of inks and the numbers of ink droplets in correspondence with each gray level value is generated on the basis of input information associated with the relative densities of the respective inks. A combination to be used to print each pixel is selected on the basis of the ink distribution table, thereby printing a good grayscale image free from gray-level reversal and the like.

Abstract: The present invention provides a fluorene compound having a novel substituent, and the fluorene compound is represented by the following formula [1]:

Abstract: 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.

Abstract: An organic light-emitting device is provided which has an optical output with a high efficiency, a high luminance and a long life and which includes a pair of electrodes including an anode and a cathode, and at least one layer comprising an organic compound provided between the pair of electrodes, wherein at least one layer having a light-emitting region of the at least one layer comprising the organic compound comprises a first compound represented by the general formula (1): and a second compound having a bandgap larger than a bandgap of the first compound.