Patent application number | Description | Published |
20080265761 | LIGHT EMITTING DEVICE HAVING DOPANTS IN A LIGHT EMITTING LAYER - A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. The first and second dopants are metal organic complex compounds having the same ligand skeletal structures. | 10-30-2008 |
20080265762 | LIGHT EMITTING DEVICE HAVING DOPANTS IN A LIGHT EMITTING LAYER - In order to improve the light emission efficiency and the light emission life time of an organic electroluminescent device, the invention provides a method for improving the dispersibility of a light emitting material in the light emitting layer. The light emitting device comprises electrodes consisting of an anode and a cathode provided on a substrate, and an organic light emitting layer between the electrodes, wherein the organic light emitting layer includes a light emitting material and a dopant for improving the dispersibility thereof. As the dopant, there are employed a light emitting compound and a non-light emitting compound or a current enhancing material. In case of employing the light emitting compound, the composition corresponds to a case of utilizing plural light emitting materials, and, in such case, the light emission wavelengths are preferably mutually closer. Also evaporation of the light emitting material and the dopant in a same evaporation boat allows to reduce the evaporation temperature, to improve the dispersibility of the light emitting material and to improve the device characteristics. In this manner there can be obtained a light emitting device of a high light emission efficiency and a long light emission life. | 10-30-2008 |
20080265763 | LIGHT EMITTING DEVICE HAVING DOPANTS IN A LIGHT EMITTING LAYER - A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. As the first dopant, there is employed a phosphorescent dopant. The amount of the second dopant is greater than the amount of the first dopant. | 10-30-2008 |
20110089821 | LIGHT EMITTING DEVICE HAVING DOPANTS IN A LIGHT EMITTING LAYER - A light emitting device comprises a pair of electrodes and an organic light emitting layer between the electrodes. The organic light emitting layer includes a host material, a first phosphorescent dopant, and a second dopant different from the first phosphorescent dopant. The amount of the second dopant is greater than the amount of the first dopant in the organic light emitting layer. The host material, the first phosphorescent dopant and the second dopant are mixed throughout the organic light emitting layer. | 04-21-2011 |
Patent application number | Description | Published |
20090184634 | LUMINESCENCE DEVICE AND DISPLAY APPARATUS - A metal coordination compound represented by any one of formulas (1)-(5). An organic luminescence device including an anode, a cathode, and an organic layer, which contains the metal coordination compound, disposed between the anode and the cathode. | 07-23-2009 |
20100181898 | ORGANIC ELECTROLUMINESCENCE DEVICE AND LIGHT EMITTING APPARATUS - There is provided an organic electroluminescence device includes: a pair of electrodes formed of an anode and a cathode; and an organic compound layer provided between the pair of electrodes, in which the organic electroluminescence device contains a cesium suboxide in which an element ratio A/B calculated from an area ratio of a peak A at a binding energy of 726.0 eV±0.5 eV corresponding to a Cs3d5 orbital measured by X-ray photoelectron spectroscopy to a peak B at binding energy of 531.0 eV±0.5 eV corresponding to an O1s orbital measured by the X-ray photoelectron spectroscopy is in a range of 3.1 to 7.3. The organic electroluminescence device has excellent light emitting property that is not largely impaired even after the device is driven for a long time period. | 07-22-2010 |
20120007065 | ORGANIC EL ELEMENT ARRAY - An organic EL element array is provided which can more easily be produced with a high aperture ratio and a high definition and in which light-emitting layers of organic EL elements adjacent to each other in an interpixel region mutually overlap in the interpixel region. | 01-12-2012 |
20120009333 | ORGANIC EL ELEMENT ARRAY - An organic EL element array is provided which can more easily be produced with a high aperture ratio and a high definition and in which light-emitting layers of organic EL elements adjacent to each other in an interpixel region mutually overlap in the interpixel region. | 01-12-2012 |
20140042928 | LIGHT-EMITTING DEVICE - A light-emitting device includes a plurality of organic EL elements including first electrodes, a second electrode, and organic compound layers therebetween, pixel circuits connected to the corresponding first electrodes, and a common power supply connected to the second electrode, in which at least a part of the organic compound layers is formed to extend from over the plurality of first electrodes to gap areas between the first electrodes, and a resistance between two adjacent first electrodes is less than a resistance between one of the first electrodes and the second electrode. Each of the organic EL elements receives an intermittent supply of a current from the corresponding pixel circuit, and during a period in which the current is stopped, a voltage equal to or less than a light emission threshold value is applied to the organic EL element. | 02-13-2014 |
20150076478 | LUMINESCENCE DEVICE AND DISPLAY APPARATUS - A metal coordination compound represented by any one of formulas (1)-(5). An organic luminescence device including an anode, a cathode, and an organic layer, which contains the metal coordination compound, disposed between the anode and the cathode. | 03-19-2015 |
Patent application number | Description | Published |
20090284450 | LIGHT-EMITTING APPARATUS - When the degradation of a light-emitting device is detected and the luminance is compensated, because the lowering in current efficiency involved in the degradation varies for each luminance, use of the same compensation coefficient provides a luminance region in which the compensation is insufficient. A light-emitting apparatus includes a light-emitting device; a control unit for changing a display luminance of the light-emitting device depending on an input signal; a degradation detection unit for detecting a degradation amount of the light-emitting device; and a correction unit for correcting the input signal depending on a detected degradation amount, wherein the correction unit corrects the input signal depending on the degradation amount of the light-emitting device and the display luminance determined by the input signal. | 11-19-2009 |
20090284452 | DISPLAY APPARATUS - A display apparatus includes: a light-emitting device which is provided for each pixel and includes terminals; a drive portion for supplying a drive current to the light-emitting device; a voltage detection portion for detecting a voltage increase between the terminals of the light-emitting device; a correction portion for correcting the drive current for the light-emitting device; and a control portion for controlling the drive portion to supply the corrected drive current from the drive portion to the light-emitting device. The correction portion performs, for a pixel in which the detected voltage increase reaches a reference value, a correction to increase the drive current at a predetermined ratio. | 11-19-2009 |
20130082909 | DISPLAY APPARATUS - A display apparatus includes a plurality of subpixels having different emission colors in a pixel, and each of the subpixels includes an organic EL device. A high-refractive-index transparent layer having a refractive index higher than that of an organic compound layer of the organic EL device is provided on a light exit side of the organic EL device, and further, a light extraction structure is arranged on an outer circumference of the subpixel on the light exit side of the high-refractive-index transparent layer. A distance between first electrodes of the subpixels closest to each other, which are respectively included in the two adjacent pixels, is set to be larger than that between the first electrodes of the two adjacent subpixels within the pixel. | 04-04-2013 |
20130234120 | LIGHT-EMITTING APPARATUS - Provided is a light-emitting apparatus which, without using an insulating film for separating pixels, inhibits leakage current between adjacent pixels and which accommodates higher resolution. By providing a groove in an insulating layer along an edge of a first electrode, the thickness of a first charge transport layer is reduced to inhibit leakage current between adjacent pixels. | 09-12-2013 |