Patent application number | Description | Published |
20080238298 | IMAGE DISPLAY DEVICE - An image display device is provided, which includes a first substrate having a cold-cathode electron-emission element which emits electrons, and a second substrate which is spaced from and opposed to the first substrate. The second substrate has a transparent substrate, a light-emitting layer provided on the transparent substrate and including phosphor particles containing zinc sulfide as a base material, a boron nitride film disposed on a surface of the light-emitting layer, and an anode applying a voltage to the light-emitting layer. | 10-02-2008 |
20090072195 | LUMINESCENT MATERIAL - A luminescent material is provided, which includes a carbide oxynitride-based compound having a composition represented by formula 1: | 03-19-2009 |
20090189514 | LUMINESCENT MATERIAL - A lithium calcium silicate luminescent material is provided, which includes a tetragonal crystal phase containing Li, Ca, Si and O, and an activator containing Eu. The luminescent material exhibits a peak wavelength of emission spectrum falling within a wavelength region of 470 to 490 nm when excited by light having an emission peak falling within a wavelength region of 360 to 460 nm. | 07-30-2009 |
20090321771 | SEMICONDUCTOR LIGHT-EMITTING DEVICE - A semiconductor light-emitting device includes a semiconductor light-emitting element emitting light in a region ranging from ultraviolet to visible, and a visible-light luminescent element absorbing light emitted from the semiconductor light-emitting element and outputting visible light. The visible-light luminescent element includes a substrate, a light-reflecting layer formed on the substrate and containing light scattering particles, and a luminescent layer containing phosphor particles. The luminescent layer absorbs light emitted from the semiconductor light-emitting element and output visible light. The luminescent layer further absorbs light that is emitted from the semiconductor light-emitting element, arrives at and is reflected from the light scattering particles, and output the visible light. | 12-31-2009 |
20100102707 | RED FLUORESCENT SUBSTANCE AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The present invention provides a red fluorescent substance and a light-emitting device utilizing the substance. This device less suffers from color drift even when working with high power. The light-emitting device comprises a blue LED, a green fluorescent substance of Sr | 04-29-2010 |
20110050089 | PHOSPHOR AND IMAGE DISPLAYING DEVICE EMPLOYING THE SAME - The present invention provides a red-emitting phosphor emitting luminescence of excellent color purity with high efficiency under the excitation with near UV light, and it also provides a color image displaying device employing that phosphor. This phosphor comprises an ARS | 03-03-2011 |
20110204769 | FLUORESCENT MATERIAL AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The embodiment provides a process for production of a green light-emitting oxynitride fluorescent material having Sr | 08-25-2011 |
20110220919 | FLUORESCENT SUBSTANCE, PROCESS FOR PRODUCTION OF FLUORESCENT SUBSTANCE, LIGHT-EMITTING DEVICE AND LIGHT-EMITTING MODULE - The embodiment provides a process for production of an oxynitride fluorescent substance. An compound containing In or Ga is adopted in the process as a material thereof. The red fluorescent substance produced by the process can be combined with a semiconductor light-emitting element, so as to be used in a light-emitting device or a light-emitting module. | 09-15-2011 |
20120008647 | LIGHT EMITTING DEVICE - Disclosed is a white light emitting device including a semiconductor light emitting element configured to emit near ultraviolet light having a peak wavelength ranging from 380 to 410 nm, a first phosphor layer and a second phosphor layer. The first phosphor layer contains a blue-emitting phosphor configured to emit blue light by the near ultraviolet light, and a red-emitting phosphor activated by trivalent europium and configured to emit red light by the near ultraviolet light. The second phosphor layer contains a green-emitting phosphor configured to emit green light by the near ultraviolet light. The semiconductor light emitting element, the first phosphor layer and the second phosphor layer are laminated in this order to emit white light. | 01-12-2012 |
20120037849 | PROCESS FOR PRODUCING FLUORESCENT SUBSTANCE AND FLUORESCENT SUBSTANCE PRODUCED THEREBY - The present invention provides a fluorescent substance excellent both in quantum efficiency and in temperature characteristics, and also provides a process for producing the fluorescent substance. This fluorescent substance is an oxynitride phosphor having a low paramagnetic defect density and comprising aluminum, silicon, either or both of oxygen and nitrogen, and a metal element M, provided that the metal element M is partly replaced with an emission center element R. That phosphor can be produced by the steps of: subjecting a mixture of starting materials to heat treatment under a nitrogen atmosphere so as to obtain an intermediate fired product, and then further subjecting the intermediate fired product to heat treatment under an atmosphere of nitrogen-hydrogen mixed gas. | 02-16-2012 |
20120062103 | RED LIGHT-EMITTING FLUORESCENT SUBSTANCE AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The embodiment provides a red light-emitting fluorescent substance represented by the following formula (1): | 03-15-2012 |
20120062106 | RED LIGHT-EMITTING FLOURESCENT SUBSTANCE AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The embodiment provides a red light-emitting fluorescent substance represented by the following formula (1): | 03-15-2012 |
20130050980 | LUMINESCENT MATERIAL - According to one embodiment, the luminescent material emits light with an emission peak within a wavelength range of 490 to 580 nm when excited with light having a wavelength range of 250 to 500 nm and includes a particle containing a Sr | 02-28-2013 |
20130214305 | RED LIGHT-EMITTING FLUORESCENT SUBSTANCE AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The embodiment provides a red light-emitting fluorescent substance represented by the following formula (1): | 08-22-2013 |
20130229106 | LUMINESCENT MATERIAL - According to one embodiment, the luminescent material emits light having an luminescence peak within a wavelength range of 550 to 590 nm when excited with light having an emission peak in a wavelength range of 250 to 520 nm. The luminescent material has a composition represented by the following formula 1. | 09-05-2013 |
20130234585 | LUMINESCENT MATERIAL - According to one embodiment, the luminescent material shows a luminescence peak in a wavelength range of 570 to 670 nm when excited with light having an emission peak in a wavelength range of 250 to 520 nm. The luminescent material includes a host material having a crystal structure substantially same as the crystal structure of Sr | 09-12-2013 |
20130241395 | PHOSPHORS AND METHOD FOR PRODUCING THEREOF - The present embodiments provide a europium-activated oxynitride phosphor and a production method thereof. This phosphor emits red luminescence having a peak at 630 nm or longer and can be produced by use of inexpensive oxides as raw materials containing alkaline earth metals such as strontium. The oxynitride phosphor is activated by a divalent europium and represented by the formula (1): | 09-19-2013 |
20130293092 | FLUORESCENT MATERIAL AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The embodiment provides a process for production of a green light-emitting oxynitride fluorescent material having Sr | 11-07-2013 |
20140054500 | PROCESS FOR PRODUCTION OF FLUORESCENT SUBSTANCE - The embodiment provides a process for production of an oxynitride fluorescent substance. In the process, a compound represented by the formula: (Sr,Eu) | 02-27-2014 |
20140084782 | FLUORESCENT SUBSTANCE, LIGHT-EMITTING DEVICE AND METHOD FORPRODUCING FLUORESCENT SUBSTANCE - The fluorescent substance according to the present disclosure emits luminescence with a peak in the wavelength range of 500 to 600 nm under excitation by light with a peak in the wavelength range of 250 to 500 nm, and has an optical absorption coefficient α | 03-27-2014 |
20140092600 | LUMINESCENT MATERIAL - According to one embodiment, the luminescent material exhibits a luminescence peak in a wavelength ranging from 490 to 580 nm when excited with light having an emission peak in a wavelength ranging from 250 to 500 nm. The luminescent material has a diffraction peak intensity of the largest peak detected at 2θ=30.1-31.1° that is higher than the diffraction peak intensity of the peak detected at 2θ=25.0-26.0° in X-ray diffraction by the Bragg-Brendano method using Cu-Kα line and its composition is represented by (Sr | 04-03-2014 |
20140175971 | WHITE LIGHT-EMITTING DEVICE - The embodiment of the present disclosure provides a light-emitting device capable of both realizing neutral white color and having high luminous efficiency. The device has a blue-light emitting semi-conductor element and a luminescent layer containing a mixture of fluorescent substances. The mixture contains first and second phosphors. The first phosphor is activated with Ce and emits luminescence with a peak wavelength of 540 to 560 nm, and the second phosphor emits luminescence with a peak wavelength of 580 to 610 nm and is represented by the following formula (2): | 06-26-2014 |
20140264169 | RED LIGHT-EMITTING FLUORESCENT SUBSTANCE AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The embodiment provides a red light-emitting fluorescent substance represented by the following formula (1): | 09-18-2014 |
20140265819 | PHOSPHOR AND LIGHT-EMITTING DEVICE EMPLOYING THE SAME - The embodiment of the present disclosure provides a phosphor having such high luminous efficiency as to be capable of realizing a light-emitting device suffering less from color drift even when working with high power. This phosphor is a Ce-activated phosphor having a crystal structure of Sr | 09-18-2014 |