Patent application number | Description | Published |
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 |
20120056225 | LIGHT EMITTING DEVICE - A light emitting device according to one embodiment includes a board; a light emitting element mounted on the board, emitting light having a wavelength of 250 nm to 500 nm; a red fluorescent layer formed on the element, including a red phosphor expressed by equation (1), having a semicircular shape with a diameter r; | 03-08-2012 |
20120056525 | LIGHT EMITTING DEVICE - A light emitting device according to one embodiment includes a light emitting element that emits light having a wavelength of 250 nm to 500 nm; plural red fluorescent layers that are formed above the light emitting element to include a red fluorescent material, the red fluorescent layers being disposed at predetermined intervals; and plural green fluorescent layers that are formed above the light emitting element to include a green fluorescent material, a distance between the light emitting element and the green fluorescent layers being larger than a distance between the light emitting element and the red fluorescent layers. | 03-08-2012 |
20120056527 | LIGHT EMITTING DEVICE - A light emitting device according to one embodiment includes a board; a light emitting element mounted on the board, emitting light having a wavelength of 250 nm to 500 nm; a red fluorescent layer formed on the element, including a red phosphor expressed by equation (1), having a semicircular shape with a diameter r; | 03-08-2012 |
20120228653 | LIGHT EMITTING DEVICE - A light emitting device of embodiments is provided with a light-emitting element emitting excitation light of a first wavelength, a first phosphor layer containing a first phosphor that converts the excitation light into first converted light of a second wavelength longer than the first wavelength, a second phosphor layer provided between the light-emitting element and the first phosphor layer, receiving the excitation light, and containing a second phosphor that converts the excitation light into second converted light of a third wavelength longer than the second wavelength, and a filter layer provided between the first phosphor layer and the second phosphor layer and constituted of a two-dimensional photonic crystal or a three-dimensional photonic crystal that transmits the excitation light and the second converted light and reflects the first converted light. | 09-13-2012 |
20130044473 | LIGHT EMITTING DEVICE - A light emitting device according to embodiments has: a substrate; first light emitting units arranged along a first straight line on the substrate; second light emitting units arranged along a second straight line on the substrate, the second straight line being parallel to the first straight line, the second light emitting units having an emission color different from the first light emitting units; and third light emitting units arranged along a third straight line on the substrate, the third straight line being parallel to the first and second straight lines, the third light emitting units having an emission color different from the first and second light emitting units, wherein a distance between light emitting units of a same emission color is longer than a minimum distance between light emitting units of different emission colors. | 02-21-2013 |
20130234584 | WHITE LIGHT EMITTING DEVICE - A white light emitting device according to an embodiment includes: a light emitting element having a peak wavelength in a wavelength range of 430 nm or more and 470 nm or less; a first fluorescent material emits light with a first peak wavelength of 525 nm or more and 560 nm or less; a second fluorescent material emits light with a second peak wavelength longer than the first peak wavelength; and a third fluorescent material emits light with a third peak wavelength of 620 nm or more and 750 nm or less, which is longer than the second peak wavelength. The first fluorescent material and the second fluorescent material has a composition of MSi | 09-12-2013 |
20130234591 | WHITE LIGHT EMITTING DEVICE - A white light emitting device of an embodiment includes: a light emitting element having a peak wavelength in a wavelength range from 430 to 470 nm both inclusive, a first fluorescent material formed over the light emitting element, and emitting light having a first peak wavelength of 530 to 580 nm both inclusive and having a first half width, and a second fluorescent material formed over the light emitting element, and emitting light having a second peak wavelength that is longer than the first peak wavelength and ranges from 570 to 620 nm both inclusive, and having a second half width that is 100 nm or less and is equal to or narrower than the first half width. | 09-12-2013 |
20130241396 | WHITE LIGHT EMITTING DEVICE - A white light emitting device includes a light emitting element having a peak wavelength at from 430 nm to 460 nm; and a fluorescent layer on the light emitting element containing a red fluorescent material and a green-yellow fluorescent material. The white light emitting device achieves high color rendering properties, a high average color rendering index Ra and a high luminescent efficiency, or a high white efficiency. | 09-19-2013 |
20140252391 | LIGHT-EMITTING DEVICE - A light-emitting device of an embodiment includes a light-emitting element emitting blue excitation light and a first phosphor excited by the blue excitation light and emitting fluorescence. A peak wavelength of the fluorescence is not shorter than 520 nm and shorter than 660 nm and the peak wavelength of the fluorescence shifting in the same direction when a peak wavelength of the blue excitation light shifts. The first phosphor is one of a yellow phosphor emitting yellow fluorescence, a green phosphor emitting green fluorescence, a yellow-green/yellow phosphor emitting yellow-green/yellow fluorescence and a red phosphor emitting red fluorescence. | 09-11-2014 |
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 |
20140287234 | FLUORESCENT SUBSTANCE AND METHOD FOR PRODUCING THE SAME - The present embodiments provide a yellow light-emitting fluorescent substance of high luminous efficiency and also a production method thereof. This substance is represented by the formula (1): | 09-25-2014 |