47results about How to "Narrow emission band" patented technology

The invention provides a lighting unit comprising a source of blue light, a source of green light, a first source of red light comprising a first red luminescent material, configured to provide red light with a broad band spectral light distribution, and a second source of red light comprising a second red luminescent material, configured to provide red light with a spectral light distribution comprising one or more red emission lines. Especially, the first red luminescent material comprises (Mg,Ca,Sr)AlSiN₃:Eu and/or (Ba,Sr,Ca)₂Si_5-xAl_xO_xN_8-x:Eu, and the second red luminescent material comprises K₂SiF₆:Mn.

An electroluminescence device has an anode, a cathode and an emitting layer located between the anode and the cathode. The emitting layer contains a compound selected from a group consisting of neutral red and its derivatives.

The invention provides a process for the production of a light converter comprising a siloxane polymer matrix with light converter nano particles embedded therein, the process comprising (a) mixing (i) light converter nano particles having an outer surface grafted with grafting ligands and (ii) curable siloxane polymers, and (b) curing the curable siloxane polymers, thereby producing the light converter; wherein the grafting ligands comprise siloxane grafting ligands having x1 Si backbone elements, wherein at least one Si backbone element of each siloxane grafting ligand comprises a side group having a grafting functionality; wherein the curable siloxane polymers have y1 Si backbone elements; and wherein x1 is at least 20, wherein y1 is at least 2, and wherein x1/y1≧0.8.

A method for synthesizing dyes excitable by a helium-neon laser (excitable at 633 nm) from hololepidines, e.g., 7-halolepidine, which dyes are suitable for detection and enumeration of reticulocytes in human blood samples. In another aspect, the invention provides a method for immunotyping phenocytes. The method is based on the phenomenon that when dyes of certain structure intercalate into DNA or RNA, the intensity of the dye increases. Dyes suitable for this invention can be described as having (a) a first heterocyclic moiety, (b) a second heterocyclic moiety, and (c) a linking group that connects the first and second heterocyclic moieties. Both the first and second heterocyclic moieties must contain at least two rings, preferably fused together. The dye is characterized by conjugation, whereby the first moiety is ethylenically conjugated to the second moiety.

The present invention discloses one kind of conjugated polymer containing oxidazole and with excellent electron injection and transmission capacity and its application as blue electroluminescence material in organic planar display device. The polymer has good dissolvability, heat stability, electronic transmission, color purity, etc.

The invention provides a lighting device (100) configured to generate lighting device light (101), wherein the lighting device light (101) includes an emission band (110) in the visible part of the spectrum which represents at least 80% of the total power (W) of the lighting device light (101) in the visible part of the spectrum, wherein the emission band (110) has a full width half maximum of at maximum 60 nm, and wherein the emission band (110) has a peak maximum (MM3), wherein said emission band (110) comprises luminescent material light (21), wherein the lighting device (100) comprises (i) a solid state-based light source (10), configured to generate light source light (11) having a peak maximum (MX2), and (ii) a luminescent material (20), configured to convert at least part of the light source light (11) into said luminescent material light (21), wherein the solid state-based light source (10) is configured to provide said light source light (11) with 0<MM3−MX2<60 nm.

The invention provides a lighting device (1) comprising (a) a light source (10) configured to generate light source light (11), and (b) a light converter (100) configured to convert at least part of the light source light (11) into visible converter light (111), wherein the light converter (100) comprises a matrix (120) containing an organic luminescent material (140) of the benzoxanthene derivative type. The lighting device may further comprise a further luminescent material (130).

The invention provides photochromic ink-jet printable water-based fluorescent ink and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving lanthanidemetal chloride and trimesic acid in a mixed solution of N,N-dimethyl formamide and deionized water, carrying out hydro-thermal treatment for 12-24 hours at the temperature of 80-120 DEG C, then cooling to the room temperature, separating, precipitating, and drying to obtain a lanthanide metal organic framework; step 2, activating the lanthanide metal organic framework in methanol, and grinding theactivated lanthanide metal organic framework and 1-(2-hydroxyethyl)-3,3-dimethyl indole-6-nitrobenzopyran in a nitrogen atmosphere to obtain a compound; and step 3, dispersing the compound in deionized water and absolute ethyl alcohol, adding a sodium dodecyl sulfate solution with a mass fraction of 10% to 12%, carrying out ball milling to obtain a second dispersion liquid, finally adding a polyvinyl alcohol or polyethylene glycol aqueous solution with a mass fraction of 3% to 5%, and uniformly mixing to obtain the photochromic ink-jet printing water-based fluorescent ink.

The invention provides a lighting device (1) comprising a plurality of light sources (100) configured to generate light source light (101), a plurality of light converter elements (200), wherein each light converter element (200) is radiationally coupled with one or more light sources (100), wherein the light sources (100) are configured at a non-zero distance from the light converter elements (200), wherein the light converter elements (200) are configured to convert at least part of the light source light into light converter light (201), the lighting device (1) further comprising a plurality of compound parabolic concentrators (300) configured in an array (310), each compound parabolic concentrator (300) having a first end (301) and a second end (302), and having a shape tapering from the first end (301) to the second end (302), wherein the light converter elements (200) are configured at the second ends (302) of the compound parabolic concentrators (300), wherein the light converter elements (200) and the compound parabolic concentrators (300) are configured to provide light converter light (201) emanating from the first ends (301) of the compound parabolic concentrators (300), and wherein the light converter elements (200) are in thermal contact with a heat sink (400).

The invention provides a lighting device (1) comprising (a) a light source (10) configured to generate light source light (11), and (b) a light converter (100) configured to convert at least part of the light source light (11) into visible converter light (111), wherein the light converter (100) comprises a matrix (120) containing a luminescent material (140) based on derivatives of benzimidazoxanthenoisoquinolinone. The lighting device may further comprise a further luminescent material (130).

The invention discloses a rare earth electroluminescent blue light device. The rare earth electroluminescent blue light device comprises a first functional layer, a light emitting layer and a second functional layer which are sequentially arranged from top to bottom, wherein the material of the light emitting layer is rare earth halide or a derivative thereof, the light emitting layer is of a non-doped type, and the transition mode of rare earth ions is f-d allowed transition. As the material is an inorganic material, the material is good in stability, not easy to age and long in service life,and has the property that the light-emitting peak position is adjustable by a crystal field, the crystal field of the material can be adjusted by changing the crystallinity of the material in the process of preparing the light emitting layer, and then the light-emitting peak position of rare earth ions in the material is adjusted so as to generate pure blue light. Furthermore, the material of thelight emitting layer has the light-emitting property of f-d allowed transition, so that the emission intensity is high, and the brightness is high. Due to the fact that the f-d non-doped rare earth compound 5d track contributes to the conduction band or valence band of the compound, large charge injection can be achieved, and blue light generated by the organic electroluminescent blue light device is enabled to have high external quantum efficiency and high brightness.

The invention provides photochromic fluorescent oily ink and a preparation method thereof. The method comprises the following steps: step 1, dissolving lanthanide series metal chloride and trimesic acid in a mixed solution of N,N-dimethyl formamide and deionized water, carrying out hydrothermal treatment for 12-24 h at the temperature of 80-120 DEG C, then cooling to the room temperature, carryingout separation and precipitation, and drying, thereby obtaining a lanthanide metal organic framework; step 2, activating the lanthanide metal organic framework in methanol, and grinding the activatedlanthanide metal organic framework and 1-(2-hydroxyethyl)-3,3-dimethyl indole-6-nitrobenzospiropyran in a mass ratio of 2: 1 in a nitrogen atmosphere for 30-60 minutes to obtain a compound; and step3, adding the compound and a sodium dodecyl sulfate solution with the mass fraction of 10%-12% into the PU touch matt varnish, uniformly mixing to obtain a mixed system, then adding absolute ethyl alcohol into the mixed system, and uniformly mixing to obtain the photochromic fluorescent oily ink.

The invention provides a lighting device (1) lighting device (10) comprising: (I) a first light source (110) configured to provide first light source light (101); (II) a luminescent material (200) configured to convert at least part of the first light source light (101) into luminescent material light (201); (III) a beam shaping optical element (300) having a light entrance side (341) and a light exit side (342), and a wall (347) bridging a distance between the light entrance side (341) and the light exit side (342), wherein at least part of the wall (347) is reflective for the luminescent material light (201), wherein the beam shaping optical element (300) is configured to receive at least part of the luminescent material light (201) at the light entrance side (341) and to provide beam shaped luminescent material light (201) at the light exit side (342); (IV) an elongated light transmissive body (100) having a first face (141) and a second face (142) defining a length (L) of the light transmissive body (100), and having one or more side faces (147) bridging the length (L) between the first face (141) and the second face (142), the light transmissive body (100) comprising a radiation input face (111) and a first radiation exit window (112), wherein the first face (141) comprises the radiation input face (111) and wherein the second face (142) comprises the first radiation exit window (112), wherein the radiation input face (111) is configured to receive at least part of the beam shaped light luminescent material light (201); (V) a second light source (120) configured to provide second light source light (121); wherein the elongated light transmissive body (100) is configured to receive at least part of the second light source light (121) via one or more of (i) incoupling of the second light source light (121) via the wall (347) of the beam shaping optical element (300), (ii) incoupling of the second light source light (121) via part of the first face (141) of the elongated light transmissive body (100), and (iii) incoupling of the second light source light (121) via part of the of the one or more side faces (147) of the elongated light transmissive body (100).

The invention provides a lighting device (1) comprising: —a luminescent concentrator (5) comprising an elongated light transmissive body (100) having a first face (141) and a second face (142) defining a length (L) of the light transmissive body (100), the light transmissive body (100) comprising one or more radiation input faces (111) and a radiation exit window (112), wherein the second face (142) comprises said radiation exit window (112); the elongated light transmissive body (100) comprising a luminescent material (120) configured to convert at least part of light source light (11) received at one or more radiation input faces (111) into luminescent material light (8), and the luminescent concentrator (5) configured to couple at least part of the luminescent material light (8) out at the radiation exit window (112) as converter light (101); —a light source mirror unit (200) comprising: —a plurality of light sources (10) configured to provide said light source light (11) in a direction of a curved mirror (220); —said curved mirror (220), configured to collect at least part of said light source light (11) and configured to redirect the collected light source light (11) to at least one of the one or more the radiation input faces (111) of the luminescent concentrator (5)

The invention provides multiple primary transparent luminescent light guides pumped with LEDs for pumping a secondary single transparent luminescent light guide from its sides for getting high light intensity from its light exit surface. Especially, the absorption and emission wavelength from the primary transparent light guides need to be lower than that of the secondary transparent luminescent light guide.