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公开(公告)号：US20220389313A1
公开(公告)日：2022-12-08
申请号：US17805458
申请日：2022-06-04
摘要： A white light emitting device comprises: an LED that generates excitation light of wavelength from 420 nm to 480 nm; and photoluminescence materials that generate light with a peak emission wavelength from 500 nm to 650 nm comprising a broadband phosphor, and a manganese-activated narrowband red fluoride phosphor with a peak emission wavelength from 628 nm to 640 nm and a full width at half maximum of less than 30 nm. The device generates white light with a selected color temperature from 2200K to 6500K, a General Color Rendering Index, CRI Ra, of at least 80, and a Duv (Delta u, v) from 0.0060 to 0.0170 for the selected color temperature and wherein the device has an LER (Luminous Efficacy of Radiation) of at least 320 lm/Wopt.
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公开(公告)号：US11442218B2
公开(公告)日：2022-09-13
申请号：US16791702
申请日：2020-02-14
发明人： Xianglong Yuan , Yi-Qun Li
IPC分类号： F21V8/00 , G02F1/13357 , C09K11/88 , C09K11/61 , C09K11/67 , C09K11/77 , G02F1/1335
摘要： There is provided a display backlight (604), including an excitation source (644) for generating blue light (650); and a wavelength converter (654) being a unitary construction including a combination of a wavelength selective filter layer (658) bonded to a photoluminescence layer (660), where the photoluminescence layer (658) includes a green photoluminescence material and a red photoluminescence material; and where the wavelength selective filter layer (658) is transmissive to blue light and reflective to green and red light.
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公开(公告)号：US20220107060A1
公开(公告)日：2022-04-07
申请号：US17543639
申请日：2021-12-06
发明人： Gang Wang , Jun-Gang Zhao , Yi-Qun Li
IPC分类号： F21K9/232 , H01L25/075 , H01L33/50 , C09K11/61 , C09K11/77
摘要： An LED-filament comprising: a partially light transmissive substrate; a plurality of LED chips on a front face of the substrate; a photoluminescence material that is in direct contact with and covers all of the plurality of LED chips; and a light scattering layer that is in direct contact with and covers at least the photoluminescence material, wherein the light scattering layer comprises particles of light scattering material, and wherein the photoluminescence material comprises broadband green to red photoluminescence materials and narrowband red photoluminescence material.
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公开(公告)号：US10557594B2
公开(公告)日：2020-02-11
申请号：US15815577
申请日：2017-11-16
发明人： Yi-Qun Li
IPC分类号： F21K9/64 , F21K9/232 , F21K9/233 , G02B6/00 , H01L33/50 , F21V8/00 , F21V3/02 , F21V7/04 , F21V29/506 , F21V29/70 , F21V29/83 , F21Y115/10
摘要： Disclosed are improved photoluminescence wavelength conversion components and lamps that incorporate such components. The photoluminescence wavelength conversion component comprises a hollow cylindrical tube having a given bore of diameter and an axial length. The relative dimensions and shape of the component can affect the radial emission pattern of the component and are configured to give a required emission pattern (typically omnidirectional). The photoluminescence material can be homogeneously distributed throughout the volume of the component during manufacture of the component. An extrusion method can be used to form the improved photoluminescence wavelength conversion component. Injection molding or casting can also be used to form the component. Another possible approach is to manufacture the component is by forming a flexible sheet material to include the phosphor and/or quantum dots, and then rolling the sheet material into the desired shape and dimensions for the component. The improved wavelength conversion components and lamps that incorporate these components provide for improved emission characteristic, while allowing for relatively cost-effective manufacturing costs. A further advantage of components is that their light emission resembles a filament of a conventional incandescent light bulb.
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公开(公告)号：US10535805B2
公开(公告)日：2020-01-14
申请号：US15870705
申请日：2018-01-12
IPC分类号： F21V21/00 , H01L33/50 , C09K11/88 , F21K9/232 , F21V31/00 , F21K9/237 , F21V19/00 , F21V3/10 , F21V3/06 , F21Y103/10 , F21Y115/10
摘要： A light emitting device (LED-Filament) comprises: a light-transmissive substrate; at least one blue LED chip mounted on the light-transmissive substrate, for instance mounted on a face thereof; and a photoluminescence material at least partially covering the at least one blue LED chip. The photoluminescence material comprises narrow-band red phosphor particles that generates light with a peak emission wavelength in a range of 600 nm to 640 nm and a full width at half maximum emission intensity of 50 nm to 60 nm. The light emitting device is characterized by CRI Ra greater than or equal to about 90. The narrow-band red phosphor particles can comprise at least one Group IIA/IIB selenide sulfide-based phosphor material such as for example CaSe1-x Sx:Eu (CSS phosphor). The LED-filament can be incorporated in a lamp, with a yellow to green-emitting phosphor that generates light with a peak emission wavelength in a range of 520 nm to 570 nm, to provide light with a color temperature in a range of 1500 K to 4000 K or 1500 K to 6500 K and a General Color Rendering Index (CRI Ra) greater than or equal to about 90 and a CRI R9 greater than or equal to about 50.
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公开(公告)号：US10234725B2
公开(公告)日：2019-03-19
申请号：US15078921
申请日：2016-03-23
发明人： Haitao Yang , Yi-Qun Li
IPC分类号： G02F1/1333 , G02F1/1335 , G02B5/20 , G02F1/1343
摘要： A photoluminescence color display comprises a display panel that displays red, green and blue sub-pixel areas, an excitation source operable to generate excitation radiation for operating the display, and a combined layer of photoluminescence materials and filter pigments. The combined layer comprises at least one photoluminescence material, such as a phosphor material or quantum dots, that is operable to emit light corresponding to red, green and blue sub-pixel areas of the display in response to said excitation radiation.
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公开(公告)号：US20180233632A1
公开(公告)日：2018-08-16
申请号：US15668394
申请日：2017-08-03
发明人： Xianglong Yuan , Bing Dai , Jonathan Melman , Charles Edwards
CPC分类号： H01L33/502 , B41F15/00 , C09K11/02 , C09K11/7734 , C09K11/7774 , G02B6/005 , G02F1/133615 , G02F2001/133614 , H01L33/501 , H01L33/60 , H01L2933/0041 , H01L2933/0058
摘要： A photoluminescent composition (“phosphor ink”) comprises a suspension of particles of at least one blue light (380 nm to 480 nm) excitable phosphor material in a light transmissive liquid binder in which the weight loading of at least one phosphor material to binder material is in a range 40% to 75%. The binder can be U.V. curable, thermally curable, solvent based or a combination thereof and comprise a polymer resin; a monomer resin, an acrylic, a silicone or a fluorinated polymer. The composition can further comprise particles of a light reflective material suspended in the liquid binder. Photoluminescence wavelength conversion components; solid-state light emitting devices; light emitting signage surfaces and light emitting signage utilizing the composition are disclosed.
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8.发明申请公开(公告)号：US20180130775A1
公开(公告)日：2018-05-10
申请号：US15376385
申请日：2016-12-12
发明人： Yi-Qun Li , Hwa (Harik) Su , Chienli (Jeff) Yang
CPC分类号： H01L25/0753 , F21K9/232 , F21K9/64 , F21V9/30 , F21V9/32 , H01L33/486 , H01L33/507 , H01L33/54 , H01L2224/48091 , H01L2224/73265 , H01L2924/0002 , H01L2924/00014 , H01L2924/00
摘要： An LED-based light source for generating light having a selected dominant wavelength λds comprises a package housing a plurality of LEDs consisting of LEDs from first and second wavelength bins. The first wavelength bin comprises LEDs having a dominant wavelength λd1 that is within a first wavelength range and the second wavelength bin comprises LEDs having a dominant wavelength λd2 that is within a second wavelength range. The first wavelength bin can comprise LEDs having a dominant wavelength that is shorter than the selected dominant wavelength whilst the second wavelength bin comprises LEDs having a dominant wavelength that is longer than the selected dominant wavelength. The wavelength bins and number of LEDs are selected such that in operation the dominant wavelength of the combined light emitted by the source is the selected dominant wavelength. Lighting arrangements and light emitting devices incorporating such light sources are disclosed.
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公开(公告)号：US09695357B2
公开(公告)日：2017-07-04
申请号：US14618219
申请日：2015-02-10
发明人： Yi-Qun Li , Dejie Tao , Shengfeng Liu
CPC分类号： C09K11/7734 , C09K11/0883 , C09K11/7731
摘要： Phosphors comprising a nitride-based composition represented by the chemical formula: M(x/v)(M′aM″b)Si(c−x)AlxNd:RE, wherein: M is a divalent or trivalent metal with valence v; M′ is at least one divalent metal; M″ is at least one trivalent metal; 2a+3b+4c=3d; and RE is at least one element selected from the group consisting of Eu, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb. Furthermore, the nitride-based composition may have the general crystalline structure of M′aM″bSicNd, where Al substitutes for Si within the crystalline structure and M is located within the crystalline structure substantially at the interstitial sites.
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公开(公告)号：US09595644B2
公开(公告)日：2017-03-14
申请号：US14727814
申请日：2015-06-01
发明人： Yi-Qun Li
CPC分类号： H01L33/502 , C09K11/0883 , C09K11/7734 , C09K11/7741 , C09K11/7774 , F21V3/12 , F21V5/041 , F21V9/30 , F21Y2101/00 , F21Y2103/10 , F21Y2115/10 , F21Y2115/30 , H01L2933/0041 , Y10T428/13 , Y10T428/24479 , Y10T428/265 , Y10T428/31511 , Y10T428/31663
摘要： A method of manufacturing an LED lighting arrangement, comprises: receiving an optical component having a diffusing material that is light diffusive and at least one photoluminescent material that is excitable by light of a first wavelength range and which emits light of a second wavelength range; receiving an LED assembly that is operable to generate the light of the first wavelength range and mounting the optical component to the LED assembly to form the LED lighting arrangement. The optical component having the diffusing and photoluminescent materials is mass produced separately from the LED assembly and can be selected such that light generated by the optical component combined with the light generated by the LED assembly corresponds to light of a selected color. Also disclosed are LED lighting arrangements, components for LED lighting arrangements and methods of fabricating an optical component.
摘要翻译： 一种制造LED照明装置的方法，包括：接收具有光散射的漫射材料的光学部件和可由第一波长范围的光激发并发射第二波长范围的光的至少一种光致发光材料; 接收可操作以产生所述第一波长范围的光并将所述光学部件安装到所述LED组件以形成所述LED照明装置的LED组件。 具有扩散和光致发光材料的光学部件与LED组件分开批量生产，并且可以选择使得由光学部件产生的光与由LED组件产生的光组合产生的光对应于选定颜色的光。 还公开了LED照明装置，用于LED照明装置的部件和制造光学部件的方法。
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