CN110914382A - Apparatus including remote phosphor package having red-emitting phosphor and green-emitting quantum dots - Google Patents
Apparatus including remote phosphor package having red-emitting phosphor and green-emitting quantum dots Download PDFInfo
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- CN110914382A CN110914382A CN201780090701.0A CN201780090701A CN110914382A CN 110914382 A CN110914382 A CN 110914382A CN 201780090701 A CN201780090701 A CN 201780090701A CN 110914382 A CN110914382 A CN 110914382A
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/61—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing fluorine, chlorine, bromine, iodine or unspecified halogen elements
- C09K11/615—Halogenides
- C09K11/616—Halogenides with alkali or alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Luminescent Compositions (AREA)
- Led Device Packages (AREA)
Abstract
The remote phosphor package of the present invention comprises a green light emitting quantum dot material and a Mn of formula I dispersed in a host matrix4+Doping phosphor: a. thex[MFy]:Mn4+Wherein A is Li, Na, K, Rb, Cs or a combination thereof; m is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is [ MFy]The absolute value of the charge of the ion; and y is 5, 6 or 7.
Description
Cross Reference to Related Applications
This application is a non-provisional application of U.S. provisional application serial No. 62/304572 filed on 7/3/2016 and claiming priority to application 62/304572, the entire contents of which are incorporated herein by reference.
Background
Energy efficiency is a key feature in the consumer electronics field, and displays consume a significant portion of device power. Display power consumption greatly affects many features of electronic display devices, including battery requirements in mobile display applications as well as operating temperature and panel life of the devices, particularly in large display applications. In conventional display devices, a large portion of the energy consumed by the device is dedicated to the display, particularly to the display backlight unit. Conventional phosphors exhibit a broad emission spectrum, and thus a large amount of the generated light is filtered out by the color filter, thereby generating clearer color components. This broad spectrum filtering wastes light energy, reduces brightness, and increases the operating temperature of the display. Therefore, improvements in color gamut and brightness are desired.
Brief description of the drawings
FIG. 1A shows a conventional Liquid Crystal Display (LCD) with an edge lit (edge lit) backlight configuration.
Fig. 1B shows a direct lit (direct lit) backlight configuration for a conventional LCD.
Fig. 2 shows a backlight unit or module 200 according to the invention.
Fig. 3 shows a backlight unit according to the present invention.
Summary of The Invention
It has been found that a backlight unit comprising the remote phosphor package of the present invention exhibits improved efficiency over conventional display backlight units due to reduced wasted light energy due to efficient use of primary light. The remote phosphor package includes a green light emitting quantum dot material and a Mn of formula I dispersed in a host matrix4+Doping phosphor:
Ax[MFy]:Mn4+
I
wherein the content of the first and second substances,
a is Li, Na, K, Rb, Cs or a combination thereof;
m is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;
x is [ MFy]The absolute value of the charge of the ion; and
y is 5, 6 or 7.
Detailed Description
FIG. 1A shows a conventional Liquid Crystal Display (LCD) with an edge-lit backlight configuration. The LCD100A includes a primary or backlight source 102, a light guide plate 106, and an LCD panel 120. The LCD100 uses an LCD panel 120 with control electronics and a backlight 102 to produce color images. The backlight 102 provides white light.
The liquid crystal display panel 120 includes color filters 122, such as red, green, and blue color filters, arranged in the sub-pixels. The red, green, and blue color filters 122 transmit light having a specific wavelength of white light incident from the backlight 102. The color filters 122 transmit wavelengths of light corresponding to the colors of each color filter and absorb other wavelengths.
The LCD panel 120 also includes a front polarizer 118, a rear polarizer 114, a thin film transistor 126 and liquid crystals 116, and electrodes (not shown). A color filter 122 is located between the liquid crystal 116 and the front polarizer 118. Thin film transistor 126 is located between liquid crystal 116 and rear polarizer 114. Each pixel has a corresponding transistor or switch for controlling the voltage applied to the liquid crystal 116. The front polarizer 118 and the rear polarizer 114 may be disposed at a right angle. Typically, the LCD panel 120 is opaque. When a voltage is applied across the liquid crystal 116, the rod-like polymers align with the electric field and untwist, so that the voltage controls the light output from the front polarizer 118. For example, when a voltage is applied to the liquid crystal 116, the liquid crystal 116 rotates so that there is light output from the front polarizer 118.
The backlight 102 includes one or more blue LEDs and a yellow phosphor pumped by the blue LEDs to emit white light for the LCD 100. White light from the backlight 102 travels to the light guide plate 106, through the diffuser film 110 and the prism 108 and the dual brightness enhancement film 124, which provides a uniform light backlight for the liquid crystal display panel 120. Alternatively, the backlight 102 may include white LEDs that provide white light to the light guide plate 106. The white LED may use a blue LED having a broad-spectrum yellow phosphor or a blue LED having red and green phosphors.
Fig. 1B illustrates a direct type backlight configuration for a conventional LCD. As shown, its main differences from the edge lit configuration 100B include the different arrangement of the plurality of LEDs and the absence of the light guide plate 106. More specifically, the LEDs 102 are arranged to provide light directly to the diffuser plate 126, and the diffuser plate 126 is generally thicker than the diffuser film 110, thus supporting the diffuser film 110.
Fig. 2 shows a backlight unit or module 200 according to the invention comprising a light source 202, a light guide plate 204, a remote phosphor package 206, a dichroic filter 210 and an LCD panel 216. The backlight unit 200 may also optionally include a prism 212 and a dual brightness enhancement film 214. The light source 202 is an LED emitting blue light. To produce uniform illumination, blue light from the light source 202 first passes through the light guide plate 204, and the light guide plate 204 diffuses the blue light. Similar to LCD panel 120 of conventional LCD100, LCD panel 216 also includes color filters, front polarizers, rear polarizers, and liquid crystals and electrodes arranged in the subpixels. Typically, an air gap exists between the LCD panel 216 and the dual brightness enhancement film 214. The dual brightness enhancement film 214 is a reflective polarizing film that improves efficiency by repeatedly reflecting back any unpolarized light that would otherwise be absorbed by the rear polarizer of the LCD. The dual brightness enhancement film 214 is placed behind the liquid crystal display panel 216 without any other film in between. The dual brightness enhancement film 214 may be mounted in such a manner that its transmission axis is substantially parallel to that of the rear polarizer. The dual brightness enhancement film 214 helps to recycle the white light 222 that would normally be absorbed by the rear polarizer (not shown) of the liquid crystal panel 216, thereby increasing the brightness of the liquid crystal display panel 216.
Those skilled in the art will appreciate that the backlight unit according to the present invention may vary in configuration. For example, a direct-lit configuration may be used, similar to that shown in FIG. 1B. In another embodiment, the prism 212 may be eliminated or replaced with other brightness enhancing components. In another embodiment, the dual brightness enhancement film 214 may be eliminated.
Unlike the conventional LCD100, instead of using the red and green phosphors 110A and 110B, a remote phosphor package 206 is used that includes particles 208A of a complex fluoride phosphor of formula I and particles 208B of a green quantum dot material. By "remote" is meant that the primary light source and the phosphor material are separate elements, the phosphor material not being integrated with the primary light source into a single element. Primary light is emitted from the primary light source traveling through one or more external media to radiationally couple the LED light source to the QD phosphor material.
Based on Mn4+The red-emitting phosphors of the activated complex fluoride materials (such as those described in US7,358,542, US7,497,973, and US7,648,649) strongly absorb blue light and effectively emit between about 610 nm to 635 nm with little deep red/NIR emission. The complex fluoride phosphor of formula I has a host lattice containing coordination centers surrounded by fluoride ions as ligands, and is charge-compensated by a counter ion (a) if necessary. For example, at K2[SiF6]In (3), the coordination center is Si and the counterion is K. Complex fluorides are sometimes expressed as combinations of simple binary fluorides, but this expression does not indicate the coordination number of ligands around the coordination center. Brackets (occasionally omitted for simplicity) indicate that the complex ions they contain are a new chemical species, unlike simple fluoride ions. Mn4+The dopant or activator acts as an additional coordination center, replacing a portion of the coordination center (e.g., Si), thereby forming a luminescent center. The host lattice (including the counter ion) may further modify the excitation and emission properties of the activator ion.
The counterion of formula I is Li, Na, K, Rb, Cs, or a combination thereof, and y is 6. In certain embodiments, a is Na, K, Rb, or a combination thereof. The coordination center M of formula I is an element selected from the group consisting of: si, Ge, Ti, Zr, Hf, Sn, Al, Ga, In, Sc, Y, Bi, La, Gd, Nb, Ta, and combinations thereof. In certain embodiments, M is Si, Ge, Ti, or a combination thereof. Examples of phosphors of formula I include K2[SiF6]:Mn4+、K2[TiF6]:Mn4+、K2[SnF6]:Mn4+、Cs2[TiF6]:Mn4+、Rb2[TiF6]:Mn4+、Cs2[SiF6]:Mn4+、Rb2[SiF6]:Mn4+、Na2[TiF6]:Mn4+、Na2[ZrF6]:Mn4+、K3[ZrF7]:Mn4+、K3[BiF7]:Mn4+、K3[YF7]:Mn4+、K3[LaF7]:Mn4+、K3[GdF7]:Mn4+、K3[NbF7]:Mn4+、K3[TaF7]:Mn4+. In certain embodiments, the phosphor of formula I is K2[SiF6]:Mn4+。
The QD material for remote phosphor packages comprises at least one set of QDs capable of emitting green light upon excitation by a blue light source. The QD wavelength and concentration can be tuned to meet the desired optical properties. Preferred QD characteristics include high quantum efficiency (e.g., about 90% or more), continuous and tunable emission spectra, and narrow and sharp spectral emissions, e.g., less than 40nm, 30nm or less, or 20nm or less full width at half maximum (FWHM).
The green light-emitting quantum dot material may include group II-VI compounds, group III-V compounds, group IV-IV compounds, group I-III-VI2A family compound or a mixture thereof. Non-limiting examples of group II-VI compounds include CdSe, CdTe, CdS, ZnSe, ZnTe, ZnS, HgTe, HgS, HgSe, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, or combinations thereof. The III-V compound may be selected from the group consisting of: GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaGaAs, AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GalnNP, GalnNAs, GalnPAs, InAlNP, InAlNAs, InAlPAs, and combinations thereof. Examples of the group IV compound include Si, Ge, SiC and SiGe. I-III-VI2Examples of group chalcopyrite-type compounds include CuInS2、CuInSe2、CuGaS2、CuGaSe2、AgInS2、AgInSe2、AgGaS2、AgGaSe2And combinations thereof.
The QDs for the remote package may be core/shell QDs comprising a core, at least one shell coated on the core, and an outer coating comprising one or more ligands, preferably organic polymeric ligands. Exemplary materials for making core-shell QDs include, but are not limited toSi, Ge, Sn, Se, Te, B, C (including diamond), P, Co, Au, BN, BP, BAs, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, InAs, InSb, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, ZnO, ZnS, ZnSe, ZnTe, CdS, CdSe, CdSeZn, CdTe, HgS, HgSe, HgTe, BeS, BeSe, BeTe, MgS, MgSe, MnS, MnSe, GeS, GeSe, GeTe, SnS, SnSe, SnTe, PbO, PbS, PbSe, PbTe, CuF, CuCl, CuBr, CuI, Si, PbTe, Cu, Si3N4、Ge3N4、Al2O3、(Al,Ga,In)2(S,Se,Te)3、Al2CO and suitable combinations of two or more such materials. Exemplary core-shell QDs include, but are not limited to, CdSe/ZnS, CdSe/CdS/ZnS, CdSeZn/ZnS, InP/ZnS, PbSe/PbS, CdTe/CdS, and CdTe/ZnS.
QD materials typically include ligands bound, complexed, associated, or attached to their surfaces. In particular, the QDs may include a coating comprising ligands to protect the QDs from environmental conditions, including elevated temperature, high intensity light, external gases and moisture, control aggregation, and allow the QDs to disperse in the matrix material.
In some embodiments, remote phosphor packages according to the present disclosure may include a narrow green emitting phosphor material in place of or in addition to a quantum dot material. Examples of suitable green emitting phosphors include CdS In, SrGa2S4:Eu、CaSO4Bi, SrS Mn, ZnS Eu and CaGa2S4:Eu。
The remote phosphor package material also includes a host material in which the QD-phosphor material is embedded or otherwise disposed. Suitable matrix materials are transparent, non-yellowing, and chemically and optically compatible with the backlight unit assembly (including the QDs and any surrounding packaging materials or layers). Preferred host materials have low oxygen and moisture permeability, exhibit high photostability and chemical stability, exhibit good refractive index, and adhere to barrier or other layers adjacent to the QD phosphor material, thereby providing a hermetic seal to protect the QD-phosphor material.
Examples of matrix materials for the QD phosphor materials of the present invention include epoxy, acrylate, norbornene, polyethylene, poly (vinyl butyral): poly (vinyl acetate), polyurea, polyurethane; silicones and silicone derivatives including, but not limited to, amino silicones (AMS), polyphenylmethylsiloxanes, polyphenylalkylsiloxanes, polydiphenylsiloxanes, polydialkylsiloxanes, silsesquioxanes, fluorinated silicones, and vinyl and hydride substituted silicones; acrylic polymers and copolymers formed from monomers including, but not limited to, methyl methacrylate, butyl methacrylate, and lauryl methacrylate; styrene-based polymers such as polystyrene, Aminostyrene (APS) and poly (acrylonitrile-ethylene-styrene) (AES); polymers crosslinked with difunctional monomers such as divinylbenzene; crosslinkers suitable for crosslinking ligand materials, epoxides which combine with ligand amines (e.g., APS or PEI ligand amines) to form epoxy polymers.
Referring to fig. 3, the backlight unit 300 according to the present invention includes a back plate 2, and a light guide plate 4, an LED light source 6, a mounting bracket 8, and a remote phosphor package 10 in the form of a strip mounted in the back plate 2. The remote phosphor package 10 is mounted between the light guide plate 4 and the LED light sources 6 by the mounting bracket 8, whereby light emitted from the backlight 6 is transmitted through the composite material 10 and then into the light guide plate 4. The backlight unit may further include a bottom reflection plate 14 disposed between the light guide plate 4 and the rear plate 2 and an optical film assembly 16 disposed over the light guide plate 4.
While only certain features of the invention have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
Claims (15)
1. A backlight unit comprising a semiconductor light source and a remote phosphor package radiationally coupled to an LED light source; the remote phosphor package includes a green light emitting quantum dot material dispersed in a host matrix and a Mn of formula I4+Doping phosphor:
Ax[MFy]:Mn4+
I
wherein the content of the first and second substances,
a is Li, Na, K, Rb, Cs or a combination thereof;
m is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;
x is [ MFy]The absolute value of the charge of the ion; and
y is 5, 6 or 7.
2. The backlight unit as claimed in claim 1, wherein the color-stable Mn4+The doped phosphor is K2SiF6:Mn4+。
3. The backlight unit of claim 1, wherein the quantum dot material comprises CdSe.
4. The backlight unit of claim 1, wherein the quantum dot material comprises InP.
5. A remote phosphor package comprising a green light emitting quantum dot material and Mn of formula I dispersed in a host matrix4+Doping phosphor:
Ax[MFy]:Mn4+
I
wherein the content of the first and second substances,
a is Li, Na, K, Rb, Cs or a combination thereof;
m is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;
x is [ MFy]The absolute value of the charge of the ion; and
y is 5, 6 or 7.
6. The remote phosphor package of claim 5, wherein the color stable Mn4+The doped phosphor is K2SiF6:Mn4+。
7. An apparatus comprising an LED light source radiationally coupled to the remote phosphor package of claim 5.
8. A backlight unit comprising the apparatus of claim 7.
9. An electronic device comprising the backlight unit of claim 8.
10. An apparatus comprising a semiconductor light source radiationally coupled to a green light emitting quantum material and Mn of formula I4+The doping of the phosphor(s) is carried out,
Ax[MFy]:Mn4+
I
the green light emitting quantum dot material comprises II-VI compounds, III-V compounds, IV compounds, I-III-VI2A group compound or a mixture thereof;
wherein the content of the first and second substances,
a is Li, Na, K, Rb, Cs or a combination thereof;
m is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;
x is [ MFy]The absolute value of the charge of the ion; and
y is 5, 6 or 7.
11. The apparatus of claim 10, wherein the color-stable Mn is4+The doped phosphor is K2SiF6:Mn4+。
12. The apparatus of claim 10, wherein the quantum dot material comprises CdSe.
13. The device of claim 10, wherein the quantum dot material comprises InP.
14. A backlight unit comprising the apparatus of claim 10.
15. An electronic device comprising the backlight unit of claim 14.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2017/027209 WO2018190827A1 (en) | 2017-04-12 | 2017-04-12 | Devices containing a remote phosphor package with red line emitting phosphors and green emitting quantum dots |
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| CN201780090701.0A Pending CN110914382A (en) | 2017-04-12 | 2017-04-12 | Apparatus including remote phosphor package having red-emitting phosphor and green-emitting quantum dots |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3609979A1 (en) |
| KR (1) | KR102380421B1 (en) |
| CN (1) | CN110914382A (en) |
| CA (1) | CA3063060A1 (en) |
| WO (1) | WO2018190827A1 (en) |
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| WO2021211181A1 (en) | 2020-04-14 | 2021-10-21 | General Electric Company | Ink compositions and films with narrow band emission phosphor materials |
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| US20160093776A1 (en) * | 2014-03-13 | 2016-03-31 | General Electric Company | Lighting apparatus including color stable red emitting phosphors and quantum dots |
| CN105765428A (en) * | 2013-10-17 | 2016-07-13 | 纳米系统公司 | Light emitting diode (LED) devices |
| US20160312114A1 (en) * | 2013-03-15 | 2016-10-27 | General Electric Company | Processes for preparing color stable red-emitting phosphors |
| WO2016186636A1 (en) * | 2015-05-18 | 2016-11-24 | General Electric Company | Process for manufacturing mn-doped fluoride phosphors |
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| US7358542B2 (en) | 2005-02-02 | 2008-04-15 | Lumination Llc | Red emitting phosphor materials for use in LED and LCD applications |
| US7497973B2 (en) | 2005-02-02 | 2009-03-03 | Lumination Llc | Red line emitting phosphor materials for use in LED applications |
| US7648649B2 (en) | 2005-02-02 | 2010-01-19 | Lumination Llc | Red line emitting phosphors for use in led applications |
| US20130335677A1 (en) * | 2012-06-15 | 2013-12-19 | Apple Inc. | Quantum Dot-Enhanced Display Having Dichroic Filter |
| US9698314B2 (en) * | 2013-03-15 | 2017-07-04 | General Electric Company | Color stable red-emitting phosphors |
| JP6511528B2 (en) * | 2015-03-23 | 2019-05-15 | インテマティックス・コーポレーションＩｎｔｅｍａｔｉｘ Ｃｏｒｐｏｒａｔｉｏｎ | Photoluminescent color display |
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2017
- 2017-04-12 CN CN201780090701.0A patent/CN110914382A/en active Pending
- 2017-04-12 EP EP17723171.9A patent/EP3609979A1/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160312114A1 (en) * | 2013-03-15 | 2016-10-27 | General Electric Company | Processes for preparing color stable red-emitting phosphors |
| CN105765428A (en) * | 2013-10-17 | 2016-07-13 | 纳米系统公司 | Light emitting diode (LED) devices |
| US20160093776A1 (en) * | 2014-03-13 | 2016-03-31 | General Electric Company | Lighting apparatus including color stable red emitting phosphors and quantum dots |
| WO2016186636A1 (en) * | 2015-05-18 | 2016-11-24 | General Electric Company | Process for manufacturing mn-doped fluoride phosphors |
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| KR102380421B1 (en) | 2022-03-31 |
| WO2018190827A1 (en) | 2018-10-18 |
| CA3063060A1 (en) | 2018-10-18 |
| KR20190139268A (en) | 2019-12-17 |
| EP3609979A1 (en) | 2020-02-19 |
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