As noted above, LED chips 104, 105, 106 can be electrically connected into independently addressable groups such that the operating current to each group can be independently varied. While the invention has been described with respect to specific embodiments, one skilled in the art will recognize that numerous modifications are possible. 1A is a simplified cross-sectional side view of an emitter package according to an embodiment of the present invention. 1B described above, except that only the recess region and the LED die locations are shown. 14C a twelve-die configuration, and FIG. As shown in examples below, the use of broad-spectrum phosphors as well as a combination of different color groups can help to smooth the spectrum of the emitter, reducing spectral peaks and valleys that may contribute to a perception of the light as stark or unnatural. Other types of substrates can also be used. FIGS. List. CRI is a quantitative measure of how accurately an artificial light source reproduces object color across a range of colors, as compared with natural light. The spectrum shown in FIG. FIG. 17B shows a table of the CRI measurements of FIG. Each LED group can produce light of a different color, allowing the color of the emitter to be tuned by adjusting the relative amount of operating current supplied to each LED group. • Compact monolithic emitter ideal for directional lighting applications with high uniformity • Available in 2700K, 3000K, 3500K and 4000K color points with 95 CRI Minimum • Engineered to eliminate observable inter-device color-point variability common with high power LEDs • Binned at 350 mA, 85 OC • Maximum drive current: 2 A 2340 0 obj <>/Filter/FlateDecode/ID[<0B7C6C96D77BFA4C9C0ECBAB42B96B61>]/Index[2332 16]/Info 2331 0 R/Length 60/Prev 1548898/Root 2333 0 R/Size 2348/Type/XRef/W[1 2 1]>>stream 4A-4D show simplified top views of LED arrangements according to various embodiments of the present invention. h�bbd``b`��2 BH0k ��@�� H�]{*�9WY�X��?��0 ��� 11A-11D illustrate representative spectra obtained for the LED groups of FIG. High End Interior Experiential interior environments like retail stores, restaurants, galleries and museums demand high quality light and illumination. 5 shows a CIE color-space diagram for LED groups that produce spectra as shown in FIGS. FIG. Because it's USB-rechargeable, you can use it a lot without having to worry too much about its charge. The metal traces can provide electrical connection paths from LED chips 104, 105, 106 to peripheral contact pads 116 of substrate 102. 16A-16D illustrate representative spectra obtained for the LED groups of FIG. Nitecore's TIP CRI is a discreet keychain LED flashlight, but don't let its size fool you. It will be 300-500 Lumens I guess. No. 13C can be produced by a third (cool white) group in which each LED consists of a “CW” chip made from a 455-nm blue LED chip coated with YAG phosphor that produces a broad spectrum green-red light (FWHM about 130 nm) with a strong blue peak. FIG. And it’s not possible to use SST40 White + SST20DR, emitter must be in the same size. 3A-3D. 14A-14D show simplified top views of LED arrangements according to various embodiments of the present invention. Examples of suitable processes and systems are described in U.S. Patent App. Light sources based on light-emitting diodes (LEDs) are emerging as an energy-efficient replacement for conventional incandescent or halogen light sources in a variety of applications. CRI (color rendering index) is a measure of how accurately a light source illuminates objects' true colors. High-CRI LED lighting is a light-emitting diode (LED) lighting source that offers a high color rendering index (CRI). A CRI score of 95 or above is considered very high, and indicates that a light source will make objects appear very similar to how they would look under natural lighting conditions. 4C a twelve-die configuration, and FIG. 4B a nine-die configuration, FIG. FIG. Surface-mount-technology 1W 3V 6V 3030 SMD LED. 15 at various CCT points along the blackbody curve. 9B a nine-die configuration, FIG. Primary lens 108 can be used to focus or direct light generated by LED chips 104, 105, 106. FIG. 15 shows a CIE color-space diagram for the LED groups of FIGS. As can be seen, within the range from 2700 K to 6000 K, CRI exceeds 94, and R9 also exceeds 94. 3A-3C are graphs showing spectra for LED groups in a emitter according to a first example embodiment of the present invention. [Eye Safety] LH351D 5000K CRI 70 400mA v1.0 2016-09-26 DOWNLOAD [DXF] 3535 LEDs v1.0 2015-05-26 DOWNLOAD [IES] LH351D & LH351H-D 5000K CRI 70 v1.0 2018-02-27 DOWNLOAD LEDs belonging to these three groups can be arranged on an emitter. Quantity More Info Increase Button Decrease Button. Further, not all white light is created equal. 8A-8C show spectra for LED groups in a emitter according to a second example embodiment of the present invention. The particular LED chips and phosphor coatings can be varied. A color-tunable LED emitter with high CRI can be made by mounting multiple LED chips onto a ceramic substrate that has been patterned with metal contacts and paths so as to connect the LED chips into multiple independently addressable LED groups. In still other embodiments, the lookup table can be supplied to an external control circuit without being stored on the emitter. As FIG. 16A-16D illustrate representative spectra obtained for the LED groups of FIG. Qty. It is to be understood that other combinations of LED chips and phosphors can be substituted. Emitter package 100 can include a single ceramic substrate 102; LED chips 104, 105, 106; and a primary lens 108. Stage LED RGBLAC Multicolor LED Module 500W CCT Mixing 1800K-10000K. A first example of an emitter according to an embodiment of the present invention includes three groups of LEDs that produce different spectra (i.e., intensity of electromagnetic radiation as a function of wavelength), as shown in FIGS. CRI is a quantitative measure of a light's ability to reproduce the colors of objects faithfully in comparison with an ideal or natural light source. & Terms of Use. 5, 10, and 15). Suitable phosphors have a broad emission spectrum, e.g., full width at half maximum intensity (FWHM) of approximately 120 nm or more. FIGS. LED素子(LED Emitter) LED照明器具; LEDテープライト(LED Strip) LEDモジュール(LED Module) LED蛍光体(LED phosphor) 応 … The artificial light source can be tested using a number of CIE standard color samples; examples used herein are based on the standard R1-R15 sample set. 10 at various CCT. 1B is a simplified top view of am emitter package according to an embodiment of the present invention. FIG. 13C can appear to the human eye as a cool white light with color temperature around 6400 K. A spectrum as shown in FIG. FIGS. 5 at various CCT. & Terms of Use. 12A shows a table of CRI measurements for the LED groups of FIG. Gallery White, a high CRI warm white, is the answer for these discerning environments, providing the ability to highlight specific items and features with excellent color stability and control. LED chips 104, 105, 106 can be light-emitting diodes that generate light of a particular frequency, and each chip can be a bare-die semiconductor device. © 2004-2020 FreePatentsOnline.com. 4C a twelve-die configuration, and FIG. 7A as well as visible light emission (lumens) for the LED groups of FIG. 1 in a 12-die configuration similar to FIG. A color-tunable LED emitter with high CRI can be made by mounting multiple LED chips onto a ceramic substrate that has been patterned with metal contacts and paths so as to connect the LED chips into multiple independently addressable LED groups. . 3A-3C. 14B a nine-die configuration, FIG. 14A shows a seven-die configuration, FIG. of: 1,000. 13B can be produced by a second (red) LED group in which each LED consists of a red LED chip having a peak wavelength at approximately 621 nm. XLamp XM-L LEDs offer the unique combination of very high efficacy at very high drive currents, delivering 1000 lumens with 100 lumens-per-watt efficacy at 3 A in a compact, 5-mm x 5-mm footprint. In some embodiments, none of the LED chips are required to produce light along a blackbody locus in a color space (e.g., CIE color space). FIG. 13D can be produced by a fourth (warm white) LED group in which each LED consists of a WW 2700K chip (e.g., as described above) that produces a broad spectrum (FWHM about 130 nm) with a peak near 620 nm. High-CRI. Nitecore TIP CRI. This allows the color of the emitter to be tuned by adjusting the relative current supplied to each group.

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