Full spectrum white light emitting device

Abstract

To improve the color rendering of a full spectrum light emitting device that includes a photoluminescence conversion material to produce white light.SOLUTION: A full spectrum light emitting device 310a includes a photoluminescent material (e.g., encapsulant 366) that produces light having a peak emission wavelength in the range of 490 nm to 680 nm (green to red) and a broadband solid-state excitation source operable to produce broadband blue excitation light having a dominant wavelength in the range of 420 nm to 470 nm, wherein the broadband blue excitation light includes at least two distinct blue emissions (from LED chips 330 and 332, respectively) in the wavelength range of 420 nm to 480 nm.SELECTED DRAWING: Figure 3a

Description

[Technical field]

[0001] Embodiments of the present invention provide full spectrum white light emission including photoluminescent wavelength conversion materials. More specifically, but not exclusively, embodiments are directed to devices that mimic natural light. To generate full spectrum white light with a spectrum ranging from blue light to red light The present invention also relates to a full spectrum white light emitting device having a high color rendering index. Full spectrum, producing full spectrum white light with a CRI and / or fidelity index The present invention relates to a white light emitting device. [Background technology]

[0002] White-emitting LEDs ("white LEDs") absorb a portion of the blue light emitted by the LED. One or more photoluminescent materials (typically The blue light emitted by the LED is absorbed by the phosphor material. The unabsorbed portion combines with the light emitted by the phosphor to produce what appears to be white to the eye. Its long operating life (>50,000 hours) and high luminous efficacy (1W) With over 100 lumens per unit, white LEDs outperform conventional fluorescent lamps and compact fluorescent They are rapidly replacing incandescent lamps.

[0003] There are various metrics to quantify the characteristics and quality of the light produced by a white light source. The two most commonly used metrics within the solid-state lighting industry are Correlated Color Temperature (CTC). CCT (Certified Color Temperature) and the International Commission on Illumination (ICIL) CIE (Common Illumination) General Color Rendering Index (CRI) R It is a.

[0004] The CCT of a lighting source is measured in Kelvin (K) and corresponds to the color of the light produced by the lighting source. is the color temperature of a Planckian (blackbody) radiator that emits light of the color indicated.

[0005] The general CRI Ra is a measure of how faithfully a lighting source renders the true color of an object. The illumination of the eight color test samples (R1-R8) was characterized by the difference in illumination intensity between the reference source and the illumination of the eight color test samples (R1-R8). The standard is based on a measurement of how well the lighting is compared to that provided by a standard illumination source. Generally, the higher the CRI, the closer the radiator is to a black radiator and natural light. Ra can take negative values, with the maximum value being 100. All of the color samples R1 to R8 are Pastel colors (low saturation colors "light grayish red" to "reddish purple") Therefore, a typical CRI Ra is equivalent to an incandescent light source that produces a full spectrum that closely resembles sunlight. However, the spectrum is peaked, giving a useful measure of subtle differences in the light output of the For white LEDs made up of a single crystal, a typical CRI Ra is 100% over a limited color range. It is an average measurement of color reproduction over a wide range of lighting conditions, and relates to the ability of a lighting source to produce specific colors or highly saturated colors. It has been found to be insufficient because it is uninformative. When characterizing a full white light-emitting device, the CRI color samples R9 to R12 (saturated color, saturated red "Color", "Saturated Yellow", "Saturated Green", "Saturated Blue") and R13~R15 ("Light Skin Color", "Leaf green", "Medium flesh" etc. were considered to give a meaningful characterization of full spectrum light. This should be taken into consideration.

[0006] To address the general CRI Ra limit, the Illuminating Engineer The International Society of Color Metrics (IES) recently developed TM-30, a standard for measuring and characterizing the color performance of lighting sources. The Illuminating and Optical Instruments Association (2015) announced a standard for "Method for Evaluating ing Light Source Color Rendition”TM-30-1 5) Under the TM-30-15 standard, two metrics are used to measure the illumination source, the fidelity index (R f ), and the global index (R g The IES TM-30-15 method characterizes the color rendering properties of It is highly correlated with human color perception and therefore provides a more accurate characterization of the light properties of the illumination source. It is believed that the fidelity index R f is similar to the common CRI Ra and is the ratio of the brightness of the light source to the brightness of the light source. Characterize how faithfully a source renders the true color of an object and use 99 color samples It measures how well the illumination of a given illumination source compares with the illumination provided by a reference source. The fidelity index R f The value ranges from 0 to 100. The samples were selected to be more representative of objects likely to be encountered in real-life applications. The resulting fidelity index R f is a more accurate measurement of color rendering than the common CRI Ra. It is believed that f CRI R is measured with a larger number of color samples, so it is generally It will be very difficult to achieve a high score compared to a. Furthermore, the test procedures are different. Therefore, the common CRI Ra and Fidelity Index R f The values ​​of are not equal to each other.

[0007] All area index Rg focuses on color saturation and the average saturation level compared to a reference source The gamut index correlates with the vividness of the appearance of a colored object. g The value is The range is 60 to 140, with values ​​below 100 indicating reduced saturation and values ​​above 100 indicating , showing increased saturation compared to the reference source.

[0008] Known white LEDs commonly used in mobile phone display backlighting A further problem is the potential damage to the human eye, especially with ever-increasing screen time usage. The damage it causes is called the "American Macular Degeneration Foundation." The AMDF (Amplification of Degeneration of the Macular Degeneration) is a study that shows that blue light in the spectrum is more effective at preventing age-related macular degeneration than any other light in the spectrum. It has been reported that the 400nm to 500nm region is thought to accelerate AMD. High-energy visible (HEV) blue light in the retinal range has long been considered the most dangerous light for the retina. Almost all visible blue light passes through the cornea and the lens, This light can affect vision and cause the eyes to age prematurely. Research has shown that excessive exposure to blue light (HEV) can cause digital eye strain and retinal damage. This has been shown to have the potential to cause vision problems such as age-related macular degeneration. This damage occurs when blue light (HEV) penetrates the macular pigment in the eye and destroys the retina. This occurs when cells are exposed to blue light and become susceptible to cell degeneration.

[0009] The present invention provides a high CRI Ra and / or a high fidelity index R f It has high color rendering properties such as Color rendering of a full spectrum light emitting device containing a photoluminescent conversion material that produces white light - Patents.com The present invention also arises out of an attempt to improve the performance of the fluororesin, as discussed above. It also mitigates issues associated with white LEDs causing damage to the human eye when exposed to HEVs. Summary of the Invention

[0010] The present invention provides a fluorescent light source having a spectral content from blue light to red light that is as close as possible to natural light. The present invention relates to a full spectrum white light emitting device for generating full spectrum white light. The full spectrum white light emitting device according to the present invention can be implemented using a broadband blue excitation source, e.g. The LED uses a broadband blue solid-state light emitting diode (ED) with a dominant wavelength in the range of 420 nm to 480 nm. In this patent specification, "broadband" blue light is defined as light having a wavelength of at least 25 nm. , preferably at least 30 nm FWHM (Full Width Half Maximum) It is used to indicate blue light with a wavelength of 420 nm to 480 nm. Used to describe blue light that consists of a combination of blue emissions of at least two different wavelengths. This is also fine.

[0011] Broadband blue excitation light is a combination of blue emissions of two or more different wavelengths, e.g. Short-wavelength blue light in the wavelength range of 420nm to 450nm and long-wavelength light in the wavelength range of 450nm to 480nm Blue light of different wavelengths can be produced using a combination of blue light of different wavelengths. There are two methods: (i) using multiple individual blue LEDs with different dominant wavelengths (narrowband LEDs) ) or (ii) using a number of distinct quantum wells, e.g., specially designed, in the active region. By using individual LEDs (broadband LEDs) that emit multiple blue wavelengths using a single light source, Thus, a broadband blue solid-state excitation source can be generated by one or more narrow band The solid-state light source may be, for example, an LED or a laser diode, each of which may be , "directly" generate narrowband blue light with different dominant wavelengths in the range of 420nm to 480nm. Alternatively, the broadband blue solid-state excitation source may also be a broadband blue solid-state light source, e.g. Multiple quantum wells in a multiple-quantum-well (MQW) structure are used to generate multiple InGaN / GaN blue LEDs with active regions that directly generate blue light of wavelengths The broadband blue solid-state excitation source of the present invention includes a broadband blue LED having a wavelength of 15 nm to 20 nm. Utilizing a narrowband blue LED that produces a single narrowband wavelength of blue light with a FWHM in the range Typically, the FWHM of the broadband blue excitation light of the present invention is is at least 25 nm, preferably at least 30 nm, and the FWHM is, for example, It can be in the wavelength range of 25nm to 50nm, but it can also be in the range of 30nm to 50nm, 35nm to 50nm m, 40 nm to 50 nm, or 45 nm to 50 nm. The blue solid-state excitation source is a blue-emitting (420 nm to 480 nm) photoluminescent material (fluorescence (body) to indirectly convert blue excitation light into photoluminescence through a process of ultraviolet light This is further contrasted with known white LEDs that utilize UV ​​solid-state light sources (UV LEDs) to generate In other words, the broadband blue solid-state excitation source / white light-emitting device according to the present invention has a wavelength of 420 nm to Does not utilize photoluminescent materials to generate excitation light in the 480 nm range / Does not include.

[0012] According to one embodiment of the present invention, a peak emission wavelength in the range of 490 nm to 550 nm a first photoluminescent material that produces light and has a peak in the range of 600 nm to 680 nm; a second photoluminescent material that produces light having an emission wavelength of 420 nm to 480 nm; The excitation light has a dominant wavelength in the range of 100 nm and a FWHM of 30 nm or more. and a broadband solid-state excitation source operable as described above. can be.

[0013] According to another aspect of the present invention, the full spectrum light emitting device has a wavelength of 490 nm to 680 nm. (the green to red region of the visible spectrum) Photoluminescent material and broadband blue light with a dominant wavelength in the range of 420 nm to 480 nm and a broadband blue solid-state excitation source operable to generate the color excitation light, The blue excitation light has at least two different wavelengths in the wavelength range of 420 nm to 480 nm. The present invention provides a method for producing a wideband blue excitation light (i.e., blue light having multiple wavelengths). A full spectrum light emitting device including a broadband blue solid-state excitation source that produces , especially at CRI R11 (saturated green) and CRI R12 (saturated blue), the device It has been found to increase the color rendering of white light produced by narrow band (FWHM 15nm~20nm) blue excitation source, and the green, yellow, and red regions of the visible spectrum Known white LEDs that utilize phosphor conversion in the dark produce a strong narrow blue peak that exceeds that of sunlight. Green, yellow, and red spots for sparkle emission and color temperatures ranging from 3000K to 6500K. It exhibits broadband phosphor emission that spreads over the spectrum. Furthermore, There is a pronounced trough in the cyan region of the spectrum (490 nm to 520 nm). As a result, the CRI R11 and CRI R12 values, especially the CC in the range of 4000K to 6500K, In contrast, the full-field emission luminescence (FDE) of the present invention, which utilizes a broadband blue solid-state excitation source, has a lower value of T. In a spectrally emitting device, broadband blue excitation light partially fills the cyan spectral trough. This results in a significant improvement in CRI R11 and CRI R12.

[0014] The light emitting device according to the present invention produces white light that more closely resembles natural light than known white LEDs. In some embodiments, the light emitting device has a CRI R1 of 90 or greater. ~CRI R15 (full color spectrum) and / or typical CRI Ra of 95 or higher In some embodiments, the emitter may be characterized as producing white light having a Optical devices have CRI R1 to CRI R15 (full color spectrum) of 95 or higher and / or characterized by producing white light with a typical CRI Ra of 99 or greater In an embodiment, the light emitting device has a CRI R12 ("saturated blue") of 90 or greater. In one embodiment, the present invention can be characterized as producing white light having a "white color." The light emitting device has an IEC TM-30 Fidelity Index R of 96 or greater. f To generate white light having It can be characterized by:

[0015] In an embodiment, the light emitting device has a color temperature in the range of about 2500K to about 6500K, Color temperature in the range of 500K to 3000K, color temperature in the range of 4000K to 5000K 5000K to 6500K, or white light having a color temperature in the range of about 5000K to about 6500K. It may be operable.

[0016] In some embodiments, at least two of at least 5 nm or at least 10 nm. The broadband blue solid-state excitation source has a wavelength difference between 25 nm and 50 nm. It is possible to generate broadband blue excitation light having a FWHM of 0.01 μm.

[0017] The broadband blue solid-state excitation source produces narrowband blue emissions having different respective dominant wavelengths. The device may include two or more solid-state light sources, and the excitation light may include a composite light generated by the solid-state light sources. In one such embodiment, the solid state excitation source may emit light in the range of 420 nm to 450 nm. a first solid-state light source operable to generate blue light emission having a first dominant wavelength within 45 and operable to generate blue light having a second dominant wavelength in the range of 0 nm to 480 nm. and a second solid-state light source capable of emitting broadband blue excitation light. In some embodiments, the composite light generated by the first and second solid-state light sources includes a first dominant wavelength. The first dominant wavelength is in the range of 420 nm to 450 nm, and the second dominant wavelength is in the range of 450 nm to 480 nm. It is within the range.

[0018] In another embodiment, the broadband blue solid-state excitation source comprises at least two distinct blue emitting each of which is formed by forming an active region having at least two different quantum wells. The light emitting diode may include an LED having a light emitting diode.

[0019] In an embodiment, the photoluminescent material has a peak in the range of 490 nm to 550 nm. a green to yellow photoluminescent material that produces light having a peak emission wavelength of 600 nm; Red photoluminescent material that produces light with a peak emission wavelength in the range of ~680 nm The embodiment of the present invention includes a peak in the range of 600 nm to 650 nm. The optical fiber further includes an orange to red photoluminescent material that produces light having a peak emission wavelength. This can be done.

[0020] In an embodiment, the light emitting device has a luminance of 220 lm / W. opt or greater luminous efficacy (LE), or 260Im / W opt It is characterized by a luminous efficacy (LE) of 100 or higher.

[0021] The present invention is directed to green to yellow photoluminescent materials, red photoluminescent materials, and any orange-red photoluminescent material, along with a broadband blue solid-state excitation source. It finds utility in packaged devices. In this embodiment, the photoluminescent material is located remotely relative to a broadband blue solid-state excitation source. This can be done.

[0022] The present invention provides full spectrum imaging with high color rendering quality, i.e., a typical CRI Ra of 95 or higher. Although the invention arose in the context of a white light emitting device for producing 800 ohm white light, the invention also relates to a Light emitting devices may also find utility for producing light having a CRI Ra as low as In such applications, the use of a broadband blue solid-state excitation source is advantageous over the use of a narrowband blue excitation source. and / or reduce damage to the human retina and / or reduce damage to the human macular fossa compared to known white LEDs. This is because the same blue photon energy can be applied over a higher wavelength range. This is because the blue peak is vertically dispersed, thereby reducing the intensity of the blue peak.

[0023] In embodiments, the present invention is directed to a method for the treatment of a vitello-acute myocardial infarction, comprising administering to said subject a therapeutically effective amount of the ... For this purpose, the light emitting devices described herein are contemplated.

[0024] In embodiments, the present invention is directed to the use of the present invention in reducing damage to the human retina or reducing degeneration of the human macular macula. Use of the light emitting devices described herein is encompassed. [Brief description of the drawings]

[0025] These and other aspects and features of the present invention are best understood in connection with the following detailed description of specific embodiments of the invention, taken in conjunction with the accompanying drawings, in which: It will become apparent to those of ordinary skill in the art upon review of the following description. [Figure 1a] 1 illustrates a remote phosphor full spectrum white light emitting device according to some embodiments. [Figure 1b] 1 illustrates a remote phosphor full spectrum white light emitting device according to some embodiments. [Figure 2a] FIG. 1B is a schematic diagram of a broadband blue solid-state excitation source according to one embodiment of the present invention for use in the full-spectrum white light-emitting device of FIGS. [Figure 2b] FIG. 2 is a schematic diagram of a broadband blue solid-state excitation source according to another embodiment of the present invention for use in the full-spectrum white-light-emitting device of FIGS. 1a and 1b. [Figure 3a] 1 is a schematic cross-sectional view of a full spectrum white light emitting device according to some embodiments. [Figure 3b] 1 is a schematic cross-sectional view of a full spectrum white light emitting device according to some embodiments. [Figure 4a] 1 is a schematic diagram of a full spectrum white light emitting device according to some embodiments. [Figure 4b] 1 is a schematic diagram of a full spectrum white light emitting device according to some embodiments. [Figure 5a] 1 is a graph showing the emission spectrum, normalized intensity (au) versus wavelength (nm) of a 454.4 nm narrowband LED (prior art). [Figure 5b]1 is an emission spectrum, normalized intensity (au) versus wavelength (nm) of a broadband blue solid-state excitation source according to the present invention, including a combination of two LEDs having dominant wavelengths λd1=452 nm and λd2=462 nm. [Figure 6] FIG. 1 shows emission spectra, normalized intensity (au) versus wavelength (nm) of a broadband blue solid-state excitation source according to the present invention, including (i) a combination of LEDs having two different dominant wavelengths λd1=446 nm and λd2=463 nm, and (ii) a combination of LEDs having three different dominant wavelengths λd1=448 nm, λd2=453 nm, and λd3=461 nm. [Figure 7] Emission spectrum, normalized intensity (au) versus wavelength (nm) of a broadband blue solid-state excitation source including a broadband multiple quantum well LED. [Figure 8] Emission spectra, normalized intensity (normalized to CIE1931XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.1 (thick solid line), (ii) Com.1 (dashed line), (iii) Planckian spectrum with the same CCT as that of Dev.1 (2701K) (thin solid line), and (iv) Planckian spectrum with the same CCT as that of Com.1 (2768K) ​​(dotted line). [Figure 9] Emission spectra, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.2 (thick solid line), (ii) Com.2 (dashed line), (iii) Planckian spectrum with the same CCT as that of Dev.2 (3867K) (thin solid line), and (iv) Planckian spectrum with the same CCT as that of Com.2 (3810K) (dotted line). [Figure 10] Emission spectra, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.3 (thick solid line), (ii) Com.3 (dashed line), (iii) Planckian spectrum with the same CCT as that of Dev.3 (4172 K) (thin solid line), and (iv) Planckian spectrum with the same CCT as that of Com.3 (4173 K) (dotted line). [Figure 11] Emission spectrum, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.4 (solid line) and (ii) Planckian spectrum (dotted line) with the same CCT as that of Dev.4 (4864K). [Figure 12] Emission spectrum, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.5 (solid line) and (ii) Planckian spectrum (dotted line) with the same CCT as that of Dev.5 (4974K). [Figure 13] Emission spectrum, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.6 (solid line) and (ii) Planckian spectrum (dashed line) with the same CCT as that of Dev.6 (4042K). [Figure 14] Emission spectrum, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.7 (solid line) and (ii) solar spectrum of the same CCT as that of Dev.7 (5010K) (dashed line). [Figure 15] Emission spectrum, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.8 (solid line) and (ii) Planckian spectrum (dashed line) at the same CCT as Dev.8 (3949K). And [Figure 16] Simulated emission spectra, normalized intensity (normalized to CIE 1931 XYZ relative luminance Y=100) versus wavelength (nm) for (i) Dev.9 (thick solid line), (ii) Com.4 (dashed line), and (iii) solar spectrum of the same CCT as that of Dev.9 (6535K) (dotted line). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The embodiments of the present invention are provided as exemplary embodiments of the present invention to enable those skilled in the art to practice the present invention. The present invention will now be described in detail with reference to the drawings, which are provided as illustrative embodiments. The examples are not meant to limit the scope of the invention to a single embodiment, but rather to be illustrative, Other embodiments are possible by replacing some or all of the illustrated elements. In some cases, certain elements of the invention may be implemented in part or in whole using known components. Only those portions of such known components necessary for understanding the present invention are described, and such known components are not necessarily Detailed descriptions of other parts of the knowledge component are omitted to avoid obscuring the content. In this regard, embodiments depicting elements in the singular should not be construed as limiting. Rather, the present invention relates to a plurality of identical components, unless expressly stated otherwise herein. In addition, the present invention is intended to encompass other embodiments that include Unless expressly stated to be so, any term in the specification or claims may be used interchangeably. It is not intended to be construed as being general or specific. The invention encompasses, by way of example only, present and future known equivalents of known components referred to herein. Includes:

[0027] Throughout this specification, like reference numbers are used before the figure numbers to denote like features. Use.

[0028] An embodiment of the present invention is a broadband blue excitation light emitting diode having a dominant wavelength in the range of 420 nm to 480 nm. A broadband solid-state excitation source operable to generate excited light, e.g., a white light source including one or more LEDs. In this patent specification, "broadband" blue light is defined as light having a wavelength of at least 25n m, preferably at least 30 nm FWHM (Full Width Half Maximum) or in the wavelength range of 420 nm to 480 nm. Used to describe blue light that consists of a combination of blue emissions of at least two different wavelengths. More specifically, but not exclusively, embodiments of the present invention may be used to generate solar radiation that mimics sunlight. The present invention relates to a white light-emitting device for generating full-spectrum white light with high color rendering properties. Embodiments of the present invention also include a method for detecting blue light (HEV) in the range of 400-500 nm. This improves the issue of high narrow-band blue intensity causing damage to the human eye. The present invention also relates to a solid state white light emitting device having a broadband blue spectral content.

[0029] Remote phosphor full spectrum white light emitting device

[0030] 1a and 1b show a remote phosphor solid-state full spectrum white light emitting device according to one embodiment of the present invention. 1 shows an optical device, in which FIG. 1a is a partial cross-sectional plan view and FIG. 1b is a cross-sectional view through AA. The device 110 supports a CCT (correlated color temperature) of 2500K to 5000K and a CCT of over 95. This device is designed to produce a warm white light with a CRI (color rendering index) that is The light may be used alone or may be part of a downlight or other lighting arrangement. The device 110 includes a disk-shaped base 114, a hollow cylindrical wall portion 116, and a removable The heat dissipation device includes a hollow cylindrical body 112 having a removable annular top 118. To achieve this, the base 114 is preferably made of aluminum, an aluminum alloy, or a material with high thermal conductivity. The base 114 is attached to the base 114 by screws or bolts. or other fasteners, or by adhesive, to the wall portion 116. do.

[0031] The device 110 is a circular MCPCB (metal core printed circuit board). 1a and 1b, a plurality of thermally conductive printed circuit boards (PCBs) 122 are mounted in thermal communication with the The broadband blue solid-state excitation source 120 further includes five (5) broadband blue solid-state excitation sources 120. A suitable embodiment is shown in Figures 2a-4b. To maximize light emission, the device 10 has a Light reflecting surfaces 124 and 126 cover the surface of the CPCB 122 and the inner curved surface of the cylindrical wall 116, respectively. 26.

[0032] The device 110 is located remotely to an excitation source 120 and is configured to generate They absorb a portion of the excitation light and convert it into light of a different wavelength through the process of photoluminescence. The photoluminescence wavelength conversion component 128 further comprises a photoluminescence wavelength conversion component 128 operable to convert the The light emission product of the device 110 is a composite light generated by a broadband blue excitation source 120 and a fluorescent photoluminescent light generated by the photoluminescent wavelength converting component 128; and The photoluminescent wavelength-converting component comprises yellow, red, and / or green phosphors. Light-transmitting materials, including mixtures (e.g., polycarbonate, acrylic materials, silicone materials) In addition, in embodiments, the photoluminescence wavelength converting element may be formed of The element may be formed from a light-transmissive substrate that is coated with a phosphor material(s). The wavelength conversion component 128 is located remotely relative to the excitation source 120 and receives the excitation light from the excitation source. Spatially separated. In this patent specification, "remotely" and "remote" mean spaced apart or Separate means separate. Typically, the wavelength converting component and the excitation source are separated by air. In other embodiments, they may be made of, for example, a light-transmitting silicone or epoxy material. The wavelength converting component 128 may be separated by a suitable optically transmissive medium, such as: The housing is arranged so that all light emitted by the lamp passes through wavelength components 128. As shown, the wavelength converting component 128 is configured to completely cover the aperture. The lamp may be removably attached to the top of the wall portion 116 using a top portion 118. The components and color of the light emitted can be easily changed.

[0033] FIG. 2a is a schematic diagram of a broadband blue solid-state excitation source 220 according to one embodiment of the present invention. The blue solid-state excitation source 220 emits light in the range of 420 nm to 470 nm, i.e., in the visible spectrum. The device is configured to generate broadband blue excitation light having a dominant wavelength within the blue region of the filter. In this embodiment, the FWHM is also in the range of 25 nm to 50 nm. According to the present invention, the broadband blue solid-state excitation source 220 includes a first solid-state light source 230 and a second solid-state light source 231. 32, which in this embodiment is a narrowband blue LED chip (e.g., a blue-emitting GaN The first solid-state light source 230 is a 420 nm to 470 nm LED chip. First dominant wavelength λ d1 and the second solid-state light source 232 produces blue light having a wavelength of 420 nm to Second dominant wavelength λ within 470 nm d2 The first and second Solid-state light sources vary in the dominant wavelength of the light generated by the source (i.e., λ d1 is λ d2 and The combination of light from the first and second solid-state light sources 230 / 232 is selected to be different. The combination constitutes the broadband blue excitation light output 242 of the broadband blue solid-state excitation source 220, and It has a dominant wavelength in the range of 1000 nm to 470 nm and a FWHM in the range of 25 nm to 50 nm. It will be appreciated that in other embodiments, the solid state excitation source may include a single solid state light source. As used herein, a single solid-state light source is defined as one or more solid-state light sources, which Each of these light sources has the same (i.e., single) dominant wavelength and is at least 25n The gyro generates light having a FWHM of 1.0 m.

[0034] As shown in FIG. 2a, the broadband blue solid-state excitation source 220 includes first and second solid-state light sources. A LED package, e.g., SMD 2835, is flip-chip bonded to the top surface of the board 234. Includes surface mountable devices (SMD) such as cages Electrical contacts 236, 238 are provided on the bottom surface of the substrate 234 for operating the excitation source. The first and second solid-state light sources 230, 232 can be provided in a silicon substrate. Alternatively, it may be encapsulated with a light-transmitting optical encapsulant 240 such as an epoxy material.

[0035] FIG. 2b is a schematic diagram of a broadband blue solid-state excitation source 220 according to one embodiment of the present invention. The excitation source 220 emits radiation in the range of 420 nm to 470 nm, i.e., in the blue region of the visible spectrum. In this embodiment, the excitation light has a dominant wavelength within the range of 2 It also has a FWHM in the range of 5 nm to 50 nm. The source 220 includes a broadband solid-state light source 241, which in this example is, e.g., 75, 1494 (1999), Tran C. et al., “Growth of I nGaN multiple-quantum-well blue light-em itting diodes on silicon of metal organi As disclosed in "C Vapor Phase Epitaxy," multiple quantum wells (MQ A single broadband LED, such as an InGaN / GaN blue LED, having an active region with The broadband solid-state light source 241 emits a plurality of light beams having peak wavelengths in the range of 420 nm to 470 nm. Thus, the single solid-state light source 24 produces broadband blue light that includes overlapping blue emissions of 1. Generate light with a single / single dominant wavelength and with a FWHM of at least 25 nm do.

[0036] As shown in FIG. 2b, the solid-state excitation source 220 is a solid-state light source flip-type light source mounted on top of a substrate 234. Chip bonded, e.g. surface mountable for SMD 2835 LED packages The electrical contacts 236, 238 may include a semiconductor device (SMD). The solid-state light source 241 may be provided on the bottom surface of the substrate 234 to provide a solid-state light source. It can be encapsulated with a light-transmitting optical encapsulant 240 such as a ricone or epoxy material.

[0037] Packaged full spectrum white light emitting device

[0038] FIG. 3a illustrates a packaged full spectrum white light emitting device 3 according to one embodiment of the present invention. The device 310a is a schematic cross-sectional view of the device 310a. Color temperature with CT (correlated color temperature) and general CRI (color rendering index) CRI (Ra) of 95 or higher It is configured to produce white light.

[0039] According to an embodiment of the present invention, device 310a includes a casing 344, For example, the first blue-emitting GaN (gallium nitride) LED chips and a broadband blue solid-state excitation source composed of a second solid-state light source 330, 332. Similarly, the first solid-state light source 330 has a first dominant wavelength in the range of 420 nm to 470 nm. Long λ d1 and the second solid-state light source 332 can produce blue light having a wavelength of 420 nm Second dominant wavelength λ in the range of ~470 nm d2 A blue emission having the following formula can be produced. Dominant wavelength λ of the first solid-state light source d1 is the dominant wavelength λ of the second solid-state light source d2 Package 3, for example, an SMD 2835 LED package including a top portion 346 and a base portion 348. The upper body portion 346 may include any surface mountable device (SMD). The package 3 defines a recess 350 configured to receive the sources 330, 332. 44 further includes electrical connectors 352 and 354 on the exterior surface of the base of the package 344. The electrical connectors 352, 354 are connected to electrode contact pads 356 on the floor of the recess 350. , 358, and 360. Using adhesive or solder, Solid state light sources (LED chips) 330, 332 are mounted on thermally conductive pads located on the floor of the recess 350. The electrode pads of the LED chip can be attached to the bond wires 362. 3, corresponding electrode contact pads 356, 358, and 360 on the floor of package 344. Alternatively, the LED chip can be flip-packaged The recess 350 can accommodate the LED chips 330, 333 and electrically connected to the LED chips 330, 333. 2 such that the exposed surface of the substrate is coated with the photoluminescent / silicone material mixture. A light-transmitting optical encapsulant 364 containing a mixture of photoluminescent materials, typically The recess is filled with optically clear silicone to enhance the luminous brightness of the device. The walls of 350 can be angled and have light reflecting surfaces. Of course, in other embodiments , one or more solid-state light sources (LED chips 330, 332) are each the same (i.e., single / single German) It is understood that light having a dominant wavelength and a FWHM of at least 25 nm is generated. It will be.

[0040] FIG. 3b is another embodiment of the present invention. The first and second narrowband solid-state light sources are Two broadband blue LEDs 341a / 341b with active regions having quantum wells are used. Similar to FIG. 3a, except that the first and second broadband blue The color solid-state light sources 341a / 341b each have the same dominant wavelength λ d Generates broadband blue excitation light with do.

[0041] 4a and 4b are diagrams illustrating a chip on board (CBO) circuit according to one embodiment of the present invention. 4a shows a COB (copper on board) packaged full spectrum white light emitting device 410, FIG. 4b is a plan view and FIG. 4b is a cross-sectional view through BB. Warm white with a CCT (correlated color temperature) of 000K and a CRI (color rendering index) of over 95 The light source is configured to generate light.

[0042] The device 410 is mounted in thermal communication with a square MCPCB 468. A plurality (12 in the example of FIG. 4a) of broadband blue solid-state excitation sources 420, e.g., broadband blue light-emitting G Includes aN (gallium nitride) based LED flip chip die.

[0043] As shown in FIG. 4a, the excitation sources 420 may be configured in a generally circular array. The solid-state excitation sources (broadband LED dies) 420 each emit light in the range of 440 nm to 455 nm. Dominant wavelength λ d In this embodiment, excitation light having a wavelength of 25 nm to 5 1. The white light emitting device 410 has a FWHM within the range of 100 nm. To this end, electrical contacts 472, 474 may be provided on the top surface of the MCPCB 468. As shown, the broadband LED flip chip die 420 has an exposed surface of the LED die 420. The photoluminescent / silicone material mixture is then applied to the photoluminescent A light-transmitting optical encapsulant 466, such as silicone or elastomeric, containing a mixture of sensing materials. As shown in the figure, the light-transmitting encapsulant / photoluminescent material The mixture 466 may be contained within an annular wall 470. Of course, in other embodiments, The arrangements shown in Fig. 4a and 4b show a single broadband InP semiconductor laser with an active region having multiple quantum wells. Solid-state pump source consisting of two or more LEDs, not GaN / GaN blue LEDs4 It will be understood that the number of digits may include 20.

[0044] Green to yellow photoluminescent materials

[0045] In this specification, a green to yellow photoluminescent material is a material having an emission wavelength of about 490 nm to about 55 Peak emission wavelengths (λ ) within 0 nm, i.e., in the green-yellow region of the visible spectrum. p e ) is a material that produces light having a green to yellow photoluminescence. The material has a wide emission characteristic, preferably with a FWHM (full width at half maximum) of -100 nm or more. The green to yellow photoluminescent material is, for example, a garnet-based inorganic phosphor material, Any photoluminescent material, such as silicate phosphor materials and oxynitride phosphor materials Examples of suitable green to yellow phosphors are shown in Table 1.

[0046] In some embodiments, the green-yellow photoluminescent material is of general composition Y3 ( Al,Ga)O 12 Cerium-activated yttrium aluminum garnet phosphor:Ce (YAG), for example, with a peak emission wavelength in the range of 527 nm to 543 nm and 12 Intematix Corporation (Fremo) Examples of phosphors include the YAG series manufactured by Honda Motor Co., Ltd. In the fine print, the notation YAG# indicates the type of phosphor - YAG type phosphor, followed by the number followed by the peak emission wavelength in nm (#). For example, YAG535 has a peak emission wavelength of 535 nm. The green to yellow photoluminescent material is a YAG phosphor with a peak emission wavelength. General composition (Y,Ba)3(Al,Ga)5O 12 Cerium-activated yttrium aluminium Ce(YAG) phosphors, e.g. Intematix C GNYA manufactured by corporation (Fremont California, USA) In some embodiments, green photoluminescent phosphors include G series phosphors. The material has the general composition Lu3Al5O 12 Aluminate (LuAG) phosphor: Ce(GA Examples of such phosphors include those having a wavelength of 516 nm to 560 nm. and FWHM of 120 nm. GAL series manufactured by ration (Fremont California, USA) In this specification, the notation GAL# indicates the type of phosphor (GAL)- Describes a phosphor of the LuAg family, followed by its peak emission wavelength in nanometers (#). Examples For example, GAL520 refers to the GAL fluorophore having a peak emission wavelength of 520 nm.

[0047] Examples of green to yellow silicate phosphors include those with peaks in the range of 507 nm to 570 nm. A typical composition (Ba, Sr) with an emission wavelength and FWHM of about 70 nm to about 80 nm. Europium-activated orthosilicate phosphors of 2SiO4: Eu, e.g., Intemat Manufactured by ix Corporation (Fremont California, USA) G, EG, Y, and EY series phosphors. In some embodiments, green ~Yellow phosphors are disclosed in U.S. Patent No. 8,679,367, entitled "Green-Emi tting(Oxy)Nitride-Based Phosphors and Li The same is taught in the "Light Emitting Devices Using the Same" and the like, which are incorporated herein in their entirety. Such green-emitting oxynitride (ON) phosphors have the general composition Eu 2+ M 2+ Si4Al 0 x N (7-2x / 3) where 0.1≦x≦1.0 and M 2+ is Mg, The divalent metal is at least one selected from the group consisting of Ca, Sr, Ba, and Zn. In the fine print, the notation ON# denotes the type of phosphor (oxynitride) followed by nanomate. Peak emission wavelength (λ pe For example, ON495 is the 495 nm 1 shows a green oxynitride phosphor having peak emission wavelengths.

[0048] [Table 1]

[0049] Orange to red photoluminescent materials

[0050] Orange to red photoluminescent materials can be excited by blue light and emit light at wavelengths of about 600 nm. Peak emission wavelength λ ranges from 670 nm to approximately 670 nm pe and operable to emit light having , which may include any orange to red photoluminescent material, typically a phosphor. , for example, europium-activated silicon nitride phosphors, α-SiAlON, Group I It can contain IA / IIB sulfide selenide based phosphors or silicate based phosphors. Orange Examples of red phosphors are shown in Table 2.

[0051] In some embodiments, the europium-activated silicon nitride based phosphor has the general formula Ca Calcium aluminum nitride phosphor (CASN) of AlSiN3:Eu 2+ Includes: C ASN phosphors include strontium (Sr), with the general formula (Sr,Ca)AlSiN3:Eu 2+ In this specification, the notation CASN# means The type of phosphor (CASN) is indicated, followed by the peak emission wavelength in nanometers (#). λ pe For example, CASN615 is an orange-colored compound with a peak emission wavelength of 615 nm. ~shows a red CASN phosphor.

[0052] In one embodiment, the orange - red phosphor can include an orange - red emitting phosphor as taught in U.S. Patent No. 8,597,545, entitled "Red - Emitting Nitride - Based Calcium - Sta bilized Phosphors". Such a red - emitting phosphor can include a nitride - based composition represented by the chemical formula M Sr a Sr b Si c Al d N e Eu f wherein M is Ca, 0.1 ≦ a ≦ 0.4 ; 1.5 < b < 2.5; 4.0 ≦ c ≦ 5.0; 0.1 ≦ d ≦ 0.15; 7.5 < e < 8. 5; and 0 < f < 0.1; wherein a + b + f > 2 + d / v, and v is the valence of M.

[0053] Alternatively, the orange - red phosphor can include an orange - red emitting nitride - based phosphor as taught in U.S. Patent No. 8,663,502, entitled "R ed - Emitting Nitride - Based Phosphors", and the entire content is incorporated herein by reference. A red - emitting phosphor comprising a nitride - based composition represented by the chemical formula M M (x / v) M ’ 2Si 5-x Al x N8:RE, wherein M is at least one monovalent metal, divalent metal, or trivalent metal having a valence v, M is at least one of Mg, Ca, Sr, Ba, and Zn, ’ RE is at least one of Eu, Ce, Tb, Pr, and Mn, wherein x satisfies 0.1 ≦ x < 0.4, and the red - emitting phosphor is M​​’ It has the general crystal structure of 2Si5N8:RE, and Al is substituted for Si in the general crystal structure and M is located within the general crystal structure substantially in the interstitial lattice sites. An example of one such phosphor is the XR610 red nitride phosphor from Intematix Corporation, Fremont, California, USA, which has a peak emission wavelength of 610 nm

[0054] Orange to red phosphors can also include IIA / IIB group selenium sulfide-based phosphors A first example of a IIA / IIB selenium sulfide-based phosphor material has the composition MSe 1-x S x :E u wherein M is at least one of Mg, Ca, Sr, Ba, and Zn and 0 < x < 1.0. A specific example of this phosphor material is the CSS phosphor (CaSe1 -x S x :Eu). Details of the CSS phosphor are described in U.S. Patent Application Publication No. 2017 / 0145309, filed on September 30, 2016, which is co-owned and incorporated herein by reference in its entirety The CSS orange to red phosphors described in U.S. Patent Application Publication No. 2017 / 0145309 can be used in the present invention. The emission peak wavelength of the CSS phosphor can be adjusted from 600 nm to 6 50 nm by changing the S / Se ratio in the composition, and has a narrow-band red emission spectrum with an FWHM within the range of about 48 nm to about 60 nm (longer peak emission wavelengths typically have larger FWHM values ). In this specification, the notation CSS# refers to the type of phosphor (CSS ​​​​​​) followed by the peak emission wavelength in nanometers (#). For example, CSS61 5 shows a CSS phosphor with a peak emission wavelength of 615 nm. In addition, the CSS phosphor particles may be made of one or more oxides, such as aluminum oxide (Al 2O3), silicon oxide (SiO2), titanium oxide (TiO2), zinc oxide (ZnO), acid Magnesium oxide (MgO), zirconium oxide (ZrO2), boron oxide (B2O3), Alternatively and / or additionally, it may be coated with chromium oxide (CrO). The narrow band red phosphor particles may be made of one or more fluorides, such as calcium fluoride (CaF 2) Magnesium fluoride (MgF2), zinc fluoride (ZnF2), aluminum fluoride It may be coated with AlF3, or titanium fluoride (TiF4). The coating may be a single layer or may be a combination of multiple layers of the above coatings. The combination coating may have an abrupt transition between the first and second materials. or a gradual / smooth transition from the first material to the second material. may be a coating in which there is a The resulting mixture forms a zone having a mixed composition.

[0055] In some embodiments, the orange-red phosphor is selected from the group consisting of those described in U.S. Pat. No. 7,655,156, The name of the invention is "Silicate-Based Orange Phosphors". As shown, orange-emitting silicate-based phosphors can be included. Photosilicic acid phosphors have the general composition (Sr 1-x M x ) y EU z Having SiO5 In the formula, 0 <x≦0.5、2.6≦y≦3.3、0.001≦z≦0.5であり、M is one or more divalent metals selected from the group consisting of Ba, Mg, Ca, and Zn. In this specification, the notation O# denotes the type of phosphor (orange silicate), followed by the nanometer. Peak emission wavelength (λ) at 1000 Hz pe For example, O600 is the concentration at 600 nm. 1 shows an orange silicate phosphor having a peak emission wavelength. [Table 2]

[0056] Broadband blue solid-state excitation source

[0057] As described above, and in accordance with some embodiments of the present invention, a broadband blue solid-state excitation source comprises: It may include solid state light sources (eg, LEDs) of two or more different dominant wavelengths.

[0058] FIG. 5a shows the plot of the luminance vs. wavelength (nm) for a 454.4 nm narrowband LED (prior art). The measured emission spectrum, normalized intensity (au), is shown in Fig. 5b. d1 =45 2nm and λ d2 The present invention includes a combination of two LEDs with a dominant wavelength of 462 nm. Measured emission spectrum versus wavelength (nm) for a broadband blue solid-state excitation source using , normalized intensity (au). Both emission spectra (Figures 5a and 5b) are It can be seen that the two peaks show single maximum peaks 580 and 582. When LEDs with two different dominant wavelengths are used in combination, compared to LEDs with longer wavelengths, It can be seen visually that the FWHM increases when the The dominant wavelength (λ d1= 452 nm and λ d2 A combination of LEDs with In the case of a broadband blue solid-state excitation source according to the present invention, the main wavelength of the excitation light generated by the light source is The length is 454.2 nm with a FWHM of about 28 nm. A single narrowband LED with the same dominant wavelength (454.4 nm) has a FWHM of only 17 nm. As described below, the optical performance of the light emitting device according to the present invention is The increase in the FWHM of the pump light (i.e., 17 nm to 28 nm) advantageously leads to an improvement in .

[0059] In a further embodiment, the broadband blue solid-state excitation source is a solid-state excitation source having three or more distinct dominant wavelengths. FIG. 6 shows a light source (e.g., LED) having two different dominant wavelengths λ d1 = 446nm and λ d2 = 463 nm (solid line) and (ii ) Three different dominant wavelengths λ d1 = 448 nm, λ d2 = 453 nm, and λ d3 =461n m (dotted line), and a broadband blue excitation source according to the present invention. , the measured emission spectrum, normalized intensity (au) versus wavelength (nm). 6 is compared with an excitation source that includes a combination of LEDs with two different dominant wavelengths, This visually illustrates the effect of using a combination of LEDs with different dominant wavelengths. The dominant wavelength (λ d1 = 446 nm and λ d2 A combination of LEDs with For solid-state excitation sources including 458.7 nm, the dominant wavelength of the excitation light generated by the light source is 458.7 nm. It has a FWHM of 37.4 nm. However, as shown in Fig. 6, An excitation source containing an LED with different dominant wavelengths of 682 The FWHM of the excitation source corresponds to half the maximum peak. For comparison, a set of LEDs with three different dominant wavelengths is The excitation source, which includes the combination, produces excitation light having a dominant wavelength of 455.6 nm and a dominant wavelength of 29.3 nm. However, as shown in FIG. 6, it has three different dominant wavelengths. The excitation source, which includes an LED, generates excitation light whose spectrum exhibits a single peak 682. The single peak compared to the double peak indicates that the LED has a smaller wavelength range. i.e. 448nm-461nm compared to 446nm-463nm This may be due to the following.

[0060] As described above, and in accordance with some embodiments of the present invention, a broadband blue solid-state excitation source comprises: It can include one or more broadband blue solid-state light sources (e.g., MQW LED chips). 7 is a graph showing the relationship between the wavelength (nm) and the excitation wavelength for a broadband blue excitation source including a broadband MQW LED. The measured emission spectrum, normalized intensity (au) is shown. The MQW LED has nine The 2-well laser includes a quantum well and produces light having a FWHM of 34 nm, and thus is The FWHM range is 5 nm to 50 nm. As shown in Figure 7, the spectrum is divided into three different Three peaks that can be attributed to different quantum wells producing different peak wavelengths (blue emission) 782a, 782b, and 782c.

[0061] Remote phosphor white light emitting device test method

[0062] The remote phosphor test method is a remote phosphor white light emitting device in an integrating sphere (Figures 1a and 1b). The total emission of the light is measured.

[0063] The photoluminescent wavelength conversion component (128 - Figs. 1a and 1b) has a diameter of 61.5 mm. The device contains a circular borosilicate glass disk with a diameter of 1.5 mm. The phosphor material is supplied by Dow Coming. The mixture was mixed with chemical sealant OE6370 (silicone resin) and the resulting mixture was applied to one side of the glass disc. Apply as a layer to the surface and allow to cure.

[0064] The following nomenclature is used herein to describe remote phosphor light emitting devices. Com.# is a comparative light-emitting device in which each excitation source contains one or more solid-state light sources of a single dominant wavelength. Dev.# represents an embodiment of the invention in which each excitation source includes a solid-state light source of two different dominant wavelengths. The comparative light-emitting devices (Com.#) are 454.4 nm , including eight solid-state excitation sources containing 2835 packaged LED chips. Therefore, Co m.# includes a total of 8 LED chips. The light emitting device (Dev.#) according to the present invention is , six solid-state excitation sources (220 - FIG. 2a), each of which has a dominant wavelength λ d1 =452nm and λ d2 = Includes a 2835 package containing two 464nm LED chips. Therefore, Dev.# contains a total of 12 LED chips.

[0065] 2700K~3000K full spectrum white light emitting device

[0066] Table 4 shows a comparative device designated Com.1 and a far-field device according to the present invention designated Dev.1. Phosphor for full spectrum white light emitting device nominal 2700K light emitting device The composition is shown in the table.

[0067] As can be seen from Table 4, in terms of phosphor composition, Com.1 and Dev.1 are 1.1% by weight of ON495(Eu 2+ :M 2+ Si4AlO x N (7-2x / 3) - λ pe = 495 nm), 88.4 wt% GAL520 (Lu 3-x (Al 1-y Ga y )5O 12 :Ce x -λ Pe = 520 nm), 5.8 wt% O600 ((Sri x M x ) y EU z SiO5-λ pe = 600 nm) and 4.7 wt% CASN670 (Ca1 -x S rx AlSiN3:Eu-λ pe = 670 nm). As mentioned above, Com. 1 contains eight solid-state excitation LEDs, each containing a 454.4nm, 2835 packaged LED chip Origin, while Dev.1 has a dominant wavelength λ d1 = 452 nm and λ d2 =46 Six broadband blue solid-state excitation LEDs, including a 2835 package containing two 4nm LED chips Including origins.

[0068] [Table 3]

[0069] Tables 5, 6, and 7 show the measured values ​​for the light-emitting devices Com.1 and Dev.1. This table presents optical test data for different dominant wavelengths (λ d1= 452 nm and λ d2 A broadband blue solid state LED according to the present invention includes a combination of two or more solid state LEDs (.about.464 nm). When using an excitation source, a single dominant wavelength (λ d Solid-state LEDs including (454 nm) The impact on the optical performance of light-emitting devices is discussed in comparison with the case where the original material is used. From the table, it can be seen that device Dev.1 has (i) CRI R1 to CRI R15 each of which is 97 (ii) CRI R11 ("saturated green") is 98.9 compared to 97.9 and (iii) CRI R12 ("saturated blue") increased from 91.9 to 97.5. (iv) the general color rendering index CRI Ra increased significantly from 98.1 to 99.0. (v) The color rendering index CRI Rall (average of RI to R15) increased to 97.5. (vi) IEC TM-30 fidelity index R f to 96.4 Note that the present invention produces white light with a significant increase in the luminance of 97.6 compared to 1000 nm. This results in a significant increase in light quality (color rendering), but a small decrease in luminous efficiency (LE) of 1.8%. Dev.1 is 224.1lm / W opt It has a high luminous efficiency LE. Please note that:

[0070] [Table 4]

[0071] [Table 5]

[0072] [Table 6]

[0073] Figure 8 shows (i) Dev.1 (thick solid line), (ii) Com.1 (dashed line), (iii) D Planckian spectrum (thin solid line) with the same CCT as that of ev.1 (2701K), and and (iv) the Planckian spectrum (point) of the same CCT as that of Com.1 (2768 K). The normalized intensity versus wavelength (nm) for each line is shown. To achieve this, each spectrum is calculated using the CIE 1931 XYZ relative luminance Y=100. The data are normalized to the CIE standard observer, which takes into account the photopic response of the observer. The Planckian spectrum (curve 1931) in Fig. 8 is normalized using the luminosity function y(λ). ) or blackbody spectrum is a common CR equal to 100 for a given color temperature (CCT). Therefore, a white light-emitting device of a given color temperature is as bright as possible. To have the best color rendition possible, its emission spectrum must be similar to that of a blackbody of the same color temperature. It is necessary to be as consistent as possible.

[0074] Referring to FIG. 8, a comparative device (i.e., an excitation light source including a solid-state light source having a single dominant wavelength) The device according to the invention (i.e., two solid-state The most significant effect of broadband blue excitation sources (including light sources) on the emission spectrum energy content However, (i) a reduction in the intensity of the blue emission peak 882, and (ii) a decrease in the spectrum at about 480 nm. Note the decrease in the trough 884 in the cyan region of the galaxy. Thus, the blue emission peak of Dev.1 is 80 (compared to peak 880 of Com.1). The reduction in 82 and the decrease in trough 884 make the spectrum more similar to the Planckian spectrum, i.e. This results in an emission spectrum that more closely resembles natural light. The spectral enhancement due to the use of a broadband blue excitation source including two solid-state light sources with long (blue) emission wavelengths. This change in torrent energy content partially fills the trough in the cyan region of the spectrum, The excellent color rendering of the device of the invention, in particular CIE CRIR 11 and CRI R12, General CRI Ra and IEC TM-30 Fidelity Index R f This is thought to explain the increase can be obtained.

[0075] A further advantage of the present invention is that the white light emitting device according to the present invention has a wavelength range of 400-500 nm. By reducing high-energy visible (HEV) blue light at 1000 nm, The damage to the plaque can be reduced or possibly prevented. Blue peak 880 (Com The blue photon energies (area under the peak) of 882 (Dev.1) and 882 (Dev.2) are virtually the same. However, in the case of peak 882, this energy is distributed over a larger wavelength range. 882, thereby reducing the intensity of the blue peak compared to peak 882. The white light emitting devices of the present invention exhibit a reduction in the blue emission peak (i.e., HEV). Therefore, the potential for damage to the human retina and the potential for macular degeneration in humans is reduced or prevented. will be done.

[0076] 3500K~4000K light emitting device

[0077] Table 8 shows the results for a comparative device designated Com.2 and a remote control device according to the present invention designated Dev.2. Tabulates phosphor compositions for nominal 3800K light emitting devices. That is why.

[0078] As can be seen from Table 8, in terms of phosphor composition, Com.2 is 93.1 wt.% G AL520(Lu 3-x (Al 1-y Ga y )5O 12 :Ce x -λ pe =520nm) , 2.4 wt% of CASN628(Ca 1-x Sr x AlSiN3:Eu-λ pe =62 8 nm), and 4.5 wt.% of CASN670 (Ca 1-x Sr x AlSiN3:Eu- λ pe = 670 nm), whereas Dev.2 is 93.5 wt% GAL520, 2.3 % by weight of CASN 628, and 4.2% by weight of CASN 670. The om.2 has eight LEDs, each containing a 454.4nm, 2835 packaged LED chip. 2 each includes a solid-state excitation source having a dominant wavelength λ d1 = 452 nm and λ d2 = 6 broadband blue lights, including 2835 packages containing 2 LED chips at 464nm Includes a solid-state excitation source.

[0079] [Table 7]

[0080] Tables 9, 10, and 11 show the measurement optical tests for the light-emitting devices Com.2 and Dev.2. The data is tabulated and is shown for a single dominant wavelength (λ d Including solid-state LEDs (454 nm) Compared with the case using the excitation, the different dominant wavelength (λ d1 = 452 nm and λ d2 =464n m) using a broadband blue excitation source according to the present invention comprising a combination of two or more solid-state LEDs; These tables explain the effect on the optical performance of light-emitting devices when Dev.2 is (i) CRI R1 to CRI R15 are each 90 or more, and (ii) (ii) there is an increase in CRI R11 ("saturated green") of 97.2 compared to 97.0; There is a significant increase in CRI R12 ("saturated blue") to 91.0 compared to 85.3, ( ii) IEC TM-30 Fidelity Index R f A big increase of 96.9 compared to 95.4 Note that the present invention produces white light with a good color rendition. This results in a large increase in the luminous efficiency LE, but the luminous efficiency LE does not decrease. Rather, the luminous efficiency LE is 0.3 % increase, and Dev.2 is 256.0lm / W opt The high luminous efficiency (LE) Note that the

[0081] [Table 8]

[0082] [Table 9]

[0083] [Table 10]

[0084] Figure 9 shows (i) Dev.2 (thick solid line), (ii) Com.2 (dashed line), (iii) D Planckian spectrum (thin solid line) with the same CCT as that of ev.1 (3867K), and and (iv) Planckian spectrum (point) of the same CCT as that of Com.1 (3810 K). 9 shows the normalized intensity versus wavelength (nm) for the comparative device. In comparison with an excitation source that includes a solid-state light source having a single dominant wavelength, the present invention A broadband blue solid-state pump device (i.e., a device that includes two solid-state light sources with different dominant wavelengths) The most significant effect on the emission spectrum - the spectral energy content - of the photon source is (i) (ii) a reduction in the intensity of the blue emission peak 982, and (ii) a shift in the spectrum at about 480 nm. Note the decrease in the trough 984 in the Anne region. As can be seen, Reduction and Trac of the blue emission peak 982 of Dev.2 (compared to peak 980 of Dev.2) The reduction in F-984 makes the spectrum more similar to the Planckian spectrum, i.e. more similar to natural light. In this embodiment, the emission spectrum is obtained by using a different dominant wavelength (blue emission). The spectral energy content resulting from the use of a broadband blue excitation source that includes two solid-state light sources This change partially fills in the trough in the cyan region of the spectrum and accounts for the superiority of the device of the present invention. Excellent color rendering, especially CRI R12, typical CRI Ra, and IEC TM-30 fidelity degree index R f This is thought to explain the increase in

[0085] A further advantage of the present invention is that the white light emitting device according to the present invention has a wavelength range of 400-500 nm. By reducing high-energy visible (HEV) blue light at 1000 nm, The damage to the plaque can be reduced or possibly prevented. Blue peak 980 (Com The blue photon energies (area under the peak) of 982 (Dev.2) and 982 (Dev.2) are virtually the same. However, in the case of peak 982, this energy is distributed over a larger wavelength range. 982, thereby reducing the intensity of the blue peak compared to peak 982. The white light emitting devices of the present invention exhibit a reduction in the blue emission peak (i.e., HEV). Therefore, the potential for damage to the human retina and the potential for macular degeneration in humans is reduced or prevented. will be done.

[0086] 4200K~4500K light emitting device

[0087] Table 12 shows a comparison device designated Com.3 and a device according to the present invention designated Dev.3. Tabulated phosphor compositions for a nominal 4200K light emitting device for remote phosphor light emitting devices It is something.

[0088] As can be seen from Table 12, with respect to the phosphor composition, Com.3 is 93.4 wt. % G AL520, 2.3 wt% CASN628, and 4.3 wt% CASN670 , while Dev.3 is 93.5 wt% GAL520, 2.3 wt% CASN628 %, and 4.2 wt.% CASN 670. As mentioned above, Com.3 contains 45 Contains eight solid-state excitation sources, including 4.4nm 2835 packaged LED chips, while , Dev.3, each of which has a dominant wavelength λ d1 = 452 nm and λ d2 = 464 nm Contains six broadband blue solid-state excitation sources, including 2835 packages containing ED chips.

[0089] [Table 11]

[0090] Tables 13, 14, and 15 show the optical test results for the light-emitting devices Com.3 and Dev.3. The experimental data is tabulated for a single dominant wavelength (λd Includes solid-state LEDs (454 nm) Compared to using excitation at a different dominant wavelength (λ d1 = 452 nm and λ d2 =464 When using a broadband blue excitation source that includes a combination of two or more solid-state LEDs with The impact on the optical performance of the light-emitting device is explained. From these tables, the device Dev.3 (i) each of CRI R1 to CRI R15 is 90 or more; and (ii) CRI R 12 ("saturated blue") has a significant increase of 90.1 compared to 82.3, and (iii) I EC TM-30 Fidelity Index R f There is a significant increase in white, 96.4 compared to 94.7. Note that the light produced by the 3D printer is 100% pure white light. Furthermore, the present invention provides a significant increase in the quality of the light (color rendition). However, there is only a small reduction in the luminous efficiency (LE) (0.9%), and the device is 254.6 lm / W opt It should be noted that the luminous efficiency is as high as 1.0.

[0091] [Table 12]

[0092] [Table 13]

[0093] [Table 14]

[0094] Figure 10 shows (i) Dev.3 (thick solid line), (ii) Com.3 (dashed line), (iii) Planckian spectrum (thin solid line) with the same CCT as that of Dev.3 (4172K). and (iv) the Planckian spectrum with the same CCT as that of Com.1 (4173 K). 10 shows the normalized intensity versus wavelength (nm) for the 100 nm to 150 nm 100 nm 15 ... In comparison to devices (i.e., excitation sources that include solid-state light sources having a single dominant wavelength), the present invention A device according to (i.e., a broadband blue excitation light source including two solid-state light sources with different dominant wavelengths) The most significant effect on the emission spectrum - the spectral energy content - of the photon source is (i) (ii) a reduction in the blue emission peak 1082, and (ii) a cyan emission peak at about 480 nm in the spectrum. Note the reduction in the trough 1084 of the region. As can be seen, (Com Reduction of the blue emission peak 1082 of Dev.3 (compared to peak 1080 of Dev.3) and The reduction in Raf 1084 has resulted in the emission spectrum, which closely resembles the Planckian spectrum. In this embodiment, a broadband blue excitation light source including two solid-state light sources having different dominant wavelengths is used. This change in spectral energy content due to the use of the source is the basis for the superiority of the device of the present invention. Color rendering, especially CRIR12 and IEC TM-30 fidelity index R f This explains the increase in It is thought that this is the case.

[0095] As with other embodiments of the present invention, an additional advantage of the full spectrum white light of the present invention is the wavelength By reducing high-energy visible (HEV) blue light in the region 400-500 nm and reduce or possibly prevent the potential for damage to the human retina and macula. The blue photon energy of the blue peaks 1080 (Com.3) and 1082 (Dev.3) The energy (area under the peak) is virtually the same. However, for peak 1082 , this energy is dispersed over a larger wavelength range, thereby resulting in a peak The intensity of the blue peak is reduced compared to that of 082. The potential for damage to the human retina due to the reduction in the peak (i.e., HEV) of and the likelihood of macular degeneration in humans is reduced or prevented.

[0096] Packaged White Light Emitting Device Test Method

[0097] The packaging test method is the measurement of the packaged white light-emitting device (Figure 3a) in an integrating sphere. This involves measuring the total emission.

[0098] The full spectrum white light emitting devices (Dev.#) packaged according to the present invention are 2835 (2.8mm x 3.5mm) containing solid-state light sources with two or three different dominant wavelengths The light emitting device Dev.4 according to the present invention has a dominant wavelength λ d1 =4 46nm and λ d2 = Two 1133 (11mil x 33mm) LED chips at 463nm The Dev.5 includes a 2835SMD package that contains a 1000-nm 2835 ... d1 =4 48nm, λ d2 = 453 nm, and λ d3 = 3 1133 LED chips at 461nm Includes 2835 SMD package containing

[0099] 5000K Packaged White Light Emitting Device

[0100] Table 16 shows the packaged white light emission according to the present invention, shown as Dev. 4 and Dev. 5. 1 tabulates the phosphor composition for the device's nominal 5000K light emitting device.

[0101] As can be seen from Table 16, in terms of phosphor composition, Dev.4 is 78.1 wt.% GAL520(Lu 3-x (Al 1-y Ga y )5O 12 :Ce x -λ pe =520nm ), 12.9 wt% GAL484(λ pe = 484 nm), and 9.0 wt.% CAS N650(Ca 1-x Sr x AlSiN3:Eu-λ pe = 650 nm), Dev .5 is 85.1% by weight of GAL520, 9.2% by weight of GAL484, and 0.5% by weight of CASN628(Ca 1-x Sr x AlSiN3:Eu-λ pe = 628 nm), and 5 0.2% by weight of CASN650. As mentioned above, Dev.4 has the same dominant wavelength λ d1 = 446 nm and λ d2 Contains two solid-state light sources (LEDs) with a wavelength of 463 nm. On the other hand, Dev.5 has the dominant wavelength λ d1 = 448 nm, λ d2 = 453 nm, and λ d3 = 461 nm.

[0102] [Table 15]

[0103] Tables 17, 18, and 19 show the packaged light-emitting devices Dev. 4 and Dev. 5. These data provide useful information about the present invention. The full spectrum white light emitting device is a device that emits light with different dominant wavelengths (λ d1 = 446 nm, and λd2 = 463 nm) or a combination of two solid-state light sources (LEDs) with different dominant wavelengths (λ d1 = 448 nm, λ d2 = 453 nm, and λ d3 = 461nm) solid-state LEDs This example illustrates that the blue solid-state excitation source may be configured with a broadband blue excitation source including a combination of:

[0104] From these tables, device Dev.4 has 267.4lm / W opt High luminous efficiency L (i) each of CRIR1 to CRIR15 is about 90 or more; and (ii) 99 (iii) has a high CRI R11 of 89.0 ("saturated green"); R12 ("saturated blue"), and (iv) a high general color rendering index CRI Ra of 98.0. (v) It has a high color rendering index CRI Rall (average of R1 to R15) of 97.1 (vi) High IEC TM-30 Fidelity Index R of 95.4 f Generate white light having Please note that.

[0105] From these tables, the device Dev.5 has a luminance of 268.5lm / W. opt High luminous efficiency L E, and (i) each of CRI R1 to CRI R15, excluding R12, is about 90 or more. (ii) has a high CRI R11 of 97.0 ("saturated green"); and (iii) has a CRI R11 of 97. (iv) has a high general color rendering index CRI Ra of 95.3; Rall (average of CRI R1 to R15) and a high IEC TM (v) of 92.3 -30 Fidelity Index R f Note that the white light produced has the following properties: 。

[0106] [Table 16]

[0107] [Table 17]

[0108] [Table 18]

[0109] Figure 11 shows (i) Dev.4 (thick solid line) and (ii) Dev.4 (4864K). Normalized intensity versus wavelength (nm) for the Planckian spectrum (thin solid line) of the same CCT. As can be seen from the figure, the spectrum (thick solid line) corresponds to the Planckian spectrum. Two prominent peaks are very similar and separated by a deep trough at about 450 nm. The combination of the two peaks 1182a and 1182b in the spectrum It corresponds to broadband blue excitation light in the cyan region (480 nm) and trough 1184. CRI The value of R12 is compared with the values ​​of CRI R1 to R11 and R13 to R15 (Tables 18 and 19). The reason why the total is low at 89.0 is because the difference in the dominant wavelength of the LEDs is too large (λ di =446nm and λ d2 =463nm-Δ λ d =17 nm), Planckian spectrum and trough This is thought to be due to the rotating trough 1186. Therefore, the value of CRI R12 is By reducing the difference in the dominant wavelengths of D, the difference can be increased to more than 90. ,(i) Dev.5 (thick solid line), and (ii) Dev.5 (4974K) Planckian spectrum of CCT (thin solid line) normalized to wavelength (nm) Each spectrum has a CIE 1931 XYZ relative luminance of Y=100. As can be seen, the spectrum (thick solid line) has a peak It exhibits a peak at 1282 and a trough at 1284, which closely resembles the Planckian spectrum.

[0110] Solid-state white light-emitting device including a broadband blue solid-state light source

[0111] The packaged white light emitting device according to the present invention, which includes a broadband LED chip, has a main wavelength of 1000 nm. Long λ d = 455.8 nm and FWHM 34 nm, single 2630 (26 mil x 30 1.5 mil) 239mW broadband LED chip die (MQW LED chip die) Contains cavity 2835 (2.8mm x 3.5mm) SMD package.

[0112] Table 20 shows the results of the nominal 4000K and 5000K tests according to the present invention, shown as Dev.6 and Dev.7. This table lists phosphor compositions for SMD packaged white light emitting devices at 1000K. be.

[0113] As can be seen from Table 20, in terms of phosphor composition, Dev.6 is 91.2 wt.% GAL520(Lu 3-x (Al 1-y Ga y )5O 12 :Ce x -λ pe =520nm ), 0.6 wt% of CASN628(Cai -x Sr x AlSiN3:Eu-λ pe =6 28 nm), and 8.2 wt.% CASN650 (Ca i-x Sr x AlSiN3:Eu -λ pe= 650 nm), and Dev. 7 contains 90.4 wt. % GAL520 and 8. Contains 6% by weight of CASN650.

[0114] [Table 19]

[0115] Tables 21, 22, and 23 show the packaged light-emitting devices Dev. 6 and Dev. 7. The measured optical test data of the device Dev.6 are shown in the table. 276.8lm / W opt (i) CRI R1 to CRI R (ii) a high CRI R11 of 98.9 ("saturated green"); ), (iii) a high R12 of 96.6 ("saturated blue"); and (iv) a high R12 of 98.6 (v) has a high general color rendering index CRI Ra of 98.3, and (v) has a high color rendering index CRI R of 98.3 (vi) high IEC TM- 30 Fidelity Index R f Note that the RGB color space produces white light with a RGB color space of 1000 x .... Vice Dev.7, 268.0lm / W opt (i) CR Each of I R1 to CRI R15 is about 95 or more, and (ii) a high CRI of 98.5 R11 ("saturated green"), and (iii) a high CRI of 97.2 R12 ("saturated blue"). "), (iv) a high general color rendering index CRI Ra of 98.8, and (v) a high color rendering index of 98. It has a high color rendering index CRI Rall (average of CRI R1 to R15) of 4, and (vi) High IEC TM-30 Fidelity Index R of 95.9 f Note that the white light produced has I want to 。Lower than the CRI R1-R8 and R10-R15 values ​​(Tables 22 and 23). The low R12 value of 94.7 may slightly reduce the luminous efficiency, but this can be improved by adjusting the phosphor composition. For example, by increasing the weight percent of CASN650, the content can be increased to 95 or more. It is possible.

[0116] [Table 20]

[0117] [Table 21]

[0118] [Table 22]

[0119] Figure 13 shows (i) Dev.6 (solid line) and (ii) Dev.6 (4042K). Normalized Planckian spectrum (dashed line) for the same CCT as As can be seen from the figure, the spectrum (thick solid line) is the Planckian spectrum. The troughs 1386a and 1386b are similar to those at about 450 nm and 460 nm, respectively. Three peaks 1382a, 1382b, and 1382c separated by 1386b These combinations provide broadband blue light in the cyan region of the spectrum (480 nm). The CRI R12 value corresponds to the CRI R1 to R11 and The value of R13 to R15 is 96.6, which is lower than the values ​​of R12 and R13 (Tables 22 and 23). The different wavelengths of blue light emitted by the different quantum wells in the chip allow This is thought to be due to the Nkian spectrum and the trough 1386b below the trough. CR The value of I R12 is determined by adjusting the quantum wells of the MQW LED chip to reduce the difference in blue emission. By configuring it, this can be increased to 98 or more.

[0120] Fig. 14 shows (i) Dev.7 (solid line) and (ii) Dev.7 (5010K). Normalized intensity versus wavelength (nm) for the solar spectrum (dashed line) with the same CCT as The solar spectrum is based on the CIE standard illuminant D55, below 4000K. It is a proportional mix from Planckian radiation to daylight with temperatures above 5500K. As can be seen, the spectrum (thick solid line) is very similar to the solar spectrum, with a Three troughs separated by troughs 1486a and 1486b at 460 nm, respectively. The combination of peaks 1482a, 1482b, and 1482c is Broadband blue excitation light in the cyan region of the spectrum (480 nm) and corresponding to trough 1484 As explained in relation to Dev.6 (Figure 13), the value of CRI R12 is The value of 97.2 is lower than the values ​​of R1 to R11 and R13 to R15 (Tables 22 and 23). The wavelengths of blue light emitted by the different quantum wells in the MQW LED chip are different. Therefore, it is considered to be due to the Planckian spectrum and the trough 1486b below the trough. The CRI R12 value is calculated by adjusting the MQW LED chip to reduce the difference in blue light emission. By constructing multiple quantum wells, the number can be increased to more than 98.

[0121] The spectra in Figures 13 and 14 are CIE 1931 XYZ relative luminance It is normalized to have Y=100. COB packaged white light emitting device containing broadband blue LED chip

[0122] The COB packaged white light emitting device according to the present invention is made of a broadband blue LED chip. , dominant wavelength λ d = 459.5 nm and FWHM 34 nm 2630 (26 mil x 30 m il) Contains 24 204mW broadband LED chip dies (MQW LED chip dies) Includes COB packages.

[0123] Table 24 shows the nominal 4000K COB packaging according to the present invention shown in Dev. 1 tabulates phosphor compositions for white light emitting devices.

[0124] As can be seen from Table 24, in terms of phosphor composition, Dev.8 is 88.1 wt.% GAL520(Lu 3-x (Al 1-y Ga y )5O 12 :Ce x -λ pe =520nm ) and 11.9 wt% CASN650(Ca 1-x Sr x AlSiN3:Eu-λ pe = 650 nm).

[0125] [Table 23] Tables 25, 26, and 27 show the measurement results for the COB packaged white light emitting device Dev.8. These tables show that the device Dev.8 has a ) Each of CRI R1 to CRI R15 is about 90 or more, and (ii) a high CRI of 96.1 (iii) a high CRI R12 ("saturated green") of 92.1; (iv) a high general color rendering index CRI Ra of 96.5; and (v) It has a high color rendering index CRI Rall (average of CRI R1 to R15) of 95.9, vi) High IEC TM-30 Fidelity Index R of 93.4 f generating white light having Furthermore, the solid-state white light emitting device according to the present invention can emit high quality (color rendering) white light. While generating 269.7lm / W opt It is noted that the luminous efficiency LE is also high. sea ​​bream.

[0126] [Table 24]

[0127] [Table 25]

[0128] [Table 26]

[0129] Fig. 15 shows (i) Dev.8 (solid line) and (ii) Dev.8 (3949K). Normalized Planckian spectrum (dashed line) for the same CCT as As can be seen from the figure, the spectrum (thick solid line) is the Planckian spectrum. The troughs 1586a and 1586b are at approximately 450 nm and 460 nm, respectively. Three peaks 1582a, 1582b, and 1582c separated by 1586b These combinations provide broadband blue light in the cyan region of the spectrum (480 nm). The CRI R12 value corresponds to the CRI R1 to R11 and The value of R13 to R15 is 96.2, which is lower than the values ​​of R14 to R15 (Tables 26 and 27). The different wavelengths of blue light emitted by the different quantum wells in the chip allow This is thought to be due to the Nkian spectrum and the trough 1586b below the trough. CR The value of I R12 is determined by adjusting the quantum wells of the MQW LED chip to reduce the difference in blue emission. By configuring it, this can be increased to 98 or more.

[0130] As can be seen from the figure, the spectrum (thick solid line) has three peaks 1582a, 1582 b, 1582c, and trough 1584, which closely resembles the Planckian spectrum. Each spectrum is calculated so that it has a CIE 1931 XYZ relative luminance of Y=100. It is normalized as follows:

[0131] The present invention relates to a full spectrum white light generating device for generating full spectrum white light with high color rendering quality. Although generated in relation to white light emitting devices, the light emitting devices according to the present invention include a broadband blue solid-state excitation source. The device may also be designed to produce light with a low CRI Ra, for example 70 or 80 or higher. In such applications, the use of broadband blue solid-state excitation sources is also beneficial. reduces damage to the human retina compared to known white LEDs that utilize narrowband blue excitation sources. This is because the same blue photon energy can reduce the amount of light emitted by the human eye and / or reduce macular degeneration in humans. The energy is dispersed over a higher wavelength range, thereby reducing the intensity of the blue peak. This is thought to be because

[0132] Tables 28, 29, and 30 are for a nominal 6500K, CRI Ra 80 light-emitting device. This is a table of simulated optical test data for Com.4 and Dev.9, with a single dominant wavelength ( λ d Compared to using excitation with a narrowband LED (=455 nm), three different Dominant wavelength (λ d1 = 443 nm, λ d2 = 455 nm, and λ d3 Narrow band (=468 nm) When using a broadband blue excitation source according to the present invention, which includes a combination of LEDs, From these tables, it can be seen that the device Dev.9 has the following characteristics: (i) (ii) there is an increase in CRI R11 ("saturated green") of 84.0 compared to 82.7; White with a significant increase in CRI R12 ("saturated blue") of 70.1 compared to 55.2 Note that the light produced by the OLED is 100% pure white light. Furthermore, the present invention provides an increase in the quality of the light (color rendering). However, the luminous efficiency LE was only reduced by 2.2%, and Dev.9 was 305.3lm / W opt It should be noted that the luminous efficiency LE is as high as

[0133] [Table 27]

[0134] [Table 28]

[0135] [Table 29]

[0136] FIG. 16 shows the results of (i) Dev.9 (thick solid line), (ii) Com.4 (dotted line), and (ii i) Solar spectrum (dashed line) with the same CCT as that of Dev.9 (6535K) Simulated emission spectrum, normalized intensity (CIE 1931 XY) versus wavelength (nm) (normalized to Z relative luminance Y=100).

[0137] Referring to FIG. 16, a comparative device (i.e., a solid-state light source having a single dominant wavelength) In comparison with the device according to the present invention (i.e., three fixed excitation sources with different dominant wavelengths), Emission Spectra of Broadband Blue Solid-State Excitation Sources (including Solid-State Light Sources) - Spectral Energy Content - The most significant effects on the blue emission peak are i) the broadening of the blue emission peak 1682 and (ii) the (iii) a reduction in the intensity of 1682 in the cyan region of the spectrum at about 490 nm Note the decrease in the trough 1684. As can be seen, (Com.4 The reduction and trough of the blue emission peak 1682 of Dev. 9 (compared to peak 1680 of The reduction of 1684 results in an emission spectrum that closely resembles the solar spectrum. In this embodiment, a broadband blue light source including three solid-state light sources with different dominant wavelengths (blue light emission) is used. This change in spectral energy content resulting from the use of an excitation source is the key advantage of the device of the present invention. The spectral shift explains the improved color rendering, especially the increase in CRI R11 and CRI R12. It is believed to partially fill the trough in the cyan region.

[0138] As mentioned above, a further advantage of the present invention is that the white light emitting device according to the present invention has a wavelength region By reducing high energy visible (HEV) blue light in the 400-500 nm range, that damage to the human retina and macula can be reduced or possibly prevented; The blue photon energy of the blue peaks 1680 (Com.4) and 1682 (Dev.9) The energy (area under the peak) is virtually the same. However, for peak 1682 , this energy is dispersed over a larger wavelength range, thereby resulting in a peak The intensity of the blue peak is reduced compared to 682. The potential for damage to the human retina due to a reduction in the peak (i.e., HEV) of the and reducing or preventing the likelihood of macular degeneration in humans.

[0139] In summary, broadband blue light consists of a combination of blue emissions of at least two different wavelengths. A light emitting device according to the present invention includes a broadband blue solid-state excitation source for generating excitation light. Superior performance compared to known devices that contain one or more narrowband solid-state light sources at wavelengths For example, a broadband blue solid-state excitation source may have two or more narrow A single band solid-state light source (e.g., LED), or one or more broadband solid-state light sources (e.g., different peaks) and an active region having a plurality of distinct quantum wells configured to produce blue light emission at wavelengths of 100 nm and 150 nm. Additionally, embodiments of the present invention may include LEDs having (i) a CRI of 90 or greater. R1 to CRI R15, (ii) CRI R11 above 90 ("saturated green"); (iii ) CRI R12 of 90 or more ("saturated blue"); (iv) CRI Ra of 95 or more; (v ) CRI Ra of 98 or higher, (vi) IEC TM-30 Fidelity Index R of 96 or higher f , ( vii) 220lm / W opt 25 or more of the luminous efficiency (LE) A full-spectrum white light generating device that generates white light having a color temperature in the range of 00K to 6500K. This allows for the implementation of spectral white light emitting devices.

[0140] Although the present invention has been particularly described with reference to certain embodiments thereof, the spirit and scope of the present invention Those skilled in the art will recognize that changes and modifications in form and detail may be made without departing from the scope of the present invention. If so, I hope it will be easily understood.

[0141] It is understood that the following items form part of the disclosure of the invention as defined herein: More specifically, the invention herein relates to a combination of features as detailed below. The term may be defined by a combination of features within the scope of the claims of this application. This provides a basis for correcting the combination. item 1. A full spectrum white light emitting device, comprising: A first photodiode that generates light having a peak emission wavelength in the range of 490 nm to 550 nm. The luminescent material produces light having a peak emission wavelength in the range of 600 nm to 680 nm. a second photoluminescent material comprising Excitation light with a dominant wavelength in the range of 420nm to 480nm and a FWHM of 30nm or more and a broadband solid-state excitation source operable to generate a full spectrum white light emitting device. Chair. 2. The excitation light is 30 nm to 50 nm, 35 nm to 50 nm, 40 nm to 50 nm, and Item 1, having a FWHM within a range selected from the group consisting of 45 nm to 50 nm. of full spectrum white light emitting device. It is characterized by producing white light with CRI R1 to CRI R15 of 3.90 or higher. Item 3. The full spectrum white light emitting device according to item 1 or 2. The lamp according to item 3, characterized in that it generates white light having a CRI Ra of 4.95 or more. A full spectrum white light emitting device. It is characterized by producing white light with a CRI R1 to CRI R15 of 5.95 or higher. 5. The full spectrum white light emitting device according to any one of items 1 to 4. Item 1 to 5 are characterized by generating white light having a CRI R12 of 6.90 or more. 6. The full spectrum white light emitting device according to any one of claims 5 to 5. 7. The light emitting device emits white light having a color temperature in the range of about 2500K to about 6500K. 7. The full spectrum white light emission according to any one of items 1 to 6, device. IEC TM-30 Fidelity Index R of 8.96 or higher f The present invention is characterized in that it produces white light having 8. The full spectrum white light emitting device according to any one of items 1 to 7. 9. Any of items 1 to 8, wherein the excitation light includes blue emission of at least two different wavelengths. 2. A full spectrum white light emitting device as described in claim 1. 10. A solid-state excitation source, Operated to generate blue light having a first dominant wavelength within the range of 420 nm to 480 nm. a first LED that can be activated; To generate a different blue emission having a second dominant wavelength within the range of 420 nm to 480 nm. and a second LED operable as described above. White light emitting device. 11. The blue solid-state excitation source comprises at least one blue emitter having two different wavelengths. and an LED having an active region with at least two different quantum wells each of which is formed by 10. The light-emitting device according to any one of items 1 to 9, comprising: 12. A full spectrum white light emitting device, comprising: A photoluminescent device that produces light with a peak emission wavelength in the range of 490 nm to 680 nm. A sense material; To generate broadband blue excitation light with a dominant wavelength in the range of 420 nm to 480 nm and an operable broadband blue solid-state excitation source; Broadband blue excitation light with at least two different wavelengths in the range of 420nm to 480nm A light emitting device comprising: 13. The broadband blue solid-state excitation source is at least 30 nm, 30 nm to 50 nm, 35 nm F selected from the group consisting of 40 nm to 50 nm, 40 nm to 50 nm, and 45 nm to 50 nm Item 13. The light-emitting device according to item 12, which produces broadband blue excitation light having a WHM. 14. A broadband blue solid-state excitation source, a first light source for generating blue light having a first dominant wavelength in the range of 420 nm to 480 nm; 1 LED and Generates blue emission of a different wavelength with a second dominant wavelength in the range of 420nm to 480nm and a second LED for illuminating the light. 15. The first dominant wavelength is within the range of 420 nm to 450 nm, and the second dominant wavelength is within the range of 450 15. The light-emitting device according to any one of items 12 to 14, wherein the optical wavelength of the light-emitting device is in the range of 480 nm to 480 nm. 16. A third dominant wavelength in the range of 420 nm to 480 nm, different from the first and second dominant wavelengths. Any of items 12 to 15, further comprising a third LED for generating blue light having a long wavelength. The light-emitting device according to any one of the preceding claims. 17. The first LED has a dominant wavelength of about 441 nm and the second LED has a dominant wavelength of about 451 nm. 17. The light emitting device according to claim 16, wherein the first LED has a dominant wavelength of about 468 nm, and the second LED has a dominant wavelength of about 468 nm. Optical devices. It produces white light with a CRI R1 to CRI R15 of 18.90 or higher. 18. The light-emitting device according to any one of items 12 to 17. It produces white light with a CRI R1 to CRI R15 of 19.95 or higher. 19. The light-emitting device according to any one of items 12 to 18. Item 18, characterized in that it produces white light having a CRI Ra of 20.95 or more. 20. A light emitting device according to item 19. Item 12, characterized in that it produces white light having a CRI Ra of 21.80 or more. 21. The light-emitting device according to any one of claims 1 to 20. Item 1, characterized by generating white light having a CRI R12 of 22.90 or more. 22. The light-emitting device according to any one of 2 to 21. 23. The light-emitting device is configured to have an annealing temperature of about 2500K to about 6500K, about 2500K to about 3000K, and white having a color temperature within a range selected from the group consisting of about 4000K to about 6500K. 23. A light emitting device according to any of items 12 to 22, operable to generate light. Produces white light with an IEC TM-30 fidelity index Rf of 24.96 or greater 24. The light-emitting device according to any one of items 12 to 23. 25. A wavelength difference between at least two blue emissions of at least 5 nm, or at least 10 25. The method according to any one of items 12 to 24, wherein the wavelength difference between the blue emissions of at least two of Light emitting device. 26. The broadband blue solid-state excitation source comprises at least two different wavelengths of blue light emitted from the two different wavelengths. Each of the active regions has at least two distinct quantum wells formed therein. 26. The light-emitting device according to any one of items 12 to 25, comprising an LED. 27. Green to yellow photoluminescent materials and red photoluminescent materials are widely used. 27. The light-emitting device according to any one of items 12 to 26, which is located remotely to a band blue solid-state excitation source. Vice. 28. A white light emitting device comprising: A first photodiode that generates light having a peak emission wavelength in the range of 490 nm to 550 nm. A luminescent material and light having a peak emission wavelength in the range of 600 nm to 680 nm. a second photoluminescent material; and Excitation light with a dominant wavelength in the range of 420nm to 480nm and a FWHM of 30nm or more and a broadband solid-state excitation source operable to generate a CRI Ra of 80 or greater. A white light emitting device that produces white light. 29. A white light emitting device comprising: A first photodiode that generates light having a peak emission wavelength in the range of 490 nm to 550 nm. A luminescent material and light having a peak emission wavelength in the range of 600 nm to 680 nm. a second photoluminescent material; and Excitation light with a dominant wavelength in the range of 420nm to 480nm and a FWHM of 25nm or more and a broadband solid-state excitation source operable to generate a CRI Ra of 80 or greater. A white light emitting device that generates white light. 30.Excitation light is 30nm~50nm, 35nm~50nm, 40nm~50nm, and and FWHM within a range selected from the group consisting of 45 nm to 50 nm. 29. The white light emitting device according to claim 29. It produces white light with a CRI R1 to CRI R15 of 31.90 or higher. 31. The white light-emitting device according to any one of items 28 to 30. Item 31, characterized in that it generates white light having a CRI Ra of 32.95 or more. 2. The white light emitting device according to claim 1 . It produces white light with a CRI R1 to CRI R15 of 33.95 or higher. 31. The white light-emitting device according to any one of items 28 to 30. Item 2, characterized by generating white light having a CRI R12 of 34.90 or more. 34. The white light emitting device according to any one of 8 to 33. 35. About 2500K to about 6500K, about 2500K to about 3000K, and about 4000K to produce white light having a color temperature within a range selected from the group consisting of about 6500K 35. The white light-emitting device according to any one of items 28 to 34, IEC TM-30 Fidelity Index R of 36.96 or higher f to generate white light having 36. The white light-emitting device according to any one of items 28 to 35. 37. Any of items 28 to 36, wherein the excitation light includes blue emission of at least two different wavelengths. 2. The white light emitting device according to claim 1 . 38. A solid-state excitation source is Operated to generate blue light having a first dominant wavelength within the range of 420 nm to 480 nm. a first LED that can be activated; To generate a different blue emission having a second dominant wavelength within the range of 420 nm to 480 nm. A white light emitting device according to any one of items 28 to 37, comprising a second LED operable as follows: Vice. 39. A third dominant wavelength in the range of 420 nm to 480 nm, different from the first and second dominant wavelengths. Item 39. The light-emitting device according to item 38, further comprising a third LED for generating blue light having a long wavelength. Vice. 40. The first LED has a dominant wavelength of about 441 nm and the second LED has a dominant wavelength of about 451 nm. Item 39. The light emitting device according to item 39, wherein the first LED has a dominant wavelength of about 468 nm, and the third LED has a dominant wavelength of about 468 nm. Optical devices. 41. The blue solid-state excitation source comprises at least one blue emitting diode having at least two different wavelengths. and an LED having an active region with at least two different quantum wells each of which is formed by 37. The white light-emitting device according to any one of items 27 to 36, comprising:

Claims

1. 1. A full spectrum white light emitting device, comprising: A first photodiode that produces light having a peak emission wavelength in the range of 490 nm to 550 nm. A luminescent material and a device for producing light having a peak emission wavelength in the range of 600 nm to 680 nm. a second photoluminescent material comprising Excitation light having a dominant wavelength in the range of 420 nm to 480 nm and a FWHM of 30 nm or more and a broadband solid-state excitation source operable to generate a full spectrum white light emitting device. Chair.

2. The excitation light is 30 nm to 50 nm, 35 nm to 50 nm, 40 nm to 50 nm, and 2. The optical fiber according to claim 1, having a FWHM within a range selected from the group consisting of 45 nm to 50 nm. A full spectrum white light emitting device.

3. Characterized by producing white light with a CRI R1 to CRI R15 of 90 or higher 2. The full spectrum white light emitting device of claim 1 .

4. 4. The lamp of claim 3, which produces white light having a CRI Ra of 95 or greater. of full spectrum white light emitting device.

5. Characterized by producing white light with a CRI R1 to CRI R15 of 95 or higher 2. The full spectrum white light emitting device of claim 1 .

6. 2. The lamp according to claim 1, which produces white light having a CRI R12 of 90 or more. A full spectrum white light emitting device.

7. The light emitting device emits white light having a color temperature in the range of about 2500 K to about 6500 K.

13. The full spectrum white light emitting device of claim 1 operable to generate

8. IEC TM-30 Fidelity Index R of 96 or higher ｆ The present invention is characterized in that it generates white light having 2. The full spectrum white light emitting device of claim 1 .

9. 2. The fluorescent material according to claim 1, wherein the excitation light comprises blue emissions of at least two different wavelengths. Spectral white light emitting device.

10. The solid-state excitation source comprises: Operated to generate blue light having a first dominant wavelength in the range of 420 nm to 480 nm. a first LED capable of being operated; To generate a different blue emission having a second dominant wavelength in the range of 420 nm to 480 nm. and a second LED operable as follows: Chair.

11. the blue solid-state excitation source emits blue light of at least two different wavelengths, an active region having at least two distinct quantum wells, each of which produces one 10. The light emitting device of claim 9 comprising an LED.

12. 1. A full spectrum white light emitting device, comprising: A photoluminescent device that produces light having a peak emission wavelength in the range of 490 nm to 680 nm. A sense material; To generate broadband blue excitation light having a dominant wavelength in the range of 420 nm to 480 nm. and an operable broadband blue solid-state excitation source; The broadband blue excitation light has at least two different wavelengths in the range of 420 nm to 480 nm. A light emitting device, comprising:

13. The broadband blue solid-state excitation source has a wavelength of at least 30 nm, 30 nm to 50 nm, 35 nm to FW selected from the group consisting of 50 nm, 40 nm to 50 nm, and 45 nm to 50 nm The light emitting device of claim 12 , which produces broadband blue excitation light having HM.

14. The broadband blue solid-state excitation source comprises: a first light source for generating blue light having a first dominant wavelength in the range of 420 nm to 480 nm; 1 LED, Producing a different wavelength of blue light having a second dominant wavelength in the range of 420 nm to 480 nm. and a second LED for providing a first illumination source to the light emitting device of claim 12 .

15. The first dominant wavelength is in the range of 420 nm to 450 nm, and the second dominant wavelength is The light emitting device of claim 14, wherein the wavelength is in the range of 450 nm to 480 nm.

16. a third dominant wavelength in the range of 420 nm to 480 nm that is different from the first and second dominant wavelengths; 15. The light emitting device of claim 14, further comprising a third LED for producing blue light having Vice.

17. The first LED has a dominant wavelength of about 441 nm and the second LED has a dominant wavelength of about 451 nm.

17. The method of claim 16, wherein the third LED has a dominant wavelength of about 468 nm. Light-emitting device.

18. Characterized by producing white light with a CRI R1 to CRI R15 of 90 or higher 13. The light emitting device of claim 12.

19. Characterized by producing white light with a CRI R1 to CRI R15 of 95 or higher 13. The light emitting device of claim 12.

20. 18. A light source according to claim 17, characterized in that it produces white light having a CRI Ra of 95 or more.

20. The light emitting device of claim 19.

21. 13. The lamp according to claim 12, which produces white light having a CRI Ra of 80 or more. A light-emitting device mounted on a

22. 13. The lamp of claim 12, which produces white light having a CRI R12 of 90 or more. The light emitting device described herein.

23. The light emitting device is configured to have a temperature of from about 2500K to about 6500K, from about 2500K to about 3000K, and and a white light having a color temperature within a range selected from the group consisting of about 4000K to about 6500K.

13. The light emitting device of claim 12 operable to generate:

24. It is characterized by producing white light having an IEC TM-30 fidelity index Rf of 96 or more. The light emitting device of claim 12 .

25. A wavelength difference between the at least two blue emissions of at least 5 nm, or at least 10 nm.

13. The light emitting device of claim 12, wherein there is a wavelength difference between the at least two blue emissions of m. 。

26. The broadband blue solid-state excitation source emits blue light at at least two different wavelengths. The active region has at least two different quantum wells, each of which produces one of the quantum wells.

13. The light emitting device of claim 12 comprising an LED.

27. A green-yellow photoluminescent material and a red photoluminescent material are 13. The light emitting device of claim 12, wherein the light emitting device is located remotely relative to a broadband blue solid-state excitation source.

28. 1. A white light emitting device, comprising: A first photodiode that produces light having a peak emission wavelength in the range of 490 nm to 550 nm. a luminescent material and light having a peak emission wavelength in the range of 600 nm to 680 nm; a second photoluminescent material is produced; and Excitation light having a dominant wavelength in the range of 420 nm to 480 nm and a FWHM of 30 nm or more and a broadband solid-state excitation source operable to generate a CRI Ra of 80 or greater. A white light emitting device that produces white light.

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