CN210073838U - LED device and corresponding lamp - Google Patents

Abstract

Embodiments of the present disclosure relate to an LED device and a corresponding lamp. The LED device comprises a first LED light source configured to emit cyan light of a first wavelength range; and a combination of a second LED light source and a phosphor configured to emit white light, wherein the second LED light source is configured to emit blue light of a second wavelength range, the phosphor configured to at least partially convert the blue light of the second wavelength range incident thereon to light of a third wavelength range so as to combine with unconverted blue light to form the white light; wherein the second LED light source is adapted to be powered separately or simultaneously with the first LED light source to enable the LED device to switch between emission of at least two of the following a) and b): a) the white light, and b) a combined light of both the white light and the cyan light. By switching the two lights, the LED device can advantageously be adapted to different application scenarios.

Description

LED device and corresponding lamp

Technical Field

Embodiments of the present disclosure relate to the field of lighting, and more particularly, to an LED device and a corresponding lamp.

Background

The research shows that: light has an effect not only on the human vision but also on the biorhythm. Exposure to too much light at night will make people alert and difficult to fall asleep. Further studies have shown that melanotropin in the human eye is sensitive to light in the wavelength range of cyan light from blue to green (i.e., from 480nm to 490nm), and thus may affect melatonin secretion in the human body to some extent. For example, during the day, active melanopsin can inhibit melatonin secretion, helping people stay awake; at night, the low-activity melanotropin can allow melatonin to be secreted, and helps people to quickly sleep. Thus, light has a profound effect on the biorhythm of humans.

Meanwhile, different white lights have different color rendering indexes and spectral distributions. In order to more realistically reproduce the color of an illuminated object, it is often desirable to provide white light with a higher color rendering index and a broader spectral distribution. Various artificial lights have been proposed for use in various application scenarios. However, these artificial lights are not satisfactory in regulating the biorhythm of the human body, providing a high color rendering index and/or a broad spectral distribution.

SUMMERY OF THE UTILITY MODEL

It is an object of the present disclosure to provide an LED device that can be improved at least in terms of regulating the biorhythm of the human body, providing a high color rendering index and/or a broad spectral distribution.

According to a first aspect of the present disclosure, there is provided an LED device. The LED device comprises a first LED light source configured to emit cyan light of a first wavelength range; and a combination of a second LED light source and a phosphor configured to emit white light, wherein the second LED light source is configured to emit blue light of a second wavelength range, the phosphor configured to at least partially convert the blue light of the second wavelength range incident thereon to light of a third wavelength range so as to combine with unconverted blue light to form the white light; wherein the second LED light source is adapted to be powered separately or simultaneously with the first LED light source to enable the LED device to switch between emission of at least two of the following a) and b): a) the white light, and b) a combined light of both the white light and the cyan light.

With the LED device of the present disclosure, it is thus possible to provide at least two lights, namely a) white light generated by conventional blue-based excitation phosphors; and b) a combination of white light and cyan light. By switching between these two lights, the LED device can advantageously be adapted to different application scenarios. Particularly, due to the existence of the cyan light in the combined light, the biological rhythm of a human body can be effectively adjusted, the spectrum of the white light output by the lamp can be expanded, and the color rendering index of the output white light is improved.

In some embodiments, the cyan light of the first wavelength range has a peak wavelength of 485nm and the blue light of the second wavelength range has a peak wavelength of 450 nm. In these embodiments, cyan light having the peak wavelength of 485nm and blue light having the peak wavelength of 450nm may be implemented by a cyan light chip and a blue light chip. Particularly, the blue light chip is a mainstream light emitting chip in the market, and the cost of the white light lamp can be effectively reduced by generating white light based on the blue light chip.

In some embodiments, the LED lamp further comprises a first electric connecting terminal and a second electric connecting terminal, and a third electric connecting terminal and a fourth electric connecting terminal, wherein the first electric connecting terminal and the second electric connecting terminal are respectively electrically connected to the positive pole and the negative pole of the first LED light source for controlling the cyan light emitted by the first LED light source; the third electric connection terminal and the fourth electric connection terminal are respectively and electrically connected to the anode and the cathode of the second LED light source so as to control the white light emitted by the combination. In the embodiments, the first LED light source and the second LED light source can be independently controlled through the electrical terminals, so that the switching between the two different lights is realized.

In some embodiments, the LED device is an LED package comprising a first resin encapsulating both the first LED light source and the combination of the second LED light source and the phosphor. In such embodiments, the LED device may be in the form of a package, thereby facilitating subsequent use as a light source in a luminaire

In some embodiments, the LED package further comprises a second resin encapsulating only the combination of the second LED light source and the phosphor, wherein the first LED light source is located outside the second resin, the first resin encapsulating the second resin and the first LED light source. In these embodiments, the phosphor is used only in combination with the second LED light source, thereby enabling conversion of only light emitted by the second LED light source.

In some embodiments, the phosphor includes at least a red phosphor dispersed in the second resin. In the embodiments, the red phosphor can effectively expand the red light component in the white light, so that a wider spectrum of illuminating white light can be realized.

In some embodiments, the red phosphor is potassium manganese fluorosilicate. The phosphor may be, for example, a red phosphor (S90 phosphor) of type NR6931-04C from Intel corporation. The S90 fluorescent powder can effectively improve the light extraction efficiency of the second LED light source and realize the effective balance of the red light spectrum component and other spectrum components.

In some embodiments, the LED device is configured such that when emitting the combined light of both the white light and the cyan light, a ratio of a first spectral power of the white light and a second spectral power of the cyan light is 13:1 to 26: 1. In these embodiments, the color rendering index may be adjusted by adjusting a ratio of the first spectral power of the white light and the second spectral power of the cyan light.

In some embodiments, the LED device is configured such that when emitting the combined light of both the white light and the cyan light, a ratio of a first spectral power of the white light and a second spectral power of the cyan light is 20: 1. At this ratio, the color rendering index Ra of the present disclosure may be as high as 96.

According to another aspect of the present disclosure, an LED lamp is provided. The lamp comprises an LED device according to any of the previous embodiments.

It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the embodiments of the present disclosure will become readily apparent from the following description.

Drawings

The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:

FIG. 1 shows a schematic of the spectral distribution of white light, independently generated cyan light, and a combination of the two based on blue wavelengths and phosphor production according to one embodiment of the present disclosure;

FIG. 2 shows a schematic circuit diagram of an LED device for producing the white and/or cyan light of FIG. 1;

FIG. 3 illustrates an example arrangement of first and second LED light sources interspersed and evenly distributed within a lamp;

fig. 4 shows a schematic view of a package structure of an LED device according to an embodiment of the present disclosure;

FIG. 5 shows a spectral distribution diagram of an S90 phosphor adapted for excitation via 450nm blue light;

FIG. 6 shows a spectral distribution of white light generated based on 450nm blue light and S90 phosphor;

FIGS. 7, 8 and 9 show diagrams of the spectral distribution emitted by the LED device of FIG. 1 for different spectral powers of the test cyan light, respectively;

FIG. 10 shows the color rendering index of b) light generated in the case of using S90 phosphor according to the LED device shown in FIG. 1; and

fig. 11 shows a schematic distribution diagram of hue angles measured according to b) light generated in the case of using S90 phosphor in the LED device shown in fig. 1.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

At present, there are three methods for generating white light or white-like light in the LED market: 1) r, G, B the light emitted by the LED light sources of three primary colors is mixed to generate white light; 2) exciting the fluorescent powder by using ultraviolet light to generate white light; and 3) exciting the yellow phosphor (and possibly other red phosphors) with a blue wavelength to produce white light.

In the first scheme, since the spectral width of light emitted by the R, G, B tricolor monochromatic LED is narrow, the continuity of the combined spectrum is poor in the range of 380-780nm in the visible light spectrum, and the color rendering index Ra is usually low and difficult to adopt. In the second scheme, because the light efficiency of the ultraviolet LED chip is low at present, and the problems that the packaging material is easy to age, ultraviolet light is prevented from leaking out to hurt human bodies and the like are not solved, the ultraviolet LED chip is still not used in large quantity although the Ra of the ultraviolet LED chip is higher. The only third approach to phosphor excitation with blue LED chips is rapid and widespread.

For the third white light scheme described above, in which a blue LED chip is used to excite a phosphor, fig. 1 shows a curve 23 of the spectral power distribution of white light corresponding to this white light scheme. As can be seen from this curve 23, the white light spectrum does not have a full spectrum distribution like natural light (e.g., sunlight), which, although having peak wavelengths in the vicinity of 450nm and 630nm, does not have a cyan wavelength range from 480nm to 490 nm. As discussed in the background section above, where melanopsin in the human eye is more sensitive to light in the blue to green wavelength range of cyan light (e.g., 480nm to 490nm), the activation or lack thereof can affect melatonin secretion and thus, the biorhythm of a person.

Although manufacturers of lamps on the market have provided light sources or luminaires that can implement white light of various types of spectra for various considerations (e.g., merely for simulating the full spectrum of natural light), the inventors have studied and found that the white light spectrum of these light sources or luminaires on the market is generally applied unchanged to various living or working scenes, and cannot implement adjustment of the white light spectrum in different application scenes. For example, the light sources or lamps on the market provide a white light source with a full spectrum, which provides illumination with a constant white light spectrum, whether during daytime operation or during illumination before night rest, wherein the full spectrum illumination light will always suppress melatonin secretion, and the user cannot select other types of white light spectrum, thereby being unfavorable for night rest or sleep of the user.

To this end, one idea of the present disclosure is to provide white light illumination with a switchable white light spectrum, wherein the white light illumination can be switched between at least the following two white light spectra:

i) exciting a white light spectrum generated by the fluorescent powder by using blue light; and

ii) a combined spectrum of white light spectrum + cyan light spectrum generated by exciting the phosphor with blue light.

It will be appreciated that the above-mentioned white light spectrum of i) does not have a cyan wavelength range from 480nm to 490nm, and therefore it may allow the secretion of melatonin, thereby contributing to the rest or sleep of the user, while the combined spectrum of ii) is also substantially a white light or white light-like spectrum, and may contain a cyan wavelength range from 480nm to 490nm, and therefore it may effectively suppress the secretion of melatonin, thereby contributing to the user keeping awake, and being efficiently put into working and learning. Switching the two spectra i) and ii) above advantageously helps the user to adapt to different work or life scenarios more quickly.

Fig. 2 shows a schematic circuit diagram of an LED device for producing the white and/or cyan light of fig. 1.

As shown in fig. 2, the LED device 1 may comprise a combination 8 of a first LED light source 2 and a second LED light source 3 and a phosphor 4, wherein the first LED light source 2 may be configured to emit cyan light of a first wavelength range; the second LED light source 3 may be configured to emit blue light of a second wavelength range and the phosphor 4 may be configured to at least partially convert blue light of said second wavelength range incident thereon into light of a third wavelength range so as to form said white light in combination with unconverted blue light.

In some embodiments, the first LED light source 2 may be, for example, a cyan light chip, and the cyan light of the first wavelength range may have a peak wavelength of 485 nm; the second LED light source 3 may for example be a blue chip, and the blue light of the above-mentioned second wavelength range may have a peak wavelength of 450 nm. It will be appreciated that providing the first LED light source 2 and the second LED light source 3 in the form of chips may simplify the arrangement of the LED devices. In addition, the blue chip with the peak wavelength of 450nm is a blue chip commonly used in the field, and the cost is relatively low, so that the blue chip is used for exciting the fluorescent powder to generate white light, and the cost for generating the white light can be effectively reduced.

Although only one first LED light source 2 and one second LED light source 3 are depicted in fig. 2, it will be understood that the number of first LED light sources 2 and second LED light sources 3 may vary, in other embodiments there may be a greater number of first LED light sources 2 and second LED light sources 3, and the ratio of the number of first LED light sources 2 and second LED light sources 3 may also vary. Further, while in the above embodiments cyan light having a peak wavelength of 485nm and blue light having a peak wavelength of 450nm are also defined, it will be appreciated that this is not limiting and that in other embodiments other peak wavelengths of cyan and blue light may be employed.

In order to achieve the above-mentioned switching of both i) and ii) white light spectra, the above-mentioned second LED light source 3 is arranged to be adapted to be powered separately or simultaneously with said first LED light source 2, so that the LED device 1 is capable of switching between at least the following two light emissions a) and b):

a) white light having the above i) white light spectrum; and

b) a combined light having the combined spectrum of ii) above.

In order to control the light emission of the first LED light source 2 and the second LED light source 3, as shown in fig. 2, the LED device 1 further comprises a first electrical terminal 11 and a second electrical terminal 12, and a third electrical terminal 13 and a fourth electrical terminal 14, wherein the first electrical terminal 11 and the second electrical terminal 12 are electrically connected to the positive electrode and the negative electrode of the first LED light source 2, respectively, for controlling the cyan light emitted by the first LED light source; the third electrical terminal 13 and the fourth electrical terminal 14 are electrically connected to the positive electrode and the negative electrode of the second LED light source 3, respectively, for controlling the white light emitted by the combination 8.

It will be appreciated that with the circuit arrangement depicted in fig. 2 above, a user can easily control both the first LED light source 2 and the second LED light source 3 independently via an external driving circuit (and control circuit), thereby achieving free switching of the two lights a) and b) above.

In order to ensure that the light emitting form of the lamp does not change significantly when the lamp performs free switching of the two lights a) and b), in some embodiments, the first LED light source 2 and the second LED light source 3 may be interspersed and uniformly distributed on the light emitting surface in the lamp.

By way of example only, fig. 3 illustrates an example of an arrangement in which the first LED light sources 2 and the second LED light sources 3 are interpenetrating and uniformly distributed within the lamp 30, wherein the lamp 30 may comprise, for example, four LED devices 1, each LED device 1 may comprise 1 first LED light source 2 and 3 second LED light sources 3, and the respective phosphors 4 may be arranged (e.g., coated) downstream of the corresponding second LED light sources 3.

When only the light illumination using a) above is used, then only the second LED light source 3 is illuminated in fig. 3, thereby producing a first white light output distribution of the lamp 30; and when only the light illumination using b) above is used, the first LED light source 2 and the second LED light source 3 in fig. 3 are simultaneously illuminated at this time, thereby producing a second white light output distribution of the lamp 30. Since the plurality of first LED light sources 2 are arranged alternately between the plurality of second LED light sources 3, the first white light output distribution and the second white light output distribution of the above-described lamp 30 do not differ significantly, which makes the white light illumination switching less noticeable to a user.

It will be understood that the above-described structure and arrangement of fig. 3 is merely an example, which does not constitute any limitation to the structure of the lamp 30 of the present disclosure, and in other embodiments, the number and arrangement of the first and second LED light sources 2, 3 within the lamp 30 may vary, and/or the number and arrangement of the LED devices 1 including both the above-described first and second LED light sources 2, 3 may vary.

In the above-described embodiments, the predetermined number and/or ratio of the first LED light source 2 and the second LED light source 3 included in the LED device 1 may be present in the LED device 1 in the form of unpackaged bare chips or form the LED device, but this is not a limitation, and in other embodiments, the LED device 1 may also be formed as a structure of the LED package 10. Fig. 4 shows a schematic view of a package structure of the LED device.

As shown in fig. 4, the LED package 10 may include a first resin 6, and the first resin 6 may encapsulate the combination 8 of the second LED light source 3 and the phosphor 4 and the first LED light source 2, with the phosphor 4 located downstream of the second LED light source 3. In further embodiments, the phosphor 4 may be distributed in a second resin 5, wherein the second resin 5 encapsulates the second LED light source 3, while the first LED light source 2 may be located outside the second resin 5, and the first resin 6 encapsulates the second resin 5 as well as the first LED light source 2. In these embodiments, blue light of the second wavelength range emitted from the second LED light source 3 will be at least partially converted by the phosphor 4, while cyan light of the first wavelength range emitted from the first LED light source 2 may be transmitted directly through the first resin 6 without any conversion by the phosphor 4.

Although a second resin 5 is described above, it will be appreciated that in some embodiments, a second resin 5 may not be necessary, in which case the phosphor 4 may be coated directly over the second LED light source 3 to form the combination 8 of the phosphor 4 and the second LED light source 3.

As will be appreciated from the above description with reference to fig. 2 to 4, it will be appreciated that the above can be achieved by independent and/or combined power control of the first LED light source 2 and the second LED light source 3, with or without encapsulation: a) white light having the i) white spectrum described above, and b) combined light having the ii) combined spectrum described above.

In order to clearly show the difference between the spectra of the light a) and the light b), referring back to fig. 1, the curve 23 in fig. 1 shows the white light spectral distribution corresponding to a); the curve 21 shows the combined spectral distribution for the light of b) above. Note that: wherein b) the spectral distribution of the light corresponds to the superposition of the spectral distribution of the white light corresponding to the light of a) and the spectral distribution of the cyan light marked by curve 22.

Since the different lights of a) and b) can be freely switched to be generated, the different lights of a) and b) can be used in different application scenes to realize the regulation of the biological rhythm of the human body. For example, in an operation scene, the LED device may be controlled to provide only the b) lights to suppress the secretion of melatonin of the user, so as to keep the user awake and improve the operation efficiency; in the scene of preparing rest, the LED device may be controlled such that it provides only the light of the a) kind, while allowing the secretion of melatonin, thereby allowing the user to rest better.

The application of the LED device of the present disclosure in the regulation of biological rhythms has been described above in detail. However, in addition to applications in modulating biorhythms, the LED devices of the present disclosure may also be used to produce illuminated white light with a high color rendering index and a full spectrum.

The application of the above-described LED device in generating white light with high color rendering index and full spectrum illumination will be described below with reference to fig. 1, 5 to 11.

As is well known, in the conventional scheme of exciting the phosphor based on the blue LED chip to generate white light, the phosphor may be yellow YAG phosphor, so that the blue and yellow complementary colors can form white light. However, the inventors noted that: due to the lack of red spectrum in the white light spectrum generated by the conventional scheme, it is difficult to make white light LED with low color temperature (for example, correlated color temperature is less than 4000K), and the color rendering index Ra is also low-mostly above 5500K, the color rendering index Ra can be more than 80, and only 85 or more at most-can not achieve the target of Ra more than 90.

Thus, in some embodiments, the phosphor 4 of the present disclosure may include a red phosphor in addition to the YAG phosphor described above. Due to the presence of the red phosphor, the white light of a) above will contain sufficient red spectral components to achieve an increase in the color rendering index Ra.

In some embodiments, the red phosphor may be, for example, potassium manganese fluorosilicate (K) phosphor₂SiF₆Mn). By way of example only, the potassium manganese fluorosilicate phosphor may be, for example, a red phosphor manufactured by Intel corporation under model No. NR6931-04C (hereinafter referred to as S90 phosphor). The inventor notices that: the use of potassium manganese fluorosilicate phosphors such as S90 can effectively increase the light extraction efficiency of the LED devices of the present disclosure and achieve an effective balance of the red spectral components and other spectral components.

FIG. 5 shows a spectral distribution diagram of an S90 phosphor adapted for excitation via a blue wavelength such as 450 nm; and FIG. 6 shows a spectral distribution diagram of white light generated based on 450nm blue light and S90 phosphor.

In contrast, the white light spectral distribution using the S90 phosphor (i.e., curve 25) shown in fig. 5 is better in the spectral distribution balance of visible light than the white light spectral distribution (i.e., curve 23) produced using the conventional yellow YAG phosphor + red phosphor shown in fig. 1. It will be appreciated that this is advantageous for improving the color rendering index Ra of the white light generated by the overall LED device.

To achieve a higher color rendering index, it is crucial to supplement the cyan light spectrum around the wavelength 480 shown in fig. 5, and as described above, the structure of the LED device of fig. 1 of the present disclosure may effectively provide the cyan light wavelength range including the peak wavelength of 485nm, and thus may effectively provide white light having a full spectrum and a high color rendering index.

Fig. 7 to 9 show schematic diagrams of the spectral distribution emitted by the LED device shown in fig. 1 for different test cyan light spectral powers, wherein the dashed line 20 shows a schematic spectral power distribution of natural light as a reference; solid line 26 shows a schematic white light spectral distribution emitted by the LED device with a first cyan spectral power; solid line 27 shows a schematic white light spectral distribution emitted by the LED device with a second cyan optical spectral power; the solid line 28 shows the schematic white light spectral distribution emitted by the LED device at the third cyan spectral power.

As can be seen from comparison with fig. 7 to 9, the spectral distribution of white light having the third cyan light spectral power shown by the solid line 28 of fig. 9 is closer to the spectral power distribution of natural light as a reference, and thus a higher color rendering index Ra can be achieved.

Experiments prove that when the ratio of the first spectral power distribution of white light generated by the fluorescent powder excited by blue light in b) light emitted by the LED device shown in FIG. 1 to the second spectral power of cyan light is within the range of 13: 1-26: 1, the color rendering index Ra of the provided white light can exceed 90. In particular, when the ratio is 20:1, the color rendering index Ra of the white light provided may even be as high as 96. In some embodiments, the ratio control of the first spectral power distribution of the white light and the second spectral power distribution of the cyan light may be achieved by adjusting the current through the first LED light source 2 and the second LED light source 3 by an external control circuit (not shown).

FIG. 10 shows the color rendering index of b) light generated in the case of using S90 phosphor according to the LED device shown in FIG. 1; and FIG. 11 shows a schematic distribution diagram of hue angles measured according to b) light generated in the case of using the S90 phosphor in the LED device shown in FIG. 1.

As can be seen from fig. 10, the color rendering index Ra of the obtained white light can be as high as 96, and the lowest R9 can be 82, and R12 can be 83. Therefore, the white light generated by the LED device shown in fig. 1 of the present disclosure can obtain an extremely high color rendering index; while white light in the full spectrum range can be realized as can be seen from the distribution of hue angles in fig. 11.

The application of the LED device of the present disclosure as a light source of white light in regulating biorhythms, providing white light of high color rendering index and wider spectrum (e.g., "full spectrum") has been described above in detail. It will be appreciated that the above-described LED device may be implemented in a lighting fixture such as an LED lamp, and thus the lighting fixture may also fulfill the purpose of the LED device described above in regulating biorhythms, providing a high color rendering index and a wider spectrum. In some embodiments, the LED lamp may include, for example, one or more of the LED devices described above.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the present invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.

In the claims, the word "comprising" does not exclude other elements, and the indefinite article "a" or "an" does not exclude a plurality. A single element or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain features are recited in mutually different embodiments or in dependent claims does not indicate that a combination of these features cannot be used to advantage. The scope of protection of the present application covers any possible combination of features recited in the various embodiments or in the dependent claims, without departing from the spirit and scope of the application.

Any reference signs in the claims shall not be construed as limiting the scope of the invention.

Claims (10)

1. An LED device (1), characterized in that it comprises:

a first LED light source (2) configured for emitting cyan light of a first wavelength range; and

a combination (8) of a second LED light source (3) and a phosphor (4) configured to emit white light, wherein the second LED light source (3) is configured to emit blue light of a second wavelength range, the phosphor (4) being configured to at least partially convert the blue light of the second wavelength range incident thereon into light of a third wavelength range so as to form the white light in combination with unconverted blue light;

wherein the second LED light source (3) is adapted to be powered separately or simultaneously with the first LED light source (2) to enable the LED device (1) to switch between the emission of at least two of the following a) and b):

a) the white light, and

b) a combined light of both the white light and the cyan light.

2. The LED device of claim 1, wherein the cyan light in the first wavelength range has a peak wavelength of 485nm and the blue light in the second wavelength range has a peak wavelength of 450 nm.

3. LED device according to claim 1, characterized in that it further comprises a first electrical terminal (11) and a second electrical terminal (12), and a third electrical terminal (13) and a fourth electrical terminal (14),

the first electric connection terminal (11) and the second electric connection terminal (12) are respectively electrically connected to the anode and the cathode of the first LED light source (2) for controlling the cyan light emitted by the first LED light source; the third electrical connection terminal (13) and the fourth electrical connection terminal (14) are electrically connected to the positive electrode and the negative electrode of the second LED light source (3) respectively for controlling the white light emitted by the combination (8).

4. The LED device (1) according to claim 1, characterized in that the LED device (1) is an LED package (10) comprising a first resin (6), the first resin (6) encapsulating both the combination (8) of the second LED light source (3) and the phosphor (4) and the first LED light source (2).

5. LED device according to claim 4, characterized in that the LED package (10) further comprises a second resin (5), the second resin (5) encapsulating only the combination (8) of the second LED light source (3) and the phosphor (4),

wherein the first LED light source (2) is located outside the second resin (5), the first resin (6) encapsulating the second resin (5) and the first LED light source (2).

6. LED device according to claim 5, characterized in that said phosphor (4) comprises at least a red phosphor, which is dispersed in said second resin (5).

7. The LED device according to claim 6, wherein the red phosphor (4) is potassium manganese fluorosilicate.

8. The LED device according to any of the claims 1-7, characterized in that the LED device (1) is configured such that when emitting the combined light of both the white light and the cyan light, the ratio of the first spectral power of the white light and the second spectral power of the cyan light is 13: 1-26: 1.

9. The LED device according to claim 8, characterized in that the LED device (1) is configured such that when emitting a combined light of both the white light and the cyan light, the ratio of the first spectral power of the white light and the second spectral power of the cyan light is 20: 1.

10. LED lamp, characterized in that it comprises a LED device (1) according to any one of claims 1-9.

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