Lighting device

Abstract

A lighting device (100) providing device light includes an elongated carrier (110), a plurality of LEDs (130) arranged on the elongated carrier, where the plurality of LEDs includes a first set (200) of n blue LEDs, a second set (210) of n green LEDs, a third set (220) of n red LEDs, where the plurality of LEDs includes n groups (400) of blue, green, and red LEDs in a clustered (410) or pitch (420) configuration. The lighting device also includes a controller (300) coupled to the plurality of LED groups, wherein the controller is configured to individually control operation of each LED in the plurality of LED groups in the clustered and pitch configuration, respectively.

Description

Technical Field

[0001] This disclosure relates to lighting devices, and in particular to LED light strips. Background Technology

[0002] Recently, LED (light-emitting diode) light strip arrangements have become popular due to their versatility and reasonable cost. LED light strips can be easily installed, offer many variations in length, color, and brightness options, and are cost-effective. LED light strip arrangements are typically designed with LEDs arranged on a slender carrier. Existing LED light strip arrangements may have the disadvantage of speckle, and in other cases, may not produce white light in the near field.

[0003] The purpose of this invention is to overcome the aforementioned deficiencies and improve the overall performance, functionality, and / or appearance of LED light strip arrangements. One way to improve LED light strips is by fine-tuning the LED illumination to produce better light. Tuning the spectrum will produce differences; however, the optimal spectrum depends on the application, daytime (circadian rhythm), user preferences, etc. Summary of the Invention

[0004] It is of interest to overcome at least some of the architectural shortcomings of this technology and to provide LED strip arrangements for fine-tuning LED lighting.

[0005] This and other objectives are achieved by providing a lighting device having the features described in the independent claim. Preferred embodiments are defined in the dependent claims.

[0006] According to the present invention, an illumination device for providing light to a device is provided. The illumination device includes an elongated carrier and a plurality of light-emitting diodes (LEDs) arranged on the elongated carrier.

[0007] The multiple LEDs include a first set of n blue LEDs, a second set of n green LEDs, and a third set of n red LEDs.

[0008] have n A first set of blue LEDs is configured to emit first light within a first wavelength range λ1 of 430-490 nm, wherein, for any blue LED i , i=1 ,…, n ,in n ≥3, blue LED i Emission peak wavelength λB within the first wavelength range λ1 i ,for j = 1 ,…, n and i≠j Peak wavelength λB i ≠λB j .

[0009] have n A second set of green LEDs is configured to emit second light within a second wavelength range λ2 of 500-590 nm, wherein, for any green LED i , i=1 ,…, n ,in n ≥3, green LED i Emission peak wavelength λG within the second wavelength range λ2 i ,for j = 1 ,…, n and i≠j Peak wavelength λG i ≠λG j .

[0010] have n The third set of red LEDs is configured to emit third light within a third wavelength range λ3 of 600-690 nm, wherein, for any red LED i , i=1 ,…, n ,in n ≥3, red LED i The peak emission wavelength λR is within the third wavelength range λ3. i ,for j = 1 ,…, n and i≠j Peak wavelength λR i ≠λR j .

[0011] Multiple LEDs including n 400 LED groups, each group k=1 ,…, n ,in n ≥3, including: at least one blue LED k At least one green LED k and at least one red LED kThe plurality of LED groups further includes one of the following: a first configuration in which each LED group is confined within a region A having a radius r, and wherein the plurality of LED groups are distributed on an elongated carrier such that any two consecutive LED groups are separated by at least a first distance D1, wherein D1 > 3·r; and a second configuration in which the LED groups are arranged in at least one separately arranged LED array, wherein any two consecutive LEDs have different colors and are separated by at least a second distance D2, preferably D2 > 1 mm; and a controller coupled to the plurality of LED groups. The controller is configured to individually control the operation of each LED in the plurality of LED groups. The controller is also configured to control the first configuration in a first operating mode and the second configuration in a second operating mode. In the first operating mode OM1, the device light has a first correlated color temperature CCT1 and a first spectral distribution SD1. In the second operating mode OM2, the device light has a second correlated color temperature CCT2 and a second spectral distribution SD2, wherein... And SD1 ≠ SD2.

[0012] According to a second aspect of the present invention, an LED lighting device is provided. The LED lighting device includes a lighting apparatus according to a first embodiment and any preferred embodiment of the present invention. The LED lighting device further includes a cover and an electrical connector. The cover comprises a material that is at least partially transparent, and the material at least partially surrounds the lighting apparatus. The electrical connector is connected to the lighting apparatus for supplying power to a plurality of LEDs of the lighting apparatus.

[0013] Therefore, the present invention is based on the idea of ​​providing an illumination device comprising at least three sets of blue, green, and red LEDs, each set of LEDs of the same color emitting corresponding colored light with a different dominant peak wavelength compared to at least two other sets of LEDs of the same color within the wavelength of a specific color. Multiple LEDs can be configured in a first configuration, wherein each LED group is confined within a region A having a radius r, and wherein the multiple LED groups are distributed on an elongated carrier such that any two consecutive LED groups are separated by at least a first distance D1, where D1 > 3·r. Multiple LEDs can also be configured in a second configuration, wherein the LED groups are arranged in at least one separately arranged LED array, and any two consecutive LEDs have different colors and are separated by at least a second distance D2. A controller is coupled to the multiple LED groups and individually controls the operation of each LED in the multiple LED groups. The controller is arranged to adjust two consecutive LED groups to a correlated color temperature (CCT), respectively. The controller controls a first configuration in a first operating mode OM1, wherein the device light has a first correlated color temperature CCT1 and a first spectral distribution SD1. The controller also controls a second configuration in a second operating mode OM2, where OM2 controls the second configuration, and the device light has a second correlated color temperature CCT2 and a second spectral distribution SD2. And SD1 ≠ SD2.

[0014] The advantage of this invention lies in its ability to fine-tune LED lighting to produce improved light.

[0015] According to an embodiment of the present invention, the difference D of the correlated color temperature (CCT) between any two LED groups CCT satisfy .

[0016] According to an embodiment of the present invention, the luminous flux of each group in the first operating mode may differ from that in the second operating mode. According to an embodiment of the present invention, along the axis A of the elongated carrier, the peak wavelengths λBk+1, λGk+1, and λRk+1 of the (k+1)th group are respectively higher than the corresponding peak wavelengths λBk, λGk, and λRk of the preceding adjacent kth group.

[0017] According to an embodiment of the present invention, along the axis A of the elongated carrier (110), the peak wavelengths λBk+1, λGk+1, and λRk+1 of the k+1th group are alternately higher and lower than the corresponding peak wavelengths λBk, λGk, and λRk of the preceding adjacent kth group, respectively.

[0018] According to an embodiment of the invention, the peak wavelengths of two corresponding LEDs from two consecutive groups (400) differ by a phase value Δλ, where Δλ ≥ 20 nm.

[0019] According to an embodiment of the present invention, a plurality of LED groups are distributed on an elongated carrier according to a second configuration, wherein any two consecutive LEDs in any group are separated by a second distance D2, and any two consecutive LEDs from different groups are separated by a third distance D3, wherein D3≥D2.

[0020] According to an embodiment of the invention, the LED group is separated by either a warm white WW LED of 2700-3000K or a cool white CW LED of 4000K or higher. According to one example, each of the respective WW LEDs and CW LEDs may be separated from the nearest LED in the adjacent LED group by a first distance D1 or a second distance D2.

[0021] According to an embodiment of the present invention, a plurality of LED groups are distributed on an elongated carrier according to a first configuration, wherein the LEDs in each LED group are arranged together in a unit, i.e., an LED package.

[0022] According to one example, multiple LEDs include direct-emitting LEDs.

[0023] According to one example, the plurality of LEDs comprises n groups, wherein each group includes at least one blue LED, at least one green LED, and one red LED. In this embodiment, each LED group is defined by a region A of radius r.

[0024] According to embodiments of the present invention, a plurality of LEDs include LEDs covered by an encapsulation comprising a light-emitting material, wherein the light-emitting material is configured to convert LED light emitted by the covered LEDs into LED light having one of the peak wavelengths λB, λG, λR of the respective group to which the LEDs belong. The LED light emitted by the covered LEDs into LED light may have at least two peak wavelengths λB, λG, λR of the respective group to which the LEDs belong.

[0025] According to one example, the light-emitting material includes at least one phosphor for converting LED light.

[0026] According to one example, the controller is configured to adjust the luminous flux of the respective LED groups individually.

[0027] According to an embodiment of the present invention, in a lighting device, the ratio λB between the peak wavelengths of two consecutive groups of blue LEDs is... i / λB i+1 The ratio λG between the peak wavelengths of green LEDs from two consecutive groups i / λG i+1 The ratio λR between the peak wavelengths of the red LEDs from two consecutive groups. i / λR i+1At least one of them varies by at least 20% between the first operating mode and the second operating mode, which means that in order to obtain the first operating mode and the second operating mode, the ratio between the peak wavelengths of the two consecutive groups should be separated by at least 20%.

[0028] In a preferred embodiment, the ratio λB i / λB i+1 ,λG i / λG i+1 λR i / λR i+1 At least two of them change between the first operating mode and the second operating mode, and one of the rates of change increases while the other of the rates of change decreases.

[0029] In the embodiments, in the first operating mode OM1, the device light may have a first correlated color temperature CCT1 and a first spectral distribution SD1; in the second operating mode OM2, the device light may have a second correlated color temperature CCT2 and a second spectral distribution SD2; and in the third operating mode OM3, the device light may have a third correlated color temperature CCT3 and a third spectral distribution SD3, wherein... and and And SD1≠SD2≠SD3.

[0030] In the embodiments, in the first operating mode OM1, the device light may have a first correlated color temperature CCT1 and a first spectral distribution SD1; in the second operating mode OM2, the device light may have a second correlated color temperature CCT2 and a second spectral distribution SD2; and in the third operating mode OM3, the device light may have a third correlated color temperature CCT3 and a third spectral distribution SD3, and the device light may have a fourth correlated color temperature CCT4 and a fourth spectral distribution SD4, wherein... and and and and and And SD1≠SD2≠SD3≠SD4.

[0031] In one embodiment, SD1 may have a dominant peak wavelength at a different wavelength than SD2. In another embodiment, SD2 may have a dominant peak wavelength at a different wavelength than SD3. In yet another embodiment, SD3 may have a dominant peak wavelength at a different wavelength than SD4.

[0032] In an embodiment, It can be ≤200K or ≤150K.

[0033] In this embodiment, the lighting device may be an LED light strip, such as a flexible LED light strip.

[0034] In an embodiment, n The first set of blue LEDs may include at least one phosphor-converted blue LED, such as a purple LED with a blue phosphor.

[0035] In an embodiment, n The second set of green LEDs may include at least one phosphor-converted green LED, such as a blue LED with a green phosphor.

[0036] In an embodiment, n The third set of red LEDs may include at least one phosphor-converted red LED, such as a blue LED with a red phosphor.

[0037] In an embodiment, n The first set of blue LEDs may include at least one directly emitting blue LED.

[0038] In an embodiment, n The second set of green LEDs may include at least one direct-emitting green LED.

[0039] In an embodiment, n The third set of red LEDs may include at least one directly emitting red LED.

[0040] According to embodiments of the present invention, a luminaire is provided. The luminaire includes a lighting device according to any of the above embodiments, or an LED lighting device according to any of the above embodiments. A controller may be functionally connected to at least one of a user interface, a sensor, and a clock module. The controller is configured to control the LED based on inputs from the user interface, sensor, or clock module. The luminaire may be elongated. The luminaire may have an elongated light exit window.

[0041] Correlated color temperature (CCT) is a specification of the color appearance of light emitted by a light source, relating its color to the color of light from a reference source when heated to a specific temperature, measured in Kelvin (K).

[0042] Operating mode refers to the configuration of the operating scenario used to activate a specific function.

[0043] Peak wavelength refers to the wavelength at which the spectrum of a light source reaches its maximum value.

[0044] Configuration refers to the arrangement of individual LEDs.

[0045] A controller is any kind of unit or device configured to control LEDs in a lighting device.

[0046] An encapsulation is a structure that at least partially surrounds a carrier or LED. The encapsulation may scatter light or have a phosphor that focuses light into another color.

[0047] LED units refer to LEDs grouped together, clustered, packaged, or adjacent to each other in a unit (such as an LED package). Attached Figure Description

[0048] This and other aspects of the invention will now be described in more detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

[0049] Figure 1 The spectrum according to the prior art is shown schematically.

[0050] Figure 2 The spectrum of an embodiment of the present invention is illustrated schematically.

[0051] Figure 3a , Figure 3b and Figure 3c A lighting device according to an exemplary embodiment of the present invention is illustrated schematically.

[0052] Figure 4a , Figure 4b , Figure 4c , Figure 4d , Figure 4e and Figure 4f Details of a lighting device according to an exemplary embodiment of the present invention are shown schematically.

[0053] Figure 5 An LED lighting device including a lighting apparatus according to an exemplary embodiment of the present invention is illustrated schematically.

[0054] Regarding the accompanying drawings in this disclosure, since the lighting devices to be described include LEDs of various colors and subtle color variations, patterns and pattern densities are used to facilitate understanding of the disclosed concepts in order to meet the requirements of the drawings. Typically, specific blues, greens, and reds are represented by various corresponding patterns, and the density of the patterns indicates subtle color variations. Detailed Implementation

[0055] LED strips can be designed with individual LEDs arranged along axis A at intervals between them, a so-called "pitch" structure. Pitch-configured LEDs can emit white light, such as warm white (WW), or cool white (CW), or red (R), green (G), and blue (B). Another example architecture is the so-called "cluster" architecture, where "RGB cells" are arranged on a carrier, and each RGB cell includes at least one red, at least one green, and at least one blue LED, arranged together in the same physical unit, such as an LED package. Both pitch and cluster architectures have their own advantages. In a pitch configuration, the near-field experience of the emitted light is perceived as smoother, but the temperature distribution along the LED strip is also smoother. Cluster architectures have the disadvantage of speckled appearance, while in a pitch architecture, a disadvantage might be the lack of white light in the near field.

[0056] The visible spectrum of sunlight has wavelengths between approximately 400-750 nm, ranging from below violet to above red. While conventional standard LEDs emit light with a specific peak wavelength, schemes have been proposed to broaden the corresponding peak wavelength of LEDs to achieve more natural light based on human perception. For example, warm white (WW) and cool white (CW) LEDs have been developed by covering the LED with appropriate encapsulation.

[0057] Figure 1 This is a schematic diagram illustrating an example of using a package to cover a blue LED with a peak wavelength λ of 450 nm to convert emitted light with a blue peak wavelength into light with a wider wavelength range between 500 and 700 nm, thereby achieving more natural light in the environment. However, as... Figure 1 As shown, the blue peak was not completely suppressed, and the resulting spectrum has two main peaks: a blue peak at 450 nm and a broader one at approximately 570 nm. This light may be perceived as unnatural and stressful.

[0058] Figure 2 This is a schematic diagram illustrating the resulting spectrum of the lighting device of the present invention according to an exemplary embodiment.

[0059] The lighting device provides light to the device and includes multiple LEDs that emit light with corresponding peak wavelengths. In this embodiment, there are three blue wavelengths λ1, λ2, λ3; three green wavelengths G1, G2, G3; and three red wavelengths R1, R2, R3, which, together with the light emitted by the LEDs, produce a spectrum that will be perceived more naturally by people.

[0060] Some implementations of the lighting device 100 will now be described through various exemplary embodiments.

[0061] refer to Figures 3a-3c , Figures 3a-3c This is a schematic illustration; an illumination device for providing light to the device will now be described according to an exemplary embodiment.

[0062] Figure 3a A lighting device 100 with a pitched design is shown. Multiple LEDs 130 are arranged on an elongated carrier 110. The multiple LEDs 130 include... n A first set 200 of blue LEDs, which are configured to emit first light in a first wavelength range λ1 of 430-490 nm; n A second set 210 of green LEDs is configured to emit second light within a second wavelength range λ2 of 500-590 nm; and n A third set 220 of red LEDs is configured to emit third light within a third wavelength range λ3 of 600-690nm.

[0063] The first set 200 of blue LEDs includes n types of blue LEDs, each type being suitable for emitting its own peak wavelength λB. i Blue light of i=1,…,n. Different peak wavelengths λB i Let i=1,…,n be distinct, such that for j = 1 ,…, n and i ≠ j ,λB i ≠λB i Accordingly, the second set 210 of green LEDs includes n types of green LEDs, each type being adapted to emit its own peak wavelength λG. i Green light of i=1,…,n. Different peak wavelengths λG i Let i=1,…,n be distinct, such that for j = 1 ,…, n and i ≠ j ,λG i ≠λG j The third set 220 of red LEDs includes n types of red LEDs, each type being adapted to emit its own peak wavelength λR. i Red light of i=1,…,n. Different peak wavelengths λR i Let i=1,…,n be distinct, such that for j = 1 ,…, n and i ≠ j ,λR i ≠λRj .

[0064] In this embodiment, for the blue LED 200, n=3, there are three types of blue LEDs suitable for emitting blue light with a peak wavelength λB1, another type suitable for emitting blue light with a peak wavelength λB2, and yet another type suitable for emitting blue light with a peak wavelength λB3. The peak wavelengths λB1, λB2, and λB3 are different from each other, but all fall within a first wavelength range λ1 of 430-490 nm. Similarly, for the green LED 210, n=3, and three types of green LEDs suitable for emitting green light with their respective peak wavelengths λG1, λG2, and λG3, which are different from each other, but all fall within a second wavelength range λ2 of 500-590 nm. Correspondingly, for the red LED 220, n=3, and three types of red LEDs suitable for emitting red light with their respective peak wavelengths λR1, λR2, and λR3, which are different from each other, but all fall within a third wavelength range λ3 of 600-690 nm.

[0065] In the above embodiments, for example, the difference in peak wavelength λ between two corresponding LEDs from two consecutive groups 400 between two blue LEDs λB1 and λB2 or λB2 and λB3 can be as low as Δλ ≥ 25 nm, preferably Δλ ≥ 20 nm, more preferably Δλ ≥ 15 nm, and most preferably as low as Δλ ≥ 10 nm. The corresponding difference in peak wavelength Δλ also applies to two corresponding green LEDs from consecutive groups, each and both.

[0066] Multiple LEDs including n Groups 400, each group comprising at least one blue LED, at least one green LED, and one red LED. In this embodiment, LEDs 130 are arranged according to a pitch configuration 410, with groups 400 arranged sequentially along a carrier 110, wherein two consecutive LEDs 130 are separated by a distance D2. The distance between two consecutive LEDs 130 is equal along the carrier 110, regardless of whether the two consecutive LEDs 130 belong to the same group 400 or are two adjacent groups 400. Typically, the distance D2 is at least 1 mm, or at least 2 mm, for example, at least 3 mm.

[0067] In this embodiment, the LEDs 130 of the pitch configuration 410 are configured as follows: R1, G1, B1, R2, G2, B2, R3, G3, B3, R1, G1, B1, R2, G2, B2, R3, G3, B3, R1, G1, B1, R2, G2, B2, R3, G3, B3, ..., as shown. Figure 3a As shown.

[0068] It should be noted that the aforementioned lighting device 100 is not limited to n=3 types of LEDs for the corresponding colors of red, green, and blue. For each wavelength range defined above, i.e., color, the lighting device can be designed to have any appropriate number of LED types. The number of LED types can also vary between different wavelength ranges. For example, the designer may choose to appropriately design a lighting device 100 with three types of blue LEDs λB1, λB2, and λB3, four types of green LEDs λG1, λG2, λG3, and λG4, or two types of red LEDs λR1 and λR2, within the disclosed concept. In this alternative design, the order would be changed to: R1, G1, B1, R2, G2, B2, R3, G3, B1, R1, G4, B2, R2, G1, B1, R3, G2, B2, R1, G3, B1, R2, G4, B2, R3, G1, B1, etc.

[0069] Furthermore, the lighting device 100 includes a controller (not shown) coupled to a plurality of LED groups 400. The controller 300 is configured to control the operation of each LED 130 in the plurality of groups 400. The controller is configured to control the LEDs according to at least two operating modes OM. In a first operating mode OM1, the device light has a first correlated color temperature CCT1 and a first spectral distribution SD1, and in a second operating mode OM2, the device light has a second correlated color temperature CCT2 and a second spectral distribution SD2. Using the lighting device disclosed above, for two selected spectral distributions SD1, SD2, the difference between CCT1 and CCT2 can be as small as less than 300K, i.e. Furthermore, SD1 ≠ SD2. It should be noted that the disclosed concepts are not limited to this, and in practice, even smaller differences in correlated color temperature can be achieved. For example, The differences can be preferred. It could be better, and This is the optimal choice. The spectral distribution SD1 and SD2 can be set by controlling the luminous flux or radiant power of each LED group 400.

[0070] For example, for an LED light strip with three colors R, G, and B, and three variations 1, 2, and 3 for each color, the first spectral distribution SD1 can be set by controlling the luminous flux according to the following: R1=80%; R2=20%; R3=0%; G1=50%; G2=40%; G3=10%; and B1=50%; B2=50%; B3=0%. Correspondingly, the second spectral distribution SD2 can be set by controlling the luminous flux according to the following: R1=40%; R2=30%; R3=30%; G1=40%; G2=30%; G3=30%; and B1=60%; B2=30%; B3=10%. By appropriately controlling the luminous flux or radiant power among the groups 400, adapted or “customized” device light can be achieved, and the user will be able to appropriately obtain the desired device light by selecting the appropriate operating mode OM.

[0071] Since the emission peak wavelengths are different, the luminous flux can vary by definition because it depends on the distance of the peak relative to the eye sensitivity curve. However, it may be desirable to apply further corrections. For example, if a spectrum with a large amount of R2 is required, only a small amount of R1 should be added. Since R1 is clustered with B1 and G1, if the R1-G1-B1 cluster is required to produce white light, the amounts of B1 and G1 also need to be reduced. In another alternative, the clustered RGB LEDs may not emit white light (or emit white light at a certain distance from BBL); in this case, corrections for G2 and B2 may not be necessary.

[0072] In the aforementioned pitch configuration 410, each group 400 includes a blue LED, a green LED, and a red LED. However, to achieve further adapted emitted light, the lighting device can be alternatively designed within the disclosed concept.

[0073] Figures 3b-3c Two alternative designs for the lighting device 100 described above are shown. These two embodiments are based on reference numerals. Figure 3a The described embodiment, and additional LEDs have been added to LED group 400. Figure 3b In this setup, WW (warm white) LEDs have been added to each of the 400 LED groups. Typically, LED strips use an RGB-W architecture, such as RGB-WW (warm white). Adding white LEDs further improves light quality (e.g., CRI, color rendering index) due to the different peaks in white light. WW is typically used because of its high red content in white light. Of course, a combination of WW and CW (cool white) will further improve light quality, as there are optimal designs for high CCT.

[0074] exist Figure 3cIn this configuration, WW LEDs are added to each odd-numbered LED group of 400, and CW (cool white) LEDs are added to each even-numbered LED group of 400. Typically, WW LEDs emit light between 2700-3000K, while CW LEDs emit light above 4000K.

[0075] Even though the above embodiments have been described for a lighting device with a pitched configuration 410, wherein the LEDs 130 are arranged at a distance D2 between adjacent LEDs 130, the concept of the invention is not limited to a fixed configuration. Alternatively, the concept of the invention can also be applied to clustered configurations of LEDs, which will be defined below in conjunction with relevant example embodiments.

[0076] refer to Figures 4a-4f , Figures 4a-4f These are illustrative diagrams, and some exemplary embodiments relating to the embodiments disclosed above will now be described. For illustrative purposes, the lighting device is shown in a non-limiting manner with respect to three corresponding LED groups. However, it should be noted that the concept of the invention is not limited to a specific number of LED groups. The carrier may include additional groups, and, where appropriate, progress along its axis in a suitable number of groups.

[0077] It should be understood that lighting devices typically include other components for optimal performance during operation, such as the control processor shown in the above figures. However, in the following figures, any such components are omitted to focus on the concept of the invention and for ease of understanding.

[0078] Figure 4a A lighting device 100 is schematically shown, in which LEDs are arranged on a carrier 110 according to a cluster configuration 420. Similarly, the LEDs are arranged in the sequence R1, G1, B1, R2, G2, B2, R3, G3, B3. The centers of two adjacent groups 400 are separated by a distance D1. Each corresponding group 400 includes one blue, one green, and one red LED, but the light emitted by the corresponding color LEDs in the two groups differs slightly. For example, the emitted light from the two blue LEDs B1 and B2 differs at a wavelength of approximately 20 μm. Similarly, the light emitted by the blue LEDs B2 and B3 differs accordingly in wavelength. (See diagrams below.) Figure 4a and Figure 4c As shown, the LEDs in each corresponding group 400 are arranged together such that the distance r between the LEDs within a group 400 is less than the distance D1 between groups 400. For example, if a group of LEDs 400 is arranged within a radius of 2 mm and the distance D1 between groups 400 is at least 8 mm, or is arranged within a radius of 3 mm and the distance D1 is at least 10 mm, then the requirement D1 > 3r is satisfied.

[0079] Figure 4bIt schematically shows the relationship with Figure 4a A similar lighting device 100 is shown, but the difference is that the LEDs are arranged in a pitch configuration 410 rather than a cluster configuration.

[0080] Figure 4c It schematically shows, as Figure 4a The related lighting device is shown. However, in this example, the LEDs are arranged differently in group 400 to achieve flexible and adaptable light. In this embodiment, the LEDs are arranged as B3, G1, and R1 in the left group, B2, G2, and R2 in the middle group, and B1, G3, and R3 in the right group. Therefore, by appropriately placing the LEDs in a suitable manner, the resulting light experience can be adapted to the user's needs. Typically, manufacturers can provide lighting devices with different configurations (e.g., pitched or clustered configurations) and different arrangements of LEDs within groups to different categories of users.

[0081] To achieve a more appropriate and user-friendly lighting experience, the intensity of LED lighting can be varied.

[0082] Figure 4d This schematically illustrates the case where all groups have the same lighting intensity.

[0083] Figure 4e This schematically illustrates another scenario where lighting intensity varies between groups.

[0084] Figure 4f This schematically illustrates yet another case of varying lighting intensity within a group.

[0085] Users can change and set the intensity by selecting the desired and appropriate operating modes such as OM1, OM2, etc.

[0086] The above-described embodiments have schematically illustrated pitched and clustered configurations, respectively. However, the scope of the invention also covers combinations of pitched and clustered configurations. For example, the lighting device 100 of exemplary embodiments related to some of the embodiments described above may include a combination of pitched and clustered configurations.

[0087] Regarding the cluster configuration 420, for illustrative purposes, the LED group 400 is shown as LEDs arranged side by side. However, in practice, a group of LEDs is typically located in the same physical unit, for example, three sub-LEDs arranged together and sealed by a package. The package may include a luminescent material such as phosphorus. The physical unit of such a package is defined by a region A of radius r.

[0088] The controller is used to individually control B1, B2, [B3], G1, G2, [G3], R1, R2, [R3]. The controller is configured to control the LED strip using a central processing unit (CPU), such that in the first operating mode, all clusters (RGB)... n Or pitch type (RGB) n The groups emit white light with the same correlated color temperature (i.e., normal LED strip mode): CCT1(BL1+GL1+RL1) = CCT2(BL2+GL2+RL2) = CCT3(BL3+GL3+RL3). BL1 is the light from B1, GL1 is the light from G1, RL1 is the light from R1, and the resulting light from the group B1+G1+R1 realizes CCT1. Correspondingly, BL2, GL2, and RL2 are the light from the corresponding B2, G2, and R2, which together realize CCT2, etc., as another group.

[0089] In other operating modes, by using different color distributions for different groups, all different possible / optimized spectral compositions can produce different optimized spectra. For example, the resulting light from LED groups with different spectral distributions (SD) can be controlled by the CPU to obtain the same desired correlated color temperature (CCT) for various operating modes. That is, for example, in the third operating mode, the desired CCT can be achieved for two different groups of LEDs with varying spectral distributions.

[0090] In one embodiment, all groups emit light at different luminous fluxes to provide continuous light.

[0091] In another exemplary embodiment, the LED strip includes direct-emitting LEDs and phosphor-converting LEDs, particularly for green and red.

[0092] In another exemplary embodiment, one of the following architectures is used:

[0093] (R1G1B1-R2G2B2)n or (R1-G1-B1-R2-G2-B2)n

[0094] (R1G1B1-R2G2B2-R3G3B3)n or (R1-G1-B1-R2-G2-B2-R3-G3-B3)n

[0095] (R1G1B1-R2G2B2-R3G3B3-R2G2B2)n or (R1-G1-B1-R2-G2-B2-R3-G3-B3-R2-G2-B2)n

[0096] As shown by the exemplary embodiments disclosed above, the disclosed LED strip can be used as a normal LED strip or as a light emitter based on the LED strip, in which all different possible spectral compositions can be made.

[0097] The peak emission wavelengths of the RGB LEDs are different between the groups. However, it is not necessary that R2 > R1, B2 > B1, and G2 > G1. It is also possible to have R2 > R1, B2 > B1, while G2 < G1. Other combinations are also possible.

[0098] Each LED is associated with a specific fixed peak wavelength. By changing the different amounts of R, G, and B light, only the color point of the RGB LED cluster can be adjusted.

[0099] Figure 5 An LED lighting device 500 including a lighting device 100 according to an exemplary embodiment of the present invention is schematically shown. The LED lighting device 500 further includes a cover 510 and an electrical connector 520. The cover 510 includes at least partially transparent material, wherein the cover 510 at least partially surrounds the lighting device 100, and the electrical connector 520 is connected to the lighting device 100 for supplying power to the plurality of LEDs of the lighting device 100.

[0100] The lighting device of some of the above exemplary embodiments can be designed as an LED lighting device, wherein the device light in the first operation mode is white light having a correlated color temperature in the range of 2000K to 6500K and a color rendering index (CRI) of at least 80, and the device light in the second operation mode is white light having a correlated color temperature in the range of 2000K to 6500K and a CRI of at least 80. Those skilled in the art will recognize that the present invention is in no way limited to the above preferred embodiments. On the contrary, many modifications and variations are possible within the scope of the appended claims.

Claims

1. An illumination device (100) for providing light to a device, comprising: Slender carrier (110). Multiple light-emitting diodes (LEDs) (130) are arranged on the elongated carrier (110). The plurality of LEDs includes: have n A first set (200) of blue LEDs is configured to emit first light within a first wavelength range λ1 from 430 nm to 490 nm, wherein, for any blue LED i , i=1 ,…, n ,in n ≥3, blue LED i Emission peak wavelength λB within the first wavelength range λ1 i ,for j = 1 ,…, n and i≠j The peak wavelength λB i ≠λB j ; have n A second set (210) of green LEDs is configured to emit second light within a second wavelength range λ2 from 500 nm to 590 nm, wherein, for any green LED i , i=1 ,…, n ,in n ≥3, Green LED i The peak emission wavelength λG is within the second wavelength range λ2. i ,for j = 1 ,…, n and i≠j The peak wavelength λG i ≠λG j , have n A third set (220) of red LEDs is configured to emit third light within a third wavelength range λ3 from 600 nm to 690 nm, wherein, for any red LED i , i=1 ,…, n ,in n ≥3, Red LED i The emission peak wavelength λR is within the third wavelength range λ3. i ,for j = 1 ,…, n and i≠j The peak wavelength λR i ≠λR j , The plurality of LEDs include n 400 LED groups, where each group: k=1 ,…, n ,in n ≥3, including: At least one blue LED k At least one green LED k and at least one red LED k , And multiple of the LED groups include one of the following: The first configuration (410) wherein each LED group is confined within a region A having a radius r, and wherein the plurality of LED groups are distributed on the elongated carrier such that any two consecutive LED groups are separated by at least a first distance D1, where D1 > 3·r, and The second configuration (420) wherein the LED group is arranged in at least one separately arranged LED array, wherein any two consecutive LEDs have different colors and are separated by at least a second distance D2, and A controller, coupled to the plurality of LED groups, is configured to individually control the operation of each LED in the plurality of LED groups, and wherein the controller is configured to adjust two consecutive LED groups to the correlated color temperature (CCT) in a first operating mode, and to control one of the following in a second operating mode: The first configuration, and The second configuration, In the first operating mode OM1, the device light has a first correlated color temperature CCT1 and a first spectral distribution SD1, and in the second operating mode OM2, the device light has a second correlated color temperature CCT2 and a second spectral distribution SD2. And SD1≠SD2.

2. The lighting device according to claim 1, wherein the difference D in the correlated color temperature (CCT) between any two LED groups CCT satisfy .

3. The lighting device according to any one of the preceding claims, wherein the luminous flux of each group in the first operating mode is different from that in the second operating mode.

4. The lighting device according to any one of the preceding claims, wherein along the axis A of the elongated carrier (110), the peak wavelength λB of the (k+1)th group... k+1 ,λG k+1 ,λR k+1 Each is higher than the corresponding peak wavelength λB of the kth group (400) preceding it. k ,λG k ,λR k .

5. The lighting device according to any one of claims 1-3, wherein along the axis A of the elongated carrier (110), the peak wavelength λB of the (k+1)th group is... k+1 ,λG k+1 ,λR k+1 The peak wavelength λB is alternately higher and lower than the corresponding peak wavelength λB of the kth group (400) in the preceding adjacent group. k ,λG k ,λR k .

6. The lighting device according to claim 4 or 5, wherein the peak wavelengths of two corresponding LEDs from two consecutive groups (400) differ by a phase value Δλ, wherein Δλ ≥ 20 nm.

7. The lighting device according to claim 5 or 6, wherein the plurality of LED groups are distributed on the elongated carrier according to the second configuration (420), wherein any two consecutive LEDs in any group (400) are separated by a second distance D2, wherein any two consecutive LEDs from different groups (400) are separated by a third distance D3, wherein D3 ≥ D2.

8. The lighting device according to claim 7, wherein the LED group (400) is spaced apart by at least one of the following: 2700K to 3000K warm white WW LEDs, and Cool white CW LED with a K higher than 4000K.

9. The lighting device according to claim 4 or 5, wherein the plurality of LED groups are distributed on the elongated carrier according to the first configuration (410), and wherein the LEDs in each LED group (400) are arranged together in a unit.

10. The lighting device (100) according to any one of the preceding claims, wherein the plurality of LEDs comprises LEDs covered by an encapsulation including a light-emitting material, wherein the light-emitting material is configured to convert LED light emitted by the covered LEDs into LED light having a peak wavelength of one of λB, λG, λR of the group to which the respective LEDs belong.

11. The lighting device according to any one of the preceding claims, wherein at least one of the following differs by at least 20% between the first operating mode and the second operating mode: The ratio λB between the peak wavelengths of two consecutive groups (400) of blue LEDs i / λB i+1 , The ratio λG between the peak wavelengths of two consecutive groups (400) of green LEDs i / λG i+1 ,as well as The ratio λR between the peak wavelengths of two consecutive groups (400) of red LEDs i / λR i+1 .

12. The lighting device according to claim 11, wherein the ratio λB i / λB i+1 ,λG i / λG i+1 and λR i / λR i+1 At least two ratios differ between the first operating mode and the second operating mode, and one of the ratios is increased while the other is decreased.

13. The lighting device according to any one of the preceding claims, wherein the device light in the first operating mode is white light having a correlated color temperature (CCT) in the range of 2000K to 6500K and a color rendering index (CRI) of at least 80, and wherein the device light in the second operating mode is white light having a CCT in the range of 2000K to 6500K and a CRI of at least 80.

14. An LED lighting device (500), comprising: The lighting device according to any one of the preceding claims, Cover (510), the cover comprising at least partially transparent material, wherein the cover at least partially surrounds the lighting device, and An electrical connector (520) is connected to the lighting device for supplying power to the plurality of LEDs of the lighting device.

15. A lighting fixture comprising one of the following: The lighting device according to any one of claims 1 to 13, and The LED lighting device according to claim 14, The controller is functionally connected to at least one of a user interface, a sensor, and a clock module, and the controller is configured to control the LED (130) based on inputs from the user interface, the sensor, or the clock module.

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