Sunlight simulating light source, luminaire and dimming method

Abstract

The application provides a sunlight simulation light source, a lamp and a dimming method. The light source comprises a support, an electroluminescent component and a photoluminescent component; the electroluminescent component and the photoluminescent component are arranged on the support, and the photoluminescent component is wrapped outside the electroluminescent component; wherein the luminescent material of the photoluminescent component comprises deep red fluorescent powder; the electroluminescent component is used for emitting first color light, and the photoluminescent component is used for converting the first color light into second color light and emitting; the first color light and the second color light constitute simulated sunlight containing deep red light. The application can make the light source closer to the sunlight spectrum and realize higher sunlight simulation degree.

Description

Technical Field

[0001] This invention relates to the field of light source technology, and in particular to a sunlight simulation light source, a lamp, and a dimming method. Background Technology

[0002] With the continuous evolution of lighting technology, the demand for light-emitting diode (LED) lighting is no longer just about brightness and luminous efficacy, but has gradually evolved to the pursuit of the impact of light sources on human physical and mental health.

[0003] The relevant technologies mainly aim to reduce the amount of low-energy harmful light in the 380nm-500nm range, thereby minimizing damage to retinal cells and achieving a healthy light source configuration. However, since the human eye's perception is highest under sunlight, this method only reduces harmful light in the light source and still reduces the user's perception, affecting the user experience. Summary of the Invention

[0004] This invention provides a sunlight simulation light source, lamp, and dimming method to make the light source closer to the solar spectrum, achieve a higher degree of sunlight fitting, and improve the human eye's perception of things under sunlight.

[0005] In a first aspect, embodiments of the present invention provide a simulated sunlight light source, including a support frame, an electroluminescent component, and a photoluminescent component;

[0006] An electroluminescent component and a photoluminescent component are disposed on the support, and the photoluminescent component is covered on the outside of the electroluminescent component; wherein, the luminescent material of the photoluminescent component includes a deep red phosphor;

[0007] The electroluminescent component is used to emit a first color light, and the photoluminescent component is used to convert the first color light into a second color light and emit it; the first color light and the second color light constitute a fitted sunlight containing deep red light.

[0008] In one possible implementation, the simulated light source further includes at least one reflector.

[0009] The reflector is mounted on the bracket;

[0010] Each reflector is equipped with an electroluminescent component and a photoluminescent component. The reflector is used to reflect the first color light emitted by the electroluminescent component and the second color light converted by the photoluminescent component.

[0011] The first color light emitted by all the electroluminescent components in each reflector and the second color light converted by all the photoluminescent components constitute a simulated sunlight containing deep red light.

[0012] In one possible implementation, when the number of reflectors is greater than one, the first color light and the second color light in each reflector constitute a first composite light, and the first composite light in all reflectors constitutes a continuous spectrum to obtain a fit to sunlight; wherein, the first composite light in at least one reflector contains deep red light.

[0013] In one possible implementation, when the number of reflectors is greater than one, the first color light and the second color light in each reflector constitute a second composite light containing deep red light with different color temperatures, so that the light in all reflectors constitutes a fitted sunlight containing deep red light; wherein the second composite light corresponds to a continuous spectrum with an emission wavelength range from 400 nm to 780 nm.

[0014] In one possible implementation, when the number of reflectors is greater than one, the first color light and the second color light in at least one reflector constitute deep red light, and the first color light and the second color light in the remaining reflectors constitute a third composite light with different color temperatures, so that the light in all reflectors constitutes fitted sunlight containing deep red light; wherein the third composite light corresponds to a continuous spectrum with a emission wavelength range from 400nm to 670nm.

[0015] Alternatively, the first and second color lights in at least one of the reflectors constitute deep red light, and the first and second color lights in the remaining reflectors constitute a second composite light containing deep red light at different color temperatures, so that the light in all the reflectors constitutes fitted sunlight containing deep red light; wherein the second composite light corresponds to a continuous spectrum with a emission wavelength range from 400 nm to 780 nm.

[0016] In one possible implementation, when the number of reflectors is greater than one, the first color light and the second color light in at least one reflector constitute a fourth composite light, and the first color light and the second color light in the remaining reflectors constitute a second composite light containing deep red light of different color temperatures, so that the light in all reflectors constitutes a fitted sunlight containing deep red light; wherein the second composite light corresponds to a continuous spectrum of emission wavelengths from 400nm to 780nm, and the fourth composite light is used to supplement the wavelength range in which the relative luminous intensity of the light constituted by the second composite light of the remaining reflectors is lower than a preset threshold.

[0017] In one possible implementation, the light-emitting chip of the electroluminescent component includes at least one of the following: a near-ultraviolet light chip, a blue light chip, and a near-infrared light chip;

[0018] The luminescent material of the photoluminescent component also includes at least one of the following: blue phosphor, cyan phosphor, green phosphor, and red phosphor.

[0019] In a second aspect, embodiments of the present invention provide a luminaire that simulates sunlight, including a chassis, a light engine module, a bandpass filter and a lampshade, wherein the light engine module includes a control circuit and a simulated sunlight as described in the first aspect or any possible implementation thereof.

[0020] The light engine module is mounted on the chassis.

[0021] The bandpass filter is provided on the optical engine module;

[0022] The lampshade covers the bandpass filter and the light engine module, and the lampshade is detachably connected to the chassis.

[0023] Thirdly, embodiments of the present invention provide a dimming method for a luminaire using a simulated sunlight source, applied to the simulated sunlight source described in the second aspect above; the method includes:

[0024] Obtain the number of light sources participating in dimming in the lamp;

[0025] Calculate the duty cycle of each light source based on the number of light sources and the color coordinates of the target color point for dimming;

[0026] The light from each light source is mixed according to the duty cycle of each light source.

[0027] In one possible implementation, calculating the duty cycle of each light source based on the number of light sources and the color coordinates of the target color point for dimming includes:

[0028] When the number of light sources is 2, the duty cycle of each light source is calculated based on the linear mixing method, the color coordinates of the target color point for dimming, and the color coordinates of the two light sources.

[0029] When the number of light sources is 3, the duty cycle of each light source is calculated based on the Grassmann mixing method, the color coordinates of the target color point for dimming, and the color coordinates corresponding to the three light sources.

[0030] When the number of light sources is greater than 3, the three target light sources closest to the color coordinates of the target color point are determined. Based on the Grassmann mixing method, the color coordinates of the target color point to be dimmed, and the color coordinates corresponding to the three target light sources, the duty cycle of the three target light sources is calculated.

[0031] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows:

[0032] This invention provides an embodiment of a light source by incorporating a deep red phosphor in the photoluminescent component. When the photoluminescent component emits a first color of light, the first color of light excites the deep red phosphor in the photoluminescent component, causing the second color of light to contain deep red light. This results in the simulated sunlight containing sufficient deep red light, supplementing the spectrum of the simulated sunlight and making its spectrum closer to that of sunlight. This improves the fit of the simulated sunlight, thereby enhancing the health of the light source and improving the human eye's perception of objects under sunlight. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a simulated sunlight source provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the spectral configuration of a deep red phosphor provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of another spectral configuration of the deep red phosphor provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of another simulated sunlight light source provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of a lamp that simulates sunlight, according to an embodiment of the present invention.

[0039] Figure 6 This is a schematic diagram of the control circuit in a lamp with dual-channel dimming provided in an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the control circuit in a lamp with three-way dimming provided in an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the control circuit in a four-channel dimming lamp provided in an embodiment of the present invention;

[0042] Figure 9 This is a flowchart illustrating the implementation of a dimming method for a lamp using a simulated sunlight light source, as provided in an embodiment of the present invention.

[0043] Figure 10This is a schematic diagram of the spectrum after dimming under different parameters provided in the embodiments of the present invention. Detailed Implementation

[0044] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0046] Figure 1 The diagram illustrates a structural schematic of a simulated sunlight source provided in an embodiment of the present invention. The simulated sunlight source includes a support 11, an electroluminescent component 12, and a photoluminescent component 13. The electroluminescent component 12 and the photoluminescent component 13 are disposed on the support 11, with the photoluminescent component 13 covering the outside of the electroluminescent component 12. The luminescent material of the photoluminescent component 13 includes a deep red phosphor. The electroluminescent component 12 emits a first color of light, and the photoluminescent component 13 converts the first color of light into a second color of light and emits it. The first color of light and the second color of light constitute a simulated sunlight source containing deep red light.

[0047] In this embodiment, when the voltage in the electroluminescent component 12 exceeds the corresponding electroluminescence threshold, the electroluminescent component 12 can emit a first color light; since the photoluminescent component 13 is wrapped around the electroluminescent component 12, the first color light emitted by the electroluminescent component 12 can excite the photoluminescent component 13, causing the photoluminescent component 13 to emit a second color light, thereby mixing the first color light and the second color light to form a simulated sunlight.

[0048] Here, the electroluminescent component 12 is fixed on the bracket 11, and the luminescent material of the photoluminescent component 13 can be a mixture of multiple phosphors containing a deep red phosphor, which is uniformly mixed and covers the outside of the electroluminescent component 12. In this embodiment, multiple phosphors can be uniformly mixed to ensure that each phosphor in the photoluminescent component 13 can emit light fully, reducing the problem of partial color spots in the photoluminescent component 13.

[0049] When the deep red phosphor included in the luminescent material of the photoluminescent component 13 is excited, the deep red phosphor can emit deep red light, which can make the second color light contain deep red light, thereby enhancing the luminescence intensity of red light and deep red light, and thus making the fitted sunlight contain sufficient deep red light, so that the spectrum of the fitted sunlight is closer to the real sunlight.

[0050] Optionally, the peak wavelength range of the deep red phosphor emission is 600nm-1000nm, and the half-width at half-maximum (WWHM) range is 35nm-160nm. The peak wavelength and WWHM of the deep red phosphor emission can be selected within the above range according to the actual required values. For example, see [reference needed]. Figure 2 The diagram shows a spectral configuration of light emitted by a deep red phosphor. Figure 2 The image shows the spectral configuration of a deep red phosphor with a peak wavelength of 710 nm and a full width at half maximum (FWHM) of 67 nm. Figure 2 The horizontal axis represents the wavelength of the deep red phosphor emission (in nm), and the vertical axis represents the relative luminous intensity of the deep red phosphor emission; see also [link to relevant documentation]. Figure 3 The diagram shows another spectral configuration of the emission of the deep red phosphor. Figure 3 The image shows the spectral configuration of a deep red phosphor with a peak wavelength of 750 nm and a full width at half maximum (FWHM) of 117 nm. Figure 3 The horizontal axis represents the wavelength of the deep red phosphor emission in nm, and the vertical axis represents the relative luminous intensity of the deep red phosphor emission.

[0051] In addition, the simulated light source may also include glue and electrodes. In this embodiment, glue can be used to fix and connect the various parts of the simulated light source, and electrodes can be brought out to power the electroluminescent components.

[0052] In this embodiment of the invention, a deep red phosphor is provided in the photoluminescent component 13 of the light source. When the electroluminescent component 12 emits a first color light, the first color light can excite the deep red phosphor in the photoluminescent component 13, so that the second color light contains deep red light. This makes the fitted sunlight contain sufficient deep red light, supplements the spectrum of the fitted sunlight, makes the spectrum of the fitted sunlight closer to sunlight, improves the fitting degree of the fitted sunlight, and thus improves the health of the light source.

[0053] In one possible implementation, the light-emitting chip of the electroluminescent component 12 includes at least one of the following: a near-ultraviolet light chip, a blue light chip, and a near-infrared light chip; the light-emitting material of the photoluminescent component also includes at least one of the following: blue phosphor, cyan phosphor, green phosphor, and red phosphor.

[0054] In this embodiment, the electroluminescent component 12 includes at least one light-emitting chip. The light-emitting chip of the electroluminescent component 12 is mainly selected as a near-ultraviolet light chip or a blue light chip, which can excite the photoluminescent component 13 to emit light. In the specific configuration of the electroluminescent component 12, it can be a near-ultraviolet light chip with different emission wavelengths, a near-ultraviolet light chip with the same emission wavelength, a blue light chip with different emission wavelengths, a blue light chip with the same emission wavelength, or a combination of at least one blue light chip and at least one near-ultraviolet light chip.

[0055] In this embodiment, if the components of the fitted sunlight composed of the first color light and the second color light lack red light or deep red light, a near-infrared light chip can be added to increase the intensity of red light and deep red light in the final fitted sunlight.

[0056] Here, the emission wavelength range corresponding to the near-ultraviolet light chip can be 300nm-380nm or 380nm-410nm, etc., the emission wavelength range corresponding to the blue light chip can be 410nm-480nm, and the near-infrared light chip can be a narrowband deep red light chip with a corresponding emission wavelength range of 650nm-780nm.

[0057] The photoluminescent component 13 also includes at least one phosphor, which may include one phosphor in addition to the deep red phosphor, or it may include multiple different phosphors in addition to the deep red phosphor. All selected phosphors are mixed to form the photoluminescent component.

[0058] In this embodiment, due to the high cost of blue phosphor, and considering the manufacturing cost of the light source and subsequent light source dimming, one or more of cyan, green, and red phosphors can be mainly used. For example, cyan, green, and red phosphors can be selected simultaneously, and deep red, cyan, green, and red phosphors can be mixed to form a photoluminescent component.

[0059] Here, the peak wavelength range of cyan phosphor emission can be 480nm-500nm, and the half-width at half-maximum (WHM) range can be ≤26nm; the peak wavelength range of green phosphor emission can be 520nm-560nm, and the WHM range can be ≥60nm; the peak wavelength range of red phosphor emission can be 620nm-650nm, and the WHM range can be ≥60nm. The specific composition of the phosphor can be nitrides, oxides, fluorides, fluorine oxides, and sulfides, etc.

[0060] In one possible implementation, see Figure 4The diagram shows another type of simulated sunlight source. The simulated light source also includes at least one reflector cup 14 (two reflectors are shown as an example in the figure). The reflector cup 14 is mounted on the support 11. Each reflector cup 14 contains an electroluminescent component 12 and a photoluminescent component 13. The reflector cup 14 is used to reflect the first color light emitted by the electroluminescent component 12 and the second color light converted by the photoluminescent component 13. The first color light emitted by all the electroluminescent components 12 and the second color light converted by all the photoluminescent components 13 in each reflector cup 14 constitute a simulated sunlight containing deep red light.

[0061] In this embodiment, at least one reflector cup 14 can be provided in the simulated light source. Each reflector cup 14 is provided with an electroluminescent component 12 and a photoluminescent component 13. The reflector cup 14 can reflect the first color light and the second color light in the reflector cup 14 and converge the light in the reflector cup.

[0062] If a reflector cup 14 is set in the simulated light source, the reflector cup 14 can be set on the bracket 11, and the electroluminescent component 12 and the photoluminescent component 13 can be set inside the reflector cup 14.

[0063] Here, when the simulated light source includes a reflector cup, the color temperature range of the simulated light source can be 2700K-6500K, for example, any of the following: 2700K, 3000K, 3500K, 4000K, 5000K, 5700K and 6500K.

[0064] If multiple reflectors 14 are set in the simulated light source, the multiple reflectors 14 can be placed at different positions on the bracket 11. Each reflector 14 reflects the first color light and the second color light inside it, and the light inside all the reflectors 14 constitutes the light of the simulated light source. For example, the multiple reflectors 14 can be arranged in a row, or in a triangle, or in a rectangle, etc.

[0065] Here, the light-emitting material of the photoluminescent component 13 in at least one reflector cup 14 includes deep red phosphor, that is, the light in at least one reflector cup 14 contains deep red light. Then, by adjusting the light in each reflector cup 14, a fitted sunlight containing deep red light is obtained.

[0066] In the simulated light source, the power ratio of light with a wavelength range of 780nm-1000nm to that with light with a wavelength range of 380nm-1000nm is less than or equal to 15%, and the infrared radiation energy is far less than 100W / m. 2 It meets the exemption level in the standard and is harmless to the human body.

[0067] Optionally, in this embodiment, when the number of reflectors 14 is greater than one, the first color light and the second color light in each reflector 14 constitute a first composite light, and the first composite light in all reflectors 14 constitutes a continuous spectrum to obtain a fitted sunlight; wherein, at least one of the first composite light in a reflector 14 contains deep red light.

[0068] In this embodiment, when multiple reflectors 14 are provided in the simulated light source, the light in at least one reflector 14 contains deep red light to ensure that the simulated sunlight contains deep red light, and the light-emitting material of the photoluminescent component 13 in the corresponding reflector 14 contains deep red phosphor.

[0069] Here, the color of the light in each reflector 14 can be the same or different, forming a continuous spectrum to match sunlight. For example, the first composite light can be a combination of cyan and green light, or a combination of red and dark red light, or a combination of cyan, green, and red light, etc. The first composite light in each reflector 14 can be configured according to the dimming requirements. Correspondingly, a corresponding phosphor is set in the photoluminescent component 13 in each reflector 14 so that the reflector 14 emits light of the corresponding color.

[0070] Optionally, in this embodiment, when the number of reflectors is greater than one, the first color light and the second color light in each reflector constitute a second composite light containing deep red light with different color temperatures, so that the light in all reflectors constitutes a fitted sunlight containing deep red light; wherein, the second composite light corresponds to a continuous spectrum with a emission wavelength range from 400nm to 780nm.

[0071] In this embodiment, when multiple reflectors 14 are provided in the simulated light source, a second composite light containing deep red light with an emission wavelength range from 400nm to 780nm can be provided in each reflector 14 to ensure that the simulated light source can emit the required simulated sunlight. The light in each reflector 14 can be a second composite light with a different color temperature. By dimming the light in each reflector 14, the simulated sunlight emitted by the simulated light source can be adjusted to achieve different color temperatures.

[0072] Here, the light-emitting material of the photoluminescent component in each reflector cup 14 can be composed of a mixture of phosphors of various colors, including deep red phosphor, so that the reflector cup 14 can emit a second composite light containing deep red light with a wavelength range from 400nm to 780nm.

[0073] Optionally, in this embodiment, when the number of reflectors 14 is greater than one, the first color light and the second color light in at least one reflector 14 constitute deep red light, and the first color light and the second color light in the remaining reflectors 14 constitute a third composite light with different color temperatures, so that the light in all reflectors 14 constitutes fitted sunlight containing deep red light; wherein, the third composite light corresponds to a continuous spectrum with a emission wavelength range from 400nm to 670nm.

[0074] Alternatively, the first and second color light in at least one of the reflectors constitute deep red light, and the first and second color light in the remaining reflectors constitute a second composite light containing deep red light of different color temperatures, so that the light in all the reflectors constitutes a fitted sunlight containing deep red light; wherein the second composite light corresponds to a continuous spectrum with a emission wavelength range from 400 nm to 780 nm.

[0075] In this embodiment, at least one reflector cup may contain deep red light to ensure that the light emitted by the simulated light source contains deep red light, so that the spectrum of the simulated light source's fitted sunlight is closer to that of real sunlight, thereby improving the fitting degree of the fitted sunlight.

[0076] The light in the remaining reflectors 14 can be a second composite light of different color temperatures or a third composite light of different color temperatures, so that the light from the simulated light source forms a continuous spectrum, constituting a simulated sunlight. Here, the remaining reflectors 14 can also be configured as follows: the light in some of the reflectors 14 can be a second composite light of different color temperatures, and the light in the other part of the reflectors 14 can be a third composite light of different color temperatures.

[0077] Optionally, when the number of reflectors is greater than one, the first color light and the second color light in at least one reflector constitute a fourth composite light, and the first color light and the second color light in the remaining reflectors constitute a second composite light containing deep red light of different color temperatures, so that the light in all reflectors constitutes a fitted sunlight containing deep red light; wherein, the second composite light corresponds to a continuous spectrum of emission wavelengths from 400nm to 780nm, and the fourth composite light is used to supplement the wavelength range in which the relative luminous intensity of the light constituted by the second composite light in the remaining reflectors is lower than a preset threshold.

[0078] In this embodiment, due to the different configurations of the electroluminescent components 12 and photoluminescent components 13 within the reflector cup 14, the energy of light in different emission wavelength ranges within each reflector cup 14 varies, which may lead to color differences in the final fitted sunlight. Therefore, a fourth composite light is used to supplement the light in the wavelength range with energy below a preset threshold, making the spectrum of the fitted sunlight from the simulated light source closer to real sunlight. The preset threshold can be any value between 0.5 and 1.0; for example, it can be 0.5, 0.6, 0.75, 0.8, or 1.0, etc.

[0079] For example, when the simulated light source includes a reflector, the relevant parameters of the simulated light source at different color temperatures are shown in Table 1 below:

[0080] Table 1 contains the relevant parameters of a simulated light source with a reflector.

[0081]

[0082]

[0083] In Table 1, GFC represents the Goodness-of-Fit Coefficient, CRI represents the Color Render Index, MC represents the Match Coefficient, Rf represents color fidelity, Rg represents color saturation, SDCM (ANSI) represents color tolerance, and NIRC is an evaluation index for a simulated sunlight light source provided in this application, the specific calculation formula of which is as follows: In the formula, P test P represents the spectrum of the simulated light source. sunlight This represents the spectrum of a standard daylight illuminator corresponding to the current color temperature in the simulated light source, where 670 indicates an emission wavelength of 670 nm and 780 indicates an emission wavelength of 780 nm.

[0084] Table 1 above provides details on the various parameters that can be achieved when the simulated light source includes a reflector.

[0085] When the simulated light source contains two reflectors, the light in each reflector can be represented as shown in Table 2 below:

[0086] Table 2 contains the light combinations of each reflector in a simulated light source with two reflectors.

[0087] combination The light contained within reflector A The light contained within reflector B 1 Cyan + Green Red + Dark Red 2 blue Green + Red + Dark Red 3 green Cyan + Red + Dark Red 4 red Cyan + Green + Dark Red 5 Dark red Cyan + Green + Red 6 Cyan + Red Green + Dark Red 7 Cyan + Dark Red Green + Red 8 Green + Red Cyan + Dark Red 9 Cyan + Green + Dark Red Cyan + Red 10 Cyan + Green + Red + Dark Red Cyan + Green + Red + Dark Red 11 3000K Second Composite Light 5000K Second Composite Light

[0088] When the simulated light source contains three reflectors, the light in each reflector can be represented as shown in Table 3 below:

[0089] Table 3 contains the light combinations of each reflector in a simulated light source with three reflectors.

[0090] combination The light contained within reflector A The light contained within reflector B The light contained within reflector C 1 Low color temperature third composite light High color temperature third composite light The third composite light of deep red light 2 Low color temperature second composite light Second composite light with intermediate color temperature High color temperature second composite light 3 First composite light 1 First composite light 2 First composite light 3 4 Low color temperature second composite light Fourth composite light High color temperature second composite light

[0091] Here, low color temperature light refers to light with a color temperature value below 3300K, intermediate color temperature light refers to light with a color temperature value between 3300K and 5300K, and high color temperature light refers to light with a color temperature value above 5300K. First composite light 1, first composite light 2, and first composite light 3 can be the same first composite light or different first composite lights. First composite light 1, first composite light 2, and first composite light 3 constitute a continuous spectrum containing deep red light.

[0092] When the simulated light source contains four reflectors, the light in each reflector can be represented as shown in Table 4 below:

[0093] Table 4 shows the light combinations for each reflector in a simulated light source containing three reflectors.

[0094]

[0095] In Table 4 above, the first composite light 1, the first composite light 2, the first composite light 3 and the first composite light 4 can be the same first composite light or different first composite lights. The first composite light 1, the first composite light 2, the first composite light 3 and the first composite light 4 constitute a continuous spectrum containing deep red light.

[0096] Tables 2 to 4 above provide exemplary examples of the combinations of light from each reflector when there are multiple reflectors. These are only some of the possible combinations; other colors or color temperatures of light can also be combined to create a simulated sunlight containing deep red light.

[0097] In one embodiment, the simulated light source can be implemented as a filament, which includes a substrate, an electroluminescent component, and a photoluminescent component. For example, the substrate material can be any of the following: ceramic, metal, glass, and sapphire, etc.

[0098] This invention, through its embodiment, incorporates deep red phosphor in the photoluminescent component of a light source. When the electroluminescent component emits a first color of light, this light excites the deep red phosphor, causing the second color of light to include deep red light. This, in turn, ensures that the simulated sunlight contains sufficient deep red light, supplementing the spectrum of the simulated sunlight and making it closer to real sunlight, thus improving the fit and overall health of the light source. Furthermore, by incorporating reflectors in the simulated light source, each containing both an electroluminescent component and a photoluminescent component, different light can be emitted from each reflector. By adjusting the brightness of each reflector, the simulated light source can simulate simulated sunlight with different color temperatures, meeting various light requirements. Adjusting the light within each reflector allows for adjustments to address issues such as damaged electroluminescent components or phosphor failure in some reflectors, ensuring the simulated sunlight closely approximates real sunlight.

[0099] Figure 5 The diagram shows a schematic of the structure of a lamp that simulates sunlight according to an embodiment of the present invention. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For details not described in detail, please refer to the corresponding embodiment of the sunlight simulation light source described above.

[0100] like Figure 5 As shown, the luminaire of the sunlight simulation light source includes a chassis 51, a light engine module 52, a bandpass filter 53, and a lampshade 54, wherein the light engine module 52 includes a control circuit and a sunlight simulation light source of any possible implementation as described in the above embodiments of the sunlight simulation light source.

[0101] A light engine module 52 is mounted on a chassis 51; a bandpass filter 53 is mounted on the light engine module 52; a lamp cover 54 covers the bandpass filter 53 and the light engine module 52, and the lamp cover 54 is detachably connected to the chassis 51.

[0102] In this embodiment, the light engine module 52 and the bandpass filter 53 can be fixed and protected by the chassis 51 and the lamp cover 54. The bandpass filter 53 is positioned above the light engine module 52, allowing light of the target wavelength range to pass through, thereby ensuring that the sunlight simulation light source emits only the simulated sunlight within the target wavelength range, guaranteeing the accuracy and safety of the simulated sunlight.

[0103] Here, the light engine module 52 includes a control circuit and a simulated light source. The control circuit can dim and adjust the color of the light in the simulated light source to adjust the light emitted by the lamp so that the lamp can emit the light that is actually needed.

[0104] See Figure 6 The schematic diagram shown illustrates the control circuitry of the luminaire during dual-channel dimming, including an input electromagnetic interference (EMI) filter and rectifier circuit, a constant current dimming control circuit, a CCT color temperature control circuit, an auxiliary power supply circuit, and an RF communication module. The AC voltage is connected via VIN-AC, and then filtered and rectified by the EMI and rectifier circuits to provide the necessary current and voltage for subsequent circuits, ensuring the luminaire operates normally.

[0105] Here, the constant current dimming control circuit, CCT color temperature control circuit, auxiliary power supply circuit, and RF communication module are used to dim and adjust the color of the LEDs (simulated light source) in the lamp. Specifically, one pulse width modulation signal (PWM1) controls the constant current dimming control circuit to control the brightness of the simulated light source; another pulse width modulation signal (PWM2) controls the CCT color temperature control circuit to control the color temperature of the simulated light source. The two signals are independent and separate, allowing for two-way dimming (one...) Figure 6 The C in the diagram corresponds to the light-emitting diode, and the other route is... Figure 6 When W corresponds to a light-emitting diode, it enables control of the analog light source, ensuring simple and efficient light source adjustment and control.

[0106] See Figure 7 The schematic diagram of the control circuit in the lamp with three-way dimming is shown, and Figure 8 The diagram shows the schematic of the control circuit in a four-channel dimming luminaire, including an EMI and rectifier circuit, a dimming and color temperature control circuit, an auxiliary power supply circuit, and an RF communication module. The dimming and color temperature control circuit is controlled by a single control signal, enabling dimming control of three or more light sources. Brightness and color temperature are adjusted by regulating the duty cycle of the control signal.

[0107] here, Figure 7 The three dimming channels are composed of LEDs corresponding to R, G, and B, respectively. Figure 8 The four dimming channels are composed of light-emitting diodes corresponding to LED1, LED2, LED3 and LED4, respectively.

[0108] The following are method embodiments of the present invention. For details not described in detail, please refer to the corresponding device embodiments described above.

[0109] Figure 9 This is a flowchart illustrating the implementation of a dimming method for a luminaire using a simulated sunlight light source, as provided in an embodiment of the present invention. This dimming method is applied to the simulated sunlight light source luminaire described in the above-described device embodiment, and is detailed below:

[0110] Step S901: Obtain the number of light sources participating in dimming in the lamp.

[0111] In this embodiment, the number of light sources in the circuit needs to be determined before dimming, so as to perform targeted dimming and accurately dim each light source.

[0112] Step S902: Calculate the duty cycle of each light source based on the number of light sources and the color coordinates of the target color point for dimming.

[0113] In this embodiment, the light corresponding to the target color point of dimming is the light emitted by the final composite of all light sources in the lamp. Here, by specifying the number of light sources, a suitable dimming method can be selected. Then, by using the target color point and the color coordinates of each light source, the duty cycle corresponding to the light of each light source in the final composite light can be calculated. Thus, the brightness and color temperature of each light source can be adjusted so that the desired light can be composited.

[0114] Step S903: Mix the light from each light source according to the duty cycle of each light source.

[0115] Optionally, the duty cycle of each light source can be calculated based on the number of light sources and the color coordinates of the target color point for dimming. This can include: when the number of light sources is 2, calculating the duty cycle of each light source based on the linear mixing method, the color coordinates of the target color point for dimming, and the color coordinates of the two light sources; when the number of light sources is 3, calculating the duty cycle of each light source based on the Grassmann mixing method, the color coordinates of the target color point for dimming, and the color coordinates of the three light sources; when the number of light sources is greater than 3, identifying the three target light sources closest to the color coordinates of the target color point, and calculating the duty cycle of the three target light sources based on the Grassmann mixing method, the color coordinates of the target color point for dimming, and the color coordinates of the three target light sources.

[0116] In this embodiment, when mixing two light sources, a linear mixing method can be used, according to the expression: Calculate the duty cycle of each light source; where D i x represents the duty cycle corresponding to the i-th light source. m and y m R represents the color coordinates of the target color point. m This indicates the relationship between the light source brightness and y-value corresponding to the target color point. m The ratio, x i and y i R represents the color coordinates corresponding to the i-th light source. i This represents the relationship between the brightness of the i-th light source and y. i The ratio, x j and y j Let i represent the color coordinates of the j-th light source, and i and j represent the two light sources.

[0117] When mixing light from three light sources, the Grassmann mixing method can be used, according to the expression: Calculate the duty cycle of each light source; where D i x represents the duty cycle corresponding to the i-th light source. m and y m R represents the color coordinates of the target color point. m This indicates the relationship between the light source brightness and y-value corresponding to the target color point. m The ratio, x i and y i R represents the color coordinates corresponding to the i-th light source. i This represents the relationship between the brightness of the i-th light source and y. i The ratio, x j and y j Let x represent the color coordinates of the j-th light source. k and y k Let i represent the color coordinates of the k-th light source, and i, j, and k represent the three light sources.

[0118] When dealing with three or more light sources, the multiple light sources can be converted into three light sources for dimming. Select the three target light sources that are closest to the color coordinates of the target color point among the multiple light sources, calculate the duty cycle for the three target light sources, and thus configure the light from the multiple light sources to the light corresponding to the target color point.

[0119] Optionally, when determining the duty cycle of each light source, the duty cycle of the pulse width modulation of each light source can be determined first, and the temperature and current can be calibrated. Then, the duty cycle of the pulse width modulation of each light source can be determined again to ensure the accuracy of the final dimming and color adjustment, so as to obtain the light corresponding to the target color point.

[0120] In one specific embodiment, the light source in the luminaire is adjusted at two color temperatures: 4000K and 5000K. Figure 10 The image shows the corresponding spectra under different adjustment parameters. The horizontal axis represents the emission wavelength (nm), and the vertical axis represents the relative emission intensity. It can be seen that when the NIRC ratio is greater than 90%, it can supplement the simulated light source with deep red light. When the NIRC ratio is greater than 95%, it can effectively supplement the deep red light in the simulated light source, ensuring the fit between the simulated light source and sunlight.

[0121] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0122] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0123] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A sunlight simulation light source, characterized in that, Includes a support frame, electroluminescent components, and photoluminescent components; An electroluminescent component and a photoluminescent component are disposed on the support, and the photoluminescent component is covered on the outside of the electroluminescent component; wherein, the luminescent material of the photoluminescent component includes a deep red phosphor; The electroluminescent component is used to emit light of a first color, and the photoluminescent component is used to convert the first color light into light of a second color and emit it; the first color light and the second color light constitute a fitted sunlight containing deep red light; The simulated light source also includes multiple reflectors; The reflector is mounted on the bracket; Each reflector is equipped with an electroluminescent component and a photoluminescent component. The reflector is used to reflect the first color light emitted by the electroluminescent component and the second color light converted by the photoluminescent component. The first color light emitted by all the electroluminescent components in each reflector and the second color light converted by all the photoluminescent components constitute the fitted sunlight containing deep red light; The first and second color lights in each reflector form a second composite light containing deep red light at different color temperatures, so that the light in all the reflectors forms a fitted sunlight containing deep red light. Alternatively, the first and second color lights in at least one of the reflectors constitute deep red light, and the first and second color lights in the remaining reflectors constitute a third composite light of different color temperatures, so that the light in all the reflectors constitutes a fitted sunlight containing deep red light. Alternatively, the first and second color light in at least one of the reflectors constitute deep red light, and the first and second color light in the remaining reflectors constitute a second composite light containing deep red light of different color temperatures, so that the light in all the reflectors constitutes a fitted sunlight containing deep red light. Alternatively, the first and second color lights in at least one of the reflectors constitute a fourth composite light, and the first and second color lights in the remaining reflectors constitute a second composite light containing deep red light of different color temperatures, so that the light in all the reflectors constitutes a fitted sunlight containing deep red light. The second composite light corresponds to a continuous spectrum with a wavelength range from 400nm to 780nm, the third composite light corresponds to a continuous spectrum with a wavelength range from 400nm to 670nm, and the fourth composite light is used to supplement the wavelength range in which the relative luminous intensity of the light composed of the second composite light of the other reflectors is lower than a preset threshold. The simulated sunlight containing deep red light includes simulated sunlight of various color temperatures, each of which is obtained by adjusting the light from each reflector.

2. The sunlight simulation light source according to claim 1, characterized in that, The light-emitting chip of the electroluminescent component includes at least one of the following: a near-ultraviolet light chip, a blue light chip, and a near-infrared light chip; The luminescent material of the photoluminescent component also includes at least one of the following: blue phosphor, cyan phosphor, green phosphor, and red phosphor.

3. A luminaire that simulates sunlight, characterized in that, It includes a chassis, a light engine module, a bandpass filter, and a lampshade, wherein the light engine module includes a control circuit and a sunlight simulation light source as described in claim 1 or 2 above. The light engine module is mounted on the chassis. The bandpass filter is provided on the optical engine module; The lampshade covers the bandpass filter and the light engine module, and the lampshade is detachably connected to the chassis.

4. A dimming method for a luminaire using a simulated sunlight light source, characterized in that, The method is applied to the luminaire of the sunlight simulation light source as described in claim 3; the method includes: Obtain the number of light sources participating in dimming in the lamp; Calculate the duty cycle of each light source based on the number of light sources and the color coordinates of the target color point for dimming; The light from each light source is mixed according to the duty cycle of each light source.

5. The dimming method for the luminaire using a simulated sunlight source according to claim 4, characterized in that, The step of calculating the duty cycle of each light source based on the number of light sources and the color coordinates of the target color point for dimming includes: When the number of light sources is 2, the duty cycle of each light source is calculated based on the linear mixing method, the color coordinates of the target color point for dimming, and the color coordinates of the two light sources. When the number of light sources is 3, the duty cycle of each light source is calculated based on the Grassmann mixing method, the color coordinates of the target color point for dimming, and the color coordinates corresponding to the three light sources. When the number of light sources is greater than 3, the target three light sources closest to the color coordinates of the target color point are determined. Based on the Grassmann mixing method, the color coordinates of the target color point to be dimmed, and the color coordinates corresponding to the target three light sources, the duty cycle of the target three light sources is calculated.

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