Spectral compensation methods, devices, luminaires, and media based on narrowband light sources

Abstract

This disclosure provides a spectral compensation method, apparatus, luminaire, and medium based on a narrowband light source. The spectral compensation method based on a narrowband light source can be applied to luminaires. The method includes: acquiring configuration information for a target light, and controlling multiple base light sources in the luminaire to mix light based on the configuration information, so that the luminaire emits initial mixed light; acquiring initial mixed spectral data of the luminaire when emitting the initial mixed light, and acquiring target spectral data of the target light, and determining the spectral difference value between the initial mixed spectral data and the target spectral data; selecting a target compensation light source from multiple pre-set narrowband light sources whose wavelength range is within the spectral difference value, wherein the half-width at half-maximum (WHM) of the narrowband light source is smaller than that of the base light source; and controlling the target compensation light source to mix light with multiple base light sources so that the luminaire emits target mixed light, thereby solving the problem of spectral loss and effectively improving the luminous quality of the luminaire.

Description

Technical Field

[0001] This disclosure relates to the field of lighting control technology, and in particular to a spectral compensation method, device, luminaire, and medium based on a narrowband light source. Background Technology

[0002] In the lighting industry, as people's living standards improve, the requirements for the spectral quality of light sources are also increasing. The spectral power distribution data of luminaires needs to be as close as possible to natural sunlight, that is, to achieve so-called full-spectrum lighting. However, in related technologies, luminaires often use multi-primary-color broadband light sources for light mixing. This method can roughly simulate the shape of the target spectrum, but due to the inherent physical defects of the light source, it is prone to spectral gaps, thus reducing the luminous quality. Summary of the Invention

[0003] The main objective of this disclosure is to provide a spectral compensation method, device, lamp, and medium based on a narrowband light source, which can improve the luminous quality.

[0004] To achieve the above objectives, a first aspect of this disclosure proposes a spectral compensation method based on a narrowband light source, applied to a lighting fixture. The spectral compensation method based on a narrowband light source includes: The configuration information for the target light is obtained, and the multiple basic light sources in the luminaire are controlled to mix the light based on the configuration information so that the luminaire emits an initial mixed light; Acquire the initial mixed spectral data of the lamp when it emits the initial mixed light, and acquire the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data; From a plurality of pre-set narrowband light sources, the one located within the wavelength range of the spectral difference value is selected as the target compensation light source, wherein the half-width at half maximum (WHM) of the narrowband light source is smaller than the half-width at half maximum (WHM) of the base light source; The target compensation light source is controlled to mix with multiple base light sources so that the luminaire emits target mixed light.

[0005] In some embodiments, determining the spectral difference value between the initial mixed spectral data and the target spectral data includes: The initial mixed spectral data and the target spectral data are respectively normalized; The difference between the normalized target spectral data and the normalized initial mixed spectral data is calculated, and the difference is used as the spectral difference value.

[0006] In some embodiments, the plurality of base light sources include a broadband light source module, which is composed of a variety of white LEDs with different color temperatures and / or a variety of monochromatic broadband LEDs. The white LEDs include white LEDs formed by blue LED chips exciting yellow phosphors, and the monochromatic broadband LEDs include one or more of red LEDs, green LEDs, and blue LEDs.

[0007] In some embodiments, the peak wavelengths of the plurality of narrowband light sources are different, and the full width at half maximum (FWHM) of the plurality of narrowband light sources is less than or equal to 20 nm, while the FWHM of the base light source is greater than 20 nm.

[0008] In some embodiments, the narrowband light source is disposed at the front end of the optical mixing path of the luminaire, and the light-emitting surface of the narrowband light source faces the optical mixing and homogenizing component of the luminaire, so that the compensation light emitted by the narrowband light source is mixed with the basic light emitted by the plurality of basic light sources before entering the illumination space.

[0009] In some embodiments, controlling the target compensation light source to mix with the plurality of base light sources includes: Based on the magnitude of the spectral difference value, determine the compensation coefficient corresponding to the target compensation light source; The driving electrical parameters of the target compensation light source are adjusted according to the compensation coefficient to adjust the luminous intensity of the target compensation light source and then mixed with multiple base light sources.

[0010] To achieve the above objectives, a second aspect of this disclosure provides a spectral compensation device based on a narrowband light source, applied to a lighting fixture. The spectral compensation device based on the narrowband light source includes: A coarse light mixing module is used to acquire configuration information for the target light and control multiple basic light sources in the luminaire to mix the light based on the configuration information, so that the luminaire emits initial mixed light; The difference determination module is used to acquire the initial mixed spectral data of the lamp when it emits the initial mixed light, acquire the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data; The narrowband light source screening module is used to select, from a plurality of pre-set narrowband light sources, those located within the wavelength range of the spectral difference value as target compensation light sources, wherein the half-width at half maximum (WHM) of the narrowband light source is smaller than that of the base light source. The compensation module is used to control the target compensation light source to mix with multiple base light sources so that the lamp emits target mixed light.

[0011] To achieve the above objectives, a third aspect of the present disclosure provides a luminaire comprising: a plurality of base light sources, a plurality of narrowband light sources, a spectral sensing module, and a control module, wherein the half-width at half-maximum (WHM) of the narrowband light sources is smaller than the WHM of the base light sources, and the spectral sensing module is used to acquire initial mixed spectral data of the luminaire when emitting initial mixed light. The control module is configured to: acquire configuration information for the target light, and control multiple base light sources in the luminaire to mix light based on the configuration information, so that the luminaire emits initial mixed light; receive the initial mixed spectral data collected by the spectral sensing module, acquire the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data; select from multiple narrowband light sources that are located within the wavelength range of the spectral difference value as the target compensation light source; and control the target compensation light source to mix light with multiple base light sources so that the luminaire emits target mixed light.

[0012] In some embodiments, the plurality of basic light sources of the luminaire include a broadband light source module, which is composed of a variety of white LEDs with different color temperatures and / or a variety of monochromatic broadband LEDs. The white LEDs include white LEDs formed by blue LED chips exciting yellow phosphors, and the monochromatic broadband LEDs include one or more of red LEDs, green LEDs, and blue LEDs.

[0013] In some embodiments, the peak wavelengths of the plurality of narrowband light sources of the luminaire are different, and the full width at half maximum (FWHM) of the plurality of narrowband light sources is less than or equal to 20 nm, while the FWHM of the base light source is greater than 20 nm.

[0014] In some embodiments, the narrowband light source is disposed at the front end of the optical mixing path of the luminaire, and the light-emitting surface of the narrowband light source faces the optical mixing and homogenizing component of the luminaire, so that the compensation light emitted by the narrowband light source is mixed with the basic light emitted by the plurality of basic light sources before entering the illumination space.

[0015] To achieve the above objectives, a fourth aspect of the present disclosure provides a lighting fixture, the lighting fixture including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the spectral compensation method based on a narrowband light source as described in the first aspect embodiment.

[0016] To achieve the above objectives, a fifth aspect of the present disclosure provides a storage medium, which is a computer-readable storage medium storing a computer program that, when executed by a processor, implements the spectral compensation method based on a narrowband light source as described in the first aspect embodiment.

[0017] The beneficial effects of the embodiments disclosed herein include: This embodiment first controls multiple base light sources to mix based on target light configuration information to obtain initial mixed light. Then, it acquires the initial mixed spectral data and target spectral data and determines the spectral difference between the two to accurately locate the wavelength range of the missing spectrum. Subsequently, it selects a narrowband light source with a half-width of less than that of the base light source and whose wavelength is within the difference range as the target compensation light source. By utilizing the advantage of the narrowband light source in accurately supplementing light, it makes up for the spectral defects caused by the mixing of base light sources. Finally, it controls the target compensation light source and the base light source to mix light together, so that the spectrum of the target mixed light emitted by the lamp is closer to the target light, thereby solving the problem of spectral defects and effectively improving the luminous quality of the lamp. Attached Figure Description

[0018] Figure 1 This is a schematic flowchart of the spectral compensation method based on a narrowband light source provided in the embodiments of this disclosure; Figure 2 This is a schematic diagram illustrating the difference in spectral power distribution data between the initial mixed spectral data and the target spectral data provided in the embodiments of this disclosure; Figure 3 This is a schematic diagram of the spectral power distribution data of a certain narrowband light source provided in an embodiment of this disclosure; Figure 4 yes Figure 1 A flowchart further includes step S102; Figure 5 yes Figure 1 A flowchart further includes step S104; Figure 6 This is a schematic diagram of the functional modules of the spectral compensation device based on a narrowband light source provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of the functional modules of the lighting fixture provided in the embodiments of this disclosure; Figure 8 This is a schematic diagram of the hardware structure of the lamp provided in the embodiments of this disclosure. Detailed Implementation

[0019] The accompanying drawings in the embodiments clearly and completely describe the technical solutions in the embodiments of this disclosure. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0020] It is understood that in the specific embodiments of this disclosure, which involve retrieving configuration information and related data for the target light, when the above embodiments of this disclosure are applied to specific products or technologies, permission or consent from the target can be obtained first, and the collection, use and processing of related data must comply with relevant laws, regulations and standards.

[0021] Furthermore, when this embodiment of the present disclosure needs to retrieve configuration information and related data for the target light, separate permission or separate consent for the configuration information and related data for the target light can be obtained through pop-up windows or by jumping to a confirmation page. After clearly obtaining separate permission or separate consent for the configuration information and related data for the target light, the necessary configuration information and related data for the target light for enabling the embodiments of the present disclosure to operate normally can then be obtained.

[0022] In this disclosure, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0023] Please see Figure 1 , Figure 1 This is a flowchart illustrating the spectral compensation method based on a narrowband light source provided in this embodiment. This spectral compensation method based on a narrowband light source can be applied to lighting fixtures. The spectral compensation method based on a narrowband light source includes steps S101 to S104: Step S101: Obtain configuration information for the target light, and control multiple basic light sources in the luminaire to mix the light based on the configuration information so that the luminaire emits initial mixed light; Step S102: Obtain the initial mixed spectral data when the lamp emits the initial mixed light, and obtain the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data; Step S103: Select the target compensation light source from a plurality of pre-set narrowband light sources that are located within the wavelength range of the spectral difference value. The half-width at half-maximum (WHM) of the narrowband light source is smaller than that of the base light source. Step S104: Control the target compensation light source to mix with multiple base light sources so that the luminaire emits target mixed light.

[0024] Regarding step S101 above, the configuration information refers to the target lighting parameters set by the user or the system. The configuration information can be a target color temperature value, such as a 6500K D65 standard light source. It can also be other parameters that express the user's desired target light, such as the target spectral type, like simulating morning light, midday sunlight, or sunset. The base light source is the light-emitting unit in the luminaire used to generate the main lighting.

[0025] Furthermore, the multiple base light sources in this embodiment include broadband light source modules, which are composed of various white LEDs with different color temperatures and / or various monochromatic broadband LEDs. That is, each base light source can be a white LED with different color temperatures and / or various monochromatic broadband LEDs. The white LEDs include white LEDs formed by blue LED chips exciting yellow phosphors, and the monochromatic broadband LEDs include one or more of red, green, and blue LEDs, with a half-width at half-maximum (WHM) typically greater than 20 nm. Thus, by combining white LEDs with different color temperatures, such as warm white, neutral white, and cool white, this embodiment can achieve a wide range of continuous color temperature adjustment, quickly approximating the main shape of the target spectrum. Introducing monochromatic broadband LEDs such as red, green, and blue LEDs can specifically enhance the energy of the base spectrum in certain wavelength bands, compensating for potential inherent defects in white LED combinations, such as enhancing the red band to improve the color rendering index (R9). This diversified basic light source architecture enables the luminaire to achieve a high spectral fit in the first coarse adjustment stage, reducing the pressure on subsequent narrowband compensation. At the same time, it avoids the drawback of over-complexing the basic light source design to compensate for the lack of a single band, and achieves an optimized balance between adjustment range and system cost.

[0026] The full width at half maximum (FWHM), also known as the half-peak full width, is a chromatographic analysis term that refers to the peak width at half the height of a chromatographic peak. It is the distance between two points where a straight line drawn through the midpoint of the peak height intersects the two sides of the peak.

[0027] In addition to these, the base light source can also employ other solid-state light-emitting devices or traditional light source forms, such as OLED organic light-emitting diode panels, which have surface light source characteristics and good spectral continuity, making them suitable as a base light source for large-area illumination. Laser-excited phosphor devices can also be used, where blue or ultraviolet lasers excite phosphors coated on a phosphor wheel to produce broadband white light; this type of light source has the advantages of high brightness and long lifespan. In some special applications, gas discharge light sources such as metal halide lamps or xenon lamps can also be used as the base light source, as their spectra are relatively continuous, and preliminary spectral shaping can be achieved through filtering or dimming techniques. Regardless of the form used, the core function of the base light source is to provide the main framework of the spectrum and achieve a wide range of color temperature adjustment for subsequent narrowband refinement.

[0028] The lamp in this embodiment is also equipped with a control module, which can adjust the driving current or PWM duty cycle of each basic light source according to the configuration information, through a pre-stored mixing model or real-time feedback algorithm, so that the color temperature and spectrum of the output light after mixing are initially close to the target solar spectrum. The resulting spectrum is called the initial mixed light.

[0029] It should be noted that the embodiments disclosed herein rapidly construct a main framework close to the target spectrum through preliminary light mixing of the basic light source, laying an energy foundation for subsequent accurate compensation, and avoiding the problems of high cost and low efficiency caused by directly using narrowband light sources to construct the full spectrum.

[0030] Regarding step S102 above, the initial mixed spectral data is obtained in real time by the spectral sensing module installed in the lamp, or it can be detected by an external sensor and transmitted to the lamp. This embodiment only uses the lamp equipped with a spectral sensing module as an example, but it does not represent a limitation on this embodiment. The initial light mixed spectral data is denoted as SPD_baseλ.

[0031] The target spectral data is a standard spectral curve stored in a database, or a standard spectral curve sent to the lamp by an external device, such as a terminal APP, like the spectra of standard illuminators such as D50, D65, and D75, which can be labeled as SPD_targetλ. The control module compares the base spectrum and the target spectrum point by point or segment by segment to obtain the spectral difference curve ΔSPDλ = SPD_targetλ - SPD_baseλ. The preset positive threshold δ is a pre-set judgment threshold that can determine whether the difference exceeds a preset range, thereby determining whether there is a band missing problem. In this embodiment, by analyzing ΔSPDλ, the continuous wavelength range in which ΔSPDλ is greater than the preset positive threshold δ is identified. These ranges are the key missing bands. For example, significant energy loss may be identified in the cyan band of 505-515nm and the deep red band of 655-665nm.

[0032] It should be noted that the spectral data in this embodiment refers to spectral power distribution (SPD) data, which is the functional relationship between the spectral density of a light source and its wavelength. It is usually represented by a spectral power distribution curve, with wavelength on the horizontal axis and radiant power (intensity) on the vertical axis. It is crucial for describing the characteristics of a light source and measuring color.

[0033] Regarding step S103 above, a narrowband light source is a light-emitting device with a relatively small half-width at half-maximum (HWHM) compared to the base light source, such as a laser diode (LD), a narrow HWHM LED, or a narrowband light source excited by specific phosphors. Furthermore, the peak wavelength of the narrowband light source can be pre-selected to cover common key missing wavelength bands, such as 450nm, 510nm, 590nm, and 660nm. Based on the wavelength range of the identified spectral difference value, a light source within that range can be automatically matched and selected from multiple candidate narrowband light sources as the target compensation light source.

[0034] Furthermore, the peak wavelengths of the multiple narrowband light sources differ, and the full width at half maximum (FWHM) of each narrowband light source is less than or equal to 20 nm, while the FWHM of the base light source is greater than 20 nm. The wider FWHM of the base light source indicates good spectral continuity and a broad energy coverage, making it suitable for constructing a smooth spectral framework. However, its drawback is the inability to perform independent and precise energy control within specific narrow bands. In this embodiment, the narrowband light source has an extremely narrow FWHM of less than or equal to 20 nm, ensuring that its luminous energy is highly concentrated near the peak wavelength. This allows it to function as a spectral micro-sculpting tool, surgically injecting precise energy into specific missing bands in the base spectrum, such as cyan and deep red, with almost no impact on adjacent well-fitted bands. Therefore, this combination of wide and narrow bands fundamentally solves the inherent problem of traditional broadband mixing techniques failing to eliminate local spectral dips.

[0035] In addition to quantum dot light-emitting devices, narrowband light sources can also employ quantum dot light-emitting devices. Quantum dot materials have tunable size, allowing for the control of quantum dot particle size to achieve narrowband emission at specific wavelengths, with a full width at half maximum (FWHM) of 15 nm or even narrower. Superluminescent diodes (SLDs) can also be used, combining the high brightness of lasers with the broad spectral characteristics of LEDs, providing more ideal compensation effects in certain wavelength bands. Furthermore, fluorescent fiber optic light sources can be employed. By coupling fiber optics doped with specific rare-earth ions to a pump laser, the characteristic transitions of these ions generate extremely narrow emission spectral lines, making them suitable as high-precision compensation light sources. Each of these different forms of narrowband light sources has its own advantages and disadvantages, and the choice can be made based on specific cost, efficiency, and wavelength requirements.

[0036] Furthermore, when the narrowband light source is mounted on the luminaire, it can be positioned at the front end of the luminaire's optical mixing path, with its emitting surface facing the luminaire's optical mixing and homogenizing components. This allows the compensation light emitted by the narrowband light source to mix with the fundamental light emitted by multiple base light sources before entering the illumination space. By placing the narrowband light source at the front of the mixing path, its highly directional compensation light encounters and begins initial mixing with the fundamental light emitted by the base light sources before entering the main mixing area, such as a mixing rod, integrating sphere, or diffuser. Subsequently, both light sources pass through the optical mixing and homogenizing components, achieving sufficient interweaving and spatial homogenization through multiple reflections, refractions, or scattering. The final output is a target mixed light with a uniform energy distribution across all wavelengths within the illumination area, avoiding spatial dispersion or visual defects such as specific color halos in the light spot caused by insufficient mixing of the compensation light and the base light, thus ensuring lighting quality.

[0037] It should be noted that in this embodiment, the narrowband light source can be either externally mounted on the luminaire or installed inside it. This flexible design is primarily to adapt to space constraints, heat dissipation requirements, and modular upgrade requirements in different scenarios. The external mounting method can employ an independent compensation light source module, connected to the main luminaire via fiber optic or mechanical interfaces, facilitating future modifications and upgrades. Users can replace narrowband light source modules with different wavelengths as needed to adapt to different target spectral requirements. Simultaneously, the external layout also facilitates independent heat dissipation design for high-power narrowband light sources, preventing heat concentration from affecting the operational stability of the base light source. The internal mounting method integrates the narrowband light source inside the luminaire cavity, allowing it to share an optical mixing path with the base light source. The advantages of this design include a compact structure, short optical path, and good mixing uniformity, enabling seamless fusion of compensation light and base light. It also reduces the complexity of external wiring and installation, making it more suitable for new integrated luminaire products. Whether external or internal, the core objective is to achieve effective mixing of narrowband compensation light and base light. Therefore, the most suitable arrangement can be flexibly selected based on the luminaire's power level, application scenario, heat dissipation conditions, and cost requirements.

[0038] Furthermore, the number of narrowband light sources needs to be carefully balanced between spectral coverage, system cost, control complexity, and mixing efficiency; more is not necessarily better, nor is less necessarily better. From the perspective of spectral compensation principles, the core function of narrowband light sources is to precisely repair key missing wavelengths that the basic light source cannot cover. Therefore, theoretically, setting one corresponding narrowband light source for each wavelength range where spectral gaps may exist is sufficient to meet basic requirements. For example, a 510nm narrowband light source could be used to address the 480-520nm cyan gap, and a 660nm narrowband light source could be used to address the 640-680nm deep red gap. However, in practical applications, the location and width of missing wavelengths vary for target spectra such as D50, D65, D75, and solar spectra at different color temperatures. To achieve better spectral fitting accuracy, the number of narrowband light sources needs to be increased to form a denser compensation wavelength coverage grid. For example, narrowband light sources could be set at multiple wavelengths such as 450nm, 510nm, 590nm, and 660nm to achieve flexible adaptation to any target spectrum.

[0039] For example, please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram illustrating the difference in spectral power distribution between the initial mixed spectral data and the target spectral data provided in the embodiments of this disclosure. Figure 3 This is a schematic diagram of the spectral power distribution data of a narrowband light source provided in an embodiment of this disclosure. The horizontal axis of both graphs is wavelength (nm), and the vertical axis is light intensity (nm). Figure 2 The medium-colored filled area represents the actual energy curve of the initial mixed light, while the light blue filled area in the background represents the energy range of the target light (such as sunlight). Figure 2 As can be seen, the initial mixed spectral data differs from the target spectral data in the 380-460nm band, the 520nm-540nm band, and after 620nm. This difference is the spectral difference value. Figure 3 Yes, the spectral morphology exhibits a typical spike shape with an extremely narrow half-width (FWHM), meaning almost all the energy is concentrated within this specific narrow wavelength band. This narrowband light source should ideally cover only 460nm-520nm or even smaller. The example in the figure is merely illustrative; in practical applications, a suitable narrowband light source can be selected to precisely fill the energy gap in a specific wavelength band of a full-spectrum basic light source.

[0040] Regarding step S104 above, this embodiment of the present disclosure can control the target compensation light source and the base light source to perform secondary light mixing, so that the spectrum of the final synthesized target mixed light is as close as possible to the target spectrum. Further, the compensation light emitted by the target compensation light source and the base light emitted by the base light source are spatially mixed, for example, through optical mixing and homogenizing components such as mixing rods, diffusers, or integrating spheres, to ensure thorough mixing before entering the illumination space. The spectral difference between the final output target mixed light and the target light is controlled within a preset range, thereby achieving high-precision spectral fitting.

[0041] In summary, the embodiments of this disclosure, through the execution of the spectral compensation method based on narrowband light sources in steps S101 to S104, first control multiple basic light sources to mix light based on target light configuration information to obtain initial mixed light, then acquire the initial mixed spectral data and target spectral data and determine the spectral difference value between the two, accurately locating the wavelength range of spectral missingness, then selecting a narrowband light source with a half-width of less than that of the basic light source and a wavelength within the difference range as the target compensation light source, utilizing the advantage of precise light compensation of the narrowband light source to compensate for the spectral missingness caused by the mixing of basic light sources, and finally controlling the target compensation light source and the basic light source to mix light together, so that the spectrum of the target mixed light emitted by the lamp is closer to the target light, thereby solving the problem of spectral missingness and effectively improving the luminous quality of the lamp.

[0042] Please see Figure 4 , Figure 4 yes Figure 1 The flowchart further includes step S102. In some embodiments, the process of determining the spectral difference value between the initial mixed spectral data and the target spectral data may also include steps S201 to S202: Step S201: Normalize the initial mixed spectral data and the target spectral data respectively; Step S202: Calculate the difference between the normalized target spectral data and the normalized initial mixed spectral data, and use the difference as the spectral difference value.

[0043] In the above steps, normalization maps the intensity values ​​of the spectral data to the same scale range to eliminate comparison bias caused by differences in the total luminous flux of the light source. The normalization method in this embodiment may include peak normalization (dividing the intensity value at each wavelength by the peak spectral intensity) and area normalization (dividing the intensity value at each wavelength by the total area under the spectral curve). After normalization, the intensity values ​​of the target spectrum and the initial mixed spectrum at the same wavelength are comparable. The spectral difference value is the difference between the normalized target spectrum and the initial mixed spectrum at each wavelength. This embodiment can identify the energy-deficient band by observing the spectral difference value. For example, if the normalized target spectral intensity is 0.8 and the normalized initial mixed spectral intensity is 0.5 at a wavelength of 510 nm, the spectral difference value at that point is 0.3. If it exceeds a preset threshold of 0.1, it indicates a significant energy deficiency.

[0044] It should be noted that the embodiments of this disclosure eliminate the influence of absolute intensity through normalization processing, making the identification of spectral differences more accurate and objective; the spectral difference value calculated based on point-by-point difference can accurately lock the degree of energy loss at each wavelength point, providing a quantitative basis for the subsequent precise matching of narrowband light sources.

[0045] In addition to the above, regarding the methods for determining spectral difference values, embodiments of this disclosure can also employ an area integral-based method, which calculates the energy integrals of the initial mixed spectrum and the target spectrum within specific key bands, and determines the total energy to be compensated by comparing the differences in the integral values; alternatively, a correlation coefficient-based method can be used, which assesses the overall similarity by calculating the Pearson correlation coefficient or spectral fit coefficient (GFC) of the two spectral curves, and further locates the specific missing bands when the GFC is below a preset threshold; alternatively, a deep learning-based method can be used, which extracts features from the initial mixed spectrum using a pre-trained neural network model and directly outputs the difference map with the target spectrum or the compensation coefficients for each band. These differentiated calculation methods can evaluate the degree of spectral matching from different dimensions and can be flexibly selected or combined according to accuracy requirements and computational resources.

[0046] Please see Figure 5 , Figure 5 yes Figure 1 The flowchart further includes step S104. In some embodiments, the process of controlling the mixing of the target compensation light source with multiple base light sources may further include steps S301 to S302: Step S301: Determine the compensation coefficient corresponding to the target compensation light source based on the magnitude of the spectral difference value; Step S302: Adjust the driving electrical parameters of the target compensation light source according to the compensation coefficient, so as to adjust the luminous intensity of the target compensation light source and then mix it with multiple basic light sources.

[0047] In the above steps, the compensation coefficient reflects the amount of energy that the target compensation light source needs to contribute. It is proportional to the spectral difference value; the larger the spectral difference value, the more severe the energy deficiency in that band, and the greater the light intensity that needs to be compensated. Driving electrical parameters include the magnitude of the driving current or the duty cycle of the PWM pulse width modulation signal. Based on the compensation coefficient, the control module calculates the corresponding driving current value or PWM duty cycle through a lookup table or preset algorithm, and applies it to the target compensation light source to achieve precise adjustment of the luminous intensity. For example, if the spectral difference value in the 510nm band is 0.3, and the corresponding compensation coefficient is 0.7, the control module adjusts the PWM duty cycle of the narrowband light source with a peak wavelength of 510nm from 0 to 70%, causing it to emit compensation light of the corresponding intensity. If a narrowband light source of 660nm is selected simultaneously, and its corresponding compensation coefficient is 0.5, its PWM duty cycle is adjusted to 50%. The adjusted compensation light is mixed with the base light continuously emitted by the base light source in the mixing component, and the final difference between the output spectrum and the target spectrum is controlled within a preset range.

[0048] It should be noted that the embodiments of this disclosure determine the compensation coefficient by quantifying the spectral difference value, and adjust the luminous intensity of the narrowband light source accordingly, thereby realizing the on-demand allocation of compensation energy, avoiding the phenomenon of insufficient or excessive compensation, and ensuring a high degree of consistency between the final synthesized spectrum and the target spectrum.

[0049] Furthermore, after selecting the target compensation light source, since the theoretically calculated compensation coefficient may deviate from the expected actual compensation effect due to factors such as light source aging, temperature drift, and optical path attenuation, this embodiment can also achieve precise compensation through iterative optimization. Specifically, the luminaire first preliminarily determines a compensation coefficient based on the spectral difference value and drives the target compensation light source to emit light. Then, the spectral sensing module collects the current target mixed spectral data again and recalculates the remaining spectral difference value between it and the target spectrum. If the remaining difference value is still greater than the preset threshold, the compensation coefficient is adjusted according to the new difference value, for example, by using a proportional-integral-derivative control algorithm or gradient descent method to gradually approach the optimal compensation intensity. This process is repeated until the spectral difference value converges to within the preset allowable range. This dynamic iterative optimization mechanism can effectively overcome the influence of environmental changes and device nonlinearity, ensuring that the final output mixed light is highly consistent with the target spectrum at every wavelength point, thereby achieving truly adaptive, high-precision full-spectrum lighting.

[0050] Please see Figure 6This disclosure also provides a spectral compensation device based on a narrowband light source, which, when applied to a lamp, can realize the aforementioned spectral compensation method based on a narrowband light source. The spectral compensation device based on a narrowband light source includes: The coarse light mixing module 601 is used to acquire configuration information for the target light and control multiple basic light sources in the luminaire to mix the light based on the configuration information so that the luminaire emits initial mixed light. The difference determination module 602 is used to acquire the initial mixed spectral data when the lamp emits the initial mixed light, acquire the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data. Narrowband light source filtering module 603 is used to select from multiple preset narrowband light sources that are located within the wavelength range of the spectral difference value as the target compensation light source. The half-width at half-maximum (WHM) of the narrowband light source is smaller than that of the base light source. The compensation module 604 is used to control the target compensation light source to mix with multiple base light sources so that the luminaire emits target mixed light.

[0051] In summary, the spectral compensation device based on narrowband light sources executes the spectral compensation method based on narrowband light sources in the above embodiments. First, it controls multiple basic light sources to mix based on the target light configuration information to obtain an initial mixed light. Then, it acquires the initial mixed spectral data and the target spectral data and determines the spectral difference between them, accurately locating the wavelength range of spectral defects. Subsequently, it selects a narrowband light source with a half-width at half-maximum (FWHM) smaller than the basic light sources and whose wavelength falls within this difference range as the target compensation light source. Utilizing the precise light-filling advantage of narrowband light sources, it compensates for the spectral defects caused by the mixing of basic light sources. Finally, it controls the target compensation light source and the basic light sources to mix collaboratively, making the spectrum of the target mixed light emitted by the lamp closer to the target light, thereby solving the problem of spectral defects and effectively improving the luminous quality of the lamp.

[0052] The specific implementation of the spectral compensation device based on a narrowband light source is basically the same as the specific embodiment of the spectral compensation method based on a narrowband light source described above, and will not be repeated here. Subject to meeting the requirements of the embodiments of this disclosure, the spectral compensation device based on a narrowband light source may also be equipped with other functional modules to implement the spectral compensation method based on a narrowband light source in the above embodiments.

[0053] Please see Figure 7 This disclosure also provides a luminaire, including: multiple base light sources, multiple narrowband light sources, a spectral sensing module, and a control module, wherein the half-width at half-maximum (WHM) of the narrowband light sources is smaller than that of the base light sources, and the spectral sensing module is used to acquire initial mixed spectral data when the luminaire emits initial mixed light.

[0054] The control module is used to execute the spectral compensation method based on narrowband light sources in the above embodiments, including: acquiring configuration information for the target light, and controlling multiple basic light sources in the luminaire to mix light based on the configuration information so that the luminaire emits initial mixed light; receiving initial mixed spectral data collected from the spectral sensing module, and acquiring target spectral data of the target light, and determining the spectral difference value between the initial mixed spectral data and the target spectral data; selecting from multiple narrowband light sources that are located within the wavelength range of the spectral difference value as the target compensation light source; and controlling the target compensation light source to mix light with multiple basic light sources so that the luminaire emits target mixed light.

[0055] The system comprises several basic light sources used for initial light mixing based on the target light configuration information, emitting initial mixed light covering the main spectral framework; several narrowband light sources, serving as precise repair tools, have a half-width at half-maximum (HWHM) smaller than that of the basic light sources, used for energy compensation of specific missing wavelengths in subsequent stages; a spectral sensing module collects the initial mixed spectral data emitted by the luminaires in real time, providing objective feedback information; and a control module, as the core processing unit, is responsible for receiving configuration information and spectral data, calculating spectral difference values, selecting the target compensation light source from the multiple narrowband light sources, and precisely controlling its collaborative work with the basic light sources to ultimately output target mixed light that highly matches the target light.

[0056] The luminaire can be any lighting device, including table lamps, downlights, spotlights, and ceiling lights. The specific implementation of this luminaire is basically the same as the specific embodiments of the luminaire mentioned in the above-described spectral compensation method based on narrowband light sources, and will not be repeated here. Subject to meeting the requirements of the embodiments of this disclosure, the luminaire may also be equipped with other modules, such as optical mixing and homogenizing components, to realize the spectral compensation method based on narrowband light sources in the above embodiments.

[0057] This disclosure also provides a lighting fixture, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the aforementioned spectral compensation method based on a narrowband light source. This lighting fixture can be any smart terminal, including tablet computers, in-vehicle computers, etc.

[0058] Please see Figure 8 , Figure 8 The hardware structure of a lamp according to another embodiment is illustrated. The lamp includes: The processor 801 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this disclosure. The memory 802 can be implemented as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 802 can store operating devices and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 802 and is called and executed by the processor 801 to execute the spectral compensation method based on a narrowband light source according to the embodiments of this disclosure. The 803 input / output interface is used to implement information input and output. The communication interface 804 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.). Bus 805 transmits information between various components of the device (e.g., processor 801, memory 802, input / output interface 803, and communication interface 804); The processor 801, memory 802, input / output interface 803, and communication interface 804 are connected to each other within the device via bus 805.

[0059] This disclosure also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described spectral compensation method based on a narrowband light source.

[0060] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0061] The embodiments described in this disclosure are for the purpose of more clearly illustrating the technical solutions of this disclosure and do not constitute a limitation on the technical solutions provided by this disclosure. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by this disclosure are also applicable to similar technical problems.

[0062] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this disclosure, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0063] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0064] Those skilled in the art will understand that all or some of the steps, apparatuses, or functional modules / units in the methods disclosed above can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0065] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in this disclosure and the foregoing drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0066] It should be understood that in this disclosure, "at least one item" means one or more, and "more than one" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0067] In the several embodiments provided in this disclosure, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0068] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0069] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0070] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0071] The preferred embodiments of the present disclosure have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present disclosure. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and spirit of the present disclosure shall be within the scope of the claims of the present disclosure.

Claims

1. A spectral compensation method based on a narrowband light source, applied to lighting fixtures, characterized in that, The spectral compensation method based on narrowband light sources includes: The configuration information for the target light is obtained, and the multiple basic light sources in the luminaire are controlled to mix the light based on the configuration information so that the luminaire emits an initial mixed light; Acquire the initial mixed spectral data of the lamp when it emits the initial mixed light, and acquire the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data; From a plurality of pre-set narrowband light sources, the one located within the wavelength range of the spectral difference value is selected as the target compensation light source, wherein the half-width at half maximum (WHM) of the narrowband light source is smaller than the half-width at half maximum (WHM) of the base light source; The target compensation light source is controlled to mix with multiple base light sources so that the luminaire emits target mixed light.

2. The spectral compensation method based on a narrowband light source according to claim 1, characterized in that, Determining the spectral difference value between the initial mixed spectral data and the target spectral data includes: The initial mixed spectral data and the target spectral data are respectively normalized; The difference between the normalized target spectral data and the normalized initial mixed spectral data is calculated, and the difference is used as the spectral difference value.

3. The spectral compensation method based on a narrowband light source according to claim 1, characterized in that, The plurality of said basic light sources include a broadband light source module, which is composed of a variety of white LEDs with different color temperatures and / or a variety of monochromatic broadband LEDs. The white LEDs include white LEDs formed by blue LED chips exciting yellow phosphors, and the monochromatic broadband LEDs include one or more of red LEDs, green LEDs and blue LEDs.

4. The spectral compensation method based on a narrowband light source according to claim 1 or 3, characterized in that, The peak wavelengths of the multiple narrowband light sources are different, and the full width at half maximum (FWHM) of the multiple narrowband light sources is less than or equal to 20 nm, while the FWHM of the base light source is greater than 20 nm.

5. The spectral compensation method based on a narrowband light source according to claim 1, characterized in that, The narrowband light source is positioned at the front end of the optical mixing path of the luminaire, and the light-emitting surface of the narrowband light source faces the optical mixing and homogenizing components of the luminaire, so that the compensation light emitted by the narrowband light source is mixed with the basic light emitted by the plurality of basic light sources before entering the lighting space.

6. The spectral compensation method based on a narrowband light source according to claim 1, characterized in that, The control of mixing the target compensation light source with the multiple base light sources includes: Based on the magnitude of the spectral difference value, determine the compensation coefficient corresponding to the target compensation light source; The driving electrical parameters of the target compensation light source are adjusted according to the compensation coefficient to adjust the luminous intensity of the target compensation light source and then mixed with multiple base light sources.

7. A spectral compensation device based on a narrowband light source, applied to a lighting fixture, characterized in that, The spectral compensation device based on a narrowband light source includes: A coarse light mixing module is used to acquire configuration information for the target light and control multiple basic light sources in the luminaire to mix the light based on the configuration information, so that the luminaire emits initial mixed light; The difference determination module is used to acquire the initial mixed spectral data of the lamp when it emits the initial mixed light, acquire the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data; The narrowband light source screening module is used to select, from a plurality of pre-set narrowband light sources, those located within the wavelength range of the spectral difference value as target compensation light sources, wherein the half-width at half maximum (WHM) of the narrowband light source is smaller than that of the base light source. The compensation module is used to control the target compensation light source to mix with multiple base light sources so that the lamp emits target mixed light.

8. A lamp, characterized in that, include: The system includes multiple base light sources, multiple narrowband light sources, a spectral sensing module, and a control module. The half-width at half-maximum (WHM) of the narrowband light sources is smaller than that of the base light sources. The spectral sensing module is used to acquire the initial mixed spectral data of the luminaire when it emits initial mixed light. The control module is configured to: acquire configuration information for the target light, and control multiple base light sources in the luminaire to mix light based on the configuration information, so that the luminaire emits initial mixed light; receive the initial mixed spectral data collected by the spectral sensing module, acquire the target spectral data of the target light, and determine the spectral difference value between the initial mixed spectral data and the target spectral data; select from multiple narrowband light sources that are located within the wavelength range of the spectral difference value as the target compensation light source; and control the target compensation light source to mix light with multiple base light sources so that the luminaire emits target mixed light.

9. A lamp, characterized in that, The luminaire includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the spectral compensation method based on a narrowband light source as described in any one of claims 1 to 6.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the spectral compensation method based on a narrowband light source as described in any one of claims 1 to 6.

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