171 results about "Spectral power distribution" patented technology

The invention discloses a light source color preference degree evaluation method and device, equipment and a storage medium, and relates to the technical field of light source quality testing. The method comprises the following steps: acquiring a color temperature parameter of a test light source and spectral power distribution in a preset wavelength range, acquiring an associated reference light source based on the color temperature parameter, and calculating reference spectral power distribution; a color quality index is then calculated based on the plurality of test color samples according to the color temperature parameter, the spectral power distribution, and the reference spectral power distribution. Calculating a color gamut space area formed by the test color sample under the test light source according to the spectral power distribution, calculating a color resolution index according to the color gamut space area, and finally calculating a color preference index of the test light source according to the color quality index and the color resolution index. Therefore, the color preference index is calculated according to the color temperature parameter and the reference light source, the calculation process is associated with visual feelings such as visual discrimination, and a basis is provided for accurate evaluation or comparison of the color development quality of different color temperature test light sources through quantitative calculation of the color preference.

The invention discloses a color temperature correction method and device of a liquid crystal display system and a storage medium. The method comprises the following steps: determining tristimulus values of original white pixel points of the system in a CIE 1931XYZ color space according to normalized spectral power distribution of a white light backlight source of the liquid crystal display system and a transmittance spectrum of a three-primary color filter of a color film; determining a target RGB color space and a target color temperature, and constructing a color space conversion matrix from the target color space to an XYZ color space; converting the tristimulus values of the original white pixel points of the system in the XYZ color space into the three-primary color channel values of the target white pixel points under the target color temperature in the target color space by using the inverse matrix of the color space conversion matrix; and driving the system to display white according to the three-primary color channel value of the target white pixel point. According to the scheme, the color temperature correction of the liquid crystal display system is realized through a method of combining measurement and theoretical calculation, and the color temperature correction efficiency is improved.

The invention provides a light generating system (1000) configured to generate system light (1001), wherein the light generating system (1000) comprises a first light generating device (110), wherein: (A) the first light generating device (110) comprises a first light source (10) and a first luminescent converter (210); (B) the first light source (10) comprises a solid state light source, wherein the first light source (10) is configured to generate first light source light (11) having a first light source centroid wavelength (λS, 1) selected from the range of 380-420 nm; (C) the first luminescent converter (210) is configured to convert at least part of the first light source light (11) into first converter light (211) having a first converter centroid wavelength (λc, 1) selected from the green-yellow wavelength range; (D) the first light generating device (110) is configured to generate first device light (111) having a spectral power distribution in the wavelength range of 380-780 nm with at least 60% of the spectral power provided by the first light source light (11) and at maximum 40% of the spectral power provided by the first converter light (211).

The invention discloses a color constancy method based on physical imaging characteristics and light source spectral power embedding. According to the method, the consistency of image colors under different illumination conditions is ensured through a series of fine steps. The method comprises the following steps of: firstly, rendering spectral data by adopting a sunlight and ambient light dual-light-source model, converting the spectral data into an RGB space through a CIE standard observer function, and generating spectrums under different color temperatures and corresponding RGB data of the spectrums; then, a characteristic spectrum of a non-shadow area in the scene is extracted to serve as input of a variational auto-encoder, and hidden layer distribution of the auto-encoder guides a light source decoder to output light source spectrum power distribution matched with the label. In addition, spectral features and color and texture features of an RGB image are extracted through a convolutional neural network, and the features are fused to estimate the chromaticity of an image light source. And finally, according to the estimated chromaticity of the light source, performing color correction on the original RGB image by using a colorimetric principle, so that the image color adapts to a standard light source.

The invention provides a light generating system (1000) configured to generate system light (1001) having a spectral power distribution with spectral intensity at a plurality of wavelengths within the wavelength range of 380-780 nm, wherein relative to a total radiant flux of the system light (1001) in the 380-780 nm wavelength range, 15-40% of the total radiant flux is within the 385-440 nm wavelength range, and 60-85% of the total radiant flux is within the 440-780 nm wavelength range, and wherein the system light (1001) has an R9 value of at maximum 85, and a color rendering index selected from the range of 55-85.

The present invention relates to a radiation generating system (1) comprising a radiation unit (2), wherein the radiation unit (2) comprises a light source (3), a first collimator (4), and an optical arrangement (5). The light source (3) is configured to generate light source radiation (100) having a first spectral power distribution having an intensity I1,1 at a first wavelength λ1 and an intensity I1,2 at a second wavelength λ2. The first collimator (4) is configured in a light receiving relationship with the light source (3), wherein the first collimator (4) is configured to collimate the light source radiation (100) into collimated light source radiation (101) having an initial spatial light distribution (ISLD). The optical arrangement (5) is arranged downstream of the first collimator (4) and comprises an optical filter (6) and a diffuser (7). The optical filter (6) has a higher transmission for the first wavelength λ1 than for the second wavelength Xi when irradiated under a predefined angle 0. The first wavelength Xi is selected from the range of 190-230 nm and the second wavelength Xi is selected from the range of 100-190 nm and / or 230-300 nm. The optical filter (6) is configured to filter at least part of the collimated light source radiation (101) into filtered radiation (102) comprising at least portion of the light source radiation (100) of the first wavelength Xi having a first spatial light distribution (SLD1) and at least portion of the light source radiation (100) of the second wavelength λ2 having a second spatial light distribution (SLD2) different from the first spatial light distribution (SLD1). The diffuser (7) is configured downstream of the optical filter (6). The diffuser (7) is configured to diffuse at least part of the filtered radiation (102) into diffused radiation (103) comprising at least a portion of the light source radiation (100) of the first wavelength λ1 having a third spatial light distribution (SLD3) and at least portion of the light source radiation (100) of the second wavelength λ2 having a fourth spatial light distribution (SLD4) different from the second spatial light distribution (SLD2).

The invention provides a spectral reconstruction method and system based on an optimized digital camera spectral response function. The method comprises the following steps: measuring the spectral reflectivity of a training sample; shooting to obtain original format response values of the test sample in different imaging scenes, and recording camera imaging parameters; synchronously measuring light source spectral power distribution of the imaging scene; then, on the basis of a digital camera full-parameter imaging model, the raw response value of a training sample set under the same imaging condition is predicted, maximum and minimum normalization is carried out on the original format response value of a test sample and the predicted training sample set response value in RGB channels, spectral characterization modeling is carried out on the camera, and the spectral characteristic of the camera is obtained; and finally, performing multispectral reconstruction on the test sample under the same imaging condition to obtain reconstructed spectral data of the test sample.

The invention discloses a linkage illumination control method, system and device based on multiple devices and a medium, and relates to the technical field of illumination control, and the method comprises the steps: obtaining illumination space information based on an illumination place, collecting the environment light intensity and personnel action information in an illumination space through the deployment of a sensor, and obtaining the illumination information set by a user; calculating illumination control brightness based on the ambient light intensity and illumination information set by a user, optimizing an illumination spectrum by adjusting spectral power distribution of an illumination light source, and forming an illumination control scheme based on the illumination control brightness and the illumination spectrum; and constructing a personnel action prediction model to predict the user action, generating an illumination control scheme according to the predicted user action in the illumination space position, and further optimizing the personnel action prediction model through a reinforcement learning algorithm and then applying the personnel action prediction model. According to the invention, the optimization of the lighting efficiency ratio is realized, the lighting efficiency is improved, and the flexibility and real-time performance of lighting control are effectively improved.

The invention provides a light generating system comprising one or more light generating devices, a luminescent material, a diffuser element, a polarization changing element, central optics, and a control system, wherein: (A) the one or more light generating devices are configured to generate device light; wherein the one or more light generating devices comprise light sources selected from a laser diode and a superluminescent diode; wherein the device light received by the central optics comprises a controllable polarization; (B) the luminescent material is configured to convert at least part of the device light received by the luminescent material into luminescent material light; (C) the diffuser element is configured to diffuse at least part of the device light received by the diffuser element thereby providing diffused device light while maintaining at least part of the polarization; (D) the polarization changing element is configured in an optical path of the device light between the central optics and the diffuser element; (E) the central optics comprises (i) a central optics polarizing beam splitter, and (ii) a central optics dichroic beam splitter; wherein the central optics are configured to transmit and / or reflect device light, diffused device light, and luminescent material light, received by the central optics in dependence of one or more of their polarizations and their spectral power distributions; (F) the control system is configured to control the polarization of the device light received by the central optics; (G) the light generating system is configured to provide system light comprising one or more of diffused device light and luminescent material light; and wherein the light generating system is configured such that in a first operational mode of the light generating system (a) at least part of the device light irradiates the luminescent material via the central optics, and the luminescent material light escapes from the light generating system via the central optics, and (b) at least part of the device light irradiates the diffuser element via the central optics, and at least part of the diffused device light escapes from the light generating system via the central optics.

The invention provides a light generating system (1000) configured to generate system light (1001), wherein the light generating system (1000) comprises a first light generating device (110), wherein: (A) the first light generating device (110) comprises a first light source (10) and a first luminescent converter (210); (B) the first light source (10) comprises a solid state light source, wherein the first light source (10) is configured to generate first light source light (11) having a first light source centroid wavelength (λs,1) selected from the range of 380-420 inn; (C) the first luminescent converter (210) is configured to convert at least part of the first light source light (11) into first converter light (211) having a first converter centroid wavelength (λc, 1) selected from the green-yellow wavelength range; (D) the first light generating device (110) is configured to generate first device light (111) having a spectral power distribution in the wavelength range of 380-780 nm with at least 60% of the spectral power provided by the first light source light (11) and at maximum 40% of the spectral power provided by the first converter light (211).

The invention provides a light generating system (1000) comprising n first vertical cavity surface emitting lasers (110) and a control system (300), wherein n≥1, wherein each of the n first vertical cavity surface emitting lasers (110) is configured to generate first laser light (111) changing between at least two centroid wavelengths (λnc,1, λnc,2) having a wavelength difference of at least 10 nm, with a changing frequency of at least 50 Hz; wherein the control system (300) is configured to control the n first vertical cavity surface emitting lasers (110) such that system light (1001) is generated comprising the first laser light (111) of at least one of the n first vertical cavity surface emitting lasers (110), and wherein the control system (300) is configured to control a spectral power distribution of the system light (1001), wherein the system light (1001) is white light having a correlated color temperature in a range from 1800 K to 8000 K and a color rendering index of at least 70.

The invention provides a light generating system (1000) comprising light generating devices (110,120,130), a luminescent material (200), a control system (300), optics (500), a polarization control system (600), a diffuser system (1710), and a light exit (1090); wherein: (I) each of the light generating devices (110,120,130) comprise a solid-state light source (10,20,30); the luminescent material (200) is configured to convert at least part of the device light received by the luminescent material (200) into luminescent material light (201): the diffuser system (1710) is configured to diffuse at least part of the device light received by the diffuser system (1710) into diffused device light (711); (II) the optics (500) comprise redirection optics (510); wherein the redirection optics (510) comprise polarization based redirection optics (PPBS1,PBS2) and dichroic based redirection optics (DBS1,DBS2); (III) a first dichroic redirection optics (DBS1) is configured to combine first device light (111) and second device light (121) received by the first dichroic redirection optics (DBS1); the polarization control system (600) is configured to control a polarization of device light propagating from the first dichroic redirection optics (DBS1) to the first polarization redirection optics (PPBS1) via the polarization control system (600); the first polarization redirection optics (PPBS1) is configured to direct device light received from the first dichroic redirection optics (DBS1), in dependence of its polarization, to one or more of (a) the luminescent material (200) via second dichroic redirection optics (DBS2) and (b) the diffuser system (1710) via second polarization redirection optics (PBS2); the second dichroic redirection optics (DBS2) is configured to direct device light received from the first polarization redirection optics (PPBS1) to the luminescent material (200) and to direct the luminescent material light (201) to the light exit (1090); the second polarization redirection optics (PBS2) is configured to direct the device light received from the first polarization redirection optics (PPBS1) to the diffuser system (1710) and to direct diffused device light (711) to the light exit (1090); and (IV) the control system (300) is configured to control a spectral power distribution of system light (1001) of the light generating system (1000).

A horticulture lighting arrangement comprises (i) a lighting system configured to provide horticulture light having a controllable spectral power distribution, and (ii) a control system configured to control the spectral power distribution of the horticulture light; wherein in an operational mode of the horticulture lighting arrangement the horticulture lighting arrangement is configured to provide the horticulture light according to an on-off schedule wherein consecutively an on-period (D) and an off-period (N) are applied.

The invention relates to the field of building light environment design, in particular to a physiological equivalent illumination measurement method and device, and the method comprises the steps: providing various common lamps suitable for an indoor light environment, constructing a light wave feature database, and pre-storing the light wave feature data of various common lamps in the light wave feature database; performing field measurement on the indoor light environment to be detected to obtain actually measured data, wherein the actually measured data comprises absolute spectral power distribution and / or relative spectral power distribution and vertical illumination in the sight line direction of the eye height of the working area; and calculating the physiological equivalent illumination of the indoor light environment based on the light wave characteristic data of the lamp used in the indoor light environment and the corresponding measured data. According to the method, the physiological equivalent illumination of the indoor light environment can be quickly calculated by utilizing the known light wave characteristic data and the actually measured data obtained by field measurement, and the problem that the existing physiological equivalent illumination measurement method is incomplete is solved.

The invention provides a light generating system (1000) configured to generate system light (1001), wherein the light generating system (1000) comprises N first light generating devices (110) and M second light generating devices (120), wherein: (A) each first light generating device (110) comprises a first light source (10) and a first luminescent converter (2100); (B) the first light source (10) is configured to generate first light source light (11); (C) the first luminescent converter (2100) comprises a first luminescent material (210) and a second luminescent material (220); the first luminescent material (210) is configured to convert part of the first light source light (11) into first luminescent material light (211) having a first luminescent material centroid wavelength (λlc1) selected from the range of 510-570 nm; the second luminescent material (220) is configured to convert part of the first light source light (11) into second luminescent material light (221) having a second luminescent material centroid wavelength (λlc2) selected from the range of 625-635 nm; (D) each first light generating device (110) is configured to generate first device light (111) having a spectral power distribution in the wavelength range of 380-780 nm with at maximum 30% of the spectral power provided by the first light source light (11) and at least 70% of the spectral power provided by the first luminescent material light (211) and the second luminescent material light (221); (E) each second light generating device (120) comprises a second light source (20) and a second luminescent converter (2200); (F) the second light source (20) is configured to generate second light source light (21); (G) the second luminescent converter (2200) comprises a third luminescent material (230); the third luminescent material (230) is configured to convert at least part of the second light source light (21) into third luminescent material light (231) having a third luminescent material centroid wavelength (λlc3) selected from the range of 600-660 nm; (H) each second light generating device (120) is configured to generate second device light (121) having a spectral power distribution in the wavelength range of 380-780 nm with at least 70% of the spectral power provided by the third luminescent material light (231) and at maximum 30% of the spectral power provided by the second light source light (21); and (I) in a first operational mode of the light generating system (1000), the system light (1001) is white light having a correlated color temperature in a range from 2000-6500 K and a color rendering index of at least 80.

The present invention provides a light generation system configured to provide system light; wherein the light generation system includes (i) a first light generating device, (ii) a second light generating device, and (iii) a light-emitting material device; wherein: (A) the first light generating device includes a first solid-state light source, the first solid-state light source being configured to generate first light source light having a wavelength selected from the wavelength range of 430-490 nm; wherein the first light generating device is configured to generate first device light; (B) the light-emitting material device includes a first light-emitting material, the first light-emitting material being disposed downstream of the first light source and configured to convert at least a portion of the first light source light received by the first light-emitting material into first light-emitting material light having a first spectral power distribution in the visible wavelength range, the first spectral power distribution having a first centroid wavelength (λc1); wherein the first centroid wavelength (λc1) is selected from the wavelength range of 615-645 nm; wherein the first light-emitting material light includes one or more emission bands having a first full width at half maximum (FWHM1), the first... The full width at half maximum (FWHM2) is selected from a range up to 40 nm; wherein the first luminescent material comprises a luminescent material of the type doped with tetravalent manganese, wherein M comprises an alkaline earth cation, wherein M' comprises a basic cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, wherein X comprises a monovalent anion, and at least fluorine; (C) the second light generating device comprises a second solid-state light source; wherein the second light generating device is configured to generate second device light having a second spectral power distribution in the visible wavelength range, the second spectral power distribution having an emission band having (a) a second centroid wavelength (λc2) selected from a wavelength range of 605-655 nm, and (b) a second full width at half maximum (FWHM2) selected from a range up to 40 nm; and (D) the light generating system is configured such that (a) the first spectral power distribution and the second spectral power distribution at least partially overlap, (b); and (c) in the operating mode of the light generating system, the system light comprises (i) the first luminescent material light and (ii) the second device light.

Systems and methods for collecting and analyzing lighting conditions associated with a physical space in order to effect circadian-effective design. According to certain aspects, a data capture machine may include various sensors and components, such as at least one image sensor that captures digital images of a set of luminaires, at least one laser that detects physical objects as well as the location of the data capture machine in the physical space, a detector that collects a set of spectral power distribution (SPD) measurements, and a video capture device that collects images at a set of locations of the physical space. The data capture machine may aggregate the captured information and generate an electronic file that a computing device may use to present a visual representation of the lighting conditions of the physical space.

The invention provides a radiation generating system comprising a radiation unit, wherein the radiation unit comprises a light source, a first collimator, and an optical arrangement, wherein: (a) the light source is configured to generate light source radiation having a first spectral power distribution having an intensity I1,1 at a first wavelength λ1 and an intensity I1,2 at a second wavelength λ2; (b) the first collimator is configured in a light receiving relationship with the light source, wherein the first collimator is configured to collimate the light source radiation into collimated light source radiation; (c) the optical arrangement is configured downstream of the first collimator and is configured to convert the collimated light source radiation into arrangement radiation; wherein the arrangement radiation is collimated relative to the collimated light source radiation; wherein the optical arrangement comprises a second collimator and an optical filter, wherein: (i) the second collimator is configured downstream or upstream of the optical filter; (ii) the optical filter has a higher transmission for the first wavelength λ1 than for the second wavelength λ2 when irradiated under a predefined angle; (iii) the first wavelength λ1 is selected from the range of 190-230 nm and the second wavelength λ2 is selected from the range of 100-190 nm or 230-280 nm; and (iv) the second collimator is at least partly defined by a plurality of light radiation transmissive channels, wherein the radiation transmissive channels are defined by channel walls which comprise a light absorbing material, wherein the light absorbing material is configured to absorb at least part of the collimated light source radiation received by the light absorbing material.

The invention provides a light generating system (1000) comprising a first light generating device (110), a second light generating device (120), a third light generating device (130), and a control system (3000); wherein: (A) the first light generating device (110) comprises a first solid state light source (10) configured to generate first light source light (11) and a first luminescent converter (2100); (B) the second light generating device (120) comprises a second solid state light source (20) configured to generate second light source light (21) and a second luminescent converter (2200); (C) the third light generating device (130) comprises a third solid state light source (30) configured to generate third light source light (31) and a third luminescent converter (2300); (D) the first, second, and third luminescent converter (2100, 2200, 2300) comprise a narrowband luminescent material (400); wherein the first and second luminescent converter (2100, 2200) further comprise a green-yellow luminescent material (200) and a broadband luminescent material (300); (E) the green-yellow luminescent material (200) is configured to convert the first and second light source light (11, 21) into green-yellow luminescent material light (201); (F) the broadband luminescent material (300) is configured to convert (a) the first and second light source light (11, 21) and / or (b) the green-yellow luminescent material light (201) into broadband luminescent material light (301) having a broadband centroid wavelength (λcb) of 600-670 nm; (G) the narrowband luminescent material (400) is configured to convert the first, second, and third light source light (11,21,31) into narrowband luminescent material light (401) having a narrowband centroid wavelength (λcn) of 610-650 nm; (H) the first light generating device (110) is configured to generate white first device light (111); (I) the second light generating device (120) is configured to generate white second device light (121); wherein: (i) a relative spectral power of the broadband luminescent material light (301) and / or the narrowband luminescent material light (401) in the second device light (121) differs from that in the first device light (111); (J) the third light generating device (130) is configured to generate third device light (131) having a third device centroid wavelength (λcd3) of 610-650 nm; (K) the light generating system (1000) is configured to generate system light (1001) comprising the first, second, and / or third device light (111,121,131); and (L) the control system (3000) is configured to control a spectral power distribution of the system light (1001) by individually controlling the first, second, and third light generating device (110, 120, 130).

The application discloses a kind of LED early fault diagnosis and life prediction method based on spectral power distribution;The present application is based on similarity detection method to carry out fault diagnosis, extracts spectral characteristic value from statistical model, is reduced dimension by principal component analysis, and is clustered using K-means++ method, finally using distance and threshold comparison determines abnormal time.On this basis, long short-term recurrent neural network is established to predict spectral characteristic value, remodel spectrum, and predict remaining useful life.The present application combines spectral power distribution, and carries out fault diagnosis and life prediction to accelerated step aging white light LED based on long short memory recurrent LSTM neural network method, which greatly improves the accuracy of LED early abnormal detection and remaining life prediction.

The invention provides a light generating system (1000) comprising a first light generating device (110) and a control system (300), wherein the first light generating device (110) comprises a first solid state light source (10), a second solid state light source (20), and a luminescent converter (2000), wherein: (A) the first solid state light source (10) is configured to generate first light source light (11) having a first peak wavelength (λp1) selected from the range of 400-490 nm; (B) the second solid state light source (20) is configured to generate second light source light (21) having a second peak wavelength (λp2) selected from the range of 470-540 nm; wherein λp2 - λp1 ≥ 20 nm; (C) the luminescent converter (2000) is configured in a light receiving relationship with the first and second solid state light source (10,20); wherein the luminescent converter (2000) comprises a first luminescent material (210) and a second luminescent material (220); (D) the first luminescent material (210) comprises a luminescent material of the type M'xM2-2xAX6 doped with tetravalent manganese, wherein M' comprises an alkaline earth cation, M comprises a monovalent cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, wherein X comprises a monovalent anion, at least comprising fluorine; wherein the first luminescent material (210) is configured to convert at least part of the first light source light (11) received by the first luminescent material (210) into first luminescent material light (211); (E) the second luminescent material (220) is configured to convert at least part of the second light source light (21) received by the second luminescent material (220) into second luminescent material light (221); wherein the second luminescent material light (221) has a second centroid wavelength (λc2) selected from the range of 600-660 nm; wherein the second luminescent material light (221) comprises at least one emission band having a second full width at half maximum FWHM2 of ≥ 40 nm; (F) the first light generating device (110) is configured to generate first device light (111); wherein in an operational mode of the first light generating device (110), the first device light (111) comprises one or more of the first luminescent material light (211) and the second luminescent material light (221); wherein the first device light (111) has a first device centroid wavelength (λcd1) selected from the range of 600-660 nm; and (G) the control system (300) is configured to control a spectral power distribution of the first device light (111) by controlling the first solid state light source (10) and the second solid state light source (20).

The invention provides a light generating system (1000) configured to generate in a first operational mode of the light generating system (1000) system light (1001), wherein: the system light (1001) in the first operational mode has a spectral power distribution with at least 85% of the spectral power in three emission bands (111,121,131) comprising (i) a first emission band (111) having a centroid wavelength of 445 nm + / −25 nm and having a full width half maximum of at maximum 25 nm, (ii) a second emission band (121) having a centroid wavelength of 541 nm + / −25 nm and having a full width half maximum of at maximum 150 nm, and (iii) a third emission band (131) having a centroid wavelength of 614 nm + / −25 nm and having a full width half maximum of at maximum 25 nm; in the first operational mode the light generating system (1000) is configured to control the spectral power distribution of the system light (1001) in dependence of a radiant flux of the system light (1001) while maintaining a correlated color temperature of the system light (1001) within + / −10% of a predetermined correlated color temperature value; and in the first operational mode the light generating system (1000) is configured to shift a color point (1010) of the system light (1001) towards a lower Duv with decreasing radiant flux of the system light (1001) or to shift the color point (1010) of the system light (1001) towards a higher Duv with increasing the radiant flux of the system light (1001).

The invention discloses a closed-loop LED driving system based on visible light sensor feedback. The closed-loop LED driving system comprises a wireless communication module, a core control module, a voltage conversion module, a constant-current driving module, a light source matrix module and a visible light sensor module. Low-dimensional spectral data of an LED light source are collected in real time through a visible light sensor, the low-dimensional spectral data are reconstructed into high-dimensional spectral power distribution through a neural network model on a microprocessor, driving current of a multi-channel LED is dynamically adjusted through PID closed-loop control on the basis of the difference between the reconstructed spectrum and a target spectrum, accurate tracking and correction are achieved, and high-precision tracking and correction are achieved. The influence of factors such as LED device aging and environment change is effectively overcome, the stability and the consistency of an output spectrum are ensured, and the adaptability and the intelligent degree of a light source are improved.

Some embodiments of a method may include obtaining an image of a real-world environment, determining an estimated illuminant spectral power distribution of an illuminant of the real-world environment, and detecting a region of the image representing human skin. The method may also include determining a representative skin color value for the region and selecting a candidate skin reflectance spectrum based on the estimated illuminant spectral power distribution and the representative skin color value that most closely matches the representative color value. The method may also include updating the estimated illuminant spectral power distribution based on the representative skin color value and the selected candidate skin reflectance spectrum.

The invention provides a light generating system (1000) comprising a light generating device (100), a first luminescent material (210), a second luminescent material (220), and a third luminescent material (230), wherein: (A) the light generating device (100) is configured to generate device light (101) having a peak wavelength selected from the range of 435-475 nm; wherein the light generating device (100) comprises a solid state light source; (B) the first luminescent material (210) is configured to convert part of the device light (101) into first luminescent material light (211) having a color point with u′ values selected from the range of 0.08-0.17 and v′ values selected from the range of 0.5-0.57; (C) the second luminescent material (220) is configured to convert part of the device light (101) into second luminescent material light (221) having a color point with u′ values selected from the range of 0.32-0.4 and v′ values selected from the range of 0.52-0.58; (D) the third luminescent material (230) is configured to convert part of the device light (101) into third luminescent material light (231); wherein the third luminescent material has a centroid wavelength (λ3c) selected from the range of 620-650 nm and a full width half maximum of 60 nm or smaller; (E) the light generating system (1000) is configured to generate system light (1001) having a (system light) spectral power distribution comprising device light (101), first luminescent material light (211), second luminescent material light (221), and third luminescent material light (231); wherein the (system light) spectral power distribution has a first spectral power (E1p) at a first peak maximum (λ1p) of the first device light (101) and a second spectral power (Em) at a minimum between the first peak maximum (λ1p) of the first device light (101) and a second peak maximum (λ2p) of the first luminescent material light (211); and (F) the light generating device (100) and the luminescent materials (210,220,230, . . . ) are selected such that 1.0≤E1p / Em≤6.0.

The application discloses a light source color resolution evaluation method, device and equipment and a storage medium, and relates to the technical field of light source quality testing. The spectral power distribution of a test light source is acquired under multiple exit angles, and the bidirectional reflectance factor of a test color sample is combined to calculate three stimulus values and white point three stimulus values. The hue angle, brightness value and saturation value of each test color sample under the exit angle are calculated according to the three stimulus values and the white point three stimulus values. The comprehensive color error value of the test light source relative to a reference light source under the exit angle is obtained according to the aforementioned three parameters. The color resolution index of the test light source is obtained according to the neutral density index of the test light source and the comprehensive color error value corresponding to each exit angle. The spectral power distribution is collected under multiple exit angles, the color rendering performance of the light source in the front is considered, and the spectral output difference under different angles is also considered, so that the color rendering consistency and the directional characteristics of the light source in the spatial distribution can be comprehensively reflected.

This invention discloses a method and system for quantifying the color discrimination ability of both natural and artificial light sources. The method first measures the spectral power distribution of the light source to be evaluated. S ( l The illuminance E was then calculated; subsequently, the neutrality index of the light source was calculated in a uniform color space. S neutral The continuous color difference index (SCD) is calculated based on the chromaticity values ​​of a set of continuous color samples in a uniform color space; a segmented illuminance correction function is output according to the illuminance range; finally, the neutrality index is... S neutral The continuous color difference index (SCD) and illuminance correction function are uniformly input into a preset light source color discrimination capability quantification model G to calculate a comprehensive evaluation value. This invention comprehensively quantifies color discrimination capability from three dimensions: spectral characteristics of the light source, neutrality, and illuminance level. It effectively solves the technical problems of existing models failing to represent the spectrum under natural light and being unable to accurately quantify the nonlinear visual response of the human eye under extremely large illuminance spans.

This invention provides a method for measuring the radiation of a display field, enabling the measurement of hyperspectral information of a display screen under test. Specifically, the method includes: S1: controlling the display screen under test to display a first set of images, and using the spectral measurement device to obtain the spectral power distribution of region A of the display screen under test under the corresponding image; S2: selecting two or more specific filters based on the spectral power distribution of region A obtained in step S1; S3: controlling the display screen under test to display a second set of images, sequentially inserting the filters selected in step S2 into the optical path, and the light from region B of the display screen under test being received by an area array sensor through an imaging lens and the filters; S4: calculating the spectral power distribution of each position point in region B of the display screen under test when displaying the second set of images, based on the pixel response value of the area array sensor in step S3 and the spectral power distribution of region A of the display screen under test in step S1.

The present invention provides a spectral reconstruction method and system based on optimizing the spectral response function of a digital camera, comprising: measuring the spectral reflectance of a training sample; photographing and obtaining the original format response values of the test sample under different imaging scenes and recording the camera imaging parameters; synchronously measuring the spectral power distribution of the light source of the imaging scene; then, based on a full-parameter imaging model of the digital camera, predicting the raw response values of a training sample set under the same imaging conditions, performing maximum and minimum normalization on the original format response values of the test sample and the predicted response values of the training sample set in three RGB channels, performing spectral characteristic modeling on the camera, and finally performing multi-spectral reconstruction on the test sample under the same imaging conditions to obtain reconstructed spectral data of the test sample.

The invention may provide a light generating system (1000) comprising (i) one or more light generating devices (100), (ii) a first luminescent material (210), (iii) a reflector (2510), (iv) a rotatable element (1200), and (v) a control system (300); wherein the one or more light generating devices (100) are configured to generate device light (101); wherein the one or more light generating devices (100) comprise one or more of a laser diode and a super light emitting diode; the first luminescent material (210) is configured to convert at least a portion of the device light (101) received by the first luminescent material (210) into first luminescent material light (211); the reflector (2510) is configured to reflect at least a portion of the device light (101) received by the reflector (2510) as reflected device light (711); the rotatable element (1200) comprises a first annular section (2131) and a second annular section (2132); the first luminescent material (210) is comprised by at least a portion of the first annular section (2131); and the reflector (2510) is comprised by at least a portion of the second annular section (2132); the light generating system (1000) is configured such that: (a) in an operating mode of the light generating system (1000), the rotatable element (1200) rotates such that different portions of the first annular section (2131) and / or different portions of the second annular section (2132) are illuminated by the device light (101) over time, and (b) the distribution of the device light (101) over the first annular section (2131) and the second annular section (2132) is optically and / or mechanically controllable; and wherein the light generating system (1000) is configured to generate system light (1001), the system light (1001) comprising one or more of first luminescent material light (211) and reflected device light (711); and the control system (300) is configured to control the spectral power distribution of the system light (1001) by optically and / or mechanically controlling the distribution of the device light (101) over the first annular section (2131) and the second annular section (2132).