40 results about "Spectral color" patented technology

The invention discloses a partial discharge detection method and device based on discharge spectrum chromaticity, and belongs to the technical field of power systems, and the method comprises the steps: collecting a plurality of discharge optical signals of switch cabinet equipment; for each discharge optical signal, carrying out chromaticity analysis on the RGB monochromatic light signal, and respectively calculating color chaos degree, spectrum color gamut deviation degree, spectrum chromaticity dynamic coupling parameters and hue purity ratio; calculating a chromaticity difference weight based on the full-band optical signal and the RGB monochromatic light signal; performing weighted integration on the color chaos degree, the spectrum color gamut deviation degree, the spectrum chromaticity dynamic coupling parameter and the hue purity ratio based on the chromaticity difference weight to obtain a chromaticity comprehensive magnitude; calculating the mean value of the comprehensive chromaticity values of the plurality of discharge optical signals; and comparing the chromaticity comprehensive magnitude mean value with the plurality of judgment chromaticity ranges, and determining a discharge type detection result of the switch cabinet equipment. According to the invention, the problem of low accuracy of partial discharge detection in the prior art can be solved.

The invention belongs to the technical field of microobjective optical design, and provides a long-working-distance flat-field apochromatic microobjective capable of forming phase difference, so as to solve the technical problem that an existing microobjective is poor in imaging effect on a transparent sample, a switchable phase ring with a coating film is arranged at a rear focal plane and used for delaying the light wave phase of the sample, and the imaging effect of the sample is improved. Phase difference is formed by interference with background light; the optical system is sequentially and coaxially provided with a first balsaming lens, a third lens, a second balsaming lens, a seventh lens and an eighth lens from the image space to the object space along the optical axis, and the focal lengths of the lenses meet the condition that fG1 / f is larger than-6 and smaller than 0; 0 < fG2 / f < 6; 0 < f3 / f < 10; 0 < f7 / f < 3; and f8 / f is greater than 0 and less than 10, so that a working distance of 3.0 mm and system resolution are ensured, secondary spectral aberration can be corrected to realize apochromatic, the field curvature defect of an optical system is overcome, the imaging quality of the field edge is improved, and the optical system can be applied to the technical fields of bioengineering and medicine.

The invention relates to the technical field of multi-spectral colorimeter inter-table difference reduction, and discloses a method and device for reducing multi-spectral colorimeter inter-table difference, electronic equipment and a medium, and the method comprises the steps: measuring a set number of color cards to obtain measurement matrixes of different colorimeters, and then selecting one colorimeter from the preset colorimeter group as a standard colorimeter, taking the rest colorimeters as to-be-calibrated colorimeters, and establishing a conversion relation between the standard measurement matrix and the to-be-calibrated matrix. The method has the beneficial effects that the consistency between the to-be-calibrated colorimeter and the standard colorimeter is greatly improved, the calibration procedure is simplified, the reliability and consistency of the calibrated colorimeter in practical application are also improved, the applicability of the multispectral sensor in the corresponding color measurement field is enhanced, and the method is suitable for popularization and application. The cost performance and application universality of the multispectral colorimeter are remarkably improved, and a more stable and accurate color measurement solution is provided for various industries.

An image spectrum technology-based geological sketching method, including: based on collected image-spectrum data information of a tunnel face, extracting mineral end members and spectrum to determine types and contents of minerals, extracting texture features and feature waveband spectrums to determine stratum lithology, extracting crack features and identifying crack fillers to obtain a crack identification result; obtaining degrees of crushing of surrounding rocks according to numbers and relative areas of cracks; analyzing weathering variation proportions of minerals according to stratum lithology and mineral analysis result for surrounding rocks, acquiring color differences between different degrees of weathering according to spectral color difference identification results, obtaining degrees of weathering of the surrounding rocks; identifying water outflow form and water outflow position of tunnel face to be detected; and obtaining a geological sketch map for the tunnel face by performing labeling and summarization by using different labeling symbols according to the results.

The utility model relates to a color-changeable plant lighting device. Comprising a base box internally provided with a controller, the top of the base box is provided with a cage-shaped protective frame, the cage-shaped protective frame is internally provided with a center cylinder, the outer wall of the center cylinder is provided with a plurality of sets of lighting lamp tubes which are arranged at equal-angle intervals in the circumferential direction, and the length direction of the lighting lamp tubes is parallel to the axial direction of the center cylinder; each group of lighting lamp tubes has different spectral colors; a top shaft sleeve and a rotating shaft are arranged between the top of the center cylinder and the top of the cage-shaped protection frame, a bottom shaft sleeve and a rotating shaft are arranged between the bottom of the center cylinder and the top of the base box body, and a rotation driving assembly for driving the center cylinder to rotate is installed in the base box body. A setting knob is installed outside the base box body, and a lampshade is further installed on the side portion of the cage-shaped protection frame. The utility model provides a color-changeable plant lighting device which can adjust and set the spectrum type of supplementary lighting and can be moved to meet the supplementary lighting requirement of a specific area in a planting room.

The invention provides an epoxy resin material only receiving 600-700 nm transparent red light. The epoxy resin material comprises A color agent epoxy glue, B color agent epoxy glue and a curing agent, the A color agent epoxy glue is red light efficient cut-off color paste, and the B color agent epoxy glue is infrared ray efficient cut-off color paste; after the A color agent epoxy glue and the B color agent epoxy glue are mixed according to a preset proportion, a curing agent is added for curing. According to the epoxy resin material capable of only receiving red light with the wavelength of 600-700 nm, provided by the invention, the color A epoxy glue, the color B epoxy glue, the curing agent and the like are mutually matched, the color A is used for filtering spectrums with the wavelength of 580 nm or below, the color B is used for cutting off spectrums with the wavelength of 700-1100 nm, and the color A and the color B form synergistic complementation according to the mass ratio of (1: 1)-(3: 2); after being cured by the curing agent, epoxy only allows red light in the wave band of 600nm-700nm to penetrate through, stray light in other wave bands is effectively shielded, and the detection precision is improved, so that the problem that the detection precision is insufficient due to the fact that existing epoxy resin cannot accurately screen the red light in the wave band of 600nm-700nm and stray light interference is solved.

The invention relates to the technical field of vision and spectral measurement, and discloses an automobile ornament chromatic aberration detection method based on image recognition, which comprises the following steps: setting a known spectral reference spot on site and collecting multiband imaging response and spectral color measurement data, and constructing closed linear mapping to estimate a pixel-level discrete reflectance spectrum; performing energy normalization on the estimated spectrum, and calculating a spectrum gravity center, a spectrum width, first-order differential energy and second-order differential energy to form a spectrum signature; constructing a self-adaptive threshold value based on a local reference region statistical median and a robust scale, and classifying abnormal pixels by adopting a determination logic of a spectrum angle and a signature standardization distance; the method is suitable for online and offline appearance detection scenes of a production line, and can distinguish the overall color cast and spectral distortion, thereby improving the interpretability and robustness of the whole area array detection.

The invention discloses a deep thrombus quantitative measurement method and device based on a photoacoustic imaging technology, signals of a deep thrombus lesion area and signals of adjacent blood vessels are directly measured in the same area, invasive detection is not needed, and the deep thrombus quantitative measurement method is a nondestructive detection method and is convenient for clinical use; according to the method, near blood vessel signals are used as endogenous calibration factors, so that measurement errors caused by direct measurement of a deep thrombus area due to a spectrum coloring effect can be effectively calibrated, and a more accurate quantitative measurement result is obtained; the light absorption property of the overlying tissue of the lesion area does not need to be considered, so that the detection process is simplified, the calculation complexity is reduced, and the method is simpler and easier to use; a reconstruction algorithm and a calibration method based on simple calculation are used, priori knowledge and complex simulation calculation of a tissue environment are not needed, calculation resources are saved, the method has the advantages of being simple and easy to use, the accurate light absorption spectrum of the lesion thrombus in the deep tissue can be rapidly obtained, and the method is suitable for large-scale popularization and application. Therefore, a valuable reference is provided for clinical diagnosis and judgment of thrombus.

The invention relates to the technical field of spliced telescopes, and particularly provides a spliced mirror surface seamless spectral measurement method, which comprises the following steps: irradiating a spliced mirror surface by using incident light, selecting two sub-mirrors by using an aperture masking method, opening aperture channels of the two selected sub-mirrors, closing aperture channels of other sub-mirrors, and carrying out spectral measurement on the spliced mirror surface. Performing dispersion on two beams of reflected light reflected by the two selected sub-mirrors to obtain two beams of spectral dispersion light, performing interference on the two beams of spectral dispersion light, expanding interference fringes with different wavelengths in a direction perpendicular to dispersion, performing detection to obtain a two-dimensional interference spectrum, performing pose adjustment on the two selected sub-mirrors to realize spectrum alignment, and performing spectrum alignment. The spectrums of all the sub-mirrors of the spliced mirror surface are aligned through iteration, aperture channels of all the sub-mirrors are opened, and the seamless spectrum of the spliced mirror surface can be measured. According to the invention, the seamless spectrum of the spliced mirror surface with high signal-to-noise ratio, good continuity and resolution close to diffraction limit can be obtained.

The invention discloses multifunctional optical thin film detection equipment, and relates to the technical field of optical material detection. Comprising an equipment body, a uniform backlight source, a reflection type brightness enhancement film assembly, a multifunctional measuring jig and a handheld spectrum color illuminometer, the uniform backlight source is arranged on the equipment body and connected with an equipment cover through a hinge, and the multifunctional measuring jig is inserted into the uniform backlight source; a reflection type brightness enhancement film assembly or a standard optical film is arranged above the multifunctional measuring jig, and a containing groove for containing a handheld spectrum color illuminometer is formed in the side edge of the equipment body. According to the birefringence detection device and method, through the multiple polarization circulation effect of the reflection type brightness enhancement film, polarization changes caused by birefringence of the film to be detected are amplified and converted into measurable brightness differences, and low-cost and high-sensitivity detection of the birefringence degree of optical films such as BOPET is achieved. Meanwhile, switching between white light and blue light is supported, various optical film testing requirements are met, and the advantages of integration, damage prevention, easy and convenient operation and the like are achieved.

The application discloses a wide-spectrum lens for ultraviolet to visible light bands, which comprises first to eighth lenses arranged in sequence along the light path propagation direction, wherein the first and second lenses are glued together to form a glued lens, and the fifth and sixth lenses are glued together to form a glued lens; the third lens is a negative double-concave thick lens; the first, fourth, fifth and seventh lenses are double-convex positive lenses; and the second, sixth and eighth lenses are negative double-concave thin lenses. The wide-spectrum chromatic aberration, on-axis and off-axis aberration of the lens are well balanced, the optical transfer function of the system is improved, the imaging quality is high, and the actual use requirements of the wide-spectrum imaging from ultraviolet to visible light are met.

The present disclosure provides a wearable device and a health monitoring method. The wearable device comprises a spectrum detection module for detecting light signals of at least three light wave bands from different external environments in real time and converting into spectrum information; a communication module for transmitting each spectrum information and time information of the spectrum information to a processing module, which is arranged inside the wearable device or independent of the wearable device; the processing module is used for: classifying and labeling each spectrum information according to a classification algorithm to obtain a classification label of the spectrum information; performing color temperature calculation on each spectrum information to determine the spectrum color temperature of the spectrum information; constructing a first health warning model according to the classification labels of the plurality of spectrum information, the spectrum color temperature corresponding to each classification label and the time information; and a display module for displaying the first health warning model.

This invention discloses a brightness-controllable pseudo-color enhancement method based on multi-spectral color space fusion. The implementation steps are: quantizing a 14-bit infrared image into a 16-bit image and enhancing it using the algorithm constructed in this invention; constructing a high grayscale infrared image HIS pixel self-transformation mapping function and a brightness-adjustable RGB mapping function to map the enhanced 16-bit grayscale image to a 24-bit RGB color image. This invention solves the problem that 14-bit infrared images cannot be properly displayed on conventional 8-bit displays, and by mapping the 16-bit image to a 24-bit RGB image through the mapping function, it improves the visual quality of infrared images. It is highly practical and has high promotional value, and can be widely applied to image processing algorithms for vehicle-mounted infrared images, SAR images, and similar images, providing reliable application support for related fields.

This invention provides a lighting adjustment system for infants and young children. The system includes an adjustable light source capable of controlling various lighting conditions such as spectral color temperature, brightness, flicker rate, and duration. Simultaneously, the system also features a feedback mechanism to monitor the establishment of sleep rhythms and cognitive responses in infants and young children. Furthermore, this invention includes judgment software that automatically adjusts lighting conditions based on feedback data to promote improvements in the REM sleep development curve, the establishment of healthy and stable sleep rhythms, and ultimately, the development of cognitive abilities in infants and young children.

The invention relates to the field of electrical digital data processing, and relates to a multispectral color data calibration method and system based on multisource perception data fusion, and the method comprises the steps: obtaining original color data and environment data of a target object measured by a multispectral sensor; judging whether the original color data meets a calibration condition or not; if the original color data meets the calibration condition, calling main reference color data corresponding to the multispectral sensor; comparing the original color data with the main reference color data, and calculating to obtain a first compensation parameter for correcting an inherent difference value between the equipment; the environment data are input into a preset environment compensation model, a second compensation parameter is output through the environment compensation model, and the second compensation parameter is used for correcting the environment interference value; and performing fusion calibration on the original color data by using the first compensation parameter and the second compensation parameter to generate calibrated color data. Data of different devices and in different environments are normalized to objective standards.

1. Name of the Design Product: Spectral Color Haze Transmittance Clarity Measuring Instrument. 2. Use of the Design Product: Used to measure spectral color haze transmittance clarity. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photo that Best Illustrates the Design Key Points: Perspective View 1.

The utility model discloses a fluorescent powder spraying device for a backlight source wafer of a full-spectrum display system, which comprises a spraying box and a material box arranged at the top of the spraying box, a position-adjustable mounting seat is arranged in the spraying box, a nozzle is arranged at the bottom of the mounting seat, a pipeline communicated with an inner cavity of the nozzle is arranged on the side surface of the mounting seat, and the material box is arranged on the material box. The end, away from the nozzle, of the pipeline communicates with the bottom of the inner cavity of the material box, an air inlet assembly communicating with the inner cavity of the material box is arranged on the side face of the spraying box, and a filtering assembly is arranged at the air inlet end of the air inlet assembly. According to the fluorescent powder spraying device for the backlight source wafer of the full-spectrum display system, a full-spectrum backlight source display product is developed by adopting a spectrum color complementing technology that the purple light wafer is matched with blue powder, cyan powder, green powder and red powder on the backlight source, heating treatment can be conducted on the fluorescent powder in the fluorescent powder spraying color complementing process, the adhesion performance of the fluorescent powder is improved, and the quality of the backlight source product is guaranteed.

To provide a calculation method and manufacturing method for paint that can perform computer color matching regardless of the type of color measurement device.SOLUTION: The calculation method of the present invention comprises a process of converting the direct-reading method of tristimulus values to the spectral colorimetry method, which is used for computer color matching.SELECTED DRAWING: Figure 6

The present invention provides an interactive feedback acquisition and analysis method for the motion device and environment color of a spacecraft, which relates to the technical field of spacecraft motion control. The method includes collecting multi-spectral color information of the environment, constructing a color feature mapping matrix, calculating a color gradient field and segmenting feature regions, executing a quantum color feature analysis algorithm to generate an optimal motion trajectory, obtaining motion parameters, executing a motion state decision algorithm to generate control instructions, adjusting the motion state, and recording interactive feedback data. The present invention can achieve the interactive feedback between the spacecraft motion device and the environment color, improve the motion control accuracy and environmental adaptability, and provide a new technical solution for the intelligent control of spacecraft.

A light source module and a luminaire are disclosed. The light source module includes at least one multi-channel light-emitting unit. Each multi-channel light-emitting unit includes multiple individually controlled LED light sources according to their light-emitting channels. According to their spectral peak wavelengths, the LED light sources include at least a first monochromatic LED light source with a first spectral peak wavelength, a second monochromatic LED light source with a second spectral peak wavelength, a third monochromatic LED light source with a third spectral peak wavelength, and a first composite LED light source with at least a fourth spectral peak wavelength. The first, second, and third spectral peak wavelengths are located in the first, second, and third spectral ranges, respectively, and the fourth spectral peak wavelength is different from all three spectral peak wavelengths. The first composite LED light source is a non-white light source, and its spectral color coordinates are located in the region above the Planck blackbody radiation curve in the CIE 1931-xy chromaticity diagram. This invention can improve lighting performance and user experience.

The application discloses a parameterized spectrum active light-emitting light source chrominance mapping method, product and medium, relates to the LED display control technical field, and solves the problems that the prior art lacks a prediction method directly connecting the spectrum shape parameters of an active light source with chrominance coordinates, the design stage is inefficient, the existing model has poor applicability, and the internal law of spectrum-chrominance is not well understood. A spectrum vector is acquired; the acquired spectrum vector is normalized to generate a normalized spectrum of the active light-emitting light source; a standard color matching function is acquired; based on the generated normalized spectrum of the active light-emitting light source and the acquired standard color matching function, three stimulus values corresponding to the active light-emitting light source are calculated; and based on the calculated three stimulus values corresponding to the active light-emitting light source, chrominance coordinates of the active light-emitting light source and relative brightness values related to the light efficiency potential of a parameterized spectrum shape function of the active light-emitting light source are determined respectively.

The invention discloses a fabric color extraction and comparison method, which comprises the following steps of: S1, installing and opening a program by using a mobile phone, and turning on a power supply of handheld equipment; s2, automatically searching a handheld device near a link by the program; s3, selecting a colorimetric function, aligning a handheld device with the source fabric, and pressing an acquisition button; s4, the handheld device collects spectral data and transmits the spectral data to the mobile phone through Bluetooth; s5, the mobile phone processes the spectral data, calculates an RGB color value according to a spectral color library, and feeds back and displays the RGB color value on a mobile phone screen; s6, the handheld device is aligned with the target fabric and presses an acquisition button; s7, collecting data again, and feeding back and displaying the data on the screen of the mobile phone; step S8, comparing the two times of data; and S9, feeding back a conclusion on a screen, and realizing quantified color data and preview, so that a method for accurately comparing the colors of the fabric with reference significance is generated, a practitioner obtains a reliable result by using the scheme, the working efficiency is improved, and the working value is improved.

The application discloses a cold-rolled steel plate surface color difference defect control method, and relates to the related field of cold-rolled steel plate processing.The cold-rolled steel plate surface color difference control method has the advantages that the online spectrum color difference detection is combined with the annealing furnace exhaust odor characteristic monitoring, the double-dimension judgment of the annealing process atmosphere state and the surface oxidation film change is realized, compared with the traditional mode of only relying on the color difference result for after-regulation, the method is more real-time and predictive, the system can identify the atmosphere abnormal trend in advance through the odor characteristic change before the color difference has obvious deviation, and the compensation adjustment of the hydrogen proportion, the dew point and the furnace temperature is automatically executed, so that the generation of the color difference defect is effectively prevented; when the color difference and the odor signal are synchronously abnormal, the system can also quickly respond and recover to the stable interval, the color difference control precision is greatly improved, the method can significantly improve the consistency of the steel plate surface brightness and color, improve the color difference qualified rate and reduce the product waste caused by the annealing abnormality.

The invention provides a building color painting repair color calibration auxiliary device which comprises a base, a scanning frame, an analysis table and a color mixing box, the scanning frame is arranged on the base, a spectrophotometer is arranged on the scanning frame, the analysis table is arranged beside the scanning frame, an analysis computer is arranged on the analysis table, and a color mixing box is arranged on the analysis computer. The spectral color photometer is connected with the analysis computer through a signal line, the spectral color photometer is used for shooting a repaired color part and inputting data into the analysis computer, the color is analyzed through the analysis computer, and the color mixing box is positioned beside the analysis table and is also connected with the analysis computer through a signal line. Color analysis is carried out on the position needing color comparison through the spectrophotometer on the scanning frame, meanwhile, the electric valve in the color mixing box is controlled to work through the analysis computer, the use amount of pigment is accurately controlled, and a user can conveniently and rapidly mix the pigment with the consistent color difference.

The invention relates to the technical field of chemical analysis of oil products, and particularly discloses a method for judging an acid value titration end point of electric oil based on a color titration method. The method comprises the following steps: acquiring time-varying data of a solution color depth value in a titration process in real time by virtue of a spectrum color sensor, fitting a color titration curve by virtue of a high-order polynomial, calculating the curvature of the fitted curve point by point, and taking a curvature peak point which appears for the first time and has a curvature value of 0.2-2 as a titration end point. The method overcomes the defects that a traditional indicator titration method is strong in subjectivity, an automatic potentiometric titration method is easy to pollute an electrode and has no potential jump, and the like, avoids adverse effects of colors of different oil samples on the RGB value of the titration end point when the end point is judged by the color RGB value in an existing color titration method, and is objective and accurate in titration end point judgment, excellent in repeatability and high in accuracy. The method is suitable for measuring the acid value of electric oil. The method is easy and convenient to operate, economical, environmentally friendly, efficient, accurate and high in application and popularization value.

This invention discloses a fluorescent glass material for high-power LEDs, its preparation method, and its application, relating to the field of inorganic glass luminescent materials. The technical solution of this invention includes the following components: glass powder and phosphor, wherein the glass powder is composed of SiO2, B2O3, Al2O3, CaO, Y2O3, and Na2O, and the phosphor is Y3Al5O3. 12 :Ce 3+ Y3Al5O 12 :Ce 3+ Phosphors are mixed with low-melting-point glass powder SiO2-B2O3-Al2O3-CaO-Y2O3-Na2O, pressed into a compact, sintered, and then cut, ground, and polished to obtain a yellow fluorescent conversion material. By optimizing the phosphor concentration and the thickness of the fluorescent glass, the color temperature, color rendering index, and color coordinates of the white light spectrum can be easily controlled, with a maximum luminous efficiency of ~140 lm / W, which can be used in high-power LED white light lighting and display fields.

Operating circuit for operating LED lines, comprising - at least two LED sections (5a, 5b) operated in parallel, wherein the LED sections (5a, 5b) are designed to emit light in the white spectrum, wherein the LED sections (5a, 5b) differ from one another with regard to the color temperature of their spectrum, and - a control circuit (SS1, SS2) which can be supplied with an AC voltage and is designed to supply the LED sections (5a, 5b) with a rectified AC supply voltage and with an adjustable total current (I G ), and wherein the control circuit (SS1, SS2) is designed to evaluate the AC voltage and, depending on phase information, such as phase angle or phase section of the AC voltage, to divide the total current (I G ) to the parallel operated LED sections (5a, 5b).

The utility model discloses a periscope formula spectrum colorimeter, including shell, color wheel disc, intelligent camera and camera lens, and color wheel disc rotation is connected in the front side of shell, and intelligent camera is coaxial with camera lens and is arranged, and intelligent camera is in the back side of shell, and periscope one end is equipped with the light entrance mirror, and the other end is equipped with the light exit mirror, periscope is integrated on color wheel disc, and effective utilization space has solved the shortcoming that traditional imaging colorimeter has no spectrum diagram. The imaging colorimeter of integrated spectrometer can carry out data calibration to the measured sample at the test site, so that the data measured by the imaging colorimeter is more accurate, and convenient to use. The spectrum diagram is obtained through the operation analysis in the spectrometer, the spectrum data and the image are fused, the multispectral data cube or color analysis report is generated, and the spectral characteristics (such as reflectivity, radiation intensity) of the target are obtained.

The invention discloses an active light-emitting source chromaticity mapping method for a parameterized spectrum, a product and a medium, relates to the technical field of LED display control, and solves the problems of low efficiency in a design stage, low cost and the like due to lack of a prediction method for directly connecting active light source spectrum shape parameters and chromaticity coordinates in the prior art. And an existing model is poor in applicability and insufficient in understanding of a spectrum-chromaticity inherent rule. Obtaining a spectral vector; normalizing the obtained spectrum vector to generate a normalized spectrum of the active light-emitting light source; obtaining a standard color matching function; calculating a tristimulus value corresponding to the active light-emitting source based on the generated normalized spectrum of the active light-emitting source and the obtained standard color matching function; and based on the calculated tristimulus values corresponding to the active light-emitting light source, respectively determining chromaticity coordinates of the active light-emitting light source and a relative brightness # imgabs0 # value related to the luminous efficiency potential of the parameterized spectral shape function of the active light-emitting light source.

A high-color gamut LED packaging structure and a production method therefor. The structure comprises a support, the support being used for providing physical support and electrical connection for elements mounted on a support. An LED chip is mounted on a top surface of the support, and a packaging mechanism is sleeved on the exterior of the LED chip. The packaging mechanism comprises packaging glue, a fluorescent powder being mixed in the packaging glue, and the color of the fluorescent powder being red. The LED chip comprises multi-quantum well layers, and the multi-quantum well layers are used for generating light having different wavelengths. Blue light and green light multi-quantum well layers are integrated in the LED chip, and in combination with with the external red fluorescent powder, when LED lamp beads are electrified to emit light, due to a spectrum composed of blue light of the chip, green light of the chip and red fluorescent powder, the NTSC color gamut is higher than that of blue light excited fluorescent powder, multiple colors of light are directly generated on a single chip, dependence on a pure chip scheme is reduced, and fewer chips are used than in a pure chip scheme, thereby reducing costs.