2584 results about "Blue light" patented technology

The invention relates to the technical field of semiconductors, and particularly discloses a multiband LED chip and a preparation method thereof, and a white light LED light source, the LED chip comprises a light-emitting layer, and the light-emitting layer comprises a first cyan light multi-quantum well layer, a second long-wave blue light multi-quantum well layer, a third short-wave blue light multi-quantum well layer and a fourth purple light multi-quantum well layer which are sequentially stacked in the epitaxial direction; the first cyan light multi-quantum well layer, the second long-wave blue light multi-quantum well layer, the third short-wave blue light multi-quantum well layer and the fourth purple light multi-quantum well layer are each of a periodic structure formed by alternately stacking well layers and barrier layers, and the light-emitting wavelengths of the first cyan light multi-quantum well layer, the second long-wave blue light multi-quantum well layer, the third short-wave blue light multi-quantum well layer and the fourth purple light multi-quantum well layer are sequentially decreased. And the forbidden band widths of the barrier layers are sequentially decreased. According to the LED chip, the overall excitation efficiency can be effectively improved, and the output full-spectrum white light LED light source is higher in color rendering index, better in stability, less in damage to human eyes and high in light emitting efficiency.

The invention relates to the technical field of image processing, in particular to a road area intelligent extraction system for unmanned aerial vehicle aerial images, and the system comprises an image noise filtering module which analyzes and inputs frequency domain information of the unmanned aerial vehicle aerial images, recognizes a target noise mode, and filters the unmanned aerial vehicle aerial images. According to the method, frequency domain noise analysis and notch filtering are combined, the sharpness of the road edge is reserved, meanwhile, high-frequency noise and periodic interference are restrained, and the visibility of a low-contrast road area is improved; local pixel spectrum dispersion calculation is introduced and is dynamically fused with morphological parameters, and direction consistency and length-width ratio constraints are combined, so that the connectivity perception capability of the fragmented non-paved road is enhanced, and the fracture misjudgment under the form-changeable terrain is reduced; a normalized vegetation index and multi-band reflectivity are combined for modeling, water reflection interference is eliminated through a blue light band standard deviation, and a space mask of a non-road surface feature interference area is constructed.

The invention relates to the technical field of display, and particularly discloses an intelligent self-adaptive eye protection display system which sequentially comprises a content analysis module, an ambient light detection module, an eye protection parameter calculation module, a display parameter adjustment module and a user feedback module. The system identifies the screen content type and the dynamic degree in real time, synchronously detects the ambient light intensity and the color temperature, obtains the optimal combination of the blue light proportion, the brightness, the contrast ratio, the color temperature and the sharpness through a multi-target optimization model, and smoothly adjusts the display through driving; a user can score, finely adjust and mark a scene, and feedback data enters a self-learning engine to iteratively update a parameter weight so as to form a content-environment-user closed loop. The system can significantly reduce blue light harm and improve visual comfort without external hardware.

The invention discloses a holographic projection system based on an AI large model. According to the invention, through the nano-scale optical coating and environment self-adaptive adjustment technology, harmful blue light is effectively filtered, environment light parameters are dynamically matched, the problem that eyes are injured by a common screen is solved, and the method is especially suitable for long-time learning scenes of children. The holographic projection core module adopts a naked eye 3D light field technology, presents complex models such as dinosaur, marine organisms and the like in a three-dimensional suspension manner through high-fidelity color restoration and dynamic depth-of-field adjustment capability, and is matched with gesture touch control and voice instructions of multi-mode interaction hardware, so that a user can directly touch a virtual object, and the real-time performance of the virtual object is improved. Experience upgrading from plane observation to space interaction is achieved, and knowledge such as English learning and animal and plant cognition is converted into interactive games and story narration through virtual teacher images and scene scripts. The autistic children can complete social dialogue training under the guidance of the virtual role, the system analyzes emotion fluctuation in real time and adjusts a guidance strategy, and social fear is gradually eliminated.

The invention relates to an intelligent sleep adjusting method and system based on closed-loop acousto-optic brain wave entrainment, electroencephalogram (EEG) signals are collected and preprocessed in real time through a wireless dry electrode, and high-precision sleep staging is achieved through a deep learning model. The system adopts a fuzzy PID (Proportion Integration Differentiation) controller to dynamically adjust acousto-optic synergistic stimulation: an acoustic module generates binaural beat signals, an optical module outputs blue light (470nm) and amber light (590nm) pulses, and the brain wave entrainment efficiency is enhanced through phase synchronization (the phase difference is less than or equal to 10 degrees) and golden section frequency coupling (fL is equal to 1.618 fA). Parameters are updated every 30 seconds through closed-loop feedback, the sound pressure level (30-50 dB) and the light intensity (10-100 lux) are adjusted according to the Weber-Fechner law, and the response delay is lt; the time is 200 ms. A three-level safety mechanism monitors gamma wave abnormity, epilepsy sample discharge and impedance overrun in real time, and triggers graded protection (alarming, cutting off light stimulation and shutdown). Clinical verifications show that the entrainment success rates of the delta wave and the theta wave respectively reach 71% and 68%, the sleep improvement effect is good, and a safe and efficient intervention scheme is provided for sleep disorders.

The invention provides a visual fatigue relieving method based on ambient light self-adaption and an AI algorithm, and relates to the technical field of visual health protection. The visual fatigue relieving method based on ambient light self-adaption and the AI algorithm comprises the following specific steps: S1, data acquisition: acquiring a user eye image sequence in real time through a high-frame-rate camera; and S2, parameter extraction: when the user uses the eye for the first time, testing the eyes by combining the adjustable light source with ambient light. Multi-dimensional features (such as eyeball movement, blinking mode, pupil function and the like) of eyes are collected in real time through a high-frame-rate camera, an individualized base line is established and a fatigue rate value is dynamically calculated in combination with data of an ambient light sensor, and conversion from passive response to active prevention is realized. Through a hierarchical intervention strategy (such as brightness adjustment, blue light control and forced rest), the visual load is remarkably reduced, the intervention efficiency is improved, and the problem of insufficient adjustment hysteresis and individual adaptability in the prior art is solved.

The invention relates to the technical field of lenses, in particular to a film for vision correction and a lens, and the film for vision correction is deposited on the surface of a lens substrate and comprises a refractive index matching layer, a refraction compensation layer, an out-of-focus prevention and control layer, a blue light interference prevention layer and a super-hydrophobic wear-resistant layer which are sequentially arranged from bottom to top; the refraction compensation layer covers in a full-aperture mode and forms an optical area used for refraction correction in a central area, and the film thickness of the refraction compensation layer is decreased progressively from the center to the edge; the defocusing prevention and control layer covers the peripheral annular area of the optical area and comprises an annular transition belt and a main body defocusing area extending outwards from the outer edge of the annular transition belt; the out-of-focus prevention and control layer is composed of a ZrO2-epoxy resin compound; the inner film thickness of the annular transition zone is linearly increased from inside to outside, the concentration of the ZrO2 nanoparticles is induced to gradually change through a radial electric field, a refractive index radial gradient is formed, the concentration of the ZrO2 nanoparticles in the main body defocusing zone is constant, and peripheral defocusing is maintained through secondary increase of the film thickness.

The invention relates to the technical field of PET optical films, and particularly discloses a high-light-transmittance blue-light-resistant PET optical film and a preparation method thereof, and the high-light-transmittance blue-light-resistant PET optical film is prepared from the following raw materials by weight: 70-85% of a polyethylene glycol terephthalate resin matrix; 3%-8% of a benzotriazole anti-blue light agent; 5%-12% of a silicon dioxide nano anti-reflection agent; 2%-6% of nano zinc oxide or nano cerium oxide; 1.5% to 4% of a polycarbodiimide cross-linking agent; 0.5%-3% of an anti-blocking agent; 0.4%-1.5% of an antioxidant; 0.4%-1.0% of an ultraviolet light absorber; the balance is a processing aid; the preparation method comprises the following steps: S1, pretreating the raw materials; s2, a mixing procedure; and S3, extruding and coating. The PET optical film provided by the invention has high optical properties of high light transmittance, blue light resistance and low haze, and has the advantages of high light transmittance and blue light blocking rate of the optical film and improvement of the application range of the optical film.

The invention relates to the technical field of semiconductor devices, in particular to a multiband light-emitting diode epitaxial structure and a preparation method thereof. The multiband light-emitting diode epitaxial structure sequentially comprises a substrate, a buffer layer, an N-type semiconductor layer, a low-temperature stress release layer, a multi-quantum well light-emitting layer, an electron blocking layer and a P-type semiconductor layer from bottom to top, the multi-quantum well light-emitting layer comprises four sub-layers, namely a first long-wave cyan light multi-quantum well layer, a second short-wave cyan light multi-quantum well layer, a third long-wave blue light multi-quantum well layer and a fourth short-wave blue light multi-quantum well layer which are sequentially stacked and grown from bottom to top, and the light-emitting wavelengths are sequentially decreased. Meanwhile, by combining the design of the sub-layers of the multiple quantum well light-emitting layers and through the synergistic effect of exciting light of all wave bands, the overall excitation efficiency can be improved, full-spectrum white light is output, the full-spectrum white light is closer to sunlight, the light-emitting efficiency is high, the color rendering property is good, the stability is better, and harm to human eyes is small.

The utility model discloses an LED mobile phone eye protection lamp, which comprises a shell and a mounting frame, a main control board and a rechargeable battery are arranged in the shell, end covers are arranged at two ends of the shell, a charging jack is arranged on the end cover at one side and electrically connected with the rechargeable battery, and an on-off key is arranged on the end cover at the other side and connected with the main control board; an LED lamp is further arranged on one side, facing the mobile phone screen, of the main control board, and a transparent photomask is installed at the corresponding position of the shell; and the LED lamp illuminates towards one side of the mobile phone screen through the transparent light cover. According to the utility model, the eye-protection lamp for auxiliary illumination is installed on the mobile phone, and the illumination light emitted by the eye-protection lamp is overlapped with the blue light of the mobile phone screen, thereby effectively reducing the harm of the blue light, reducing visual fatigue, protecting eyesight, being especially suitable for people who use the mobile phone for a long time, and improving the eye health.

The invention relates to the technical field of LED display, and discloses an LED display color calibration method, device and system. The method comprises the following steps: applying a reverse test voltage to LED pixels in an LED display panel in a display frame blanking period, and calculating a real-time junction temperature value and a service life state value of each LED pixel; discrete phase coding reconstruction is carried out on the original display driving signal to obtain a temperature self-adaptive driving compensation signal; a temperature-sensitive fluorescent composite material layer is arranged on a substrate layer of an LED display panel, and the temperature-sensitive fluorescent composite material layer is activated through blue light components emitted by LED pixels to obtain an optical passive compensation spectrum; dividing the LED display panel into a plurality of independent control areas and generating an inter-area cooperative compensation parameter set; and constructing a pixel-level point diffusion compensation function and performing spatial domain dynamic compensation to obtain an LED display output image after color calibration. According to the invention, the problem of non-uniform area caused by manufacturing batch difference of a large-size display screen is effectively solved.

Sleep-aiding eyewear that prevents light which inhibits melatonin production from reaching the eye is described. The eyewear that is the object of the present disclosure has improved visibility over other methods of cutting off melatonin-inhibiting wavelengths of light, which enables the user to perform tasks, such as reading and typing, uninhibited. This is achieved in some embodiments using a Bragg grating comprising multiple layers of alternating reflective index material as a surface coating on the lens. This may be combined with lens-tinting, or antireflective coatings, in the eyewear. Furthermore, transition lenses which block melatonin-shifting light when there is a suitable external stimulus, such as blue light from a light emitting diode, are described. The presently described filters are also useful for electronic displays and functional light-transmitting materials.

The utility model relates to an LCOS (Liquid Crystal On Silicon) projection device, which comprises a light source module capable of emitting red, green and blue light beams, a polarization filter and an imaging lens which are sequentially arranged along a projection light path, an LCOS chip capable of modulating the polarization state of incident light is arranged on a projection light path between the polarization filter and the imaging lens, and an imaging lens group capable of imaging the incident light onto the LCOS chip is arranged on a projection light path between the light source module and the polarization filter. And a polarization layer capable of transmitting P polarized light and reflecting S polarized light is arranged on the polarization filter. Compared with a polarizing prism applied to a traditional LCOS projection light path, the LCOS projection light path has the advantages that through the arrangement of the polarizing filter and the polarizing layer which is arranged on the polarizing filter and can transmit P polarized light and reflect S polarized light, the LCOS projection light path has higher polarization efficiency, stray light is reduced, and optical efficiency is improved.

The invention discloses a coated reflecting film based on an organic fluorescent coating and a preparation method of the coated reflecting film, tetra (4-aminophenyl) methane and tetra-(4-formyl-(1, 1-biphenyl)) ethylene are used as reaction monomers to prepare a novel topological structure [4 + 4] COF (3D-TPE-COF) with a tetraphenylethylene (TPE) unit, and the novel topological structure [4 + 4] COF (3D-TPE-COF) is used for preparing the reflective film based on the organic fluorescent coating. The covalent organic framework material 3D-TPE-COF is added into coating liquid as a fluorescent material to prepare a coating reflecting film based on an organic fluorescent coating, and the obtained reflecting film can convert high-energy blue light, so that the brightness of light emitted by a backlight module is higher and closer to white; meanwhile, the 3D-TPE-COF fluorescent material and the polymer particles can form hydrogen bonds in the coating liquid to avoid aggregation of the polymer particles, so that the wear resistance and scratch resistance of the coating reflecting film are improved.

The invention discloses a method and a device for quantitatively detecting active microorganisms in a solid / semi-solid sample, and belongs to the field of microorganism detection. According to the method, detection is carried out based on a PMA-qPCR method, influence factors of the stability of an experimental result are analyzed, and a stability analysis model is constructed; the stability analysis model is shown in the specification; wherein S is a comprehensive stability score, and the higher the S value is, the better the stability of the experiment result is; the weight coefficient is the weight coefficient of the ith influence factor; the performance function is the performance function of the ith influence factor; the influence factors comprise sample suspension dilution ratio, PMA dye concentration, dye incubation time, blue light irradiation time, blue light irradiation area and impurity particle size. The method can be used for simultaneously detecting the activity of various microorganisms in a solid / semi-solid sample, the accuracy is high, the experimental period is short, and the quantitative result has important guiding significance.

The invention relates to a Micro-LED full-color display device and a manufacturing method thereof. The display device comprises a driving substrate and first, second and third light-emitting component layers which are bonded in sequence to form a vertical stacked structure. The light-emitting component layers are electrically interconnected among layers through the through electrode group, the first active layer of the first light-emitting component layer is kept continuous, and the active region is prevented from being damaged by controlling the etching depth. The first, second and third light-emitting regions are respectively configured as red, green and blue light-emitting regions, the projection positions on the horizontal plane are staggered, and the area ratio is 2: 1: 1, so that the red light efficiency loss is compensated. The manufacturing method comprises the steps of forming the light-emitting component layers on the temporary substrate and sequentially bonding the light-emitting component layers, wherein when the first light-emitting structure is formed, etching is controlled to be stopped before reaching the first active layer. The method further comprises the processes of filling and planarization of an insulating layer, removal of a temporary substrate, formation of an optical isolation layer and electrode segmentation, and the performance and the manufacturing yield of the device are improved through structural innovation and process optimization.

The invention belongs to the technical field of medicines, and particularly relates to application of Comput-8 in preparation of a product for relieving or treating retina degeneration induced by blue light damage. It is found for the first time that Compond-8 has a protection effect on retina rod cells and cone cells induced by blue light damage, the cilia length, density and membrane disc thickness of the cone cells and the rod cells can be increased, the thickness of a retina outer nuclear layer can be increased, photoreceptor cell damage caused by blue light exposure can be remarkably improved, and the photoreceptor cell damage can be remarkably reduced. The retina degeneration caused by blue light injury can be relieved or treated, and a new thought and means are provided for treatment of the retina degeneration induced by the blue light injury.

A remote inspection vehicle for inspecting a plant for early drought stress and a neural network model for calculating a score corresponding to a level of early drought stress in the plant. The inspection vehicle may be equipped with an inspection camera having a radiometric infrared sensor and a red, green, and blue light sensor to capture plant images. Image data from the inspection vehicle, as well as soil moisture and calculated CWSI scores, can be used to train the neural network model, deriving weights and biases therefrom using a plurality of neural network layers. Using a plant canopy temperature value, a red raster value, a green raster value, a blue raster value, and a soil moisture value, the trained neural network model can generate a score which can be used to assess the level of early drought stress in a plant.

The invention discloses a method for ecologically controlling pests in a citrus orchard, which comprises the following steps of: preparing mint, salvia officinalis and ageratum conyzoides in a ratio of 1: 1: 1 in the middle of the citrus orchard to form a strip-shaped or chessboard-shaped layout with the coverage area of 30-50%, and synergistically repelling the pests and attracting natural enemies by utilizing plant volatile matters; the method specifically comprises the steps that an intercropping belt is arranged at the position 1 m away from citrus trees, the belt width is 2 m, and the plant row spacing is 30 cm * 40 cm; citrus field planting is conducted, transplanting is conducted in spring of the next year, organic fertilizer and regular pruning and covering (three times every year, soil covering is conducted after smashing, and wood vinegar is added) are combined; mint releases menthol, salvia officinalis releases eucalyptol to expel parasites, ageratum conyzoides attracts predatory mites to control red spiders, and mineral oil and a yellow sticky card are supplemented for prevention and control; aiming at facility cultivation, LED supplementary lighting (red light: blue light: white light = 3: 1: 1) and fan diffusion volatile matters are additionally arranged. The use of chemical pesticides is reduced by 40% or above, the pest population density is reduced by 50%-70%, meanwhile, the diversity of soil organic matter and microorganisms is improved, and the method is suitable for open-air and greenhouse citrus orchards.

The present invention relates to a method for increasing the content and molecular weight of aloe polysaccharides in aloe vera. The method comprises the following steps: firstly removing the blank part of the tip and tail of the aloe vera, retaining the aloe vera leaves, and cultivating the leaves with pure water; peeling and beating the aloe vera leaves to obtain aloe vera gel; placing the obtained aloe vera gel in a light irradiation reaction tank; setting an agitator at the tank mouth of the light irradiation reaction tank; placing a color-adjustable LED lamp above the light irradiation reaction tank, and subjecting the aloe vera gel to alternating light treatments of blue light, red light, and no light. The present invention successfully increases the content and molecular weight of aloe polysaccharides in aloe vera gel by using an external field such as a red and blue alternating light field. In addition, the application of appropriate light regulation can simulate the natural system and produce biological macromolecules (such as polysaccharides) by controlling the polymerization reaction through the external field. Since the high molecular weight and content of aloe polysaccharides are crucial to the biological activity of aloe polysaccharides, the present invention is of great significance to the development of the medicinal value of aloe polysaccharide products.

An illumination system is provided, having a handpiece with an illumination unit and a semiconductor lighting element which provides a radiation of essentially blue light in the wavelength between 400 nm and 500 nm, and a light guide unit connectable to the handpiece. The light guide unit includes a fiber-optic light guide rod, having a proximal end face and a distal end face, and a sleeve. The fiber-optic light guide rod is fixed in the sleeve by a first adhesive in a portion of the proximal end face. The light guide unit has a converter, for converting the radiation of a semiconductor lighting element in the operating state into a distal radiation of the fiber-optic light guide rod at its distal end face. The distal radiation in the operating state has essentially white and / or color-neutral light, or colored light, a wavelength in the visible spectral range.

The invention provides quantum dot aerogel, a quantum dot light-emitting device and a preparation method thereof, and the preparation method comprises the following steps: adding a silane coupling agent into quantum dots to form modified quantum dots with silanol groups on the surfaces; uniformly stirring a silicon dioxide precursor and absolute ethyl alcohol, slowly adding deionized water and a catalyst, and stirring to form silicon dioxide sol; adding the modified quantum dots into silicon dioxide sol to form a mixed solution; placing the mixed solution in a closed container, and standing to form gel; putting the gel into absolute ethyl alcohol for aging treatment; and carrying out supercritical drying treatment on the aged gel to obtain the quantum dot aerogel composite material. The light-emitting performance of the quantum dots and the heat insulation performance of the aerogel are perfectly combined, the high temperature resistance and blue light resistance of the quantum dot aerogel composite material film layer can be greatly improved, the preparation method is simple, and the application range of the quantum dots can be greatly widened.

The invention relates to a red fluorescent material excited by blue light, an LED device and fluorescent ceramic. The chemical formula of the red fluorescent material is La (2-x) MgNbO6.5: xEu < 3 + >, wherein x is more than or equal to 0.01 and less than or equal to 0.1. The preparation method comprises the following steps: weighing lanthanum oxide, magnesium oxide, niobium oxide and europium oxide raw materials according to a stoichiometric ratio, grinding and uniformly mixing; sintering the uniformly mixed powder in a muffle furnace at high temperature, and cooling to room temperature to obtain the red fluorescent material. Compared with the prior art, the novel oxide-based red fluorescent powder prepared by the invention can emit positive red light of which the central wavelength is 616nm under the excitation of 465nm blue light, and can be used for white light LED (Light Emitting Diode) luminescent devices and fluorescent ceramics.

The invention belongs to the technical field of OLEDs, and particularly relates to an organic composition for a double-light-emitting-layer blue light device and a double-light-emitting-layer blue light organic electroluminescent device comprising the organic composition. The organic composition comprises a first compound with a structural general formula shown as a formula I and a second compound with a structural general formula shown as a formula II, the first compound can be used as a host material of the first light-emitting layer, and the second compound can be used as a guest material of the first light-emitting layer; through cooperative use of the first compound and the second compound, the half-peak width can be narrowed, energy transmission between a subject and an object is improved, and the utilization rate of radiation luminescence of an object material is increased. Research finds that when the organic composition provided by the invention is used as a first light-emitting layer of a composite region in preparation of a double-light-emitting-layer blue light device, the color purity and the light-emitting efficiency of the organic light-emitting device can be effectively improved. I; iI

The invention discloses an organic light-emitting device which comprises a first electrode, a second electrode and an organic layer located between the first electrode and the second electrode, and the organic layer at least comprises a light-emitting layer and an electron transport layer structure. Wherein the light-emitting layer comprises a mixture of compounds shown in the following formula I and having different deuteration rates; and the structure of the electron transport layer comprises a compound shown in the following formula II. The service life of the blue light-emitting device can be remarkably prolonged by matching the structures of the light-emitting layer and the electron transport layer.

An original substrate structure is rearranged, a bonding pad comprises a bonding wire part and a die bonding part matched with the bonding wire part, the die bonding part comprises a common electrode part arranged in the center of a substrate and four die bonding sub-parts arranged in the circumferential direction of the common electrode part, and the die bonding sub-parts are used for bearing RGB chips. Wherein the arrangement mode of the RGB chips is changed into circumferential arrangement from linear arrangement, lamp bead abnormity caused by poor die bonding in the manufacturing process is reduced, meanwhile, each die bonding sub-part is electrically connected with the corresponding wire bonding part through a bonding wire, and the wire bonding parts and the common electrode parts are electrically connected with the corresponding pins, so that five pins exist on the back of the substrate, and the reliability of the substrate is improved. And finally, a bowl cup is fixedly arranged on the substrate and used for delineating any die bonding sub-part and the corresponding wire bonding part, the delineating die bonding sub-part is used for die bonding of the blue light chip, and the bowl cup is filled with white light packaging glue and used for displaying white light and improving the overall brightness of the lamp bead.

The invention discloses an indoor zero-blue-light healthy lighting system and method, and relates to the technical field of healthy lighting, and the method comprises the steps: firstly, determining lighting parameters and demands in combination with the vision of old people and a pension scene; zero blue light layered lighting hardware is constructed; integrating a plurality of sensors and a plurality of control functions to form an intelligent control module; then, self-adaptive illumination adjustment is achieved through multiple algorithms; and finally, applying the adjusted system to pension scene verification, and forming an adaptive scheme according to feedback fine tuning parameters. Through zero blue light layered lighting hardware and a multi-source perception fusion algorithm, the system adapts to the visual and behavior requirements of the elderly, adopts a pure LED light source to eliminate blue light hazards, achieves the cooperation of layered lighting and intelligent control, achieves the dynamic adjustment to meet precise lighting and reduce energy consumption, and also responds to the environment and behaviors in real time through various algorithms, maintains color temperature transition and zero blue light output, and achieves the intelligent control of the elderly. And the health value and experience are improved.

The invention discloses a multiband LED epitaxial structure and a preparation method thereof, and relates to the technical field of semiconductors. A multi-quantum well light-emitting layer of the multiband LED epitaxial structure comprises a first long-wave blue light multi-quantum well light-emitting layer, a second medium-wave blue light multi-quantum well light-emitting layer, a third short-wave blue light multi-quantum well light-emitting layer and a fourth short-wave blue light end quantum well light-emitting layer which are sequentially stacked. The LED chip manufactured through the epitaxial structure can emit light of three different wave bands including long-wave blue light, medium-wave blue light and short-wave blue light, the excitation light source with the blue light of the three wave bands excites the red-green mixed fluorescent powder layer, a full-spectrum white light LED light source can be generated, and compared with a blue light LED chip with only one wave band, the full-spectrum white light LED light source has the advantages that the light emitting efficiency is improved, and the light emitting efficiency is improved. The ratio of short-wave blue light below 450 nm is small, damage to human eye retina cells is small, and a healthy full-spectrum white light LED light source with a high color rendering index can be achieved.

A color conversion substrate includes: a base part in which a first light-transmitting area and a second light-transmitting area are defined; a first stack disposed on the base part and a second stack disposed on the first stack; a first wavelength conversion pattern overlapping the second light-transmitting area, and disposed on the second stack, where the first wavelength conversion pattern converts light of a first color into light of a second color; and a light-transmitting pattern overlapping the first light-transmitting area and disposed between the first stack and the second stack, where portions of the first stack and the second stack in the second light-transmitting area are in direct contact with each other to constitute a blue light reflective layer.

The invention relates to the technical field of traditional Chinese medicinal material planting, and discloses a dipsacus asperoids medicinal material photoperiod regulation and control yield-increasing planting method which comprises the following steps: selecting and preparing a planting site, selecting a land parcel with sufficient illumination, good drainage and fertile soil as a planting shed base, and deeply ploughing 30 days before planting; teasel root seedlings which are 15-20 cm in plant height, complete in root system and free of plant diseases and insect pests are selected for field planting, the field planting time is the middle ten days of April in spring or the last ten days of September in autumn, the field planting density is that the row spacing ranges from 50 cm to 60 cm, the plant spacing ranges from 30 cm to 40 cm, and root fixing water is thoroughly watered after field planting; a photoperiod regulation and control system is built, an LED plant growth lamp is adopted as a supplementary light source, a light source spectrum is configured to be a combination of red light and blue light wavelengths, the light intensity ratio is 3: 1, and illumination parameters are set according to the teasel root growth stage. The dipsacus asperoids medicinal material photoperiod regulation and control yield-increasing planting method aims to improve the yield and quality of the dipsacus asperoids medicinal material by regulating and controlling the photoperiod.