22 results about "Luminous flux" patented technology

The application relates to the technical field of LED lamp bead detection, and discloses an LED lamp bead light decay prediction method and system, which comprises the following steps: collecting the luminous flux, junction temperature and forward voltage of an LED lamp bead to obtain LED operation parameter data; performing first-order derivative and second-order derivative calculation on the LED operation parameter data to obtain parameter change rate data; performing composite threshold value detection on luminous flux drop events, temperature jump events and thermal resistance mutation events based on the parameter change rate data to obtain light decay event detection results; and generating lamp bead identification results including a thermal attenuation mode, an electromigration attenuation mode or a photochemical attenuation mode according to the light decay event detection results, in combination with carrier injection efficiency values, fluorescent powder quantum efficiency values and chip defect density values, the application drives physical parameter calculation and mode identification based on event detection results, realizes a technical transformation from passive response to active identification, and significantly improves the real-time performance and accuracy of LED light decay prediction.

The utility model discloses a kind of glass slits, which are divided into light-transmitting area (2) and non-light-transmitting area (1). The width of the light-transmitting area (2) is 15 or 30, and the light-transmitting area (2) is coated with an anti-reflection film with a transmittance of more than 96%. The non-light-transmitting area (1) is coated with an absorbing film with an absorption rate of more than 96%. The preparation method of the glass slit involves substrate processing, gluing, film coating, and peeling, etc. The light-transmitting area (2) of the glass slit has a transmittance of more than 96%, ensuring the luminous flux of the optical system. The non-light-transmitting area (1) uses an absorbing film, avoiding stray light introduced by multiple reflections of traditional chrome plating on optical lenses. The preparation method avoids the large size error of traditional laser cutting and the burr phenomenon of the slit, improving the production qualification rate of the slit and reducing the cost.

The utility model discloses a kind of determination device of carbonyl iron in coal-based methyl acetate, including ultraviolet light source controller, the ultraviolet light source controller is connected to multiple ultraviolet lamp light sources by signal line, ultraviolet light source controller can simultaneously adjust control wattage, wavelength and luminous flux of multiple ultraviolet lamp light sources;Ultraviolet lamp light source is used to irradiate high-transmittance analysis dish, and special coating mirror surface passes reaction image in high-transmittance analysis dish to high-speed camera, and high-speed camera is connected with computer image analysis system.The utility model can realize multiple sample parallel detection, with the characteristics of small error, accurate control.

The invention discloses a lighting module, a Fresnel lens design method and a display device. The lighting module comprises a substrate, a frame, a Fresnel lens and a light-emitting unit. The Fresnel lenses are installed on the frame and arranged on the light-emitting sides of the corresponding light-emitting units. Wherein the Fresnel lens comprises an incident surface and an emergent surface, and the emergent surface comprises a tooth surface which is provided with a central tooth and a plurality of concentric annular teeth; the tooth surface contours of the central tooth and the plurality of concentric annular teeth on the tooth surface are configured as follows: on the basis of an equal luminous flux principle, the incident light rays which come from the corresponding light emitting units and are emitted through the corresponding Fresnel lenses are divided, and the division comprises equal luminous flux division in a solid angle space; or performing equal luminous flux line angle division on different azimuth angles aiming at a target illumination area with a preset shape; and each divided part of luminous flux is guided to different parts of the target illumination area so as to realize uniform illumination. According to the embodiment of the invention, the illumination performance of the illumination module can be optimized.

The application discloses a kind of multi-lamp bead double light LED car headlamps, including lamp plate, reflector and glass lens.Reflector includes first reflector and the second reflector and third reflector of its far end, and the curvature radius of the reflecting surface of second reflector and third reflector is identical, and different from the curvature radius of the reflecting surface of first reflector, first, second and third lamp beads are respectively set on lamp plate with first, second and third reflector corresponding.The curvature radius of the reflecting surface of second reflector and third reflector is less than the curvature radius of the reflecting surface of first reflector.The application is by setting three-cup integrated reflector structure with different reflecting curvature radius, using different lamp beads to cooperate different reflector, improve far, near light light type uniformity and brightness, play good light supplement effect.It is also by setting angle limitation of second and third reflector, can obtain better light supplement light type and brightness, and avoid stray light, improve output luminous flux and light type uniformity.

This invention relates to the field of light-emitting diode (LED) technology and discloses a full-spectrum healthy lighting LED and its phosphor formulation method. The method includes: S1: measuring the spectral radiant flux and phosphor conversion parameters of a blue LED chip; S2: calculating the green, yellow, and red light fluxes based on the spectral radiant flux and phosphor conversion parameters, and setting formulation constraint parameters; S3: calculating the spectral proportion parameter based on a first mass proportion and generating a second mass proportion; S4: weighing and mixing green, yellow, and red phosphors according to the second mass proportion to obtain a mixed phosphor; S5: mixing the mixed phosphor with a silicone substrate and then dotting it onto the surface of the blue LED chip for curing to obtain an LED device. This invention realizes the calculation and control of green, yellow, and red light fluxes, solving the technical problem of spectral discontinuity in traditional single phosphor schemes.

A biological fluid information acquisition apparatus includes a light source, a prism, a first light receiving element, a second light receiving element, a differential circuit, and a signal processing unit. The prism has a first boundary face that branches a laser beam emitted from the light source into a first luminous flux and a second luminous flux, a second boundary face that totally reflects the second luminous flux, a third boundary face that totally reflects the second luminous flux reflected by the second boundary face, and a fourth boundary face emitting the second luminous flux reflected by the third boundary face, and, when a width direction of the biological fluid information acquisition apparatus is an X direction and a thickness direction of the biological fluid information acquisition apparatus orthogonal to the X direction is a Y direction, an interval between the second boundary face and the third boundary face in the Y direction is shorter than an interval between the first boundary face and the fourth boundary face in the X direction.

A projection display apparatus (50) irradiates an image modulation device with a luminous flux from a light source, and enlarges and projects an image formed on the image modulation device by using a projection lens. The projection display apparatus comprises: a detection unit (51) that detects the focal length of the projection lens; and a video processing unit (52) that sets the maximum display gradation of a display in the image modulation device to a reference value when the detected focal length is shorter than a threshold value, and sets the maximum display gradation of the display in the image modulation device to a limit value smaller than the reference value when the detected focal length is longer than the threshold value.

The present invention provides a semiconductor light-emitting device and a semiconductor light-emitting module that exhibit improved luminous flux and brightness, and suppressed angular dependence of chromaticity. [Solution] The device comprises a semiconductor light-emitting element 11, a wavelength conversion member 15 bonded to the upper surface of the semiconductor light-emitting element by a translucent adhesive layer 13, and a translucent coating layer 17 provided on the upper surface of the wavelength conversion member, having a refractive index between the refractive index of the wavelength conversion member and the refractive index of the air layer. The translucent coating layer is either a glass coating layer with a surface roughness in the range of 0.1 to 0.4 μm, or a nanoparticle sintered body coating layer.

The vehicle light-emitting device and a vehicle lamp are provided, emitting red light that can be distinguished from yellow-orange light even by a person with color vision deficiency, and emitting light with a high luminous flux. The vehicle light-emitting device comprises: a light-emitting element and a phosphor that emits light when excited by the light emitted by the light-emitting element.The vehicle light emission device emits light in an area within a chromaticity diagram of a CIE 1931 color system, wherein an area located in chromaticity coordinates below a confusion color line passing through a confusion color center and a first point representing a chromaticity point that meets a requirement for yellow-orange in an ECE standard, and an area R1 contained within an area R that meets a requirement for red in the ECE standard, overlap, wherein area R1 is defined by a first straight line up to a fourth straight line, which includes a first r-point (x = 0.6450, y = 0.3350), a second r-point (x = 0.6508, y = 0.3350), a third r-point (x = 0.7337, y = 0.2645), and a fourth r-point. (x= 0.7210, y= 0.2590) connects.

The application belongs to the technical field of photoelectric testing, and discloses a testing and sorting device with an LED placed inside an integrating sphere, which comprises a material moving assembly, a material feeding station, a centering station, a testing station and a material discharging station. The centering station comprises a mechanical centering assembly, which comprises a centering mold and a centering mold driving member. The centering mold is used for clamping the material to be tested, and the centering mold driving member is used for driving the centering mold to move so as to center the material to be tested on the carrier. The testing station is used for measuring the energized test data of the material to be tested, and comprises an integrating sphere, a probe base and a jacking assembly. The probe base is arranged inside the integrating sphere, and comprises a probe. The jacking assembly is used for pushing the carrier to move upwards so that the material to be tested enters the inside of the integrating sphere and abuts against the probe. The material discharging station is used for sorting the tested material from the carrier according to the energized test data. The application realizes effective collection and stable measurement of full-angle light parameters of side-emitting products, and significantly improves the testing accuracy and repeatability of key indicators such as luminous flux and light intensity distribution.

System for visualizing objects, comprising a light source with a polarizing filter for generating a polarized luminous flux and an observation device with a polarizing filter, wherein the polarizing filters are aligned relative to each other in such a way as to suppress reflected light and increase the contrast of the observed object.

This invention discloses a method for estimating the luminous flux decay state of luminaire networks of different ages and for compensating for the uniformity of illuminance in group control systems, belonging to the field of smart city road lighting control technology. Addressing the problem of uneven road surface illuminance caused by multiple batches of LED streetlights coexisting in the same group control network and uniform dimming during phased urban road renovations, this invention utilizes only the inherent electrical monitoring data of the driver. It extracts the aging positive voltage drift through temperature-aging decoupling and maps it to an estimated luminous flux maintenance rate. Combined with the road surface illuminance contribution matrix, it solves for the differential compensation dimming increment. Through mutual calibration using adjacent pole power consumption statistics, it achieves sensorless self-calibration closed-loop, supports rolling expansion of phased renovation scenarios, and ensures that the uniformity of road surface illuminance continuously meets design requirements.

This application discloses a display panel and a display device. The display panel includes a light-emitting layer and at least one light-shielding layer. The light-emitting layer includes a plurality of privacy-protecting light-emitting portions. The light-shielding layer is disposed on the light-emitting side of the light-emitting layer and includes a plurality of light-shielding portions. The orthographic projection of the light-shielding portion on a reference plane surrounds the orthographic projection of the corresponding privacy-protecting light-emitting portion on the reference plane. By ensuring that the minimum distance between one of the plurality of sensor openings and the orthographic projection of the nearest light-shielding portion on the reference plane is not equal to the minimum distance between at least another sensor opening and the orthographic projection of the nearest light-shielding portion on the reference plane, the two sensor openings can form complementary sensing areas at a wide viewing angle, eliminating the sensing blind zone of a single uniformly arranged sensor opening scheme at a wide viewing angle, thereby improving the overall luminous flux of the display panel over a wide angle range.

This application discloses a vehicle lamp assembly and a lighting system. The vehicle lamp assembly includes a base, a light-transmitting element, a fluorescent element, a reflector, and a light-blocking element. The base is used to connect a laser module, and the light-transmitting element is connected to the base. The fluorescent element is disposed on the side of the base facing the light-transmitting element and is located in the optical path of the designated laser; the fluorescent element is used to generate a designated fluorescence under the excitation of the designated laser, and the designated fluorescence is emitted to the outside through the light-transmitting element. The reflector is disposed in the optical path of the designated laser and is used to reflect the designated laser to the fluorescent element. The light-blocking element is disposed on the side of the reflector away from the base and is located on the optical axis corresponding to the designated laser incident on the reflector; the light-blocking element is used to block the designated laser. Since the vehicle lamp assembly uses a laser as the lighting source, the laser has a smaller spread and greater brightness. Under the premise of ensuring sufficient luminous flux, the size of the optical elements in the vehicle lamp assembly can be reduced, which is beneficial for achieving a miniaturized and high-brightness lighting design for the vehicle lamp assembly.

The light emitting device includes a light emitting element having a dominant wavelength in a range of 430 nm or more and 500 nm or less, and a fluorescent material that is excited by light emitted from the light emitting element and has a light emission peak wavelength in a range of 507 nm or more and 660 nm or less, wherein the light emitting device emits light having a dominant wavelength in a range of 490 nm or more and 500 nm or less, wherein the light emitting device has an S / P ratio, which is the ratio of a luminous flux in photopic vision to a luminous flux in scotopic vision, being 6.5 or less, and wherein the light emitting device has a light emission intensity in the light emission peak wavelength of the light emitting element that is greater than that in the light emission peak wavelength of the fluorescent material.

The objective is to provide a vehicle lighting device and vehicle luminaire that can achieve higher luminous flux and improved yield. [Solution] The vehicle lighting device according to the embodiment comprises: a socket; a substrate provided on one end side of the socket; a chip-shaped light-emitting element provided on a first surface of the substrate opposite to the socket side; a frame-shaped frame portion surrounding the light-emitting element; and a plate-shaped covering portion located inside the frame portion when viewed from a direction along the central axis of the vehicle lighting device. The reflectance of the frame portion and the covering portion to light emitted from the light-emitting element is higher than the reflectance of the first surface of the substrate. The covering portion has a hole for exposing the light-emitting element.

The present invention provides a lighting device that can secure the necessary luminous flux for illumination within a limited substrate area while setting a steep cut-off line above the direction of maximum brightness of the illumination light. [Solution] The lighting device 1 comprises a plurality of light-emitting elements 21a and a plurality of lenses 261. The plurality of lenses 261 include a first lens 263 and a second lens 264. The first lens 263 corresponds to the first light-emitting element 21c and emits light upward from the first direction of maximum brightness. The second lens 264 corresponds to the second light-emitting element 21d and emits light downward from the first direction of maximum brightness. The first ratio is greater than the second ratio. The first ratio is the ratio of the height L10 of the first lens 263 to the first light-emitting area H10 of the first light-emitting element 21c. The second ratio is the ratio of the height L11 of the second lens 264 to the second light-emitting area H11 of the second light-emitting element 21d. The first light-emitting area H10 of the first light-emitting element 21c is smaller than the second light-emitting area H11 of the second light-emitting element 21d.