145results about How to "Uniform spot" patented technology

The invention relates to a dedicated wide-angle light-distribution lens for LEDs (light-emitting diode). The lens is a rotating body, which comprises an incident plane and an exit plane, wherein a concave pit with the inner curved surface thereof being a rotary surface formed by rotating a smooth curve is arranged on the incident plane of the LED lens, the top part of the curved surface is in smooth transition and the LED is arranged in the concave pit; the exit plane is particularly a rotary surface in smooth transition; and the center of the LED lens is particularly a concave plane gradually bulging in outward transition and bending downwards at the edge. The invention solves the problem of light spots in LED illumination and achieves the application of illumination-grade high-power LEDs as light sources in the illumination of even surfaces; and the invention ensures the stable LED single-lamp performance, reduces the number of the LED single-lamp and ensures the long service life and good reliability of the system.

The invention relates to an LED supplementary lighting and image clipping evaluation system in standard image acquisition device, comprising an LED light source (101), a 1-120 VDC (Voltage-to-Digital Converter) power supply (102), a control circuit board (103), an image acquisition system (105), an LED light source switch (106), and an LED light source controller (301); the LED light source (101)is connected with the control circuit board (103) via an analog circuit, a digital circuit or an integrated circuit; the LED light source (101) is connected with the 1-120 VDC power supply (102) via the analog circuit, the digital circuit or the integrated circuit; the control circuit board (103) is connected with the image acquisition system (105) via the analog circuit, the digital circuit or the integrated circuit; and the technology of the invention is applicable to the public security image acquisition system, and improves the operation efficiency and image quality.

The invention discloses a color-temperature-adjustable COB packaging structure and a packaging method thereof. The color-temperature-adjustable COB packaging structure comprises a packaging substrate, CSP chip scale packaging devices, LED chips and a florescent glue sealing layer. The CSP chip scale packaging devices and the LED chips are fixed on the packaging substrate and wrapped by the florescent glue sealing layer. The florescent glue sealing layer is internally provided with at least one CSP chip scale packaging device and the LED chip, wherein the CSP chip scale packaging devices comprise chips and florescent glue wrapping the chips. The florescent glue and the florescent glue sealing layer are different in phosphor concentration. Light emitted by the CSP chip scale packaging devices and the LED chips passes through different numbers of phosphor powder particles and then color of different color temperature is obtained. The effect of color temperature adjustment can be achieved by controlling driving current in the CSP chip scale packaging devices and the LED chips.

The invention discloses a deep ultraviolet optics wave aberration detection apparatus and method; the apparatus comprises a quasi-molecular laser (1), an energy controller (2), a plano-concave cylindrical lens (3), a plano-convex cylindrical lens (4), a beam splitter (5), an energy detector (6), a first plane reflector (7), a diffractive optical element (8), a Fourier lens (9), a first collimating objective (10), a first 1/4 wave plate (11), a first 1/2 wave plate (12), a second plane reflector (13), a first focusing objective (14), an orifice plate (15), a second collimating objective (16), a second 1/2 wave plate (17), a polarizing splitting prism (18), a second 1/4 wave plate (19), a second focusing objective (20), a deep ultraviolet optical system (21) to be detected, a spherical reflector (22), a first relay lens (23), a second relay lens (24) and a Shack-Hartmann wavefront sensor (25). The deep ultraviolet optics wave aberration detection apparatus and method provide high-speed high-precision detection of system wave aberrations in integrated assembly and adjustment of deep ultraviolet optics.

The invention discloses an LED fluorescent glue that improves the uniformity of light emission. In parts by weight, the fluorescent glue consists of 1 part of packaging glue, 0.01-1 part of fluorescent powder, 0.01-0.1 part of silica-based inorganic nanoparticles, 0.01 part of ‑1 part silicone granules. Inorganic nanomaterials and silicone particles are mixed in the encapsulation glue, which reduces the sedimentation rate of the phosphor in the encapsulation glue, improves the uniformity of the phosphor distribution in the colloid, makes the white light spot more uniform, and improves the light diffusivity and transmittance. The light rate is maximized, and by changing the propagation path of the light, the light of various wavelengths is more fully mixed, and the spatial color uniformity of the light is further improved. It also provides an LED packaging method and LED that improve the uniformity of light emission, which improves the consistency of products, reduces the probability of uneven color distribution in space due to uneven distribution of phosphor powder, and improves product yield and product production. efficiency.

The invention is suitable for the field of lighting, and provides a spot lamp reflector, a spot lamp and a head lamp. The inner surface of the spot lamp reflector is of a paraboloid; the focal length of the paraboloid is between 2.4 and 2.6 mm; the focal point of the paraboloid is a luminous point of a light source; and the optical axis of the light source is overlapped with the central axis of a reflector. The inner surface of the spot lamp reflector is designed as the paraboloid of which the focal length is between 2.4 and 2.6mm; the focal point of the paraboloid is the luminous point of the light source; the optical axis of the light source is overlapped with the central axis of the reflector; and light spots formed by the light which is emitted from the light source and is emitted in parallel after being reflected by the reflector have the characteristics of uniformity, small radiant angle and perfect spotlight effect, so the spot lamp reflector can particularly serve as the reflector of the head lamp.

The invention discloses a high-power LED light fitting, which has excellent heat radiating effect, wide irradiation range, even faculae and smooth transition. The high-power LED light fitting comprises a metal shell (1), an LED light source assembly (2), a transparent protection cover (3) and a reflecting cover (4), wherein the front side of the shell (1) is provided with a light source accommodating cavity (13), the LED light source assembly (2) and the reflecting cover (4) are arranged in the light source accommodating cavity (13), the back side of the shell (1) is provided with a plurality of heat radiating sticks (11) arranged in arrays, the LED light source assembly (2) comprises a plurality of high-power LEDs (21) and a circuit radiating bottom plate (22), a horizontal plane (100) and at least one level inclined planes symmetrically distributed along two sides of the horizontal plane (100) are arranged in the light source accommodating cavity (13), and the circuit radiating bottom plate (22) is contacted and is fixedly connected with the inclined planes and transmits the heat generated by the high-power LEDs (21) to the shell, so that the heat is radiated by the heat radiating sticks (11). The high-power LED light fitting can be widely applied in the field of LED light fittings.

The invention discloses an LED automobile dipped headlight of a multiple reflection structure. The LED automobile dipped headlight comprises a light source, an ellipsoidal reflection mirror, a first parabolic reflection mirror and a second parabolic reflection mirror, wherein the normal direction of the light-emitting surface of the light source faces a projection area; the ellipsoidal reflection mirror is obliquely located above the light source; the first parabolic reflection mirror is located below the light source; and the second parabolic reflection mirror is located below the first parabolic reflection mirror. The ellipsoidal reflection mirror comprises an ellipsoidal first focus and an ellipsoidal second focus. The focus of the first parabolic reflection mirror is overlapped with the first focus of the ellipsoidal reflection mirror. The focus of the second parabolic reflection mirror is overlapped with the second focus of the ellipsoidal reflection mirror. A light and shade cut-off structure which can enable a projected light ray to form a light spot with a light and shade cut-off line is formed at the bottom of the ellipsoidal reflection mirror. Through a system composed of the ellipsoidal reflection mirror, the first parabolic reflection mirror and the second parabolic reflection mirror, the projected light spot has the clear light and shade cut-off line; and the ellipsoidal reflection mirror not only serves as a reflection mirror but also serves as a baffle plate, so that the light energy utilization rate is greatly increased.

The invention provides a preparation method of a white light chip. The preparation method comprises the steps of placing a fluorescent membrane on a support substrate; dispensing transparent silica gel on the surface of the fluorescent thin film according to a preset rule; placing an inverted blue-ray LED chip on the surface of the transparent silica gel and solidifying; cutting the fluorescent membrane along a cutting path; filling high-reflection glue between every two adjacent LED chips and solidifying; cutting along the grooves between the adjacent LED chips to obtain a single white lightchip. The white light emitted by the white light LED chip is uniform in color, the phenomenon of blue light leakage is avoided, the light emitting efficiency is high, and the light emitting angle is small.

The invention discloses an LED blackboard lamp. The LED blackboard lamp comprises an LED lamp frame arranged on the inclined upper portion. An LED lamp bar is fixed at the bottom of the LED lamp frame and comprises a plurality of LED lamp beads which are covered with a lens. A concave portion is opened in the lens, the LED lamp beads are arranged in the concave portion, and the depth of the concave portion is reduced gradually from one side away from the blackboard to one side close to the blackboard. The lens converts uniformly scattered light into large-angle polarized distributed light, so that light projected from the concave portion is distributed from low light to high light from the top to the bottom on the blackboard surface, and the defect of attenuated illuminance of the blackboard surface from the top to the bottom caused by the fact that traditional blackboard lamps are close to the top of the blackboard and far from the bottom of the blackboard is offset; meanwhile, by means of the large-angle light distribution on the blackboard surface from the left to the right, the illuminance uniformity of the blackboard length direction is guaranteed, the LED blackboard lamp light utilization rate is improved, and glare is reduced effectively.

The invention provides an LED lamp bead preparation method which comprises the following steps: S10, LED chips are regularly arranged on the surface of a substrate, and the light-emitting side surfaces of the LED chips face upwards; S20, silica gel is dispensed on the surfaces of the light-emitting sides of the LED chips; S30, fluorescent films cut into a preset size are sequentially attached to the surfaces of the LED chips to cover the light-emitting surfaces of the LED chips, and triangle-like silica gel layers are formed on the connecting interfaces of the fluorescent films and the LED chips; S40, high-reflection white glue fills the gaps between the LED chips until the high-reflection white glue is flush with the fluorescent films in height; and S50, cutting is carried out according to the cutting channels between the LED chips to obtain single LED lamp beads. Fluorescent powder covers the surfaces of the light-emitting sides of the LED chips in a film pasting mode, the light-emitting uniformity of LED lamp beads is improved, and the prepared LED lamp beads are uniform in light spot. The triangle-like silica gel layers are formed on the connection interfaces of the fluorescentfilms and the LED chips, so that the brightness of the LED lamp beads is greatly improved.

The invention relates to a novel LED fluorescent powder coating process, which comprises the following steps: covering an LED wafer with an osmosis membrane; and applying the mixture solution of silica gel or epoxy resin and fluorescent powder on the LED wafer through osmosis effect of the osmosis membrane and deposition of the fluorescent powder. The process can ensure that the fluorescent powder mixture solution is directly cured on the LED wafer according to the size of the LED wafer while not being influenced by the size of a bracket opening, thereby uniformly applying the fluorescent powder mixture on the LED waver to prevent the occurrence of blue or yellow blocks or rings in the optical spots or color of light emitted by the LED lamp. In addition, the mixture of silica gel or epoxy resin and fluorescent powder has small thickness, which can enhance the light intensity of the LED.

The invention provides a light-emitting device which is characterized by comprising a first laser light source, a polarization beam splitter, a first wave plate, a first light condensation element, ascattering device, a second light condensation element, a first wavelength conversion device, a dichroscope, a third color light generation part and a light condensation part. The light-emitting device provided by the invention has the advantages of high brightness, small optical expansion amount, high color rendering index, uniform light spots, long service life, high efficiency and the like. Thelight-emitting device can be applied to systems requiring high illumination intensity and small optical expansion, such as entertainment lighting systems, projection systems, automobile lighting systems, medical lighting systems, searchlighting lighting systems, field operation lighting systems, navigation lighting systems, portable lighting systems and the like.

The invention provides a white LED chip comprising a metal electrode, a flip-chip blue LED chip, a transparent silica gel, a high anti-adhesive and a fluorescent film, wherein the metal electrode is disposed on the surface of the electrode pad in the LED chip; the fluorescent film is provided on the upper surface of the LED chip with the area larger than the surface area of the LED chip and is symmetrically disposed along the center of the LED chip, and the fluorescent film is doped with titanium dioxide powder having a mass ratio of 0.5 to 5%; the transparent silica gel is arranged in an arcshape around the LED chip on the surface of the fluorescent film facing the fluorescent film; the high anti-adhesive is disposed around the LED chip along the surface of the transparent silica gel anddoes not exceed the metal electrode on the surface of the LED chip. In the white LED chip, the color uniformity of the white LED chip is better while reducing the difference between the color temperature of the center point of the white LED chip and the average color temperature.

The invention discloses a high-power line laser system. The high-power line laser system comprises a shell and a laser module arranged in the shell, the laser module comprises a laser module box body and a laser body arranged in the laser module box body, the laser body comprises a seat body, steps arrayed in sequence are arranged at the upper head face of the seat body, each step is provided with a laser and a lens bracket, the lens bracket is provided with a fast axis compression lens and a slow axis compression lens, the fast axis compression lenses, slow axis compression lenses and lasers are located on the same straight line, one end of the laser module box body is connected with a power supply module while the other end is connected with a cylindrical mirror bracket, a cylindrical mirror is arranged in the cylindrical mirror bracket, the end of the cylindrical mirror not connected with the laser module box body is connected with an adjusting bracket, the adjusting bracket is provided with a Powell prism bracket, and a Powell prism is arranged in the Powell prism bracket. The high-power line laser system is high in power and high in brightness, and the light spots are uniform and stable.

The present invention discloses one kind of light source device for slit lamp microscope. The light source device contains a lighter, and condensing lens set, slit, diaphragm and projecting lens set in the light path of the lighter. The lighter is one multiple die LED with red light emitting LED die, blue light emitting LED die and green light emitting LED die. The light source device has simple structure, convenient operation, rich light colors, high light homogeneity and high color stability, and can result in improved diagnosis quality.