72results about How to "Uniform light source" patented technology

An optical manifold for efficiently combining a plurality of LED outputs into a single, substantially homogeneous output, in a small, cost-effective package. The optical manifolds can be used to combine multiple LEDs of the same color and provide a high intensity output aperture with very high uniformity and sharp borders, or they can be used to generate a multiwavelength output, such as red, green, and blue LEDs that are combined to generate white light. Embodiments are also disclosed that use a single or multiple LEDs and a remote phosphor and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. The optical manifolds are designed to alleviate substantial luminance inhomogeneities inherent to LEDs. The optical manifold utilizes principles of non-imaging optics to transform light and provide directed, substantially uniform light sources.

A novel light mixing plate and a direct backlight module using the light mixing plate are provided herein. The light mixing plate has a first surface and a second surface, in which a number of indented grooves are configured along the first surface to accommodate the LED light sources. The lights from the LEDs enter the light mixing plate via the side walls of the grooves and propagate an extended distance inside the light mixing plate so that they are fully mixed with each other into a uniform planar white light when leaving the light mixing plate via the second surface.

An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.

A light guide unit including a light guide plate and a scattering reflective unit is provided. The light guide plate has a first surface, a second surface opposite to the first surface, and a light incident surface connecting the first surface and the second surface. The light incident surface includes a first recess and a second recess arranged in a sequence from the first surface to the second surface. An average radius of curvature of the first recess is less than an average radius of curvature of the second recess. The scattering reflective unit is disposed on the second surface. A light source module is also provided.

A backlight module includes a light guide plate, micro-structures, at least one light source, and a first prism sheet. The light guide plate includes a first surface, a second surface, and a light incident surface connecting the first surface and the second surface. The micro-structures are disposed on at least one of the first surface and the second surface. The light source is disposed beside the light incident surface and capable of emitting a light beam. The first prism sheet includes a first transparent substrate and first prism structures. The first surface is located between the second surface and the first transparent substrate. The first transparent substrate is disposed among the first surface and the first prism structures. Each first prism structure has a first vertex angle protruding away from the first transparent substrate, and the first vertex angle falls within a range of 67 degrees to 83 degrees.

The present invention discloses a light-emitting diode and a method for manufacturing such a light-emitting diode with a direct band-gap III-V compound semiconductor material on a GaAs substrate. It is implemented by forming a first conductive electrode on the top edge of the epitaxial LED layer and a second conductive electrode opposite the first conductive electrode on the edge of a transparent substrate. Further, after the first conductive electrode and second conductive electrode are connected by chip bonding skill, it is selectively to remove the GaAs substrate and plate a transparent electrode on the top portion of the epitaxial LED layer. Therefore, when casting from P-N junction of the light-emitting diode, the light will go through with directions of the top portion of epitaxial layer and transparent substrate.

There is provided a light-transmitting resin plate for a liquid crystal display which has achieved conversion of a linear light source into a surface light source together with a higher luminance by minimizing the loss of the transmitted light due to a light-diffusing agent and forming a specific semi-elliptic convex lens shape on the light-exiting surface side. There is also provided a light-transmitting resin plate which can satisfy a long-term optical stability of a backlight as well as shape stability of the resin plate.

An image acquiring and transforming apparatus having a uniform light source is provided. The image acquiring and transforming apparatus includes a housing, a compensatory light source, an image acquiring unit and a light uniforming member. The light uniforming member is dome shaped. The dome shaped light uniforming member has an inner wall configured with a light reflective surface adapted for uniforming a light illuminated thereon. The compensatory light source is disposed inside the housing. The compensatory light source, the light uniforming member and the image acquiring unit are disposed in the housing in that order. When the compensatory light source projects a light onto the light uniforming member, the light is uniformly reflected to uniformly illuminate an object positioned at a predetermined position. In such a way, the image acquiring unit can clearly acquire the image of the object, and transform the acquired image into a digital file for saving.

The invention provides a light source assembly, a display device and a preparing method of a light source assembly. The light source assembly is characterized in that a carrier comprises two superposed film layers and a conductive layer between the two superposed film layers; the conductive layer comprises a plurality of pad patterns; the pad patterns are electrically connected through leads; onefilm layer is provided with a plurality of windows for exposing the pad patterns; LED chips are fixed on different pad patterns correspondingly through tin soldering; and the same fluorescent layer fills the clearances among the LED chips and covers all LED chips. Compared with a traditional backlight source, the light source assembly and the preparing method thereof according to the invention have advantages of ensuring high light emitting effect, realizing high flexibility and foldability of the light source assembly for matching preparation of a narrow-frame and even no-frame display device. Compared with an existing popular OLED screen, the display device according to the invention can realize a substitution plan with advantages of low cost, high yield and high popularization value forrealizing high screen-to-body ratio.

The invention discloses a calibration method of absolute response ratio of an infrared detector and a device thereof. By using the method of combining a blackbody origin and a narrow band pass filter, the absolute response ratio parameter of the detector under an appointed wavelength is acquired. According to the method, the blackbody origin is adopted as a calibration light source, so the stability of the uniformity of spatial output light spots is guaranteed; the placement positions of the detectors does not need to be precisely adjusted during calibration measurement, so the calibration efficiency and the precision of batch detectors are greatly improved; and meanwhile, power parameter of light irradiated onto the surfaces of the detectors is acquired through a theoretical calculation method, so errors in the power measurement of weak light signals are overcome. Through changing the wavelength parameter of the pass filter and the blackbody temperature, the method can be applied to parameter calibration of the detectors at various wavelengths, and the applicability is high.

A light-emitting device includes a bearing support, a light-emitting unit, a transparent packaging body and a fluorescent colloid layer. The light-emitting unit is arranged on the bearing support. The transparent packaging body covers the light-emitting unit, the outer side of the transparent packaging body has a dent, and the transparent packaging body has at least a reflecting face in the dent. The fluorescent colloid layer is covered outside the transparent packaging body, and forms an air chamber with the dent of the transparent packaging body. The reflecting face of the transparent packaging body guides the luminous ray generated by the light-emitting unit to one side wall of the fluorescent colloid layer.

An improved light beam combiner is disclosed that creates a more uniform light source across the UV, Visual, and NIR range. It is an optical mechanical device made up of a standard high low dielectric thin film which, when placed at a 45 degree angle between a Deuterium lamp and a Halogen or Tungsten lamp, reflects the UV portion of a Deuterium lamp and passes the visual portion while also allowing the visual energy of a Halogen or Tungsten lamp to pass resulting in a more uniform light source for use in spectroscopy.

A backlight module includes a lighting unit and a brightness enhancement sheet. The brightness enhancement sheet is disposed beside the lighting unit. The brightness enhancement sheet includes a light-transmissive substrate, a plurality of lenses, a reflective layer, and a diffusion layer. The light-transmissive substrate has a first surface and a second surface opposite to the first surface. The first surface is located between the second surface and the lighting unit. The lenses are disposed on the first surface. The reflective layer is disposed on the second surface. The reflective layer has a plurality of light-transmissive openings respectively located on the optical axes of the lenses. The diffusion layer is disposed on the reflective layer and covers the light-transmissive openings. The reflective layer is disposed between the diffusion layer and the second surface. A liquid crystal display apparatus is also provided.

An improved light beam combiner is disclosed that creates a more uniform light source across the UV, Visual, and NIR range. It is an optical mechanical device made up of a standard high low dielectric thin film which, when placed at a 45 degree angle between a Deuterium lamp and a Halogen or Tungsten lamp, reflects the UV portion of a Deuterium lamp and passes the visual portion while also allowing the visual energy of a Halogen or Tungsten lamp to pass resulting in a more uniform light source for use in spectroscopy.

The invention relates to the technical field of LEDs, in particular to a water-based light diffusion coating. The coating is prepared from 20-30 parts of water-based polyacrylic acid resin, 15-20 parts of high temperature resistance organic silicon resin, 5-15 parts of a light diffusion agent, 3-7 parts of an emulsifying agent, 1-1.5 parts of a defoaming agent, 2-7 parts of inorganic pigment, 3-5 parts of an active additive, 2-4 parts of a dispersing agent and 5-15 parts of a mixed solvent. According to the water-based light diffusion coating, the problems of LED lamp glare, light pollution and the like are solved, the light source is uniform, soft and full, the light permeability and light scattering performance are good, the cooling effect is good, and the service life is long.

The invention relates to a movable LED backlight device and used for providing backlight for a display screen. The movable LED backlight device comprises a motor, a rotating rod connected with the rotor of the motor, at least two annular conveyor belts parallel to each other and driven by the rotating rod to rotate, and at least one LED light bar bridged over the at least two annular conveyor belts; each LED light bar is provided with two opposite light exiting surfaces. The movable LED backlight device overcomes the problem of uneven light source of a large-area liquid crystal panel; compared with a down form, the number of LEDs is greatly reduced, the cost is reduced, and the electric energy consumption and the heating amount are reduced; compared with a side light form, a light guide plate is omitted so that the light source can be distributed more uniformly and the backlight of the large-area panel is effectively increased.

A backlight module includes a light guide plate, a reflecting unit, two light emitting units, and two light absorbing units. The light guide plate has a first surface, a second surface opposite to the first surface, and two light incident surfaces connecting the first surface and the second surface. The two light incident surfaces are respectively located at two adjacent corners of the light guide plate. The reflecting unit is disposed on the second surface. The two light emitting units are respectively disposed beside the two light incident surfaces. Light beams emitted by the two light emitting units are capable of entering the light guide plate respectively through the two light incident surfaces and being transmitted out of the light guide plate through the first surface. The light absorbing units are disposed between the second surface and the reflecting unit and are respectively adjacent to the two light incident surfaces.

A keypad assembly for a portable terminal according to the present invention includes: a keypad having pad portions with a plurality of key buttons placed thereon, light guide plates disposed between the pad portions, and reflection units disposed on the light guide plates to direct the light toward the key buttons; light sources for providing the light toward the reflection units; a plurality of spacers disposed below the light guide plates for separating the light guide plate from a substrate and for supporting the light guide plates; switches disposed below the pad portions under the key buttons for applying signal to the substrate; and a casing for enclosing the keypad.

A transmitting-type liquid crystal display projection system including a planar light source which emits planar white beam or planar R / G / B beams in succession is provided. A first polarization filter receives the planar light source and polarizes the same to be in a first polarization state. A liquid-crystal light valve receives the polarized planar light source, and converts the first polarization state to a second polarization state having a corresponding gray level. A second polarization filter receives a light output from the liquid crystal light valve to produce a second polarization light beam. A projection unit projects the second polarization light beam onto a display plane. Using the same planar light source, a polarization beam splitting (PBS) device with a refection-type liquid crystal light valve can be used to achieve the reflection-type projection system.

The invention relates to a method for preparing hydrogen, in particular to a method for preparing hydrogen by using photosynthetic bacteria. The method takes a light emitting diode (LED) as a light source to radiate the photosynthetic bacteria, so that the hydrogen is produced. An LED lamp is adopted to be taken as a photosynthetic bacteria hydrogen producing source, and an LED spectral band has the advantages of long service life, slow light decay, convenient installation and easy control, and can provide stable and even light source for the photosynthetic bacteria. Furthermore, as the LED is little in electric power consumption, the cost for producing hydrogen is saved. Compared with an electric incandescent lamp, the LED lamp with monochromatic source has remarkable promoting effect on increasing the hydrogen volume produced from the photosynthetic bacteria.

The invention relates to a projection-type high-power LED automobile dipped headlight which has the technical proposal that the lower part of a dipped headlight body (10) is provided with a circuit control module (9), the middle part thereof is provided with a light distribution forming board (5) and the top part thereof is provided with an optical lens (1), wherein, the optical lens (1) is fixed at the upper part of a lens mount (2), the light distribution forming board (5) is arranged at the lower end of the lens mount (2), a main reflection plane (4) is arranged at the bottom surface of the light distribution forming board (5), an auxiliary reflection plane (3) is positioned at the upper surface of the light distribution forming board, and an LED light source (6) is arranged above an auxiliary radiator (7). A method for manufacturing the projection-type high-power LED automobile dipped headlight comprises: 1) selection of the LED light source; 2) the optical lens preparation; 3) the light distribution forming board, the main reflection plane and the auxiliary reflection plane preparation; 4) the lens mount preparation; 5) the auxiliary radiator preparation; and 6) assembly. By adopting the invention, the light emitted by the LED light source is processed by secondary light distribution, so that the two problems of heat dissipation and light distribution can be solved. The LED automobile dipped headlight has high luminous efficiency, uniform and soft light source and prolonged service life by 4-5 times, thus being more beneficial for the road ahead lighting and high speed driving.

The invention relates to the technical field of LEDs, in particular to a water-based microbead light diffusion coating. The coating is prepared from 20-30 parts of water-based polyacrylic acid resin, 15-20 parts of high temperature resistance organic silicon resin, 5-15 parts of a light diffusion agent, 3-7 parts of an emulsifying agent, 1-1.5 parts of a defoaming agent, 2-7 parts of inorganic pigment, 3-5 parts of a thickening agent, 2-4 parts of a dispersing agent, 1-5 parts of a diffusion agent and 5-15 parts of a mixed solvent. According to the water-based microbead light diffusion coating, the problems of LED lamp glare, light pollution and the like are solved, the light source is uniform, soft and full, the light permeability and light scattering performance are good, the cooling effect is good, and the service life is long.

The invention provides an interactive semi-automatic grating surface defect detection device and a method using the device, and relates to a defect detection device and the method using the device. The problems that an existing grating surface defect detection device is low in detection precision, low in detection efficiency, poor in anti-interference performance and high in cost are solved. According to the detection device, a motion control cabinet, a grating surface unfolding unit and a first image collecting system unit are sequentially arranged on a detection worktable from left to right in parallel, and a second image collecting system unit and the first image collecting system unit are connected. The defect detection method has the advantages of being high in automation degree, high in detection precision and detection efficiency, high in objectivity and not prone to causing eyestrain. Alignment of the position of a grating to be detected is achieved by driving an electric two-dimensional translation table, and the alignment mode has the advantages of being high in objectivity, high in positioning precision and good in stability compared with manual alignment. The device and the method are used for interactive semi-automatic grating surface defect detection.

An inductive light-source module including a casing, a substrate, light sources, a circuit board, an infrared sensing device, a bi-incident lens and a control unit is provided. The substrate disposed in the casing includes a carrying surface facing a transparent portion of the casing. The light sources connected to the substrate are disposed on the carrying surface. The infrared sensing device is connected to the circuit board. The bi-incident lens disposed on the transparent portion is located on a light path of each light for scattering visible lights to pass through the transparent portion and transmit to the outside, and converging the infrared from the outside to the infrared sensing device. The control unit is coupled to the light sources and the infrared sensing device to drive the light sources to emit the visible lights according to a sensing signal generated by the infrared sensing device when sensing the infrared.

An improved structure of meter, comprising a casing, a circuit board provided in the casing and having a connecting unit for connecting to an external machine, a central processor provided on the circuit board for transmitting the signals among individual unit and machine, a display unit for displaying the condition of the external machine, a correcting memory unit for detecting and memorizing the signals from various machines, a driving control unit for saving the variations in signals from various machines, a monitoring unit for presetting an alarm value and producing an alarm signal, a wireless transmitting unit for receiving the signals transmitted from the wireless controller, and an illuminating unit connected to the central processor for corresponding to both ends of the meter ring and the display unit. With the above arrangement, the meter of the present invention can be adapted to various kinds of machines and instruments.

The invention relates to the technology of fishery breeding equipment, and aims to provide a fry counting device and method based on machine vision detection and tracking. The device comprises a camera device used for collecting and analyzing pictures or video data and a computer terminal, and a lens of the camera device is aligned with an observation cabin through which fries pass; the fry separation module, the observation cabin and the fish collection container are sequentially connected through water pipes, and the space between a conical funnel and an angle adjusting valve is divided into continuous spiral channels through an annular partition plate in the fry separation module. The device can automatically disperse fish fries, effectively avoids accumulation and adhesion of the fish fries, reduces the fish fry detection and tracking difficulty, and effectively guarantees the counting precision; meanwhile, the observation cabin isolates external light source interference, the bottom of the square tube is white, continuous shooting, detection, tracking and counting are achieved, and the counting efficiency is improved; by continuously detecting and tracking the fry, the influence of fry migration on the counting precision is eliminated, and the counting precision is effectively improved.