358results about How to "Good light distribution" patented technology

A vehicle headlight including a common light distribution unit and a variable light distribution unit and a headlight system including the headlight can form a common light distribution pattern and a variable light distribution pattern using the common and the variable light distribution units. The variable distribution unit can include a light source, a phosphor panel, a mirror reflecting/scanning light emitted from the light source onto the phosphor panel and a projector lens projecting the scanning light adjacent the common light distribution pattern. The headlight system can include a front sensor detecting a surrounding condition, and can control the common and the variable light distribution units to form an optimum light distribution pattern in accordance with surrounding conditions. Thus, the disclosed subject matter can provide a headlight system including a headlight that can form an optimum light distribution pattern in accordance with surrounding conditions and can have a simple structure.

A lighting device, comprising a light engine housing, a light engine comprising one or more solid state light emitters, a diffuser and an energy forwarding element which receives AC voltage and supplies power to the light engine. The light engine housing comprises an electrical connection region which is engageable with an electricity supply device. The light engine housing comprises a first compartment, in which the light engine is positioned and a second compartment. The light engine housing comprises a flange region. The first compartment has an opening which is covered by the diffuser. The lighting device can be mounted such the only elements which are visible from a room are the flange region, a front side of the diffuser and any portion of the first compartment which is between the opening and the open end of the light engine housing. The light engine housing can comprise heat-dissipating fins.

A semiconductor light source apparatus can adjust a color tone of white light. The semiconductor light source apparatus can include a phosphor wheel, a motor rotating the phosphor wheel, a light source and a moving module. The phosphor wheel can include at least one phosphor layer configured to emit excited light. The phosphor wheel can vary a mixing ration of white light that is created by light emitted from the light source and the light excited by the at least one phosphor layer in accordance with a position of the phosphor wheel emitted by the light source. The moving module that is connected to the motor can adjust the position of light emitted from the light source. Thus, the disclosed subject matter can provide a semiconductor light source apparatus that can adjust a color tone of white light and a lighting unit using the light source apparatus, which can be used for a projector, lamp, etc.

A lens diffusing light emitted from a light source includes a concave light-incident surface, a light guide portion, and a light-emitting surface. The light-incident surface includes a plane portion opposed to the light source and an optical function portion that is formed on the plane portion and one of scatters and diffuses the light. The light emitted from the light source enters the light-incident surface. The light that has entered the light-incident surface passes through the light guide portion. The light-emitting surface emits the light passed through the light guide portion.

A vehicle lamp including a projector headlight using an LED light source for a low beam can include a shade, an LED light source, an ellipsoidal reflector and a projector lens. Both a focus of the projector lens and a top edge of the shade can be located near a second focus of the reflector. The LED light source can be located near a first focus located below the second focus of the reflector. Therefore, light emitted from the LED light source can be effectively gathered near the focus of the projector lens via the reflector and can be projected via the projector lens with high light use-efficiency. The projector lens can include light dispersing portions or structures on an upside and downside thereof for reducing chromatic aberration. Thus, the lamp can project a favorable light distribution that can conform to light distribution standards for vehicle headlights and the like.

An enhanced light fixture containing a volumetric diffuser to control the spatial luminance uniformity and angular spread of light from the light fixture is disclosed. The volumetric diffuser provides increased spatial luminance uniformity and efficient control over the illuminance such that power reductions, reduced cost or reduced size may be achieved. The volumetric diffuser contains one or more regions of volumetric light scattering particles. The spread of illumination of light from a light emitting source can be efficiently controlled by using a thin, low cost, volumetric, diffuser to direct the light in the desired direction. This allows the reduction in number of light sources, a reduction in power requirements, or a more tailored illumination. When the volumetric diffuser is used in combination with a waveguide to extract light, the light is efficiently coupled out of the waveguide in a thin, planar surface. This transmissive diffuser can be coupled to a reflecting element such that the resulting combination is a light reflecting element with a desired light scattering profile.

A compact solar concentrator photovoltaic module assembly includes a plurality of rear contact solar cells configured in a matrix array on a substrate. The substrate is comprised of conductors laminated to an insulator sheet to form a receiver sheet. A lens sheet on which many lenses have been formed is disposed in a fixed spaced relation to the substrate and operates to focus sunlight onto the active surfaces of the PV cells. The overall thickness of the concentrator module is less than four inches thick. The receiver sheet may be assembled using standard, surface mount printed circuit board assembly techniques. The receiver sheet may have a secondary optical element and may also serve as part of the encapsulant for environmental protection.

A plurality of separate lead frames can be insert-molded in a reflector composed of a white resin having a high reflectivity to form a package for an LED device. A cavity is formed in the reflector. The cavity can have an inner circumferential surface that opens wider in an upward direction. Cups can be located in the cavity. Each cup has an outer wall that can be in the form of a cylinder with the bottom formed of each of two separate lead frames. A red LED chip and a green LED chip can be adhesively fixed to the lead frames located on the bottoms of the respective cups. The LED chips can have lower electrodes, which are electrically brought into conduction with the lead frames one by one. The LED chips can also have upper electrodes, which are electrically brought into conduction with the lead frames one by one via bonding wires. A light transmissive resin can be filled in the cavity.

A semiconductor light emitting device which includes at least one concave on a light extraction surface opposite to a surface on which a semiconductor stack comprising a light emitting layer between a n-type semiconductor layer and a p-type semiconductor layer is mounted. The concave has not less than two slopes each having a different slope angle in a direction that a diameter of the concave becomes narrower toward a bottom of the concave from an opening of the concave and a slope having a gentle slope angle is provided with irregularities and a slope having a steep slope angle is a flat surface.

The invention provides an intelligent ecological greenhouse system based on solar light supplement and geothermal insulation. The system comprises a greenhouse, a water accumulation and feed device, a fertilization device, a solar light condensation device, an optical fiber receiver, an optical fiber light splitter, a light supplement lamp, a solar photovoltaic generation device, a geothermal pump, hot water heat-radiating fins, a water curtain cooler, a CO2 generation device, a constant-flow ventilating window, a temperature sensing device, a humidity sensing device, a photosensitive sensor, a video monitor device, a CO2 sensing device, a rainwater collection pool, a storage battery, a power supply controller, an inverter, a control host, a monitor, a mains supply and the like, wherein electric power of a solar photovoltaic module and electric power of the mains supply are respectively supplied to the geothermal pump and the control host as well as a water feed pump and the light supplement lamp; and the control host respectively receives different signals of the temperature sensing device, the humidity sensing device, the photosensitive sensor and the CO2 sensing device to control respective terminal devices, respectively performs light supplement, temperature insulation, watering, fertilization and CO2 adjustment, and carries out remote monitoring at the same time.

A vehicle lamp is provided with a plurality of lamp units respectively including light sources, and optical units for emitting light from the light sources ahead of the lamp unit, and a driving unit configured to swivel the plurality of optical units in different strokes.

A light which can emit light continuously can be added to a cellular phone (1) while demands for reduction in size, weight, and thickness are being satisfied; by providing a cellular phone equipped with a camera (13) for taking a moving picture of a subject, with a lighting device (12) for illuminating a subject by means of a light-emitting diode, a switching device (21) for turning on a lighting device (12), a light distribution lens for condensing light radiated from the lighting device (12) toward the subject, and a transparent cover for protecting the light distribution lens on the subject side, which is the front side, of the lighting device (12).

An LED lens and a light emitting device using the same are disclosed. The LED lens comprises a light incident surface, a light emitting surface, and a bottom surface. The light emitting surface includes a first recession portion disposed at the central thereof and a protrusion portion connected to the outer periphery of the emitting recession portion. The light incident surface comprises a first optically active area and a second optically active area. The first optically active area is disposed at the central of the light incident surface, and has a second recession portion; the second optically active area is a concave surface connected to the first optically active area. The LED lens satisfies specific conditions. The LED lens distributes a light beam emitted from the light emitting device to form an even light pattern.

A projector headlight for a low beam can include a first and second lighting unit. Each of the first and second lighting units can include an LED light source, an ellipsoidal reflector, a projector lens and a shade. Light emitted from the LED light source can form a light distribution pattern from the projector lens via the ellipsoidal reflector by shielding an upwards portion of the light with the shade. The shade of the second lighting unit may be configured so as not to project light on a specific point under a cut-off line on an oncoming lane using a convex portion thereon. Therefore, the first lighting unit can project light with a maximum light intensity at the specific point so as to overlap the light distribution pattern formed by the second lighting unit. Thus, the projector headlight can perform a favorable light distribution pattern that can conform to a light distribution standard for headlights.

A semiconductor light emitting device having high reliability and excellent light distribution characteristics is provided. Specifically, a semiconductor light emitting device 1 is provided with an n-electrode 50, which is arranged on a light extraction surface on the side opposite to the surface whereupon a semiconductor stack 40 is mounted on a substrate 10. A plurality of convexes are arranged on a first convex region 80 and a second convex region 90 on the light extraction surface. The second convex region 90 adjoins to the interface between the n-electrode 50 and the semiconductor stack 40, between the first convex region 80 and the n-electrode 50. The base end of the first convex arranged in the first convex region 80 is positioned closer to alight emitting layer 42 than the interface between the n-electrode 50 and the semiconductor stack 40, and the base end of the second convex arranged in the second convex region 90 is positioned closer to the interface between the n-electrode 50 and the semiconductor stack 40 than the base end of the first convex.

A headlight controller, an optical unit and a vehicle headlight can include a headlight controller and an optical unit. The headlight controller can include a system controller and a camera photographing vehicles located in a forward direction thereof, and the system controller can be configured to output a control signal to provide various favorable light distribution patterns by using image data output from the camera in accordance with traffic conditions. The optical unit can be configured to emit beam lights each having a light-emitting angle using lights emitted from first and second white LEDs via a projector lens so that the beam lights can be used as a high and low beam without movable parts. Thus, the disclosed subject matter can include providing vehicle headlights that can form various favorable light distribution patterns by utilizing the characteristics of the controller and the optical unit in accordance with the traffic conditions.

An LED lighting unit, and a vehicle lamp using the LED lighting unit can have a favorable light distribution that can be perceived as a single, integrated lighting surface. The LED lighting unit can include a plurality of base boards, a plurality of LED light sources located on each mounting surface of the base boards, a plurality of parabolic reflectors and at least one V-shaped reflector configured to locate between the adjacent parabolic reflectors. Because each of the LED light sources is located substantially at each focus of the parabolic reflectors and the at least one V-shaped reflector, light emitted from the LED light sources can be illuminated as a single, integrated light via their reflectors. Thus, a vehicle lamp using the LED lighting unit can have a favorable light distribution that can be perceived as a single, integrated lighting surface and which can be used for a headlight, a tail lamp, etc.

A semiconductor light-emitting device and a method for manufacturing the same can include a wavelength converting layer encapsulating at least one semiconductor light-emitting chip in order to emit various colored lights including white light. The semiconductor light-emitting device can include a base board, a frame located on the base board, the chip mounted on the base board, the wavelength converting layer formed around the chip, a transparent plate located on the wavelength converting layer and a diffusing reflection member disposed between the frame and both side surfaces of the wavelength converting layer and the transparent plate. The device can be configured to improve the linearity of a boundary between the diffusing reflection member and both side surfaces by using the transparent plate, and therefore can be used for a headlight that can form a favorable horizontal cut-off line corresponding to the boundary via a projector lens without a shade.

A light emitting device includes a plurality of solid-state light emitting elements; a board on which the solid-state light emitting elements are arranged in the form of an array; and a light distribution adjusting member for adjusting a distribution of lights outputted from the solid-state light emitting elements. The light distribution adjusting member is provided to commonly cover at least two of the solid-state light emitting elements, and includes an accommodating portion which accommodates the solid-state light emitting elements; a concave curved surface portion provided above light output surfaces of the solid-state light emitting elements and immediately above the solid-state light emitting elements; and a pair of convex curved surface portions which are provided in opposite sides of the concave curved surface portion, each of the convex curved surface portions being smoothly connected to the concave curved surface portion.

A passive collimating tubular skylight consisting of a radiant energy-collecting aperture, a radiant energy-delivering aperture, and a radiant energy passageway between these two apertures, the passageway having a specularly reflective interior surface and a configuration to improve the collimation of the radiant energy passing therethrough. The skylight can be configured with the radiant energy-collecting aperture located above the roof of a building, oriented to collect sunlight; and equipped with a sealed weatherproof glazing, with the radiant energy-delivering aperture, or luminaire, located at ceiling level within the building, and equipped with a diffusing glazing; and with the reflective tubular light passageway constructed with a larger cross sectional area near the radiant energy-delivering aperture than near the radiant energy-collecting aperture. In complete accord with the second law of thermodynamics, and as proven by experimental results, the new passive collimating tubular skylight provides significant advantages over the prior art, including better solar energy collection, higher throughput optical efficiency, improved radiant energy collimation, enhanced interior illumination levels, and more precise positional control of the interior illumination.

A vehicle headlight can form a variable light distribution pattern with a simple structure including a favorable fail-safe. The headlight can include a movable mirror facing a light source unit, a static mirror between the movable mirror and the light source unit and a controller to emit light from the light source unit and to scan the light toward the static mirror using the movable mirror having a default position, where receives the light at a position substantially perpendicular thereto. The controller can enable the headlight to provide various light distribution patterns by varying a scanning method and the movable mirror is configured to return the light toward the light source unit even if it fails to operate properly. Thus, the disclosed subject matter can provide a vehicle headlight that can form various light distribution patterns in accordance with surroundings and can have the simple structure including the favorable fail-safe.