372results about How to "Uniform illumination" patented technology

The systems and methods disclosed herein relate to sources of diffuse illumination for providing substantially uniform illumination to a surface. The diffuse illumination arises from varying the diffusion angle of light generated by an LED system. To vary the diffusion angle, a translucent member is placed between the LED system and the surface. Light emitted from the LED system across the translucent member can subsequently can uniformly cover the surface.

The present invention relates to an LED lamp in which, because the lamp has therein a heat dissipation transfer member and the power source base thereof is made of materials including polycarbonate, etc. with a high emission rate of radiation so as to enhance its surface heat dissipation constant, the power source base has sufficient heat dissipation performance and, thus, a separate insulation circuit is not necessary, thereby improving reliability and productivity of the lamp as well as reducing the cost of manufacturing.

To this end, the present invention provides an LED lamp comprising one or more LEDs mounted on a PCB, a floodlight cover that transmits light from the LEDs, and a power source base coupled to the floodlight cover and having a terminal at one end thereof, wherein the power source base is made of an insulation material; and the LED lamp also comprises a heat dissipation transfer member that has a heat sink in contact with the PCB on which the LEDs are mounted, and is formed and installed so as to overlap with and be in tight contact with the inner face of either the power source base or the floodlight cover or both.

The invention relates to a lens for LED street lamp. A concave pit is provided in the middle of a first side face of the lens and allowing LED to be arranged therein, and the pit wall of the concave pit forms an incident face; an arcing bulge in the middle of a second side face of the lens forms an emergent face with the shape of pillow; and a totally reflecting face is circumferentially provided around the concave pit on the first side face of the lens. The invention also relates to a LED street lamp, which comprises a frame, and a lighting module arranged on the frame, wherein the lighting module comprises a thermal radiator, a substrate with a LED array, a PCB board with a through-hole array and a lens cap with a lens array. The substrate is provided on the undersurface of the thermal radiator, PCB board is provided on the outer surface of the substrate and connected with each LCD electrode, the lens cap is provided at the outer side of the PCB board, LEDs pass through the through-holes on the PCB board to be accommodated in the concave pit corresponding to the lens, and the lens array is formed by arranging and combining a plurality of above mentioned lenses. The invention can control the distribution of light to form rectangular light spot. The light in the effective illuminated zone is very uniform and there is no parasitic light outside the zone.

A lens is provided for use with a solid-state light-emitting device, typically a light-emitting diode. The lens may be used in luminaries for roadway lighting and other applications. In one embodiment the lens includes a conical structure proximate the light-emitting source of the light-emitting device.

The invention relates to an eyepiece, in particular to an eyepiece used in a head-mounted display, belonging to the field of optical technique. The eyepiece is formed by six pieces of lenses, and a lens screen, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the observing side of human eyes and the display device side along the direction of an optic axis in a coaxial way; the exit pupil diameter of the eyepiece is larger than that of the common eyepiece, the eye relief is long, the angle of view field is large, and the focal distance and F/# are small; furthermore, illuminance of image plane is evener, so that the eyepiece especially meets the requirements of the head-mounted display.

A lighting device includes a substrate, a LED element, and a lens. A light exit surface of the lens includes a first light exit surface and a second light exit surface. A curve obtained by cutting the light exit surface by a plane including the optical axis has, on a boundary between the first light exit surface and the second light exit surface, a change point at which a rate of inclination decreases discontinuously. An angle between the optical axis and a line segment connecting the change point and a light emission center of the LED element is approximately equal to an emission angle with the highest light intensity, among emission angles, when light rays emitted from the light exit surface are sorted by respective emission angles.

A lamp comprises: a thermally conductive body; a plurality of LEDs configured as an array and mounted in thermal communication with the body and a light reflective hood located in front of the plane of light emitting diodes. The hood has at least two frustoconical light reflective surfaces that surround the array of LEDs and are configured such that in operation light emitted by the lamp is within a selected emission angle (beam spread). The hood is configured such that in operation a variation in illuminance (luminous flux per unit area incident on a surface) is 10% or less over approximately a third to one half of the selected emission angle.

The invention provides an automobile crossbeam assembly hole visual on-line measurement system and a method thereof. The system comprises a main control platform, a servo motor, a servo motor encoder, a slide platform, a slide block, a horizontal slide rail, a fixed high and low frame, a camera and a measured crossbeam. A host is arranged on the main control platform. A motion control card and an image acquisition card are respectively inserted in PCI insertion slots of the host. The host is connected with the servo motor through the motion control card. The servo motor encoder is coaxially connected with the servo motor. The servo motor is fixed on the slide platform. The slide platform is matched and connected with the horizontal slide rail through the slide block. The horizontal slide rail is arranged on the high side of the fixed high and low frame. The host is connected with the camera through the image acquisition card. The camera is arranged on the slide platform through a Z type height adjustable bracket. The measured crossbeam is arranged on the low side of the fixed high and low frame. According to the invention, non-contact and full-automatic high speed on-line measurement is carried out on the hole diameter and the hole site size of an automobile crossbeam assembly hole; and the system and the method are especially suitable for the measurement of the crossbeam with nonuniform assembly hole distribution and without assembly holes in certain areas.

A lens for a liquid crystal display, and a backlight unit and a liquid crystal display having the same. The lens for a liquid crystal display includes a flat portion, a curved portion connected with the flat portion, facing the flat portion and including a first curved surface having a first curvature, and a groove disposed in the flat portion and including a second curved surface having a second curvature. The lens and the groove are formed to extend longitudinally in a first direction.

The invention discloses a LED tunnel light. It includes shell and lighting module. The former includes lamp body fixed structure. The latter includes lens shade formed by lens array which formed by astigmatism convex and condense edge. The astigmatism includes light incidence and emergent planes. The lamp body fixed structure includes fixed frame and fixed plated surface. The invention can control the light distribution to make faculae form rectangle, have even illumination in effective area, little or no parasitic light out the area.

The invention belongs to the field of optical lenses, and particularly relates to a one-step packaging LED (Light Emitting Diode) lens with a free curve and a design method of the same. The lens comprises a plane and the free curve, wherein the plane corresponds to an inner surface, and the free curve corresponds to an outer surface and is used for realizing uniform illumination and rectangular light distribution. When a light emitting surface of an LED chip emits light beams, the light beams are received by a primary lens after being refracted through the inner surface, and are emitted on a road surface through the free curve. The shape of the free curve is obtained through numerical solution based on the energy conservation law and the requirements for the illumination uniformity. As the one-step packaging lens comprises the free curve, all light emitted by LEDs can illuminate the road surface; thus, the utilization rate of the light beams is increased, and the 'zebra pattern effect' is avoided. When the lens is used, the uniform illumination can be realized through combining a plurality of packaged LEDs, the link of the secondary optical design is eliminated, and therefore, a lot of time is saved. The one-step LED light distributing lens is widely used, is suitable for all fields in need of uniform illumination, and has great social and economic benefits.

A light emitting apparatus can prevent unevenness in illuminance from being produced. This light emitting apparatus 5 has: light emitting elements 3 that emit light; and light flux controlling members 4 that control the traveling directions of light emitted from light emitting elements 3, and a plurality of grid convex parts 13 are formed in back surface 12 (i.e. lens bottom surface) of light flux controlling member 4. Grid convex parts 13 vary the incident angles of light incident on back surface 12 of light flux controlling member 4. Therefore, light incident from back surface 12 is scattered without being concentrated, and is emitted from light flux controlling member 4. A surface light source apparatus (1) and a display apparatus (6) include the light emitting apparatus (5).

The invention discloses a plant tissue culture rooting and seedling exercising integrated cultivating device and a cultivating method thereof. The cultivating device comprises a plant cultivation system, an illumination system, a ventilation temperature-control system, a fluid supplying system, a CO2 supplying system and an environment control system. The plant cultivation system comprises a three-dimensional multi-layer cultivation frame and cultivation containers placed on the cultivation frame, each layer of multiple layers of the cultivation frame is provided with one cultivation container, and lifting seedling disc supports are arranged at the bottoms of the containers and used for suspending cultivation plants. The illumination system comprises lamp boxes, LED lamp tubes and fans, and the LED lamp tubes are arranged inside the lamp boxes and connected with the fans to be installed above the cultivation containers in an integrated mode without communication with the cultivation containers. On the premise of guaranteeing that space and time are saved, the cost is low, and the utilization rate of resources is high, the utilization rate of the resources and labor productivity are increased, the cultivation period is shortened, and the production cost is lowered.

The invention discloses a lighting system and a lighting method of a highway tunnel. The lighting system comprises tunnel lighting lamps arranged on the middle part of the interior of the tunnel, tunnel portal lighting lamps arranged on two port parts of the interior of the tunnel, and light shielding sheds arranged on the exterior of two ports of the tunnel, wherein the inner side of the light shielding shed is provided with a liquid crystal light valve plate and a light shielding shed lighting lamp, the lighting lamps in the light shielding sheds and the tunnel are matched with a control system to be controlled, so that the lighting change of a light transition section from the outer end of the light shielding shed to the interior of the tunnel port is more mitigatory, and the lighting intensity of the light shielding shed lighting lamps, the tunnel lighting lamps and the tunnel portal lighting lamps can be adjusted by the control system, so that the electrical energy can be saved on the premise that uniform and safe lighting is ensured.