49results about How to "Good light quality" patented technology

A solid-state lighting device (500) includes a plurality of light-emitting elements (510, 525, 530) configured for generating light that are thermally coupled to a heat spreading chassis configured for coupling to one or more heat sinks (520). The lighting device further includes a mixing chamber which is optically coupled to the plurality of light-emitting elements and configured to mix the light emitted by the plurality of light-emitting elements. A control system is operatively coupled to the plurality of light-emitting elements, and configured to control operation of the plurality of light-emitting elements.

The invention discloses an LED luminaire, in the case of which an LED module is applied to the luminaire body such that the height of the luminaire body and the LED module is ≦8 mm and the luminaire body at least partially forms the heat sink for the LED module. In this case, LED modules having power ratings of ≧3 watts are used. LED operating devices can be used for voltage supply purposes which form an outer face section of an arrangement comprising a luminaire body and an LED operating device, the total height of the luminaire body and LED operating device being ≦10 mm, and the LED operating device preferably being cooled via the luminaire body.

A light emitting device comprises a plurality of light emitting elements sealed with a fluorescent material containing member, each of the plurality of light emitting elements having an upper surface. The plurality of light emitting elements are arranged such that, in a planar view of a light emitting surface, when the plurality of light emitting elements are projected in a parallel direction in a plane of the light emitting surface, traces of the upper surfaces of the plurality of the light emitting elements merge into a single trace. A light emitting apparatus comprises a light-concentrating device, and the light emitting device.

Disclosed is a material structure which is capable of improving optical temperature stability of self-organized quantum dots. The material structure comprises a substrate; a cushioning layer is arranged on the substrate to conceal the defect of the substrate so as to make the growth surface plane; a quantum well layer is arranged on the cushioning layer to generate stress relaxation during the growth and guides the stress relaxation to the quantum dot layer above so as to reduce the thickness of the wetting layer; a barrier layer is arranged on the quantum dot layer and is capable of restricting the current carrier in the quantum dot layer to avoid the weakening of optical temperature stability of the quantum dot material caused by thermally excited transition; a quantum dot layer is arranged on the barrier layer and generates electron hole pairs and radiates composite light when being excited; a cover layer is arranged on the quantum dot layer and is used to change the optical property of the quantum dots and to increase the level spacing between the ground state and the excited state.

A light emitting diode (LED) driving circuit is provided. The LED driving circuit includes a voltage adjusting unit, a switch unit, and a control unit. The control unit is coupled to the voltage adjusting unit and the switch unit. The voltage adjusting unit outputs a driving voltage to a first end of each of a plurality of load units. The switch unit is coupled to a second end of each of the load units. When one LED string in the load units is coupled to a current source, the voltage adjusting unit adjusts the voltage level of the driving voltage so that the voltage level of the driving voltage of the driving voltage corresponds to the driven LED string. Thereby, a driving problem caused by the variation in electrical characteristics of the LEDs is alleviated.

A fiber laser device (1) includes an amplification optical fiber (10) having a core (11) doped with an active element, a first FBG (35) reflecting at least a part of light emitted from the active element, and a second FBG (45) reflecting the light reflected off the first FBG (35) at a reflectance lower than the reflectance of the first FBG (35). The wavelength of a fundamental-mode light beam reflected off the first FBG (35) and the wavelength of a fundamental-mode light beam reflected off the second FBG (45) are matched with each other. The wavelengths of higher-mode light beams reflected off the first FBG (35) and the wavelengths of higher-mode light beams reflected off the second FBG are unmatched with each other.

Provided is a light unit including a plurality of LED light sources formed on a PCB, a resin layer stacked on the PCB to diffuse and guide emitted light forwards, and a diffusion plate having an optical pattern printed thereon to shield light emitted from the LED light sources. The optical pattern is composed of a diffusion pattern implemented as at least one layer, or a combination of the diffusion pattern layer and a light shielding pattern. The light unit forms an optical pattern for shielding or diffusing light on a surface of a light diffusion plate of the back-light unit, and combines a diffusion pattern and a metal pattern to attain uniformity of light and realize a yellow-light shielding effect, thus leading to a reliable light quality.

A light fixture including at least one light emitting device and a light-guiding pillar is provided. The light emitting device is adapted to emit a light beam. The light-guiding pillar has a light incident surface, an end surface opposite to the light incident surface, and a peripheral surface connecting the light incident surface to the end surface. The peripheral surface includes a smooth curved surface, a fillister surface connected to the smooth curved surface, and a reflective surface connected to the fillister surface. The light emitting device is disposed beside the light incident surface. The fillister surface is disposed at two opposite sides of the reflective surface. Extending directions of a plurality of fillisters on the fillister surface are substantially parallel to an extending direction of the light-guiding pillar.

A stacked pipe light emitting diode lighting fixture with uniform and uninterrupted emitted light is disclosed. The stacked pipe light emitting diode lighting fixture comprises a plurality of transparent light pipes disposed in a housing. A light emitting diode module is connected to a light receiving end of each light pipe. The light pipes and connected light emitting diode modules are positioned so that light reflecting ends of the light pipes overlap the light emitting diode modules. As a result, the emitted light is uniform in intensity and uninterrupted for one end of the stacked pipe light emitting diode lighting fixture to the other end of the stacked pipe light emitting diode lighting fixture.

The invention discloses a planting method of hypsizygus marmoreus and relates to the technical field of agricultural planting. The planting method of hypsizygus marmoreus comprises the following steps: S1, preparing a cultivation material; S2, bagging and sterilizing; S3, inoculating and sterilizing; S4, cultivating; S5, scratching; S6, mycelium stimulating; and S7, hyjpsizygus marmoreus producing. Hypsizygus marmoreus is influenced by culture time, fungus bag weight, light source and light quality, illumination intensity and ventilation quantity in a planting process. Research experiments are conducted from the culture time, the fungus bag weight, the light source and light quality, the illumination intensity and the ventilation quantity respectively, and the optimal culture time, the fungus bag weight, the light source and light quality, the illumination intensity and the ventilation quantity for culturing the hypsizygus marmoreus are researched. The planting method of hypsizygus marmoreus can improve marketability of hypsizygus marmoreus and can also increase the yield of hypsizygus marmoreus.

The invention relates to a light conversion agent and a preparation method thereof. The formula of the light conversion agent is [Sm(M)<1-x>.Ln], wherein the M represents a rare earth ion, L represents an organic ligand, 0

A device for backlighting a liquid-crystal matrix array of a flat screen for viewing in day- or night-vision mode with NVIS compatibility includes a light guide GL which comprises a main cuboid plate shape PP assembled together with at least one right-angled triangular auxiliary prism PA1 which comprises at least one reflective face, and which is arranged together with the main plate to define, on the same lateral face of the plate, two distinct injection windows, one injection window I1 for a nighttime light source and one injection window I2 for a daytime light source. The nighttime light is injected into the plate, by reflection within or off the auxiliary prism in the direction of the respective injection window (I1). The lateral face of the prism that directly receives the light emitted by the nighttime source may comprise an optical filter F_NVIS-c formed collectively over its surface by deposition of dielectric films.

A light source mechanism for an imaging apparatus comprises at least a point light source and a light shield. The point light source located at one end of the light shield is used for providing illumination to the imaging apparatus during a scanning process. The light shield is a hollow pipe structure and further includes a long slot lying along an axial longitudinal direction thereof for allowing lights to leave the light shield. An inner surface of the light shield is made as a diffusion surface for evenly diffusing lights inside the light shield, by which a homogeneous line light source for the scanning process is formed at the long slot of the light shield.

A signal processing method and an optical pickup are capable of reducing signal distortion. Before being transmitted over a flexible cable to an optical disk drive controller, a low-pass filtering process is performed over the light detection signals or their arithmetic results in the optical pickup to eliminate high frequency compositions of the signals. By this way, the interference resulting from the flexible cable during signal transmission is mitigated. The retained data in the signals are further applied to recover servo control signals. Therefore, the stability of an optical disk servo control is improved, especially for a high-speed optical disk system.

A flicker-free dimming circuit for non-point light source has a TRIAC module, an input module, a conversion module and an output module. The TRIAC module adjusts the voltage phase of an external power supply for the input module to export an input voltage, and the conversion module in a boost circuit structure is provided with a conversion coil and a converter to receive and raise the voltage value of the input voltage to a voltage value of an operating voltage and then supplies the operating voltage to the output module. The output module adopts a fly-back circuit structure and induces the operating voltage to form a driving voltage in a constant value and then outputs the driving voltage to a lamp with a relatively wide light source area. In this way, the panel lamp can meet high safety standards and enhance its product adaptability and competiveness.

The invention discloses a dry and hot valley region cauliflower tissue culture seedling hardening method, and particularly relates to the technical field of tissue culture seedling hardening. The method comprises the following steps that a tissue culture seedling bottle is transferred from an incubator to an indoor shady and cool region, placed for 2 days, then transferred to a sunshine oblique irradiation region, and placed for 3 days; prepared matrixes are subpackaged into hole seedling trays; the tissue culture seedlings are taken out of the tissue culture seedling bottle, washed clean and soaked in a bactericide; single broccoli plants are correspondingly transplanted into the hole seedling trays, and irrigated with a rooting stimulating solution; a seedling tray is placed in a shading area, and the seedling tray is completely covered with a non-porous plastic cover with red and blue alternated on the first day; and the seedling tray is continuously covered with a red and blue plastic cover with a plurality of through holes from the second day to the seventh day, the cover is taken down after 7 days, alternate irrigating of water or fertilizer water is carried out during the period, and then the seedling tray is transplanted into a field. By means of the dry and hot valley region cauliflower tissue culture seedling hardening method, the seedling hardening survival rate of the cauliflower tissue culture seedlings in the dry and hot river valley region is greatly increased.