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

An illumination apparatus, comprising at least one light emitting source embedded in a waveguide material is disclosed. The waveguide material is capable of propagating light generated by light emitting source(s), such that at least a portion of the light is diffused within the waveguide material and exits through at least a portion of its surface.

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.

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 lighting device of the type used as reading light in a vehicle. The lighting device comprises a single light-emitting diode and internal supply means adapted to generate a current to the single light-emitting diode. The internal supply means are connectable to an external power network. The device has an optical unit to recenter and focus the luminous flux emitted by the single light-emitting diode.

The invention relates to a shadow-less incision protector. The shadow-less incision protector comprises an outer clamping ring, a channel, an inner clamping ring and an illumination lamp. The outer clamping ring is arranged on one side of the channel, and the inner clamping ring is arranged on the other side of the channel. The channel is made of a silica gel material or a PU material. The inner clamping ring comprises an upper protruding edge portion, a lower protruding edge portion and a concave portion. The upper protruding edge portion is connected to one side of the concave portion, and the lower protruding edge portion is connected to the other side of the concave portion. The illumination lamp is arranged on the inner surface of the concave portion. The shadow-less incision protector has the advantages that the shadow-less incision protector can provide illumination, a surgical field is not affected and the surgical operation difficulty is reduced while a surgical incision is protected, the surgical operation field under the shadow-less incision protector can be clearer, the surgical safety is remarkably improved, and surgical related complications are decreased. The shadow-less incision protector can become a special medial instrument product and has a wide application prospect in clinic popularization.

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.

The invention discloses a decyl imidazole blue-light emission organic light-emitting material and a preparation method thereof .N-decyl is introduced into an imidazole structure unit, a phenanthroimidazole compound obtained through triphenylphosphine oxide functionalization is formed, the solid light-emitting characteristics, flame retardance, compatibility and machinability of the material are achieved while the solubility of the material is improved, and meanwhile the blue-light emitting characteristics of the material are kept .The preparation method is easy to implement and environmentally friendly, synthesis is convenient, the adopted solvents can be recycled and reduced, the obtained product is easy to purify and can be used as the blue-light conversion material for agricultural film production, the light quality of agricultural films is improved, the material can also be used as the blue-light emitting material for the fields of light-emitting devices, anti-fake materials, fluorescent sensing and the like, and the material can be used through solvent dissolution processing and can also be used as a solid material to be directly used, so that use is quite convenient .

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, light detection signals or their arithmetic results are tracked / held in the optical pickup, wherein the desired portions are tracked and the undesired portions are held. By this way, the interference, which is caused from the undesired portions, to the desired portions is mitigated. Therefore, the stability of an optical disk servo control is improved, especially for a high-speed optical disk system.

The invention relates to a LED illuminating lamp glare prevention structure comprising a primary light variation structure and a secondary light variation structure, wherein the primary light variation structure comprises a small light reflecting cup and a lens, wherein the small light reflecting cup is arranged on the front end of an LED light source assembly of the LED illuminating lamp, and the lens is arranged on the cup mouth of the small light reflecting cup; the secondary light variation structure comprises a large light reflecting cup and a cambered-surface lens, wherein the large light reflecting cup is arranged in front of the lens of the primary light variation structure and used for attaching to a bottom edge surrounding the lens, and the cambered-surface lens is arranged on the cup mouth of the large light reflecting cup. A glare prevention LED illuminating lamp comprises an LED light source assembly, an LED illuminating lamp heat radiator and an LED illuminating lamp glare prevention structure, wherein the LED illuminating lamp glare prevention structure is arranged in front of the LED light source assembly. The glare prevention LED illuminating lamp can effectively overcome the glare phenomenon by being configured with different glare prevention accessories and shells according to the farness of an illuminating distance and different illuminating space environments and has good illuminating effect and convenient installation and use.

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 having a lamp housing (8) having a receptacle (6), which receptacle is adapted for receiving a socket (2) for a halogen pin-base lamp (1), wherein a heat sink (102) having thermal contact with the lamp housing (8), and on which an LED (101) is fastened, is at least sectionally received in the receptacle (6).

Disclosed is an illuminated switch device capable of effectively preventing light leakage between different light sources, thereby obtaining a good lighting quality, while reducing the overall size of the switch device. The illuminated switch device includes: a casing that has an open upper end and a partition wall provided therein and is formed on a bottom plate member having light sources and a push switch mounted thereon; and an operating body that has a light-shielding wall provided on the rear surface of an upper plate, is arranged so as to close the open end, and can be pressed. First and second illuminated regions to which light components are emitted from first and second light sources are provided on the upper plate. A protruding portion is formed at a leading end portion of a light-shielding wall, and a concave groove is provided at a leading end portion of a partition wall. The leading end portions are opposite to each other such that they can approach or separate from each other. At least a part of the protruding portion is arranged in the concave groove, and a gap is formed between the leading ends of the protruding portion and the concave portion.

A spotlight and a converging lens are provided. The converging lens has a light-emitting surface and a light incidence surface. An outer diameter of the converging lens is progressively decreased from the light-emitting surface toward the light incidence surface. The light-emitting surface has an opening. A maximum distance between the light incidence surface and the light-emitting surface along a thickness direction of the converging lens is H1, a maximum distance between a bottom surface of the opening and the light incidence surface along the thickness direction is H2, and 0.3×H1≦H2≦0.5×H1. The light incidence surface has at least one annular groove. The at least one annular groove has a central axis. The converging lens of the invention may converge light beam and mitigate a light spill phenomenon, and the spotlight applying the converging lens has good lighting quality.

The invention provides an operating shadowless lamp optical engine and a shadowless lamp. The operating shadowless lamp optical engine comprises a light source module, an optics plastic module and an engine framework. The engine framework comprises an upper framework and a lower framework. The upper framework and the lower framework are connected through a moment arm. The light source module is connected with the lower framework of the engine framework. The optics plastic module is installed on the engine framework. According to the operating shadowless lamp optical engine, an optical engine standardized module is integrated, and the advantages that an LED new light source technology is minimized, the light quality of a cold light source is good, the service life is ultra-long, and the luminance and the color temperature are adjustable are applied integrally; design and manufacture are standard, the consistency of products is ensured, a traditional operating shadowless lamp body can be replaced compatibly with the shadowless lamp, the self reliability is high, and replacing is convenient; and a high-quality color-temperature light-mixing adjusting and controlling technology is achieved, the phenomena of uncontrollable astigmatism and rainbows are avoided, the using effect of the operating shadowless lamp is affected, the irradiation range of emergent light can be adjusted freely, and the operating shadowless lamp optical engine is flexible and convenient.