219results about How to "Good light diffusion effect" patented technology

A lamp system which can improve radiation performance is provided. A metallic heat conduction part provided along a peripheral portion of a metallic cover is fitted with a resin heat conduction part provided along a peripheral portion of a transparent cover so as to thermally contact each other. Heat generated by an LED is radiated into air from the metallic cover and at the same time is efficiently conducted from the metallic cover to the transparent cover to be radiated into air from the transparent cover.

The present invention discloses a diffusion piece and comprises a diffusion layer. The diffusion layer consists of a transparent resin parent metal, as well as a first scattering particle and a second scattering particle doping in the transparent resin parent metal. The refractive index of the first scattering particle is smaller than the refractive index of the second scattering particle. The light diffusion effect of the diffusion piece is strong.

A gel system comprising a fractal network of nanoparticles and macroscopic particles is disclosed. The gel system is capable of forming an “optical gel” effective to blurrfine lines and wrinkles as a consequence of the size domain differences between the fractal particles and the macroscopic particles. Cosmetic compositions comprising such gels and methods for their use are also disclosed.

A light guide plate includes an incident plane for receiving a light source of a light emitting device, a bottom surface connected to the incident plane, and an emergent plane corresponding to the bottom surface for outputting the light source of the light emitting device, and the light emitting device is installed on one side of the incident plane of the light guide plate; wherein the incident plane of the light guide plate has a structure consisted of a plurality of polyhedrons, such that an incident light of the light emitting device passes through the polyhedron structure to improve the light diffusion effect and make the light produced by the light emitting device evenly diffused towards the emergent plane of the light guide plate.

A diffuser plate with higher light diffusion efficiency and brightness applied to backlight module of Liquid Crystal Display TV (LCD TV) for providing uniform light is disclosed. An optical lens with a diffusion layer is disposed on one side of the substrate. The diffusion layer is arranged above the optical lens for enhancing diffusion effect. The other side of the diffuser plate can be a plane or having a lens structure. By Lenticular lens, the homogeneity of emitted light is improved so as to reduce the amount of diffusion particles being added into the diffusion plate Therefore, the light transmission is increased and the brightness is enhanced. Meanwhile, ability of shielding lamps is considered and Moiré effect is eliminated. Moreover, the diffusion layer is co-extruded on surface of the Lenticular lens together with the substrate so that the device is easy to be produced.

The light diffusing plate includes a lens substrate, a plurality of microlenses disposed on a surface of the lens substrate, a plurality of light exit areas, each having a circular or rectangular form a center of which is coincident with an optical axis of the microlens, and a light shield layer formed on another surface of the lens substrate, and covering other area than the light exit areas. When n and t are a refractive index and a thickness of the lens substrate, respectively, and C (R; diameter, A, B; sides of rectangle) is a size of light exit area, a size of the microlens Sr satisfies the following formula in the light diffusing plate: Sr≧2t×tan θ+C (with the proviso that θ=sin⁻¹(1/n)). Or, a form of the microlens in the light diffusing plate is a part of an ellipsoid shown in the following formula X²/a²+y²/a²+z²/c²=1 (x and y represent axis on the surface of the lens substrate, z represents the optical axis), it's eccentricity ε is shown in the following formula ε=(c²−a²)^1/2/c=1/n and it's far focal point is coincident with a position of the light exit area. The liquid crystal display apparatus and the rear projection apparatus use the light diffusing plate.

The invention relates to a light diffusing agent, a PMMA (polymethyl methacrylate) light diffusing plate and a manufacturing method thereof. The light diffusing agent is a random copolymer of styrene (St) and methacryloxypropylisobutyl polyhedral oligomer silsesquioxane (MAiBuPOSS). The PMMA light diffusing plate comprises the following components in percentage by weight: 97.0-99.5% of polymethyl methacrylate and 0.5-3.0% of light diffusing agent. The refractive indexes of the styrene component and the MAiBuPOSS component in the light diffusing agent differ from the refractive index of PMMA; when passing through a material, a light ray is refracted for many times and becomes bright and soft after passing through a substrate. Meanwhile, the MAiBuPOSS component ensures that the dispersibility of PS (Poly Styrene) in PMMA is remarkably improved, excellent light transmission and light scattering are obtained, and the optical efficacy is high. The PMMA light diffusing plate manufactured by the invention can be used for LED (Light Emitting Diode) illumination lamps, such as a plate lamp, an advertising lamp box, a professional film viewer, a down lamp and the like.

The invention provides a photodiffusion film. The photodiffusion film comprises transparent substrates, a first diffusion layer and a second diffusion layer which are stacked sequentially, wherein the first diffusion layer is formed by spherical diffusion particles, whose average particle diameter ranges from 0.1 to 5 micron, and the first diffusion layer is coated with the second diffusion layer. The invention further provides a preparation method of a photodiffusion film. The method comprises the following steps: a first diffusion layer and a second diffusion layer are sequentially formed on one surface of transparent substrates, the first diffusion layer is formed by spherical diffusion particles, whose average particle diameter ranges from 0.1 to 5 micron, by virtue of a method of self-assembly film forming, and the first diffusion layer is coated with the second diffusion layer. The photodiffusion film provided by the invention has excellent photodiffusion performance; moreover, by the adoption of the preparation method for preparing the photodiffusion film, the photodiffusion film can be prepared and has the advantages that the thickness of a photodiffusion layer is less than 10 micron, and the photodiffusion performance can be remarkably improved.

The invention relates to a fluorescent microsphere and its preparation method. Particle size of the fluorescent microsphere is within the range of 0.1-10 micrometer. The fluorescent microsphere has good sphericity and narrow particle size distribution and also has fluorescent brightening groups. The fluorescent brightening groups are uniformly or randomly distributed in a polysiloxane microsphere or on the surface of the polysiloxane microsphere such that the polysiloxane microsphere has a fluorescent brightening effect, has high light fastness, has excellent heat resistance and high chemical stability, can absorb ultraviolet rays to prevent aging of a product, is especially suitable for an originally yellowish product, endows a product with bright white appearance, can make a colored product more dazzlingly beautiful when used in the colored product, and can enhance brightness of a product when used in a black product. The invention, on the other hand, provides a preparation method of the above fluorescent microsphere and a prepared photodiffusion material.

Disclosed is a lens structure, which comprises a lens body, and the lens body is provided with a light incidence plane, a light emergence plane and a light reflection plane. The light incidence plane is opposite with the light emergence plane, the light reflection plane is in cone shape and is connected with the middle of the light incidence plane and the light emergence plane. The area of the light incidence plane is smaller than that of the light emergence plane, and the light emergence plane is a concave surface and /or is provided with a microdiffusion particle layer. The lens structure is provided with a fine photodiffusion effect. Further, the invention also provides a luminous unit with the above-mentioned lens structure.

The objective of the present invention is to provide excellent thermostable aromatic polycarbonate resin composition with high light diffusibility and high light permeation rate simultaneously, without generation of silver plaque and resin speckle. The resin composition according to the invention has light diffusibility, relative to 100 parts by weight of aromatic polycarbonate resin (A ingredient), containing 0.01-3.0 parts by weight of crosslinking (methyl) acrylic polymer particles (B ingredient), which are not compatible with the aromatic polycarbonate resin, and reduces 5% of weight detected by calorimetry device when temperature is above 300 DEG C.

The invention discloses a negative phototropism module and its pervasion plate structure. The negative phototropism module mainly contains lamp-house module equipped with light source and pervasion plate structure located on the upper of the lamp-house module. The pervasion plate structure includes board, several astigmatic microstructures and condensing microstructures. The astigmatic microstructures and condensing microstructures are radial arranged on out-light surface or in-light surface of the board. Astigmatic microstructures contain several cambered surface transmission microstructures, each of the cambered surface transmission microstructures possess an arc convex surface. Condensing microstructures possess several convex prism microstructures. The microstructures of convex prism have two corresponding side surfaces which has an included angle theta.

The invention discloses a green quantum dot film and a preparation method of a backlight module thereof. The method performs functional design on the protective layer of the green quantum dot film; the outer surface of the protective layer has a good light diffusion effect after being coated, and inorganic diffusion particles in the coated layer play a role in blocking light in some bands, thus the light damage caused by long-time light irradiation on the quantum dot is slowed down. The invention also provides a using method of the green quantum dot film, the using method matches the green quantum dot film and a blue chip with red phosphor to make a novel LED light source, and the using method improves the stability of the quantum dot film while greatly increasing the color gamut coverageof the LCD.

There is provided a light reflection plate that can uniformly exhibit high light diffusibility. The light reflection plate includes 100 parts by weight of a polyolefin-based resin and 20 to 120 parts by weight of a coated titanium oxide that is obtained by coating a surface of titanium oxide with a coating layer containing aluminum oxide and silicon oxide. The coated titanium oxide is constituted by primary particles having a particle size of 0.10 to 0.39 μm and agglomerated particles which are formed by agglomeration of the primary particles and have a particle size of 0.4 μm or more. The number of the agglomerated particles in a cross section of the light reflection plate in a thickness direction is 0.1 to 4.5 /900 μm² and the number of the primary particles, which are not agglomerated, in the cross section of the light reflection plate in the thickness direction is 1.5 to 11.0 /900 μm².

The invention discloses a preparation method of a perovskite quantum dot composite, comprising the following steps: S1, mixing a first precursor and a second precursor with an organic solvent to obtain a perovskite precursor mixed liquid; S2, mixing the perovskite precursor mixed liquid in S1 with polymer microspheres to obtain a mixture of perovskite quantum dot polymer microspheres; S3, and subjecting the mixture of perovskite quantum dot polymer microspheres in S2 to solvent removal treatment to obtain the perovskite quantum dot composite. The preparation method of the perovskite quantum dot composite is simple, rapid, efficient and easy to operate, and can produce a perovskite quantum dot composite which is stable in air, is not easily quenched during light emitting, and can be furtherdirectly applied.

The invention discloses a light-transmitting inorganic light diffusion agent which is characterized by comprising the following components by weight percent: 85%-94% of cryolite, 3%-8% of pyrophyllite, 2%-5% of kaolin, 0.5%-1% of potassium feldspar and 0.2%-1% of brucite. A fluidized bed is coated with cryolite, a powdery material is mixed with heated hot air in a rotational-flow dynamic calcining furnace, the specific surface of the cryolite is instantly calcined and molten and is spheroidized, and the surface of cryolite is covered with a reflection layer, so that cryolite has good light transmitting and reflectivity. The light diffusion agent is high in micro-particle sphericity and good in flowing dispersity, can be used at a high temperature of 800 DEG C or above, has excellent high temperature resistance, has a reflectivity different from most transparent resins, can be uniformly dispersed in resin so that a point light source is changed into an area light source, light transmitting and dodging effects are achieved, and therefore high light transmittance is ensured and good haze is achieved.

The invention which belongs to the technical field of the material chemistry relates to a brightening light diffusion material and a preparation method thereof. The brightening light diffusion material is characterized in that the brightening light diffusion material comprises the following components, by weight, 0.005-1% of a photoluminescent material, 0.02-5% of a light diffusant, and the balance transparent material. Compared with a case that only the light diffusant is added to a base material which treats the transparent material as a main component, the photoluminescent material and the light diffusant are added to the base material which treats the transparent material as a main component in the invention, so the light transmittance of the transparent material is improved and the light diffusion effect is improved.

The invention relates to an optical film and a manufacturing method thereof, which comprises a light-permeable base material, a plurality of diffusion micro-particles distributed on the base material and a light collection layer arranged on the surface of the base material. Part of the diffusion micro-particles lead at least one surface of the base material to form bulges, and the protrusive height of part of the bulges is larger than or equal to 0.5 mu m. The manufacturing method of the optical film mainly comprises the following steps: heating the base material for leading the base material to be in molten state, adding the diffusion micro-particles on the surface of the base material, curing the base material for forming the base material, and finally forming the light collection layer on the surface of the base material. The optical film only contains the double-layer structure of the base material and the light collection layer, and can still achieve the effects of light collection and light diffusion atomization while reducing the number of film layers, so that the manufacturing method has the advantages of easy manufacture and reduced cost.