181results about How to "Improve light mixing effect" patented technology

The invention discloses an LED (Light Emitting Diode) lamp tube, which comprises a glass tube, lamp caps arranged at two ends of the glass tube as well as an LED lamp strip arranged in the glass tube, wherein the inner wall of the glass tube is coated with a light increasing and heat radiating film; and the LED lamp strip is fixedly adhered to the inner wall of the glass tube through a high heat conduction bonding adhesive. The light increasing and heat radiating film is an aluminum-coated layer, or a frosted heat conduction light increasing adhesive layer or a nano adhesive layer capable of increasing light and radiating heat. The LED lamp strip comprises a substrate, wherein a plurality of LED light sources are welded on the substrate, or an integrated light source consisting of an LED chip is packaged on the substrate; and a driving power supply module is also arranged on the LED lamp strip. According to the LED lamp tube disclosed by the invention, the light emitting efficiency, the light emitting angle and the illumination area of the LED lamp tube are increased; the problems of glare and point light existing in the LED lamp tube are solved; heat generated by an LED is transmitted to the whole glass tube through the substrate of the LED, so that the heat radiating area is greatly increased and the heat increasing speed of the LED lamp tube is increased; the LED lamp tube can be applied to a lamp holder of a traditional fluorescent lamp, and thus the generality of the LED lamp tube is greatly improved; and the replacement and use costs are reduced.

A light emitting apparatus at least includes a circuit board, several light emitting diodes (LEDs), a first reflective substance, and a diffusion structure. The LEDs, including red (R), green (G), and blue (B) LEDs, are disposed on the circuit board and connected therewith, and the first reflective substance is disposed on the circuit board and having a plurality of cavities for the LEDs. The diffusion structure is disposed on the circuit board and covering the LEDs. The diffusion structure includes several indentations, a transparent main body and several diffusion beads. The indentations are formed on a bottom surface of the diffusion structure and face the LEDs to accommodate the LEDs. The diffusion beads are dispersed in the transparent main body and diffuse light emitted from the LEDs so that light emitted from R/G/B LEDs can be mixed into white light more sufficiently through the diffusion structure.

The invention provides a backlight module. The backlight module comprises a frame, lighting units and light mixing plates, wherein the lighting units are configured on the inner surface of the frame, and the light mixing plates are arranged above the lighting units; a plurality of penetrating parts are distributed on the lighting mixing plates, provided with through holes with different pore diameters, arranged for energy density of light emitted by the lighting units and distributed on the lighting mixing plate, and used for providing lower light permeability for areas with higher light energy density as well as providing higher light permeability for areas with lower light energy density so as to realize the purpose of uniform light mixing.

The invention discloses a pixel structure and an organic light emitting display adopting the same. The pixel structure comprises a plurality of pixel units, wherein each pixel unit takes a rhombus structure formed by an upper half part and a lower half part; the adjacent pixel units are arranged in a staggered manner; each pixel unit comprises a plurality of sub pixels; a first sub pixel forms one of the upper half part and the lower half part of the rhombus pixel unit; a second sub pixel and a third sub pixel are arranged side by side to form the other of the upper half part and the lower half part of the rhombus pixel unit together; pixels in the same color of the pixel units in the adjacent rows are arranged adjacently. By integrating the same sub pixels together, the width of the corresponding vapor deposition Mask hole diameter can be enlarged, the difficulty of the Mask technology can be reduced, and the display PPI (Pixel Per Inch) can be improved; meanwhile, because of the staggered arrangement manner of the pixel units in the adjacent rows, the adjacent edges of the second sub pixel and the third sub pixel with the first sub pixel can be longer, main light emitting of the pixel units can be relatively concentrated, and the light mixing effect is good.

Disclosed is a white light emitting diode module including a conducting wire frame, a first primary color chip, a second primary color chip and a phosphor layer. The conducting wire frame has an accommodating groove. The first primary color chip is installed at the bottom of the middle of the accommodating groove, and the first primary color chip transmits a first light emitting source with a wavelength λ₁. The second primary color chip is stacked on top of the first primary color chip and the second primary color chip transmits a second light emitting source with a wavelength λ₂. The phosphor layer is formed on the second primary color chip and excited to produce a fluorescent light with a wavelength λ₃. Therefore, the stacked LED chips and the phosphor can be used to obtain a white light source with high color saturation.

The invention discloses a white light emitting diode with high color rendering property and a white light emitting diode lamp. The white light emitting diode comprises a heat conducting substrate, a light reflecting cup, a light emitting diode chip and a lead wire frame, wherein the light reflecting cup plays a light mixing role, and small protrusions are arranged on the inner wall surface of the light reflecting cup; the light emitting diode chip outputs at least six lights in different colors and is arranged on the heat conducting substrate to carry out electric combination; the lead wire frame is matched with the bottom of a light emitting cup in shape and size, arranged outside the light reflecting cup, and fixed on the upper surface of a base; an electrode of the chip is electrically connected with a lead wire on the lead wire frame, and a transparent optical material is covered on the chip; and polychromatic lights are evenly mixed through the diffuse reflection of a reflecting wall of the light reflecting cup to produce the white light emitting diode with high color rendering property and high efficiency. By applying the white light emitting diode lamp made of the white light emitting diode and a flat light source, the white light emitting diode lamp eliminates the light energy loss of fluorescent powder in the photochromic conversion process, thereby having high electro-optical conversion efficiency, long service life and convenient batched production.

A light source reflector includes a conical reflective surface, and a flat reflective surface formed on a rim of the conical reflective surface. The conical reflective surface has a plurality of unit curved surfaces with convex surfaces or concave surfaces. Also, the flat reflective surface is provided with a plurality of refraction protrusions, to improve the optical efficiency and light-mixing effect of the light source reflector.

The invention provides a design method of a light-emitting diode (LED) even-illumination light source based on a high-diffuse-reflection-rate free-form surface. A general mathematical model of a free-form surface diffuse reflection surface for secondary light distribution is built by utilizing a bidirectional reflection distribution function (BRDF) of a high-diffuse-reflection-rate surface according to light-emitting characteristics of the LED light source. The mathematical model is utilized to write a nonlinear algebraic equation set by combining specific requirements for target illumination areas and the irradiance distribution in an actual application occasion, and a numerical method is utilized to conduct calculation to obtain a surface type outline of the diffuse free-form surface. The LED indirect light source based on the high-diffuse-reflection-rate free-form surface is compact in system structure, high in illumination evenness and capable of being used in the fields of color vision measurement, indoor illumination, projector devices and the like requiring high-evenness illumination conditions and has good application prospects.

The invention provides a display device and a backlight module. The backlight module comprises a circuit board, multiple mini LEDs (light emitting diodes), a protective adhesive layer covering the multiple mini LEDs and the circuit board, a transparent substrate arranged on one side, deviating from the circuit board, of the protective adhesive layer and a diffusing plate arranged on one side, deviating from the circuit board, of the transparent substrate, wherein the thickness of the transparent substrate meets mixed light distances of the mini LEDs. The transparent substrate serves as a support structure between the protective adhesive layer and the diffusing plate, so that light emitted by the mini LEDs is sufficiently mixed before reaching the diffusing plate, and the backlight illumination effect is improved.

The invention provides a pixel structure and a display device. The pixel structure comprises a plurality of pixel units. Each pixel unit comprises a first sub pixel with a first color, a second sub pixel with a second color and a third sub pixel with a third color, wherein the first sub pixel is provided with a first adjacent side with a first length and a second adjacent side with a second length, the second sub pixel is provided with a first adjacent side with the first length and a second adjacent side with a third length, and the third sub pixel is provided with a first adjacent side with the second length and a second adjacent side with the third length. According to each pixel unit, the first adjacent side of the first sub pixel is adjacent to the first adjacent side of the second sub pixel, the second adjacent side of the first sub pixel is adjacent to the first adjacent side of the third sub pixel, and the second adjacent side of the second sub pixel is adjacent to the second adjacent side of the third sub pixel. According to the pixel structure and the display device, due to the fact that the adjacent sides are arranged between every two adjacent sub pixels, the light blending effect between the sub pixels inside each pixel unit is improved, and the image quality of a display frame is improved.

A backlight module including a light source, an optical wavelength conversion film, a first group of optical films, and a second group of optical films is provided. The light source is adapted to emit a first light. The optical wavelength conversion film is adapted to convert the first light into a second light with a different wavelength. The first group of optical films is disposed between the light source and the optical wavelength conversion film. The optical wavelength conversion film is disposed between the first group of optical films and the second group of optical films, wherein a ratio of a transmittance of the second group of optical films for the second light to a transmittance of the first group of optical films for the first light is larger than or equal to 45%. Thus, the backlight module has a uniform light-emitting color.

The invention discloses an LED (Light-Emitting Diode) three-dimensional packaging-based vehicle headlamp. The vehicle headlamp comprises a reflecting mirror and an LED three-dimensional packaging light source which is arranged in the reflecting mirror, wherein the LED three-dimensional packaging light source comprises a base; the base is provided with at least two light-emitting areas capable of controlling light independently; each light-emitting area comprises at least one LED chip mounting surface; the LED chip mounting surfaces faces to different directions; an LED chip is arranged on each LED chip mounting surface; a packaging body covers the LED chip; and the inner wall of the reflecting mirror is opposite to each LED chip mounting surface. Since the reflecting mirror and the LED three-dimensional packaging light source are provided and the light source is provided with at least two light-emitting areas capable of controlling light independently, the change of an emergent direction or angle of the headlamp is achieved by controlling lightening of the LEDs of a certain or some light-emitting areas and extinguishing of the LEDs of other light-emitting areas and through combining with the reflecting mirror. The invention also discloses a vehicle illumination method which is capable of improving the safety of a vehicle running at night.

The invention discloses a light-emitting diode (LED) packaging method, an LED packaging device, a light adjusting method and a light adjusting system. The LED packaging method comprises the following steps of: combining two or more than two LED chips which generate different fluorescence emission wavelengths into one group; mounting the group of LED chips on the same substrate; manufacturing a light-transmitting lens layer; and packaging the LED chips combined in one group in the same cavity through the light-transmitting lens layer. The LED packaging method, the LED packaging device, the light adjusting method and the light adjusting system, which can improve the white light rendering property and the light-mixing effect, realize light brightness, development and color temperature adjustment, overcome color spectrum defects and improve lighting effect, are provided through the technical scheme.

The invention provides a light guide plate, a backlight module using the light guide plate and a display device using the backlight module, wherein the light guide plate comprises a light guide plate body; the light guide plate body is provided with a light incoming surface and a light outgoing surface arranged oppositely; an optical dent for refracting and diffusing light is arranged on the light incoming surface; a refracting surface for coating a light source is formed on the inner surface of the optical dent; and the surface of the light incoming surface is also provided with a plurality of optical dots for reflecting light. Due to the light guide plate, the thickness of the backlight module and the thickness of the display device are reduced, and ultra-thin design of the display device is realized.

The invention provides a light source unit and a backlight module provided with the light source unit. The light source unit for the backlight module provided by the invention comprises a circuit board and a plurality of crystal grain combinations which are arranged along a first direction of the circuit board. Each crystal grain combinations comprises a red light LED crystal grain, a blue light LED crystal grain and a green light LED crystal grain. By adopting the conception of COB, the tricolor LED crystal grains are directly arranged on the circuit board, which ensures that the space between crystal grains is greatly decreased, effectively shortens the light mixing distance, and ensures that the backlight module of the light source unit is thinner and lighter.

The invention discloses a light-emitting diode device which includes a substrate with a circuit pattern, a reflective layer arranged on the substrate, at least one light-emitting chip arranged on the reflective layer, a reflector winding the light-emitting chip, a colloid covered on the light-emitting chip, and a phosphor powder layer arranged above the colloid. The light-emitting chip has a conductive part, and the circuit pattern of the substrate is connected with the conductive part. In the embodiment, a plurality of light-emitting chips are arranged in a linear way, moreover, a distance piece is arranged between two adjacent light-emitting chips.

The invention discloses a light-emitting device and a manufacturing method of the light-emitting device. The light-emitting device comprises a substrate, a light emitting diode grain, a first light-pervious layer, a light wavelength conversion layer and a second light-pervious layer. The substrate is provided with a grain attachment portion, the light emitting diode grain is arranged on the grain attachment portion, the substrate is provided with a base, and the base is made of light-pervious materials. The first light-pervious layer covers the side face of the light emitting diode grain, the light wavelength conversion layer evenly covers the first light-pervious layer and the light emitting diode grain, and the second light-pervious layer covers the light wavelength conversion layer.

The invention relates to a backlight module comprising a light guide plate, a light mixing plate and a plurality of light sources, wherein the light guide plate is provided with a first side surface. The light mixing plate is provided with a light incidence surface with irregular surface and a light emergent surface with a fog surface and is arranged on the first side surface of the light guide plate. The light sources arranged corresponding to the light incidence surface; light emitted from the light sources enters the light mixing plate through the light incidence surface; the light exits from the light emergent surface and enters the light guide plate through the first side surface.

The present invention discloses a light-mixing layer and its light-miting method. When the light-mixing device is made, said invention adopts the processing mode to make the particles of all the components in the light-mixing layer produce alternative arrangement, so that after the light wavelength provided by light-emitting source is absorbed by said light-mixing layer, it can make the fluorescent body particles be excited to produce another light wavelength, and said two different light wavelengths are collected in the light-mixing layer so as to can obtain full light diffusion, light conversion and light mixing, after the lights are mixed, a high-uniformity, high-luminance and constant light source can be produced.

The invention provides a device and a method for protecting a surface-mounted light emitting diode (LED). The device comprises at least one transparent protection cover, wherein each transparent protection cover comprises a side wall and a light transmission surface; the side wall and the light transmission surface are moulded into a whole; the side wall is a four-sided rectangular enclosure frame; an opening is formed at the bottom of the enclosure frame; the light transmission surface is arranged at the top of the enclosure frame; the light transmission surface is one of a plane, a convex surface, a concave surface, an inclined surface and an inclined convex surface; and potting adhesives are filled among the protection cover, a circuit board and an LED lamp shell. By the invention, the surface-mounted LED which is only applied to indoor environments can be also applied to outdoor environments.