65results about How to "Uniform color temperature" patented technology

A method and apparatus for coating a plurality of semiconductor devices that is particularly adapted to coating LEDs with a coating material containing conversion particles. One method according to the invention comprises providing a mold with a formation cavity. A plurality of semiconductor devices are mounted within the mold formation cavity and a curable coating material is injected or otherwise introduced into the mold to fill the mold formation cavity and at least partially cover the semiconductor devices. The coating material is cured so that the semiconductor devices are at least partially embedded in the cured coating material. The cured coating material with the embedded semiconductor devices is removed from the formation cavity. The semiconductor devices are separated so that each is at least partially covered by a layer of the cured coating material. One embodiment of an apparatus according to the invention for coating a plurality of semiconductor devices comprises a mold housing having a formation cavity arranged to hold semiconductor devices. The formation cavity is also arranged so that a curable coating material can be injected into and fills the formation cavity to at least partially covering the semiconductor devices.

The invention discloses a jetting glue dispensing valve device and a jetting glue dispensing method. The jetting glue dispensing valve device comprises a jetting glue dispensing valve, a glue supply pipeline and a glue supply valve, wherein a turntable capable of being closed / opened quickly is mounted at the bottom of the glue supply valve. During a glue jetting course, the glue supply valve is closed, and a channel allowing a glue solution to flow back to the glue supply valve from the glue supply pipeline is intercepted, so that glue jetting with precise volume is achieved. After a single glue jetting course is finished, the glue supply valve is opened, and the glue supply channel is opened for filling, so that continuous jetting of the glue solution is achieved. When the device and the jetting glue dispensing method are used for glue dispensing, no backflow occurs, so that an effective utilization rate of striker movement is increased, and jetting of a high-viscosity glue solution is facilitated; the device is simple in structure and easy to process; the turntable has the characteristic of periodic rotation, and can stir the glue solution, so that precipitation of fluorescent powder in the glue solution is avoided effectively; the fluid velocity in the jetting glue dispensing valve is distributed more uniformly; and the glue dispensing quality is ensured.

The invention discloses a remotely-excited fluorescent polycarbonate composite material and a preparation method thereof. The remotely-excited fluorescent polycarbonate composite material is prepared from 93 to 99 parts of polycarbonate, 0.5 to 1 part of an organosilicone photodiffusion agent, 3 to 5 parts of fluorescent powder, 0.2 to 0.4 parts of an anti-oxidant, 0.1 to 0.2 parts of a lubricant and 0.3 to 0.5 parts of a light stabilizer. The preparation method comprises the following steps of 1, uniformly stirring the organosilicone photodiffusion agent, the anti-oxidant, the lubricant and the light stabilizer by a high-speed mixer, 2, putting polycarbonate and the uniform mixture obtained by the step 1 into the high-speed mixer together, and carrying out uniform stirring, and 3, adding the uniform mixture obtained by the step 2 into a twin-screw extruder in a main feeding way, adding the fluorescent powder into the twin-screw extruder in a side feeding way, and carrying out extrusion granulation to obtain the remotely-excited fluorescent polycarbonate composite material. The remotely-excited fluorescent polycarbonate composite material can be used for preparation of a LED lampshade. The LED lampshade has a certain distance from a LED luminous chip so that the fluorescent powder is excited remotely. The remotely-excited fluorescent polycarbonate composite material has stable performances and uniform color temperatures, and greatly prolongs a LED lamp service life. The preparation method has the simple processes.

The invention discloses a white light source based on laser. The white light source based on the laser comprises a laser device and an optical fiber used for transmitting the laser. One end of the optical fiber is connected with a light-out port of the laser device in a coupling mode. A luminous portion is formed on the optical fiber after the luminous portion receives light leak processing. A fluorescent powder layer is arranged on the outer surface of the luminous portion and is capable of modulating the colored laser to a white light ray and emitting the white light ray. The white light source can emit the white light which is even in color temperature, and the displaying index of the white light is equal to or bigger than 70. The laser has good directionality and can be conveniently led into the optical fiber to achieve long distance transmission. Therefore, the white light source based on the laser is suitable for being applied to the medical lighting field and the vehicle-mounted lighting field for factories and mines and other light fields. Meanwhile, through the optical fiber transmission technology, the laser device can be separated from fluorescent powder, so the problem of decreasing of luminous efficiency due to the fact that fluorescent powder is heated is effectively solved.

There is provided a display device including a display unit having pixels, each of which includes a luminescence element for individually emitting light depending on a current amount and a pixel circuit for controlling a current applied to the luminescence element according to a picture signal, scan lines which supply a selection signal for selecting the pixels to emit light to the pixels in a predetermined scanning cycle, and data lines which supply the picture signal to the pixels, the pixels, the scan lines, and the data lines arranged in a matrix pattern, the display device including: a luminescence amount detector for inputting a picture signal with a linear characteristic to detect a luminescence amount from the picture signal; a luminescence time calculator for calculating a luminescence time for the luminescence element based on the luminescence amount detected by the luminescence amount detector; a luminescence time recorder for recording the calculated luminescence time; a luminance acquirer for acquiring luminance information of the luminescence element by use of the luminescence time recorded in the luminescence time recorder; a coefficient calculator for calculating a coefficient by which the picture signal is multiplied, based on the luminance information acquired by the luminance acquirer; and a coefficient multiplier for multiplying the picture signal by the coefficient calculated by the coefficient calculator.

A light-emitting-diode backlight device includes a light source substrate to which many light-emitting diodes are mounted, and a bottom chassis having the light source substrate mounted to a principal surface side of the bottom chassis. Illumination light from the light-emitting diodes is supplied to a display panel unit. A back-surface side of the bottom chassis is provided with a heat-dissipating unit making uniform a temperature distribution over the entire bottom chassis. The heat-dissipating unit includes a mounting plate, a heat pipe, and a radiating fin. The mounting plate is mounted to at least a high-temperature area of the bottom chassis. The heat pipe is disposed on both the high-temperature area and a low-temperature area, and is mounted to the mounting plate. The radiating fin is mounted to the low-temperature area, and connected to an end of the heat pipe.

The invention discloses a white LED device of uniform illuminant color temperature at the spatial solid angle and a packaging method of the LED device. The white LED device comprises an LED support with a reflector lamp cup, the reflector lamp cup is internally provided with an LED chip, and a rotary table structure is arranged on the LED support; and the rotary table structure is formed by fitting a lower layer planar concave lens layer and an upper layer planar convex lens layer. The invention also provides a packaging method of the white LED device. The planar concave lens layer is conducive to increasing the light emitting divergence angle of the LED, and the inverted planar convex lens is also conducive to increasing the light emitting divergence angle of the LED, so that white light which is highly uniform in the divergence angle range of a stereo space can be obtained; and the lower-layer planar concave lens layer and the upper-layer planar convex lens layer can be packaged by high-refraction silica gel and low-reflectivity silica gel respectively, and the gradient index structure from the chip to the external air layer is conducive to improving the extraction rate of emitted light of the white LED device.

This invention relates to a package structure of light-emitting semiconductor components including a base, a light-emiting semiconductor component, a a phosphor powder colloid fixing structure and a phosphor powder colloid cover, in which, the semiconductor component is set on the base, the highly transmitted phosphor powder colloid fixing structure is set on the base surrounding the component and opened with an opening on the top and the colloid is filled into the structure through the opening to cover the light emission semiconductor component to form a cover of the phosphor powder colloid.

The invention discloses a backlight adjustable light display device, which comprises a box body, wherein a plurality of light sources connected to an electric control device are distributed on a backlight board at the back of the box body; a light-transmitting panel is arranged in the front of the box body; the light sources include multiple groups of branches which are distributed orderly; each branch is formed by connecting at least two light sources and an adjusting module in series; and the various groups of the branches are mutually connected in parallel and are connected to the electric control device, wherein the adjusting modules are adjustable resistors or capable of adjusting current or PWM (pulse width modulation) of the branches by virtue of chips; and the light sources are LED light sources. Compared with the prior art, the light display device disclosed by the invention can improve the service life of a backlight, and can synchronize luminance attenuation of the various light sources by virtue of the adjusting modules added in the branches, so that the problem of the prior art which is asynchronous in luminance attenuation is solved; by regulating the current, voltage or WPM of light-emitting elements in the branches, brightness and color temperature are uniform and change in darkness is avoided after newly installing and changing the light sources. The light display device is applicable to all light box advertising and soft membrane ceiling box bodies.

A light emitting diode (LED) is disclosed comprising a plurality of semiconductor layers with a first contact on the bottom surface of the semiconductor layers and a second contact on the top surface of the semiconductor layer. A coating is included that comprises a cured binder and a conversion material that at least partially covers the semiconductor layers, wherein the second contact extends through the coating and is exposed on the same plane as the top surface of the coating. An electrical signal applied to the first and second contacts is conducted through the coating to the semiconductor layers causing the LED to emit light. In other embodiments first and second contacts are accessible from one side of the LED. A coating is included that comprises a cured binder and a conversion material. The coating at least partially covers the semiconductor layers, with the first and second contacts extending through the coating and exposed on the same plane as a surface of the coating. An electrical signal applied to the first and second contacts is conducted through the coating to the semiconductor layers causing the LED to emit light.

The invention discloses a white LED device of uniform illuminant color temperature at the spatial solid angle and a packaging method of the LED device. The white LED device comprises an LED support with a reflector lamp cup, the reflector lamp cup is internally provided with an LED chip, and a rotary table structure is arranged on the LED support; and the rotary table structure is formed by fitting a lower layer planar concave lens layer and an upper layer planar convex lens layer. The invention also provides a packaging method of the white LED device. The planar concave lens layer is conducive to increasing the light emitting divergence angle of the LED, and the inverted planar convex lens is also conducive to increasing the light emitting divergence angle of the LED, so that white light which is highly uniform in the divergence angle range of a stereo space can be obtained; and the lower-layer planar concave lens layer and the upper-layer planar convex lens layer can be packaged by high-refraction silica gel and low-reflectivity silica gel respectively, and the gradient index structure from the chip to the external air layer is conducive to improving the extraction rate of emitted light of the white LED device.

The present invention is directed to the provision of an LED light source that can easily adjust its chromaticity and a chromaticity adjustment method for such an LED light source. More specifically, the invention provides a chromaticity adjustment method for an LED light source having an LED device, a phosphor which absorbs a portion of light emitted from the LED device and emits light by wavelength conversion, and a resin material containing the phosphor and disposed so as to enclose the LED device, wherein an ink coating layer is disposed on a surface of the resin material in order to adjust chromaticity; the invention also provides an LED light source adjusted in such a manner.

The invention discloses an RGBW color-mixing light-guide column comprising a column body. A light-transmitting block for emitting light is arranged at the top of the column body; an RGBW four-color LED is arranged at the bottom of the column body; and an inclined surface having an inclination angle is arranged at the side of the column body. The sizes of the column body decreases gradually from the top to bottom. Transparent bead bodies for light refraction are arranged inside the column body, wherein the refractive index of the column body is different from that of the transparent bead body; and the transparent bead bodies having shapes like ellipsoids are distributed inside the column body in a manner of spaced horizontal placing and vertical placing from top to bottom. One end of the light-transmitting block is connected with the column body and the other end is provided with a micro-compound eye for emitting light. Multi-color light emitted by the RGBW four-color LED enters the column body and then are reflected and refracted by the transparent bead bodies by multiple times; and when light is emitted out of the column body, secondary light mixing is carried out by the micro-compound eye at the light-transmitting block. Therefore, light mixing becomes uniform and the market need can be met.

The invention discloses a white light source based on a laser, an optical fiber and a light-emitting component, and a light-emitting component manufacturing method, and relates to a white light source and the manufacturing method of a light-emitting component thereof. The manufacturing method of the light-emitting component comprises the following steps of: firstly, etching or engraving the optical fiber, and then solidifying and coating fluorescent powder on the surface of the etched or engraved optical fiber. The white light source based on the laser, the optical fiber and the light-emitting component comprises the laser, the transmission optical fiber and the light-emitting component; the laser is connected with the light-emitting component via the transmission optical fiber. The white light source reduces the loss of light beams during the transmission from the transmission optical fiber to the light-emitting component, facilitates the realization of a linear light source, can separately allocate the laser and the light-emitting component, can install the light source flexibly, ensures that the light-emitting efficiency of the light-emitting component will not be affected by the heat dissipated by the laser, solves the problem that heat dissipation affects light-emitting efficiency, and improves the light-emitting efficiency of the light source, thus the light beams emitted by the light source have uniform color temperature and a high color development index.