LED light source capable of emitting light from all angles

An LED light source which emits light from all angles, comprises a support 1, a chip 2 and a wavelength conversion layer 3, the support comprises a planar main body 11 and two pins 12, the chip is provided on the upper surface of the planar main body and is connected with the pins through bonding wires 4, and the wavelength conversion layer covers the planar main body, such that the chip is encapsulated in the wavelength conversion layer, and the pins are connected with an anode and a cathode of a power supply respectively. As the LED light source has a transparent back surface light can be emitted from the back and the front of the device. As a reflector cup is no longer required to direct the light, a thicker wavelength conversion layer can be used. In one embodiment a colloidal supporting layer 5 is used which does not contain fluorescent powder. A further transparent protective layer 6 may be included which may comprise silica gel, silicon resin or epoxy resin.

LED light source capable of emitting light

Preparation method for high-purity molybdenum trioxide used for hydrofining catalyst of petroleum

The invention relates to a preparation method for high-purity molybdenum trioxide used for a hydrofining catalyst of petroleum, and the method comprises the following steps: carrying out box drying on ammonium tetramolybdate at the temperature of 75-85 DEG C for 18-20 hours, and placing in a sealed packaging bag for 7-10 days; screening dried ammonium tetramolybdate with a 40-mesh screen, and acquiring a screen undersize material; analyzing the contents of molybdenum and impurities in ammonium tetramolybdate used for preparing the high-purity molybdenum trioxide; conveying the treated ammonium tetramolybdate to the furnace end of a rotary tube electric furnace using a screw feeder, and dividing the rotary tube electric furnace into five zones, wherein the temperatures of the five zones are 470+/-5 DEG C, 490+/-5 DEG C, 510+/-5 DEG C, 490+/-5 DEG C, and 470+/-5 DEG C respectively; baking while controlling the rotation speed of the screw feeder at 20-23 Hz and the rotation speed of the rotary ...

High-strength Mo-doped sheet and preparation method thereof

The invention relates to a high-performance Mo-doped sheet and a preparation method thereof. The preparation method comprises the following steps of: carrying out the high-energy ball milling of MoSi2 with one of Y2O3 and CeO2 or two of Y2O3, La2O3 and CeO2 or a mixture of the Y2O3, the La2O3 and the CeO2 to prepare MoSi2/rare-earth oxide ultrafine composite particles; then, doping the ultrafine composite particles with the ultrafine molybdenum powder in a ratio of 0.1-3 percent by weight; preparing an Mo5Si3/rare-earth composite particle strengthened molybdenum sheet blank by adopting a powder metallurgy method through mixing, pressing and sintering procedures; and finally, obtaining the needed sheet through great-deformation rolling. The Mo-doped sheet produced by using the method has excellent high-temperature and room-temperature strength, can reach the room-temperature tensile strength of 921 MPa, the anti-bending strength of 1674 MPa and the tensile strength of 558.7 MPa at 1000 DEG ...

Blind aid system based on infrared sensing geometrical characteristic recognition

The invention discloses a blind aid system based on infrared sensing geometrical characteristic recognition, comprising a trolley body, a singlechip, an infrared sensor module, a voice prompt module, a power module and a manual control module, wherein the infrared sensor module is used for detecting the distance between the trolley bottom and the ground, distinguishing a striped go-ahead blind sidewalk and a dot-shaped prompt blind sidewalk according to the compared feedback information of an obtained result and transmitting the result to the singlechip; the singlechip is used for processing the blind sidewalk surface geometrical characteristic information detected by the sensor module so as to recognize the prompt blind sidewalk and the go-ahead blind sidewalk, and then dynamically adjusting the motion state of the trolley according to the recognized prompt blind sidewalk and go-ahead blind sidewalk result; the voice prompt module is used for carrying out voice prompt on the condition ...