日期：2012年7月18日

street solar lighting in LED machine

The jetting, belongs to the new led lights technology, which uses a nozzle alternative to syringes, to solve many problems. Jetting nozzles needed to fill the bottom of the device above the dispensing need to reach their location below the top (street solar lighting). Jetting nozzles in the entire circuit board side along the x and y directions, without the need for vertical movement.

street solar lighting in LED machine

And dispensing syringe, the nozzle does not form a continuous bottom-filling glue flow, and replaced every second jet more than 200 points after accurate measurement of the gel-point. With the move of the nozzle level, the gel-point can be the formation of linear and pattern of a variety of needs, the solid line, dotted line and a variety of other different graphics. Each jet by precise control of a jet formed by the gel-point minimum diameter of up to 0.33mm, for coating plastic patch area into the precise control of occasions is very important.

 

Injection technology is the glue from the nozzle at a faster rate, rely on glue momentum to make glue out of the nozzle. Each jet  (street solar lighting) will spray out a certain amount of glue. Common injection frequency is 100 Hz to 200 Hz, but will soon reach 1000hz. , There are several different jet dispensing needle dispensing. When the glue from the nozzle, before the glue in contact with the substrate and the separation nozzle. Each of the gel-point injection into the substrate to form points, lines, and graphics. In the dispensing position during the move, the dispensing head is not the movement of the Z-axis direction, thus saving a considerable amount of time. Needle dispensing robot in the X, Y, Z axis movement, glue flow from the needle out of contact with the substrate, relying on gravity and the substrate surface tension glue isolated from the needles. After the completion of each dispensing, a movement along the Z axis, and then move to the next dispensing position.

The LED products market is also benefiting from the spray adhesive technology. Spray adhesive process can spray a wide range of optical materials including silicone, UV curable conductive adhesive of the phosphorus doped in the high-speed dispensing position and precise dispensing and plastic volume control. The accuracy of the spray adhesive can improve the yield of high-value high-power LED street lights devices. Applied to the white light  (street solar lighting) production, phosphor powder and mixed glue dispensing, its consistency is a good improvement.

street solar lights in LED lumen

Increasing LED lights brightness can be broadly divided into two types, one is to increase chip itself, the amount of light emitted; Another method is the effective use of the light generated by the chip, increasing the exposure of the light irradiation to the expected direction.

street solar lights in LED lumen

The former is trying to improve the luminous efficiency of the chip active layer, as well as to improve the chip shape to increase the external light extraction efficiency, or chip, large-scale use of high current density to increase the amount of light emitted; the latter is the use of light wave control technology, that is, the package resin to form a special optical structure, the chip produced by light irradiation to the expected direction. If the LED (street solar lights) screen brightness of less than the expected value, you can also try using the following methods to improve the brightness after use.

(1) Changing the flow through the LED current, general LED tube  (street solar lights)  to allow continuous current at 20 mA or so, in addition to the red LED saturation phenomenon, the other LED brightness is basically proportional to the current flowing through.

(2) the use of the human visual inert gray scale control pulse width modulation method to achieve, that is, cyclical changes in the optical pulse width (duty cycle), as long as this repeated cycle of light is short enough , the human eye do not feel light-emitting pixels in jitter. LED display to provide a pulse width modulation is more suitable for digital control, so in general the use of computer content, almost all of the LED control system is usually composed from three parts of the main control box, the scanning plate and the display and control device. The main control box from the computer’s graphics card to obtain a screen pixel colors and brightness information, and then re-allocated to a number of block scanning plate, each scanning the board responsible for controlling the LED screen on the number of rows (columns), and each row (column) on the LED display and control signal with the serial transmitted. There are two serial transmission of control signals: one is to scan the board centralized control of each pixel grayscale scanning plate from the control box of each line of pixel brightness value decomposition (Pulse Width Modulation) then the opening of the line LED signal  (street solar lights)  pulses (light does not shine to 0) to the corresponding LED on the line with serial transmission, control whether the light. Used in this way the device is less, the serial transmission of data in a repeating cycle of light, each pixel requires 16 pulses in 16 gray, 256 gray scale needs 256 pulses, the device operating frequency limit, generally only the LED lights screen to do the 16 gray.

DOE: LED lighting products will be the most environmental friendly in the world

From a recent report published by Department of Energy (DOE), LED lighting products will be the most environmental friendly in the world. The most significant difference between LED lamps and traditional filament lamps is the degree of the impact on the environment. This report classified lighting industries as 5 levels in terms of environmental contamination or environmental effect. Among all kinds of lighting products, LED lights have been listed in level 5. “It is the last product that will cause damages to our environment.”

DOE: LED lighting products will be the most environmental friendly in the world

In another article named “The Manufacture and Effect of LED”, the author compared three different lamps (Filament Lamps, Compact Fluorescent Lamps and LED Lamps) in aspect of service life, production process and operation conditions. This report did a comprehensive study for the effects impacted by these bulbs during their packages, transportations, works and recycles. This is also the first report that discussed LED lighting products officially. DOE always spent a lot of energy on environment protection, especially for air and water sources, to maintain the international competition of the United States. There is another important reason: to save loads of money for families and companies.

 

“Review of the Lifecycle Energy Consumption of Incandescent, Compact Fluorescent and LED Lamps” is a conclusion mentioned in DOE’s last report. In this report, DOE continued to use this conclusion and summarized more concrete and detailed estimation.

 

This report suggested that traditional Compact Fluorescent Lamps (CFLs) was much similar with LED lamps in the aspect of energy consumption. Both of them consumed less energy compare with Filament lamps in manufacture, transportation and operation. Due to the high efficiency, 15W CFLs are equivalent to 60W Filament lamps. This report conducted totally 15 tests. 14 of them showed that LED lighting products will be the most environmental friendly among these three types of lamps.

 

In particular, LED lamps have a poor performance in recycling part. The majority of LED lamps are made of aluminum alloy, which will exert a significant effect on the earth after scrap and bury. Even so, LED lamps are still more superior than Filament Lamps and CFLs. DOE gave out several solutions for this problem and decided to improved the production process of LED lighting products to improve this situation.