Solar energy lamp price 10 meters high

With the constant improvement of the efficiency and brightness of LED, the scope of its application is more and more widely. When the LED array as a display and solar street lamps 。 jschindo。 com】 Devices, due to the sensitivity of the human eye to color the wavelength and brightness, without the LED variable separation can produce

with the constant improvement of the efficiency and brightness leds, the scope of its application is more and more widely. When using light-emitting diodes as array displays and solar street lamps [ 。 jschindo。 com] Device, because of the sensitivity of the human eye to color the wavelength and brightness, when using light-emitting diodes (leds) if not classify will produce uneven phenomenon, which affects people's visual effect. The wavelength and brightness uneven can give a person a kind of uncomfortable feeling. This is the led street lamp manufacturers don't want to see, and people cannot accept. Light-emitting diodes (leds) usually test and classification, according to several key parameters such as dominant wavelength, luminous intensity, brightness, color temperature, working voltage and reverse breakdown voltage. Light emitting diode testing and sorting is a necessary process in light-emitting diode production. 一个。 Classification method classification of light-emitting diodes (leds) light-emitting diodes (leds) there are two ways: one is based on the chip testing and classification, the other is a test and classification of encapsulated light-emitting diodes. ( 1) Chip test and classification is very difficult to categorize light-emitting diode chip, mainly because of the size of the light emitting diode chip is very small, usually from 9 mm to 14 mm ( 0. 22 - 0. 35 nm) 。 Such a small chip need a micro probe to complete the test, and sorting process requires a precise machinery and image recognition system, which makes the equipment cost is high, the test speed is limited. At present, there are two kinds of chip testing and sorting methods: one way is to test and sorting work by the same machine, with high reliability, speed, and low productivity. Another way is by two machines to complete testing and sorting, testing equipment to record the location of each chip and parameters, and then to transmit the data to sorting equipment for rapid sorting. The advantage of this method is fast, but the drawback is the low reliability, easy to get wrong, because in the test and the separation between two steps usually have thinned substrate and chip separation process, and in the process of epitaxial wafer could burst, section or part of the bursts, which makes the actual distribution of chip and stored in a point. Fundamentally solve the problem of chip testing and sorting bottleneck is the key to improve the uniformity of epitaxial wafer. If the wavelength of epitaxial wafer distribution within the 2 nm, brightness changes within + 15%, then all the chips on the wafer can be classified as a Bin, as long as through test unqualified chip, chip will greatly improve the productivity, and reduces the cost of chip. In the case of uniformity is not very good, you can also use the testing and put; No more qualified products; Through inkjet coating processing chip area, thus to quickly get the chips; Qualified; Chips, but the cost is too high, so many meet the requirements of the other rooms chips will be deemed to be unqualified, finally calculate the chip cost is probably cannot be accepted by the market. ( 2) Test and classification 2) Light-emitting diodes (leds) encapsulated light-emitting diodes can be according to the wavelength, luminous intensity, light Angle and working voltage test and classification. As a result, the light emitting diode is divided into many locker and category, and then test classifier will automatically according to the test standard of setting the light-emitting diodes (leds) into different locker. Because people are more and more high to the requirement of light-emitting diodes (leds), early separator is 32 bin, then increased to 64 bin, now has 72 bin sorting machine for commercial use. Even so, bin leds technical indicators still cannot meet the needs of production and market.