Brief introduction LED light filament 10 kinds of innovative technology
2017-05-22 11:31:37
In 2013, there were only 2 exhibitors to show LED filament lights. In 2014, more than 50 LED lighting companies exhibited all kinds of LED filament lamps. At the end of October 2014, Hong Kong HKTDC's international LED light show was close 200 companies show LED filament light; the spring of 2017, the national design and production of filament lamp business has reached more than 2,000
LED filament lamp In recent years, from the market demand for the rapid heating of the heat, the international market for technological innovation LED filament quickly recognized, the market demand doubled. As the technical threshold to enter the production of LED filament lamp is not high, the current production of LED filament enterprises such as the emergence of rain, cohabitation led to the uneven quality of LED filament lamp, LED filament and LED filament light easily done but it is difficult to do!
LED filament lamp with its slender LED filament shine when the traditional incandescent lamp and won the nostalgic people love and sought after. LED light filament light brightness, efficiency and shape is equivalent to ordinary incandescent, people in use to find back is about to lose, has been accustomed to incandescent light environment.
LED filament lamp with HVLEDs innovative technology
LED filament lamp with high voltage, low current HVLEDs innovative technology, filament lamp in the light when the work is only given 10-15mA small current drive can light, with the traditional low voltage, high current LED bulb 300-700mA drive current Compared to the same unit area of the LED tube instantaneous heat greatly reduced, with HVLEDs technology designed lighting can be light and not hot. The traditional 5W LED bulb lit when the lamp bottleneck temperature up to 75-95 ℃, while the same power LED filament lamp, lit 8 hours later, A60 glass bubble temperature below 36 ℃. LED filament lamp can achieve real safe use. The derivation of electronic products The use of design techniques is an effective means of extending the life of electronic products.
The current technical design, production 4WLED filament lamp lumens up to 400LM-520LM, equivalent to 40W-50W incandescent brightness, light efficiency up to 100-130LM / W.
LED filament products are limited to A60 bulb and C35 candle bulb, pull the end of the bubble, their internal space is very small, need limited capacity of the special gas and glass bulb thermal, heat, the current frame structure and glass bubble space only Suitable for 5W below the low-power light bulbs in order to ensure that LED filament light for a long time to light and not hot.
The key technology of LED filament design
LED filament light of the key technologies are: LED filament design and manufacturing technology, filament glass bubble bubble row technology, no flash constant current drive power technology. These key design, manufacturing technology are filament lamp manufacturers must be concerned about and have.
The key technology of LED filament design involves the following:
1, color temperature regulation (yellow phosphorus phosphor + pink powder);
2, blue light leakage (all yellow phosphorus phosphor wrapped);
3, pin design (to eliminate soldering, pin with occlusal technology);
4, LED chip area and power (small area, low power);
5, LED chip light angle (no back plating chip to achieve 360 degrees light);
6, filament working state design (HVLEDs, VF high voltage, small current, full string);
7, filament shape design (thin and long);
8, filament working voltage design (consider the whole lamp system efficiency);
9, filament working current design (A604W the whole light lit 8 hours glass bubble is not hot);
10, in line with the glass bubble sealing technology needs (for instantaneous high temperature).
LED filament is one of the core technology of filament lamp, LED filament technical parameters and quality, involving LED filament brightness, color temperature, refers to the meaning and life, hot and cold lumens ratio.
LED filament manufacturing technology is currently the traditional packaging with the "solid crystal technology" and just the rise of "flip chip technology." Solid crystal technology needs to play gold, flip chip technology that is used flip chip LED, as ordinary electronic components as patch, can be reflow soldering. Production process is different, the production cost is different. In this paper, solid crystal technology as an example.
LED lights should be no strobe
No flicker is the basic requirement for good LED light source and fixtures. A flashing light source will cause rapid eye fatigue, affecting the health of human eyes.
LED light source and lamp strobe mainly from the poor drive power supply, such as RC capacitive power supply, ripple high switching power supply. Check and judge whether the LED light source and the fixture are flashing? Simple way to use everyone can have a simple tool to open the camera's camera and camera functions, electronic viewfinder that lens alignment to observe the LED light source, framing screen accounted for more than 2/3 of the phone screen area, especially for the LED Light source close observation, such as mobile phone LCD screen to see the light source has obvious black stripes rolling or shades of change. Strobe is the frequency of flashing, is a cyclical repetitive flash, including visible strobe and unobtrusive high frequency strobe. 50Hz-200Hz low frequency flash is human can see the naked eye, for children and young people may be very sensitive, easy to make eye fatigue.
Do the power to go to plastic parts
Do the LED filament switch constant current drive power can remove the early filament lamp to cover the lamp within the power of the height of the white plastic parts, foreign market customers are required to remove the plastic parts, so that the filament lights more like incandescent.
A new generation of LED filament special switch constant current drive power chip, integrated more LED filament lamp need to switch constant current drive power required for a variety of electrical performance and protection functions, has a very good price.
To the automation to productivity
Pin with occlusal technology
In view of the LED filament glass bulb row of the process has a second instantaneous high temperature (800-1000 ℃) process, LED filament pin can not use soldering, must use the occlusal technology pin, so as to ensure that the glass bubble Bubble in the process of yield.
The solder is an alloy consisting of tin (melting point 232 ° C) and lead (melting point 327 ° C). A solder consisting of 63% tin and 37% lead is called eutectic solder, and the melting point of this solder is 183 ° C. So spot welding in the filament lamp column on the LED filament in the package process encountered an instant high temperature environment, the solder will occur twice the melting, resulting in solder joint collapse and false welding, filament lamp in the row after the lamp may be normal light , But after the shipment of the vibration, the Welded off to the client may be off. Bite the technology pin is a special pin design, pin and transparent base of the combination, not by silver resin or solder connection, but the use of physical clamping on three sides of the pressure connection, not affected by high temperatures, Production practice has proved to be the most scientific and effective way to connect. The use of bite technology pin LED filament in the glass bubble row of the process can not occur due to high temperature LED filament lead Weld situation
For the LED light source and fixture strobe, the United States in the IEEEPAR1789 "LED lighting flashing potential health effects" in the interpretation of the stricken dangers. Therefore, LED light source and lighting should not be strobeed.
Blue light leaked
LED lighting and light fixtures are not allowed to have blue light leakage. To ensure that the LED light source and the lamp is not Blu-ray discharge is the conscience of every entrepreneur and engineer responsibility and play; to eliminate LED light and light blue light discharge, but also the basic guarantee of product quality.
If the LED filament only in the upper and lower sides coated with yellow phosphorus phosphor, then the left and right sides of the cut surface will have a blue discharge. Some filaments in the production of the row of coated yellow phosphorus phosphor and then the base of the laser cut, transparent base on both sides of the coating is not yellow phosphorus phosphor, blue light will follow the edge of the transparent base leakage.
LED filament lamp will be a kind of people around the world can afford affordable LED lighting source, LED filament lamp will be a universal can use and sell the blue ocean products, LED filament lamp should be a good cost-effective consumer electronics products, Therefore, automated production is a key means to reduce product costs, to the automated production to productivity. For this innovation research and development success "LED filament automatic spot welding machine", "filament lamp block one machine", "automatic glue machine", "automatic head welding machine" and other automated production equipment (Figure 9). All the production process of the most expensive cost should be artificial, so LED lighting industry is bound to move to automation, to the production of automation to rely on automation to save production costs.
