The Development Of LED Filament Lamp
LED filament lamp adopts high voltage HVLED and small current driving technology, and innovates the design technology of LED light source and lamp.
The technical threshold of LED filament lamp is not high, plus our strong promotion, the inclination to popularize the LED filament lamp design and manufacturing technology, the incandescent bulb factory and the consumer electronics factory all over the world are easy to join in the production of LED filament lamps. The world needs 9 billion incandescent lamps in the world. The LED lamps with energy saving and electricity saving can completely help upgrade the incandescent lamp and meet the needs of the world market.
The core technology of LED filament lamp is LED filament and constant current power chip. At present, LED filament lamp is composed of rigid straight wire filament LED constant current drive power + + + + stem glass glass bulb lamp ". In 2017, will this standard mode be overturned? The new generation of ceramic arc LED filament, metal base, LED filament, metal based IC filament and flexible LED filament with arbitrary bending shape have been born. And enter the industrial production.
Metal based IC filament may make the filament lamp save the current constant power supply, and it may also change the filament layout design of filament lamps. The LED filament lamp directly driven by AC without AC/DC power is also developing. A new technological revolution of LED filament lamp is going on quietly.
Arc filament and graphene filament
The light distribution curve of straight filament LED filament lamp is butterfly spot, and the straight filament LED filament lamp is opened. The dark area will appear in the middle of the lamp, and it will be bright around. The distribution curve of arc filament LED filament lamp is full moon shape, and there will be no dark area below arc filament and LED filament lamp.
The metal cornerstone filament filament is a binding LED lamp chip on the side of the metal substrate, coated with yellow green phosphor, making the blue light of the blue LED bulb striking the yellow green phosphor and making white light. The other side of the metal substrate is coated with graphene. Using the graphene coating, the heat from the metal substrate is quickly radiated out. The improvement of the LED filament lamp only depends on the single way of helium heat conduction and the use of glass bubbles to divert heat.
The IC filament is directly bound to the filament substrate by the constant current IC chip. The constant current IC is directly connected with the N LED bead chip on the filament substrate and becomes a new type of electronic LED filament with the current of the self controlled filament.
Due to the large dispersion of the LED beads in mass production, even if we make an effort to match the LED filament production, we can not guarantee the filament of mass production, and the VF of each one is exactly the same. A few LED filament VF, which are different, are combined in a light bulb, powered by a constant current power supply, and the VF small filament will get a little more current, and the time is long, and the VF small LED filament will have light decay first.
This is a recessive cancer of LED filament lamp at present. It is also a difficult technical problem of COB filament.
The constant current IC chip directly combined to the filament, and LED chip beads bound into a new generation of IC COB. LED filament was originally a passive COB device produced by LED packaging plant. After adding a IC constant current control chip, the IC filament made the LED filament from the passive device to a new generation of active electronic devices because of the electronization of the IC filament. LED filament can automatically control current and root flow is constant. No more demanding for VF!
Maybe the LED filament lamp eliminates the AC/DC constant current power supply. With the IC LED filament, the LED filament lamp can become the real electronic incandescent lamp.
Single channel two port constant current control IC
The single channel two port constant current control IC is a constant current power chip with high integration inside the chip. It is composed of function modules such as micromodulation, reference voltage, voltage regulator, temperature compensation, over temperature protection, current sampling, operation and amplifier, constant current control, and MOS. It is simple to use. It can directly drive high voltage LED string without debugging and sampling resistance. The application line is very simple.
The chip is internally limited constant current, fixed output 10mA, 12mA, 20mA and 30mA current. The chip has a built-in 600V MOS. There is no EMI problem in the application line. Built-in over temperature protection. Application of IC filament is very convenient, can be HVLED by the N LED constant current filament lamp series chip. It can also be widely applied to all kinds of photoelectric engines.