An ordinary fluorescent:
Fluorescent ends of each filament, the lamp is filled with a trace amount of argon and thin mercury vapor lamp on the inner wall coated with fluorescent powder, emits ultraviolet light when gas conductivity between the two filaments, phosphors issue of soft visible light.
Fluorescent work characteristics: led light tubes ignited requires a high voltage, the small current is allowed only through the normal light, when the voltage across the lamp is less than the supply voltage.
Fluorescent tubes equipped with filament ends, the glass tube wall is coated with a thin uniform layer of fluorescent powder, and charged into a small amount of an inert gas after the tube has been pumped into the vacuum 10-3-10-4 mmHg also injection Trace of liquid mercury . The inductive ballast is an iron core inductor coil, the nature of the inductor when the current in the coil is changed, the change of the magnetic flux in the coil will cause, thereby generating an induced electromotive force, direction and current of the opposite direction, thereby preventing forward current changes.
Starter switch in the circuit from it by a neon gas discharge tube and a capacitor connected in parallel, the capacitance of the role for the elimination of electromagnetic interference on the power supply and forming an oscillation circuit with the ballast, to increase the start-pulse voltage amplitude. The discharge tube an electrode composition, the use of double metal sheet discharge heating neon bulb, the bimetal in the opened or closed, causing the current mutation of the inductive ballast and generates a high voltage pulse is applied across the lamp.
When the led light tubes access circuit, began to glow discharge between two electrodes QiHuiQi from bimetal thermal expansion of the pole contactors with quiet touch, so the power supply, ballast, filament and starter form a closed loop, the current so that the filament preheating, when the heating time of 1-3 seconds, the discharge between two electrodes of a glow QiHuiQi extinguished, followed bimetal cooled very disconnected with the stationary contact, when disconnected from the two electrodes of the moment the current in the circuit suddenly disappeared, so ballast generates a high voltage pulse, which superimposed power supply, applied to the tube ends, so that the lamp and the inert gas ionization caused by arc discharge, in the normal light emitting process, the town The self-inductance of the converter also plays the role of the current stabilizing circuit.
Second, LED fluorescent light:
LED fluorescent lamp as the main characteristics of high quality, durable, energy-saving, large projection angle adjustment range, brightness equivalent to ordinary 40W fluorescent 15W. Resistance to high temperatures, moisture-proof and waterproof, leakproof. The use of voltage: 110V, 220V optional cover optional glass or PC material. Lamp with ordinary fluorescent lamp.
LED fluorescent light using the latest LED light source technology, digital design, saving up to 70%, 12W LED fluorescent light intensity equivalent to 40W fluorescent tubes (for ballast and starter 36W fluorescent real consumption power for 42W to 44W). Life LED fluorescent the ordinary lamp 10 times, almost maintenance-free, and obviates the need to replace the lamp, ballast, starter. Green semiconductor electric light, soft light, pure spectrum, is conducive to the protection and the health of the user’s vision. 6000K cold light source gives visually cool feeling, human difference in illumination design, helps to concentrate and improve efficiency.
LED fluorescent lamps and led light tubes contrast, the following advantages:
1, energy saving. 2, long life. 3, good applicability, due to the small size of a single LED, can be made into any shape. The response time is short, ns (nanoseconds) level of response time, ordinary lamps ms (millisecond) response time level. 5, environmental protection, no harmful metal waste recycling easy. 6, colorful, luminous color pure, narrow spectral range and through the three primary colors of red, green and blue color mixing into a colorful or white.
Disadvantages: expensive. 2, can generally be done in light efficiency and theoretical light efficiency there is a big gap. 3, can do the life and theories of life (10w), there is a big gap. 4, there are still a certain amount of heat. 5, the light fades can be significantly reduced.
However, these shortcomings can be overcome through process improvements, so even if the LED light source can not completely replace existing traditional light sources, but with the development of technology, the future must be LED in the world.
