Practical methods to improve lighting efficiency and stability

Practical methods to improve the efficiency and stability of lighting brightness. Improve the stability of LED lighting. The brightness of LED light-emitting diodes varies with the size of the current, and the voltage and current curves of the manufactured light-emitting diodes are slightly different, so the brightness of LED lighting often varies The power supply voltage fluctuates and cannot be stabilized. In order to maintain a stable and consistent brightness, a constant current LED driver is needed to achieve it. The constant current driver can make the light emitting diode work in a fixed current mode, so the brightness stability is high. The constant current driver also allows the light-emitting diode to work under a certain current for a long time, so that it can maintain a longer life. T is a constant current driver, it is a constant current LED driver with a channel, the output current can be determined by the external resistance. T has ±% accuracy current and ±% matching accuracy between channels, and can be used for street lamps, lamp tubes and other lighting equipment. In order to save energy, the system design needs to consider the cross voltage of the constant current driver between .V and V. Since the light-emitting diode works under a constant current for a long time, its cross voltage drops slightly, this change also needs to be considered in the system design. Make LED lighting more energy-efficient. The advantages of LED lighting are energy saving and safety, but due to constant current work considerations, energy consumption is relatively increased, so the lighting system design aims at low energy consumption. As mentioned earlier, the voltage drop of the constant current driver is within V, which is to consider the design of low energy consumption. If the voltage drop of the power supply terminal of the system and the voltage drop of the series-connected light-emitting diode exceeds V or more, a voltage converter should be considered to achieve the low energy consumption goal , But still maintain constant current working mode. The low-energy voltage converter works in a switching mode, and the switching cycle is controlled by the feedback circuit to achieve a stable output voltage. But in order to maintain the constant current working state of the light-emitting diode, the feedback circuit controls the switching cycle of the converter by the output current. T is a step-down constant current LED driver. Its current is determined by an external resistor. It can support up to .A output current, provide ±% precision current and high power efficiency (low energy consumption) and high electrical circuit adjustment capabilities. Among the LED lighting products currently flooding the market, their power input systems fall into two categories: one type is AC power input system at the front end plus a constant current control module at the back end. Such products include freezer light bars, indoor lamps, street lights, Table lamp, MR, AR, etc. The other is the direct input system of AC power, which integrates AC/DC converters and constant current circuits. Such products include bulb-type LED lamps such as E and GU, PAR lamps, T and TLED tubes, etc. At present, LED lighting products must achieve high luminous efficiency and become the main light source of the next generation. The first consideration is the design of the power supply module, and the correct design framework is selected for different lighting products. In addition, power control ICs must also improve power efficiency, power factor, and reliability in order to develop products suitable for LED lighting needs. Light-emitting diodes are diodes made of semiconductor materials and consist of PN interfaces. When a forward voltage is applied, electrons and holes combine to release energy in the form of photons, so they have light-emitting characteristics. The light source is generated within a millimeter of the PN interface, and the wavelength of the light is different depending on the characteristics of the material, and there are red, yellow, green, and blue light-emitting diodes. The brightness of light-emitting diodes can be adjusted by the size of the operating voltage (current). In a large operating current range, the brightness of the light-emitting diode increases with the increase of the current. Since the beginning of the year, advanced countries such as Europe, the United States, and Japan have successively implemented laws banning incandescent light bulbs. The reason for the laws is to restrict low-luminous efficiency light sources. Incandescent bulbs are banned, and replaced by light sources including energy-saving bulbs, cold cathode tubes, LEDs, and so on. But in the future, if you consider restrictions on hazardous substances, LED light sources will become the best choice.