LED oled modules Driver-based knowledge

LED according to the application can be divided into lighting, backlighting and display three categories. Most of the LED driver circuit are all following topology types: buck, boost, buck - boost, SEPIC and flyback topologies. In order to achieve a more efficient LED lighting, a new topology to provide solutions, can give full play to the advantage of the zero-voltage switching the topology (ZVS) resonant half-bridge topology, the shift from the flyback topology. In addition, there is a simple current limiting resistor or linear regulator to drive the LED, but such methods are usually wasted too much power. LED lighting applications, the main design challenges include the following aspects: heat, high efficiency, low cost, flicker-free dimming, dimming, reliability, safety, and the elimination of a wide range of color cast. These challenges requires the integrated use of appropriate power system topology architecture, driver circuit topology and mechanical design can be resolved.graphic lcd display module 
Regardless of how the output power of the LED lighting system, the LED driver circuit of the selection will depend largely on the input voltage range, LED string itself the accumulated voltage drop, and is sufficient to drive the desired LED current. This has led to a variety of different possible LED driver topologies such as buck, boost, buck - boost and SEPIC type, flyback resonant half-bridge topology. Each topology has its advantages and disadvantages.lcd graphic display modules