LB-PM3030-GJD2P5500612AG82 AOC Led Backlight Lamps - 55inch Tv Spare Parts

1. 1:1 as original connectors

2. Original Korea lens

3. 1 OZ Aluminum PCB with V wear exposure technology

4. The lamp is 3V, power 1W, use 3030 EMC bracket

5. Original code:  

LB55040 M30900 16V0 94V-0

LB-PM3030-GJD2P5500612AG82

6. Quality warranty is 1 year, we refund fully there's any problem with the led strip lights

LED lights are becoming more and more common now. In many places, LEDs are used to replace some traditional lights, and LEDs can be well controlled and can present various colors we want. Of course, LED extension products are also becoming more and more popular. For example, there are more and more LED backlight TVs. Of course, LED backlights will also fail. What should I do if this fails? Good for repairs.

AOC Backlight Led Strip For TV Principle:

LED linear constant current drive circuit

LED lights need multiple lamp beads connected in series or in parallel to work. Although the voltage required to drive multiple LEDs in parallel is low, the forward voltage drop of each LED is different, so that each LED brightness of the EDs is different, unless a separate adjustment is used to ensure that each LED has the same brightness. Therefore, it is more complicated to realize the parallel mode to ensure uniform brightness. The series connection method can ensure that the current flowing through each LED is the same, and the degree is consistent, which is a commonly used structure at present.

In order to ensure the constant brightness of LED, we need constant current power supply.

The working principle of the constant current power supply is to sample the output current and feed it back to the regulating tube or op amp to change the conduction state, so that the ratio of the loop voltage and the resistance is constant, so that the current is constant.

A constant current source is a current source whose output current remains constant, and an ideal constant current source is:

a) Does not change due to load (output voltage) changes.

b) Does not change due to changes in ambient temperature.

c) The internal resistance is infinite.

We know that the collector current of the triode is determined by the base current when the transistor is working in the amplifying area, that is: R1 is connected in series with the diode to provide a stable bias voltage to the base, using the emitter resistor Rvi- On the one hand, the current can be adjusted, and on the other hand, it has a negative feedback effect, which makes the output current more stable.

This is a simpler circuit, and a more complex circuit can only provide more stable and larger current, and the principle is similar.

Click AOC Backlight Led Strip For TV  to contact us.