Mingshang Optoelectronics teaches you 3 ways to judge the quality of LED beads

Let's conduct an experiment to see what voltage is needed to light up this LED bead. First, we will demonstrate the first method to determine whether it's good or not: using our multimeter. We set it to the diode range. These beads are all LEDs. For the multimeter, the red probe is positive and the black probe is negative. Let's see, if it can be lit up, it proves that the diode is good, conducting in the forward direction and blocking in the reverse direction. If we hold the probes reversely, it won't light up. This is the first method.

The second method involves finding a replaced battery, which has a voltage of around 4V. Let's see, this method can also quickly detect the quality of the LED beads. If it lights up, it means the LED beads are working; if not, they are broken.

This can also be quickly tested. If it's held upside down, there will be no response. It conducts in the forward direction and blocks in the reverse direction. This is a typical diode principle, and this is how to determine whether it's good or bad. How do we determine the voltage required to light up this diode? We need to use this device

This device is quite impressive. It's specifically designed to test Pierce or frequency converters. It emits analog voltage or current signals, and it operates on DC. We use it to disguise the voltage required to light up this LED bead. First, we adjust the voltage downwards. This is a small potentiometer that can adjust the voltage, still outputting between 0 and 10V. Let's take a look at the wiring. This is the positive terminal, and this is the negative terminal.

We're just giving you a simple demonstration on the LED bead. Make sure to distinguish between the positive and negative terminals, otherwise the LED won't light up. We're currently using 0.8V DC, let's gradually increase it. Now it's 1.3V, let's see... 1.4V, gradually increasing. As you can see, the LED bead hasn't responded yet. Let's check. We didn't connect it properly earlier. Actually, it's slightly illuminated at 2.3V, 2.4V, and becomes very bright at 2.5V, 2.6V, 2.7V, and 2.8V. In other words, we can use 2.2V, 2.3V, and 2.4V, which is very practical. If you're interested, come to Shenzhen Mingshang Optoelectronic Company and let's exchange ideas and learn together.

Mingshang Optoelectronics specializes in the research, development, and manufacturing of LED backlight sources and modules, as well as high-end LED lighting source products. Its products have been widely applied in various specifications of TV backlighting and mobile tablet backlighting, as well as indoor and outdoor commercial lighting, home lighting, automotive backlighting, and other fields. The products are sold well in large, medium, and small cities in China, as well as in developed countries such as Europe, America, Japan, and South Korea, and Southeast Asian countries. With reasonable prices, excellent quality, good reputation, and comprehensive service, the company currently boasts over 50 high-quality cooperative clients and has a wide customer base.

The company continuously introduces advanced production equipment, achieving full automation of production and intelligent detection. It constantly optimizes production processes and procedures, continuously improves and enhances product quality and application value, and moves from the aftermarket industry chain to the pre-installed industry chain, providing customers with maximized products and services. The company has always been inclined towards investing in the manufacturing of high-end LED lamp beads. At the same time, the company has also increased its investment in TV and commercial display TV light bar production lines, strongly supporting the company's comprehensive business to reach new heights and jointly write a new chapter and new glory in history. While vigorously focusing on hardware investment, the company also strengthens the construction and development of soft power, continuously breaks through and achieves new results, and constantly pursues excellence and self-realization.