Visit：2450   Date：2023-11-13

Due to the chaotic market competition of LED light beads, many businesses have resorted to vicious price wars, which makes it difficult for consumers to have little time to understand chips. The main reason is that there are no professional instruments available, and the products purchased are finished products without separate test samples. Additionally, there is a lack of knowledge about LED chips.

Firstly, we need to know what LED is? Simply put, it is a light-emitting diode. In the early years, LEDs were mainly used as indicator lights in circuits. With the rapid development of technology, LED technology is becoming more and more mature, and its application fields are gradually expanding. LED has gradually entered the lighting market and is widely used in various aspects of daily life lighting.

What are the main LED products that we come into contact with or recognize today? For example, LED televisions, LED displays, LED flashlights, and so on are the most common LED products. For the lighting industry, there are mainly LED ceiling lights, LED ceiling lights, LED fluorescent tubes, and LED panel lights that only emerged in 2012.

What are the advantages of LED compared to traditional incandescent lamps and energy-saving lamps, and can it become an inevitable product to replace traditional lighting fixtures? Main product advantages:

1、 Energy saving, electricity saving, low-carbon, and environmental protection are the main advantages of LED bead products replacing traditional lighting products. It saves about 90% electricity compared to traditional incandescent lamps and 50% electricity compared to energy-saving lamps.

2、 The styles are more diverse, and whether it's traditional incandescent lamps, traditional energy-saving lamps, or even sodium lamps and other lighting products, they can only stay in the appearance stage of light bulbs and tubes to this day. There are various forms of LED lamp beads nowadays, which not only cater to the traditional LED bulb lamps and LED fluorescent tubes produced by lighting fixtures, but also derive a large number of lamps with different shapes, including lamp strips, lamp strings, lamp strips, modules, wall lamps, crystal lamps, and other products. Large LED floodlights and landscape lights that can be applied to outdoor advertising lighting, landscape engineering lighting, etc; A small LED light string that can be as small as a mung bean.

3、 Other superior performance, such as no flicker, lead-free mercury, no radiation, high brightness, low heat generation, etc.

Although LED has so many advantages, from a practical application perspective, there are still a series of problems with its current popularity. There are two main reasons. Firstly, core technologies such as LED chips are held in the hands of developed countries such as Japan and the United States, resulting in a small number of domestically developed chips and poor product quality. Secondly, despite China's vast territory and abundant resources, there is information congestion in rural areas, coupled with outdated technological awareness. Currently, the promotion of LED products is mostly limited to large and medium-sized cities.

Despite this, many businesses still feel the development trend of LED and are vigorously promoting the popularization of LED. However, in such a fiercely competitive environment, it is inevitable that there will be vicious competition in the market. The vicious competition in the LED market is mainly reflected in merchants using inferior materials to produce products, which, although at low prices, cannot guarantee consumer interests. LED is a new product that has only emerged in recent years. The country does not have a complete management system, and product quality can only be determined by the market. The interests of merchants exist in the final stage of the production and manufacturing process, with very low profits and forced to adopt extreme strategies.

Therefore, there are a large number of substandard products in the market, the most obvious of which is to replace high-quality lamp beads with inferior ones, and the most obvious difference between good and bad lamp beads is the chip.

How to identify chips is a very difficult problem for ordinary people. The type of chip determines the quality of LED, as well as the length of service life and lighting effect. Here, we use the simplest method of identifying lamp bead chips to identify lamp beads.

Firstly, the tools we need to prepare mainly include tweezers, a microscope, and then an LED lamp post. Next, we use tweezers to peel off the encapsulated silicone on the surface of the lamp beads, and we can see sesame sized LED chips. Then use a microscope to carefully check whether the pattern of the lamp bead chip is consistent with the known lamp bead chip. Generally, the product packaging has instructions for the lamp bead chip on the outside.

How to judge the quality of LED chips

1. Look at the price of LED chips: Generally, the price of the lower chip is higher than the price of the circular chip. high-power LED chips are definitely higher than low-power LED chips, and imported ones are higher than domestically produced ones. The source prices of imports decrease from Japan, the United States, and Taiwan in order.
2. Check the quality of LED chips: Evaluating the quality of LED chips is mainly measured by two main standards: bare crystal brightness and attenuation. During the packaging process, the yield of LED chip packaging is mainly calculated.
3. Flatness: The surface flatness of the LED display screen should be within 0 ≤ a ≤ 1mm to ensure that the displayed image does not distort. Local protrusions or indentations may cause blind corners in the visual angle of the display screen. The quality of flatness is mainly determined by ① production process and materials; ② On site steel engineering construction; ③ The installation and construction quality of the display screen installation team is determined.
4. Brightness and visual angle: The brightness of indoor full color LED display screens should be above 800cd/m, and the brightness of outdoor full color LED display screens should be above 1500 cd/m to ensure the normal display of LED display screens. Otherwise, the displayed image may not be clear due to low brightness. The brightness is mainly determined by the quality of the LED tube. The size of the viewing angle directly determines the amount of visible area space of the LED display screen, so the larger the better. The size of the visual angle is mainly determined by the LED chip.
5. White balance effect: The white balance effect is one of the most important indicators for LED display screens. In color science, pure white is only displayed when the ratio of the red, green, and blue primary colors is 1:4.6:0.16. If there is a slight deviation in the actual ratio, there will be a deviation in the white balance. Generally, it is important to pay attention to whether white has a bias towards blue or yellow green. The quality of white balance is mainly determined by LED chips, which also have an impact on the color restoration ability
6. Color restoration: Color restoration refers to the color restoration of LED display screens. The color displayed on LED display screens should be highly consistent with the color of the playback source, in order to ensure the authenticity of the image.
7. Whether there are mosaics or dead spots: Mosaics refer to the small four squares that appear on the LED display screen and are usually bright or dark, which is the phenomenon of module necrosis. The main reasons are: ① the quality of the connectors used in the LED display screen is not good, and there are protrusions or depressions; ② The LED light is not aligned; ③ The sealing adhesive process is not qualified. Dead spots refer to individual dots that appear frequently black on the LED display screen, and the number of dead spots is mainly determined by the quality of the LED chip.

The above points are the standards for judging the quality of LED chips. I hope everyone should be careful and choose the one that suits them! Satisfied LED chip!