Five Bad Phenomena in the LED Panel Light Market
November 05, 2022
Here, let us dissect the bad phenomenon of LED panel light in the current market from a technical point of view.
First, let's analyze the LED light source devices currently used in LED panel lights
Due to the characteristics of small size, suitable power, high luminous efficiency, easy light control and heat dissipation, the current LED panel lights mainly use SMD4014 lamp beads. We have conducted comprehensive testing of LED lamp beads used in multi-level "factories" in the industry.
The inferior products in the industry mostly use inferior lamp beads with low price and quality, and their chips are small (the chip size of the advantage 4014 lamp bead is 10*30, while the size of the low-quality lamp bead is below 10*23), and the light output is low; at the same time, its packaging Colloids and phosphors are all inexpensive configurations, and use copper wires with low melting point (gold wires for quality lamp beads) and iron brackets (copper brackets for quality lamp beads or synthetic materials with high thermal conductivity), so it is very easy to use during use. Burn out the lamp.
Second, let's analyze the drive power that is also the core component
Since the LED lamp bead is a low-voltage startup semiconductor device, the most basic requirement is that it needs to be driven by a matching low-voltage power supply, and requires a continuous and constant current (the current is too high, the light will decay quickly, and the lamp will be extremely dark or even burn out after a long time). lamp).
At present, there are three main technical solutions for LED drive power:
1. Resistance-capacitance step-down: the scheme is simple, the device is few, the cost is low, and the current is not constant. It is mainly used in the configuration of 3W and below LED lamps, and there is a danger of electric leakage caused by breakdown of the lamp board, so the structural shell of the lamp body must be insulated;
2. Non-isolated power supply: moderate cost, constant IC current, but there is also the danger of breaking down the lamp board and causing leakage, so the structural shell of the lamp body must be insulated.
3. Isolated power supply: high cost, constant IC current and good safety.
In order to achieve better light extraction efficiency, LED panel lights generally have a slender strip structure. In this way, in order to ensure the heat dissipation of LED lights, an all-aluminum structure is now used as a cavity and as a heat sink. The non-insulation of the aluminum lamp body requires the use of an isolated power supply to ensure basic safety, and at the same time, it can provide a continuous and constant current to ensure the long life of the lamp beads.
At present, there are no bottom-line products in the industry. In order to cut corners, some use resistance-capacitance step-down, and some use non-isolated constant-current power supplies. In order to deceive the market, they also use low-quality colloids. The drive scheme is exposed.
At the same time, for the same isolated constant current power supply, there are also advantages and disadvantages such as whether the scheme is reasonable, whether the configuration is comprehensive, whether the device is stable, whether the circuit is scientific, and whether the process is rigorous.
Here, only take the most understandable circuit board as an example. The inferior driver uses a paper core board, which is very easy to absorb moisture. During use, it is very easy to cause the circuit to be short-circuited and burned; while the high-quality driver uses a glass fiber board, which has stable lines. , The advantages of moisture resistance and durability.
In terms of process, the high-quality driver of the standard manufacturer adopts automatic patch and automatic wave soldering, without confusion and false soldering, which cannot be satisfied by the workshop process of inferior products.
3. Overall matching and process anatomy of LED panel lights
From a technical point of view, LED panel lights are essentially electronic and electrical products. In addition to the selection of materials and devices, professional and rigorous R&D design, experimental verification, production control, aging detection and other systematic measures are required to ensure product qualification and quality. stability.
1. The first is the reasonable matching design of lamp beads and power supply. If the configuration is improper, either the current or voltage is too high, and it is easy to burn the LED lamp beads; or if the power load is exceeded, the temperature rises during use, the lamp beads strobe or even the power supply burns out; the matching between the lamp beads and the power supply needs to be fully understood and Completed by a senior electronic engineer who recognizes LED and electronic technology.
2, and then the heat dissipation structure design. LED lamp beads will generate a considerable amount of heat during use. If the heat is not dissipated in time, the junction temperature of the LED lamp beads will be too high, which will accelerate the decay and aging of the LED lamp beads, or even die.
3. It is structural coordination again. As an electronic device, LED lamp bead is also a luminous body, which requires rigorous structural design in terms of device protection, light control and light guide, and is equipped with precise production technology to ensure the realization of the design.
In the current industry, low-quality parts that are not professionally designed are generally of poor quality. Workshop manufacturers buy and use them at roadside shops like Chinese cabbage. Such structural parts can easily lead to LED packaging during assembly, production and transportation. The colloid is crushed and broken. After a short period of use, the broken lamp beads will escape blue light, and the LED panel light will have blue and white quality problems.
At the same time, such shoddy parts have poor process accuracy, large light leakage, light absorption, and light loss, which greatly reduces the overall lighting efficiency, and the illuminance of the product is far from meeting the requirements, which completely deviates from the energy-saving advantages of LEDs.
Another notable example of structural design, the current LED panel lights in the industry mostly use a DC connector. This DC connector is originally used for signal transmission in weak electronic industries such as earphones, etc., and its over-power capability is poor, so it is not suitable for connecting wires of different specifications for LED panel lights. It is connected by solder, and inferior products in the industry are not fixed. In this way, in the environment of assembly, packaging, transportation, installation, etc., it is very easy to cause the welding of the plug to fall off, and a large proportion of the lines are blocked and cannot be lit. And the market can not be repaired serious problems.
Fourth, the production process quality control status
LED panel light, as an electronic and electrical product, requires strict and rigorous quality management means and facilities to ensure the reliability of quality, including the pros and cons of performance, stability of use, guarantee of life, etc.
Usually, from research and development to production and shipment, it is necessary to go through: photoelectric coordination design, structural design, optical design, industrial design, process design and other aspects of design, and then through prototype trial production, photoelectric parameter test, temperature rise test, life test And various physical and chemical stability experiments, and then enter the development and trial production after verification, and repeat the aforementioned development and testing experiments after the trial production to ensure reliability and stability before putting into mass production.
In mass production, performance and physical and chemical testing of various production materials including LED lamp beads, electronic components, lamp boards, various optical materials, structural materials, etc. are also required to ensure the qualification and consistency of materials, and , In the production process, rigorous online testing is also required to control the quality variation in the manufacturing process at any time.
Then, the current workshop enterprises in the industry have no way of designing and quality control concepts and practical operations. After completing the assembly in a patchwork and shoddy manner, they will dump on the market after lighting up, making a large number of "products" with low performance and low quality. flow to the market.
5. Overall industrial design and process requirements
At present, LED panel lights in the ceiling industry have the drawbacks of imprecise structure, sloppy craftsmanship, and rough production, such as exposed solder joints, random patchwork, etc., which have seriously affected the "tall and high" image that LED should have in the minds of consumers. .
To sum up, the integrated ceiling industry, as the main field of LED panel light application, hereby calls on industry practitioners to pay attention to and face up to the bad status quo of LED application in the industry, let us resist fake and inferior, show positive energy, and lead the industry healthy growth.
The above content is provided by WOSEN. WOSEN is a professional manufacturer and supplier of Led Flood Light, Led Street Light, Led Solar Light, etc. For more information, please visit https://www.wosenled.com/ or contact admin@wosenled.com or WhatsApp +86-13425434349
