What Are the Factors That Affect AC -free LED Light Decay?

1. AC -free LED itself quality problem: 1. The LED chip used is not good, and the brightness attenuation is faster. 2. There are defects in the production process. The heat dissipation of the LED chip can not be conducted well from the PIN foot, resulting in the excessive temperature of the LED chip that exacerbates the attenuation of the chip. 2. Use conditions: 1. LED is a constant stream drive. Some LEDs use voltage drivers to make LED attenuation. 2. The driver current is greater than the rated driver condition. In fact, there are many reasons for the light decay of AC -free LED products. The key is the problem of heat. Although many manufacturers do not pay special attention to the problem of heat dissipation, these secondary LED products will be used for a long time. The LED products that focus on heat dissipation should be high. The thermal resistance of the LED chip itself, the impact of silver glue, the heat dissipation effect of the substrate, and the aspect of the colloid and golden line are also related to light decay. Three factors affecting the quality light decay of LED lamps, first of all, what kind of LED white lights choose. This is very important. The quality of AC -free LED can be said to be a very important factor. For example, the same is represented by the chip of the chip of the chip 14mil, and the LED white lights encapsulated by the bottom gum and white glue and packaging glue made of ordinary epoxy resin are lit in a 30 -degree environment. After thousands of hours, the attenuated data is 70%of the light decay; if the D type D low -decaying glue is encapsulated, in the same aging environment, the 1,000 -hour light decay is 45%; , 1,000-hour light decay is 12%; if category B is encapsulated in low-decreased glue, in the same aging environment, thousands of hours of light decay of -3%; if Class A low decay glue, in the same aging environment, thousands of hours of light, thousands of hours of light Dechat is -6%. Second, the working environment temperature of LED lamp beads. According to the data when a single LED white light is aging, if the LED white light has only one lighting work, at the same time, the environmental temperature it is located is 30 degrees, then the bracket temperature of a single AC -free LED does not drive LED work. Will exceed 45 degrees. At this time, the life of this LED will be ideal. If there are 100 LED white lights on the same work at the same time, the interval between them is only 11.4mm, then the temperature of the bracket temperature of the LED white lights around the lamp pile may not exceed 45 degrees, but the middle of the lamp pile is in the middle of the lamp pile. Those LED white lights may reach 65 degrees high temperature. At this time, the LED lamp bead is a test. Then, those LED white lights gathered in theoret will theoretically faster the light faster, and the LED white light around the lights will be slower. Anyway, everyone should know that the LED is afraid of heat. The higher the temperature, the shorter the LED life, the lower the temperature, and the longer the LED life. The working temperature of LED ideal is of course between 5 or zero degrees negative. But this is basically impossible. Therefore, after we understand the ideal working parameters of LED lamp beads, we should strengthen the function of heat conduction and heat dissipation when designing lamps as much as possible when designing lamps as much as possible. Anyway, the lower the temperature, the longer the LED life span. Third, AC -free LED work electronic parameter design. LED -side light source LED injection molding module LED light strip LED waterproof irrigation glue module Hongyan cab triple -in -cab. Three -one heavy work accessories According to the experimental results, the lower the LED white light, the smaller the heat emitted, the smaller, the Of course, the smaller the brightness is. According to the survey, the design of the LED solar lighting circuit, the driver current of LED is generally only 5-10mA; the large number of lamps used in the lamps, such as more than 500 or more And generally popular LED application lighting driving currents are only 15-18mA, and few people designed the current to more than 20mA. The experimental results also showed that under the driver current of 14mA, and the lid was not ventilated, the air temperature in it reached 71 degrees, low decline products, 1,000 -hour light decay, 2000 hours of light decay of 3% to 3%, 3% decaying is 3%. This shows that this low -declining LED white light has reached its best limit in such an environment. No matter how big it is, it is a damage to it. Because the aging board for aging does not have a heat dissipation function, the heat generated by AC -free LED is basically unable to transmit it outside. The experiment proved this. The air temperature in the old panel has reached a high temperature of 101 degrees. The surface temperature of the lid on the old panel is only 53 degrees, which is dozens of degrees. This shows that the designed plastic lid basically does not have the function of conducting heat and heat dissipation. But in the general lamp design, considering the function of conducting heat and heat dissipation. Therefore, in summary, the design of the working electrical parameters of LED lamp beads should be based on the actual situation. If the heat -conducting heat dissipation function of the lamp is very good, it is okay to increase the driving current of LED white lights, because the LED lamp beads work generate. The heat can be exported to the outside, and there is no damage to the LED, which is the care of the LED. On the contrary, if the heat -conducting heat dissipation function of the lamp is sloppy, the circuit is designed smaller, so that it puts less heat out of it.