Thirdly, the working electrical parameters of LED lamp beads are designed.
According to the experimental results, the lower the driving current is, the less heat the LED white lamp emits. Of course, the less brightness it emits. According to the survey, in the design of LED solar lighting circuit, the driving current of LED is generally only 5-10ma; the number of lamp beads used in lamps has a large number of products, such as more than 500, or more, the driving current is generally only 10-15ma, while the driving current of general LED application lighting is only 15-18ma, few people design the current above 20mA.
And the experimental results also show that under the driving current of 14mA, and the air temperature inside reaches 71 degrees, the low-power product will decline to zero in 1000 hours and 3 in 2000 hours, which shows that this low-power LED white light has reached its maximum use in such an environment, which is a kind of damage to it.
Because the aging board has no heat dissipation function, the heat generated when the LED works is basically unable to transmit to the outside. This is proved experimentally. The air temperature inside the aging plate has reached 101 ℃, and the surface temperature of the cover on the aging plate is only 53 ℃, dozens of degrees different. This shows that the plastic cover does not have heat conduction and heat dissipation function basically. But in the design of general lamps, the function of heat conduction and heat dissipation is considered. Therefore, in summary, the design of the working electrical parameters of LED lamp beads should be based on the actual situation. If the heat conduction and heat dissipation function of the lamp is very good, it doesn't matter that the driving current of the LED white lamp increases a little, because the heat generated by the LED lamp beads can be exported to the outside in an instant, without damage to the LED, which is the best care for the LED.
