led substrate and high voltage led lamps

Abstract

The invention discloses a high voltage resistant LED lamp which comprises a driving power supply, a heat dissipation casing and an LED substrate. The LED substrate comprises a circuit layer, an insulating layer and a metal layer and is characterized in that the circuit layer comprises positive pole copper foil and negative pole copper foil which are separated from each other, the total area of the copper foil meets the equation that S>=4piKd*CY1 / epsilon, wherein S is the sum of the area of the positive pole copper foil and the negative pole copper foil, K is a static parameter of the insulating layer, d is the thickness of the insulating layer, CY1 is capacitance of the driving power supply, and epsilon is a dielectric constant of the insulating layer. According to the high voltage resistant LED lamp, distributed capacitance of an aluminum substrate is increased by increasing the area of the positive pole copper foil and the negative pole copper foil, voltage applied to two ends of the aluminum substrate during in withstanding voltage tests is reduced, the lamp can meet the withstanding voltage test requirements on the conditions that components are not increased, the high voltage resistant LED lamp is safe and reliable, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of LEDs, and more specifically relates to an LED substrate and a high-voltage-resistant LED lamp. Background technique [0002] LED is a semiconductor device that can directly convert electrical energy into light energy. It has changed the principle of tungsten filament luminescence of incandescent lamps and three-based toner luminescence of energy-saving lamps, and uses electric field luminescence. In modern society, because of the advantages of LEDs such as small size, long life, high luminous efficiency, no radiation and low power consumption, people are using LED lighting more and more widely. [0003] At present, the existing LED lamps generally include a metal lamp housing and a PC cover arranged on the metal lamp housing. The metal lamp housing is provided with an LED substrate (heat-conducting circuit board) and a driving power supply. The output end of the driving power supply is connected to the he...

AI Technical Summary

Problems solved by technology

If the heat conduction circuit board of the LED is broken down, it is considered that the LED lamp does not meet the requirements and cannot pass the safety high voltage test

[0004] In order to meet the safety test requirements, the existing methods such as a method for an LED lamp to pass the safety high-voltage test disclosed in Chinese patent CN103162259A and a high-voltage LED lamp, which adopt heat conduction between the output end of the driving power supply and the LED lamp The circuit between the metal base layers of the circuit board is connected with a bleeder resistor to improve the high-voltage resistance of the lamp. However, this method has the following problems: First: If the positive pole / negative pole is connected to the aluminum substrate, the aluminum substrate has Connected to the metal case, the metal case is connected to the earth, causing the positive / negative connection of all lamps to be short circuited, causing the circuit to be unbalanced

Second: If the positive pole and / or negative pole are connected to a resistor at the same time, the resistor becomes a load, resulting in a decrease in system efficiency

Third: Increasing the resistance will increase the material cost and processing cost. The more components, the higher the risk of failure

Images