LED illumination lamp

Abstract

The invention relates to an LED jacklight, comprising a crust, a circuit substrate arranged inside the crust, a plurality of LED light sources distributed and fixed on the circuit substrate, a diffuser arranged at the crust opening and an AC / DC constant current drive power supply arranged on the crust back. The invention is characterized in that a plurality of reflection cups are arranged on the circuit substrate, corresponding to a plurality of LED light sources; each LED light source is positioned in one reflection cup. The LED jacklight has the advantages that the distribution range of light is wide, the illumination distance is long, the brightness is high and even, the thermal resistance of the LED light sources is lower than the threshold temperature, the attenuation of light intensity is little and the service life is long.

Description

technical field [0001] The invention relates to an illuminating lamp, in particular to an LED illuminating lamp with high power. Background technique [0002] LED (Light-Emitting-Diode, Chinese means light-emitting diode) is a semiconductor that can convert electrical energy into visible light. LED lighting is an emerging industry developed in recent years. It can be called another lighting revolution since the advent of incandescent lamps in the 19th century. The third generation of lighting source after sodium lamp, etc.). It changes the principle of traditional incandescent lamp tungsten light emission and energy-saving lamp three-color phosphor light emission principle, and uses electric field to emit light at room temperature and low voltage. Compared with traditional lighting sources, LED lighting has a series of advantages such as high efficiency, energy saving, environmental protection, and long life, especially in terms of energy saving and environmental protectio...

AI Technical Summary

Problems solved by technology

Adopting such a structural method improves the brightness of the LED lighting lamp, but such a structure easily increases the temperature inside the LED lighting lamp housing, and each LED light source is affected by heat differently, and the middle LED light source is surrounded by LED lights. Surrounded by light sources, the heat is the most and the temperature rises the fastest. The surrounding LED light sources, especially the LED light sources at the edge, are relatively less heated, and we know that the increase in temperature will inevitably accelerate the light intensity attenuation of the LED and even cause the LED The reduction of service life, therefore, the existing LED lighting lamps have the disadvantages of rapid attenuation of light intensity and low service life after being used for a period of time

In addition, multiple LEDs gathered together can increase the brightness of the LED lighting, but it cannot lengthen the illumination distance of the LED lighting. For this reason, the usual practice is to add a reflective surface inside the housing to gather the light emitted by all LED light sources. Reflected, but in terms of actual effect, the effect of improving the lighting distance is not ideal, the main reason is that multiple LED light sources gather to form a surface light source, and the position of each LED light source in the reflective surface is different , under the same large reflective surface, it is impossible to ensure that the light emitted by each LED light source hits the reflective surface, and only a very small number of LED light can be reflected by the light-emitting surface; in addition, there is another way to use lenses Light distribution method, but the lens light distribution only considers the light intensity within the half-power angle range of the LED light source, ignoring the effective use of afterglow outside the half-power angle range

[0004] In addition to the above disadvantages, the existing LED lighting lamps also have some other disadvantages. For example, the existing LED lighting lamps usually use a low-voltage switching power supply (D024V), and multiple LED light sources are connected in series and then in parallel. Such a circuit structure requires A current-limiting resistor is added to each series connection, resulting in a large loss of electric energy; in addition, the circuit board is placed in the outer shell, and the heat dissipation effect is not ideal.

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