LED bulb lamp

Abstract

The invention provides an LED bulb lamp. The LED bulb lamp comprises a housing, a radiator, lamp boards, a driving power source and a metal lamp head. The lamp boards comprise substrates and LED light sources. The housing is provided with air vents. The inner surface of the radiator is provided with radiating fins extending to the interior of the radiator. A radiating channel is formed by the inner surface of the radiator and the outer surfaces of the radiating fins. A convective passageway is formed by the radiating channels and the air vents. The LED bulb lamp has following beneficial effects: heat radiation is improved by the convective passageway similar to a chimney in the bulb lamp and the technical scheme of separation between light and heat passageways is ingenuously adopted, that is to say, the chimney effect formed in the radiator is applied for heating; the lamp boards are arranged outside of the radiator and used for emitting light; light emission and radiation are finished in different regions of the bulb lamp; the LED bulb lamp formed in the above manner can not only have uniform luminescence illuminance, and high utilization rate of luminous flux but also have greatly-improved radiation effect.

Description

[0001] This application is a divisional case of a Chinese invention patent application with an application date of September 6, 2015 and an application number of 201510560087.2. technical field [0002] The invention relates to an LED bulb lamp. Background technique [0003] LED bulb lamps have the advantages of long service life, small size, energy saving and power saving, and are widely used in the market to replace existing incandescent lamps. However, the LED light source generates a lot of heat, and the performance and life of the light source are directly related to the temperature. The higher the temperature, the worse the performance and the shorter the life. Due to the small size of the LED bulb lamp, it is difficult to dissipate the heat of the LED bulb lamp. Therefore, the heat dissipation problem of LED lamps has always been one of the core issues that people in the industry pay attention to. If this problem is not handled properly, it will cause light decay, an...

AI Technical Summary

Problems solved by technology

Therefore, the heat dissipation problem of LED lamps has always been one of the core issues that people in the industry pay attention to. If this problem is not handled properly, it will cause light decay, and the lamp will die quickly, which will greatly shorten the life of the lamp.

In order to solve the heat dissipation problem of this kind of LED light bulb, the substrate must be enlarged, and the distance between the substrate and the inside of the shell is very small or even in contact, so the lighting effect will be quite different from that of incandescent lamps.

After igniting the LED bulb lamp, the visual effect produced will have several sections of dark spots. At the same time, a large part of the light from the LED light source is not directly irradiated to the inner wall of the shell, but to the substrate and then reflected to the inner wall of the shell, so that the loss Partial luminous flux

In addition, due to relying on the substrate as a heat sink, the area of ​​the substrate increases and the cost increases. At the same time, the convection channel formed is equivalent to the entire space inside the shell. Because the space is too large, the effect of increasing the speed of air movement by internal convection is not obvious

In addition, since there is no metal radiator inside, the heat is simply conducted by the base plate, and then dissipated by convection up and down through the opening of the shell. Since the thermal conductivity of the base plate is not high, the area of ​​the convection hole in the shell needs to be increased, and the area of ​​the upper opening needs to reach 634 square millimeters, the opening area of ​​the lower part needs to reach 1500 square millimeters, there is a danger that people are more likely to come into contact with the live parts of the internal bulb lamp

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