Lighting device with dimming and cooling functions and its fan

Abstract

The invention discloses a lighting device with light modulation and radiation functions, and solves the problems of non-light modulation in the lighting process; the technical method refers to that a modulation unit is electrically connected with a power supply unit; the power supply unit, a lighting unit and a fan are mutually connected in series so as to form a series loop; the invention also discloses a fan applied in the lighting device, and solves to the problems of a flashing light source in a modulation process of the lighting device; the technical method is that a drive unit is electrically connected with a voltage controlled loop and a motor; when input current of the voltage controlled loop is overly low, the drive unit can output a PWM signal to drive the motor; therefore, the lighting device has light modulation and radiation functions, and light source flashing phenomenon cannot happen in the light modulation process.

Description

technical field [0001] The invention relates to an illuminating device, in particular to an illuminating device with functions of dimming and heat dissipation. Background technique [0002] Due to the increasing attention to the concept of environmental protection and energy saving, the light sources of lighting devices (such as incandescent lamps and halogen lamps, etc.) are gradually replaced by components with higher luminous efficiency, such as energy-saving lamps or light-emitting diodes (LEDs) )Wait. Among them, LED has the advantages of fast response, long life and not easy to break, but its luminous performance is easily affected by the heat generated when it is illuminated, so it is necessary to use a cooling device (such as a fan, etc.) to assist in heat dissipation, so as not to reduce the LED's luminescence. performance and service life. [0003] see figure 1 As shown, it is a new patent case of LED lighting module with cooling and automatic power-off function...

AI Technical Summary

Problems solved by technology

[0004] However, since the output current of the power supply unit cannot be adjusted in the series circuit, the LED light-emitting unit can only input a fixed current provided by the power supply unit to emit a light source with a fixed brightness.

Therefore, under the situation that the luminance of the LED light-emitting unit cannot be adjusted, it will not only cause a lot of inconvenience in use, but also limit the application field of the lighting device 9.

[0005] To sum up, when the existing lighting device 9 is actually used, in addition to the problem of being unable to adjust the luminous brightness, it will also cause doubts that the application field is limited. In actual use, different restrictions and disadvantages are derived, which is indeed inconvenient. Further improvement is urgently needed to enhance its practicability

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