Light-emitting diode (LED) bulb lamp capable of achieving memorable dimming

Abstract

The invention discloses an LED bulb lamp capable of achieving memorable dimming. The LED bulb lamp is electrically connected with a mains switch and comprises a driving circuit, a plurality of groups of LED loads and a frosted lamp shade, wherein the driving circuit and the plurality of groups of LED loads are connected with the mains switch sequentially, the frosted lamp shade covers light-emitting faces of LED loads, the driving circuit comprises a constant-voltage power circuit unit, a microprocessor and a control circuit which are connected sequentially, the constant-voltage power circuit unit is connected with the mains switch, and the control circuit is connected with LED loads. The LED bulb lamp can implement the dimming function and can storage or switch light-emitting states on the condition that only the mains switch is connected or disconnected; and original traditional bulb lamps without the dimming function and the memory function can be replaced directly on the condition that no circuit or accessory is required to be added, so that the dimming function can be implemented according to different brightness requirements of customers, the application range of the dimmable bulb lamp is greatly expanded, and simultaneously, the cost and the time for modification of traditional bulb lamps are reduced.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to a memory-adjustable LED bulb lamp. Background technique [0002] Traditional incandescent lamps have been gradually replaced by more environmentally friendly LED lamps. In terms of function, general LED bulbs can be divided into non-dimmable LED bulbs and dimmable LED bulbs, and general dimmable LED bulbs cannot be dimmed without any external wiring or accessories. Direct replacement of non-dimmable LED bulbs, so to directly replace non-dimmable LED bulbs with dimmable LED bulbs requires replacement of external parts of the circuit, which will cost a lot of money. [0003] At present, there are two kinds of dimmable LED bulb lamps: pulse width modulation (PWM) dimming and adjustable driving current. During the dimming process of these two schemes, the power supply is either interrupted or the rated power is reduced, which will cause stroboscopic or Insufficient luminescence causes e...

AI Technical Summary

Problems solved by technology

The disclosed technical solution adopts the method of adjusting the current and then adjusts the brightness of the LED load to realize the dimming function, which will shorten the service life of the light-emitting diode, is also not conducive to the improvement of the conversion efficiency, and there is no memory function, and there are technical defects

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