Reciprocating-type LED lighting device

Abstract

The invention discloses a reciprocating-type LED lighting device which comprises a lamp body (3), LED lamp beads (4) and an AC drive power supply; the LED lamp beads (4) are divided into groups and are connected with the AC drive power supply through a circuit; and the LED lamp beads (4) are turned on and off in time sequence group by group under the driving of the AC drive power supply. The reciprocating-type LED lighting device is characterized by furthering comprising a driving system and an illuminating part (9); under the support of the driving system, the illuminating part (9) can conduct reciprocating translational motion relative to the LED lamp beads (4); the grouping distribution structure of the LED lamp beads (4) adapts to the structure of the illuminating part (9); the illuminating part (9) is positioned at the front ends of the LED lamp beads (4) and shields part of the LED lamp beads (4); and the time sequence of reciprocating translational motion of the illuminating part (9) adapts to the that of turning on and off of each group of LED lamp beads (4). The reciprocating-type LED lighting device has the advantages that the light-emitting quantity of the LED lighting device is almost constant, the flash effect is low; and heat dissipation and light distribution of a lamp can be designed conveniently.

Description

[0001] technical field [0002] The invention relates to the field of illuminating devices, in particular to a bar-shaped illuminating device which uses LED as the main light source and is adaptable to AC driving. [0003] Background technique [0004] Compared with incandescent lamps and energy-saving lamps, LED (light-emitting diode) has the advantages of energy saving, durability, and no pollution. It is regarded as the most promising next-generation lighting method and has attracted widespread attention. The basic light-emitting principle of light-emitting diodes is: in the process of carrier recombination in semiconductors, the excess energy released causes photon emission, and light waves of various colors such as red and blue are emitted. It belongs to the cold light source from electric energy directly to light energy. With outstanding advances, the unique principles and characteristics of LED not only bring the advantages of LED as a light source, but also put forw...

AI Technical Summary

Problems solved by technology

Due to the unidirectional conduction of light-emitting diodes, in order to maintain stable light emission in lighting applications, the current practice is to use direct current for driving. A rectifier transformer is attached to the lamp for AC / DC conversion, which will bring additional power loss and reduce the overall life of the product. Therefore, Chinese patent document CN101208813B discloses a "light-emitting device for AC power operation 》, the device comprises a light-emitting diode chip, the light-emitting diode chip has an array of series-connected light-emitting units, and switching blocks respectively connected to the nodes between these light-emitting units, wherein when the array is connected to an AC voltage power supply and is powered by the AC When driven by a voltage power supply, these light-emitting units are turned on and off sequentially by means of these switching blocks. This light-emitting device can turn on these arrays sequentially under AC power, and then turn off these arrays in the reverse order, thereby reducing the flicker effect and The luminous time can be increased, but this scheme has a complex structure and high requirements on the manufacturing process

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