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LED AC multi-phase drive device and its control method

A technology of light-emitting diodes and driving devices, which is applied to semiconductor devices of light-emitting elements, lighting devices, electroluminescent light sources, etc.

Inactive Publication Date: 2010-12-15
EPISTAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, the shortcoming of AC_LED 30 in the above-mentioned prior art is that the lighting schedule of AC_LED 30 is controlled by single-phase voltage, and the power cycle is fixed. It can change the frequency and control the simple lighting schedule, but cannot provide more changing requirements for the lighting schedule

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  • LED AC multi-phase drive device and its control method
  • LED AC multi-phase drive device and its control method
  • LED AC multi-phase drive device and its control method

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Embodiment Construction

[0056] First as Figures 2A to 2E As shown, it is the first embodiment of the multi-phase driving device for AC light-emitting diodes of the present invention, which is a device for driving AC_LEDs with two-phase voltages; it should be noted that in the figure, the phase difference between the two-phase voltages is 40 degrees. , to illustrate the effect of the first embodiment.

[0057] see Figure 2A , which shows the two-phase driving device for alternating current light-emitting diodes according to the first embodiment of the present invention, as shown in the figure, including a group of alternating current light-emitting diodes AC_LED 10 , the AC_LED 10 has a first electrode terminal connected to the node Na and a first electrode terminal connected to the node Na The second electrode terminal of Nb; and a multi-phase voltage generator 21, which converts the single-phase voltage source 20 into two-phase voltage sources (the first phase voltage Va and the second phase volt...

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Abstract

The invention relates to an AC multi-phase driving device in an LED and a control method thereof. Multi-phase voltage is used for driving the AC_LED to luminesce and controlling different lighting time courses of the AC_LED; when the AC_LEDs with different colors are assembled, the effect of changeable mixed lights can be achieved through driving the multi-phase voltage.

Description

technical field [0001] The present invention relates to an AC multi-phase drive device and control method for light-emitting diodes, in particular to an AC multi-phase drive device and control method for light-emitting diodes that drive AC_LEDs to emit light with multi-phase voltages and thereby control their lighting schedule . Background technique [0002] like Figure 1A-1D As shown, it is used to illustrate the single-phase driving method of an AC light-emitting diode (AC_LED) in the prior art. [0003] Please see first Figure 1A , which shows a prior art AC_LED control system, as shown in the figure, the AC_LED 30 is connected to an AC voltage source of 110V. Now take the AC_LED 30 with a starting voltage of 90V as an example for illustration. AC_LED 30 is composed of two sets of DC_LEDs electrically reversed in parallel, so when the AC voltage is equal to or greater than 90V, it starts to light the first set of DC_LEDs (forward DC_LEDs); the AC voltage continues to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08F21S4/00F21Y101/02H05B44/00F21Y103/00F21Y115/10
Inventor 林明德
Owner EPISTAR CORP