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Time-sharing multi-path constant current driving light emitting diode (LED) lamp

A technology of constant current drive and LED lamps, which is applied in the direction of lamp circuit layout, lighting devices, light sources, etc., can solve the problem of high cost of driving power supply, achieve the effects of reducing electrical signal interference, pure output current, and reducing production costs

Inactive Publication Date: 2015-07-08
ZHEJIANG WANMA HIZHEN OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the LED lamp disclosed in this patent uses multiple constant current units, especially more than 3 constant current units, the cost of the driving power supply will be quite high

Method used

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  • Time-sharing multi-path constant current driving light emitting diode (LED) lamp

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Experimental program
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Embodiment 1

[0019] A time-sharing multi-channel constant current drive LED lamp, including 15 LED particles, and a driving power supply for driving the LED particles to emit light. The LED particles belong to 5 LED groups, each LED group includes 3 LED particles, and the driving power supply It includes a constant current conversion module that can output a constant current and a scheduling module connected to the output of the constant current conversion module. The scheduling module includes a controller for generating several PWM signals and several PWM signals controlled by the controller and The circuit breaker of the LED group is directly driven, and the circuit breaker is a MOS tube; the product of the current value of the output current of the constant current conversion module and the duty ratio of the PWM signal input to the circuit breaker is the driving current required by the LED group.

[0020] The duty ratios of all PWM signals are equal, the phases of all PWM signals are no...

Embodiment 2

[0022] A time-sharing multi-channel constant current drive LED lamp, including 6 LED particles, and a driving power supply for driving the LED particles to emit light. The LED particles belong to 3 LED groups, each LED group includes 2 LED particles, and the driving power supply It includes a constant current conversion module that can output a constant current and a scheduling module connected to the output of the constant current conversion module. The scheduling module includes a controller for generating several PWM signals and several PWM signals controlled by the controller and The circuit breaker of the LED group is directly driven, and the circuit breaker is a MOS tube; the product of the current value of the output current of the constant current conversion module and the duty ratio of the PWM signal input to the circuit breaker is the driving current required by the LED group.

[0023] The duty ratios of all PWM signals are equal, the phases of all PWM signals are not...

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Abstract

The invention discloses a time-sharing multi-path constant current driving light emitting diode (LED) lamp which comprises a plurality of LED particles and a driving power supply for driving the LED particles to emit light, wherein the LED particles are grouped into a plurality of LED groups; and each LED group comprises at least one LED particle. The time-sharing multi-path constant current driving LED lamp is characterized in that the driving power supply comprises a constant current conversion module capable of outputting constant current and a scheduling module connected to the output end of the constant current conversion module; the scheduling module comprises a controller for generating a plurality of pulse width modulation (PWM) signals and a plurality of on-off devices which are controlled by the PWM signals generated by the controller and can directly drive the LED groups; and a product of a current value of the output current of the constant current conversion module and a duty ratio of the PWM signals input into the on-off devices serves as the value of the driving current required by the LED groups. By only adopting one constant current unit, the production cost is greatly reduced; and compared with the conventional power supply with a plurality of constant current units, the time-sharing multi-path constant current driving LED lamp has the advantages that electric signal interference between adjacent two constant current units is reduced, and the output current of the power supply is relatively pure.

Description

technical field [0001] The invention relates to a time-division multi-channel constant current drive LED lamp, which belongs to the field of lighting manufacturing. Background technique [0002] With its high luminous efficiency and long life, LED lights are being gradually promoted as a substitute for conventional lighting sources. One of the main reasons holding back LED lights at the moment is that the cost of LED lights is prohibitively high compared to the fluorescent lights currently in use. [0003] The high cost of LED lamps is due to the following factors: 1. The cost of LED particles is relatively high; 2. High-power LEDs generate high heat during operation, requiring the installation of costly heat sinks; 3. The cost of LED drive power is relatively high. Due to the physical characteristics of LED itself, the LED drive needs to be driven by constant current, and the cost of constant current power supply is much higher than that of widely used constant voltage pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/42Y02B20/40
Inventor 钟海洪陈云王凤辉
Owner ZHEJIANG WANMA HIZHEN OPTOELECTRONICS TECH
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