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Constant power LED lighting device and control method for constant power output

A technology of light-emitting diodes and a control method, which is applied in the field of light-emitting diode lighting devices, can solve the problems of inability to set prices by quantity, high manufacturing costs, and increased inventory pressure of drive units.

Inactive Publication Date: 2016-09-28
林铭锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for manufacturers of light-emitting diode lighting devices, several types of drive units need to be manufactured for each power of light-emitting diode chips, which not only increases the pressure on the inventory of drive units, but also cannot be priced by quantity, resulting in high manufacturing costs

Method used

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  • Constant power LED lighting device and control method for constant power output
  • Constant power LED lighting device and control method for constant power output
  • Constant power LED lighting device and control method for constant power output

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Embodiment Construction

[0029] In order to illustrate the present invention more clearly, the following examples are given together with the drawings in detail as follows. figure 1 Shown is a constant power LED lighting device according to a preferred embodiment of the present invention, which is electrically connected to a power source 10 and includes an LED chip 20 , a driving unit 30 and a constant power adjustment module 40 . in:

[0030] The driving unit 30 is electrically connected to the power supply 10 and the light emitting diode chip 20, and is used to receive the power of the power supply 10 and output an operating voltage and an operating current to the light emitting diode chip 20; the driving unit 30 can be controlled Change the voltage value of the working voltage and the current value of the working current accordingly. In practice, the drive unit 30 can be designed based on PWM, half-bridge, Buck, Boost and other types of circuits.

[0031] The constant power adjustment module 40 i...

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Abstract

The invention discloses a rated-power light-emitting-diode lighting device and a rated-power output control method. The rated-power light-emitting-diode lighting device includes a light-emitting-diode chip, a driving unit, a voltage detection unit and a feedback control unit. The driving unit receives electric energy of a power supply and outputs a work voltage and a work current to the light-emitting-diode chip. The voltage detection unit is used for detecting the voltage value of the work voltage. The feedback control unit defaults at least three reference voltage values and voltage sections are formed between two adjacent reference voltage values. According to the measured voltage value of the work voltage and the slope parameter of a voltage section which the voltage value of the work voltage belongs to, the feedback control unit outputs a current control signal to the driving unit so as to control the current value of the work current so as to make power transmitted to the light-emitting-diode chip kept in the range of a preset power.

Description

technical field [0001] The present invention is related to LED driving, and more specifically refers to a constant power LED lighting device and a control method for constant power output. Background technique [0002] The light-emitting diode lighting device includes a light-emitting diode chip and a driving unit to provide the electric energy required by the light-emitting diode chip. At present, there are various specifications of light-emitting diode chips on the market. For light-emitting diode chips with the same power, there are various combinations of operating voltage and operating current. Taking a 28W light-emitting diode chip as an example, the combination of operating voltage and operating current is There are combinations of 80V / 350mA, 56V / 500mA, 40V / 700mA, etc. Therefore, in order to drive LED chips with such a combination of specifications, the current method is to develop a LED chip driving unit for each LED chip. However, for manufacturers of light-emittin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 林铭锋
Owner 林铭锋