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System, redundant circuit and method for driving light emitting diode

A technology of light-emitting diodes and driving methods, which is applied to electroluminescent light sources, control/regulation systems, light sources, etc., and can solve problems such as sacrifice of luminous stability, inability to universally apply light-emitting diodes, and increased mass production costs

Inactive Publication Date: 2008-06-25
VASTVIEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether it is constant voltage drive, constant current drive, or AC drive, it still cannot provide a stable drive current that is not affected by voltage fluctuations or even voltage surges; in addition, when connecting more and more light-emitting diodes, these In light-emitting diodes, there will be some errors in the light-emitting characteristic relationship (I-V correlation curve) due to the mass-manufacturing process, so that the same driving circuit design cannot be applied to all light-emitting diodes in mass production, resulting in an increase in mass production costs. Or the sacrifice of luminous stability

Method used

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  • System, redundant circuit and method for driving light emitting diode
  • System, redundant circuit and method for driving light emitting diode
  • System, redundant circuit and method for driving light emitting diode

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Embodiment Construction

[0043] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0044] Fig. 1 is the diagram of the first embodiment of the driving method of the light-emitting diode of the present invention, which is mainly divided into three steps, wherein the first step is that a DC voltage source circuit 110 outputs a DC power supply VLED_DC; the second step is to convert the DC voltage VLED_DC is pressurized to a light emitting diode group 120 to generate a current ILED flowing through the light emitting diode group to make the light emitting diode group emit light. The light emitting diode group is a single light emitting diode, or a plurality of light emitting diodes are connected in series to form a light emitting diode string and the third step is a constant voltage and constant current adjustment step 130, which stabilizes the current ILED flowing through the light-emitting d...

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Abstract

The invention relates to a light emitting diode (LED) driving system and the method thereo for driving a light emitting diode shine continuously and steadily. The invention is mainly formed by that a direct current voltage source circuit supplies direct current power source to the light emitting diode. By a constant-voltage and constant-current regulator, an alternating current power source comprising a domestic power source is used efficiently, the light emitting diode is driven to shine continuously with constant power, and a plurality of light emitting diodes can still be driven by one driver for keeping the equal constant power.

Description

technical field [0001] The present invention relates to a light emitting diode (Light Emitting Diode, LED) drive system and method, especially to a light emitting diode that can be used for stable light emission, and is not limited to special process technology to maintain good light emission characteristics A driving system and method for a light emitting diode. Background technique [0002] The principle of action of a light-emitting diode is to flow current forward into the p-n interface of the semiconductor, so that the electrons on the interface combine with the holes to generate energy and emit it in the form of light; therefore, the luminance of the light-emitting diode and the current flowing through it are proportional, that is The higher the input current, the higher the luminous brightness. The traditional LED driving method is nothing more than adopting constant voltage ( FIG. 10A ), constant current ( FIG. 10B ), or alternating current ( FIG. 10C ) to drive the...

Claims

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Application Information

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IPC IPC(8): H05B33/08G05F1/56G05F3/26H05B44/00
Inventor 沈毓仁张育宪陈俊吉朱弘琦
Owner VASTVIEW TECH
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