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Protection technique of open loop damage of LED in series circuit

A technology of light-emitting diodes and series circuits, applied in the field of protection, can solve problems such as damage to the entire circuit

Inactive Publication Date: 2009-01-07
宗慎平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a protection technology that can effectively solve the damage to the entire circuit caused by the open circuit damage of a single light-emitting diode in a series circuit.

Method used

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  • Protection technique of open loop damage of LED in series circuit
  • Protection technique of open loop damage of LED in series circuit
  • Protection technique of open loop damage of LED in series circuit

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Embodiment Construction

[0018] Such as figure 2 As shown, an LED lamp using the protection technology of the present invention is composed of a single series branch in which light emitting diodes are connected in series, and the series branch is composed of n light emitting diodes N 1 , N 2 ...N n It is formed in series with the balance resistor R, and a voltage regulator tube W is connected in parallel at both ends of each light-emitting diode. 1 , W 2 ...W n . Zener tube stable voltage value U w Should be ≥ LED forward voltage value U N . When the circuit works normally, due to U w ≥U N , Zener tube does not work in the circuit. And when a LED in the circuit is damaged: if it is damaged by a short circuit, it will not have a great impact on the entire circuit, but the LED will not light up, and the voltage regulator will not work due to the short circuit of the LED. And if it is open circuit damage, such as N 1 When the open circuit is damaged, then N 1 The voltage at both ends increa...

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Abstract

The invention discloses a protection technique used for LED open-circuit damage in a serial circuit, which is characterized in that two ends of each or a plurality of LEDs in the serial circuit are respectively connected with stabilizer elements in parallel respectively. When certain an LED open-circuit in the circuit is damaged, the voltage at two ends of the LED is increased due to the open circuit, thus breaking through the stabilizer element; therefore, the whole serial circuit can still run normally due to the conduction of the stabilizer element, and other LEDs in the branch circuit can still work normally. Therefore, the protection technique of the invention effectively solves the problem of the whole circuit caused by the damage of the open-circuit of certain an LED, and reduces the effects to the lowest extent.

Description

technical field [0001] The invention relates to a protection technology for ensuring the normal operation of the entire circuit when a certain light-emitting diode in a series circuit of light-emitting diodes is damaged due to open circuit. Background technique [0002] With the increasing development of science and technology, circuits formed by series connection of ultra-high brightness light-emitting diodes (such as LED lamps) are being more and more widely used in daily lighting, agriculture, biological lighting, transportation and other fields. figure 1 What is shown is an LED lamp, which is composed of single or multiple series branches composed of light emitting diodes connected in series, and each series branch includes n light emitting diodes and a balancing resistor R. Traffic lights are also made of about 3-7 light-emitting diodes connected in series and then connected in parallel. For another example, the invention patent with the patent number of 200620105207.6...

Claims

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Application Information

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IPC IPC(8): H05B37/04
Inventor 宗慎平邵榴子宗稚鹏
Owner 宗慎平