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Light-emitting diode open-circuit-failure bypass switch and circuit comprising the bypass switch

A technology of light-emitting diodes and bypass switches, which is applied in the electrical field, can solve problems such as deterioration and failure, and achieve the effect of reducing the voltage drop difference

Inactive Publication Date: 2015-01-07
靖江市城中村投资建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consequences of the increase in current may cause the rest of the normal light-emitting diodes to undergo electrical overstress, gradually deteriorate, or even fail; especially when the power supply is a constant voltage power supply, this electrical overstress effect will be more significant

Method used

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  • Light-emitting diode open-circuit-failure bypass switch and circuit comprising the bypass switch
  • Light-emitting diode open-circuit-failure bypass switch and circuit comprising the bypass switch
  • Light-emitting diode open-circuit-failure bypass switch and circuit comprising the bypass switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as figure 2 shown, LED open circuit fail-bypass switch, including

[0030] An executive device connected in parallel with the light-emitting diode for conduction when the open-circuit failure of the light-emitting diode connected in parallel with it,

[0031] a trigger device connected in parallel with the actuator and used to trigger the conduction of the actuator,

[0032] A compensating device connected in series with the actuator and used to compensate for the voltage drop difference between the actuator and the light emitting diode.

[0033] The executive device is a thyristor whose conduction direction is consistent with the conduction direction of the light-emitting diode; the trigger device is composed of two resistors connected in series, and the gate of the thyristor is connected between the two resistors; Directional diodes are silicon diodes.

[0034] When the light-emitting diodes are all turned on, the thyristor bears the positive anode v...

Embodiment 2

[0036] Embodiment 2: as image 3 As shown, the difference from Embodiment 1 is that the trigger device is a Zener diode connected between the gate and the anode of the thyristor.

Embodiment 3

[0037] Embodiment 3: as Figure 4 As shown, the LED open-circuit fail-bypass switch includes a thyristor whose cathode gate and anode gate are respectively connected to its cathode and anode through two resistors, a silicon diode connected in series with the thyristor and whose conduction direction is consistent with the thyristor, A Zener diode is connected between the cathode gate and the anode of the thyristor as the trigger device.

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PUM

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Abstract

The invention relates to a bypass switch in the field of electricity, in particular to a light-emitting diode open-circuit-failure bypass switch and a circuit comprising the bypass switch. The aims of the invention are achieved by the technical scheme as follows: the light-emitting diode open-circuit-failure bypass switch comprises an execution device, a trigger device and a compensator device, wherein the execution device is used for realizing conduction when a light-emitting diode connected with the light-emitting diode open-circuit-failure bypass switch in parallel encounters failure caused by circuit opening; the trigger device is connected with the execution device in parallel and used for triggering the execution device to realize conduction; and the compensator device is connected with the execution device in series and used for compensating the difference between the voltage drop of the execution device and the voltage drop of the light-emitting diode. The difference between the voltage drop of the bypass switch and the voltage drop of the light-emitting diode is smaller than that between the voltage drop of the circuit of the bypass switch and the voltage drop of the light-emitting diode in the background technology.

Description

technical field [0001] The invention relates to a bypass switch in the electrical field, in particular to a bypass switch for an open-circuit failure of a light emitting diode and a circuit including the bypass switch. Background technique [0002] The currently announced semiconductor bypass switch circuits for protecting light-emitting diodes from open-circuit failure, such as figure 1 As shown, it consists of a thyristor connected in parallel with a light-emitting diode in a group of light-emitting diodes connected in series in the same direction, and a voltage divider connected in parallel with the thyristor; the voltage divider is composed of resistors and connected with the thyristor The gate is connected to provide a certain potential for the gate of the thyristor, so that the thyristor is turned off when the light-emitting diode is working normally, and turned into an "on" state when the light-emitting diode fails to open; thus, the thyristor acts as a bypass switch ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 谢可勋西里奥艾珀里亚科夫
Owner 靖江市城中村投资建设有限公司