Power supply device with a plurality of parallel connected power supplies and light emitting diode (LED) display device

A power supply device and power supply technology, which is applied in the direction of adjusting electric variables, static indicators, instruments, etc., can solve the problems of shortened life, heat generation, and display module cannot display normally, and achieve the effect of heat balance and life balance

Inactive Publication Date: 2012-05-09
深圳市虹源微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a power supply with a large current, it is easy to cause serious heating and shorten the life
Once one of the power supplies fails, it will cause all the power supplies connected in parallel to fail to work, resulting in the failure of the display module to display normally.

Method used

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  • Power supply device with a plurality of parallel connected power supplies and light emitting diode (LED) display device
  • Power supply device with a plurality of parallel connected power supplies and light emitting diode (LED) display device
  • Power supply device with a plurality of parallel connected power supplies and light emitting diode (LED) display device

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Embodiment Construction

[0015] figure 1 It shows the structure of a power supply device in which multiple power supplies are connected in parallel according to an embodiment of the present invention, and each power supply is provided with a current sharing control port CB. The current sharing control ports CB of all power supplies are connected in parallel. The positive terminals of all power supplies (in this embodiment, +5V is the positive terminal of the output terminal) are connected in parallel, and the negative terminals of all power supplies (in this embodiment, GND is the negative terminal of the output terminal) are connected in parallel. A current equalizing circuit is arranged inside the power supply. In this embodiment, L is the live wire of the power supply, N is the neutral wire of the power supply, and G is the ground wire of the power supply.

[0016] refer to figure 2 , 3 , 4, figure 2 It shows the structure of the current sharing control circuit with multiple power supplies ...

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PUM

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Abstract

The invention is applicable to the field of light emitting diode (LED) display screen electric power supplies, and provides a power supply device with a plurality of parallel connected power supplies and an LED display device. Parallel connection and current sharing of a secondary side are controlled by current of a primary side, so that the plurality of parallel connected power supplies has balanced current, balanced heating performance and balanced service life. Furthermore, if one of the power supplies is failed, other power supplies still can work normally, and the use of the display screen is not influenced.

Description

technical field [0001] The invention belongs to the field of LED display power supply, in particular to a power supply device and an LED display device in which multiple power supplies are connected in parallel. Background technique [0002] At present, my country's LED display industry is developing rapidly, and the volume of LED displays is getting bigger and bigger. However, the driving power of LED displays requires small size, high power, and stable performance. Therefore, the service life of LED displays depends mostly on its The performance of the driving power supply is stable above. Therefore, in order to reduce the failure of the LED display screen to work normally due to the damage of the LED display drive power supply, the drive power supply generally adopts parallel power supply. [0003] In the existing technology, when multiple power supplies are connected in parallel to supply power, the power supply current of each power supply is inconsistent, and some pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G05F3/02
Inventor 朱威
Owner 深圳市虹源微电子有限公司
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