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LED display screen supply circuit

A technology of LED display screen and power supply circuit, which is applied in the direction of circuit devices, electrical components, emergency power supply arrangements, etc.

Active Publication Date: 2016-02-24
张长领
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the defect of this circuit is that only when one of the power supplies is completely unable to supply power, can another power supply be used to supply normal power to all LED box modules, and when the power supply is unstable, the power supply of the LED box modules The power supply will switch repeatedly between the two power supplies

Method used

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Embodiment Construction

[0034] In order to explain more clearly the overheating protection circuit of the network equipment provided by the present invention, the following specific description will be made in conjunction with the embodiments. figure 1 It is a structural block diagram of the LED display power supply circuit of an embodiment. figure 2 for figure 1 The schematic circuit diagram of the LED display power supply circuit of the embodiment shown.

[0035] The LED display power supply circuit provided in this embodiment is used to supply power to the LED box module, and the LED box module includes a first LED box module and a second LED box module. In order to improve the utilization rate of the power supply, the LED display power supply circuit uses dual power supplies to supply power to the LED box module at the same time, specifically: the first power supply is used to supply power to the first LED box module, and the second power supply is used to supply power to the second LED box mod...

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Abstract

The invention relates to an LED display screen supply circuit, a first power supply is adopted to supply power to a first LED box body module, and a second power supply is adopted to supply power to a second LED box body module, thereby improving the utilization rate of power supplies. According to the LED display screen supply circuit, on the basis of the arrangement of a voltage sampling circuit and a voltage comparison circuit, after an output holding circuit receives a first switching signal or a second switching signal, even if an output signal of the voltage comparison circuit changes, the first switching signal or the second switching signal is still maintained to be output to a power switching circuit. Thus, no matter a fault occurs in the first power supply or the second power supply, the LED display screen supply circuit can keep a switching result of the power switching circuit unchanged through the output holding circuit, thereby enabling the first LED box body module and the second LED box body module to have a stable power supply source all the time.

Description

technical field [0001] The invention relates to the technical field of LED display, in particular to an LED display power supply circuit. Background technique [0002] LED display has been more and more widely used because of its advantages of high brightness, low working voltage and long life. In practical applications, in order to ensure that the LED display can always be in working condition, people usually set up two power supplies in the LED display. Regarding the dual-power LED display circuit, the following two are the most widely used. [0003] In the first dual-power LED display circuit, only one power supply is used for normal power supply when the LED is working normally, and another backup power supply is controlled to supply power to the LED cabinet module when the power supply is detected to be faulty. However, the disadvantage of this circuit is that one of the two power supplies is always in an idle state, the utilization rate is low, and it is impossible to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/04
CPCH02J9/04Y02B70/30Y04S20/20
Inventor 刘会明楚阿真段纪林刘小林郑黄张鹏
Owner 张长领
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