CN203423822U

CN203423822U - Power supply system used for LED display screen

Info

Publication number: CN203423822U
Application number: CN201320390722.3U
Authority: CN
Inventors: 王潜; 蔡观华
Original assignee: Shenzhen Liantronics Co Ltd
Current assignee: Shenzhen Liantronics Co Ltd
Priority date: 2013-07-02
Filing date: 2013-07-02
Publication date: 2014-02-05
Anticipated expiration: 2023-07-02

Abstract

An embodiment of the utility model discloses a power supply system used for an LED display screen. The power supply system includes a main power distribution cabinet and an LED display module. The power supply system also includes an AC/DC converter connected with the main power distribution cabinet and converting AC voltage provided by the main power distribution voltage to first DC voltage, and a DC/DC converter connected between the AC/DC converter and the LED display module and converting and reducing the first DC voltage to second DC voltage for driving the LED display module to work. According to the utility model, by arranging the AC/DC converter and the DC/DC converter between the main power distribution cabinet and the LED display module successively, the AC voltage output by the main power distribution cabinet is converted through two-stage conversion to the low-voltage DC voltage for supplying power for the LED display module, so that technical effects of realizing simple structure, stable performance and low failure rate of the LED display screen are achieved.

Description

LED display electric power system

Technical field

The utility model relates to LED field, relates in particular to a kind of LED display electric power system.

Background technology

Existing LED large screen system adopts Switching Power Supply to carry out driving LED module in a large number, and these Switching Power Supplies are arranged in the casing of display screen module conventionally, civil power are converted to the low-voltage DC of LED module need of work.

Yet the use of a large amount of Switching Power Supplies, has caused LED display complex structure, unstable properties, the consequence that failure rate is high.

Utility model content

The utility model embodiment technical problem to be solved is, a kind of LED display electric power system is provided, and makes that LED display is simple in structure, stable performance and failure rate is low.

In order to solve the problems of the technologies described above, the utility model proposes a kind of LED display electric power system, comprise that main distribution cabinet and LED show module, LED display electric power system also comprises that the alternating current that connects and main distribution cabinet is provided is converted to the AC/DC transducer of the first direct voltage, and is connected in described AC/DC transducer and LED shows between module, described the first direct voltage is transformed and is reduced to the DC/DC transducer that driving LED shows the second direct voltage of module work.Thereby, adopt AC/DC transducer, convert alternating current to the first direct voltage as intermediate voltage, by direct current wire harness, intermediate voltage is transported to LED module, DC/DC transducer on LED module converts intermediate voltage to the second direct voltage that LED shows that module needs, to power on the spot.This electric power-feeding structure tool has the following advantages:

1) cabling circuit become succinctly, directly perceived, direct current wire harness total length shortens greatly, can save the wire rod that in a large amount of casings, distribution is used thus;

2) double hyer insulation AC length of cable greatly reduces;

3) intermediate voltage shows that higher than LED module drives needed low pressure (as 4 .2 V), transmits current density in wire rod and lowers, and corresponding line loss is less, is beneficial to energy-conservation;

4) each LED module carries a very high efficiency DC/DC transducer, and the hot-fluid of its generation is lower, makes the field distribution of whole display screen internal temperature even, and LED junction temperature reduces;

5) leakage current over the ground greatly reduces;

6) cold start impulse current greatly reduces;

7) PFC obviously improves, and harmonic energy reduces;

8) during power failure, can not cause that large-area displays is undesired, and maintenance difficulty reduces.

Further, described AC/DC transducer is alternating current to be converted into the AC/DC transducer of the first direct voltage in predetermined voltage range.

Further, described DC/DC transducer is that the first direct voltage is transformed and is reduced to the DC/DC transducer that shows the second direct voltage of module normal operation for LED.

Further, LED shows that module, DC/DC transducer are integrated in formation LED module in LED module box body.Thereby, after formation LED module, be convenient to carry out modularization assembling, assembling is simple, quick.

Further, the assembled formation LED display of a plurality of LED modules.

The beneficial effects of the utility model are: the utility model by setting gradually AC/DC transducer and DC/DC transducer between main distribution cabinet and LED demonstration module, the alternating current of main distribution cabinet output is carried out forming low-voltage DC after two-stage change is that LED shows module power supply, reached L ED display screen structure simply, the technique effect of stable performance and failure rate is low.

Accompanying drawing explanation

Fig. 1 is theory diagram of the present utility model.

Fig. 2 is the structural representation of LED display in the utility model.

Embodiment

It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can mutually combine, and below in conjunction with the drawings and specific embodiments, the utility model are described in further detail.

As shown in Figure 1, a kind of LED display electric power system, comprises that main distribution cabinet 10 and LED show module 20, and described LED display electric power system is also connected with AC/DC transducer 30 and DC/DC transducer 40.

30 connections of AC/DC transducer the alternating current that main distribution cabinet 10 is provided are converted to the first direct voltage.Particularly, described AC/DC transducer 30 is alternating current to be converted into the AC/DC transducer of first direct voltage of (as 36V to 42V) in predetermined voltage range.

DC/DC transducer 40 is connected in described AC/DC transducer 30 and LED shows between module 20, and for described the first direct voltage is transformed and is reduced to the second direct voltage, the second direct voltage shows module 20 work for driving LED.Particularly, described DC/DC transducer 40 is that the first direct voltage is transformed and is reduced to the DC/DC transducer that shows the second direct voltage of module 20 normal operations for LED.

As a kind of execution mode, LED shows that module 20, DC/DC transducer 40 are integrated in the interior formation of LED module box body 50 LED module, the assembled formation LED display of a plurality of LED modules.Wherein, a LED shows that module 20 comprises a plurality of LED lamp pearls, a DC/DC transducer 40 connects a LED and shows that module 20 forms a luminous combination, the first direct voltage of AC/DC transducer 30 outputs is that a plurality of LED show module 20 power supplies, and each LED shows between module 20 for being connected in parallel.

Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalency range thereof.

Claims

1. a LED display electric power system, comprise that main distribution cabinet and LED show module, it is characterized in that, described LED display electric power system also comprises that the alternating current that connects and main distribution cabinet is provided is converted to the AC/DC transducer of the first direct voltage, and is connected in described AC/DC transducer and LED shows between module, described the first direct voltage is transformed and is reduced to the DC/DC transducer that driving LED shows the second direct voltage of module work.

2. LED display electric power system as claimed in claim 1, is characterized in that, described AC/DC transducer is alternating current to be converted into the AC/DC transducer of the first direct voltage in predetermined voltage range.

3. LED display electric power system as claimed in claim 1, is characterized in that, described DC/DC transducer is that the first direct voltage is transformed and is reduced to the DC/DC transducer that shows the second direct voltage of module normal operation for LED.

4. LED display electric power system as claimed in claim 1, is characterized in that, LED shows that module, DC/DC transducer are integrated in formation LED module in LED module box body.

5. LED display electric power system as claimed in claim 4, is characterized in that, the assembled formation LED display of a plurality of LED modules.