WO2021012848A1 - 一种 led 显示屏节能供电电路及显示屏 - Google Patents

一种 led 显示屏节能供电电路及显示屏 Download PDF

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Publication number
WO2021012848A1
WO2021012848A1 PCT/CN2020/096897 CN2020096897W WO2021012848A1 WO 2021012848 A1 WO2021012848 A1 WO 2021012848A1 CN 2020096897 W CN2020096897 W CN 2020096897W WO 2021012848 A1 WO2021012848 A1 WO 2021012848A1
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Prior art keywords
power supply
led lamp
lamp bead
display screen
energy
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Application number
PCT/CN2020/096897
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English (en)
French (fr)
Inventor
王朝
王爱武
韦吉照
李全波
肖湘德
汪志南
Original Assignee
深圳蓝普科技有限公司
深圳市上隆智控科技有限公司
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Application filed by 深圳蓝普科技有限公司, 深圳市上隆智控科技有限公司 filed Critical 深圳蓝普科技有限公司
Publication of WO2021012848A1 publication Critical patent/WO2021012848A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits

Definitions

  • This application relates to the technical field of control systems, in particular to an energy-saving power supply circuit for an LED display screen and a display screen.
  • the LED display is a large-scale display composed of multiple display modules spliced in various ways. It can display text, images, videos and other media information by controlling the light-emitting diodes. LED lights are a more efficient light source, but LED displays often contain tens of thousands of LED lights, and their power consumption per square meter is still high. Take outdoor, full-color LED displays with a pixel pitch of 10mm as an example. The power is close to 1000-1200w/m2; at the same time, as a current-type device, the LED lamp will generate a lot of heat when it works. This heat not only means waste and inefficiency of energy, but also reduces the service life of the LED lamp. To a large extent affect the display effect of the LED display.
  • the LED light of the full-color display is packaged by three light-emitting diodes of red, green, and blue.
  • the anodes of the three light-emitting diodes are connected to each other. They usually use 5V power supply (that is, the red, green and blue light-emitting diodes The anode supplies the same voltage).
  • 5V voltage When using 5V voltage to power LED lights, the current will often reach tens of amperes, and some of the voltage will inevitably be lost in the wire, resulting in energy loss; the voltage is applied to the red, green, and blue light circuits, and the red light works
  • the voltage is about 2.2V, and the working voltage of the green and blue lights is about 3.2V.
  • the voltage drop in the red light driver IC is higher, and the driving IC
  • the heat is positively related to its voltage drop, which makes the entire LED circuit generate high heat, which makes the LED display high power consumption, and the display effect becomes worse due to the influence of temperature rise.
  • the heat dissipation design of the display requires a high cost.
  • the voltage drop in the red light driver IC is higher, and the heat generation of the driver IC is positively correlated with its voltage drop, which makes the entire LED circuit generate high heat, which makes the LED
  • the display power consumption is high, and the display effect is deteriorated due to the influence of temperature rise, and the heat dissipation design of the display requires a high cost.
  • the main purpose of this application is to provide an energy-saving power supply circuit and display for LED display screens, which can reduce power consumption and improve display effects by accurately supplying power to different colored lights.
  • an energy-saving power supply circuit for LED display screens includes: a first power supply, a second power supply, a line tube IC, a red LED lamp bead, a red LED lamp bead driver IC, and a blue LED lamp bead, Blue LED lamp bead driver IC;
  • the first power source is connected to the anode of the red LED lamp bead through the line tube IC, and the cathode of the red LED lamp bead is connected back to the first power source through the red LED lamp bead driving IC;
  • the second power source is connected to the anode of the blue LED lamp bead through the line tube IC, and the cathode of the blue LED lamp bead is connected back to the second power source through the blue LED lamp bead driving IC.
  • both the first power supply and the second power supply are DC power supplies.
  • both the first power source and the second power source are AC power sources.
  • the first power supply and the second power supply are respectively a first DC converter and a second DC converter, and the power supply circuit further includes a DC power supply;
  • the input terminal of the first DC converter and the input terminal of the second DC converter are connected to a DC power supply; the positive output terminal of the first DC converter is connected to the positive output terminal of the second DC converter One end of the line tube IC.
  • it further includes a green LED lamp bead and a green LED lamp bead driving IC; the anode of the green LED lamp bead is connected to the second power source through the line tube IC, and the cathode of the green LED lamp bead passes through all
  • the green LED lamp bead driving IC is connected back to the second power source.
  • the positive potential of the output terminal of the first power supply is the same as the positive potential of the output terminal of the second power supply.
  • the negative electrode of the output terminal of the first DC converter is connected to the GND potential of the red LED lamp bead driving IC.
  • the negative electrode of the output terminal of the second DC converter is connected to the GND potential of the blue LED lamp bead driving IC.
  • the line tube IC is also connected with line control signals.
  • the red LED lamp bead drive IC is also connected with a red control signal; the green LED lamp bead drive IC is also connected with a green control signal; the blue LED lamp bead drive IC is also connected with a blue control signal .
  • the models of the first DC converter and the second DC converter are both LM2596.
  • an LED display screen including the above-mentioned energy-saving power supply circuit for the LED display screen.
  • the circuit includes: a first power supply, a second power supply, a line tube IC, a red LED lamp bead, a red LED lamp bead driver IC, and a blue LED lamp bead, Blue LED lamp bead driver IC; wherein, the first power supply is connected to the anode of the red LED lamp bead through the line tube IC, and the cathode of the red LED lamp bead is connected through the red LED lamp bead drive IC Back to the first power supply; the second power supply is connected to the anode of the blue LED lamp bead through the line tube IC, and the cathode of the blue LED lamp bead is connected through the blue LED lamp bead drive IC Back to the second power supply; by accurately supplying power to the lights of different colors, the power consumption is reduced and the display effect is improved.
  • FIG. 1 is a circuit diagram of an energy-saving power supply circuit for an LED display screen provided in Embodiment 1 of the application.
  • module means, “component” or “unit” used to indicate elements is only for the description of the present application, and has no specific meaning in itself. Therefore, “module”, “part” or “unit” can be used in a mixed manner.
  • an energy-saving power supply circuit for an LED display screen including: a first power supply, a second power supply, a line tube IC, a red LED lamp bead, a red LED lamp bead driving IC, and a blue Color LED lamp beads, blue LED lamp beads driver IC;
  • the first power source is connected to the anode of the red LED lamp bead through the line tube IC, and the cathode of the red LED lamp bead is connected back to the first power source through the red LED lamp bead driving IC;
  • the second power source is connected to the anode of the blue LED lamp bead through the line tube IC, and the cathode of the blue LED lamp bead is connected back to the second power source through the blue LED lamp bead driving IC.
  • a single power supply is used to accurately power the lamps of different colors, which reduces power consumption and improves the display effect.
  • the power supply circuit further includes a DC power source, and the first power source and the second power source are respectively a first DC converter and a second DC converter;
  • the input terminal of the first DC converter and the input terminal of the second DC converter are connected to a DC power supply; the positive output terminal of the first DC converter is connected to the positive output terminal of the second DC converter One end of the line tube IC.
  • it also includes a green LED lamp bead and a green LED lamp bead driver IC; the anode of the green LED lamp bead is connected to the second power source through the line tube IC, and the cathode of the green LED lamp bead
  • the green LED lamp bead driving IC is connected back to the second power source.
  • the anode of the output terminal of the first DC converter and the anode of the output terminal of the second DC converter are connected to one end of the line tube IC; the other end of the line tube IC is connected to the tricolor
  • the anodes of the LED lamp beads are connected together; the cathode of the red LED lamp bead is connected to the negative electrode of the output terminal of the first DC converter through the red LED lamp bead driving IC; the cathode of the green LED lamp bead is connected through the green LED lamp bead driving IC
  • the cathode of the blue LED lamp bead is connected to the cathode of the output end of the second DC converter through the blue LED lamp bead driving IC.
  • the first power source and the second power source are both DC power sources or AC power sources.
  • the control method is the same as the control principle in Fig. 1, and will not be repeated here.
  • the positive potential of the output terminal of the first power supply is the same as the positive potential of the output terminal of the second power supply.
  • the negative electrode potential of the output terminal of the second DC converter is adjusted so that the green LED lamp beads and the blue LED lamp beads obtain a preset second power supply voltage.
  • the GND of the red light driver IC is connected to the negative electrode of the output terminal of dc/dc1
  • the GND of the green and blue light driver IC is connected to the negative electrode of the output terminal of dc/dc2 so that the GND potential of the driver IC is connected to the corresponding dc/dc/
  • the negative potential of the output terminal of dc is the same.
  • the DC power supply is a 24V power supply, which is converted from 220V city power.
  • the 24V DC power supply and the control signal are transmitted on the same cable.
  • a longer film FPC cable is used to introduce the DC power supply into the display module.
  • Each display module is equipped with two DC converters, namely the first DC converter dc/dc1 and the second DC converter dc/dc2 shown in Figure 2.
  • the models of both DC converters are LM2596 , By controlling the potentials of the output terminals of the two DC converters (V0, V1, V2 shown in the figure) to achieve accurate power supply of red, green, and blue lamp beads. For example, you can set V1 to 1V, V2 to 0V, and V0 to 3.2V, so that the red light works at about 2.2V, and the green light and blue light work at about 3.2V.
  • the output terminals of the two DC converters are connected to the anodes of the three-color LED lamp beads through the line tube IC.
  • This solution does not need to customize the driver IC and LED lights, and can use conventional LED lights and Drive IC, and only need a 24V power supply and two DC converters. It has strong applicability, low cost and high feasibility.
  • the red light, green, and blue lights are provided.
  • the lamp provides a suitable voltage, which can effectively reduce the voltage drop of the constant current driver IC in the LED lamp driving circuit, thereby reducing heat loss and achieving energy-saving effects. At the same time, it also reduces the temperature rise and ensures the display effect of the LED display when it works for a long time. .
  • the row tube IC is also connected with row control signals.
  • the function of the line tube IC is to control the on and off of a certain line of LED lights through the line control signal, which can be regarded as a switch.
  • the red LED lamp bead drive IC is also connected with a red control signal; the green LED lamp bead drive IC is also connected with a green control signal; the blue LED lamp bead drive IC is also connected with blue control signal.
  • the positive potentials of the two dc/dc output terminals are the same as V0, which are introduced into the common anode LED lamp of the conventional package through the line tube IC, and the negative pole of the red light is connected after the driver IC.
  • the negative pole (V1) of the output terminal of dc/dc1 forms a loop.
  • the negative poles of the green and blue lights are connected to the negative pole (V2) of the output terminal of dc/dc2 through the driver IC to form a loop.
  • the red, green, and blue lights can obtain more suitable power supply voltages by controlling the sizes of V0, V1, and V2, thereby reducing the voltage of the red, blue, and green light loops on the constant current drive IC. drop.
  • the voltage drop of the constant current driver IC in the red light circuit is lower than the voltage drop of the driver IC in the blue-green light circuit due to the input of a more suitable voltage V0 and the elevation of the potential V1 in this embodiment;
  • a more suitable voltage V0 also reduces the voltage drop of the constant current driver IC in the green and blue light circuits, thereby reducing the heating of the driver IC, thereby achieving the effect of energy saving.
  • the positive poles of the two dc/dc output terminals are introduced into the common anode LED lamp of the conventional package through the line tube IC.
  • the package contains several groups of RGB lamp beads, and the negative poles of all red lights pass through the driver IC. Connect the negative pole (V1) of the output terminal of dc/dc1 to form a loop. Similarly, the negative poles of all green and blue lights pass through the driver IC and then connect to the negative pole (V2) of the output terminal of dc/dc2 to form a loop.
  • the current in the wire line of the LED display energy-saving power supply circuit is only 20% of the current of the 5V power supply scheme, so that the wire loss will be greatly reduced; by controlling the output positive and negative electrodes of the two dc/dc converters Potential to provide appropriate voltages for the red, green and blue lights, which can effectively reduce the voltage drop of the constant current drive IC in the LED lamp drive circuit, thereby reducing heat loss and achieving energy-saving effects, while also reducing temperature rise and ensuring LED display The display effect when the screen is working for a long time.
  • an LED display screen includes the energy-saving power supply circuit for the LED display screen described in the first embodiment.
  • a single power supply is used to accurately power the different color lights of the LED display, which reduces power consumption and improves the display effect.
  • the method of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. ⁇
  • the technical solution of this application essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.
  • the circuit includes: a first power supply, a second power supply, a line tube IC, a red LED lamp bead, a red LED lamp bead driver IC, and a blue LED lamp bead, Blue LED lamp bead driver IC; wherein, the first power supply is connected to the anode of the red LED lamp bead through the line tube IC, and the cathode of the red LED lamp bead is connected through the red LED lamp bead drive IC Back to the first power supply; the second power supply is connected to the anode of the blue LED lamp bead through the line tube IC, and the cathode of the blue LED lamp bead is connected through the blue LED lamp bead drive IC Back to the second power supply; a single power supply is used to accurately power the lights of different colors, which reduces power consumption and improves the display effect. Therefore, it has industrial applicability.

Abstract

一种LED显示屏节能供电电路及显示屏，涉及控制系统技术领域，电路包括：第一电源、第二电源、行管IC、红色LED灯珠、红色LED灯珠驱动IC和蓝色LED灯珠、蓝色LED灯珠驱动IC；其中，第一电源通过行管IC连接至红色LED灯珠的阳极，红色LED灯珠的阴极通过红色LED灯珠驱动IC连接回第一电源；第二电源通过行管IC连接至蓝色LED灯珠的阳极，蓝色LED灯珠的阴极通过蓝色LED灯珠驱动IC连接回第二电源。

Description

一种LED显示屏节能供电电路及显示屏 技术领域
本申请涉及控制系统技术领域，尤其涉及一种LED显示屏节能供电电路及显示屏。
 背景技术
LED显示屏是由多块显示模组通过各种不同的方式拼接而成的大型显示器，它通过控制发光二极管的发光来实现文字、图像、视频等各种媒介信息的显示。LED灯是一种较为高效的光源，但是LED显示屏往往包含有数万个LED灯，其每平米功耗依然较高，以户外、全彩色、像素点间距10mm的LED显示屏为例，其功率接近1000-1200w/㎡；同时，LED灯作为一种电流型器件，其工作时会产生大量的热，这些热量不仅意味着能源的浪费与低效，而且还会降低LED灯的使用寿命，在很大程度上影响LED显示屏的显示效果。
全彩显示屏的LED灯是由红、绿、蓝三个发光二极管封装而成，三个发光二极管的阳极相互导通，通常使用5V电压供电（即给红、绿、蓝三种发光二极管的阳极供应相同的电压）。当使用5V电压为LED灯供电时，电流往往会达到几十安培，线材中不可避免的会损耗一部分电压，产生能量损失；电压作用到红灯、绿灯、蓝灯的电路中，红灯的工作电压在2.2V左右，绿灯和蓝灯的工作电压在3.2V左右，由于红灯的导通电压更低，在红灯电路中，红灯驱动IC中的压降更高，而驱动IC的发热量与其压降成正相关，使得整个LED线路产生很高热量，使得LED显示屏功耗高，且显示效果因温升的影响而变差，显示屏的散热设计需要投入很高的成本。
 技术问题
由于红灯的导通电压更低，在红灯电路中，红灯驱动IC中的压降更高，而驱动IC的发热量与其压降成正相关，使得整个LED线路产生很高热量，使得LED显示屏功耗高，且显示效果因温升的影响而变差，显示屏的散热设计需要投入很高的成本。
 技术解决方案
本申请的主要目的在于提出一种LED显示屏节能供电电路及显示屏，通过为不同色灯精确供电，降低了功耗，提高了显示效果。
为实现上述目的，本申请提供的一种LED显示屏节能供电电路，包括：第一电源、第二电源、行管IC、红色LED灯珠、红色LED灯珠驱动IC和蓝色LED灯珠、蓝色LED灯珠驱动IC；
其中，所述第一电源通过所述行管IC连接至所述红色LED灯珠的阳极，所述红色LED灯珠的阴极通过所述红色LED灯珠驱动IC连接回所述第一电源；
所述第二电源通过所述行管IC连接至所述蓝色LED灯珠的阳极，所述蓝色LED灯珠的阴极通过所述蓝色LED灯珠驱动IC连接回所述第二电源。
可选地，所述第一电源、第二电源皆为直流电源。
可选地，所述第一电源、第二电源皆为交流电源。
可选地，所述第一电源、第二电源分别为第一直流变换器和第二直流变换器，所述供电电路还包括直流电源；
所述第一直流变换器的输入端和第二直流变换器的输入端连接至直流电源；所述第一直流变换器的输出端正极与所述第二直流变换器的输出端正极连接所述行管IC的一端。
可选地，还包括绿色LED灯珠和绿色LED灯珠驱动IC；所述绿色LED灯珠的阳极通过所述行管IC连接至所述第二电源，所述绿色LED灯珠的阴极通过所述绿色LED灯珠驱动IC连接回所述第二电源。
可选地，所述第一电源的输出端正极电位和所述第二电源的输出端正极电位相同。
可选地，第一直流变换器的输出端负极与所述红色LED灯珠驱动IC的GND电位连接。
可选地，第二直流变换器的输出端负极与所述蓝色LED灯珠驱动IC的GND电位连接。
可选地，所述行管IC还连接有行控制信号。
可选地，所述红色LED灯珠驱动IC还连接有红色控制信号；所述绿色LED灯珠驱动IC还连接有绿色控制信号；所述蓝色LED灯珠驱动IC还连接有蓝色控制信号。
可选地，所述第一直流变换器和所述第二直流变换器的型号皆为LM2596。
作为本申请的另一方面，提供的一种LED显示屏，包括上述的LED显示屏节能供电电路。
 有益效果
本申请提出的一种LED显示屏节能供电电路及显示屏，该电路包括：第一电源、第二电源、行管IC、红色LED灯珠、红色LED灯珠驱动IC和蓝色LED灯珠、蓝色LED灯珠驱动IC；其中，所述第一电源通过所述行管IC连接至所述红色LED灯珠的阳极，所述红色LED灯珠的阴极通过所述红色LED灯珠驱动IC连接回所述第一电源；所述第二电源通过所述行管IC连接至所述蓝色LED灯珠的阳极，所述蓝色LED灯珠的阴极通过所述蓝色LED灯珠驱动IC连接回所述第二电源；通过为不同色灯精确供电，降低了功耗，提高了显示效果。
 附图说明
图1为本申请实施例一提供的一种LED显示屏节能供电电路的电路图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
 本发明的实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了有利于本申请的说明，其本身没有特定的意义。因此，“模块”、“部件”或“单元”可以混合地使用。
实施例一
如图1所示，在本实施例中，提供的一种LED显示屏节能供电电路，包括：第一电源、第二电源、行管IC、红色LED灯珠、红色LED灯珠驱动IC和蓝色LED灯珠、蓝色LED灯珠驱动IC；
其中，所述第一电源通过所述行管IC连接至所述红色LED灯珠的阳极，所述红色LED灯珠的阴极通过所述红色LED灯珠驱动IC连接回所述第一电源；
所述第二电源通过所述行管IC连接至所述蓝色LED灯珠的阳极，所述蓝色LED灯珠的阴极通过所述蓝色LED灯珠驱动IC连接回所述第二电源。
在本实施例中，通过单电源为不同色灯精确供电，降低了功耗，提高了显示效果。
在本实施例中，如图1所示，所述供电电路还包括直流电源，所述第一电源、第二电源分别为第一直流变换器和第二直流变换器；
所述第一直流变换器的输入端和第二直流变换器的输入端连接至直流电源；所述第一直流变换器的输出端正极与所述第二直流变换器的输出端正极连接所述行管IC的一端。
在本实施例中，还包括绿色LED灯珠和绿色LED灯珠驱动IC；所述绿色LED灯珠的阳极通过所述行管IC连接至所述第二电源，所述绿色LED灯珠的阴极通过所述绿色LED灯珠驱动IC连接回所述第二电源。
在本实施例中，所述第一直流变换器的输出端正极与所述第二直流变换器的输出端正极一起连接至行管IC的一端；所述行管IC的另一端与三色LED灯珠的阳极连接在一起；红色LED灯珠的阴极通过红色LED灯珠驱动IC与所述第一直流变换器的输出端负极连接；绿色LED灯珠的阴极通过绿色LED灯珠驱动IC与所述第二直流变换器的输出端负极连接；蓝色LED灯珠的阴极通过蓝色LED灯珠驱动IC与所述第二直流变换器的输出端负极连接。
作为另一种实施例，所述第一电源、第二电源皆为直流电源或交流电源。其控制方式与图1中控制原理相同，兹不赘述。
在本实施例中，所述第一电源的输出端正极电位和所述第二电源的输出端正极电位相同。
调整所述第一直流变换器的输出端负极电位，使所述红色LED灯珠获得预设的第一供电电压；
调整所述第二直流变换器的输出端负极电位，使所述绿色LED灯珠和蓝色LED灯珠获得预设的第二供电电压。
在本实施例中，红灯驱动IC的GND与dc/dc1的输出端负极相连，绿、蓝灯驱动IC的GND与dc/dc2的输出端负极相连，使驱动IC的GND电位与对应dc/dc的输出端负极电位一致。
在本实施例中，所述直流电源为24V电源，由220V市电变换而来，24V直流电源与控制信号同缆传输，利用较长的薄膜FPC电缆将所述直流电源引入显示模组，在每个显示模组内设置两个直流变换器，也即图2中所示的第一直流变换器dc/dc1和第二直流变换器dc/dc2，两个直流变换器的型号皆为LM2596，通过控制两个直流变换器的输出端正负极（图中所示的V0，V1，V2）的电位来实现红、绿、蓝灯珠的精确供电。例如，可以使V1为1V，V2为0V，V0为3.2V，这样就使得红灯的工作在2.2V电压左右，绿灯和蓝灯的工作在3.2V电压左右。
在本实施例中，两个直流变换器的输出端通过行管IC与三色LED灯珠的阳极连接在一起，本方案不需要对驱动IC和LED灯进行定制，可以使用常规的LED灯及驱动IC，且只需要一个24V电源和两个直流变换器，适用性强，成本低，可行性高，通过控制两个dc/dc变换器的输出正负极电位来给红灯及绿、蓝灯提供合适的电压，可以有效减少LED灯驱动电路中恒流驱动IC的压降，进而减少热量损耗，达到节能的效果，同时也减少了温升，保证LED显示屏长时间工作时的显示效果。
在本实施例中，所述行管IC还连接有行控制信号。行管IC的作用是通过所述行控制信号控制某行LED灯的亮灭，可看作为开关。
在本实施例中，所述红色LED灯珠驱动IC还连接有红色控制信号；所述绿色LED灯珠驱动IC还连接有绿色控制信号；所述蓝色LED灯珠驱动IC还连接有蓝色控制信号。
在本实施例中，如图1所示，两个dc/dc的输出端正极电位同为V0，经过行管IC导入到常规封装的共阳极LED灯中，红灯的负极经过驱动IC后接到dc/dc1的输出端负极（V1）形成回路，同理绿、蓝灯的负极经过驱动IC后接到dc/dc2的输出端负极（V2）形成回路。通过控制两个dc/dc，使dc/dc1的输出端负极电位V1比dc/dc2的输出端负极电位V2高（如V1=1V，V2=0），而其输出端正极同为V0=3.2V，这样一来，可以通过控制V0、V1、V2的大小使得红绿蓝三色灯分别获得更合适的供电电压，依此来减少红、蓝、绿灯的回路在恒流驱动IC上的压降。相对于传统供电方案，由于本实施例输入了更合适的电压V0以及电位V1的抬高使红灯电路中恒流驱动IC的压降比蓝绿灯电路中驱动IC的压降更低；同理更合适的电压V0也使绿、蓝灯电路中恒流驱动IC的压降减少，从而减少驱动IC的发热，进而达到节能的效果。
作为另一种实施例，两个dc/dc的输出端正极经过行管IC导入到常规封装的共阳极LED灯中，在封装中包含若干组RGB灯珠，所有红灯的负极经过驱动IC后接到dc/dc1的输出端负极（V1）形成回路，同理，所有绿、蓝灯的负极经过驱动IC后接到dc/dc2的输出端负极（V2）形成回路。
在本实施例中，LED显示屏节能供电电路中线材线路中的电流仅为5V供电方案电流的20%，使得其线材损耗会大大减少；通过控制两个dc/dc变换器的输出正负极电位来给红灯及绿、蓝提供合适的电压，可以有效减少LED灯驱动电路中恒流驱动IC的压降，进而减少热量损耗，达到节能的效果，同时也减少了温升，保证LED显示屏长时间工作时的显示效果。
实施例二
在本实施例中，一种LED显示屏，包括实施例一所述的LED显示屏节能供电电路。通过单电源为LED显示屏的不同色灯精确供电，降低了功耗，提高了显示效果。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质（如ROM/RAM、磁碟、光盘）中，包括若干指令用以使得一台终端（可以是手机，计算机，服务器，空调器，或者网络设备等）执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本申请的保护之内。
 工业实用性
本申请提出的一种LED显示屏节能供电电路及显示屏，该电路包括：第一电源、第二电源、行管IC、红色LED灯珠、红色LED灯珠驱动IC和蓝色LED灯珠、蓝色LED灯珠驱动IC；其中，所述第一电源通过所述行管IC连接至所述红色LED灯珠的阳极，所述红色LED灯珠的阴极通过所述红色LED灯珠驱动IC连接回所述第一电源；所述第二电源通过所述行管IC连接至所述蓝色LED灯珠的阳极，所述蓝色LED灯珠的阴极通过所述蓝色LED灯珠驱动IC连接回所述第二电源；通过单电源为不同色灯精确供电，降低了功耗，提高了显示效果。因此，具有工业实用性。

Claims (12)

  1. 一种LED显示屏节能供电电路，包括：第一电源、第二电源、行管IC、红色LED灯珠、红色LED灯珠驱动IC和蓝色LED灯珠、蓝色LED灯珠驱动IC；
    其中，所述第一电源通过所述行管IC连接至所述红色LED灯珠的阳极，所述红色LED灯珠的阴极通过所述红色LED灯珠驱动IC连接回所述第一电源；
    所述第二电源通过所述行管IC连接至所述蓝色LED灯珠的阳极，所述蓝色LED灯珠的阴极通过所述蓝色LED灯珠驱动IC连接回所述第二电源。
  2. 根据权利要求1所述的一种LED显示屏节能供电电路，其中，所述第一电源、第二电源皆为直流电源。
  3. 根据权利要求1所述的一种LED显示屏节能供电电路，其中，所述第一电源、第二电源皆为交流电源。
  4. 根据权利要求1所述的一种LED显示屏节能供电电路，其中，所述第一电源、第二电源分别为第一直流变换器和第二直流变换器，所述供电电路还包括直流电源；
    所述第一直流变换器的输入端和第二直流变换器的输入端连接至直流电源；所述第一直流变换器的输出端正极与所述第二直流变换器的输出端正极连接所述行管IC的一端。
  5. 根据权利要求1所述的一种LED显示屏节能供电电路，其中，还包括绿色LED灯珠和绿色LED灯珠驱动IC；所述绿色LED灯珠的阳极通过所述行管IC连接至所述第二电源，所述绿色LED灯珠的阴极通过所述绿色LED灯珠驱动IC连接回所述第二电源。
  6. 根据权利要求1所述的一种LED显示屏节能供电电路，其中，所述第一电源的输出端正极电位和所述第二电源的输出端正极电位相同。
  7. 根据权利要求4所述的一种LED显示屏节能供电电路，其中，第一直流变换器的输出端负极与所述红色LED灯珠驱动IC的GND电位连接。
  8. 根据权利要求4所述的一种LED显示屏节能供电电路，其中，第二直流变换器的输出端负极与所述蓝色LED灯珠驱动IC的GND电位连接。
  9. 根据权利要求1所述的一种LED显示屏节能供电电路，其中，所述行管IC还连接有行控制信号。
  10. 根据权利要求5所述的一种LED显示屏节能供电电路，其中，所述红色LED灯珠驱动IC连接有红色控制信号；所述绿色LED灯珠驱动IC连接有绿色控制信号；所述蓝色LED灯珠驱动IC连接有蓝色控制信号。
     
  11. 根据权利要求4所述的一种LED显示屏节能供电电路，其中，所述第一直流变换器和所述第二直流变换器的型号皆为LM2596。
  12. 一种LED显示屏，其中，包括权利要求1-11任一项所述的LED显示屏节能供电电路。
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