CN202584684U

CN202584684U - LED energy-saving display screen

Info

Publication number: CN202584684U
Application number: CN2012200739024U
Authority: CN
Inventors: 薛锋
Original assignee: SHANGHAI SHILAN ELECTRONIC NEW TECHNOLOGY Co Ltd
Current assignee: SHANGHAI SHILAN ELECTRONIC NEW TECHNOLOGY Co Ltd
Priority date: 2012-03-01
Filing date: 2012-03-01
Publication date: 2012-12-05
Anticipated expiration: 2022-03-01

Abstract

The utility model discloses an LED energy-saving display screen, belonging to the technical field of the display screens. A driving power supply which supplies power is connected with a driving module, the driving module is connected with a display unit board, the display unit board is connected with an IC controller, and the IC controller is also connected with the driving module. The driving power supply employs power supplies with high power factors; and the display unit board is composed of multiple LED chip arrays, wherein LED chips employ energy-saving ICs which are specially designed for LED display screens. The display unit board is supplied by a 3.3V and a 5V power supplies, an TTL is independent, and lamp-driving separation and lamp-lamp separation manners are adopted, so that the working voltage of a red light tube differs from that of a green light tube when the red and the green light tubes are practically conducted. The LED chips are equipped with a working mode, a sleep mode, and a zero data mode. According to the utility model, driving ICs with low power consumption are adopted, rectification circuits of the driving power supply are re-optimized, different power supplies are used for supplying power, and the total power consumption can be reduced to about 35%.

Description

The energy-conservation display screen of a kind of LED

Technical field

The utility model relates to a kind of display screen, is specially the energy-conservation display screen of a kind of LED, belongs to electronic technology field.

Background technology

Nowadays along with the development of society; Energy power problems comes into one's own day by day, and energy-saving and environmental protection are brought into schedule, and LED showed that industry requirement also was progressively to improve for developing rapidly in recent years; LED display is as a kind of brightness is high, WV is low, power consumption is little, miniaturization, the life-span is long, shock-resistant and the show tools of stable performance; Be widely used in public in order to various information such as display text, figure, image, animation, market, video, video signals, up to a hundred square metres easily of at present a lot of large LED display screens, maximum power dissipation of its whole screen has also reached terrified up to a hundred kilowatts; Even more, become the power consumption rich and influential family.

At present to use more is conventional single, double look display screen to display screen widely, this part, and the area of monolithic display screen possibly be several squares not to be waited to tens square metres; But the use amount of entire society is very huge; Every square normal average power consumption is about 300 watts (P3.75mm), and only the use total amount of the conventional screen in Shanghai is just more than 10,000 square metres, if these display screens all open total power consumption 3000KW per hour more than; Such energy consumption reaches suitable surprising stage.

Summary of the invention

In order to solve problem and the deficiency that exists in the prior art, the utility model provides a kind of LED energy-conservation display screen, reduces the energy consumption of display screen, can reduce the power consumption of display screen about 35%.

The purpose of the utility model is to realize through following technical scheme

The energy-conservation display screen of a kind of LED; Mainly constitute by IC controller, driving power, driver module, display unit plate; Driving power provides electric energy, and driving power is connected with driver module, and driver module connects the display unit plate; The display unit plate also connects the IC controller, and the IC controller also connects driver module.

Described IC controller connects control Driver Circuit and display unit plate, the content on the control card control display unit plate.

Described driving power; Adopt high-power factor power supply; Total 3.3V and two power supplys of 5V connect the forceful electric power terminal respectively, behind red tube drive circuit and green tube drive circuit, are respectively the power supply of red light pipe and green light pipe; High-power factor power supply possesses PFC and circuit of synchronous rectification, and power factor (PF) reaches more than 90%.

Described display unit plate; Constitute by a plurality of led chip arrays; Led chip adopts the energy-conservation IC that aims at the LED display design; Energy-conservation IC can be product and saves energy consumption and can reach more than 25%, and the energy saver mode of chip itself makes display screen when not needing display frame or information, drops to the power consumption of display screen minimum.

The display unit plate adopts 3.3V, 5V power supply, and TTL is independent separately, adopts lamp to drive and separates the mode of separating with the lamp lamp; Difference because of luminescent device; Actual conducting WV red, the green light pipe adopts different voltages, and divider resistance in addition, optimizes circuit simultaneously and removes unnecessary device; Directly drive the energy consumption that further reduces.

Said red tube drive circuit adopts 3.3V voltage; Green tube drive circuit adopts 5V voltage; Red tube drive circuit chip for driving pin P23 meets a divider resistance RR, and pin P1 is the common signal end, a connect electric capacity and add 3.3V voltage of divider resistance RR; Pin P2, P3, P4 meet pin P18, P3 and P4, P5 and the P6 of control chip respectively; Pin P22 meets the pin P2 of another chip for driving, and other pins A5～A20 connects red pipe led chip pin respectively, and the signal that the pin P2 of last chip for driving connects controller adopts end; Green tube drive circuit chip for driving pin P23 meets a divider resistance RG; Pin P1 is the common signal end; Pin P2, P3, P4 meet pin P17, P3 and P4, P5 and the P6 of control chip respectively; Pin P22 meets the pin P2 of another chip for driving, and other pins A5～A20 connects green pipe led chip pin respectively, and the signal that the pin P2 of last chip for driving connects controller adopts end.

Led chip has mode of operation, sleep pattern and zero data form, and display screen can be reduced to chip power consumption less than 0.1 microampere when not needing display frame or information when sleep pattern and zero data form, and is littler 40 times than common IC.

The forceful electric power power supply is come in from the forceful electric power terminal, is connected respectively to the driving power of 3.3v and 5v, is giving display unit plate and control card through power supply after the conversion of driving power; Control card will send to content to display on the cell board and show; Capital that can't be all when showing because of the monoblock display screen in this process shows have a lot of lamp points can not lighted, especially in the marginal portion of display screen; Some in addition basic just be not shown; At this time, drive IC will get into energy-saving mode, in case the signal system of coming that has requirement to show can wake it up again automatically.

The utility model is selected the drive IC of low power consuming for use, and energy consumption when being reduced in work is optimized the driving power rectification circuit more again; Improve the power factor of power supply, lower its reactive power at work, improve the service efficiency of power supply; To different luminescent devices, use different power supply power supplies, reduce voltage; It is about 25% directly to reduce the power consumption of LED display once more, and the utility model can whole be reduced in the power consumption about 35%.

Description of drawings

The structured flowchart of Fig. 1 the utility model

Fig. 2 is the green pipe driving principle of the utility model figure

Fig. 3 is the red pipe driving principle of the utility model figure

Among the figure: 1-IC controller, 2-display unit plate, 3, the 30-driving power, 4-frame, 5-connecting line, 6-forceful electric power terminal.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described

Embodiment as shown in Figure 1, the energy-conservation display screen of a kind of LED mainly is made up of IC controller, driving power, driver module, display unit plate, frame and forceful electric power terminal; The forceful electric power terminal connects driving power, and the display unit plate is fixed in the frame, and driving power provides electric energy; Driving power is connected with driver module; Driver module connects the display unit plate through connecting line, and the display unit plate also connects the IC controller, and the IC controller also connects driver module.

Further, described driving power adopts high-power factor power supply; Total 3.3V and two power supplys of 5V connect the forceful electric power terminal respectively, are respectively the power supply of red light pipe and green light pipe; High-power factor power supply possesses PFC and circuit of synchronous rectification, and power factor (PF) reaches more than 90%.

Said circuit of synchronous rectification is a power MOSFET like Q1, at the positive half cycle of secondary voltage, and the Q1 conducting, Q1 plays rectified action; At the negative half period of secondary voltage, Q1 turn-offs, and the power attenuation of circuit of synchronous rectification mainly comprises conduction loss and the gate drive loss of Q1, and when switching frequency was lower than 60KHz, conduction loss was occupied an leading position; When switching frequency is higher than 60KHz, be main, when the AC/DC transducer of design low-voltage, big electric current output with gate drive loss; Adopt synchronous rectification can show the raising power-efficient, even up to 95%, when driving more powerful synchronous rectifier; When requiring grid peak drive current IG (PK) >=1A; Also can adopt CMOS high-speed power mosfet driver, power supply is can voltage be reduced to the required voltage value to LED display to adopt synchronous rectification, and the efficient of power supply also can reach the value of general supply voltage switch simultaneously; Therefore power supply is to reach significantly energy-conservation effect to LED display to adopt synchronous rectification; Effectively cut down the consumption of energy, the equally distributed power supply mode of a plurality of switchette power supplys further improves the energy conversion efficiency of Switching Power Supply.

Described display unit plate; Constitute by a plurality of led chips (drive IC) array; Led chip adopts the energy-conservation IC that aims at the LED display energy-conserving product and measure the body design; Energy-conservation IC can be product and saves energy consumption and can reach more than 25%, and the energy saver mode of chip itself makes display screen when not needing display frame or information, drops to the power consumption of display screen minimum.

Described display unit plate adopts 3.3V, 5V power supply, and TTL is independent separately, adopts lamp to drive and separates the mode of separating with the lamp lamp; Because of the difference of luminescent device, actual conducting WV red, the green light pipe is different, in addition divider resistance; Just make that electric energy form with heat energy on device of part loses; Optimize circuit simultaneously and remove unnecessary device, directly drive, the energy consumption that further reduces.

Further, like Fig. 2, shown in Figure 3, said red tube drive circuit adopts 3.3V voltage; Green tube drive circuit adopts 5V voltage; Red tube drive circuit chip for driving pin P23 meets a divider resistance RR, and pin P1 is the common signal end, a connect electric capacity and add 3.3V voltage of divider resistance RR; Pin P2, P3, P4 meet pin P18, P3 and P4, P5 and the P6 of control chip respectively; Pin P22 meets the pin P2 of another chip for driving, and other pins A5～A20 connects red pipe led chip pin respectively, and the signal that the pin P2 of last chip for driving connects controller adopts end; Green tube drive circuit chip for driving pin P23 meets a divider resistance RG; Pin P1 is the common signal end; Pin P2, P3, P4 meet pin P17, P3 and P4, P5 and the P6 of control chip respectively; Pin P22 meets the pin P2 of another chip for driving, and other pins A5～A20 connects green pipe led chip pin respectively, and the signal that the pin P2 of last chip for driving connects controller adopts end.

Further, led chip uses mode of operation, sleep pattern and zero data form, and display screen can be reduced to chip power consumption less than 0.1 microampere when not needing display frame or information when sleep pattern and zero data form, and is littler 40 times than common IC.

The utility model avoids the use of big power consumption components and parts such as high heating, high impedance also through optimizing trace arrangements, selects circuit and the alternative mode of components and parts with low driving voltage for use, reaches the purpose that cuts down the consumption of energy.

During work, the forceful electric power power supply is come in from the forceful electric power terminal, is connected respectively to the driving power of 3.3v and 5v; Giving display unit plate and control card through power supply after the conversion of driving power, control card will send to content to display on the cell board and show, and capital that can't be all when showing because of the monoblock display screen in this process shows; There is a lot of lamp points can not lighted; Especially in the marginal portion of display screen, some in addition just be not shown at all, at this time; Drive IC will get into energy-saving mode, in case the signal system of coming that has requirement to show can wake it up again automatically.

The utility model is selected the drive IC of low power consuming for use, and energy consumption when being reduced in work is optimized the driving power rectification circuit more again; Improve the power factor of power supply, lower its reactive power at work, improve the service efficiency of power supply; To different luminescent devices, use different power supply power supplies, reduce voltage; It is about 25% directly to reduce the power consumption of LED display once more, and the utility model can whole be reduced in the power consumption about 35%; Display screen with the p3.75mm dot spacing is an example, but every square meter energy efficient 150W, and one 10 square meter energy-saving LED display screen work one day 10 hours can energy efficient 15 degree, have made suitable positive effect for the conventional LED display of incomparable huge quantity is energy-conservation.

Claims

1. energy-conservation display screen of LED; Mainly be made up of IC controller, driving power, driver module, display unit plate, driving power provides electric energy, it is characterized in that; Driving power is connected with driver module; Driver module connects the display unit plate, and the display unit plate also connects the IC controller, and the IC controller also connects driver module.

2. the energy-conservation display screen of a kind of LED according to claim 1 is characterized in that, described IC controller connects control Driver Circuit and display unit plate, the content on the control card control display unit plate.

3. the energy-conservation display screen of a kind of LED according to claim 1; It is characterized in that described driving power adopts high-power factor power supply; Total 3.3V and two power supplys of 5V; Connect the forceful electric power terminal respectively, behind red tube drive circuit and green tube drive circuit, be respectively the power supply of red light pipe and green light pipe, high-power factor power supply possesses PFC and circuit of synchronous rectification.

4. the energy-conservation display screen of a kind of LED according to claim 1 is characterized in that, described display unit plate is made up of a plurality of led chip arrays, and led chip adopts the energy-conservation IC that aims at the LED display design.

5. the energy-conservation display screen of a kind of LED according to claim 1 is characterized in that, the display unit plate adopts 3.3V, 5V power supply, and TTL is independent separately, adopts lamp to drive and separates the mode of separating with the lamp lamp.

6. the energy-conservation display screen of a kind of LED according to claim 3 is characterized in that, said red tube drive circuit adopts 3.3V voltage; Green tube drive circuit adopts 5V voltage; Red tube drive circuit chip for driving pin P23 meets a divider resistance RR, and pin P1 is the common signal end, a connect electric capacity and add 3.3V voltage of divider resistance RR; Pin P2, P3, P4 meet pin P18, P3 and P4, P5 and the P6 of control chip respectively; Pin P22 meets the pin P2 of another chip for driving, and other pins A5～A20 connects red pipe led chip pin respectively, and the signal that the pin P2 of last chip for driving connects controller adopts end; Green tube drive circuit chip for driving pin P23 meets a divider resistance RG; Pin P1 is the common signal end; Pin P2, P3, P4 meet pin P17, P3 and P4, P5 and the P6 of control chip respectively; Pin P22 meets the pin P2 of another chip for driving, and other pins A5～A20 connects green pipe led chip pin respectively, and the signal that the pin P2 of last chip for driving connects controller adopts end.