CN103531144A - Wireless control full color LED display screen - Google Patents
Wireless control full color LED display screen Download PDFInfo
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- CN103531144A CN103531144A CN201310303902.8A CN201310303902A CN103531144A CN 103531144 A CN103531144 A CN 103531144A CN 201310303902 A CN201310303902 A CN 201310303902A CN 103531144 A CN103531144 A CN 103531144A
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Abstract
The invention relates to a wireless control full color LED display screen comprising a controller, a drive circuit and an LED unit board. The wireless control full color LED display screen is characterized in that the input end of the drive circuit is electrically connected with the controller. The output end of the drive circuit is electrically connected with the LED unit board. A bottom board of the LED unit board is evenly provided with LED devices. The bottom board of the LED unit board adopts a multilayered PCB circuit board. The bottom board of the LED unit board is respectively provided with a heat radiating layer. The controller comprises a communication module, a control module and a FLASH storage module. The control module, the communication module and the FLASH storage module are electrically connected in turn. The wireless control full color LED display screen is simple in the whole circuit structure. An adjustable voltage reference source is adopted to stabilize voltage so that production cost is reduced and the service life of the LED drive circuit is increased. The wireless control full color LED display screen can be operated in a wireless way so that a technical staff can perform corresponding operation without going to the onsite scene.
Description
Technical field
The present invention relates to a kind of LED display, particularly a kind of controlled in wireless full-color LED display screen.
Background technology
LED display is the large scale display system that integrates computer technology, photoelectron technology, microelectric technique, the information processing technology.LED display is by certain control mode, the display screen forming for the device array of the various information such as display text, figure, image, animation, market, video, video signal.In recent years, because semi-conductive making and processing technology are progressively ripe and perfect, light emitting diode (Light Emitting Diode, LED) is occupied an leading position increasingly in solid demonstration.Why in widespread attention it is and developed rapidly, be that the brightness that has with itself is high, operating voltage is low, power consumption is little, microminiaturizedly easily mate with integrated circuit, drive simply, the life-span is long, shock-resistant, steady performance is inseparable, and current just towards high brightness more, more high weather resistance, higher uniformity of luminance, higher reliability and panchromaticization future development.Therefore, the LED display being applied under outdoor scene is also more and more, so, if need to upgrade the displaying contents of LED display or the preset program of change LED display, need technician to operate to scene, make troubles to user's operation and maintenance.
Summary of the invention
In order to address the above problem, the invention provides a kind of full-color LED display screen with wireless communication function, make operating personnel needn't arrive scene and just can operate display screen.
A kind of controlled in wireless full-color LED display screen, comprise controller, driving circuit and LED cell board, it is characterized in that: the input end of described driving circuit is electrically connected at controller, the output terminal of driving circuit is electrically connected at LED cell board, on the base plate of described LED cell board, be evenly provided with LED device, the base plate of described LED cell board adopts multilayer PCB circuit board, the base plate of described LED cell board is respectively equipped with heat dissipating layer, described controller comprises communication module, control module, FLASH memory module, described control module, communication module and FLASH memory module are sequentially electrically connected, described driving circuit comprises DC output circuit and the LED illuminating circuit being comprised of input protection circuit and rectification circuit, also comprise metal-oxide-semiconductor turning circuit and mu balanced circuit, described metal-oxide-semiconductor turning circuit comprises high-voltage MOS pipe, the source electrode of described metal-oxide-semiconductor is connected with the negative pole of described DC output circuit and ground connection, and the drain and gate of described metal-oxide-semiconductor is all connected with the positive pole of described DC output circuit, described mu balanced circuit comprises adjustable voltage reference source, the positive pole of described adjustable voltage reference source is connected with the drain electrode of described metal-oxide-semiconductor, the negative pole of described adjustable voltage reference source is output terminal, be connected with described LED illuminating circuit, on the output terminal of described adjustable voltage reference source, be connected with feedback resistance, the reference edge of described adjustable voltage reference source is in parallel with described feedback resistance, between the grid of described metal-oxide-semiconductor and the positive pole of described DC output circuit, be connected with voltage stabilizing diode, the positive pole of described voltage stabilizing diode is connected with the grid of described metal-oxide-semiconductor, and the negative pole of described voltage stabilizing diode is connected with the positive pole of the positive pole of described DC output circuit, described adjustable voltage reference source, described feedback resistance is comprised of the 5th resistance and the 6th resistance, described the 5th resistance and described the 6th resistance are in parallel, one end of described the 5th resistance and described the 6th resistance is all connected with the output terminal of described adjustable voltage reference source, the other end of described the 5th resistance and described the 6th resistance is all connected with the grid of described metal-oxide-semiconductor, and is connected between the positive pole of described voltage stabilizing diode and the grid of described metal-oxide-semiconductor, described metal-oxide-semiconductor turning circuit comprises the heat sink resistance being connected between the positive pole of described DC output circuit and the grid of described metal-oxide-semiconductor, drain electrode, described heat sink resistance is comprised of the first resistance, the second resistance, the 3rd resistance, the 4th resistance, described the first resistance and described the second resistance are in parallel, described the 3rd resistance and described the 4th resistance are in parallel, and the parallel circuit that described the first resistance and described the second resistance form is connected with the parallel circuit that described the 3rd resistance and described the 4th resistance form, between the source electrode of described metal-oxide-semiconductor and ground, be connected with protective resistance, described metal-oxide-semiconductor is N channel enhancement metal-oxide-semiconductor, and described adjustable voltage reference source is three end adjustable shunt reference sources.
Described communication module is GPRS module or gsm module or WIFI module; Described heat dissipating layer is aluminium base or copper base or iron substrate or aluminium alloy base plate.
Beneficial effect of the present invention is as follows:
1. controller of the present invention comprises wireless communication module, for display screen has increased wireless communication function, makes technician needn't go to scene can carry out corresponding operating;
2. described LED cell board of the present invention is respectively equipped with heat dissipating layer, has solved the problem that too high picture element density produces a large amount of heats and then causes the life-span reduction of LED;
3. LED cell board of the present invention adopts multilayer PCB circuit board, has effectively reduced electromagnetic interference (EMI), has increased the area of dissipation of LED simultaneously.
4. the whole circuit structure of LED drive circuit of the present invention is simple, adopt adjustable voltage reference source to carry out voltage stabilizing, be beneficial to the reduction of production cost, in this circuit without using capacitor, can solve and because capacitor life-span is short, cause whole LED drive circuit not long problem in serviceable life, realize the LED drive circuit growth in serviceable life.
Accompanying drawing explanation
Fig. 1: structural representation of the present invention;
Fig. 2: driving circuit figure of the present invention.
1-controller, 11-communication module, 12-control module, 13-FLASH memory module;
2-driving circuit;
3-LED cell board.
Embodiment
The embodiment setting forth below represents and allows those skilled in the art to put into practice necessary information of the present invention, and illustrates and put into practice best mode of the present invention.Once read with reference to the accompanying drawings following description, those skilled in the art just will understand design of the present invention and will recognize the application of these designs of not illustrating especially herein.Should be appreciated that these designs and application fall into the scope of disclosure and the accompanying claims book.
As shown in Figure 1, a kind of controlled in wireless full-color LED display screen of the present invention, by controller 1, driving circuit 2, a plurality of LED cell boards 3 of being spliced to form display screen integral body, formed, the input end of described driving circuit 2 is electrically connected at controller 1, the output terminal of driving circuit 2 is electrically connected at LED cell board 3, on the base plate of described LED cell board 3, be evenly provided with LED device, the base plate of described LED cell board 3 adopts multilayer PCB circuit board, the base plate of described LED cell board 3 is respectively equipped with heat dissipating layer, and described heat dissipating layer is aluminium base or copper base or iron substrate or aluminium alloy base plate.Described controller 1 comprises communication module 11, control module 12, FLASH memory module 13, and described control module 12, communication module 11 and FLASH memory module 13 successively order are electrically connected.Described communication module 11 is GPRS module or gsm module or WIFI module, and described wireless communication module is GPRS module or gsm module or WIFI module; Described heat dissipating layer is aluminium base or copper base or iron substrate or aluminium alloy base plate.
Wherein, communication module 11 is responsible for the information of receiving remote main frame and is transmitted to control module 12 and FLASH memory module 13, the information that 13 storages of FLASH memory module receive from communication module 11, control module 12 is extracted corresponding command information according to preset program from FLASH memory module 13 canned datas, and then this display screen is operated accordingly.
As shown in Figure 2, described driving circuit 2 comprises DC output circuit and the LED illuminating circuit being comprised of input protection circuit and rectification circuit, also comprise metal-oxide-semiconductor turning circuit and mu balanced circuit, described metal-oxide-semiconductor turning circuit comprises high-voltage MOS pipe, the source electrode of described metal-oxide-semiconductor is connected with the negative pole of described DC output circuit and ground connection, and the drain and gate of described metal-oxide-semiconductor is all connected with the positive pole of described DC output circuit; Described mu balanced circuit comprises adjustable voltage reference source, the positive pole of described adjustable voltage reference source is connected with the drain electrode of described metal-oxide-semiconductor, the negative pole of described adjustable voltage reference source is output terminal, be connected with described LED illuminating circuit, on the output terminal of described adjustable voltage reference source, be connected with feedback resistance, the reference edge of described adjustable voltage reference source is in parallel with described feedback resistance; Between the grid of described metal-oxide-semiconductor and the positive pole of described DC output circuit, be connected with voltage stabilizing diode, the positive pole of described voltage stabilizing diode is connected with the grid of described metal-oxide-semiconductor, and the negative pole of described voltage stabilizing diode is connected with the positive pole of the positive pole of described DC output circuit, described adjustable voltage reference source; Described feedback resistance is comprised of the 5th resistance and the 6th resistance, described the 5th resistance and described the 6th resistance are in parallel, one end of described the 5th resistance and described the 6th resistance is all connected with the output terminal of described adjustable voltage reference source, the other end of described the 5th resistance and described the 6th resistance is all connected with the grid of described metal-oxide-semiconductor, and is connected between the positive pole of described voltage stabilizing diode and the grid of described metal-oxide-semiconductor; Described metal-oxide-semiconductor turning circuit comprises the heat sink resistance being connected between the positive pole of described DC output circuit and the grid of described metal-oxide-semiconductor, drain electrode; Described heat sink resistance is comprised of the first resistance, the second resistance, the 3rd resistance, the 4th resistance, described the first resistance and described the second resistance are in parallel, described the 3rd resistance and described the 4th resistance are in parallel, and the parallel circuit that described the first resistance and described the second resistance form is connected with the parallel circuit that described the 3rd resistance and described the 4th resistance form; Between the source electrode of described metal-oxide-semiconductor and ground, be connected with protective resistance; Described metal-oxide-semiconductor is N channel enhancement metal-oxide-semiconductor, and described adjustable voltage reference source is three end adjustable shunt reference sources.
In concrete operations, use LED full-colour display screen of the present invention to carry out operated from a distance:
When communication module 11 is GPRS module, on distance host, pass through GPRS transmission mode to the GPRS module transmission control command information of displaying screen controller 1, for example control display screen change and show character, by original " welcome ", change " welcome again " into, send order " welcome again for change character-", after receiving, GPRS module is transmitted to control module 12 and FLASH memory module 13, FLASH memory module 13 these control command information of storage, control module 12 is extracted order " change character " from this control command information according to preset program, and then display screen is operated, change the demonstration character of display screen into " welcome again ",
Same, when communication module 11 is gsm module, on distance host, pass through GSM transmission mode to the gsm module transmission control command information of displaying screen controller 1, after receiving, gsm module is transmitted to control module 12 and FLASH memory module 13, FLASH memory module 13 these control command information of storage, control module 12 is extracted order from this control command information according to preset program, and then display screen is operated accordingly;
Same, when communication module 11 is WIFI module, on distance host, pass through WIFI transmission mode to the WIFI module transmission control command information of displaying screen controller 1, after receiving, WIFI module is transmitted to control module 12 and FLASH memory module 13, FLASH memory module 13 these control command information of storage, control module 12 is extracted order from this control command information according to preset program, and then display screen is operated accordingly.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And these belong to apparent variation that spirit of the present invention extended out or change still among protection scope of the present invention.
Claims (2)
1. a controlled in wireless full-color LED display screen, comprise controller (1), driving circuit (2) and LED cell board (3), it is characterized in that: the input end of described driving circuit (2) is electrically connected at controller (1), the output terminal of driving circuit (2) is electrically connected at LED cell board (3), on the base plate of described LED cell board (3), be evenly provided with LED device, the base plate of described LED cell board (3) adopts multilayer PCB circuit board, the base plate of described LED cell board is respectively equipped with heat dissipating layer, described controller comprises communication module, control module, FLASH memory module, described control module, communication module and FLASH memory module are sequentially electrically connected, described driving circuit (2) comprises DC output circuit and the LED illuminating circuit being comprised of input protection circuit and rectification circuit, also comprise metal-oxide-semiconductor turning circuit and mu balanced circuit, described metal-oxide-semiconductor turning circuit comprises high-voltage MOS pipe, the source electrode of described metal-oxide-semiconductor is connected with the negative pole of described DC output circuit and ground connection, and the drain and gate of described metal-oxide-semiconductor is all connected with the positive pole of described DC output circuit, described mu balanced circuit comprises adjustable voltage reference source, the positive pole of described adjustable voltage reference source is connected with the drain electrode of described metal-oxide-semiconductor, the negative pole of described adjustable voltage reference source is output terminal, be connected with described LED illuminating circuit, on the output terminal of described adjustable voltage reference source, be connected with feedback resistance, the reference edge of described adjustable voltage reference source is in parallel with described feedback resistance, between the grid of described metal-oxide-semiconductor and the positive pole of described DC output circuit, be connected with voltage stabilizing diode, the positive pole of described voltage stabilizing diode is connected with the grid of described metal-oxide-semiconductor, and the negative pole of described voltage stabilizing diode is connected with the positive pole of the positive pole of described DC output circuit, described adjustable voltage reference source, described feedback resistance is comprised of the 5th resistance and the 6th resistance, described the 5th resistance and described the 6th resistance are in parallel, one end of described the 5th resistance and described the 6th resistance is all connected with the output terminal of described adjustable voltage reference source, the other end of described the 5th resistance and described the 6th resistance is all connected with the grid of described metal-oxide-semiconductor, and is connected between the positive pole of described voltage stabilizing diode and the grid of described metal-oxide-semiconductor, described metal-oxide-semiconductor turning circuit comprises the heat sink resistance being connected between the positive pole of described DC output circuit and the grid of described metal-oxide-semiconductor, drain electrode, described heat sink resistance is comprised of the first resistance, the second resistance, the 3rd resistance, the 4th resistance, described the first resistance and described the second resistance are in parallel, described the 3rd resistance and described the 4th resistance are in parallel, and the parallel circuit that described the first resistance and described the second resistance form is connected with the parallel circuit that described the 3rd resistance and described the 4th resistance form, between the source electrode of described metal-oxide-semiconductor and ground, be connected with protective resistance, described metal-oxide-semiconductor is N channel enhancement metal-oxide-semiconductor, and described adjustable voltage reference source is three end adjustable shunt reference sources.
2. a kind of controlled in wireless full-color LED display screen according to claim 1, is characterized in that: described communication module (11) is GPRS module or gsm module or WIFI module; Described heat dissipating layer is aluminium base or copper base or iron substrate or aluminium alloy base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310303902.8A CN103531144A (en) | 2013-07-18 | 2013-07-18 | Wireless control full color LED display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310303902.8A CN103531144A (en) | 2013-07-18 | 2013-07-18 | Wireless control full color LED display screen |
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| CN201310303902.8A Pending CN103531144A (en) | 2013-07-18 | 2013-07-18 | Wireless control full color LED display screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104918364A (en) * | 2015-05-15 | 2015-09-16 | 上海庆科信息技术有限公司 | Wi-Fi-based wireless intelligent LED power source |
| CN111681600A (en) * | 2020-01-09 | 2020-09-18 | 友达光电股份有限公司 | Display device |
| CN112652264A (en) * | 2019-10-12 | 2021-04-13 | 西安诺瓦星云科技股份有限公司 | LED module and display box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104918364A (en) * | 2015-05-15 | 2015-09-16 | 上海庆科信息技术有限公司 | Wi-Fi-based wireless intelligent LED power source |
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Application publication date: 20140122 |