CN104050929A - LED control device and LED display screen - Google Patents
LED control device and LED display screen Download PDFInfo
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- CN104050929A CN104050929A CN201410328510.1A CN201410328510A CN104050929A CN 104050929 A CN104050929 A CN 104050929A CN 201410328510 A CN201410328510 A CN 201410328510A CN 104050929 A CN104050929 A CN 104050929A
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Abstract
The embodiment of the invention discloses an LED control device. The LED control device is used for reducing the size of an LED lamp panel in an LED display screen to simplify lines of the LED lamp panel. The LED control device comprises a red light LED, a green light LED, a blue light LED and a driving chip, wherein the driving chip comprises a signal input port, a signal output port, driving ports, a plug-in resistor port, a power input port and a grounded port, the signal input port is used for receiving a control signal, the signal output port is used for outputting the control signal received by the signal input port, the number of the driving ports is not smaller than three, the driving ports are used for connecting the red light LED, the green light LED and the blue light LED and driving the red light LED, the green light LED and the blue light LED according to the control signal received by the signal input port, the plug-in resistor port is used for being connected with a plug-in resistor, the power input port is used for being connected with a power supply voltage, and the grounded port is used for being connected with the ground. The embodiment of the invention further provides the LED display screen.
Description
Technical field
The present invention relates to control field, relate in particular to a kind of LED control device and LED display.
Background technology
Along with scientific and technical development, it is very accurate that LED display can have been done.Wherein, include a large amount of LED in display screen, these LED distance each other often only has 0.5mm to 3mm, and the pin of every LEDs all needs to be connected with driving circuit, causes in display screen LED lamp plate circuit very complicated.In the time of the LED comprising at display screen a fairly large number of, even need the pcb board of 6 layers to 10 layers of layouts, be unfavorable for integrated and LED display lightening of circuit.
In order to simplify the PCB layout of LED lamp plate, there is a kind of LED drive unit in present stage, and the LED that has used 48 channels in this device drives chip, for driving the LED of 48 colors of the same race, to simplify LED lamp plate circuit.
But in general LED display, often a red-light LED, a green light LED and a blue-ray LED can be packaged in a 3IN 1LED particle.And the LED that LED display adopts drives chip only for driving the LED of same color, so need to connecting at least 3 LED, the pin of a 3IN 1LED particle drives chip, cause the cabling of each 3IN 1LED particle pin will cross over the distance that 3 LED drive chip, track lengths is longer, area occupied is larger, so when a plurality of 3IN1LED integrate, the volume of LED lamp plate is still larger, the pcb board number of plies of layout is still more, is unfavorable for integrated and LED display lightening of circuit.Simultaneously, on pin due to a 3IN 1LED particle, can be connected with at least 3 LED and drive chip, make the cabling of PCB lamp plate comparatively complicated, easily phase mutual interference between adjacent traces, the situation that even occurs signal transmission errors, has affected the image quality of LED display.
Summary of the invention
The embodiment of the present invention provides a kind of LED control device, comprising:
Red-light LED, green light LED and blue-ray LED;
Drive chip, described driving chip comprises:
Signal input port, for reception control signal;
Drive port, described driving port is no less than 3, for connecting described red-light LED, green light LED and blue-ray LED, and the control signal receiving according to described signal input port, drive described red-light LED, green light LED and blue-ray LED;
Plug-in resistance port, for connecting plug-in resistance;
Power input mouth, for connecting supply voltage;
Grounding ports, for ground connection.
The embodiment of the present invention also provides a kind of LED display, comprises above-mentioned LED control device.
In the LED control device that the embodiment of the present invention provides, a LED who drives chip can drive 3 kinds of different colours.Like this when encapsulation 3IN 1LED particle, the LED of 3 kinds of different colours that only a driving chip need to be driven is encapsulated, make the pin of every 3IN 1LED particle only need to drive chip to be connected with one, cabling on the pin of every like this 3IN 1LED particle does not just need to cross at least 3 distances that drive chip, track lengths and cabling complexity have been greatly reduced, and then reduced the volume of LED lamp plate, simplified LED lamp plate circuit, be conducive to the lightening of LED display, improved the image quality of LED display.
Accompanying drawing explanation
Fig. 1 is example structure figure of LED control device in the embodiment of the present invention;
Fig. 2 is example structure figure of LED control device application scenarios in the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of LED control device, for reducing the volume of LED lamp plate, simplifies LED lamp plate circuit, makes that LED display is more frivolous, image quality is higher.The embodiment of the present invention also provides relevant LED display, below will be described respectively.
The basic structure of the LED control device 100 that the embodiment of the present invention provides refers to Fig. 1, mainly comprises:
Red-light LED, green light LED and blue-ray LED.Wherein, the red-light LED in LED control device, green light LED and blue-ray LED need only more than one, and concrete number does not limit.Preferably, red-light LED in each LED control device, green light LED are identical with the number of blue-ray LED.Wherein, red-light LED represents with R, and green light LED represents with G, and blue-ray LED represents with B.
Drive chip, comprising:
Signal input port, for reception control signal.Wherein, signal input port can be from CPU reception control signal; And when a plurality of LED control device series connection, signal input port can, from other LED control device reception control signal, not limit in the present embodiment yet.
Drive port, for connecting this red-light LED, green light LED and blue-ray LED, and the control signal receiving according to signal input port, drive red-light LED, green light LED and blue-ray LED.Wherein, because red-light LED, green light LED and blue-ray LED all can not be less than one, so drive the number of port can not be less than 3.Understandable, the number of driving port should be no less than the summation of the number of this red-light LED, green light LED and blue-ray LED.
Plug-in resistance port, for connecting plug-in resistance.Wherein, plug-in resistance is for arranging the current value that drives port driver red-light LED, green light LED and blue-ray LED, in number the present embodiment of plug-in resistance, do not limit, preferably, the number of plug-in resistance can be 3, is respectively used to arrange the current value that drives the current value of port driver red-light LED, the current value that drives green light LED and driving blue-ray LED.
Power input mouth, for connecting supply voltage.
Grounding ports, for ground connection.
The present embodiment has proposed a kind of LED control device, for controlling the three-color LED of LED display.In this LED control device, include the LED and driving chip of three kinds of different colours, wherein, a LED who drives chip can drive 3 kinds of different colours.Like this when encapsulation 3IN 1LED particle, the LED of 3 kinds of different colours that only a driving chip need to be driven is encapsulated, make the pin of every 3IN 1LED particle only need to drive chip to be connected with one, cabling on the pin of every like this 3IN 1LED particle does not just need to cross at least 3 distances that drive chip, track lengths and cabling complexity have been greatly reduced, and then reduced the volume of LED lamp plate, simplified LED lamp plate circuit, be conducive to the lightening of LED display, improved the image quality of LED display.
Preferably, the LED lamp that a plurality of driving ports of driving chip connect can be according to (red, green, blue), (red, indigo plant, green), (green, red, indigo plant), (green, indigo plant, red), (indigo plant, green, red), (indigo plant, red, green) mode or other modes arrange, in the present embodiment, do not limit.Like this, drive three pins of arbitrary neighborhood in chip, to be connected with a red-light LED, a green light LED and a blue-ray LED, make when a red-light LED, a green light LED and a blue-ray LED are packaged into a 3IN1LED particle, as long as will drive three LED that drive port to connect adjacent on chip to be encapsulated.Like this, the cabling on the pin of each 3IN 1LED particle can be worth the distance of crossing over 3 adjacent driven ports, and track lengths can further shorten.The LED lamp that the driving port of driving chip connects also can be arranged according to other modes, in the embodiment of the present invention, does not limit.
Preferably, drive chip can also comprise signal output port, for the control signal output that signal input port is received, to realize the series connection that drives chip, and then realize the series connection of LED control device.Its concrete series system is: LED control device at least comprises that the first order drives chip and the second level to drive chip, and the first order drives the signal output port of chip to drive the signal input port of chip to be connected with the second level.When driving chip, the first order receives after the control signal of CPU transmission, not only can drive the LED connecting according to this control signal, this signal can also be outputed to the signal input port that the second level drives chip from signal output port, so just can realize the series connection of LED control device.Make in the time of a plurality of LED drive unit series connection, the control signal that CPU sends the only first order of the LED control device of input series connection drives chip, this first order drives chip this control signal can be flowed to the second level and drives chip, like this transmission of control signal one-level one-level is gone down.By such mode, make the control signal of CPU not need the driving chip through every one-level, can reduce wiring distance, can guarantee the independence of control signal transmission channel simultaneously, make the transmission of control signal can not be subject to the interference of other circuit, improved the accuracy of control signal transmission.
Understandable, although in inventive embodiments, drive the driving port of chip to be used for driving ruddiness, blue light and green glow three-color LED, but in fact, drive the driving port of chip can realize the function that only drives a kind of LED of color or only drive the LED of two kinds of colors, the embodiment of the present invention does not limit this yet.Preferably, from the angle of encapsulation technology and manufacturing cost, consider, drive chip to comprise that 48 driving ports are good.Further, when driving chip to comprise that 48 while driving port, these drive can have 16 for connecting red-light LED, 16 for connecting blue-ray LED, 16 for connecting green light LED in ports.
For the ease of understanding above-described embodiment, the concrete application scenarios of above-described embodiment of take is below described as example:
A LED display adopts a plurality of LED control device to drive 3IN 1LED particle, and the concrete connecting circuit of the plurality of LED control device is as shown in Fig. 2 200.Wherein, each LED control device all has same or analogous structure with the LED control device shown in Fig. 1.These LED control device are by driving chip mutually to connect, wherein, from CPU reception control signal for one-level drives chip, this one-level driving chip by signal input port from CPU reception control signal.
This one-level drives chip to have 48 to drive port, is respectively used to drive red, green, blue, red, green, blue ... the LED of red, green, blue color of light.This one-level drives chip according to the control signal receiving, by these 48 LED that drive port driver different colours.This LED display is encapsulated as a 3IN 1LED by the red, green, blue LED of every 3 adjacent driving ports, and the lamp plate circuit of this LED display is simplified.
Wherein, this one-level drives chip to comprise three plug-in resistance, the plug-in resistance that the plug-in resistance that is designated R drives the current value of port driver red-light LED for arranging, be designated G for arranging, drive port driver green light LED current value, be designated B plug-in resistance for the current value that drives port driver blue-ray LED is set.
The control signal that this one-level drives chip signal input port can also be received outputs to signal output port, and this one-level drives the signal output port of chip to be connected with the signal input port that another drives chip, this another driving chip is called secondary drive chip, and secondary drive chip can receive by the signal input port of self control signal that one-level drives the signal output port transmission of chip.Understandable, the signal output port of secondary drive chip also can be connected with three grades of signal input ports that drive chip, by that analogy, realizes the plural serial stage that drives chip.Wherein, the signal output port that every one-level drives chip is all connected with the signal input port of the driving chip of next stage, so just formed a control signal transmission channel, the control signal that CPU sends can arrive every one-level chip by this transmission channel, make the transmission of control signal can not be subject to the interference of other circuit, improved the accuracy of control signal transmission.
The embodiment of the present invention also provides a kind of LED display, comprises the LED control device shown in Fig. 1.
Those skilled in the art can be well understood to, for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.
If the form of SFU software functional unit of usining described integrated unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the all or part of of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), the various media that can be program code stored such as random access memory (RAM, Random Access Memory), disk or CD.
The above, above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a LED control device, is characterized in that, comprising:
Red-light LED, green light LED and blue-ray LED;
Drive chip, described driving chip comprises:
Signal input port, for reception control signal;
Drive port, described driving port is no less than 3, for connecting described red-light LED, green light LED and blue-ray LED, and the control signal receiving according to described signal input port, drive described red-light LED, green light LED and blue-ray LED;
Plug-in resistance port, for connecting plug-in resistance;
Power input mouth, for connecting supply voltage;
Grounding ports, for ground connection.
2. LED control device according to claim 1, is characterized in that, 3 adjacent described driving ports are connected with a red-light LED, a green light LED and a blue-ray LED.
3. LED control device according to claim 1, is characterized in that, described driving chip also comprises signal output port, for the control signal output that described signal input port is received.
4. LED control device according to claim 3, is characterized in that, described LED control device comprises that the first order drives chip and the second level to drive chip, and described first drives the signal output port of chip to be connected with the signal input port of the second driving chip.
5. according to the LED control device described in any one in claim 1 to 4, it is characterized in that, the number of described plug-in resistance is no less than three, and described plug-in resistance is for arranging the current value of red-light LED described in described driving port driver, green light LED and blue-ray LED.
6. according to the LED control device described in any one in claim 1 to 4, it is characterized in that, described driving chip comprises 48 described driving ports.
7. LED control device according to claim 6, it is characterized in that: 48 of described driving chip drive in ports, for connect red-light LED driving port, for connect green light LED driving port, with for being connected the driving port of blue-ray LED, be 16.
8. a LED display, is characterized in that, comprises the LED control device described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410328510.1A CN104050929A (en) | 2014-07-10 | 2014-07-10 | LED control device and LED display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410328510.1A CN104050929A (en) | 2014-07-10 | 2014-07-10 | LED control device and LED display screen |
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| CN104050929A true CN104050929A (en) | 2014-09-17 |
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| CN201410328510.1A Pending CN104050929A (en) | 2014-07-10 | 2014-07-10 | LED control device and LED display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109509426A (en) * | 2019-01-07 | 2019-03-22 | 山西高科华瑞电子科技有限公司 | The LED display of more mouthfuls of output receives card |
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Application publication date: 20140917 |