CN106782291A - A kind of LED display system - Google Patents
A kind of LED display system Download PDFInfo
- Publication number
- CN106782291A CN106782291A CN201611037705.6A CN201611037705A CN106782291A CN 106782291 A CN106782291 A CN 106782291A CN 201611037705 A CN201611037705 A CN 201611037705A CN 106782291 A CN106782291 A CN 106782291A
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- Prior art keywords
- led display
- display
- control system
- led
- drive circuit
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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]
Abstract
The invention discloses a kind of LED display system, the LED display system includes the PC, control system and the LED display that link successively, the control system includes input interface, signal controller and output interface, and the LED display includes the dot matrix or pel array, drive circuit, control system and coffret and corresponding application software of light emitting diode composition；It is easily installed, using display unit plate or display unit box, the screen size into required with application places requirement Optional assembling can be required according to user, if expanding or shrinking system scale, new unit need only in systems be increased on demand, or certain unit is removed, how much system integrity will not be influenceed, and be easily installed and safeguarded.
Description
Technical field
The present invention relates to electronic information technical field, more particularly to a kind of LED display system.
Background technology
With the discovery of science and technology, in recent years, LED electronic displays increasingly cause the weight of people as a kind of high-tech product
Depending on.It can show or loop play word, figure and image information in real time, with display mode it is abundant, sight is strong, display
Content modification is convenient, brightness is high, display is stable and various advantages such as long lifespan, be widely used in commercial advertisement, sports tournament,
The numerous areas such as transport information report.
The core technology of LED display is concentrated mainly in controller.At present, most of asynchronous display screen uses 8
Position or the microcontroller of 16, due to the processing speed by microprocessor, architectural framework, addressing range, peripheral interface resource
Etc. many restrictions, it has been difficult to requiring to show that more pixel, display content frame frequency be higher, in the case of Dynamic Announce effect complexity
Obtain good dynamic visual impact.
Therefore need to provide a kind of LED display system to avoid drawbacks described above.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of LED display system, and have than before more
Excellent performance.
A kind of LED display system, the LED display system includes the PC, control system and the LED display that link successively,
The control system includes input interface, signal controller and output interface, and the LED display is constituted including light emitting diode
Dot matrix or pel array, drive circuit, control system and coffret and corresponding application software.
Preferably, the LED display drive circuit is used for receiving the data signal from control system, makes LED array
Light on request.
Preferably, the control system is responsible for receiving, change and processing various external signals, and with certain rule and side
Formula passed the signal to and shown on LED display.
Technical scheme has the advantages that：
A kind of LED display system that the present invention is provided, is designed in localized design using modularized circuit, and difference is divided into by function
Module, few contact is only needed between each module, greatly improve stability, the reliability of system.Debugging, maintenance
Difficulty is substantially reduced；Advanced Distributed Scans technology, the scanning of display portion uses scan control technology, display portion to be divided
Into different units, independently it is scanned.Signal between each unit synchronizes control using signal latch technology, display
Stability is greatly enhanced；It is visual good, the display screen constituted using high performance lED driving chip have high brightness, it is bright in luster,
Visual angle is big, long lifespan（No less than 50,000 hours）, stability is high, the features such as fast response time；It is easily installed, it is single using display
First plate or display unit box, can require the screen size into required with application places requirement Optional assembling according to user,
If expanding or shrinking system scale, new unit need only be in systems increased on demand, or remove certain unit, system is complete
How much property will not be influenceed, and be easily installed and safeguarded.
Specific embodiment
In order to have a clear understanding of technical scheme, its detailed structure will be set forth in the description that follows.Obviously, originally
Simultaneously deficiency is limited to specific details appreciated by those skilled in the art for the specific execution of inventive embodiments.Preferred reality of the invention
Apply example to be described in detail as follows, except these for describing in detail implement exception, there can also be other embodiment.
A kind of LED display system, the LED display system includes the PC, control system and the LED display that link successively,
The control system includes input interface, signal controller and output interface, and the LED display is constituted including light emitting diode
Dot matrix or pel array, drive circuit, control system and coffret and corresponding application software, the LED display
Drive circuit is used for receiving the data signal from control system, LED array is lighted on request, and the control system is responsible for connecing
Various external signals are received, changed and processed, and display on LED display is passed the signal to certain rule and mode.
Drive circuit：The Main Function of LED display drive circuit is to receive the data signal from control system, is made
LED array is lighted on request.
（1）From using device point have conventional type, tailored version and functional form：
Conventional type drive circuit is to use general integrated circuit, such as 74HC154,74HC595,74LS374 etc. to be filled as data
The main devices of load.This design, principle is simple, cheap, and is hardly limited by device source, is more wide at present
General application form.
Tailored version drive circuit, is domestic some strong LED display manufacturing firms, by advanced technology hand
Section, the LED display screen dedicated for being adapted to oneself product researched and developed drives IC.External many IC manufacturers are also tracking this
Individual market, releases some new driving IC one after another.The driving IC of these tailored versions, what is had is fairly simple, is only to improve original
Carry out the integrated level or driving force of universal driving IC;What is had is then more complicated, is developed according to the products characteristics of oneself
's.
Functional form drive integrated circult grows up on the basis of tailored version drives IC.It can not only make display
The function enhancing of screen, and the complexity of system design is also simplifies, the resistance to overturning of LED display is improve,
It is the development trend of LED display drive circuit.
（2）Divide from the principle that information of realizing refreshes, LED screen drive circuit is divided to two kinds of sweep type and latch-type：Sweep type
Refer to that the n rows such as the row of display screen 4,8 rows, 16 rows light emitting diode shares one group of row driving register, by the timesharing of row driving tube
Work so that often the lighting time of row LED accounts for the 1/n of total time, as long as the refresh rate of whole screen is more than 50HZ, using human eye
Visual persistence effect, so that it may form a width complete word or picture.This design circuit structure is fairly simple, uses component
Less, cost is relatively low, but due to being time-sharing work so that the lighting time per a line LED is reduced, and has dropped the brightness of LED
It is low.This type of drive is generally used for indoor LED display.
Latch-type driving refers to that each LED on display screen both corresponds to a drive circuit, different from sweep type, is driven
Dynamic register file works without the time-division, and the brightness dutycycle of each LED is close to 100%.Latch-type is driven such as the design using conventional type
Method, then component used is more, relatively costly, is such as designed using tailored version or functional form IC, then cost will be greatly lowered.
The general big multiplex latch-type of outdoor LED display screen drives.
Control system：Control system is responsible for receiving, change and processing various external signals, and with certain rule and mode
Pass the signal to and shown on LED display.Control system is a vital part in LED display, it
Performance and achieved function, also directly represent the performance level of display products.
（1）From the point of view of the mode for realizing control, system, control circuit can be divided into two kinds of centralization and distributing：Centralization control
System processed refers to that LED display is only commanded by a control system, and each display unit has common data-signal, outer synchronization
Signal and especially control time-base signal.Adopt in this way, it is necessary to treatment whole screen contain much information, during work clock frequency compared with
Height, control system is complicated, but is easily managed, and system reliability is high, low cost.
Distribution type control system refers to that each unit of display screen has the control system of oneself, and each display unit only has
Common data-signal and external synchronization signal, without common special control time-base signal, adopts in this way, it is only necessary to process
, all than relatively low, the design of control system is also very simple, control electricity for one information content of unit, its information content and working clock frequency
Cable data volume is few, and command range can be larger, while being substantially finished the debugging of whole screen in the production process of unit.Its structure
Form is mostly half movable type structure, but adopts in this way, component it is relatively costly.
（2）Can be divided into two kinds of simultaneous display and asynchronous display from the real-time of display：
Simultaneous display mode refers to the information on LED display energy simultaneous display computer CRT, can be by LED display as one
The external big display of individual computer.
Asynchronous display mode is usually used in by monolithic processor controlled display system.It is not high in the requirement of real-time of presentation of information
In the case of, single-chip microcomputer receives the signal from serial ports of computers by serial ports by certain communications protocol, by after treatment, with
Data are delivered to display screen and shown by certain rule.The function of this kind of display screen is relatively simple, be only applicable to simple word and
Figure shows.
（3）Can be divided into from the effect of display and show two classes without gray level display and multi-grey level：
All there was only bright and do not work two states, and the full frame brush lighted without every pixel that gray level display refers to LED display
The new time is equally long.
Multi-grey level show refer to brightness in LED display per pixel be it is controllable refer to every point if 16 grades of gray scales
Brightness from being secretly divided into 16 grades to bright.Obviously it is only applicable to show word or simple figure without gray level display screen, and it is many
The display screen of gray level just can show colourful picture.
Display type：LED large screen displays can be divided into two kinds of static state display and dynamic scanning displaying.
Static state display each pixel a set of drive circuit of needs, if display screen is N × M pixel, needs N × M
Set drive circuit;Dynamic scanning displaying then uses multiplexing technique, if P roads are multiplexed, then needs a set of driving per P pixel
Circuit, N × M pixel only needs N × M/P to cover drive circuit.For dynamic scanning displaying, P is bigger, and required drive circuit is got over
Few, cost is also lower, and lead also greatly reduces, and is more beneficial for the manufacture of high density display screen.In actually used LED large-size screen monitors
In curtain display, seldom using static drive.
The display of LED lattice display modules typically uses dynamic scan type of drive, and a line can only be at most lighted every time
LED.Processor shows point by the completion that cooperates to driver to each LED in each LED lattice display module
It is bright, extinguish control operation.
Data acquisition unit obtains display data and the data form needed for being converted into frame controller from display card.Frame is controlled
After device obtains digitized display signal from data acquisition unit, by after screening, pickup, it would be desirable to show on LED display
The Content Transformation for showing is the data form required for scanning board.That is, frame controller obtains the standard interface of computer
Control signal, enables users to by computer application software（LED pipe science and engineering has）The control and regulation to LED screen are completed, is made
Frame controller not only adapts to the LED screen of various different sizes, moreover it is possible to adjust the brightness of whole screen and the whole-screen brightness function of colors,
Make LED screen that there is outstanding energy-saving effect.When main control computer and LED screen are apart from each other, using the length on frame controller
Line transtation mission circuit and line receiving card long complete the data transfer between frame controller and scanning board.Row control device is with the side of serially concatenated
Formula is connected, so as to complete the distribution of data a direction on a display screen.Each line control unit can obtain it from its cascade bus
Required display data.Due to adding location information in cascade, so line control unit outside need not be set can determine automatically
Position.Therefore in the LED control system of complete series, line control unit just turns into a kind of general standarized component.Display unit module
It is made up of LED display control chips and its peripheral circuit.Display unit module is also that display is completed in serially concatenated mode
Data distribution of the data on another direction in LED screen.Under scanning board control, display unit module repeats the frequency of display
Rate be not less than on 120Hz, and controlled output pin export be one with non-linear visual correct with 256 grades of gray scales
With the gray value that dutycycle form is represented.
A kind of LED display system that the present invention is provided, is designed in localized design using modularized circuit, is divided into by function
Different modules, only needs to few contact between each module, greatly improve stability, the reliability of system.Debugging,
Maintenance difficulties are substantially reduced；Advanced Distributed Scans technology, the scanning of display portion uses scan control technology, display portion
It is divided into different units, is independently scanned.Signal between each unit synchronizes control using signal latch technology, shows
The stability shown is greatly enhanced；Visual good, the display screen constituted using high performance lED driving chip has high brightness, color
Bright-coloured, visual angle is big, long lifespan（No less than 50,000 hours）, stability is high, the features such as fast response time；It is easily installed, uses
Display unit plate or display unit box, can require the display screen into required with application places requirement Optional assembling according to user
Size, if to expand or shrink system scale, need only in systems increase new unit on demand, or remove certain unit, be
How much system integrality will not be influenceed, and be easily installed and safeguarded.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, to the greatest extent
Pipe has been described in detail with reference to above-described embodiment to the present invention, and those of ordinary skill in the art still can be to this hair
Bright specific embodiment is modified or equivalent, these without departing from spirit and scope of the invention any modification or
Equivalent, is applying within pending claims.
Claims (3)
1. a kind of LED display system, it is characterised in that PC that the LED display system includes linking successively, control system and
LED display, the control system includes input interface, signal controller and output interface, and the LED display includes luminous
Dot matrix or pel array, drive circuit, control system and coffret and corresponding application software that diode is constituted.
2. LED display system according to claim 1, it is characterised in that the LED display drive circuit is used for receiving
Data signal from control system, makes LED array light on request.
3. LED display system according to claim 1, it is characterised in that the control system is responsible for receiving, change and locating
Various external signals are managed, and display on LED display is passed the signal to certain rule and mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611037705.6A CN106782291A (en) | 2016-11-23 | 2016-11-23 | A kind of LED display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611037705.6A CN106782291A (en) | 2016-11-23 | 2016-11-23 | A kind of LED display system |
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| CN106782291A true CN106782291A (en) | 2017-05-31 |
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ID=58975434
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656042A (en) * | 2009-09-16 | 2010-02-24 | 北京巨数数字技术开发有限公司 | LED display system |
| CN102157132A (en) * | 2011-05-13 | 2011-08-17 | 冉红 | Panel-controlled display system |
| CN102222469A (en) * | 2011-06-24 | 2011-10-19 | 杨铿 | Dynamic imaging device of LED lampstandards and application of same in tunnel advertisements |
| CN102542986A (en) * | 2011-12-29 | 2012-07-04 | 深圳市奥拓电子股份有限公司 | Light-emitting diode (LED) display system and data transmission method thereof |
| CN202771774U (en) * | 2012-09-07 | 2013-03-06 | 淮海工学院 | Multifunctional lattice display screen |
-
2016
- 2016-11-23 CN CN201611037705.6A patent/CN106782291A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656042A (en) * | 2009-09-16 | 2010-02-24 | 北京巨数数字技术开发有限公司 | LED display system |
| CN102157132A (en) * | 2011-05-13 | 2011-08-17 | 冉红 | Panel-controlled display system |
| CN102222469A (en) * | 2011-06-24 | 2011-10-19 | 杨铿 | Dynamic imaging device of LED lampstandards and application of same in tunnel advertisements |
| CN102542986A (en) * | 2011-12-29 | 2012-07-04 | 深圳市奥拓电子股份有限公司 | Light-emitting diode (LED) display system and data transmission method thereof |
| CN202771774U (en) * | 2012-09-07 | 2013-03-06 | 淮海工学院 | Multifunctional lattice display screen |
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Application publication date: 20170531 |