CN2831322Y - Embedded all-color LED displaying controller - Google Patents
Embedded all-color LED displaying controller Download PDFInfo
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- CN2831322Y CN2831322Y CNU2005200748593U CN200520074859U CN2831322Y CN 2831322 Y CN2831322 Y CN 2831322Y CN U2005200748593 U CNU2005200748593 U CN U2005200748593U CN 200520074859 U CN200520074859 U CN 200520074859U CN 2831322 Y CN2831322 Y CN 2831322Y
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Abstract
The utility model relates to an embedded type full-color LED display controlling device, which is connected with an epistasy computer control bus line. A main control board is composed of an ARM embedded chip circuit, an FPGA chip circuit and a port of a full-color LED display screen, wherein the output end of the FPGA chip circuit is connected with a bus line port of the LED display screen; the epistasy computer control bus line is connected with interface circuits of an ARM chip and an FPGA chip; each of the interface circuits is provided with an ethernet and is connected with an RS232 interface circuit or an RS485 interface circuit which are used for the transmission and the control of data among the chips and a peripheral circuit; the port of the LED display screen and a driving circuit are connected with the LED display screen. The utility model is additionally provided with a 200 needle physical connector which is especially connected with the ARM embedded chip circuit; the 200 needle physical connector is positioned on the main control board of the embedded type full-color LED display controlling device. An ARM main control system of the LED display screen of the utility model adopts the latest ARM and FPGA control technology at present; therefore, a full-color LED display screen and a double primary-color LED display screen have the advantages of low price, stable performance, low power consumption, vivid and rich colors, less electronic components and low failure rate.
Description
One, technical field
The utility model relates to a kind of control system that is applied to LED display control system field, especially a kind of structure that makes up relatively independent control device.
Two, background technology
LED display, the employing that mainly is meant of indication here be arranged in the mode of matrix with the LED device, with the pattern of displayed image information, the dot pattern of our indication just.The screen body mainly is made of luminotron, row and column driving circuit, mainly be divided into monochrome, secondary color (double-colored) and full color mode with the color representation difference of capability, the major function of LED display control system is exactly to remove the ranks driving circuit of driving LED display screen according to certain sequential, on and off with control LED luminotron, utilize the visual persistence effect of human eye, form the graphic picture of continous-stable.
The control core of LED display is the LED display control system.Along with the develop rapidly of LED luminescent device, the light characteristic of LED display is greatly improved, and also its control system is had higher requirement simultaneously.
1, LED display control system
On tradition, the LED display control system mainly is divided into synchronously and asynchronous two types.Its main differentiation standard mainly is from the relation between signal source, program source and the demonstration of screen body.If screen body and signal source are synchronized to then are referred to as the synchronous LED display screen control system, otherwise then are called the asynchronous LED display screen control system.The general signal source of synchronous control system is the video card picture information of computing machine or directly adopts video signal source, master control system adopts the hardware mapping mode that image content is shielded the body circuit by a series of processing rear drives such as collection, storage, format conversion, and it simply illustrates shown in Figure 1.Fig. 1 is the synchronous control system synoptic diagram.
The applicant's 2000 series, 2002 series in fact all belong to this pattern, and institute's difference is the pattern of processing power, transmission and the difference of storage organization.Wherein 2000 series have adopted SDRAM and pci interface, and the RS422 standard has still been adopted in transmission, so cable is more, 2002 series have then adopted ethernet physical layer.The composition of asynchronous control system as shown in Figure 2, Fig. 2 is common asynchronous control system synoptic diagram.Depew, the applicant Nanjing reaches scientific and technological industrial corporation " DBY-4.1 asynchronous system " and 1. adopts general and reliable FLASH storage, avoids the instability of battery storage.2. increase by 256 grades of brightness control functions, more can be fit to most workplace.3. dot matrix timing parameter design stability is reliable.4. multiple demonstration stunts such as horse race lamp have been increased.External is independent of outside the computing machine, has the parameters memorizing function, powers up the work of getting final product.Can external various video source.As: gamma camera, TV signal, dedicated video Play System, DVD player and other video source.Adjust display parameter by liquid crystal panel or serial ports, convenient clear.Adopt standard I U cabinet, easy to install.Per second transmits 60 frames, never frame losing.The standard asynchronous control system has adopted this pattern exactly.
From above synchronous, asynchronous realization block diagram, just can understand their relative merits separately.The bandwidth of synchronous control system is big, information processing capability by force, generally can both be realized high gray scale and high refresh rate, but cost is higher, system complex, take off not open signal source; Simple and convenient, the low price of asynchronous system, but effect a little less than, generally can't realize gray scale.
In recent years, the requirement at the user utilizes development of electronic technology, attempts the advantages with synchronous and asynchronous LED control system, has released two kinds of embedded Control series.Wherein a kind of based on the PC104 industrial computer, its structure as shown in Figure 3.
This pattern has obtained client's approval, and especially on the display applications of highway, still system complex, the cost height of this pattern have influenced it and promoted on a large scale.The applicant took up to study the LED display control system based on the ARM embedded system from 2003 in light of this situation.
2, the control principle of ARM embedded system
The full-color display system of ARM embedded system control of product whole LED is made up of host computer, embedded full-color control system, full-color LED display screen three parts, and the content that relates to the application's exploitation comprises: the software and hardware of the remote control service software of host computer and Promgramming software, embedded full-color control system.
(1) hardware system
The complete machine hardware circuit is made up of program source, demonstration control, display driver and power supply.
(2) software systems
On ARM-LINUX 2.6 bases of open source code, develop, the kernel of Linux2.6 has significantly improvement than the Linux2.4 kernel, strengthened real-time preemptive kernel, 2.6 the linux kernel of version has used the new scheduler algorithms by Ingo Molnar exploitation, be called O (1) algorithm, it carries out extremely remarkably under the situation of high capacity, and when a lot of processor, also can expand well, improve power management and supported ACPI (senior power configuration administration interface, Advanced Configuration and PowerInterface), being used to adjust CPU (can make CPU work in different clock frequencies with economize on electricity) and software under different loads hangs up.
We carry out performance to Linux2.6 core code and further optimize, and remove useless driving, add self-defining hardware drive program.Application software comprises following main modular: (as Fig. 6)
(a) network communication and daemon thread: daemon thread is responsible for monitoring that the diverse network that may exist is connected, in case find that host computer is visiting, create communication thread at once and set up the network connection, allow to set up a plurality of connections, different ports provides the service of difference in functionality, transmission, control, detection, or other special services.
(b) file system support: to NTFS, FAT, FAT32, EXT2, EXT3, wait partitioned organization to provide support, can reliable recognition, correctly read-write when guaranteeing to use the USB storage facilities.
(c) displaying contents handling procedure
This may be the program of a multithreading, and each forms all has oneself independently display process thread when many forms, finishes the information content according to listing and shows the realization of special effects.
(d) show output driver program: adopt the TFT interface of standard with the communication of FPGA, in order to reduce taking to system bus, adopt the interface of artificial intelligence energy display, promptly, do not export screen content when having when renewal, need to rewrite the driver of LCD, after showing a two field picture, close CLC, know that screen content is changed.Utilize the virtual window technology to realize the translation animation effect, realize multiple special effects with many display buffers district technology.
(e) storehouse is supported in decoding: be responsible for providing MPEG4, MPEG2, H.264 wait the soft decodings of picture such as video software decoding work, JPEG JPEG2000 GIF, also have the animation decoding of FLASH.Want to realize that smooth real-time video broadcast also will rely on multimedia instruction or the inner DSP of ARM.
Three, summary of the invention
The purpose of this utility model is a kind of embedded all-colour LED display control unit to be provided, to make the several separate module in the system finish physical connection and information transmission by agreement.And a kind of 200 pin physical connector interfaces are provided, it is more independent that this interface is formed the module of system, is convenient to independent modification, upgrading, replacement and expansion.
The purpose of this utility model is achieved in that embedded all-colour LED display control unit, connect by the host computer control bus, form master control borad by ARM embedded chip circuit, fpga chip circuit, full-color LED display screen port, the output terminal of fpga chip circuit connects the bus port of LED display, to the structural adjustment of last screen data, transmit, refresh, colour correction handles, host computer control system bus connects ARM chip and fpga chip circuit and peripheral interface circuit, is used for data transfer and control between chip and the peripheral circuit; Interface circuit is provided with Ethernet interface, RS232 or RS485 communicating circuit, is used to finish data communication and control, and the LED display port is connected with the screen of going up that driving circuit is used for video data.
Further improvement of the utility model is: be provided with 200 pin physical connectors, the special ARM embedded chip that connects, be placed on the mainboard of described embedded all-colour LED display control unit, be used for different types of ARM chip system (being used to finish communication, data processing, data transmission and data management work) and insert; Electric power system is used to finish the conversion and the supply of system power supply.
The utility model characteristics are, provide a kind of embedded all-colour LED display control unit, that independently 200 pin physical connector interfaces are formed the module of system is more independent, are convenient to device and revise separately, upgrade, replace and expand.In today of information age IT industry high speed development, the update of electronic product is maked rapid progress especially, therefore builds a function admirable, safe and reliable embedded hardware platform may need to consider numerous factors.Such as: processor: processor module is irreversible; Because, unless abandon most performance history of being finished, and redesign, failing processor can't change to a certain extent.
The utility model can adapt on stream, and all hardware that touch chip will change, and most software changes the processor disaster of can saying so midway too, is main key so select correct chip.This decision is to depend on the present product life cycle; Operating system: in case selected operating system, kernel, real-time program, or scheduling program (scheduler), the model of software is just fixing.Although hardware option can be depending on the selection of operating system, but still need wholely to abandon existing software architecture and lay equal stress on newly developedly, just might return starting point.Operating system is determining the selection of processor usually, and processor then can't change operating system; System logic: especially core logic chipset group, FPGA (Field Programmable Gate Array), FPGA, and the hardware of other interfacing equipment and processor outside.Bus interface: system bus, circuit board bus, and I/O bus etc. has all defined the scope of application of product.What they determine passable, and what can not be connected to the inside and outside of product.Selected correct bus, so when new chip, peripherals, or during the addition product listing, you just can be expanded system.The utility model LED display ARM master control system, adopted current up-to-date ARM and FPGA control technology, make full color and dual base color LED display price is lower, performance is more stable, power consumption is lower, the unit area resolution is higher, color abundant, electronic package more true to nature still less, failure rate reduces.
Four, description of drawings
Fig. 1 is the synchronous control system synoptic diagram
Fig. 2 is common asynchronous control system synoptic diagram
Fig. 3 is the asynchronous control system synoptic diagram based on the PC104 industrial computer
Fig. 4 is the total system block diagram of the embedded all-colour LED device of the utility model
Fig. 5 is the embedded full-color hardware control system figure of the utility model
Fig. 6 is the embedded full-color control system block diagram for software modules of the utility model
Fig. 7 is the embedded full-color hardware control system circuit block diagram of the utility model
Fig. 8 is the utility model ARM circuit system structural drawing
Fig. 9 is the utility model FPGA circuit system structural drawing
Five, embodiment
As shown in the figure, embedded all-colour LED display control unit is in Fig. 4 block diagram, and Fig. 5 is its hardware structure diagram.The system architecture of the utility model device is for to finish whole systemic-functions on a PCB motherboard (mainboard).Be equipped with on the PCB motherboard: 1, the FPGA system be used to finish the screen data structural adjustment, transmit, refresh, colour correction handles; 2,200 pin physical connectors are used for different types of ARM system (being used to finish communication, data processing, data transmission and data management work) access; 3, electric power system is used to finish the conversion and the supply of system power supply; 4, the control system bus is used for data transfer and the control between ARM system (adopting the 9E-5 type) and FPGA (as employing ACEX type FPGA device, but being not limited thereto) system and the peripheral interface; 5, interface circuit is provided with Ethernet interface/RS232/RS485 and is used to finish data communication and control, the LED display interface with drive the screen of going up that is used for video data and be connected; Fig. 8 is that the utility model ARM chip and peripheral circuit independently are connected with 200 pin physical connectors, assembles ARM embedded chip and peripheral circuit specially.Fig. 9 is the circuit system of the utility model field programmable logic device FPGA, comprises buffer circuit, colour correction, storer and the clock circuit etc. set up.
The utility model technical design index: standard and agreement; TCP/IP: meet the SIP standard; The MPEG-4 consensus standard.
The input of support digital video.Can play programs such as TV, video recording, shooting, VCD and animation.
RGB three looks can be adjusted the brightness and contrast separately, and have manual or automatic stepless continuously adjustable function, make color more pure, and reductibility is better.
Support Ethernet interface---RJ 45 connectors, meet IEEE 802.3 10 Base-T
With the 4096/16K level gray scale that algorithm is realized, used the colour switching space in the design, " pointwise dynamic color compensation technique " makes the color of LED display frame can keep the gorgeous of former image.
Claims (2)
1, embedded all-colour LED display control unit, connect by the host computer control bus, it is characterized in that forming master control borad by ARM embedded chip circuit, fpga chip circuit, full-color LED display screen port, the output terminal of fpga chip circuit connects the bus port of LED display, host computer control system bus connects the interface circuit of ARM chip and fpga chip, interface circuit is established Ethernet interface, RS232 or RS485 interface circuit, is used for data transfer and control between chip and the peripheral circuit; LED display port and driving circuit connect LED display.
2, by the described embedded all-colour LED display control unit of claim 1, it is characterized in that being provided with 200 pin physical connectors, connect ARM embedded chip circuit specially, be placed on the main chamber plate of described embedded all-colour LED display control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200748593U CN2831322Y (en) | 2005-08-25 | 2005-08-25 | Embedded all-color LED displaying controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200748593U CN2831322Y (en) | 2005-08-25 | 2005-08-25 | Embedded all-color LED displaying controller |
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| CN2831322Y true CN2831322Y (en) | 2006-10-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764981A (en) * | 2008-12-23 | 2010-06-30 | 康佳集团股份有限公司 | High-resolution video image controller for embedded LED display screen |
| CN101132287B (en) * | 2007-09-26 | 2011-07-13 | 中兴通讯股份有限公司 | Method and apparatus for implementing Ethernet link building and package receiving and sending indication |
| CN101459993B (en) * | 2007-12-14 | 2012-10-03 | 深圳迈瑞生物医疗电子股份有限公司 | Background lamp apparatus for control panel and control apparatus thereof |
| CN105515709A (en) * | 2015-12-07 | 2016-04-20 | 中国电子科技集团公司第三十二研究所 | Time synchronization device based on domestic FPGA and uclinux operating system |
| CN108519832A (en) * | 2018-03-29 | 2018-09-11 | 上海电机学院 | Touch screen control system based on ARM and FPGA and control method |
| CN109801590A (en) * | 2019-04-01 | 2019-05-24 | 上海灵信视觉技术股份有限公司 | For more receiving unit method of automatic configuration of LED display, apparatus and system |
-
2005
- 2005-08-25 CN CNU2005200748593U patent/CN2831322Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132287B (en) * | 2007-09-26 | 2011-07-13 | 中兴通讯股份有限公司 | Method and apparatus for implementing Ethernet link building and package receiving and sending indication |
| CN101459993B (en) * | 2007-12-14 | 2012-10-03 | 深圳迈瑞生物医疗电子股份有限公司 | Background lamp apparatus for control panel and control apparatus thereof |
| CN101764981A (en) * | 2008-12-23 | 2010-06-30 | 康佳集团股份有限公司 | High-resolution video image controller for embedded LED display screen |
| CN101764981B (en) * | 2008-12-23 | 2013-10-30 | 康佳集团股份有限公司 | High-resolution video image controller for embedded LED display screen |
| CN105515709A (en) * | 2015-12-07 | 2016-04-20 | 中国电子科技集团公司第三十二研究所 | Time synchronization device based on domestic FPGA and uclinux operating system |
| CN108519832A (en) * | 2018-03-29 | 2018-09-11 | 上海电机学院 | Touch screen control system based on ARM and FPGA and control method |
| CN109801590A (en) * | 2019-04-01 | 2019-05-24 | 上海灵信视觉技术股份有限公司 | For more receiving unit method of automatic configuration of LED display, apparatus and system |
| CN109801590B (en) * | 2019-04-01 | 2020-10-20 | 上海灵信视觉技术股份有限公司 | Multi-receiving-unit automatic configuration method, device and system for LED display screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061025 |