CN202102691U - Embedded LED display screen full-color synchronization playing apparatus - Google Patents
Embedded LED display screen full-color synchronization playing apparatus Download PDFInfo
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- CN202102691U CN202102691U CN2011201981779U CN201120198177U CN202102691U CN 202102691 U CN202102691 U CN 202102691U CN 2011201981779 U CN2011201981779 U CN 2011201981779U CN 201120198177 U CN201120198177 U CN 201120198177U CN 202102691 U CN202102691 U CN 202102691U
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Abstract
The utility model relates to an embedded LED display screen full-color synchronization playing apparatus, including an ARM embedded chip circuit, an FPGA chip circuit, a full-color LED display screen port and a driving circuit, wherein the output end of the FPGA chip circuit is connected with a bus port of an LED display screen, an upper computer control system is connected with an interface circuit of the ARM chip and the FPGA chip via a bus, the interface circuit of the ARM chip and the FPGA chip comprises an Ethernet and an RS 232 or RS 485 circuit, and the full color LED display screen port and the driving circuit are connected with the LED display screen. The apparatus also includes a 200-pin physical connector used for specially connecting the ARM embedded chip circuit and arranged on a main control board of an embedded full color LED display screen control apparatus. The LED display screen ARM system enables the price of a full color and double primary color LED display screen to be lower, the performance to be more stable, the power consumption to be lower, the color to be more life-like and plentiful, the electric components to be fewer and the failure rate to be lower.
Description
One, technical field
The utility model relates to the full-color simultaneously playing device of a kind of control system, especially LED that is applied to LED display control system field.
Two, background technology
LED display refers to the LED device is arranged in the mode of matrix, and the pattern with displayed image information shows with dot pattern.The screen body mainly is made up of luminotron, row and column driving circuit; Especially full color mode is effective; LED display synchronous playing control system is removed the ranks driving circuit of driving LED display screen according to certain sequential; With the on and off of control LED luminotron, utilize the visual persistence effect of human eye, form the graphic picture of continous-stable.The LED display screen control system is the core that LED shows.The characteristic of light-emitting diode display spare is greatly improved, and therefore its control system is had higher requirement.
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 possibly considered numerous factors.Like processor: processor module is irreversible; Because, only if abandon most performance history of being accomplished, and design again, failing processor can't change to a certain extent.In the exploitation journey, all hardware that touch chip will change, and the software of major part 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, FPGA, and other interfacing equipment and the outside hardware of processor.EBI: system bus, circuit board bus, and I/O bus etc. has all defined the scope of application of product.
From 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 through 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.Synchronous control system can adopt SDRAM and pci interface, and transmission can be adopted the RS422 standard, so cable is more, or adopts ethernet physical layer.The composition of asynchronous control system is as shown in Figure 2, and Fig. 2 is common asynchronous control system synoptic diagram.
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 to 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 is as shown in Figure 3.
This pattern has obtained client's approval, and especially on the display applications of highway, still the system complex of this pattern, cost height 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.
The control principle of 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 the ARM-LINUX basis of open source code, develop, application software comprises following main modular: (like Fig. 6)
(a) network communication and daemon thread: daemon thread is responsible for keeping watch on the diverse network that possibly exist and 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 provide 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 possibly be the program of a multithreading, and each forms all has oneself independently display process thread when many forms, accomplishes 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 ability display, promptly do not export, need to rewrite the driver of LCD when screen content has when renewal; 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 the utility model is the full-color simultaneously playing device of a kind of embedded LED display screen to be provided, to make the several modules in the LED display system accomplish physical connection and information transmission through agreement.The utility model also is to provide a kind of system architecture to make the several separate module in the system accomplish physical connection and information transmission through agreement.The characteristics of this interface are: the module of forming system is more independent, is convenient to independent modification, upgrading, replacement and expansion.
The purpose of the utility model is achieved in that the full-color simultaneously playing device of embedded LED display screen; It is characterized in that forming by ARM embedded chip circuit, fpga chip circuit, full-color LED display screen port and driving circuit; The output terminal of fpga chip circuit connects the bus port of LED display; By the interface circuit of host computer control system through bus connection ARM chip and fpga chip, the interface circuit of ARM chip and fpga chip is Ethernet interface, RS232 or RS485 circuit; Full-color LED display screen port and driving circuit connect LED display.
The output terminal of fpga chip circuit connect 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 used to accomplish 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.
The 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 said embedded all-colour LED display control unit, be used for different types of ARM chip system (being used to accomplish communication, data processing, data transmission and data management work) and insert; Electric power system is used to accomplish the conversion and the supply of system power supply.
The utility model beneficial effect is, a kind of embedded all-colour LED display control unit is provided, that independently 200 pin physical connector interfaces are formed the module of system is more independent, is convenient to device and revises separately, upgrades, replaces 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 possibly considered numerous factors.Such as: processor: processor module is irreversible; Because, only if abandon most performance history of being accomplished, and design again, 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, FPGA, and other interfacing equipment and the outside hardware of processor.EBI: system bus, circuit board bus, and I/O bus etc. has all defined the scope of application of product.Their determine what can, 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 expand system.The utility model LED display ARM master control system; Adopted current up-to-date ARM and FPGA control technology, make that full color and dual base color LED display price are 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 to go up at a PCB motherboard (mainboard) to accomplish whole systemic-functions.Be equipped with on the PCB motherboard: 1, the FPGA system be used to accomplish 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 accomplish communication, data processing, data transmission and data management work) access; 3, electric power system is used to accomplish 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 (like 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 accomplish 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 TFT interface of standard is adopted in the communication of ARM embedded chip and FPGA; In order to reduce taking to system bus; Adopt the interface of artificial intelligence ability display, promptly do not export, need to rewrite the driver of LCD when screen content has when renewal; 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.
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--RJ45 connector, 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.
The storehouse is supported in decoding: MPEG4, MPEG2 are provided, 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.
The system architecture of the utility model is on a PCB motherboard, to accomplish whole systemic-functions.Be equipped with on the PCB motherboard: 1, the FPGA system be used to accomplish 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 accomplish communication, data processing, data transmission and data management work) access; 3 electric power systems are used to accomplish 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 and FPGA system and the peripheral interface; 5, interface circuit has Ethernet interface/RS232/RS485 to be used to accomplish data communication and control, and the LED display interface is connected with the screen of going up that driving is used for video data; The utility model LED display ARM master control system; Adopted current up-to-date ARM and FPGA control theory and technology, make that full color and dual base color LED display price are lower, performance is more stable, power consumption is lower, the unit area resolution is higher, color more true to nature abundant, when forming system electronic package still less, make failure rate reduce.
Claims (1)
1. the full-color simultaneously playing device of embedded LED display screen; It is characterized in that forming by ARM embedded chip circuit, fpga chip circuit, full-color LED display screen port and driving circuit; The output terminal of fpga chip circuit connects the bus port of LED display; By the interface circuit of host computer control system through bus connection ARM chip and fpga chip, the interface circuit of ARM chip and fpga chip is Ethernet, RS232 or RS485 circuit; Full-color LED display screen port and driving circuit connect LED display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201981779U CN202102691U (en) | 2011-06-13 | 2011-06-13 | Embedded LED display screen full-color synchronization playing apparatus |
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| CN2011201981779U CN202102691U (en) | 2011-06-13 | 2011-06-13 | Embedded LED display screen full-color synchronization playing apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500552A (en) * | 2013-09-26 | 2014-01-08 | 西安诺瓦电子科技有限公司 | Control card of LED (Light Emitting Diode) display screen |
| CN103680402A (en) * | 2013-09-11 | 2014-03-26 | 富顺光电科技股份有限公司 | An asynchronous full color LED display control system based on an LEON3 soft core CPU |
| CN104103241A (en) * | 2014-08-04 | 2014-10-15 | 上海斐讯数据通信技术有限公司 | LED (Light Emitting Diode) display screen control system based on ARM (Asynchronous Response Mode) processor |
| CN104219458A (en) * | 2013-06-03 | 2014-12-17 | 练成惠 | High-definition multimedia LED display screen control system |
| CN105185253A (en) * | 2015-08-15 | 2015-12-23 | 何蓓 | Security transaction full-color LED display screen |
| CN105869571A (en) * | 2016-06-14 | 2016-08-17 | 苏州微控智芯半导体科技有限公司 | LED (Light Emitting Diode) control system |
| CN106558286A (en) * | 2017-02-14 | 2017-04-05 | 江苏利鼎微系统有限公司 | A kind of full-color LED display screen digital driving chip |
| CN108536500A (en) * | 2018-01-10 | 2018-09-14 | 上海伟世通汽车电子系统有限公司 | Improve the method and its system of car-mounted terminal UI interface display frame per second |
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2011
- 2011-06-13 CN CN2011201981779U patent/CN202102691U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104219458A (en) * | 2013-06-03 | 2014-12-17 | 练成惠 | High-definition multimedia LED display screen control system |
| CN103680402A (en) * | 2013-09-11 | 2014-03-26 | 富顺光电科技股份有限公司 | An asynchronous full color LED display control system based on an LEON3 soft core CPU |
| CN103680402B (en) * | 2013-09-11 | 2015-12-23 | 富顺光电科技股份有限公司 | A kind of asynchronous all-colour LED display control program based on LEON3 soft nucleus CPU and control method thereof |
| CN103500552A (en) * | 2013-09-26 | 2014-01-08 | 西安诺瓦电子科技有限公司 | Control card of LED (Light Emitting Diode) display screen |
| CN104103241A (en) * | 2014-08-04 | 2014-10-15 | 上海斐讯数据通信技术有限公司 | LED (Light Emitting Diode) display screen control system based on ARM (Asynchronous Response Mode) processor |
| CN105185253A (en) * | 2015-08-15 | 2015-12-23 | 何蓓 | Security transaction full-color LED display screen |
| CN105869571A (en) * | 2016-06-14 | 2016-08-17 | 苏州微控智芯半导体科技有限公司 | LED (Light Emitting Diode) control system |
| CN106558286A (en) * | 2017-02-14 | 2017-04-05 | 江苏利鼎微系统有限公司 | A kind of full-color LED display screen digital driving chip |
| CN106558286B (en) * | 2017-02-14 | 2019-02-15 | 江苏利鼎微系统有限公司 | A kind of full-color LED display screen digital driving chip |
| CN108536500A (en) * | 2018-01-10 | 2018-09-14 | 上海伟世通汽车电子系统有限公司 | Improve the method and its system of car-mounted terminal UI interface display frame per second |
| CN108536500B (en) * | 2018-01-10 | 2021-06-11 | 上海伟世通汽车电子系统有限公司 | Method and system for improving display frame rate of UI (user interface) of vehicle-mounted terminal |
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Legal Events
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20150613 |
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| EXPY | Termination of patent right or utility model |