LED点阵显示-外文文献及翻译

1、译文：LED大屏幕显示系统的研究随着计算机技术的高速发展，LED制和工业调动系统,便于把各种参数、报警点、工艺流程显示得更加清晰完美， LED（主要是单片机和驱动电路控制运LEDLEDLEDLED。而蓝色和纯绿色LEDLED 显示屏的分类LEDLEDLED域，已经遍及交通、证券、电信、广告、宣传等各个方面。LED 显示屏的发展趋势LEDLED降低，使LEDLEDLEDLEDLED系的形成,IS09000LEDLEDLEDLED涉及思路及工作原理PC8LED.LED 点阵的驱动、译码、锁存等由控制板的数字电路负责.其数据由单片机从存储器中读取，同时单片机采用中断方式 ,通过RS-232PCPCP

2、C录入和排版，生成点阵数据或者命令字，实现人机交互功能.工作原理LEDLEDAT89C526225674HC37782083A8*8LEDPC向左拉幕,向右拉幕，向上拉幕,向下拉幕，向右移，从左向右、依次点亮,从中1001100/绿/黄/绿色，背景/黄/红/绿色。另外，还增加了几十种霓虹灯效果动画。PC 机上的显示控制软件可以实现汉字录入、字体选择、字号更改等功能，并且在进行数据处理后，可以在左侧模拟演示整体效果,同时“所见坐标追踪、时间日期等附加功能.PCRS-232发光二级管特性发光二极管(light emitting diode，LED，是一种把电能变成光能的特种PNPNN，NPPNLE

3、DLED 器件的驱动从 LED 器件的发光机理可以知道，当向LED 器件施加正向电压时，流过器件LEDPN为了控制它的发光强度,还要解决正向电流的调节问题.具体的驱动方式有直流LED.LEDVCC, 串联电阻RLEDLED发光强度恒定的情况。例如公交车上使用的用来固定显示“XX 路”字样的显示屏.LEDLEDLED。LED之点燃，就是脉冲驱动方式。脉冲驱动主要有两个方面的应用:扫描驱动和占空比驱动.扫描驱动的主要目的是节约驱动器，简化电路。采用这种方式时应该注相当的发光强度，脉冲驱动电流的平均值就应该与直流驱动的电流值相同。LED以节省控制驱动电路.LED 显示屏将发光灯按行按列布置，驱动时也

4、按行按列驱动.在扫描驱动方式下可以按行扫描，按列控制；也可以按列扫描，按行控制。LEDLEDLED由所谓的列控制电路来负责.外文资料原文：The research of the large screen display systems Led developmentAlong withcomputertechnologys highspeeddevelopment,LED（LightEmitting Diode） the screen display system takes after the television，the broadcast, the newspaper， the maga

5、zine “the fifth big media” marches into the social life fast each aspect 。Its collection microelectronic technology, the computer technology, information processing and management technology in a body, may the information through the writing， the design， the animation and the video frequency four fo

6、rms demonstrates. With media and so on bank of television monitors， magnetism vane compares，the LED large screen display system has the design to be artistic, the color is sharp； The design, the color change are rich， are fast；The low power loss, the long life， the use cost low， work stably reliable

7、 and so on characteristics. It demonstrated the chart article angle of view is big, the apparent distance is far ， thus has widely applied in the largescale square，the commercial advertizing, the sports complexes, the information dissemination, the news issue, the securities trading; It also applies

8、 in the industrial control and the industry reassignment system， is advantageous each kind of parameter, the alarm point， the technical process demonstrates clearly perfect, may satisfy the different environment the need. TheLED display monitor is one kind of use computer and the complex digital sig

9、nal processing electron advertisements propaganda screen. Its screen body part by the microprocessor (is mainly monolithic integrated circuit) and the driving circuit control movement， demonstrated the image or the writing obtain by the computer editionsoftware editor 。 Because the LED display monit

10、or this kind of new generationinformation graphic display device has the demonstration design to be stable, the power loss is low ， life long and so on characteristics, moreover it synthesized each kind of information graphic display devices strong point ， and has overcome own insufficiencybecause s

11、pecially a display monitor may demonstrate that the different contentthedisplaymode isrichTherefore inthepublicareaithastheintense advertisements propaganda and the information transmission effect ， already in the solid demonstrated day by day occupies the dominant position. The LED displaymonitors

12、prospects for development are extremely broadat present toward the high luminance, a higher weather fastness, the higher luminous density， the higher illumination uniformitythe reliability, the panchromatic direction is Is composed of the different materials semiconductor can send out the different

13、color the LED crystal spot. At present what applies is broadest is red， the green， LED. But the blue color and the pure green LED development had already achievedthe practical stage。LED display monitors classificationLED display monitors classified LED display monitor is many kinds of technical synt

14、hesis application product, involves photoelectronics, the semiconductor device, the digit electronic circuit，the large scale integrated circuit, the monolithic integrated circuit and the microcomputer and so on each aspect, both has the hardware and to have software After the LED display monitor is

15、takes the broadcast, the television,the newspaper， the magazine another new communication media. At present theLED display monitor basis uses the place to be different，may divide into the outdoor screen and the indoor screen two kinds， its main difference is photo tubes illumination brightness is di

16、fferent. But acts according to the content which demonstrated different also to be possible to divide into the image screen and the writing screen two kinds， the image screen may the display image as well as multimedia, but writing screen main demonstration writing or simple fixed image. Display ima

17、ges multimedia outdoor screens are the investment huge （reaches ashigh as several millions ） the large-scale upscale equipment ， main application inlargescale public place, image project and some important places 。 The LED display monitors application involves to social economy many domains， already

18、 spread the transportation， the negotiable securities, the telecommunication, the advertisement， the propaganda and so on each aspect.LED display monitors trend of developmentAt present the LED display monitors demonstration to the high luminance ， higher weather fastness, the higher illumination un

19、iformity ， a higher reliability, the panchromatic, the multimedia directions develops, systems movement ， the operation and the maintenance also to the integration ， the network, theintellectualized direction develop The 21st centurys display technology will be the panel display time, the LED displa

20、y monitor takes one of panel display leadership products to have a bigger development.1 。 since the high luminance ， entire color blue color and the green superelevation brightness LED product has appeared, the cost reduces fast year by year, causes the LED entire colored display monitor product cos

21、t to drop， the promoted speed speeds up. At the same time, along with control technologys development and the LED display monitor body stable enhancement, the entire colored LED display monitors brightness, the color, white balanced achieves the quite ideal effect, definitely may satisfy the outdoor

22、s allweather environmental condition request， moreover the image is clearer， is more exquisiteis sharper 2。afterstandardizationstandardizedmaterialtechnologymatureandmarket price basic balanced, the LED display monitors standardization and the standardization will become a tendency which the LED dis

23、play monitor developsrecent years industry in development， after several price recedes the adjustment achieves basically balanced， the product qualitythe system reliable and so on become the main competition factor ， this had the high request to the LEDdisplaymonitors standardization and the standar

24、dization. Profession standard and standard systems formation， IS09000 series standard application， causes the LED display monitor profession the development tends the order.3 。 the product mix diversification along with the informationization societys formationthe information field is even more wide

25、spread, the LED display monitors application prospect is broaderIt is estimated that large-scale or the ultra-large display monitor will have the change for the mainstream products aspect, will suitcan have in the service industry characteristic and the specialized request small LED display monitor

26、enhances greatly， will be richer face the information service domains LED display monitor product class and the variety system, the part potential market demand and the application domain will have the breakthrough, like the mass transit, the parking lot， the dining, the hospital and so on comprehen

27、sion service aspects information display monitor demand will have a bigger enhancement.Involves the mentality and the principle of workThis system basis classics circuit design mentality, uses the design method from bottom to top， from the display panel to the actuation board， arrives at the control

28、 panel again， carries on the hardware programming, after debugging successfully, receives a telegram the source plate ， finally completes the data transmission board andPC machineconnects，carries onthe PCsoftware programming，completes the demonstration data the production, the extraction， processing

29、， the transmission as well as the demonstration effect real time control. Each module uses 8 LED lattices to lighten each line by the line scan form red， green， the traffic light, the demonstration writing and the image. The LED lattices actuation， the decoding,the lock save and so on to be responsi

30、ble by control panels digital circuit 。Its data reads by the monolithic integrated circuit from the memory，simultaneously the monolithic integrated circuit uses the interrupt mode， carries on the two-way communication through the RS232 data line and PC machine， from the PC machine gain order or the

31、data, and carries out the movement or the stored datum according to the order。Not only but PC machine carries on many machine serial port correspondences with many monolithic integrated circuits ， but must be responsible for the writing input and the typesetting, the production lattice data or the o

32、rder character， realize the man-machine interaction function。Principle of work this article designs the largescale LED display monitorbecomes by the double primary color lattice LED combination, uses the line-by-line scanning the display mode to demonstrate red, green, the yellow three kind of color

33、 random lattice information 。 The display module uses the lineby-line scanning demonstration the way, its control system take monolithic integrated circuit AT89C52 as a core， uses 62256 memories to take the datacarrier storage， actuates 8*8 using latch 74HC377 and 8 group of line driver 2083The LED

34、display module, simultaneously opens the serial port interrupt and superior PC machine carries on many machine correspondences 。 Through realizes display monitors many kinds of animation pattern to the monolithic integrated circuit programming to demonstrate: Rolls the screen toward left, rolls the

35、screen toward rightrolls the screen upwardly， rolls the screen downward， on rolls the screen toward left, on rolls the screentowardright，to the Zola curtain，pulls the curtain toward right，pulls the curtain upwardly, pulls the curtain downward ， to the right lateral, lightens in turn from left to rig

36、ht ， from among to two nearby, lightens in turn. Animation speed adjustable： Divides into 100 grades, lowest is 1 fast，highest is 100 fast. The pattern color is diverse: The background achromatic color ， the writing red/green/yellow, the background is red, the writing does not have/the yellow/green,

37、 the background green, the writing does not have/yellow/red，the background yellow, the writing does not have/the red/green. Moreover，but also increased several dozens kind of neon light effect animation. The PC machine on display control software may realize functions and so on Chinesecharacter inpu

38、t, typeface choice, words change, and after carrying on the data processing ， mayinleftsidesimulatethedemonstrationwholeeffect ， simultaneously“seesnamely obtained” demonstration in underneath preview regionMoreover， this control software also has additional functions and so on text designation， mou

39、se localization， coordinate tracing， time date 。 PC machine realizes through the RS-232 connection with the demonstration part monolithic integratedcircuits correspondence ， interruptstherealtimereceiveandthe transmission data message using the monolithic integrated circuit serial port 。 Has also gi

40、ven dual attention to monolithic integrated circuits antigambling ability in the systemdesign, enhanced thesystems operation reliabilityeffectively。Shines the second-level tube characteristicThe light emitter diode （light emitting diode， LED）, is one kind turns the electrical energy the energy of li

41、ght the special component, when the electric current achieves the threshold current， the light emitter diode breakover, along with electric current passing, produces the visible light. Light emitter diodes structure mainly ties the chip， the electrode and the optical system constitutionby PN。 After

42、PN ties performs the direct voltage, P areas hole injection to the N area ， N areas electron-injection to the P area，the electron which and the hole meet, pours into after mutually namely produces compound, these minority carriers injection which ties in PN produce the radiation with compound to shi

43、ne 。 It is the original radiation illumination, does not need the high injection current to have the granule number reverse distribution, also does not need the optical resonator, the launch right andwrong coherent light 。 Describes the LED characteristic to have many parameters, between these param

44、eters relations present misalignment 。 Therefore， describes these relations with the characteristic curve， has the use value in the project application.LED components actuationMay know from the LED components illumination mechanism, when exerts the direct voltage to the LED componentwinds through co

45、mponents forward current to cause its illumination。Therefore the LED actuation is must make its PN knot to be in the forward bias， simultaneously to control its luminous intensity, but must solveforward current adjustment problem 。 The concrete drive type has 9 and so on directcurrent actuation， con

46、stant flow actuation， pulse actuation and scanning actuationin this system LED components actuation for scanning actuation。1. direct-current actuation. The directcurrent actuation is the simple the actuation method 。 The LED operating point by supply voltage VCC， series resistance R and a LED compon

47、ents voltage -current characteristic decided together. This drive type suits in the LED component are few, luminous intensity constant situation 。 For example on the public transportation uses for to demonstrate theroad fixedly” the inscription display monitor。2constant flow actuationIs steep as a r

48、esult of the LED components characteristic， in addition components dispersivity, causes in same the supply voltage and in the same limiting resistors situation , the various components forward current is not same, thus causes the luminous intensity difference 。 If carries on the constant flow actuation to the LED component, so long as the constant flow value is the same, the luminous intensity is quite close. Transistors input level h