新疆风采18选7走势图

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山东LED显示屏恒流驱动电路的设计分析

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山东LED显示屏恒流驱动电路的设计分析

发布日期:2019-03-01 10:57 来源:http://gzrxqx.com 点击:

   LED显示屏新疆风采18选7走势图是80年代后期在全球迅速发展起来的新型信息显示媒体,它利用发光二极管构成的点阵模块或像素单元,组成大面积显示屏幕,以其可靠性高、使用寿命、环境适应能力强、性能价格比高、使用成本低等特点, 在信息显示领域已经得到了非常广泛的应用。

  LEDXIANSHIPINGZHUYAOBAOKUOFAGUANGERJIGUANGOUCHENGDEZHENLIE、QUDONGDIANLU、KONGZHIXITONGJICHUANSHUJIEKOUHEXIANGYINGDEYINGYONGRUANJIANDENG,QIZHONGQUDONGDIANLUSHEJIDEHAOHUAI, DUILED XIANSHIPINGDEXIANSHIXIAOGUO、ZHIZUOCHENGBENJIXITONGDEYUNXINGXINGNENGQIZHEHENZHONGYAODEZUOYONG。SUOYI,SHEJIYIZHONGJINENGMANZUKONGZHIQUDONGDEYAOQIU,TONGSHISHIYONGQIJIANSHAO、CHENGBENDIDEKONGZHIQUDONGDIANLUSHIHENYOUBIYAODE。BENWENJIUCHANGGUIXINGQUDONGDIANLUDESHEJIZUOXIEFENXIBINGTICHUHENGLIUQUDONGDIANLUDESHEJIFANGSHI。

1 、LED显示屏常规驱动电路的设计

 LED XIANSHIPINGQUDONGDIANLUDESHEJI,YUSUOYONGKONGZHIXITONGXIANGPEIHE,TONGCHANGFENWEIDONGTAISAOMIAOXINGQUDONGJIJINGTAISUOCUNXINGQUDONGERDALEI。YIXIAJIUDONGTAISAOMIAOXINGQUDONGDIANLUDESHEJIWEILIWEIJINXINGFENXI:

 DONGTAISAOMIAOXINGQUDONGFANGSHISHIZHIXIANSHIPINGSHANGDE4XING、8XING、16XINGDENGn XINGFAGUANGERJIGUANGONGYONGYIZULIEQUDONGJICUNQI, TONGGUOXINGQUDONGGUANDEFENSHIGONGZUO,SHIDEMEIXINGLEDDEDIANLIANGSHIJIANZHANZONGSHIJIANDE1/n ,ZHIYAOMEIXINGDESHUAXINSULVDAYU50Hz,LIYONGRENYANDESHIJUEZANLIUXIAOYING,RENMENJIUKEYIKANDAOYIFUWANZHENGDEWENZIHUOHUAMIAN。

新疆风采18选7走势图  CHANGGUIXINGQUDONGDIANLUDESHEJIYIBANSHIYONGCHUANRUBINGCHUDETONGYONGJICHENGDIANLUXINPIANRU74HC595HUOMC14094 DENGZUOWEILIESHUJUSUOCUN,YI8050 DENGXIAOGONGLVNPNSANJIGUANWEILIEQUDONG,ERYIDALINDUNSANJIGUANTIP127 DENGZUOWEIXINGSAOMIAOGUAN,

RUYIDANSEDIANZHEN、16 XING×64 LIEWEIYIGEJIBENDANYUAN,ZEXUYONG8 PIAN74HC595、64GE8050JI16GEXINGSAOMIAOGUAN, QIGONGZUOYUANLIWEI:JIANGBAPIAN74HC595JILIAN,GONGYONGYIGECHUANXINGSHIZHONGCLKJISHUJUSUOCUNXINHAOSTR。DANGDIYIXINGXUYAOXIANSHIDESHUJUJINGGUO8×8= 64 GECLKSHIZHONGHOUJIANGQUANBUYIRU74HC595ZHONG,CISHICHANSHENGYIGESHUJUSUOCUNXINHAOSTR,SHISHUJUSUOCUNZAI74HC595DEHOUJISUOCUNQIZHONG,ZEYUQIGESHUCHUWEIDUIYINGDE8050 JIANGCHUYUBAOHEDAOTONGHUOJIEZHI; TONGSHIYOUXINGSAOMIAOKONGZHIDIANLUCHANSHENGXINHAOSHIDIYIXINGSAOMIAOGUANDAOTONG,XIANGDANGYUDIYIXINGLEDDEZHENGDUANDOUJIEGAOPING,XIANRANDIYIXINGLEDGUANZIDELIANGMIEJIUQUJUEYU74HC595ZHONGSUOSUOCUNDEXINHAO;ZAIDIYIXINGLEDGUANZIDIANLIANGDETONGSHI,ZAI74HC595ZHONGYIRUDIERXINGYAOXIANSHIDESHUJU,SUIHOUJIANGQISUOCUN,BINGTONGSHIYOUXINGSAOMIAOKONGZHIDIANLUJIANGDIYIXINGSAOMIAOGUANGUANBIERJIETONGDIERXING,SHIDIERXINGLEDGUANZIDIANLIANG。YICILEITUI,DANGDISHILIUXINGSAOMIAOGUOHOUZAIHUIDAODIYIXING,ZHIYAOSAOMIAOSUDUZUGOUGAO,JIUKEXINGCHENGYIFUWANZHENGDEWENZIHUOTUXIANG,

  2、CHANGGUIXINGQUDONGDIANLUCUNZAIDEQUEXIAN

新疆风采18选7走势图  (1) DANGMOUYIXINGXINGQUDONGGUANYOUXIAOSHI,GAIXINGSUODUIYINGDESUOYOULEDFAGUANGERJIGUANDEDIANLIANGDIANLIUDOUJIANGLIUGUOGAIXINGQUDONGSAOMIAOGUAN,ERYIXINGZHONGDIANLIANGLEDGUANZIDEDUOSHAOSUISUOYAOXIANSHIDEWENZIHUOTUXINGERBUDUANGAIBIAN,SUOYIXINGSAOMIAOGUANZHONGLIUGUODEDIANLIUYOUJIAODADEBIANHUA,JIANGSHIQIGUANYAJIANGYOUSUOGAIBIAN;

  (2) DIANLIANGLEDGUANZIDEDUOSHAOERYINQIDIANLIUDEBIANHUAYEJIANGYINGXIANGDAODIANYUANDIANYAZHIDEBODONG,YOUCIJIANGYINGXIANGDAODIYIXINGLEDGUANZILIANGDUANDEDIANYA,SHIQISUIBUTONGDEXIANSHIWENZIHUOTUXINGBUDUANBODONG,YINGXIANGLEZHENGGEXIANSHIPINGLIANGDUDEJUNYUNXING。

  3 、LEDXIANSHIPINGHENGLIUQUDONGDIANLUDESHEJI

  TU3 JICHULEFAGUANGERJIGUANDEXIANGDUILIANGDUYUQIZHONGLIUGUODEDIANLIUZHIJIANDEGUANXI,CONGQUXIANZHONGKEYIKANCHU: ZAIYIDINGDEZHENGXIANGDIANLIUGONGZUOFANWEINEI,QIFAGUANGLIANGDUYUQIZHONGLIUGUODEDIANLIUJINSICHENGZHENGBI,SHUYUDIANLIUQUDONGXINGQIJIAN。SUOYIZHIYAONENGBAOZHENGMEIGELEDFAGUANGGUANZHONGLIUGUODEDIANLIUWEIYICHANGSHU,JIUNENGBAOZHENGQILIANGDUYIZHI。

  ERCONGCHANGGUIXINGQUDONGDIANLUDEGONGZUOYUANLIZHONGKEYIKANCHU,YOUYUQIXING、LIEQUDONGGUANDOUGONGZUOZAIBAOHEZHUANGTAI,WUFAKONGZHIQIDIANLIUDEDAXIAO,SUOYIWAIJIADIANYUANDIANYADEBODONG、XINGSAOMIAOQUDONGGUANGUANYAJIANGDEGAIBIANDENG,JIUZHIJIEYINGXIANGLED FAGUANGGUANZHONGLIUGUODEDIANLIU,YEJIGAIBIANLEQIXIANSHILIANGDU。RUGUOJIANGLIEQUDONGGUANYOUBAOHEZHUANGTAIGAIWEIXIANXINGFANGDAZHUANGTAI,BIANCHENGHENGLIUXINGQUDONG,JIUKEYIXIAOCHUYOUSHANGSHUYINSUZAOCHENGDEXIANSHIPINGLIANGDUBUJUNYUNDEXIANXIANG。

新疆风采18选7走势图  ZAIDIANYUANDIANYAVDD WENDINGSHI,74HC595 DEGAODIANPINGSHUCHUDIANYAV YEHENWENDING,RUDIANYUANDIANYAVDDWEI6V SHI,V = 5.9V。SUOYIDANG74HC595DEMOUYIWEISHUCHUWEIGAODIANPINGSHI, QIDUIYINGLIEDEL ED JIANGBEIDIANLIANG,QIEQIZHONGLIUGUODEDIANLIUJINSIWEI:

只要合理选择R1、R2、R3 的值,就可保证LED 中流过的电流稳定不变,并且可以使LED发光二极管工作在正向电流与对应发光亮度的最佳状态。

  YONGZHEIZHONGLIEHENGLIUQUDONGFANGSHIGONGZUO,KEYIZUODAOBUGUANYIXINGZHONGLEDGUANZIDIANLIANGSHUDEDUOSHAO,QIXINGQUDONGGUANDEGUANYAJIANGSUIRANRENGYOUBIANHUA,DIANYUANDIANYAVCCYEKEYIYOUSUOGAIBIAN,YOUYUMEIGELEDFAGUANGERJIGUANZHONGLIUGUODEDIANLIUHENGDINGBUBIAN, CONGERBAOZHENGLELED XIANSHIPINGLIANGDUDEJUNYUNXING


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