电子显示屏的芯片详细解说！【1】
问题1：什么是扫描方式1/4扫指的是一次扫4行，1/8扫，1/16扫也是一样的，要看行信号有几个，二个为1/4, 三个为1/8,四个为1/16。
举1/16扫描方式例来说,16行共享一个595器件驱动,每一行点亮的时间是整个扫描周期的1/16,如果是1/4扫描,那么每一行点亮的时间就是整个扫描周期的1/4,这样1/4扫描电路的占空比不就比1/16的高么?也就是说每一行点亮的时间相对要长,那1/4方式就比1/16方式的亮.
一、电路基础与常用元件的用途
什么叫电路？
电路是由相互连接的电子电气器件，如电阻、电容、电感、二极管、三极管和开关等，构成的网络。电路的大小可以相差很大，小到硅片上的集成电路，大到输电网。根据所处理信号的不同，电子电路可以分为模拟电路和数字电路。
模拟电路对信号的电流和电压进行处理。最典型的模拟电路应用包括：放大电路、振荡电路、线性运算电路（加法、减法、乘法、除法、微分和积分电路）。
数字电路中信号大小只表示有限的状态，多数采用布尔代数逻辑对信号进行处理。典型数字电路有，振荡器、寄存器、加法器、减法器等。
CMOS门电路中输出高电平VOH与输出低电平VOL。CMOS门电路VOH的理论值为电源电压VDD，VOH（min）=0.9VDD；VOL的理论值为0V，VOL（max）=0.01VDD。所以CMOS门电路的逻辑摆幅（即高低电平之差）较大，接近电源电压VDD值。
TTL门电路电平：
输出高电平>2.4V,输出低电平<0.4V。在室温下，一般输出高电平是3.5V，输出低电平是0.2V。最小输入高电平和低电平：输入高电平>=2.0V，输入低电平<=0.8V，噪声容限是0.4V。
断路/开路：电流在电路中没有形成回路。
短路：电流没有直接正常通过负载，而通过一个与负载并联的很小阻值的物体，并且该物体不在设计电路的电气范围内，是由其它原因引起的连接的现象叫做短路。有意识的短路不会引响电路的正常运行，无意识的短路将会损坏电路，以至不能正常工作。
直流（电压/电流）：电压/电流的相位不会随时间发生变化。
交流（电压/电流）：电压/电流的相位随时间的变化而变化。
恒流：电流不会随负载的变化而变化。
恒压：电压不会随负载的变化而变化。
数字信号：只有高/低电平的出现，电脑处理的就是数字信号，我们的LED显示屏也一样，一般高电平用“1”或“H”表示，低电平用“0”或“L”表示。数据用二进制、八进制、十六进制表示，八进制用的较少。我们日常用的是十进制。
例：二进制（01010101）=八进制（125）=十六进制（55H）=十进制（85） **** Hidden Message ***** 老大现在的单元板做得如何啊？ 供不上货{:1_97:} 可不是啊 走货量这么大 回复下，继续看哦{:1_146:} 来 ***400;200;400,200;;** m56,53 l57,53,62,54,66,55,78,57,87,58,95,59,102,61,109,62,121,62,121,61,122,61 e|********* m99,61 l99,100,97,104,97,106,96,109,94,111,94,113,91,116,91,117,88,117,87,116,83,114,81,114,78,112,72,109,70,107,65,103,62,101,61,99 e|********* m116,43 l117,42,134,42,141,44,149,45,156,47,165,48,191,48 e|********* m156,51 l155,53,154,53,153,54,152,56,146,62,145,64,143,65,143,66,141,67,140,69,139,69,139,70,138,72,137,73,136,73,135,74,135,77,134,78,133,78,133,87 134,88,134,91,136,93,136,95,138,97,138,99,139,99,139,101,140,102,140,105,141,105,141,103 e|********* m141,78 l165,78,167,79,170,80,173,80,177,82,178,83,181,84,182,84,182,85,183,85,185,87,186,89,188,90,188,91,190,94,191,95,191,96,193,98,193,108,192,110 191,110,191,111,190,111,190,113,188,113 e|********* m164,91 l164,96,162,98,161,100,161,101,159,104,158,107,157,108,155,112,154,112,153,114,152,114,152,115,150,117,148,118,148,119,147,119,146,120,144,120,143,121,138,121 137,122,128,122 e|********* m167,122 l168,122,169,123,171,124,173,128,174,129,177,131,183,137,186,139,188,141,190,142,192,144,198,148,200,149,202,151,204,152,207,154,208,155,211,155,211,156,212,156 215,158,218,159 e 回复了继续收看！！！！ 回复了看以下····呵呵 看一下下面是什么东西
asyangang 发表于 2009-3-15 12:27 http://www.521led.com/images/common/back.gif看一下下面是什么东西 顶你个肺，好东西才找到！ 回复了继续收看bbbbbbbb 回复了继续看？、、、、、、、、、、、、、、、、、 回复下，继续看哦——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=108&fromuid=344 ***400;200;400,200;;** m138,56 l135,56,133,58,130,58,128,60,119,63,115,65,110,67,106,69 e|********* m94,82 l95,82,96,81,98,81,99,80,101,79,102,79,103,78,104,78,106,77,109,76,113,75,120,75,122,74,123,73 e|********* m88,92 l90,91,91,90,94,90,97,89,102,89,108,88,111,87,115,87,115,86 e|********* m111,71 l109,75,104,82,98,94,92,103,85,112,82,116,80,119,79,120 e|********* m98,100 l98,101,97,103,95,109,95,117,94,120,94,123 e|********* m98,98 l99,97,104,97,106,96,114,96,114,127,113,131,112,133,112,135,111,135,110,136 e|********* m102,105 l102,106,104,106,106,107,110,108,110,109,112,110 e|********* m98,116 l98,117,99,117,100,118,103,118,105,119 e|********* m97,128 l97,129,98,130,105,130 e|********* m189,53 l188,53,186,54,183,55,177,58,169,63,162,67,153,72,146,75,141,77,137,80,136,80,135,81 e|********* m138,87 l170,87 e|********* m148,97 l151,97,154,96,158,94,163,94,164,93,165,93,167,91 e|********* m159,80 l157,82,155,90,150,99,147,107,141,119,137,125,136,126 e|********* m154,111 l153,111,152,113,152,120,151,122,151,125 e|********* m153,101 l153,100,156,100,157,101,157,131,156,132 e|********* m153,110 l154,110,156,111,158,113,157,114 e|********* m152,119 l153,120,153,121,154,121,154,122 e|********* m153,126 l154,127,155,127 e 值得学习，感谢分享！ 值得学习，感谢分享！ 老大的文章一定要顶!!!!!!!!!!!!!!!!!!!!!!!! ***400;200;400,200;;** m77,27 l75,27,69,30,64,33,62,34,61,34,59,35,52,39,51,40,49,41,44,43,39,46,35,48,28,51,22,53,18,53,17,54,15,54 e|********* m38,55 l40,56,84,56,86,57,90,57 e|********* m34,76 l90,76 e|********* m50,40 l50,41,53,46,54,48,55,52,57,56,59,62,60,68,60,75,62,80,62,103,52,123,50,128,48,132,45,135,44,137,36,145,34,148,33,148,31,150 e|********* m58,106 l58,109,59,115,61,120,62,121,63,123,65,129,67,133,68,138,69,140,70,144,77,158,77,164,78,166,78,167 e|********* m64,108 l76,108,83,106,90,105,122,105,123,106,124,108,126,120,126,141,127,143,127,149,128,151,128,155 e|********* m78,123 l97,123 e|********* m82,137 l83,138,99,138 e|********* m78,163 l79,164,103,164,108,166,118,166,124,168,133,168 e|********* m216,15 l216,16,210,28,200,38,198,39,194,43,188,46,183,47,182,48,178,50,169,50 e|********* m171,70 l241,70,245,68,250,68 e|********* m171,91 l202,91,226,94,234,96,279,96 e|********* m199,49 l200,50,201,55,202,61,203,65,204,71,204,122,202,130,201,136,200,144,198,150,198,152,196,158,195,160,195,165,185,185,185,187 e|********* m209,133 l210,134,213,140,215,147,216,148,218,154,219,159,220,161,221,167,222,169,223,170,227,178,228,179,228,181 e|********* m217,120 l254,120,266,121,279,124,291,125,301,127,312,128,320,130,326,131,330,131,331,132,332,138,332,187,333,189,333,190 e|********* m241,136 l244,136,250,139,255,141,257,142,261,143,265,145,270,146,272,147,273,148,275,148,275,149,272,155,270,157,269,157,267,159,266,161,262,165,262,166,261,167,260,169 262,170,266,174,272,178,274,179,280,183,290,184,296,187,304,188,320,188 e|********* m239,179 l240,179,243,180,251,183,257,185,264,188,274,192,286,195,297,198 e 66666666666666666666666 继续收看……{:1_148:} 1# 36011368 ***400;200;400,200;;** m63,26 l63,28,64,30,64,39,63,44,62,48,59,54,57,59,52,64,50,67,47,69,46,71,44,73,41,75,39,76,35,76,35,77,43,89,51,99,62,114,79,134 93,156,108,173,123,193,125,197 e|********* m123,97 l120,101,116,111,109,121,103,130,94,140,87,149,81,158,68,171,63,175,59,180,53,184,49,186,45,190,39,190,38,189 e|********* m10,63 l17,63,21,65,27,67,33,68,37,70,42,72,46,73,52,76,57,78,64,81,67,85,73,89,83,93,92,96,100,99,109,104,112,105,116,106,118,108,120,108 e|********* m109,60 l112,60,117,61,120,62,128,64,140,65,153,67,167,71,177,74,195,74,204,76,209,77,210,77,210,78,207,81,200,86,192,91,186,96,177,100,171,102,164,105 159,106,155,108,154,109,154,112,157,117,161,125,166,131,170,141,176,149,183,170,187,177,188,182,190,184,190,186,187,186,183,184,180,183,175,181,160,176,157,172 150,165,147,164 e|********* m144,160 l147,160,151,157,160,154,171,150,183,145,193,140,208,137,222,135,235,133,246,131,253,130,258,130,260,128,264,128 e 新人学习中，多看看帖子 学习中。。。。。。。。。 详细学习一下！！！。。。。。。。。。。 ***400;200;400,200;;** m34,30 l33,30,32,31,31,34,31,36,28,45,27,49,27,54,26,59,20,80,18,92,17,96,17,108,19,110,20,113,22,114,24,116,25,119,28,119,29,120,31,120 33,119,36,117,38,116,39,114,41,113,42,112,43,109,43,103,44,101,44,100 e|********* m47,93 l47,102,48,103,48,104,49,104,50,105,52,105,56,101,58,98,61,95,61,90,59,88,58,86,57,86,56,84,50,84,50,89 e|********* m79,90 l78,91,78,99,80,101,80,102,81,102,83,103,84,104,88,104,91,103,92,101,94,99,94,97,95,95,95,84,93,82,90,80,88,79,82,79,80,80,80,83 79,84 e|********* m123,54 l125,61,126,69,126,119,125,123,123,129,122,131,122,134,121,134,123,131,126,130,128,128,129,125,132,122,136,116,137,113,137,110,138,107,139,105,139,98,141,96 142,94,145,91,147,90,148,89,150,89,152,91,152,104,151,105,147,107,135,111,131,113,130,114,131,115,134,116,149,116,152,118,156,120,159,120,159,119 e|********* m227,52 l226,59,224,67,224,130,225,131,234,131,237,130,239,128,241,127,242,126,243,124,243,119,244,120,245,125,247,133,248,138,250,141,251,143,253,145,255,144,257,138 259,134,260,131,262,129,262,118,261,117,259,116,258,114,251,114,249,115,248,116,248,117,288,117,288,118,291,130,292,135,294,141,296,145,296,146,297,147,313,147 316,144,317,141,317,131,316,127,313,122,311,119,307,115,304,115,303,114,297,114 e|********* m345,62 l343,67,343,89,340,99,338,109,338,159,337,161,337,163,336,164,335,162,334,156,334,152,333,146,333,129,334,127,337,124,338,122,340,119,341,118,343,117,343,115 345,114,350,114,354,116,358,117,361,118,363,119,364,120,364,128,363,130,361,131,359,134,357,136,352,138,348,139,342,141,337,143,334,144,332,144,335,146,338,146 343,147,364,153,367,154,371,154,373,152 e 看完A面再看B面！连连看！ 支持 顶 强烈的顶ddddddddddddddd 回复了看以下····呵呵——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=108&fromuid=1902 {:1_137:}{:1_137:}{:1_137:}{:1_137:} 学习了，谢谢老大！！！