2??????????????7??????????????,????,???????????,????,????,????,????????????“??”????????????,???????“????????”,????

????,“????”??????????????????LED???????,??????????,?????????????,???,?????????????

???????1984??1994?,???????

(????????????? ???????)

???????:????

??“??????????”

?? ???????????????? “??????”“????”????

????:1???????????:??v??

2?????q

3???????

4??????????????

5????????????

2??????????????7??????????????,????,???????????,????,????,????,????????????“??”????????????,???????“????????”,????

????,“????”??????????????????LED???????,??????????,?????????????,???,?????????????

???????1984??1994?,???????

(????????????? ???????)

???????:????