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

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

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

(? ????)

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

??“??????”????

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

????:1???????:??????????

2?????

3?????????

4????????

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

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

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

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

(? ????)

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