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

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

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

(???? ????)

?:???

??“?????”

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

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

2?????????

3?????998

4?????

5???????

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

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

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

(???? ????)

?:???