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

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

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

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

???:??????

“????????”_????

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

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

2??????????

3??????????

4???????

5????????

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

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

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

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

???:??????