最新学术英语演讲PPT教学文案

1 The types of monochromatic light LED
The types of monochromatic light LED and its
1
development history
The early monochromatic light LED was made in 1960s.which only glow red.by the mid-70s,that can Green ,yelloew,and orange .in the early 80s, brigheness greatly enhanced
学术英语演讲PPT
The research of efficient blue LED
Part One
Part Two
The development of LED The fictions of LED
Part Three
Part Four
庞彦红
王鑫
李帅
魏铎垒
The research of efficient blue LED
The development of LED
Part One
庞彦红
ABOUT
LED
From 1907 it was discovered that a semiconductor material can shine after power ,which lead to birth of high-brightness LED lamp. The rapid development of LED lighting technology, has brought great changes for to people's lives
1 The Introduction LED development)
ONE
The types of monochromatic light
LED and its development history
TWO
The development of composite light LED
THREE
The rapid development of the white LED
street lamp:
screen:
various devices
2
second
Consume less energy
VS
Reduce 80% energy comsumption
3
Third
Long life
60,000-100,000 hours
Avoid frenquent lamp replacement
Part Four
魏铎垒
IN OUR DAILY LIFE
USE LIGHTING
GLASS MAKING
1,save energy 2,environment protection 3,small and power
1,beautiful and colorful 2,energy saving=money saving 3,high safety
3 The rapid development of the white LED(复合光LED)
3
The rapid development of the white LED
With technology advances in recent years, LED developed rapidly and be used in the automotive high beams and other high brightness applications.
2 The development of composite light LED(双色光LED)
Leabharlann Baidu
2
The development of composite light LED
The LED from red to blue LED and LED white LED through three stages, red and green are monochromatic(单色) LED. The white LED appeared on the market in 1998, marking a composite light white LED with white, that pushed the development of LED lighting to a new starting point.
clothes
view
decoration
We still have a long way to search. I believe blue LED lights will lighten the 21st centary.
Thank you for watching
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10 times as long as traditionai lights
4
Fourth Green
non-poisonous
Recyclable
The research of efficient blue LED
Part Three
李帅
The research of efficient blue LED
The research of efficient blue LED
The fictions of LED
Part Two
王鑫
1.Small size and light weight 2.Consume less energy 3.Long life 4.Green
1
first
Small size and light weight