液晶显示器背光模组LCD光学概论

液晶显示器背光模组LCD光学概论
12
Critical angles and total reflection of LGP
n 1
c
n
1
2
Critical angle c '
2
c
si
n1 1 n
液晶显示器背光模组LCD光学概论
13
Refraction Index v.s. LGP
•Refraction indexproper energy
1 n
n 1 n 2 c 1c 2 L 1 L 2
液晶显示器背光模组LCD光学概论
15
Refraction Index v.s. LGP
•折射率大者,單位面積能量使用率較大 (x, ) f(x)g (d )
x1
c1
n1
x2
c2
n2
d1 d 2
n1 n2 c1 c2
d1 d2
x1 x2
液晶显示器背光模组LCD光学概论
10
Roughness The diffusion effect depends on the
roughness of the interface of the media.
R1
R2
R1R2R3R4
R3
R4
液晶显示器背光模组LCD光学概论
11
Applied optics to LGP
' 1 2
n 1
n1; n2
s in 1n1s in' sin 2n2sin '
n1n2 12
液晶显示器背光模组LCD光学概论
14
Refraction index v.s. LGP
•refraction indexeffective area of luminary
L2 L1
c2
c1
c
s in1
IV,The future of the Back-light Modules
液晶显示器背光模组LCD光学概论
3
The main optical units constructed in back-light modules
Lamp reflector
prism lens
diffuser LGP
CCFL
1 2
液晶显示器背光模组LCD光学概论
transports through it.
2, the reflection of light acts according to the
reflection rule.
3, the refraction of light acts according to the
refraction rule. 液晶显示器背光模组LCD光学概论
'
液晶显示器背光模组LCD光学概论
6
The Refraction Rule of Light
In
N
n
n'
' Rfr
1, ,insert line(In ),normal(N) and reflect line(Rfr ) are on the same plane.
2,insert angle and refraction angle act according to the Snell’s law
8
The Critical Angle and Total Reflection
When nn'and '
2
1
sinn'sin
n 2
c
n
n'
2
1
c
si n1n' n
Critical
angle
c Total reflection c Normal refraction
液晶显示器背光模组LCD光学概论
Patterns (elements)
reflector
液晶显示器背光模组LCD光学概论
4
The Reflection and Refraction of Light
1,Reflection and refraction phenomena
will happen on the interface when light
nsin n'sin '
液晶显示器背光模组LCD光学概论
7
The meanings of the Snell’s Law
1,if nn'
s i n s i' n '
00'
2
2
2,if nn'
s i n s i' n '
00'
2
2
What’s happened when ' ?
2
液晶显示器背光模组LCD光学概论
5Biblioteka Baidu
The Reflection Rule of Light
1,insert line( In),normal( N)
In
N
Out and reflect line( Out) are on
the same plane.
'
2,insert angle is equal to the reflection angle.
9
Diffusion
When parallel light waves through rough surfaces or particles, diffusion will be formed by the reason that nonparallel factor of the normal for those surfaces and particles.
•fundamental principles--total reflection and diffusion
•the optical properties of the printed units •the optical properties for different types of
reflection units •the properties of the print-less LGPs
2
contents
Section 1
I, Introduction to Fundamental Optics II,Apply Optics to LGP
Section 2
III,Applied Optics in the Construction of the Back-light Modules
THE THEORY AND DEVELOPMENT OF THE BACKLIGHT SYSTEM FOR LIQUID
CRYSTAL DISPLAYS
液晶显示器背光模组LCD光学概论
1
液晶顯示器的結構
實物圖
Color filter
LCD PCB
液晶显示器背光模组LCD光学概论
Backlight module