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The alignment of the liquid crystal molecules in an LCD is an application where XBH linearly photopolymerizable polymer technology can offer breakthroughs with regard to performance, yield and cost of LCD.

An
Photo-alignment layer is applied to the surfaces of the LCD substrates and optically aligned, thereby generating the required alignment and bias tilt angle for the liquid crystal molecules in the display. This process replaces the mechanical brushing of the polyimide layer that is used in the industry today, and offers a number of distinct advantages
 
溫度 透過率 ×109 mol· m-2 · s-1 · Pa-1 透過率比
N2 He CO2 He/N

CO2/N2

25°C 1.31 14.4 1.46 10.9

1.1

100°C 1.26 26.5 1.70 21.0

1.4

200°C 1.17 43.4 1.34 37.0

1.1

Comparison of Properties of XBH LC Alignment Layer with foreign samples
 

 
A
B
XBH

Condition

Printability
From LCD Manufacturer
Rework property
After precure at 80 °C
From LCD Manufacturer
Anti-rubbing
From LCD Manufacturer
Surface tension(dyne/cm)
35
38
38
 
Pretilt angle ( ° )
> 89
> 89
> 89
 
Visual inspection
(Yield %)
> 40
> 80
> 95
From LCD Manufacturer
VHR (%) RT
> 92
> 99
> 99
 
VHR (%) 60°C
> 70
> 98
> 98
 
RDC (mv)
290
360
370
 
Contrast ratio
575
590
595
 
Viewing angle
17
38
33
From LCD Manufacturer,
 CR at -80°
Image sticking
1
3
3.5
Grade 1(bad) ~ 5 (good) From LCD Manufacturer




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