Photoalignments

1D ESHFLC grating	2D ESHFLC grating	Diffraction Profile
ESHFLC Fresnel Lens 1)ESHFLC focused and Off state, 2) ESHFLC focused and defocused state.

Polarization gratings	LC lens with tunable focal length	Optical rewritable LCD

Technology:

LC alignment achieved by light exposing on photosensitive alignment material.

Different alignment directions are obtained with different exposing light polarization directions.

Advantages:

Power Saving, Extremely Fast Switching Time (~10µs), High Contrast Ratio.

Elimination of electrostatic charges, impurities and mechanical damage of alignment surface.

Controllable pretilt angle and anchoring energy provides possibility of various new applications.

There is possibility of realizing multi-domain and more complex configurations.

Applications:

Photonics, Beam Steering, , LC lens with tunable focal length, see through display, polarization gratings and optical rewritable LCDs.

Optically Rewritable Liquid Crystal Display (ORW-LCD)
Technology:
 We developed new Optical Rewritable (ORW) liquid crystal technology and utilize it to create display. 
ORW display carries no electrodes on board and uses polarizer as substrates. 
The simple construction secures durability and low cost for mass. 
The on screen information is changed in writing unit that consists of LCD-mask
and exposure source based on 450nm LED, low power and cheap solution in comparison with Hg-lamps or lasers.





  

ORW LCD operates in ECB and TN liquid crystal configurations byIPS switching of

alignment direction within aligning material, caused by controlled exposure of polarized light (Fig.2).

Azo-dye aligning film rotates its aligning direction in-plain keeping perpendicular to

the polarization of writing light. LC follows top aligning direction switching between

ECB and TN modes. So the LC structure is always stabilized by the surface.

 
 
 
 
 
 
 
 
 
The image is truly stable, can be written to grey level with saturation and rewritten a large number of times
with high reproducibility of properties. 
The image can be written, seen and rewritten through a commercially available polarizer.
 
 
 
 
 
 
 
 
 

Advantages:
Display and Drivers are separated
No ITO plastic substrates is required
ORW-LCD directly on polarizers
Very cheap and simple display piece (good for mass)
Cell-gap non-sensitive display with stable grey levels (50% gap change tolerable)
High contrast in reflective mode (>81:1 with >30% reflection)
0V power consumption

Applications: 
Display for Plastic card (Phone Cards, Credit Cards, VIP Cards, supermarket labels and etc)
Blue laser printable paper-like matter