Sana ..

Seems you only have one name. Welcome to RG.

What type and size of LC cell do you require? Easy route if the real estate required is small is to use 2 thin glass plates and either squish the liquid between the plates ('splat seal') and then use UV curing cyanoacrylate (e.g. Norland 44) along the edges to seal in the liquid. If the real estate is larger (like a conventional nematic LC display) then you'll need to consider internal spacers (standard polystyrene spheres. e.g. at 5 um for a fast nematic LCD) to prevent the plates coming together and preserving the tight spacing required for all LC effects. If you're considering doing this on a larger scale, then one can screen print down an appropriate shape with 2 small holes either end (this also allows the internal spacers to be screen printed as well). The liquid film can either be drawn in via vacuum (the best route; only 1 hole required) or pulled in via surface tension - capillary fill - (that's why you need 2 holes to let the air exit the other end as the liquid enters one end). Again seal with an appropriate epoxy or UV curing adhesive. For spacers see:

https://www.chromspheres.com/lcd-spacer/

The figure at the bottom of page 7 in the attached shows a standard single sealed LC panel with an epoxy or UV dot. This will be a vacuum filled display.

Also see the attached figure from https://www.newvisiondisplay.com/how-do-lcds-work/ indicating the dot end seal (also vacuum filled). For a system without the ability to fill under vacuum then there would be 2 end seals (one on left as shown and an identical one on the RHS).

Thanks a lot Alan F Rawle for all the details.

I want to be comfortable with my first name only.

I am actually working in lab on just for research purpose. We are trying to study the aqueous liquid crystals which can evaporate to avoid the evaporation i reads in an article that doubled sealed cell is better.

Thats what i was confuse about.

they had use an extra glass in between the two glass substrate.

I just want to know more about double sealed cells. How can be different ways to make double sealed ones.

Thanks again

Regards

Sana ..

I look forward to your publications. This question has been asked before on RG (the search feature in RG is excellent) and here's a previous set of answers:

https://www.researchgate.net/post/How-could-I-make-the-LC-cell-be-sealed

To get a precise answer one needs a precise question. We are still unsure what size of device you wish to make, the desired spacing between the glass plates, the type of 'filling' (nematic/cholesteric, smectic) other than 'aqueous based', whether you'll be addressing the cells electrically (i.e. will you use ITO glass to produce a field; whether you need to pattern this), the type of alignment layer (will be different for homogeneous and homeotropic alignment governed by the type of cell). Answers to all the previous uncertainties allow a more precise answer to be given.

You can actually buy empty LC cells:

https://www.thorlabs.com/NewGroupPage9_PF.cfm?Guide=10&Category_ID=216&ObjectGroup_ID=5622

http://www.instec.com/portal/article/index/id/93/cid/66.html

... and fill them as you wish.

Alan F Rawle thank you . I will try to add more precise question next time. I will read all the links you have added.

All the details you have given above , I think I should to do more homework on my

Project. Your answer is really helpful I will keep in mind all those factors which you have mentioned.

Thanks again.

Sana ..

Take a look at:

https://explore.researchgate.net/display/support/Updating+your+account+name