tft lcd polarisation in stock

The global production volume of polarizers in 2021 is estimated to have attained 627.45 million square meters, 108.8% of that of previous year. By LCD type, those polarizers for thin-film-transistor liquid-crystal display i.e. TFT LCD, and for Active-Matrix Organic Light-Emitting Diode i.e. AMOLED are estimated to have occupied overwhelming 99.1% of the entire polarizer production volume.

The global production volume of polarizers for TFT LCD and for AMOLED grew prominently by 9.1% to 621.50 million square meters. Because special demand for displays caused by at-home spending stemming from self-quarantine in the COVID-19 calamity continued in 2021, almost all the polarizer manufacturers kept their full-scale production. Yet, tight supply in polarizers mainly for large display screens continued until the third quarter 2021.

Polarizers in this research refer to those polarizers for TFT (Thin Film Transistor)-LCD, AMOLED (Active-Matrix Organic Light-Emitting Diode) and for PM-VA (Passive Matrix Vertical Alignment) monitors, in addition to those for TN (Twisted Nematic)-LCD, and STN (Super Twisted Nematic)-LCD. The polarizer market size is calculated based on the production volume at manufacturers in 10,000 square meters.

A liquid crystal display (LCD) has liquid crystal material sandwiched between two sheets of glass. Without any voltage applied between transparent electrodes, liquid crystal molecules are aligned in parallel with the glass surface. When voltage is applied, they change their direction and they turn vertical to the glass surface. They vary in optical characteristics, depending on their orientation. Therefore, the quantity of light transmission can be controlled by combining the motion of liquid crystal molecules and the direction of polarization of two polarizing plates attached to the both outer sides of the glass sheets. LCDs utilize these characteristics to display images.

An LCD consists of many pixels. A pixel consists of three sub-pixels (Red/Green/Blue, RGB). In the case of Full-HD resolution, which is widely used for smartphones, there are more than six million (1,080 x 1,920 x 3 = 6,220,800) sub-pixels. To activate these millions of sub-pixels a TFT is required in each sub-pixel. TFT is an abbreviation for "Thin Film Transistor". A TFT is a kind of semiconductor device. It serves as a control valve to provide an appropriate voltage onto liquid crystals for individual sub-pixels. A TFT LCD has a liquid crystal layer between a glass substrate formed with TFTs and transparent pixel electrodes and another glass substrate with a color filter (RGB) and transparent counter electrodes. In addition, polarizers are placed on the outer side of each glass substrate and a backlight source on the back side. A change in voltage applied to liquid crystals changes the transmittance of the panel including the two polarizing plates, and thus changes the quantity of light that passes from the backlight to the front surface of the display. This principle allows the TFT LCD to produce full-color images.

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They want $4,000 for the Planar setup, whereas the exact same monitors used to make it are about $120 apiece in good used condition on eBay. If you are already using an LCD monitor, get a second identical unit, so you already are halfway there as you read this

To do a quick mock-up use a piece of cardboard or paper of the size you want to order, hold it where the mirror is in the Planar setup as you sit in your normal viewing position in front of your monitor, try to get a 45? angle or so out of the paper/cardboard. Then check if you can still see the screen, if the answer is no, then it is a good size to use, get a couple extra inches to be safe. The mirror will allow you to see the LCD display like normal, with the reflection of the second LCD overlayed on top of it.

All you need is the above mentioned 2 LCD displays, be creative, 15" is fine on a budget (you can get them from people upgrading a Dell/Gateway/Emachines/HP bundled LCD display) 19" Widescreen, even 24", 30" or 50" should be possible, start with a smaller/cheaper "proof of concept" edition and then move up to the big leagues, remember that you will need a video card capable of driving the panels in native resolution for the games you want to play at an acceptable frame-rate (unless your monitor will show 1:1 with a black border on lower than native resolutions). With dual 1280x1024 17" panels that makes 2560x1024 pixels per frame, or 1280x2048, depending on how you look at it.

Basically any size LCD screen will work, as long as it is 45° polarized, get some cheap glasses from here: http://www.berezin.com/3d/3dglasses.htm#Polarized ($2 for 3, $6 for 10) and see if yours is, one eye will be dark as you look at the LCD, the other eye will remain clear.

As you put the LCD"s in the Planar arrangement shown above with a mirror (even plain glass could be used, ask a glass store for a scrap, it just will not be as reflective), the LCD that reflects off of the glass switches polarization by 90? and will be visible in one lens, while the other will not see it.

There will be some ghosting , even more when you use the mirror. To confirm the polarisation of the monitor Rotate the glasses while looking at the monitor thru one side or the other At one point the lens should be almost completely opaque Hopefully this should be normal angle at which the glasses are used

I have pictures, I haven"t got them uploaded anywhere yet, so I can"t show them. I went with the 2x4 and plywood route, with 2 aluminum straps to connect the mounting pads on the back of the LCD"s with the 2x4. I used a bit of solid copper insulated building wiring to hold up the mirror, it functions to a point.

Just curious. Is there any way of finding out the polarisation angle for LCD-screens before bying? The one i have now have straight 90? polarisation. I have a dual projector setup now but i am a little bit curious about a planar design with TFT"s (if not else i really like the innovative aspect).

In this thread i"m asking if anybody knows ho to get the polarisation angle for LCD-monitors. When asking resellers i get an answer type: "Polarisation angle? I"m not really sure what you"re talking about but i assure you we"we got a monitor that perfectly suits your needs bla bla". Also downloaded some pdf"s but haven"t found one yet with those kind of data...

This method has you look at one monitor directly, and use a standard mirror (or a front surface mirror) on your other eye to look at the second screen. I have thought of using this to make a franken-HMD, possibly mounted on an eye-level shelf with a movable chair, or a floating helmet supported by some sort of arm or chain to the ceiling. There are 10"-14" LCD screens that are 1280x768 or 1900x1200, and you could make quite the helmet rig with couple of those.

I"ve just bought a pair of paper glasses linearly (45/135) polarized. I discovered that my acer 1916w lcd monotor (19" widescreen) is polarized at 45° because

EDIT: using my shutterglasses with normal position I can see the screen of the LCD, tilt the glasses 45 degree and it"s almost black. With the shutterglasses at 90 degree it"s clear again. So even this doesn"t tell the polarization angle of the Dell"s (since I don"t know the polarization angle of the shutterglasses, I assume the pol. angle of the shutterglasses are the same as that of the polarized glasses that people used in their planar setup ?), is it safe to say the Dell"s are polarized at 45 degree ?

EDIT2: Tried the shutter glasses with my laptop LCD and found that with normal horizontal position it"s black and in perpendicular position it becomes clear so I think the best way is to buy a pair of polarized glasses and test it with the Dell"s LCD to make sure it works/or not and if the 45 degree glasses don"t work with the Dells then I should be able to try the 90 degree ones, I hope they do exist.

I"m about 98% complete with my dual acer 20" planar cube.. was wondering about convergence settings in the old nvidia cp but the other thread helped out there. The last thing I"m trying to figure out to make the planar complete is whether or not my top lcd needs the brightness and contrast to have higher luminance than the back lcd. On the XP desktop I still get a horiztonally flipped image from the top lcd until I engage a game - then the top lcd flips horizontally after DX9 is implemented.

Should the back lcd or top lcd be brighter and higher in contrast for tweaking convergence and separation, since that is the final step here and I haven"t had a lot of time to do any testing?

I was wondering about the pop out effect with this.. mine is set up correctly and plays a good number of games but if there is any pop out it somewhat just shows at the front of the cube at a seemingly closer distance to your eyes. If a bracket method is used, does any kind of light become a big problem anywhere along the line with reflections and shadows anywhere? I"m asking because in the dark and with a bracket where you can"t notice the glass too much that perhaps the S3D effect does appear to pop out from the screen into thin air as well as depth... because mine is like looking into an lcd monitor almost 2 feet deep with a very compatible game. I would think with a bracket you would have a neat holographic pop out effect in pitch dark, but another post mentioned something about needing a little light so the pupils do not dilate to reduce crosstalk.

I got a 70/30 teleprompter mirror from telepromptermirrors.com or something close to that for $152 or so. What showed up appeared to be a 50/50 piece instead after the "white card test" proved nothing, and they accept no returns at all, but the 50/50 works just fine. I"m very happy with the planar. If you order from them, as soon as the glass arrives call them and ask them to walk you through the white card test to see if they sent you a 50/50 instead of a 70/30 or 60/30. If you see no gap when a white index card is at the mirror, then that is the silvered side according to that company. On mine, there was no difference and both sides had the gap, but the reflected top lcd colors are slightly off in desktop mode.. would you say that is that normal? Also, I have to tilt the berezin $3 glasses slightly clockwise on my face to eliminate ghosting sometimes.

Hi folks, there are lots of posts about this dual LCD + polarized glasses but all are about a vertical setup. I got a noob question that"s been gnawing: why there is no talk about setting it up horizontally, similar to planar/mirror setup? Is it because it"s technically not possible? This would eliminate the hassle building a framework for the vertical monitor. (You guys can see I haven"t dwelled into this too much technically hence this silly question, BTW anyone has pointer to some good read on this dual LCD+polarized stuff better than what google gives?). Thks. DR

Yep I tried the "2 LCD + Mirror" method using just a handheld small mirror and saw that it works with a head movement restriction and that"s why I"m interested in "the beamsplitter + 2 LCD + polarized glasses" technique since it solves the head movement restriction problem. But so far I"ve read only about vertical setup of this technique and none uses the horizontal method given that with the horizontal setup there is no need for an elaborate framework to hold the upper LCD, in addition both LCD"s can still be used normally easily (just remove the beamsplitter and you can have a dual monitor setup for work, put it back in and you have nice S3D setup for games), I guess that"s why I thought there might be technical issue that prevents such a setup and want to check first since to me it seems more practical and useful than the vertical method. DR

And of course you should be able to use horisontal with a semireflective mirror as well. If the polarization of the lcd"s is 45° or 135° it should work without extra retarders+polarizers.

I"d hope polarized glasses vendors should have all kinds of flavors to sell and not just 45/135. I don"t know what my LCD"s polarization are except that they are different from my laptop"s which also an unknown. It"s likely that"s the laptop being 45 degree and the desktop 0 degree, in that case I need to order a pair of 0/90 polarized glasses without resorting to retarders, I think.

Likay wrote:And of course you should be able to use horisontal with a semireflective mirror as well. If the polarization of the lcd"s is 45° or 135° it should work without extra retarders+polarizers.

The problem is that the semireflective mirror only handles the polarizationshift if the lcd"s polarization is 45 or 135°. (Otherwise you need to shift polarization of one monitor 90° or both 45°).

The problem is that the semireflective mirror only handles the polarizationshift if the lcd"s polarization is 45 or 135°. (Otherwise you need to shift polarization of one monitor 90° or both 45°).

Doesn"t this cause additional loss of brightness? I hope it doesn"t become as bad as what LCD shutterglasses has. Let"s see, loss due to beamsplitter, loss due to additional retarder, loss due to polarized glasses. It can"t be good. Before I spend time and money on this, I"d like to know more about this. Thanks Likay.

distantreader wrote:Hi folks, there are lots of posts about this dual LCD + polarized glasses but all are about a vertical setup. I got a noob question that"s been gnawing: why there is no talk about setting it up horizontally, similar to planar/mirror setup? Is it because it"s technically not possible? This would eliminate the hassle building a framework for the vertical monitor. (You guys can see I haven"t dwelled into this too much technically hence this silly question, BTW anyone has pointer to some good read on this dual LCD+polarized stuff better than what google gives?). Thks. DR

On a desk: OK as long as you can get the mirror lined up. Best with a platform 8-12 inches above desk height so you have room on the desktop, and so you are looking into the screen. Needs nothing but 2 LCDs and a piece of glass, so near free. Nothing to build, just set on a desk. Option to slide second screen back and use 2 monitors (great if you do any 3D modeling/texturing, or work with Gimp/Photoshop)

I didn"t try it with polarised filters, don"t want to buy them because the 2 crt"s setup was just a test and is too "big" to keep on my desk so I think it"s better to use 2 lcd"s wich are polarized already but the rendering of the 2 pictures seem to be very good