Скачать или смотреть What is Liquid Crystal Physics? Smart Materials, Lasers, Kevlar, LCDs and More!

Here we take another Tour Through Physics and introduce a field of physics that doesn't maybe get the exposure it deserves. This time: Liquid-Crystal Physics

For an excellent, more detailed video on LCDs specifically see The Engineering Guy:

   • LCD Monitor Teardown  

Note on laser pumping:

Semiconductor lasers, like those in your CD/DVD/Blu-ray player are electrically pumped meaning the gain medium is kept excited by an electrical current. However, it is far more common for laser to require optical pumping with an external light source exciting the medium. In the ideal case on can use something like a flash lamp, however, often one may need to actually use another "seed" laser to pump a second laser. Obviously this isn't ideal but it's still worth it if the final laser has superior properties to the seed laser.