Which company produces optical micro switches using LK Light strike technology?

Question

Iron

Which company produces optical micro switches using LK Light strike technology? In particular, at the end of 2015, the Taiwanese A4Tech company released keyboards and mice with optical (infrared) mic switches marked LK, upon request they declare that this is their development and patent and do not sell separately optical mics that have a lot of advantages - a long work cycle of 20 million guarantee and the absence of interference and ultra-fast operation of the contact in 1 millisecond!

Answer 1

A4 releases them, under the Bloody brand . I have not seen any other modern ones anywhere, and have not seen any mention of them either. The principle technology is not new, but in its current form surfaced only last year.
Community r/MechanicalKeyboardssees a direct benefit in the absence of chatter (although Topre capacitive-mechanical switches are just as good in this sense), which increases the speed and accuracy of the response. On the other hand, they also raise justified fears that a large number of precise optical components in a tool that is regularly tapped with fingers is likely to lead to early failures, and it would be worth waiting for the technology to mature. (Here you need to understand that the MTBF of each individual switch in greenhouse conditions and the probability of failure of at least one of 100+ on the keyboard in real conditions are numbers of a completely different order.) Plus, they do not have tactile feedback, similar to Cherry MX Red, which not very good for printing.
In Moscow, Bloody B640 can be bought for 6.6-7 thousand. If you have free money and a desire to take risks - go for it.