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The first LCDs became commercially available in ___________

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The first LCDs became commercially available in ___________

(a) 1950s

(b) 1980s

(c) 1960s

(d) 1970s

This question was addressed to me in a job interview.

This is a very interesting question from Liquid Crystal Displays in chapter Combinational Circuits of Digital Circuits

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Correct choice is (c) 1960s

The best explanation: The first LCDs became commercially available in the late 1960s and were based on a light-scattering effect known as the dynamic scattering mode.

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