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What is the backplane in LCD?

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What is the backplane in LCD?

(a) The ac voltage applied between segment and a common element

(b) The dc voltage applied between segment and a common element

(c) The amount of power consumed

(d) For adjusting the intensity of the LCD

The question was posed to me in an online interview.

I'd like to ask this question from Liquid Crystal Displays in portion Combinational Circuits of Digital Circuits

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Right option is (a) The ac voltage applied between segment and a common element

Easiest explanation: The ac voltage applied between the segment and a common element is called the backplane(bp). In which each segment is driven by an EX-OR gate.

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